WO2023127399A1 - Underpants-type absorbent article - Google Patents
Underpants-type absorbent article Download PDFInfo
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- WO2023127399A1 WO2023127399A1 PCT/JP2022/044566 JP2022044566W WO2023127399A1 WO 2023127399 A1 WO2023127399 A1 WO 2023127399A1 JP 2022044566 W JP2022044566 W JP 2022044566W WO 2023127399 A1 WO2023127399 A1 WO 2023127399A1
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- Prior art keywords
- seal
- region
- lateral direction
- skin
- laminated
- Prior art date
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
Definitions
- the present invention relates to pants-type absorbent articles such as disposable diapers.
- Pants-type absorbent articles generally include an absorbent main body, an outer body, and side joints (side seal parts) that join the abdominal outer body and the dorsal outer body at side ends. There is The waist opening and the leg opening of the pants-type absorbent article are formed by joining the outer covering body on the abdomen side and the outer covering body on the back side by the side joints.
- Patent Document 1 discloses a pants-type disposable diaper provided with a pair of side seal portions having a main joint region and a sub-joint region formed by a plurality of embossed rows spaced apart in the left-right direction. there is The main joining region joins the front body and the back body. From the viewpoint of preventing the front body and the back body from being released, the secondary joint area is positioned laterally outside the main joint area and is formed so that the joint strength is weaker than that of the main joint area. .
- the pants-type absorbent article has a longitudinal direction extending from the wearer's abdomen through the crotch to the dorsal side, and a lateral direction perpendicular to the longitudinal direction and corresponding to the lateral direction of the wearer. and comprising an absorbent body, an outer body, and a pair of side joints.
- the outer body is arranged on the non-skin-facing side of the absorbent main body, includes a ventral region and a dorsal region located on both sides in the longitudinal direction, and is constructed by laminating a plurality of thermoplastic sheets.
- the pair of side joints joins the ventral region and the dorsal region of the exterior body at the side edges in the horizontal direction.
- the pair of side joints are an end region within 25 mm in the longitudinal direction from the waist end, which is the end on the waist side in the longitudinal direction; and a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction.
- At least one of the pair of side joints a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have.
- the laterally inner seal portion has a lower seal strength than the laterally outer seal portion.
- FIG. 1 is a schematic perspective view showing a pants-type absorbent article according to a first embodiment of the present invention
- FIG. FIG. 4 is a schematic plan view showing the side of the underpants-type absorbent article facing the skin, showing a mode in which the underpants-type absorbent article is unfolded and the elastic members of each part are stretched and spread flatly.
- FIG. 4 is a schematic plan view showing side joints of the pants-type absorbent article. It is a figure which shows typically the microscope image which expanded the cross section of the said side joint part about 300 times.
- FIG. 4 is a diagram showing an example of a graph obtained by measuring the seal strength in the waist end region of the side joint, where the vertical axis is the seal strength (N) and the horizontal axis is the distance from the peel start point on the inner side in the horizontal direction. indicates It is a diagram schematically showing a microscopic image of the seal portion of the side joint portion enlarged about 500 times, (A) is the fiber of the seal portion belonging to the laterally inner seal row, (B) is the laterally outer The fibers of the seal part belonging to the seal row are shown. 4 is an enlarged view of a main part of FIG. 3; FIG. FIG.
- FIG. 4 is a schematic plan view showing a side joint portion of the pants-type absorbent article, and a diagram showing the positional relationship between the seal portion and the elastic member.
- FIG. 4 is a schematic cross-sectional view of the side joint portion, showing a mode in which a ventral region and a dorsal region are separated.
- (A) and (B) are schematic plan views each showing a side joint according to a modification of the embodiment.
- (A) and (B) are schematic plan views each showing a side joint according to a modification of the embodiment.
- FIG. 4 is a schematic plan view showing side joints of a pants-type absorbent article according to a second embodiment of the present invention.
- FIG. 10 is a schematic cross-sectional view of a side joint portion of a pants-type absorbent article according to a third embodiment of the present invention, showing a state in which an abdominal area and a dorsal area are separated.
- FIG. 10 is a schematic cross-sectional view of a side joint portion of a pants-type absorbent article according to a fourth embodiment of the present invention, showing a state in which an abdominal area and a dorsal area are separated.
- FIG. 10 is a schematic cross-sectional view of a side joint portion of a pants-type absorbent article according to a fifth embodiment of the present invention, showing a state in which a ventral region and a dorsal region are separated.
- FIG. 11 is a schematic plan view showing side joints of a pants-type absorbent article according to a sixth embodiment of the present invention; It is a typical top view which shows the side joint part which concerns on the modification of the said embodiment.
- the side joints After wearing the pants-type absorbent article, the side joints are sometimes torn and discarded from the viewpoint of hygiene. Therefore, the side joints are required to have the function of not being peeled off during the wearing operation (when putting on the underpants-type absorbent article) and during wearing, and being able to be easily torn off at the time of disposal.
- the underpants-type disposable diaper described in Patent Document 1 required a strong force to tear the side seal portions, and the side seal portions could not be easily torn.
- the present invention relates to the provision of a pants-type absorbent article that can achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
- FIG. 1 The pants-type disposable diaper 1 has a waist opening 1W and a pair of leg openings 1L, and is worn around the wearer's waist and crotch when worn.
- the waist opening 1W has a waist opening end Wa.
- the diaper 1 has a longitudinal direction X and a transverse direction Y. As shown in FIG. The longitudinal direction X extends from the abdomen of the wearer through the crotch to the dorsal side.
- the lateral direction Y is orthogonal to the longitudinal direction X and corresponds to the lateral direction of the wearer. Further, as shown in FIG. 2 and the like, a direction perpendicular to the longitudinal direction X and the lateral direction Y of the diaper 1 is defined as a thickness direction Z. As shown in FIG. In this specification, the "waist side” means the side in the longitudinal direction X near the waist opening end Wa of the waist opening 1W, and the "leg side” means the side in the longitudinal direction X from the waist opening end Wa. It means the far away side.
- lateral direction Y inner side means the side in the lateral direction Y that approaches the vertical center line CL that bisects the pants-type absorbent article (diaper 1) in the lateral direction Y.
- Direction Y outside means the side away from the longitudinal center line CL.
- the side close to the wearer's skin when wearing the pants-type absorbent article (diaper 1) is sometimes called the skin side, and the side close to the clothes is sometimes called the non-skin side.
- the "skin-facing surface" of the pants-type absorbent article (diaper 1) or its constituent members means the surface relatively close to the wearer's skin.
- non-skin facing surface of the pants-type absorbent article (diaper 1) or its constituent members means the surface relatively far from the wearer's skin. Further, in this specification, numerical values such as dimensions and areas of each portion are measured in a natural state in which the elastic member of each portion is not stretched unless otherwise specified.
- the wearer When the wearer puts on the diaper 1, the wearer first puts the legs through the pair of leg openings 1L, pulls up the diaper 1 toward the body, and places the diaper 1 around the wearer's waist and crotch.
- this series of actions is referred to as a "wearing action”.
- the action of putting on the diaper 1 may be performed not by the wearer of the diaper 1 but by a caregiver.
- the state in which the diaper 1 is arranged at the wearing position that is normally assumed to be worn by the wearer is referred to as "when worn”.
- the diaper 1 includes an absorbent main body 4 and an exterior body 5 arranged on the non-skin facing side of the absorbent main body 4 .
- FIG. 2 shows a form in which the diaper 1 is unfolded, the elastic members of each part are stretched, and the diaper 1 is flattened so as to achieve the design dimensions in which the influence of the elastic members is completely eliminated. This mode is also referred to as the “deployed and stretched mode” of the diaper 1 . Unfolding the diaper 1 means separating the ventral region 5a and the dorsal region 5b of the side joints 8, which will be described later.
- the absorbent main body 4 is fixed to the skin-facing surface side of the exterior body 5 .
- the absorbent main body 4 has at least an absorbent body 40, and may further have a topsheet 2, a backsheet (not shown), and the like.
- the absorbent main body 4 has a configuration in which a back sheet, an absorbent body 40 and a top sheet 2 are laminated in the thickness direction Z.
- the absorbent body 40 includes a liquid-retaining absorbent core, and may further include a core wrap sheet covering the absorbent core. Materials used in the respective components (backsheet, absorbent body 40, topsheet 2, etc.) included in the absorbent main body 4 may be those used in the relevant technical field without particular limitations.
- the outer body 5 includes multiple thermoplastic sheets 50 .
- the exterior body 5 is configured as a laminate of a plurality of thermoplastic sheets 50, for example.
- the thermoplastic sheet 50 is a sheet material mainly made of thermoplastic resin.
- the thermoplastic sheet 50 preferably contains 90% by mass or more of thermoplastic resin, more preferably 100% by mass of thermoplastic resin.
- thermoplastic resins include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate; polyamides such as nylon 6 and nylon 66; These 1 types can be used individually or in combination of 2 or more types.
- the thermoplastic fibers may be short fibers or long fibers. As thermoplastic fibers, core-sheath type or side-by-side type composite fibers, split fibers, modified cross-section fibers, heat-shrinkable fibers, and the like can also be used.
- the outer body 5 has at least a ventral region 5a arranged on the ventral side of the wearer and a dorsal region 5b arranged on the dorsal side of the wearer.
- the outer body 5 of this embodiment further includes a crotch region 5c located between the abdominal region 5a and the dorsal region 5b and arranged in the wearer's crotch region.
- the ventral region 5a, the crotch region 5c, and the dorsal region 5b are arranged along the longitudinal direction X.
- the outer body 5 has a shape constricted inward in the lateral direction Y in the crotch region 5c.
- a leg opening 1L (see FIG. 1) is formed along the wearer's leg loop.
- the outer edge of the exterior body 5 is configured line-symmetrically (left-right symmetrically) with respect to the longitudinal center line CL.
- the exterior body 5 has a pair of side joints 8 where a side edge 5d in the lateral direction Y of the ventral region 5a and a side edge 5e in the lateral direction Y of the dorsal region 5b are respectively joined.
- the right side joint portion 8 has a structure in which a right side edge portion 5d of the ventral region 5a and a right side edge portion 5e of the dorsal region 5b are overlapped in the thickness direction Z and joined.
- the left side joint portion 8 has a structure in which a left side edge portion 5d of the ventral region 5a and a left side edge portion 5e of the dorsal region 5b are overlapped in the thickness direction Z and joined.
- the abdominal area 5a and the dorsal area 5b form a tubular shape along the waist of the wearer, forming a waist opening 1W and leg openings 1L of the diaper 1.
- the side joints 8 are preferably joined by heat sealing, ultrasonic sealing, or the like, as will be described later in detail.
- the side joints 8 maintain the jointed state without peeling off the ventral region 5a and the dorsal region 5b during the wearing operation and wearing.
- a caregiver or the like should separate the ventral region 5a and the dorsal region 5b of the side joints 8 from each other. are separated and the diaper 1 is unfolded and then discarded.
- the side joints 8 have such a structure that they can be prevented from being peeled off during the wearing operation and wearing, and can be easily torn at the time of disposal.
- the pair of side joints 8 are configured substantially line-symmetrically with respect to the longitudinal center line CL, for example, and have the same configuration.
- the configuration of one side joint portion 8 will be described in detail below.
- the side joints 8 are a waist end region 8c within 25 mm in the longitudinal direction X from a waist end 8a, which is the end on the waist side, and an end on the leg side in the longitudinal direction X. and a leg end region 8d within 25 mm in the longitudinal direction X from the leg end 8b.
- the waist end portion 8a and the leg end portion 8b constitute both end portions of the side joint portion 8 in the longitudinal direction X.
- the side joint portion 8 has a configuration extending in the longitudinal direction X from the waist end portion 8a to the leg end portion 8b as a whole.
- the longitudinal direction X end side means the side approaching the waist end portion 8a or the leg end portion 8b
- the longitudinal direction X central side means the waist end portion 8a or the leg end portion 8b.
- the side joint portion 8 further has a plurality of seal portions S.
- the seal portion S is a portion where the thermoplastic sheets 50 of both the ventral region 5a and the dorsal region 5b are fused and joined.
- the sealed portion S is bonded by, for example, pressurizing means and/or heating means, and specifically by heat sealing, ultrasonic sealing, or the like.
- the sealing portion S is thicker than the surroundings due to the fusion of the fibers 55 of the thermoplastic sheet 50. is observed as a thinned portion.
- the plurality of seal portions S are spaced apart in the vertical direction X. As shown in FIG. This can prevent the entire side joint portion 8 from peeling off along the vertical direction X when one seal portion S is peeled off.
- the planar shape of the seal portion S is not particularly limited, and may be a shape selected from a rectangular shape, other polygonal shapes, a circular shape, an elliptical shape, shapes similar thereto, and other shapes. As shown in FIG. 3, the planar shape of the seal portions S is preferably a rectangular shape from the viewpoint of securing a sufficient area for each seal portion S while leaving a space therebetween.
- the fingers of the disposal person are separated from the waist end 8a or the leg end 8b by about 25 mm to 30 mm in the longitudinal direction X. It is likely to be arranged on both the left and right sides (abdominal side and dorsal side) of the side joint portion 8 . For example, when the wearer is standing, the disposer's fingers are likely to be placed on the waist side, and when the wearer is lying down, the disposer's fingers are likely to be placed on the leg side.
- the region to which the external force for tearing (also referred to as "tearing force") is particularly likely to be applied is the waist end within 25 mm in the longitudinal direction X from the waist end 8a and the leg end 8b.
- Region 8c and leg end region 8d are defined.
- the arrangement and sealing strength of the seal portion S in the waist end region 8c and/or the leg end region 8d are adjusted. Configure as follows. Note that FIG. 3 shows an example in which the region where the seal portion S has a characteristic arrangement and seal strength is the waist end region 8c.
- At least one of the side joints 8 is each composed of a plurality of seals S spaced apart in the longitudinal direction X and aligned in the transverse direction Y in the waist end region 8c. has a plurality of seal rows SL.
- a plurality of seal portions S are aligned along the longitudinal direction X with a space therebetween means that a plurality of seal portions S spaced apart in the longitudinal direction X are arranged side by side on a straight line extending in the longitudinal direction X. means Specifically, in one seal row SL, it is preferable that the deviation of the straight line that bisects each seal portion S in the lateral direction Y is within 50% of the maximum dimension of the seal portion S in the lateral direction Y.
- the seal rows SL are arranged along the lateral direction Y means that a plurality of seal rows are aligned in the lateral direction Y, and the seal portions S belonging to the seal rows SL adjacent to each other in the lateral direction Y are arranged apart from each other. means to be In the present embodiment, at least a portion of the plurality of seal rows SL may be arranged in the waist end region 8c, and may extend in the longitudinal direction X from the waist end region 8c. In the example shown in FIG. 3 , a plurality of seal rows SL are arranged over the longitudinal direction X of the side joint portion 8 .
- seal rows SL are arranged in the waist end region 8c. These seal rows SL are also referred to as a first seal row SL1, a second seal row SL2, and a third seal row SL3 from the inner side to the outer side in the lateral direction Y. In the following description, when there is no need to distinguish these seal rows SL, they are simply referred to as seal rows SL. Note that the number of seal rows SL in the waist end region 8c is not limited to three. For example, the number of seal rows SL in the waist end region 8c is two or more, preferably three or more and seven or less.
- the seal portions S belonging to each seal line SL are spaced apart in the vertical direction X and the horizontal direction Y. As a result, when one seal portion S is peeled off during wearing and wearing operation, the influence thereof is less likely to propagate to the other seal portions S. Therefore, it is possible to effectively prevent the peeling of the side joints 8 during the wearing operation and wearing.
- a tearing force F having both longitudinal direction X central side and lateral direction Y outer components is applied from the inside of the waist end region 8c and/or the leg end region 8d.
- this tearing force F is an oblique outward force that is inclined by about 45° with respect to the longitudinal direction X and the lateral direction Y.
- the seal portion S extends from the seal portion S on the end side in the longitudinal direction X of the first seal row SL1 toward the center in the longitudinal direction X and from the inner side to the outer side in the lateral direction Y. torn apart in order.
- the exterior body 5 is broken at a portion adjacent to the seal portion S, and the breakage of the exterior body 5 progresses in the lateral direction Y outward along the longitudinal direction of the seal portion S, a so-called lateral joint. Cracking may occur. If the exterior body 5 is torn laterally, the tearing action is interrupted each time, which causes great stress to the disposal person and the wearer.
- the seal portion S positioned on the inner side in the lateral direction Y is the seal portion S located on the outer side in the lateral direction Y. It has lower seal strength than S.
- “Two seal portions S adjacent to each other in the horizontal direction Y” means one seal portion S when the position of each seal portion S that is divided into two equal parts in the horizontal direction Y and the vertical direction X is defined as the “central portion”, The other seal portion S having a center portion closest to the center portion of the seal portion S and two seal portions S are meant.
- at least the relationship between the seal strengths of two adjacent seal portions S should satisfy the above relationship.
- the seal strength of the seal portion S gradually increases from the inner seal row SL in the lateral direction Y toward the outer seal row SL.
- the seal strength of each seal portion S of the first seal row SL1 is lower than the seal strength of each seal portion S of the second seal row SL2.
- the seal strength of each seal portion S of the second seal row SL2 is lower than the seal strength of each seal portion S of the third seal row SL3. That is, the seal strength of the seal portion S increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
- seal strength refers to peel strength measured by a measuring device such as Tensilon.
- peel strength refers to the local peel strength measured by a measuring device such as Tensilon.
- joint strength refers to the strength of joint felt by the disposal person when the side joint portion 8 is torn.
- the seal strength of the seal portion S of the seal row SL (for example, the first seal row SL1) on the inner side in the lateral direction Y to which the tearing force F is applied first is low. This makes it easier for the person who disposes to easily tear the seal portion S at the beginning, and makes it difficult to apply a strong force to the side joint portion 8 .
- the seal strength of one seal portion S becomes lower than the seal strength of the other seal portion S.
- the total seal strength of the two seal portions S can be kept low compared to the case where all seal portions S have the same seal strength. Therefore, even in the middle of tearing, the tearing force F by the disposal person is less likely to increase, and the load on the exterior body 5 is reduced. As a result, tearing can be easily felt, and lateral tearing of the exterior body 5 can be prevented.
- the seal strength of the seal line SL (for example, the third seal line SL3) on the outer side in the lateral direction Y can be set high, it is possible to prevent peeling during wearing and wearing operation. Therefore, in the side joint portion 8 of the present embodiment, it is possible to achieve both the prevention of peeling during wearing and the wearing operation and the easiness of tearing during disposal.
- a method for measuring and comparing the seal strength of the seal portion S of each seal row SL will be described.
- First, at least one of the waist end region 8c and the leg end region 8d including a plurality of seal rows SL is cut into a rectangular shape having a length of 10 mm in the longitudinal direction X and a length including the full width of the side joint portion 8 in the lateral direction Y. to form a sample for measurement.
- the total width of the side joint portion 8 is the length from the outer side edge in the lateral direction Y of the side joint portion 8 to the inner end portion of the innermost laterally Y inner seal portion S in the lateral direction Y.
- the length of the measurement sample in the lateral direction Y is preferably 20 mm or more longer inward in the lateral direction Y than the entire width in order to secure a portion to be fixed to the tensilon.
- the plurality of cut out measurement samples are assumed to have the same laminated number of thermoplastic sheets 50 .
- the inner end portion of the measurement sample in the lateral direction Y is fixed to a Tensilon universal tester (RTC-1210A) manufactured by Orientec Co., Ltd., and one outer package 5 is separated from the other outer package 5 .
- the measurement sample is peeled from the inner side to the outer side in the lateral direction Y at a speed of 10 mm/min, and the peel strength is measured over time.
- FIG. 5 shows an example of a graph obtained by measuring seal strength as described above.
- the vertical axis indicates the seal strength (N)
- the horizontal axis indicates the distance from the peeling start point in the horizontal direction Y.
- a plurality of peak intensities A, B, and C can be confirmed corresponding to a plurality of seal rows SL.
- These peak strengths A, B, and C are the seal strengths of the seal portions S of each seal row SL arranged along the lateral direction Y from the inner side to the outer side.
- the seal portion S positioned inside in the lateral direction Y is greater than the seal portion S positioned outside in the lateral direction Y. are also determined to have low seal strength.
- the seal strength of the seal portion S of the seal row SL (for example, the first seal row SL1) on the innermost side in the lateral direction Y is preferably 0.1 N or more, more preferably 0.2 N, from the viewpoint of facilitating tearing during disposal. or more, preferably 2N or less, more preferably 1.8N or less.
- the seal strength of the seal portion S of the seal row SL on the outermost side in the lateral direction Y (for example, the third seal row SL3) is preferably 0.5 N or more, more preferably 0.5 N or more, from the viewpoint of preventing peeling during wearing and wearing. It is 0.7N or more, preferably 5N or less, more preferably 4N or less.
- the ratio is preferably 5% or more, more preferably 10% or more, and preferably 90% or less, more preferably 80% or less, from the viewpoint of achieving both peeling prevention and tearability.
- the seal strength of the seal portion S can be adjusted, for example, by changing conditions such as temperature, pressure and/or time during the sealing process for forming the seal portion S.
- the seal strength can be reduced by disposing a melting inhibitor between the thermoplastic sheets 50 to inhibit melting of the resin.
- Melting inhibitors include hot-melt adhesives, polyurethane-based materials, petroleum-based resins, and the like.
- the seal strength can also be adjusted by changing the area of the seal portion S, which is the fused portion of the fibers.
- the seal strength can also be adjusted by changing the fiber composition of the thermoplastic sheet 50 . Specific examples will be described below.
- the seal portion S is a portion formed by fusing fibers of a plurality of thermoplastic sheets 50 of the exterior body 5 . For this reason, in the sealing portion S in which the fibers are sufficiently melted, the fibers tend to adhere to each other after cooling, and the sealing strength tends to be high. Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent to each other in the horizontal direction Y, the seal portion S that is located inside in the horizontal direction Y has a higher fiber density than the seal portion S that is located outside in the horizontal direction Y. A low degree of melting is preferred.
- the degree of melting of the seal portions S increases from the seal row SL on the inner side in the lateral direction Y toward the seal row SL on the outer side.
- the melting degree of the fibers of the seal portion S increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
- the waist end region 8c and/or the leg end region 8d including the seal row SL of the side joint portion 8 are cut, and an XZ cross section of the seal portion S (a cross section crossing the seal portion S in the longitudinal direction X) is obtained.
- Prepare a sample for measurement containing The seal portions S to be measured are the seal portions S belonging to each seal line SL, and the seal portions S located in the region where the number of laminated thermoplastic sheets 50 is the same.
- the XZ cross section of the measurement sample is imaged with a scanning electron microscope (SEM) at a magnification of 500 times.
- SEM scanning electron microscope
- image analysis software is used to detect the outer edge of the fiber, and the length of the detected line is calculated as the perimeter of the fiber.
- the average value of the fiber perimeters calculated from five or more images is calculated, and the average value is taken as the fiber perimeter of the seal portion S of each seal row SL.
- the perimeters of the fibers of the seal portions S of the plurality of seal rows SL are compared, and it is determined that the longer the perimeter of the fiber, the lower the degree of melting.
- FIG. 6A shows an example of an enlarged view of the XZ cross section of the seal portion S belonging to the seal row SL on the inside in the lateral direction Y
- FIG. 6B shows an example of an enlarged view of the seal row SL on the outside in the lateral direction Y.
- An example of an enlarged view of the XZ cross section of the seal portion S is shown.
- the fiber 55 shown in FIG. 6(A) includes many irregularities on the outer edge 55a and has a long circumference. That is, the fibers 55 are not melted so much, and the original unevenness of the fibers 55 remains on the outer edge 55a which is the surface.
- the degree of melting of the fibers can be adjusted by conditions such as heat, pressure and/or time during the sealing process.
- the sealing strength can be adjusted without significantly changing the planar shape, arrangement, or thickness of the sealing portion S.
- the seal portions S can be torn one after another at substantially constant intervals when tearing. Therefore, the tearing operation can be stably and smoothly performed, and the stress of the disposal person can be reduced.
- the melting degree of the fibers can be changed without changing the composition of the fibers of the thermoplastic sheet 50 for each seal row SL. Thereby, the seal strength can be adjusted relatively easily and accurately.
- the seal portion S of the innermost seal row SL in the lateral direction Y (for example, the first seal row SL1) with respect to the fiber circumference of the seal portion S of the seal portion S in the outermost seal row SL in the lateral direction Y (for example, the third seal row SL3)
- the fiber perimeter ratio is preferably 105% or more, more preferably 110% or more, and preferably 300% or less, more preferably 200% or less.
- the seal portion S located inside in the lateral direction Y is configured to be thicker than the seal portion S located outside in the lateral direction Y.
- the thickness of the seal portion S decreases from the seal row SL on the inner side in the lateral direction Y toward the seal row SL on the outer side.
- the thickness of the seal portion S referred to here is the thickness along the thickness direction Z. As shown in FIG. For example, the thickness of the seal portion S decreases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
- the waist end region 8c and/or the leg end region 8d including the seal row SL of the side joint portion 8 are cut, and an XZ cross section of the seal portion S (a cross section crossing the seal portion S in the longitudinal direction X) is obtained.
- Prepare a sample for measurement containing The seal portions S to be measured are the seal portions S belonging to each seal line SL, and the seal portions S located in the region where the number of laminated thermoplastic sheets 50 is the same.
- the XZ cross section of the measurement sample is imaged by SEM or the like at a magnification of 500 times. Then, as shown in FIG.
- the recessed portion in the captured image is defined as the seal portion S.
- the thickness Ds (see FIG. 4) in the thickness direction Z of the portion that bisects the seal portion S in the width direction (longitudinal direction X) is calculated as the thickness of the seal portion S.
- an average value of the thickness of the seal portion S calculated from five or more images is calculated, and the average value is used as the thickness of the seal portion S of each seal line SL.
- the ratio of the thickness of the seal portion S of the innermost seal row SL (for example, the first seal row SL1) to the thickness of the seal portion S of the seal row SL that is the outermost in the transverse direction Y (for example, the third seal row SL3) is , preferably 102% or more, more preferably 104% or more, preferably 200% or less, more preferably 180% or less.
- the seal strength of the seal portion S can be adjusted by the area of the seal portion S as well. Specifically, the smaller the area of the seal portion S, the smaller the area of the fused portion of the fibers, and the lower the seal strength. Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S positioned inside in the lateral direction Y has a smaller area than the seal portion S positioned outside in the lateral direction Y. may have For example, the area of the seal portion S may increase from the inner seal row SL in the lateral direction Y toward the outer seal row SL.
- the area of the seal portion S referred to here is the area of one seal portion S in plan view.
- the seal portions S to be compared are the seal portions S belonging to each seal line SL of the waist end region 8c and/or the leg end region 8d. If the planar shapes of the seal portions S are different within the same seal line SL, the average area of any five seal portions S located in the end region to be measured within one seal line SL is The area of the seal portion S of the seal row.
- the area of the seal portion S preferably increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
- the seal strength of the seal portion S can be adjusted by changing the seal pattern without changing the conditions of the sealing process for each seal row SL. Therefore, the seal strength of the seal portion S within the first seal row SL1 on the inner side in the lateral direction Y can be reduced more stably.
- a large number of seal portions S are provided along the longitudinal direction X in the side joint portion 8 that is long in the longitudinal direction X. is preferably placed. For this reason, in the outer seal row SLb, it is preferable that the plurality of seal portions S are arranged in the vertical direction X at intervals of a second dimension D2 that is narrower than the first dimension D1. Since the width of the side joint portion 8 in the lateral direction Y is restricted to some extent, the first dimension D1 is also restricted accordingly.
- the distance between the outer seal rows SLb in the longitudinal direction X is set to a second dimension D2 narrower than the first dimension D1, thereby forming a seal portion S having a high seal strength along the longitudinal direction X.
- They can be arranged densely, and the joint strength of the side joints 8 can be sufficiently secured.
- an oblique force F including a component directed toward the center in the vertical direction X and a component directed toward the outer side in the horizontal direction Y is applied. Since the tear at the waist end region 8c or the leg end region 8d on the tear initiation side progresses along the direction of this force F, the peel interface moves along the direction orthogonal to this. That is, the separation interface is formed on the line L along the direction including the component toward the center in the vertical direction X and the component toward the inner side in the horizontal direction Y. The line L is inclined at approximately 45° with respect to the vertical direction X and the horizontal direction Y. As shown in FIG. As shown in FIG.
- the seal strength of the seal portions S of the inner seal row SLa is smaller than the seal strength of the seal portions S of the outer seal row SLb. Therefore, an increase in the total seal strength of the two seal portions S can be suppressed, and tearing can be performed with a weak force. In addition, it is possible to suppress the local application of a large force to the exterior body 5, and effectively prevent the exterior body 5 from being laterally torn.
- the plurality of seal portions S included in the plurality of seal rows SL are preferably aligned along the lateral direction Y.
- the seal portions S in at least one of the waist end region 8c and the leg end region 8d in which the seal rows SL are arranged may be arranged in a grid pattern aligned along the longitudinal direction X and the lateral direction Y.
- “A plurality of seal portions S are aligned along the horizontal direction Y” means that the plurality of seal portions S are aligned and arranged on a straight line extending in the horizontal direction Y. Specifically, it is preferable that the deviation of the straight line that bisects each seal portion S in the longitudinal direction X is within 50% of the dimension of the seal portion S in the longitudinal direction X.
- the seal portions S are regularly arranged, the seal strength may fluctuate regularly.
- the drag force that the disposal person receives during tearing tends to fluctuate regularly, and the disposal person can tear the sheet more smoothly and easily.
- a non-sealed portion is arranged around the seal portion S.
- the tearing operation tends to feel uncomfortable.
- at least one of the waist end region 8c and the leg end region 8d including the plurality of seal rows SL is 10 mm in the longitudinal direction X and the side joints 8 are 10 mm in the lateral direction Y.
- the minimum intensity between the plurality of peak intensities corresponding to the seal rows SL of 1 is greater than 0N.
- the method described in the above-described method for measuring seal strength can be used.
- the above configuration can be achieved by making the distance between the seal portions S in the lateral direction Y of the seal row SL shorter than the seal width of the seal portions S in the lateral direction Y.
- peak intensities A, B, and C corresponding respectively to the first seal row SL1, the second seal row SL2, and the third seal row SL3 are shown.
- the minimum intensity between peak intensities A and B be a.
- the minimum intensity between peak intensities B and C be b. That is, the minimum intensity b is the intensity measured outside the minimum intensity a in the lateral direction Y.
- the seal strength distribution obtained under the above measurement conditions approximates the seal strength distribution obtained when the side joint portion 8 is actually torn. Therefore, according to the above configuration, even when the side joint portion 8 is actually torn, it is possible to reduce the fluctuation of the drag force that the disposal person receives over time, and it is possible to obtain the side joint portion 8 that is easy to tear.
- three or more seal rows SL are arranged as a plurality of seal rows SL in at least one of the waist end region 8c or the leg end region 8d, and the seal strength was measured using the measurement sample described above.
- the minimum intensities between the three or more peak intensities preferably increase in order measured from the inside to the outside in the transverse direction Y.
- the peak intensity when three or more seal rows SL are arranged will be described.
- the seal strength of the seal portions S of these seal rows SL increases from the inner side to the outer side in the lateral direction Y.
- peak intensities A, B and C increase in this order.
- the disposal person can be guided to gradually apply force, and lateral tearing of the outer package 5 due to sudden application of a large force can be suppressed.
- a large force is not required at the start of tearing, even a disposer with weak force can easily tear. Therefore, it is possible to obtain the side joints 8 that are less likely to be laterally torn at the time of disposal and are easier to tear.
- the minimum strength when three or more seal rows SL are arranged will be described.
- the minimum intensity b between the peak intensities B and C is greater than the minimum intensity a between the peak intensities A and B.
- the peak intensities A, B, and C increase in this order, the difference between the minimum intensities a, b and the peak intensities B, C appearing next thereto is suppressed from increasing rapidly.
- the increase rate of the seal strength per unit length from the minimum strengths a and b to the peak strengths B and C appearing next can be suppressed more effectively. Therefore, according to the above configuration, even when the side joint portion 8 is actually torn, it is possible to further reduce the fluctuation of the drag force that the disposal person receives over time, and it is possible to obtain the side joint portion 8 that is easier to tear. can.
- the seal portion S can be arranged as follows.
- the fact that the minimum intensities a and b between the peak intensities A, B, and C are greater than 0 N means that when the measurement sample is peeled from the inner side in the lateral direction Y toward the outer side, the seal portion S on the inner side in the lateral direction Y is It means that peeling of the outer seal portion S is started before it is completely peeled off. Therefore, referring to FIG. 7, the lateral direction of the seal portion S of the inner seal row SLa is relative to the distance D3 in the lateral direction Y between the seal portion S of the outer seal row SLb and the adjacent seal portion S of the inner seal row SLa.
- the dimensional ratio in Y (D4/D3) is preferably 0.2 or more, more preferably 0.3 or more.
- the interval between the seal portions S of the seal lines SL adjacent to each other in the lateral direction Y is may be configured to decrease outwardly from the As a result, the width between peak intensities can be decreased from the inner side to the outer side in the lateral direction Y, making it easier to increase the minimum intensity.
- the dimensions of the seal portion S belonging to the seal line SL include the following examples from the viewpoint of achieving both the prevention of peeling during the wearing operation and wearing and the easiness of tearing. In addition, the following dimensions shall be measured in the natural state which is not extending
- the dimension (maximum dimension) of the seal portion S in the lateral direction Y is preferably 0.15 mm or more, more preferably 0.2 mm or more, and is preferably 7 mm or less, more preferably 5 mm or less.
- the pitch of the plurality of seal rows SL in the lateral direction Y is preferably 0.4 mm or more, more preferably 0.7 mm or more, and is preferably 7 mm or less, more preferably 4 mm or less.
- the pitch in the horizontal direction Y of the plurality of seal rows SL is the distance in the horizontal direction Y between the lines that bisect each seal portion S in the horizontal direction Y in the seal portions S adjacent to each other in the horizontal direction Y. means. If the pitch is not constant, the pitches in the lateral direction Y are measured at five locations, and the average value thereof is taken as the lateral Y pitch.
- the dimension (maximum dimension) in the longitudinal direction X of the seal portion S included in the seal row SL is preferably 0.1 m or more, more preferably 0.3 mm or more, and is preferably 2 mm or less, more preferably 0.6 mm. It is below.
- the pitch in the longitudinal direction X of the plurality of seal portions S included in the seal row SL is preferably 1.5 mm or more, more preferably 1.7 mm or more, and is preferably 5.0 mm or less, more preferably 4 mm or less. be.
- the pitch in the longitudinal direction X of the plurality of seal portions S means the distance in the longitudinal direction X between the lines dividing each seal portion S into two equal parts in the longitudinal direction X in the seal portions S adjacent to each other in the longitudinal direction X. If the pitch is not constant, the pitch in the vertical direction X is measured at five locations, and the average value thereof is taken as the pitch in the vertical direction X.
- the ventral region 5a and the dorsal region 5b of the armor 5 include a plurality of elastic members 10 extending in the horizontal direction Y.
- the plurality of elastic members 10 are arranged between the plurality of thermoplastic sheets 50 of the exterior body 5 (see FIG. 9). These elastic members 10 exhibit stretchability around the waist of the diaper 1, facilitate the wearing operation, and maintain the fit when worn.
- “the elastic member 10 extends in the lateral direction Y” means that the elastic member 10 extends in the lateral direction Y in the deployed and extended state.
- the above expression is not limited to a mode in which the elastic member 10 is parallel to the lateral direction Y in the deployed and stretched state, and includes a mode in which the elastic member 10 extends in the lateral direction Y as a whole.
- the outer body 5 may include leg elastic members 11 arranged around the leg openings 1L in addition to the elastic members 10 described above.
- the elastic members 10 and 11 preferably have a rectangular, square, circular, polygonal cross section, and are thread-like (string rubber, etc.) or string-like (flat rubber, etc.), or multi-filament type thread-like ones. can.
- the materials of the elastic members 10 and 11 can be those conventionally used in absorbent articles such as disposable diapers without particular limitation. EVA, elastic polyolefin, polyurethane and the like can be mentioned.
- the lateral Y outer end of the elastic member 10 of each of the ventral region 5a and the dorsal region 5b is preferably positioned at or near the side joint 8.
- the end preferably has a distance of 10 mm or less from the side joint 8 in the lateral direction Y, and the distance is 0 mm and the end is positioned inside the side joint 8. is more preferable.
- the elastic member 10 is generally arranged up to or near a region where force is applied during tearing, which tends to affect the ease of tearing during disposal.
- the elastic member is formed in a region including and not including the waist end region 8c. It is preferable to adjust the elongation rate as follows.
- the ventral region 5a and the dorsal region 5b respectively have a first stretchable region 5f and a second stretchable region 5g in which a plurality of elastic members 10 extending in the lateral direction Y are arranged.
- the first stretchable region 5f and the second stretchable region 5g each extend in the horizontal direction Y from one of the pair of side joints 8 to the other. That is, the first stretchable region 5f and the second stretchable region 5g extend over the entire width in the horizontal direction Y of the ventral region 5a and the dorsal region 5b.
- the first elastic region 5f extends in the lateral direction Y from the waist end region 8c.
- both lateral Y ends of the first stretchable region 5f are constituted by the waist end regions 8c.
- the second stretchable region 5g is adjacent to the first stretchable region 5f in the longitudinal direction X and extends in the lateral direction Y from the region of the side joint 8 excluding the waist end region 8c.
- the average stretch rate of the plurality of elastic members 10 in the first stretchable region 5f is preferably lower than the average stretch rate of the plurality of elastic members 10 in the second stretchable region 5g.
- the stretch ratio of the elastic member 10 means the ratio of the length of the elastic member stretched in the unfolded and stretched state of the pants-type absorbent article to the length of the elastic member in the natural length taken out from the pants-type absorbent article. . That is, the lower the elongation rate, the smaller the elastic force when the elastic member 10 is pulled.
- the extension rate of the elastic member 10 can be adjusted by adjusting the degree of extension of the elastic member 10 arranged on the exterior body 5 at the time of manufacturing. During manufacturing, for example, the elastic member 10 is stretched to a predetermined length, an adhesive is applied to the elastic member 10 with a comb or the like, and the elastic member 10 is fixed to the thermoplastic sheet 50 of the exterior body 5 .
- a force in the lateral direction Y can be directly applied to the waist end region 8c during the tearing operation, as described above.
- the elastic force of the elastic member 10 in the first elastic region 5f is low.
- the energy associated with the tearing force is less likely to be consumed by the elongation of the elastic member 10, and even a weaker force can efficiently tear. Therefore, with the above configuration, a stable tearing operation becomes possible, and troubles such as tearing of the exterior body 5 due to excessive tearing force can be prevented.
- ⁇ Method for measuring average elongation of elastic member The side joints 8 of the pants-type absorbent article are separated, the absorbent main body 4 is removed, and the ventral region 5a and the dorsal region 5b of the exterior body 5 are cut out. Furthermore, a position of 25 mm in the longitudinal direction X from the waist end 8a (waist opening end Wa) and/or the leg end 8b of the abdominal region 5a and the dorsal region 5b is cut parallel to the lateral direction Y, and the first stretching A region 5f and a second elastic region 5g are cut out. Then, the length of the elastic member 10 in each cut-out region is measured in the unfolded and stretched state of the pants-type absorbent article.
- the average value of the lengths of all the elastic members 10 in the maximum stretched state in each of the regions 5f and 5g is calculated. All the elastic members 10 fixed to the regions 5f and 5g by adhesive or the like are removed from the other constituent members of the exterior body 5 using a suitable solvent such as ethyl acetate, and the natural lengths of the regions 5f and 5g are removed. The length of elastic member 10 is measured. From this measured value, the average value of the lengths of all the natural lengths of the elastic members 10 in each of the regions 5f and 5g is calculated.
- the ratio of the average length of the elastic member 10 in the unfolded and stretched state to the average length of the elastic member 10 in the natural length is calculated. Let it be the average elongation rate of the elastic member 10 .
- the average stretch rate of the plurality of elastic members 10 in the first elastic region 5f is preferably 120% or more, more preferably 130% or more, and preferably 500% or less, more preferably 450% or less.
- the average stretch rate of the plurality of elastic members 10 in the second elastic region 5g is preferably 150% or more, more preferably 180% or more, and preferably 550% or less, more preferably 500% or less.
- the ratio of the average elongation rate of the plurality of elastic members 10 in the first elastic region 5f to the average elongation rate of the plurality of elastic members 10 in the second elastic region 5g is preferably 20 from the viewpoint of effectively obtaining the above effects. % or more, more preferably 30% or more, preferably 90% or less, more preferably 80% or less.
- the strength of the seal portion S is likely to be lowered at the position where the elastic member 10 and the seal portion S overlap each other in plan view.
- the hot-melt adhesive hinders the fusion of the seal portion S, and the strength of the seal portion S is likely to be further reduced.
- the pitch D5 of the plurality of elastic members 10 in the vertical direction X is the distance in the vertical direction X between the lines dividing each elastic member 10 into two equal parts in the vertical direction X in the elastic members 10 adjacent to each other in the vertical direction X. means.
- the pitches of the elastic member 10 and the seal portion S in the longitudinal direction X do not match, and it is possible to suppress their overlap in plan view. Furthermore, since the pitch D5 of the elastic member 10 in the longitudinal direction X is larger than the pitch D4 of the seal portions S in the longitudinal direction X, the pitch of the seal portions S is narrowed and the seal portions S are densely arranged in the longitudinal direction X. , and peeling of the side joint portion 8 can be suppressed. In addition, since the pitch of the elastic member 10 in the longitudinal direction X is not an integral multiple of the pitch of the seal portion S in the longitudinal direction X, it is possible to suppress the overlap in plan view, and the strength of the seal portion S caused by the elastic member 10. can be suppressed. Therefore, the strength of the seal portion S can be adjusted with high accuracy.
- the exterior body 5 preferably includes, for example, an outer layer sheet 51 and an inner layer sheet 52 as a plurality of thermoplastic sheets 50 .
- the outer layer sheet 51 is arranged on the non-skin side of the inner layer sheet 52 and forms the non-skin facing surface of the exterior body 5 .
- an elastic member 10 is arranged between the inner layer sheet 52 and the outer layer sheet 51 .
- at least part of the exterior body 5 is folded back from the waist opening end Wa toward the skin side, so that the exterior body 5 has a folded structure.
- only the outer layer sheet 51 is folded back from the waist end 8a to the skin side.
- the ventral region 5a and the dorsal region 5b of the side joint portion 8 are shown in a separated state.
- the side joint portion 8 has a plurality of regions in which the thermoplastic sheets 50 are laminated in different numbers due to the folded structure of the exterior body 5 . That is, in the present embodiment, the side joint portion 8 includes a first laminated portion T1 in which six or more thermoplastic sheets 50 are laminated, and a second laminated portion T1 in which a smaller number of thermoplastic sheets 50 than the first laminated portion T1 are laminated. 2 laminated portion T2. In the present embodiment, the first laminated portion T1 corresponds to a region where the exterior body 5 is folded back, and the waist end region 8c is arranged in the first laminated portion T1.
- the first laminated portion T1 includes, as the thermoplastic sheet 50, a first skin-side sheet P1 forming a skin-facing surface.
- the second laminated portion T2 includes, as the thermoplastic sheet 50, a second skin-side sheet P2 that constitutes the skin-facing surface.
- the first laminated portion T1 of the ventral region 5a is composed of three layers: an outer layer sheet 51 that is not folded back, an inner layer sheet 52 that is not folded back, and an outer layer sheet 51 that is folded back. be done.
- the first laminated portion T1 of the dorsal region 5b is also composed of the same three layers.
- the first laminated section T1 is composed of a total of six layers.
- the first skin side sheet P1 is composed of the outer layer sheet 51 folded back.
- the second laminated portion T2 of the ventral region 5a is composed of two layers, an outer layer sheet 51 that is not folded back and an inner layer sheet 52 that is not folded back.
- the second laminated portion T2 of the dorsal region 5b is also composed of two similar layers.
- the second lamination part T2 is composed of a total of four layers.
- the second skin side sheet P2 is composed of the inner layer sheet 52 that is not folded back.
- the number of laminated thermoplastic sheets 50 is larger in the first laminated portion T1 than in the second laminated portion T2, the amount of thermoplastic resin is also increased. Therefore, the first laminated portion T1 has a larger amount of heat-sealed resin than the second laminated portion T2, and the sealing strength of the seal portion S tends to be high. Therefore, by adjusting the pattern of the seal portion S of the first laminated portion T1 and the second laminated portion T2, the bonding strength between the first laminated portion T1 and the second laminated portion T2 is adjusted, and the tearing stability is improved. be able to.
- the side joint portion 8 has the first laminated portion T1 and the second laminated portion T2 and extends across the entire width of the side joint portion 8 in the horizontal direction Y and is adjacent to the side joint portion 8 in the longitudinal direction X. It is preferable to have one sealing area R1 and a second sealing area R2. As exemplified in FIGS. 10(A), (B) and FIGS. 11(A), (B), the first sealing region R1 and the second sealing region R2 are a plurality of seals having a regular planar shape and arrangement. Part S, respectively.
- At least one of the planar shape and arrangement of the plurality of seal portions S is different between the first seal region R1 and the second seal region R2.
- the plurality of seal portions S have a regular planar shape means that all the seal portions S within the region have substantially the same planar shape, or that the plurality of seal portions S have a plurality of types of planar shapes. It means at least one of having a shape and having seal portions S of different planar shapes arranged regularly.
- a plurality of seal portions S are regularly arranged means that the pitch of the seal portions S in the longitudinal direction X and the lateral direction Y is substantially the same, or that the pitch changes regularly. means at least one of
- the first seal area R1 and the second seal area R2 are ranges each having a certain seal pattern.
- the first seal region R1 extends in the longitudinal direction X from one end (for example, the waist end 8a) to the portion where the seal pattern is changed.
- the second seal region R2 extends in the longitudinal direction X from the other end (for example, the leg end 8b) to the portion where the seal pattern is changed.
- a boundary line Ra between the first seal area R1 and the second seal area R2 is a line that bisects the gap between the seal portions S that are adjacent in the longitudinal direction X at the boundary between the first seal area R1 and the second seal area R2.
- the boundary line Ra is defined as a curved line connecting the ends of a plurality of lines that divide the gap into two equal halves.
- the full width of the side joint portion 8 which is also the width of the first sealing region R1 and the second sealing region R2, extends from the outer edge of the side joint portion 8 in the horizontal direction Y to the innermost side in the horizontal direction Y of the side joint portion 8. The dimension in the horizontal direction Y to the inner end Sa of the seal portion S located.
- first laminated portion T1 is arranged in the first seal region R1.
- second laminated portion T2 is arranged in the second seal region R2.
- first seal region R1 is located on the waist end portion 8a side where the outer body 5 is folded back
- second seal region R2 is located on the leg end portion 8b side.
- the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is It is preferably smaller than the ratio of the total area of the plurality of seal portions S to the whole.
- the ratio of the total area of the plurality of seal portions S to the total area of each of the regions R1 and R2 is also referred to as "seal area ratio.”
- the boundary line Ra between the first sealing region R1 and the second sealing region R2 is often deviated from the boundary between the first laminated part T1 and the second laminated part T2 in terms of manufacturing.
- the first seal region R1 preferably extends from the first laminated portion T1 to part of the second laminated portion T2.
- a part of the first seal region R1 with a small seal area ratio be arranged in the second laminated portion T2 where the seal strength tends to be small.
- a region with a smaller seal strength is arranged near the boundary of the second laminated portion T2.
- the bonding strength between the first lamination part T1 and the second lamination part T2 does not suddenly increase, and it is possible to suppress the discomfort of the waste person due to the change in the number of lamination.
- the joint strength is lowered once, the disposal person can rest his/her hands in the middle of tearing, and the burden of tearing on the disposal person can be reduced. Therefore, the ease of tearing of the side joint portion 8 can be enhanced more effectively.
- the dimension D6 to the laterally Y outermost outer end Sb of the seal portion S thus formed is the laterally Y innermost inner end portion Sa of the laterally Y innermost seal portion S in the second seal region R2. to the laterally Y outermost outer end portion Sb of the seal portion S disposed most laterally Y outside.
- the dimensions D6 and D7 can be adjusted, for example, by the number of seal rows SL and/or the dimension of the seal portion S in the lateral direction Y, or the like.
- the plurality of seal rows SL are arranged in the first seal region R1 and the second seal region R2, and the seal lines in the first seal region R1 are arranged.
- the number of rows is preferably less than the number of seal rows in the second seal region R2.
- two seal rows SL are arranged in the first seal region R1 and three seal rows SL are arranged in the second seal region R2.
- the seal area ratio of the first seal region R1 which has a small number of seal rows, can be made smaller than the seal area ratio of the second seal region R2.
- the average area of the plurality of seal portions S in the first seal region R1 may be smaller than the average area of the plurality of seal portions S in the second seal region R2. preferable. This also makes it possible to make the seal area ratio of the first seal region R1, in which the average area of the plurality of seal portions S is small, smaller than the seal area ratio of the second seal region R2.
- the plurality of seal rows SL are arranged in the first seal region R1 and the second seal region R2, and the lateral direction Y of the seal portion S in the first seal region R1 is preferably wider than the pitch D9 in the lateral direction Y of the plurality of seal rows SL in the second seal region R2.
- the seal portions S in the first seal region R1 can be arranged more sparsely than the seal portions S in the second seal region R2. It can be smaller than the area ratio.
- the pitch D10 in the longitudinal direction X of the plurality of seal rows SL in the first sealing region R1 is equal to the pitch D11 in the longitudinal direction X of the plurality of seal rows SL in the second sealing region R2. is preferably wider than This also allows the seal portions S in the first seal region R1 to be arranged more sparsely than the seal portions S in the second seal region R2, and the seal area ratio of the first seal region R1 to that of the second seal region R2. It can be smaller than the seal area ratio.
- the first skin side sheet P1 and the second skin side sheet P2 having different configurations may be adopted. good.
- each of the first skin-side sheet P1 and the second skin-side sheet P2 may be made of a spunbond nonwoven fabric having a plurality of embossments.
- the embossments of the spunbond nonwoven fabric are the portions where the fibers are crimped and fused.
- the embossing is, for example, intermittently formed by thermocompression bonding using an embossing convex roll and a flat roll, etc., formed by ultrasonic fusion, or formed by intermittently applying hot air to partially fuse. etc. From the viewpoint of high productivity and low equipment cost, the embossing is preferably formed by thermocompression bonding.
- the planar shape of the embossing may take any shape such as circular, elliptical, polygonal, or similar shapes.
- the embossing is preferably formed in a regular pattern, but may be formed in a random pattern.
- the fibers are likely to break due to heat treatment and/or processing during formation, so when the embossing overlaps with the embossing of the seal portion S, the seal strength may decrease.
- the first skin-side sheet P1 and the second skin-side sheet P2 have different embossed area ratios, that is, the ratio of the total area of the regions occupied by a plurality of embossings in the predetermined region to the total area of the predetermined region. It is preferably composed of a spunbond nonwoven fabric. Specifically, the first skin-side sheet P1 preferably has a higher embossed area ratio than the second skin-side sheet P2.
- the embossed area ratio in the spunbond nonwoven fabric is measured in a region containing a sufficiently large number of embossments, and can be measured in a 20 mm ⁇ 20 mm square region of the spunbond nonwoven fabric, for example.
- the area occupied by each embossment can be recognized as a series of areas where thermal fusion of the fibers is observed.
- the measurement of the above-mentioned area ratio shall be performed in the unfolded and stretched state.
- the seal strength may be reduced in the seal portion S that overlaps the embossment. Therefore, by increasing the embossed area ratio in the first laminated portion T1 having a large number of laminated layers, the seal portion S and the embossed portions are more easily overlapped in the first laminated portion T1, and an increase in the seal strength can be suppressed. . As a result, the difference in joint strength between the first laminated portion T1 and the second laminated portion T2 can be reduced, and the joint strength of the entire side joint portion 8 can be further stabilized. Therefore, the tearing stability of the side joint portion 8 can be enhanced.
- the embossed area ratio of the first skin side sheet P1 is preferably 5% or more, more preferably 7% or more, and preferably 20% or less, more preferably 17% or less.
- the embossed area ratio of the second skin side sheet P2 is preferably 3% or more, more preferably 5% or more, and preferably 17% or less, more preferably 15% or less.
- the melting point of the first skin side sheet P1 is preferably higher than the melting point of the second skin side sheet P2.
- the thermoplastic sheet 50 with a high melting point is less likely to be heat-sealed than the thermoplastic sheet 50 with a low melting point when the sealing process is performed under the same conditions, and the sealing strength tends to decrease. Therefore, by increasing the melting point of the first skin-side sheet P1 in the first laminated portion T1 having a large number of laminated layers, it is possible to suppress an increase in the seal strength of the seal portion S of the first laminated portion T1. As a result, the difference in joint strength between the first laminated portion T1 and the second laminated portion T2 can be reduced, and the joint strength of the entire side joint portion 8 can be further stabilized. Therefore, the ease of tearing the side joint portion 8 can be enhanced.
- the melting point of the first skin side sheet P1 is preferably 125° C. or higher, more preferably 155° C. or higher, and preferably 260° C. or lower, more preferably 250° C. or lower.
- the melting point of the second skin side sheet P2 is preferably 123° C. or higher, more preferably 125° C. or higher, and preferably 180° C. or lower, more preferably 170° C. or lower.
- the basis weight of the first skin-side sheet P1 is preferably lower than the basis weight of the second skin-side sheet P2.
- the amount of thermoplastic resin is also large, and the seal strength of the seal portion S tends to be high. Therefore, in the first laminated portion T1 having a large number of laminated layers, by reducing the basis weight of the first skin-side sheet P1, it is possible to suppress an increase in the seal strength of the seal portion S of the first laminated portion T1. .
- the difference in joint strength between the first laminated portion T1 and the second laminated portion T2 can be reduced, and the joint strength of the entire side joint portion 8 can be further stabilized. Therefore, the tearing stability of the side joint portion 8 can be enhanced.
- the basis weight of the first skin side sheet P1 is preferably 10 g/m 2 or more, more preferably 12 g/m 2 or more, and preferably 30 g/m 2 or less, more preferably 25 g/m 2 or less.
- the basis weight of the second skin side sheet P2 is preferably 12 g/m 2 or more, more preferably 14 g/m 2 or more, and preferably 40 g/m 2 or less, more preferably 30 g/m 2 or less.
- the plurality of seal portions S are arranged in a grid pattern along the vertical direction X and the horizontal direction Y, but the present invention is not limited to this.
- the plurality of seal portions S of one seal row SL are aligned with the plurality of seal portions S of the other seal row SL in the longitudinal direction X. may be displaced from each other.
- the seal portion S that is positioned on the inner side in the lateral direction Y is larger than the seal portion S that is positioned on the outer side in the lateral direction Y. It has low seal strength. As a result, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
- the pitch in the longitudinal direction X of the seal portions S of each seal row SL is constant in at least one of the waist end region 8c and the leg end region 8d.
- the plurality of seal portions S have the same pitch in the longitudinal direction X in two seal rows SL adjacent to each other in the lateral direction Y.
- the displacement in the vertical direction X between the seal portions S of one seal row SL and the seal portions S of the other seal row SL is more preferably 1/2 of the pitch.
- the outer layer sheet 51 and the inner layer sheet 52 are folded back from the waist opening end Wa toward the skin side.
- the leg-side ends of the outer layer sheet 51 and the inner layer sheet 52 in the folded region are arranged at substantially the same position in the longitudinal direction X. As shown in FIG.
- two seal portions belonging to different seal rows SL and adjacent to each other in the lateral direction Y are provided in at least one of the waist end region 8c and the leg end region 8d.
- the seal portion S located on the inner side in the lateral direction Y has a lower seal strength than the seal portion S located on the outer side in the lateral direction Y.
- the side joint portion 8 includes a first laminated portion T1 in which six or more thermoplastic sheets 50 including the first skin side sheet P1 are laminated, and a second skin side sheet P2. and a second laminated portion T2 in which thermoplastic sheets 50 are laminated in a number smaller than that of the first laminated portion T1.
- the first laminated portion T1 corresponds to a region where the exterior body 5 is folded back.
- the first laminated portion T1 of the ventral region 5a includes an outer layer sheet 51 that is not folded, an inner layer sheet 52 that is not folded, an inner layer sheet 52 that is folded, and an outer layer sheet that is folded. 51 and 4 layers.
- the first laminated portion T1 of the dorsal region 5b is also composed of the same four layers.
- the first laminated section T1 is composed of eight layers in total.
- the first skin side sheet P1 is composed of the outer layer sheet 51 folded back.
- the second laminated portion T2 of the ventral region 5a is composed of two layers, an outer layer sheet 51 that is not folded back and an inner layer sheet 52 that is not folded back.
- the second laminated portion T2 of the dorsal region 5b is also composed of two similar layers.
- the second lamination part T2 is composed of a total of four layers.
- the second skin side sheet P2 is composed of the inner layer sheet 52 that is not folded back.
- the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is calculated as follows: is preferably smaller than the ratio of the total area of
- the first skin-side sheet P1 and the second skin-side sheet P2 may be configured as described in the section "Configuration Example of the Skin-Side Sheets in the First Laminated Part and the Second Laminated Part" of the first embodiment. can. As a result, the joint strength of the entire side joint portion 8 can be further stabilized.
- the configuration of the exterior body 5 having the folded structure is not limited to the above example.
- the positions of the folded end portion 51a, which is the end portion of the folded region of the outer layer sheet 51, and the folded end portion 52a, which is the end portion of the folded region of the inner layer sheet 52 may differ in the longitudinal direction X.
- the folded end portion 52 a of the inner layer sheet 52 is positioned closer to the waist in the longitudinal direction X than the folded end portion 51 a of the outer layer sheet 51 .
- both the outer layer sheet 51 and the inner layer sheet 52 are folded back in the waist end region 8c.
- two seal portions belonging to different seal rows SL and adjacent to each other in the lateral direction Y are provided in at least one of the waist end region 8c and the leg end region 8d.
- the seal portion S located on the inner side in the lateral direction Y has a lower seal strength than the seal portion S located on the outer side in the lateral direction Y.
- the side joint portion 8 includes a first laminated portion T1 in which six or more thermoplastic sheets 50 including the first skin side sheet P1 are laminated, and a first laminated portion including the second skin side sheet P2. and a second laminated portion T2 in which thermoplastic sheets 50 are laminated in a number smaller than that of the portion T1.
- the first laminated portion T1 corresponds to a region where the exterior body 5 is folded.
- the first laminated portion T1 includes regions in which the thermoplastic sheets 50 are laminated in different numbers.
- the first laminated portion T1 includes a leg-side laminated portion T12 adjacent to the second laminated portion T2 and having more thermoplastic sheets 50 laminated than the second laminated portion T2, and a leg-side laminated portion T12 having more thermoplastic sheets 50 than the leg-side laminated portion T12. and a waist side laminated portion T11 in which a number of thermoplastic sheets 50 are laminated.
- the waist end region 8c is included in the waist side laminated portion T11.
- the waist-side laminated portion T11 of the ventral region 5a includes an unfolded outer layer sheet 51, an unfolded inner layer sheet 52, a folded inner layer sheet 52, and a folded outer layer sheet. 51 and 4 layers.
- the waist-side laminated portion T11 of the back region 5b is also composed of the same four layers.
- the waist-side laminated portion T11 is composed of a total of eight layers.
- the leg-side laminated portion T12 of the ventral region 5a is composed of three layers: an outer layer sheet 51 that is not folded back, an inner layer sheet 52 that is not folded back, and an outer layer sheet 51 that is folded back.
- the leg-side laminated portion T12 of the dorsal region 5b is also composed of the same three layers.
- the leg-side laminated portion T12 is composed of a total of six layers.
- the first skin-side sheet P1 is composed of the outer layer sheet 51 folded back.
- the second laminated portion T2 of the ventral region 5a is composed of two layers, an outer layer sheet 51 that is not folded back and an inner layer sheet 52 that is not folded back.
- the second laminated portion T2 of the dorsal region 5b is also composed of two similar layers.
- the second lamination part T2 is composed of a total of four layers.
- the second skin side sheet P2 is composed of the inner layer sheet 52 that is not folded back.
- the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is calculated as follows: is preferably smaller than the ratio of the total area of Furthermore, in the first seal region R1, the ratio of the total area of the plurality of seal portions S to the total area of the waist-side laminated portion T11 is calculated as the total area of the plurality of seal portions S to the total area of the leg-side laminated portion T12. is preferably smaller than the ratio of
- the first skin-side sheet P1 and the second skin-side sheet P2 may be configured as described in the section "Configuration example of the skin-side sheet in the first laminated portion and the second laminated portion" of the first embodiment. can. As a result, the joint strength of the entire side joint portion 8 can be further stabilized.
- the exterior body 5 may not have a folded structure.
- both the outer layer sheet 51 and the inner layer sheet 52 may not be folded back, and the edges of these sheets may coincide with the waist opening edge Wa. That is, in this example, the exterior body 5 as a whole is composed of the same number of laminations, and for example, the ventral region 5a and the dorsal region 5b are composed of two layers, the outer layer sheet 51 and the inner layer sheet 52, respectively. That is, in the entire side joint portion 8, the inner layer sheet 52 serves as the skin-side sheet P forming the skin-facing surface.
- two seal portions belonging to different seal rows SL and adjacent to each other in the lateral direction Y are provided in at least one of the waist end region 8c and the leg end region 8d.
- the seal portion S located on the inner side in the lateral direction Y has a lower seal strength than the seal portion S located on the outer side in the lateral direction Y.
- the skin-side sheet P is preferably made of the same nonwoven fabric over the entire side joints 8 from the viewpoint of further stabilizing the joint strength in the entire side joints 8 .
- the skin-side sheet P is preferably composed of a spunbond nonwoven fabric including a plurality of embossments, and the distance between the embossments is preferably substantially constant throughout the side joints 8 .
- the distance between embossments is substantially constant means that when the shortest distance between 10 or more embossments is compared, the smallest distance is 100%, and the largest distance is 110% or less. means it fits.
- the melting point of the skin-side sheet P is preferably substantially constant throughout the side joint portion 8 .
- the melting point of the skin side sheet P is substantially constant in the entire side joint portion 8 means that when the melting points of the skin side sheet P at 10 or more locations in the side joint portion 8 are compared, the lowest melting point is set to 100. %, the highest melting point is 110% or less.
- the basis weight of the skin-side sheet P is preferably substantially constant throughout the side joints 8 .
- the basis weight of the skin-side sheet P is substantially constant over the entire side joint portion 8 means that the basis weight of the skin-side sheet P at 10 or more locations in the side joint portion 8 is the lowest basis weight. When the amount is 100%, it means that the highest basis weight falls within 110% or less.
- the seal line SL is arranged in the waist end region 8c in the first embodiment, the seal line SL may be arranged in the leg end region 8d as shown in FIG. As a result, even when the wearer is lying down and the disposal person tears the side joint portion 8 from the leg end portion 8b, the ease of tearing described above can be realized.
- the seal line SL includes a waist end region 8c within 25 mm in the longitudinal direction X from the waist end 8a and a leg end region 8d within 25 mm in the longitudinal direction X from the leg end 8b. It may be a combined area. As a result, even when the disposal person tears the side joints 8 from either the waist end 8a or the leg end 8b, the ease of tearing described above can be realized.
- the seal strengths of all the seal portions S in one seal row SL are It does not have to be lower than the seal strength of all the seal portions S of the seal row SL located.
- the pair of side joints 8 have the same configuration, but only one side joint 8 may have the above-described plurality of seal rows SL.
- the outer body 5 has the ventral area 5a, the dorsal area 5b, and the crotch area 5c, but it is not limited to this.
- the outer body 5 may have a configuration in which an abdominal region and a dorsal region are divided without having a crotch region.
- the pants-type absorbent article according to the present invention does not have to be a disposable diaper for infants, and may be a disposable diaper for adults or children, for example. Furthermore, the pants-type absorbent article according to the present invention does not have to be a disposable diaper as long as it is an absorbent article of the type worn on the lower half of the body.
- Such pants-type absorbent articles include, for example, pants-type sanitary napkins.
- the present invention further discloses the following pants-type absorbent article.
- ⁇ 1> a longitudinal direction extending from the abdomen of the wearer through the crotch to the dorsal side; and a lateral direction orthogonal to the longitudinal direction and corresponding to the lateral direction of the wearer;
- a pants-type absorbent article comprising a body and a pair of side joints that join the ventral region and the dorsal region of the outer body at the lateral side edges,
- the pair of side joints are a waist edge region within 25 mm in the longitudinal direction from the waist edge, which is the waist-side edge in the longitudinal direction; a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction;
- At least one of the pair of side joints a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have Of the two laterally adjacent seal portions belonging to different seal rows, the laterally inner seal portion has a lower seal strength than the laterally outer seal portion.
- the seal portion located on the inner side in the lateral direction has a lower degree of melting of the fibers than the seal portion located on the outer side in the lateral direction
- the pants-type absorbent article according to 1. ⁇ 3> ⁇ 1> or ⁇ , of two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion positioned on the inner side in the lateral direction is configured to be thicker than the seal portion positioned on the outer side in the lateral direction. 2>, the pants-type absorbent article.
- the seal portion that is positioned on the inner side in the lateral direction has a smaller area than the seal portion that is positioned on the outer side in the lateral direction ⁇ 1> to ⁇ 3>, the underpants-type absorbent article.
- the outermost seal row in the lateral direction is the outer seal row
- the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row
- the lateral distance between the laterally outer outer ends of the seal portions of the outer seal row and the laterally inner inner ends of the seal portions of the inner seal row is a first dimension.
- At least one of the waist end region and the leg end region including the plurality of seal rows is cut into a rectangular shape with a length of 10 mm in the vertical direction and a length including the full width of the side joint in the horizontal direction.
- a sample for measurement is formed, and the seal strength is measured by peeling the measurement sample from the inner side to the outer side in the lateral direction at a speed of 10 mm / min.
- the underpants-type absorbent article according to any one of ⁇ 1> to ⁇ 6>, wherein a minimum strength between peak strengths corresponding to the plurality of seal rows is greater than 0N.
- three or more seal rows are arranged as the plurality of seal rows in at least one of the waist end region and the leg end region; when the seal strength of at least one of the waist end region and the leg end region including the three or more seal rows is measured, three or more peak strengths corresponding to the three or more seal rows are measured;
- the ratio of the lateral dimension of the seal portion of the inner seal row to the lateral distance between the seal portion of the outer seal row and the seal portion of the inner seal row is preferably 0.2.
- ⁇ 11> The underpants-type absorbent article according to any one of ⁇ 1> to ⁇ 10>, wherein a pitch of the plurality of seal rows in the horizontal direction is 4 mm or more.
- ⁇ 12> The underpants-type absorbent article according to any one of ⁇ 1> to ⁇ 11>, wherein a pitch of the plurality of seal portions in the vertical direction is 1.5 mm or more and 5.0 mm or less.
- a plurality of elastic members extending in the lateral direction are arranged and have a first stretchable region and a second stretchable region extending in the lateral direction from one to the other of the pair of side joints, the first elastic region extends in the lateral direction from the waist end region; the second stretchable region is adjacent to the first stretchable region in the longitudinal direction and extends in the lateral direction from a region of the side joints excluding the waist end region; According to any one of ⁇ 1> to ⁇ 12>, the average elongation rate of the plurality of elastic members in the first elastic region is lower than the average elongation rate of the plurality of elastic members in the second elastic region.
- a pants-type absorbent article is arranged and have a first stretchable region and a second stretchable region extending in the lateral direction from one to the other of the pair of side joints, the first elastic region extends in the lateral direction from the waist end region; the second stretchable region is adjacent to the first stretchable region in the longitudinal direction and extends in the lateral direction from
- the ventral region and the dorsal region each have a plurality of elastic members extending in the lateral direction from one of the pair of side joints to the other;
- the pitch of the plurality of elastic members in the longitudinal direction at the side joint portion is larger than the pitch of the plurality of seal portions in the longitudinal direction, and is an integral multiple of the pitch of the plurality of seal portions in the longitudinal direction.
- the side joints are a first sealing area and a second sealing area each including a plurality of sealing portions each having a regular planar shape and arrangement, extending across the entire width of the side joint portion in the lateral direction and adjacent to the longitudinal direction; a first laminated portion in which six or more thermoplastic sheets are laminated and at least a portion of which is arranged in the first seal region; a second laminated portion in which the thermoplastic sheets are laminated in a number smaller than that of the first laminated portion, and at least a portion of which is arranged in the second seal region; At least one of planar shape or arrangement of the plurality of seal portions differs between the first seal region and the second seal region, The ratio of the total area of the plurality of seal portions included in the first seal region to the entire area of the first seal region is the ratio of the total area of the plurality of seal portions included in the second seal region to the entire area of the second seal region.
- the pants-type absorbent article according to any one of ⁇ 1> to ⁇ 14>.
- ⁇ 16> In the first seal region, from the laterally inner inner end portion of the seal portion that is disposed most laterally inward, the laterally outer side of the seal portion that is disposed most laterally outward The dimension to the end is the distance from the laterally inner inner end of the laterally innermost seal portion to the laterally outermost seal portion in the second seal region.
- the underpants-type absorbent article according to ⁇ 15> which is smaller than the dimension to the laterally outer outer end.
- the plurality of seal rows are arranged in the first seal area and the second seal area
- the pants-type absorbent article according to ⁇ 15> or ⁇ 16>, wherein the number of seal rows in the first seal region is smaller than the number of seal rows in the second seal region.
- ⁇ 18> The underpants type according to any one of ⁇ 15> to ⁇ 17>, wherein the average area of the plurality of seal portions in the first seal region is smaller than the average area of the plurality of seal portions in the second seal region absorbent article.
- the side joints are a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated; a second laminated portion including a second skin-side sheet forming a skin-facing surface and having a smaller number of thermoplastic sheets laminated than the first laminated portion;
- the first skin-side sheet and the second skin-side sheet are each composed of a spunbond nonwoven fabric containing a plurality of embossments,
- the underpants-type absorbent article according to any one of ⁇ 1> to ⁇ 21>, wherein the embossed area ratio of the first skin-side sheet is higher than the embossed area ratio of the second skin-side sheet.
- the side joints are a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated; a second laminated portion including a second skin-side sheet that forms a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
- the underpants-type absorbent article according to any one of ⁇ 1> to ⁇ 22>, wherein the melting point of the first skin-side sheet is higher than the melting point of the second skin-side sheet.
- the side joints are a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated; a second laminated portion including a second skin-side sheet that forms a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
- the pants-type absorbent article according to any one of ⁇ 1> to ⁇ 23>, wherein the basis weight of the first skin-side sheet is lower than the basis weight of the second skin-side sheet.
- Pants-type absorbent article (disposable diaper, diaper) 4 Absorbent body 5 Exterior body 5a Abdominal region 5b Back region 50 Thermoplastic sheet 8 Side joint 8a Waist end 8b Leg end 8c Waist end region 8d Leg end Area S... Seal part SL... Seal row
- underpants-type absorbent article of the present invention it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
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Abstract
This underpants-type absorbent article comprises an absorbent main body, an exterior body, and a pair of side joining parts. The pair of side joining parts join an abdomen-side region and a back-side region of the exterior body at a horizontal-direction lateral edge orthogonal to the vertical direction. The side joining parts have a waist-end region and a leg-end region, and a plurality of seal rows formed by a plurality of seal parts arrayed separated along the vertical direction, the seal rows being separated from each other in the horizontal direction and disposed in at least one end region. The seal parts positioned on the inner side in the horizontal direction have a lower seal strength than the seal parts positioned on the outer side in the horizontal direction.
Description
本発明は、使い捨ておむつ等のパンツ型吸収性物品に関する。
The present invention relates to pants-type absorbent articles such as disposable diapers.
パンツ型吸収性物品は、一般に、吸収性本体と、外装体と、腹側の外装体と背側の外装体とを側端部で接合するサイド接合部(サイドシール部)と、を備えている。腹側の外装体と背側の外装体とがサイド接合部によって接合されることで、パンツ型吸収性物品のウエスト開口部及びレッグ開口部が形成される。
Pants-type absorbent articles generally include an absorbent main body, an outer body, and side joints (side seal parts) that join the abdominal outer body and the dorsal outer body at side ends. there is The waist opening and the leg opening of the pants-type absorbent article are formed by joining the outer covering body on the abdomen side and the outer covering body on the back side by the side joints.
特許文献1には、左右方向に間隔をおいて設けられた複数のエンボス列によって形成された主接合領域と副接合領域とを有する一対のサイドシール部を備えたパンツ型使い捨ておむつが開示されている。主接合領域は、前身頃と後身頃とを結着させる。副接合領域は、前身頃と後身頃とが解放されることを防止する観点から、主接合領域よりも左右方向外側に位置し、主接合領域よりも接合強度が弱くなるように形成されている。
Patent Document 1 discloses a pants-type disposable diaper provided with a pair of side seal portions having a main joint region and a sub-joint region formed by a plurality of embossed rows spaced apart in the left-right direction. there is The main joining region joins the front body and the back body. From the viewpoint of preventing the front body and the back body from being released, the secondary joint area is positioned laterally outside the main joint area and is formed so that the joint strength is weaker than that of the main joint area. .
本発明の一形態に係るパンツ型吸収性物品は、着用者の腹側から股間部を通って背側に延びる縦方向と、前記縦方向に直交し着用者の左右方向に対応する横方向と、を備え、かつ、吸収性本体と、外装体と、一対のサイド接合部と、を備える。
前記外装体は、前記吸収性本体の非肌対向面側に配置され、前記縦方向の両側に位置する腹側領域及び背側領域を含み、複数の熱可塑性シートが積層されて構成される。
前記一対のサイド接合部は、前記外装体の前記腹側領域と前記背側領域とを、前記横方向の側縁部において接合する。
前記一対のサイド接合部は、
前記縦方向におけるウエスト側の端部であるウエスト端部から前記縦方向に25mm以内の端部領域と、
前記縦方向におけるレッグ側の端部であるレッグ端部から前記縦方向に25mm以内のレッグ端部領域と、をそれぞれ有する。
前記一対のサイド接合部の少なくとも一方は、
前記縦方向に沿って離間して整列した複数のシール部でそれぞれ構成され、前記横方向に沿って前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方に配列された複数のシール列をさらに有する。
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、低いシール強度を有する。 The pants-type absorbent article according to one aspect of the present invention has a longitudinal direction extending from the wearer's abdomen through the crotch to the dorsal side, and a lateral direction perpendicular to the longitudinal direction and corresponding to the lateral direction of the wearer. and comprising an absorbent body, an outer body, and a pair of side joints.
The outer body is arranged on the non-skin-facing side of the absorbent main body, includes a ventral region and a dorsal region located on both sides in the longitudinal direction, and is constructed by laminating a plurality of thermoplastic sheets.
The pair of side joints joins the ventral region and the dorsal region of the exterior body at the side edges in the horizontal direction.
The pair of side joints are
an end region within 25 mm in the longitudinal direction from the waist end, which is the end on the waist side in the longitudinal direction;
and a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction.
At least one of the pair of side joints,
a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have.
Of the two laterally adjacent seal portions belonging to different seal rows, the laterally inner seal portion has a lower seal strength than the laterally outer seal portion.
前記外装体は、前記吸収性本体の非肌対向面側に配置され、前記縦方向の両側に位置する腹側領域及び背側領域を含み、複数の熱可塑性シートが積層されて構成される。
前記一対のサイド接合部は、前記外装体の前記腹側領域と前記背側領域とを、前記横方向の側縁部において接合する。
前記一対のサイド接合部は、
前記縦方向におけるウエスト側の端部であるウエスト端部から前記縦方向に25mm以内の端部領域と、
前記縦方向におけるレッグ側の端部であるレッグ端部から前記縦方向に25mm以内のレッグ端部領域と、をそれぞれ有する。
前記一対のサイド接合部の少なくとも一方は、
前記縦方向に沿って離間して整列した複数のシール部でそれぞれ構成され、前記横方向に沿って前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方に配列された複数のシール列をさらに有する。
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、低いシール強度を有する。 The pants-type absorbent article according to one aspect of the present invention has a longitudinal direction extending from the wearer's abdomen through the crotch to the dorsal side, and a lateral direction perpendicular to the longitudinal direction and corresponding to the lateral direction of the wearer. and comprising an absorbent body, an outer body, and a pair of side joints.
The outer body is arranged on the non-skin-facing side of the absorbent main body, includes a ventral region and a dorsal region located on both sides in the longitudinal direction, and is constructed by laminating a plurality of thermoplastic sheets.
The pair of side joints joins the ventral region and the dorsal region of the exterior body at the side edges in the horizontal direction.
The pair of side joints are
an end region within 25 mm in the longitudinal direction from the waist end, which is the end on the waist side in the longitudinal direction;
and a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction.
At least one of the pair of side joints,
a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have.
Of the two laterally adjacent seal portions belonging to different seal rows, the laterally inner seal portion has a lower seal strength than the laterally outer seal portion.
パンツ型吸収性物品の着用後には、衛生上の観点等から、サイド接合部を引き裂いて廃棄することがある。このため、サイド接合部は、着用動作時(パンツ型吸収性物品を履かせる際)及び着用時には剥がれることがなく、廃棄時には容易に引き裂くことができる機能が求められている。
一方で、特許文献1に記載のパンツ型使い捨ておむつは、サイドシール部の引き裂きに強い力を要し、サイドシール部を容易に引き裂くことができなかった。 After wearing the pants-type absorbent article, the side joints are sometimes torn and discarded from the viewpoint of hygiene. Therefore, the side joints are required to have the function of not being peeled off during the wearing operation (when putting on the underpants-type absorbent article) and during wearing, and being able to be easily torn off at the time of disposal.
On the other hand, the underpants-type disposable diaper described inPatent Document 1 required a strong force to tear the side seal portions, and the side seal portions could not be easily torn.
一方で、特許文献1に記載のパンツ型使い捨ておむつは、サイドシール部の引き裂きに強い力を要し、サイドシール部を容易に引き裂くことができなかった。 After wearing the pants-type absorbent article, the side joints are sometimes torn and discarded from the viewpoint of hygiene. Therefore, the side joints are required to have the function of not being peeled off during the wearing operation (when putting on the underpants-type absorbent article) and during wearing, and being able to be easily torn off at the time of disposal.
On the other hand, the underpants-type disposable diaper described in
本発明は、着用動作時及び着用時の剥がれ防止と、廃棄時の引き裂き容易性とを両立させることが可能なパンツ型吸収性物品の提供に関する。
The present invention relates to the provision of a pants-type absorbent article that can achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
以下、図面を参照しながら、本発明の実施形態を説明する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<第1実施形態>
[パンツ型使い捨ておむつの全体構成]
図1及び図2には、本発明の第1実施形態に係るパンツ型吸収性物品として、パンツ型使い捨ておむつ1が示されている。パンツ型使い捨ておむつ1は、以下、おむつ1と称する。
図1に示すように、おむつ1は、ウエスト開口部1W及び一対のレッグ開口部1Lを備え、着用時に、着用者の胴回り及び股間部に着用される。ウエスト開口部1Wは、ウエスト開口端Waを有する。おむつ1は、縦方向X、横方向Yを有する。縦方向Xは、着用者の腹側から股間部を通って背側に延びる。横方向Yは、縦方向Xに直交し、着用者の左右方向に対応する。さらに、図2等に示すように、おむつ1の縦方向X及び横方向Yに直交する方向を、厚み方向Zとする。
本明細書において、「ウエスト側」とは、縦方向Xにおいて、ウエスト開口部1Wのウエスト開口端Waに近づく側を意味し、「レッグ側」とは、縦方向Xにおいて、ウエスト開口端Waから遠ざかる側を意味する。
本明細書において、「横方向Y内側」とは、横方向Yにおいて、パンツ型吸収性物品(おむつ1)を横方向Yに2等分する縦中心線CLに近づく側を意味し、「横方向Y外側」とは、縦中心線CLから遠ざかる側を意味する。
本明細書では、厚み方向Zに関しては、パンツ型吸収性物品(おむつ1)の着用時において着用者の肌に近い側を肌側、着衣に近い側を非肌側ということがある。また、パンツ型吸収性物品(おむつ1)又はその構成部材の「肌対向面」とは、相対的に着用者の肌に近い面を意味する。パンツ型吸収性物品(おむつ1)又はその構成部材の「非肌対向面」とは、相対的に着用者の肌から遠い面を意味する。
また、本明細書において、各部位の寸法及び面積等の数値は、説明のない限り、各部の弾性部材を伸長させない自然状態において測定したものとする。 <First embodiment>
[Overall configuration of underpants-type disposable diaper]
1 and 2 show an underpants-typedisposable diaper 1 as an underpants-type absorbent article according to a first embodiment of the present invention. The pants-type disposable diaper 1 is hereinafter referred to as the diaper 1 .
As shown in FIG. 1, thediaper 1 has a waist opening 1W and a pair of leg openings 1L, and is worn around the wearer's waist and crotch when worn. The waist opening 1W has a waist opening end Wa. The diaper 1 has a longitudinal direction X and a transverse direction Y. As shown in FIG. The longitudinal direction X extends from the abdomen of the wearer through the crotch to the dorsal side. The lateral direction Y is orthogonal to the longitudinal direction X and corresponds to the lateral direction of the wearer. Further, as shown in FIG. 2 and the like, a direction perpendicular to the longitudinal direction X and the lateral direction Y of the diaper 1 is defined as a thickness direction Z. As shown in FIG.
In this specification, the "waist side" means the side in the longitudinal direction X near the waist opening end Wa of the waist opening 1W, and the "leg side" means the side in the longitudinal direction X from the waist opening end Wa. It means the far away side.
In this specification, the term “lateral direction Y inner side” means the side in the lateral direction Y that approaches the vertical center line CL that bisects the pants-type absorbent article (diaper 1) in the lateral direction Y. "Direction Y outside" means the side away from the longitudinal center line CL.
In this specification, regarding the thickness direction Z, the side close to the wearer's skin when wearing the pants-type absorbent article (diaper 1) is sometimes called the skin side, and the side close to the clothes is sometimes called the non-skin side. Further, the "skin-facing surface" of the pants-type absorbent article (diaper 1) or its constituent members means the surface relatively close to the wearer's skin. The "non-skin facing surface" of the pants-type absorbent article (diaper 1) or its constituent members means the surface relatively far from the wearer's skin.
Further, in this specification, numerical values such as dimensions and areas of each portion are measured in a natural state in which the elastic member of each portion is not stretched unless otherwise specified.
[パンツ型使い捨ておむつの全体構成]
図1及び図2には、本発明の第1実施形態に係るパンツ型吸収性物品として、パンツ型使い捨ておむつ1が示されている。パンツ型使い捨ておむつ1は、以下、おむつ1と称する。
図1に示すように、おむつ1は、ウエスト開口部1W及び一対のレッグ開口部1Lを備え、着用時に、着用者の胴回り及び股間部に着用される。ウエスト開口部1Wは、ウエスト開口端Waを有する。おむつ1は、縦方向X、横方向Yを有する。縦方向Xは、着用者の腹側から股間部を通って背側に延びる。横方向Yは、縦方向Xに直交し、着用者の左右方向に対応する。さらに、図2等に示すように、おむつ1の縦方向X及び横方向Yに直交する方向を、厚み方向Zとする。
本明細書において、「ウエスト側」とは、縦方向Xにおいて、ウエスト開口部1Wのウエスト開口端Waに近づく側を意味し、「レッグ側」とは、縦方向Xにおいて、ウエスト開口端Waから遠ざかる側を意味する。
本明細書において、「横方向Y内側」とは、横方向Yにおいて、パンツ型吸収性物品(おむつ1)を横方向Yに2等分する縦中心線CLに近づく側を意味し、「横方向Y外側」とは、縦中心線CLから遠ざかる側を意味する。
本明細書では、厚み方向Zに関しては、パンツ型吸収性物品(おむつ1)の着用時において着用者の肌に近い側を肌側、着衣に近い側を非肌側ということがある。また、パンツ型吸収性物品(おむつ1)又はその構成部材の「肌対向面」とは、相対的に着用者の肌に近い面を意味する。パンツ型吸収性物品(おむつ1)又はその構成部材の「非肌対向面」とは、相対的に着用者の肌から遠い面を意味する。
また、本明細書において、各部位の寸法及び面積等の数値は、説明のない限り、各部の弾性部材を伸長させない自然状態において測定したものとする。 <First embodiment>
[Overall configuration of underpants-type disposable diaper]
1 and 2 show an underpants-type
As shown in FIG. 1, the
In this specification, the "waist side" means the side in the longitudinal direction X near the waist opening end Wa of the waist opening 1W, and the "leg side" means the side in the longitudinal direction X from the waist opening end Wa. It means the far away side.
In this specification, the term “lateral direction Y inner side” means the side in the lateral direction Y that approaches the vertical center line CL that bisects the pants-type absorbent article (diaper 1) in the lateral direction Y. "Direction Y outside" means the side away from the longitudinal center line CL.
In this specification, regarding the thickness direction Z, the side close to the wearer's skin when wearing the pants-type absorbent article (diaper 1) is sometimes called the skin side, and the side close to the clothes is sometimes called the non-skin side. Further, the "skin-facing surface" of the pants-type absorbent article (diaper 1) or its constituent members means the surface relatively close to the wearer's skin. The "non-skin facing surface" of the pants-type absorbent article (diaper 1) or its constituent members means the surface relatively far from the wearer's skin.
Further, in this specification, numerical values such as dimensions and areas of each portion are measured in a natural state in which the elastic member of each portion is not stretched unless otherwise specified.
着用者がおむつ1を着用する際には、まず、一対のレッグ開口部1Lに脚を通し、おむつ1を胴体側に引き上げ、おむつ1を着用者の胴回り及び股間部に配置する。本明細書において、この一連の動作を、「着用動作」と称する。着用動作は、おむつ1の着用者自身ではなく、介助者によって行われることもある。
また、本明細書において、着用者の通常想定される着用位置におむつ1が配置された状態を、「着用時」と称する。 When the wearer puts on thediaper 1, the wearer first puts the legs through the pair of leg openings 1L, pulls up the diaper 1 toward the body, and places the diaper 1 around the wearer's waist and crotch. In this specification, this series of actions is referred to as a "wearing action". The action of putting on the diaper 1 may be performed not by the wearer of the diaper 1 but by a caregiver.
In addition, in this specification, the state in which thediaper 1 is arranged at the wearing position that is normally assumed to be worn by the wearer is referred to as "when worn".
また、本明細書において、着用者の通常想定される着用位置におむつ1が配置された状態を、「着用時」と称する。 When the wearer puts on the
In addition, in this specification, the state in which the
図1及び図2に示すように、おむつ1は、吸収性本体4と、吸収性本体4の非肌対向面側に配置された外装体5と、を備える。
なお、図2は、おむつ1を展開し、各部の弾性部材を伸張させて、弾性部材の影響を一切排除した状態の設計寸法となるように平面状に広げた形態を示す。この態様をおむつ1の「展開伸長形態」とも称する。おむつ1を展開するとは、後述するサイド接合部8の腹側領域5a及び背側領域5bを分離することを意味する。 As shown in FIGS. 1 and 2, thediaper 1 includes an absorbent main body 4 and an exterior body 5 arranged on the non-skin facing side of the absorbent main body 4 .
In addition, FIG. 2 shows a form in which thediaper 1 is unfolded, the elastic members of each part are stretched, and the diaper 1 is flattened so as to achieve the design dimensions in which the influence of the elastic members is completely eliminated. This mode is also referred to as the “deployed and stretched mode” of the diaper 1 . Unfolding the diaper 1 means separating the ventral region 5a and the dorsal region 5b of the side joints 8, which will be described later.
なお、図2は、おむつ1を展開し、各部の弾性部材を伸張させて、弾性部材の影響を一切排除した状態の設計寸法となるように平面状に広げた形態を示す。この態様をおむつ1の「展開伸長形態」とも称する。おむつ1を展開するとは、後述するサイド接合部8の腹側領域5a及び背側領域5bを分離することを意味する。 As shown in FIGS. 1 and 2, the
In addition, FIG. 2 shows a form in which the
吸収性本体4は、外装体5の肌対向面側に固定されている。吸収性本体4は、吸収体40を少なくとも有し、さらに、表面シート2、裏面シート(図示せず)等を有していてもよい。例えば、吸収性本体4は、裏面シート、吸収体40及び表面シート2が厚み方向Zに積層された構成を有する。吸収体40は、液保持性の吸収性コアを含み、さらに、当該吸収性コアを被覆するコアラップシートを含んでいてもよい。
吸収性本体4に含まれる各構成(裏面シート、吸収体40、表面シート2等)に用いられる材料としては、当該技術分野において用いられるものを特に制限なく用いることができる。 The absorbentmain body 4 is fixed to the skin-facing surface side of the exterior body 5 . The absorbent main body 4 has at least an absorbent body 40, and may further have a topsheet 2, a backsheet (not shown), and the like. For example, the absorbent main body 4 has a configuration in which a back sheet, an absorbent body 40 and a top sheet 2 are laminated in the thickness direction Z. As shown in FIG. The absorbent body 40 includes a liquid-retaining absorbent core, and may further include a core wrap sheet covering the absorbent core.
Materials used in the respective components (backsheet,absorbent body 40, topsheet 2, etc.) included in the absorbent main body 4 may be those used in the relevant technical field without particular limitations.
吸収性本体4に含まれる各構成(裏面シート、吸収体40、表面シート2等)に用いられる材料としては、当該技術分野において用いられるものを特に制限なく用いることができる。 The absorbent
Materials used in the respective components (backsheet,
外装体5は、複数の熱可塑性シート50を含む。外装体5は、例えば、複数の熱可塑性シート50の積層体として構成される。
熱可塑性シート50は、熱可塑性樹脂を主体とするシート材である。熱可塑性シート50は、好ましくは90質量%以上の熱可塑性樹脂を含み、より好ましくは100質量%の熱可塑性樹脂で構成される。
熱可塑性樹脂としては、ポリエチレン、ポリプロピレン等のポリオレフィン;ポリエチレンテレフタレート等のポリエステル;ナイロン6、ナイロン66等のポリアミド;ポリアクリル酸、ポリメタクリル酸アルキルエステル、ポリ塩化ビニル、ポリ塩化ビニリデン等が挙げられ、これらの1種を単独で又は2種以上を組み合わせて用いることができる。熱可塑性繊維は、短繊維でも長繊維でも良い。熱可塑性繊維としては、芯鞘型又はサイド・バイ・サイド型等の複合繊維、分割繊維、異形断面繊維、熱収縮繊維等を用いることもできる。 Theouter body 5 includes multiple thermoplastic sheets 50 . The exterior body 5 is configured as a laminate of a plurality of thermoplastic sheets 50, for example.
Thethermoplastic sheet 50 is a sheet material mainly made of thermoplastic resin. The thermoplastic sheet 50 preferably contains 90% by mass or more of thermoplastic resin, more preferably 100% by mass of thermoplastic resin.
Examples of thermoplastic resins include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate; polyamides such as nylon 6 and nylon 66; These 1 types can be used individually or in combination of 2 or more types. The thermoplastic fibers may be short fibers or long fibers. As thermoplastic fibers, core-sheath type or side-by-side type composite fibers, split fibers, modified cross-section fibers, heat-shrinkable fibers, and the like can also be used.
熱可塑性シート50は、熱可塑性樹脂を主体とするシート材である。熱可塑性シート50は、好ましくは90質量%以上の熱可塑性樹脂を含み、より好ましくは100質量%の熱可塑性樹脂で構成される。
熱可塑性樹脂としては、ポリエチレン、ポリプロピレン等のポリオレフィン;ポリエチレンテレフタレート等のポリエステル;ナイロン6、ナイロン66等のポリアミド;ポリアクリル酸、ポリメタクリル酸アルキルエステル、ポリ塩化ビニル、ポリ塩化ビニリデン等が挙げられ、これらの1種を単独で又は2種以上を組み合わせて用いることができる。熱可塑性繊維は、短繊維でも長繊維でも良い。熱可塑性繊維としては、芯鞘型又はサイド・バイ・サイド型等の複合繊維、分割繊維、異形断面繊維、熱収縮繊維等を用いることもできる。 The
The
Examples of thermoplastic resins include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate; polyamides such as nylon 6 and nylon 66; These 1 types can be used individually or in combination of 2 or more types. The thermoplastic fibers may be short fibers or long fibers. As thermoplastic fibers, core-sheath type or side-by-side type composite fibers, split fibers, modified cross-section fibers, heat-shrinkable fibers, and the like can also be used.
外装体5は、着用者の腹側に配置される腹側領域5aと、着用者の背側に配置される背側領域5bと、を少なくとも有する。本実施形態の外装体5は、さらに、腹側領域5a及び背側領域5bの間に位置し着用者の股間部に配置される股下領域5cを含む。この例において、腹側領域5a、股下領域5c、及び背側領域5b、は、縦方向Xに沿って配置されている。また、外装体5は、股下領域5cにおいて横方向Y内側に括れた形状を有する。これにより、着用者の脚繰りに沿ったレッグ開口部1L(図1参照)が形成される。
外装体5の外縁は、縦中心線CLに関して線対称(左右対称)に構成されることが好ましい。 Theouter body 5 has at least a ventral region 5a arranged on the ventral side of the wearer and a dorsal region 5b arranged on the dorsal side of the wearer. The outer body 5 of this embodiment further includes a crotch region 5c located between the abdominal region 5a and the dorsal region 5b and arranged in the wearer's crotch region. In this example, the ventral region 5a, the crotch region 5c, and the dorsal region 5b are arranged along the longitudinal direction X. As shown in FIG. Further, the outer body 5 has a shape constricted inward in the lateral direction Y in the crotch region 5c. Thereby, a leg opening 1L (see FIG. 1) is formed along the wearer's leg loop.
It is preferable that the outer edge of theexterior body 5 is configured line-symmetrically (left-right symmetrically) with respect to the longitudinal center line CL.
外装体5の外縁は、縦中心線CLに関して線対称(左右対称)に構成されることが好ましい。 The
It is preferable that the outer edge of the
さらに、外装体5は、腹側領域5aの横方向Yにおける側縁部5dと、背側領域5bの横方向Yにおける側縁部5eとがそれぞれ接合された、一対のサイド接合部8を有する。右側のサイド接合部8は、腹側領域5aの右側の側縁部5dと、背側領域5bの右側の側縁部5eとが、厚み方向Zに重ねられて接合された構成を有する。左側のサイド接合部8は、腹側領域5aの左側の側縁部5dと、背側領域5bの左側の側縁部5eとが、厚み方向Zに重ねられて接合された構成を有する。
一対のサイド接合部8によって、腹側領域5aと背側領域5bとが着用者の胴周りに沿った筒状となり、おむつ1のウエスト開口部1W及びレッグ開口部1Lが形成される。
サイド接合部8は、詳細を後述するように、ヒートシールや超音波シールなどによって接合されることが好ましい。 Furthermore, theexterior body 5 has a pair of side joints 8 where a side edge 5d in the lateral direction Y of the ventral region 5a and a side edge 5e in the lateral direction Y of the dorsal region 5b are respectively joined. . The right side joint portion 8 has a structure in which a right side edge portion 5d of the ventral region 5a and a right side edge portion 5e of the dorsal region 5b are overlapped in the thickness direction Z and joined. The left side joint portion 8 has a structure in which a left side edge portion 5d of the ventral region 5a and a left side edge portion 5e of the dorsal region 5b are overlapped in the thickness direction Z and joined.
By the pair ofside joints 8, the abdominal area 5a and the dorsal area 5b form a tubular shape along the waist of the wearer, forming a waist opening 1W and leg openings 1L of the diaper 1. As shown in FIG.
The side joints 8 are preferably joined by heat sealing, ultrasonic sealing, or the like, as will be described later in detail.
一対のサイド接合部8によって、腹側領域5aと背側領域5bとが着用者の胴周りに沿った筒状となり、おむつ1のウエスト開口部1W及びレッグ開口部1Lが形成される。
サイド接合部8は、詳細を後述するように、ヒートシールや超音波シールなどによって接合されることが好ましい。 Furthermore, the
By the pair of
The side joints 8 are preferably joined by heat sealing, ultrasonic sealing, or the like, as will be described later in detail.
[サイド接合部の構成]
サイド接合部8は、着用動作時及び着用時には、腹側領域5aと背側領域5bとが剥がれることなく、接合された状態を維持することが好ましい。
一方で、着用後におむつ1を交換する際には、おむつ1に付着した排泄物を衛生的に処理する観点から、介助者等が、サイド接合部8の腹側領域5aと背側領域5bとを分離して、おむつ1を展開してから廃棄することがある。
このように、サイド接合部8は、着用動作時及び着用時においては剥がれを防止でき、かつ、廃棄時においては容易に引き裂ける構成を有することが好ましい。
なお、本明細書において、おむつ1の着用動作時及び着用時に、サイド接合部8の腹側領域5aと背側領域5bとが意図せずに分離することを「剥がれる」と表現する。これに対して、おむつ1の廃棄時に、サイド接合部8及び/又はその周囲に外力を加えて、意図的にサイド接合部8の腹側領域5aと背側領域5bを分離する動作を、「引き裂く」と表現する。
また、おむつ1の廃棄時にサイド接合部8を引き裂く主体を「廃棄者」と表現する。 [Structure of side joint]
It is preferable that theside joints 8 maintain the jointed state without peeling off the ventral region 5a and the dorsal region 5b during the wearing operation and wearing.
On the other hand, when changing thediaper 1 after wearing it, from the viewpoint of hygienically disposing of the excrement adhering to the diaper 1, a caregiver or the like should separate the ventral region 5a and the dorsal region 5b of the side joints 8 from each other. are separated and the diaper 1 is unfolded and then discarded.
In this way, it is preferable that theside joints 8 have such a structure that they can be prevented from being peeled off during the wearing operation and wearing, and can be easily torn at the time of disposal.
In this specification, unintentional separation of theventral region 5a and the dorsal region 5b of the side joints 8 when the diaper 1 is put on and worn is expressed as "peeled off". On the other hand, when discarding the diaper 1, the operation of intentionally separating the ventral region 5a and the dorsal region 5b of the side joints 8 by applying an external force to the side joints 8 and/or their surroundings is referred to as " Tear apart.”
Also, the subject who tears theside joints 8 when discarding the diaper 1 is expressed as a "disposer".
サイド接合部8は、着用動作時及び着用時には、腹側領域5aと背側領域5bとが剥がれることなく、接合された状態を維持することが好ましい。
一方で、着用後におむつ1を交換する際には、おむつ1に付着した排泄物を衛生的に処理する観点から、介助者等が、サイド接合部8の腹側領域5aと背側領域5bとを分離して、おむつ1を展開してから廃棄することがある。
このように、サイド接合部8は、着用動作時及び着用時においては剥がれを防止でき、かつ、廃棄時においては容易に引き裂ける構成を有することが好ましい。
なお、本明細書において、おむつ1の着用動作時及び着用時に、サイド接合部8の腹側領域5aと背側領域5bとが意図せずに分離することを「剥がれる」と表現する。これに対して、おむつ1の廃棄時に、サイド接合部8及び/又はその周囲に外力を加えて、意図的にサイド接合部8の腹側領域5aと背側領域5bを分離する動作を、「引き裂く」と表現する。
また、おむつ1の廃棄時にサイド接合部8を引き裂く主体を「廃棄者」と表現する。 [Structure of side joint]
It is preferable that the
On the other hand, when changing the
In this way, it is preferable that the
In this specification, unintentional separation of the
Also, the subject who tears the
本実施形態においては、一対のサイド接合部8が、例えば縦中心線CLに関して実質的に線対称に構成され、それぞれ同様の構成を有することが好ましい。以下では、一方のサイド接合部8の構成について詳細に説明する。
In the present embodiment, it is preferable that the pair of side joints 8 are configured substantially line-symmetrically with respect to the longitudinal center line CL, for example, and have the same configuration. The configuration of one side joint portion 8 will be described in detail below.
図2に示すように、サイド接合部8は、ウエスト側の端部であるウエスト端部8aから縦方向Xに25mm以内のウエスト端部領域8cと、縦方向Xのレッグ側の端部であるレッグ端部8bから縦方向Xに25mm以内のレッグ端部領域8dと、を有する。
ウエスト端部8a及びレッグ端部8bは、サイド接合部8の縦方向Xにおける両端部を構成する。
サイド接合部8は、全体として、ウエスト端部8aからレッグ端部8bまで、縦方向Xに延びる構成を有する。
なお、サイド接合部8において、縦方向X端部側とは、ウエスト端部8a又はレッグ端部8bに近づく側を意味し、縦方向X中央側とは、ウエスト端部8a又はレッグ端部8bから遠ざかる側を意味する。 As shown in FIG. 2, theside joints 8 are a waist end region 8c within 25 mm in the longitudinal direction X from a waist end 8a, which is the end on the waist side, and an end on the leg side in the longitudinal direction X. and a leg end region 8d within 25 mm in the longitudinal direction X from the leg end 8b.
Thewaist end portion 8a and the leg end portion 8b constitute both end portions of the side joint portion 8 in the longitudinal direction X. As shown in FIG.
The sidejoint portion 8 has a configuration extending in the longitudinal direction X from the waist end portion 8a to the leg end portion 8b as a whole.
In addition, in the sidejoint portion 8, the longitudinal direction X end side means the side approaching the waist end portion 8a or the leg end portion 8b, and the longitudinal direction X central side means the waist end portion 8a or the leg end portion 8b. means the side away from
ウエスト端部8a及びレッグ端部8bは、サイド接合部8の縦方向Xにおける両端部を構成する。
サイド接合部8は、全体として、ウエスト端部8aからレッグ端部8bまで、縦方向Xに延びる構成を有する。
なお、サイド接合部8において、縦方向X端部側とは、ウエスト端部8a又はレッグ端部8bに近づく側を意味し、縦方向X中央側とは、ウエスト端部8a又はレッグ端部8bから遠ざかる側を意味する。 As shown in FIG. 2, the
The
The side
In addition, in the side
サイド接合部8は、複数のシール部Sをさらに有する。シール部Sは、腹側領域5a及び背側領域5bの双方の熱可塑性シート50が融着して接合された部分である。シール部Sは、例えば、加圧手段及び/又は加熱手段によって接合され、具体的には、ヒートシールや超音波シールなどによって接合される。
図4に示すように、サイド接合部8のX-Z断面(縦方向Xの切断面)を拡大すると、シール部Sは、熱可塑性シート50の繊維55が融着して、周囲よりも厚みが薄くなった部分として観察される。 The sidejoint portion 8 further has a plurality of seal portions S. The seal portion S is a portion where the thermoplastic sheets 50 of both the ventral region 5a and the dorsal region 5b are fused and joined. The sealed portion S is bonded by, for example, pressurizing means and/or heating means, and specifically by heat sealing, ultrasonic sealing, or the like.
As shown in FIG. 4, when the XZ cross section (the cut surface in the longitudinal direction X) of the sidejoint portion 8 is enlarged, the sealing portion S is thicker than the surroundings due to the fusion of the fibers 55 of the thermoplastic sheet 50. is observed as a thinned portion.
図4に示すように、サイド接合部8のX-Z断面(縦方向Xの切断面)を拡大すると、シール部Sは、熱可塑性シート50の繊維55が融着して、周囲よりも厚みが薄くなった部分として観察される。 The side
As shown in FIG. 4, when the XZ cross section (the cut surface in the longitudinal direction X) of the side
図3に示すように、複数のシール部Sは、縦方向Xに離間して配置される。これにより、一つのシール部Sが剥がれた場合に、縦方向Xに沿ってサイド接合部8全体が剥がれることを防止できる。
シール部Sの平面形状は、特に限定されず、矩形状、その他の多角形状、円形状、楕円形状、これらに類似する形状、その他の形状から選ばれた形状であり得る。
図3に示すように、間隔をあけつつ各シール部Sの面積を十分に確保する等の観点から、シール部Sの平面形状は、矩形状が好ましい。 As shown in FIG. 3, the plurality of seal portions S are spaced apart in the vertical direction X. As shown in FIG. This can prevent the entire sidejoint portion 8 from peeling off along the vertical direction X when one seal portion S is peeled off.
The planar shape of the seal portion S is not particularly limited, and may be a shape selected from a rectangular shape, other polygonal shapes, a circular shape, an elliptical shape, shapes similar thereto, and other shapes.
As shown in FIG. 3, the planar shape of the seal portions S is preferably a rectangular shape from the viewpoint of securing a sufficient area for each seal portion S while leaving a space therebetween.
シール部Sの平面形状は、特に限定されず、矩形状、その他の多角形状、円形状、楕円形状、これらに類似する形状、その他の形状から選ばれた形状であり得る。
図3に示すように、間隔をあけつつ各シール部Sの面積を十分に確保する等の観点から、シール部Sの平面形状は、矩形状が好ましい。 As shown in FIG. 3, the plurality of seal portions S are spaced apart in the vertical direction X. As shown in FIG. This can prevent the entire side
The planar shape of the seal portion S is not particularly limited, and may be a shape selected from a rectangular shape, other polygonal shapes, a circular shape, an elliptical shape, shapes similar thereto, and other shapes.
As shown in FIG. 3, the planar shape of the seal portions S is preferably a rectangular shape from the viewpoint of securing a sufficient area for each seal portion S while leaving a space therebetween.
ここで、本発明者らの知見では、サイド接合部8の引き裂き動作の開始時において、廃棄者の指は、ウエスト端部8a又はレッグ端部8bから縦方向Xに25mm~30mm程度離れた、サイド接合部8の左右両側(腹側及び背側)に配置されやすい。例えば、着用者が立位の場合には、廃棄者の指はウエスト側に配置され、着用者が臥位の場合には、廃棄者の指はレッグ側に配置されやすい。
そこで、サイド接合部8において、引き裂きのための外力(「引き裂き力」とも称する)が特に付加されやすい領域を、ウエスト端部8a及びレッグ端部8bからそれぞれ縦方向Xに25mm以内のウエスト端部領域8c及びレッグ端部領域8dと定める。そして、着用時及び着用動作時の破れを防止しつつ、廃棄時の引き裂きを容易にする観点から、このウエスト端部領域8c及び/又はレッグ端部領域8dにおけるシール部Sの配置及びシール強度を以下のように構成する。
なお、図3では、シール部Sが特徴的な配置及びシール強度を有する領域が、ウエスト端部領域8cである例について示している。 Here, according to the findings of the present inventors, at the start of the tearing operation of the side joints 8, the fingers of the disposal person are separated from thewaist end 8a or the leg end 8b by about 25 mm to 30 mm in the longitudinal direction X. It is likely to be arranged on both the left and right sides (abdominal side and dorsal side) of the side joint portion 8 . For example, when the wearer is standing, the disposer's fingers are likely to be placed on the waist side, and when the wearer is lying down, the disposer's fingers are likely to be placed on the leg side.
Therefore, in the side joints 8, the region to which the external force for tearing (also referred to as "tearing force") is particularly likely to be applied is the waist end within 25 mm in the longitudinal direction X from thewaist end 8a and the leg end 8b. Region 8c and leg end region 8d are defined. From the viewpoint of facilitating tearing during disposal while preventing tearing during wearing and wearing, the arrangement and sealing strength of the seal portion S in the waist end region 8c and/or the leg end region 8d are adjusted. Configure as follows.
Note that FIG. 3 shows an example in which the region where the seal portion S has a characteristic arrangement and seal strength is thewaist end region 8c.
そこで、サイド接合部8において、引き裂きのための外力(「引き裂き力」とも称する)が特に付加されやすい領域を、ウエスト端部8a及びレッグ端部8bからそれぞれ縦方向Xに25mm以内のウエスト端部領域8c及びレッグ端部領域8dと定める。そして、着用時及び着用動作時の破れを防止しつつ、廃棄時の引き裂きを容易にする観点から、このウエスト端部領域8c及び/又はレッグ端部領域8dにおけるシール部Sの配置及びシール強度を以下のように構成する。
なお、図3では、シール部Sが特徴的な配置及びシール強度を有する領域が、ウエスト端部領域8cである例について示している。 Here, according to the findings of the present inventors, at the start of the tearing operation of the side joints 8, the fingers of the disposal person are separated from the
Therefore, in the side joints 8, the region to which the external force for tearing (also referred to as "tearing force") is particularly likely to be applied is the waist end within 25 mm in the longitudinal direction X from the
Note that FIG. 3 shows an example in which the region where the seal portion S has a characteristic arrangement and seal strength is the
図3に示すように、サイド接合部8の少なくとも一方は、縦方向Xに沿って離間して整列した複数のシール部Sでそれぞれ構成され、横方向Yに沿ってウエスト端部領域8cに配列された複数のシール列SLを有する。
「複数のシール部Sが縦方向Xに沿って離間して整列する」とは、縦方向Xに離間した複数のシール部Sが、縦方向Xに延びる一本の直線上に並んで配置されることを意味する。具体的に、一つのシール列SL内では、各シール部Sを横方向Yに2等分する直線のずれが、シール部Sの横方向Yにおける最大寸法の50%以内に収まることが好ましい。 As shown in FIG. 3, at least one of the side joints 8 is each composed of a plurality of seals S spaced apart in the longitudinal direction X and aligned in the transverse direction Y in thewaist end region 8c. has a plurality of seal rows SL.
"A plurality of seal portions S are aligned along the longitudinal direction X with a space therebetween" means that a plurality of seal portions S spaced apart in the longitudinal direction X are arranged side by side on a straight line extending in the longitudinal direction X. means Specifically, in one seal row SL, it is preferable that the deviation of the straight line that bisects each seal portion S in the lateral direction Y is within 50% of the maximum dimension of the seal portion S in the lateral direction Y.
「複数のシール部Sが縦方向Xに沿って離間して整列する」とは、縦方向Xに離間した複数のシール部Sが、縦方向Xに延びる一本の直線上に並んで配置されることを意味する。具体的に、一つのシール列SL内では、各シール部Sを横方向Yに2等分する直線のずれが、シール部Sの横方向Yにおける最大寸法の50%以内に収まることが好ましい。 As shown in FIG. 3, at least one of the side joints 8 is each composed of a plurality of seals S spaced apart in the longitudinal direction X and aligned in the transverse direction Y in the
"A plurality of seal portions S are aligned along the longitudinal direction X with a space therebetween" means that a plurality of seal portions S spaced apart in the longitudinal direction X are arranged side by side on a straight line extending in the longitudinal direction X. means Specifically, in one seal row SL, it is preferable that the deviation of the straight line that bisects each seal portion S in the lateral direction Y is within 50% of the maximum dimension of the seal portion S in the lateral direction Y.
「シール列SLが横方向Yに沿って配列される」とは、複数のシール列が横方向Yに並んでおり、横方向Yに隣り合うシール列SLに属するシール部Sが離間して配置されることを意味する。
本実施形態において、複数のシール列SLは、少なくとも一部がウエスト端部領域8cに配置されていればよく、ウエスト端部領域8cから縦方向Xに延出していてもよい。図3に示す例では、複数のシール列SLが、サイド接合部8の縦方向X全体に配置されている。 “The seal rows SL are arranged along the lateral direction Y” means that a plurality of seal rows are aligned in the lateral direction Y, and the seal portions S belonging to the seal rows SL adjacent to each other in the lateral direction Y are arranged apart from each other. means to be
In the present embodiment, at least a portion of the plurality of seal rows SL may be arranged in thewaist end region 8c, and may extend in the longitudinal direction X from the waist end region 8c. In the example shown in FIG. 3 , a plurality of seal rows SL are arranged over the longitudinal direction X of the side joint portion 8 .
本実施形態において、複数のシール列SLは、少なくとも一部がウエスト端部領域8cに配置されていればよく、ウエスト端部領域8cから縦方向Xに延出していてもよい。図3に示す例では、複数のシール列SLが、サイド接合部8の縦方向X全体に配置されている。 “The seal rows SL are arranged along the lateral direction Y” means that a plurality of seal rows are aligned in the lateral direction Y, and the seal portions S belonging to the seal rows SL adjacent to each other in the lateral direction Y are arranged apart from each other. means to be
In the present embodiment, at least a portion of the plurality of seal rows SL may be arranged in the
図3に示す例では、ウエスト端部領域8cに3つのシール列SLが並んでいる。これらのシール列SLを、横方向Y内側から外側に向かって、第1シール列SL1、第2シール列SL2、及び第3シール列SL3とも称する。以下の説明において、これらのシール列SLを区別する必要がないときは、単にシール列SLと称する。
なお、ウエスト端部領域8cにおけるシール列SLの数は3列に限定されない。例えば、ウエスト端部領域8cにおけるシール列SLの数は、2列以上、好ましくは3列以上7列以下である。 In the example shown in FIG. 3, three seal rows SL are arranged in thewaist end region 8c. These seal rows SL are also referred to as a first seal row SL1, a second seal row SL2, and a third seal row SL3 from the inner side to the outer side in the lateral direction Y. In the following description, when there is no need to distinguish these seal rows SL, they are simply referred to as seal rows SL.
Note that the number of seal rows SL in thewaist end region 8c is not limited to three. For example, the number of seal rows SL in the waist end region 8c is two or more, preferably three or more and seven or less.
なお、ウエスト端部領域8cにおけるシール列SLの数は3列に限定されない。例えば、ウエスト端部領域8cにおけるシール列SLの数は、2列以上、好ましくは3列以上7列以下である。 In the example shown in FIG. 3, three seal rows SL are arranged in the
Note that the number of seal rows SL in the
上記構成では、各シール列SLに属するシール部Sが、縦方向X及び横方向Yに離間して配置される。これにより、着用時及び着用動作時に1つのシール部Sが剥がれた際に、その影響が他のシール部Sに伝搬しにくくなる。したがって、着用動作時及び着用時のサイド接合部8の剥がれを効果的に防止することができる。
In the above configuration, the seal portions S belonging to each seal line SL are spaced apart in the vertical direction X and the horizontal direction Y. As a result, when one seal portion S is peeled off during wearing and wearing operation, the influence thereof is less likely to propagate to the other seal portions S. Therefore, it is possible to effectively prevent the peeling of the side joints 8 during the wearing operation and wearing.
一方、引き裂き動作の開始時には、ウエスト端部領域8c及び/又はレッグ端部領域8dの内側から、縦方向X中央側及び横方向Y外側の成分を併せ持つ引き裂き力Fが加えられる。図3に示すように、この引き裂き力Fは、縦方向X及び横方向Yに対しておよそ45°傾いた斜め外方の力となる。したがって、サイド接合部8では、第1シール列SL1の縦方向X端部側のシール部Sから、縦方向X中央側に向かって、かつ横方向Y内側から外側に向かって、シール部Sが順に引き裂かれる。
複数のシール部Sが縦方向X及び横方向Yに並ぶウエスト端部領域8c及び/又はレッグ端部領域8dでは、横方向Y内側のシール列SLのシール部Sの引き裂きが完了する前に、斜めに隣接する、その外側のシール列SLのシール部Sの引き裂きが開始することが多い。サイド接合部8では、2つの斜めに隣接するシール部Sが近い位置においてほぼ同時に引き裂かれることで、外装体5に対して局所的に過大な負荷が加わることがある。これにより、サイド接合部8では、外装体5がシール部Sに隣接する部分で破断し、さらに外装体5の破断がシール部Sの長手方向に沿って横方向Y外向きに進行するいわゆる横裂けが発生することがある。外装体5の横裂けが発生すると、その度に引き裂き動作が中断するため、廃棄者や着用者にとって大きいストレスとなる。 On the other hand, at the start of the tearing action, a tearing force F having both longitudinal direction X central side and lateral direction Y outer components is applied from the inside of thewaist end region 8c and/or the leg end region 8d. As shown in FIG. 3, this tearing force F is an oblique outward force that is inclined by about 45° with respect to the longitudinal direction X and the lateral direction Y. As shown in FIG. Therefore, in the side joint portion 8, the seal portion S extends from the seal portion S on the end side in the longitudinal direction X of the first seal row SL1 toward the center in the longitudinal direction X and from the inner side to the outer side in the lateral direction Y. torn apart in order.
In thewaist end region 8c and/or the leg end region 8d in which a plurality of seals S are arranged in the longitudinal direction X and the lateral direction Y, before tearing of the seals S in the inner seal row SL in the lateral direction Y is completed, The tearing of the seal portion S of the diagonally adjacent outer seal row SL often begins. At the side joint portion 8 , the two diagonally adjacent seal portions S are torn almost simultaneously at close positions, which may locally apply an excessive load to the exterior body 5 . As a result, at the side joint portion 8, the exterior body 5 is broken at a portion adjacent to the seal portion S, and the breakage of the exterior body 5 progresses in the lateral direction Y outward along the longitudinal direction of the seal portion S, a so-called lateral joint. Cracking may occur. If the exterior body 5 is torn laterally, the tearing action is interrupted each time, which causes great stress to the disposal person and the wearer.
複数のシール部Sが縦方向X及び横方向Yに並ぶウエスト端部領域8c及び/又はレッグ端部領域8dでは、横方向Y内側のシール列SLのシール部Sの引き裂きが完了する前に、斜めに隣接する、その外側のシール列SLのシール部Sの引き裂きが開始することが多い。サイド接合部8では、2つの斜めに隣接するシール部Sが近い位置においてほぼ同時に引き裂かれることで、外装体5に対して局所的に過大な負荷が加わることがある。これにより、サイド接合部8では、外装体5がシール部Sに隣接する部分で破断し、さらに外装体5の破断がシール部Sの長手方向に沿って横方向Y外向きに進行するいわゆる横裂けが発生することがある。外装体5の横裂けが発生すると、その度に引き裂き動作が中断するため、廃棄者や着用者にとって大きいストレスとなる。 On the other hand, at the start of the tearing action, a tearing force F having both longitudinal direction X central side and lateral direction Y outer components is applied from the inside of the
In the
これに対し、本実施形態では、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有する。
「横方向Yに隣り合う2つのシール部S」とは、各シール部Sにおいて横方向Y及び縦方向Xに2等分する位置を「中心部」とした場合、1つのシール部Sと、そのシール部Sの中心部との距離が最も近い中心部を有する他のシール部Sと、の2つのシール部Sを意味する。
このように、本発明では、少なくとも、隣り合う2つのシール部Sにおけるシール強度の関係が上記関係を満たせばよい。 On the other hand, in the present embodiment, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S positioned on the inner side in the lateral direction Y is the seal portion S located on the outer side in the lateral direction Y. It has lower seal strength than S.
“Two seal portions S adjacent to each other in the horizontal direction Y” means one seal portion S when the position of each seal portion S that is divided into two equal parts in the horizontal direction Y and the vertical direction X is defined as the “central portion”, The other seal portion S having a center portion closest to the center portion of the seal portion S and two seal portions S are meant.
Thus, in the present invention, at least the relationship between the seal strengths of two adjacent seal portions S should satisfy the above relationship.
「横方向Yに隣り合う2つのシール部S」とは、各シール部Sにおいて横方向Y及び縦方向Xに2等分する位置を「中心部」とした場合、1つのシール部Sと、そのシール部Sの中心部との距離が最も近い中心部を有する他のシール部Sと、の2つのシール部Sを意味する。
このように、本発明では、少なくとも、隣り合う2つのシール部Sにおけるシール強度の関係が上記関係を満たせばよい。 On the other hand, in the present embodiment, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S positioned on the inner side in the lateral direction Y is the seal portion S located on the outer side in the lateral direction Y. It has lower seal strength than S.
“Two seal portions S adjacent to each other in the horizontal direction Y” means one seal portion S when the position of each seal portion S that is divided into two equal parts in the horizontal direction Y and the vertical direction X is defined as the “central portion”, The other seal portion S having a center portion closest to the center portion of the seal portion S and two seal portions S are meant.
Thus, in the present invention, at least the relationship between the seal strengths of two adjacent seal portions S should satisfy the above relationship.
本実施形態では、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sのシール強度が次第に増加することが好ましい。
図3に示す例では、第1シール列SL1の各シール部Sのシール強度は、第2シール列SL2の各シール部Sのシール強度よりも低くなる。同様に、第2シール列SL2の各シール部Sのシール強度は、第3シール列SL3の各シール部Sのシール強度よりも低くなる。つまり、シール部Sのシール強度は、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及びその外側の第3シール列SL3の順に高くなる。
本明細書において、シール強度とは、テンシロン等の測定装置によって計測される剥離強度をいう。また、剥離強度とは、テンシロン等の測定装置によって計測される局所的な剥離強度をいう。これに対して、接合強度とは、サイド接合部8の引き裂き時に廃棄者が感じる接合の強さをいう。
上記構成では、引き裂き力Fが最初の方に付加される横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sのシール強度が低い。これにより、廃棄者が、最初の方のシール部Sの引き裂きを楽に感じやすくなり、サイド接合部8に強い力を加えにくくなる。
さらに、斜めに隣り合う2つのシール部Sが同時に引き裂かれる際には、一方のシール部Sのシール強度が他方のシール部Sのシール強度よりも低くなる。これにより、全てのシール部Sが同一のシール強度を有する場合と比較して、2つのシール部Sの合計のシール強度を低く抑えることができる。したがって、引き裂きの途中においても、廃棄者による引き裂き力Fが高まりにくくなり、外装体5への負荷が軽減される。
これらにより、引き裂きが楽に感じられるとともに、外装体5の横裂けの発生を防止することができる。
また、横方向Y外側のシール列SL(例えば第3シール列SL3)のシール強度を高く設定することができるため、着用時及び着用動作時の剥がれを防止することができる。
したがって、本実施形態のサイド接合部8では、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。 In this embodiment, it is preferable that the seal strength of the seal portion S gradually increases from the inner seal row SL in the lateral direction Y toward the outer seal row SL.
In the example shown in FIG. 3, the seal strength of each seal portion S of the first seal row SL1 is lower than the seal strength of each seal portion S of the second seal row SL2. Similarly, the seal strength of each seal portion S of the second seal row SL2 is lower than the seal strength of each seal portion S of the third seal row SL3. That is, the seal strength of the seal portion S increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
As used herein, seal strength refers to peel strength measured by a measuring device such as Tensilon. Moreover, the peel strength refers to the local peel strength measured by a measuring device such as Tensilon. On the other hand, the joint strength refers to the strength of joint felt by the disposal person when the sidejoint portion 8 is torn.
In the above configuration, the seal strength of the seal portion S of the seal row SL (for example, the first seal row SL1) on the inner side in the lateral direction Y to which the tearing force F is applied first is low. This makes it easier for the person who disposes to easily tear the seal portion S at the beginning, and makes it difficult to apply a strong force to the sidejoint portion 8 .
Furthermore, when two diagonally adjacent seal portions S are torn at the same time, the seal strength of one seal portion S becomes lower than the seal strength of the other seal portion S. As a result, the total seal strength of the two seal portions S can be kept low compared to the case where all seal portions S have the same seal strength. Therefore, even in the middle of tearing, the tearing force F by the disposal person is less likely to increase, and the load on theexterior body 5 is reduced.
As a result, tearing can be easily felt, and lateral tearing of theexterior body 5 can be prevented.
In addition, since the seal strength of the seal line SL (for example, the third seal line SL3) on the outer side in the lateral direction Y can be set high, it is possible to prevent peeling during wearing and wearing operation.
Therefore, in the sidejoint portion 8 of the present embodiment, it is possible to achieve both the prevention of peeling during wearing and the wearing operation and the easiness of tearing during disposal.
図3に示す例では、第1シール列SL1の各シール部Sのシール強度は、第2シール列SL2の各シール部Sのシール強度よりも低くなる。同様に、第2シール列SL2の各シール部Sのシール強度は、第3シール列SL3の各シール部Sのシール強度よりも低くなる。つまり、シール部Sのシール強度は、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及びその外側の第3シール列SL3の順に高くなる。
本明細書において、シール強度とは、テンシロン等の測定装置によって計測される剥離強度をいう。また、剥離強度とは、テンシロン等の測定装置によって計測される局所的な剥離強度をいう。これに対して、接合強度とは、サイド接合部8の引き裂き時に廃棄者が感じる接合の強さをいう。
上記構成では、引き裂き力Fが最初の方に付加される横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sのシール強度が低い。これにより、廃棄者が、最初の方のシール部Sの引き裂きを楽に感じやすくなり、サイド接合部8に強い力を加えにくくなる。
さらに、斜めに隣り合う2つのシール部Sが同時に引き裂かれる際には、一方のシール部Sのシール強度が他方のシール部Sのシール強度よりも低くなる。これにより、全てのシール部Sが同一のシール強度を有する場合と比較して、2つのシール部Sの合計のシール強度を低く抑えることができる。したがって、引き裂きの途中においても、廃棄者による引き裂き力Fが高まりにくくなり、外装体5への負荷が軽減される。
これらにより、引き裂きが楽に感じられるとともに、外装体5の横裂けの発生を防止することができる。
また、横方向Y外側のシール列SL(例えば第3シール列SL3)のシール強度を高く設定することができるため、着用時及び着用動作時の剥がれを防止することができる。
したがって、本実施形態のサイド接合部8では、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。 In this embodiment, it is preferable that the seal strength of the seal portion S gradually increases from the inner seal row SL in the lateral direction Y toward the outer seal row SL.
In the example shown in FIG. 3, the seal strength of each seal portion S of the first seal row SL1 is lower than the seal strength of each seal portion S of the second seal row SL2. Similarly, the seal strength of each seal portion S of the second seal row SL2 is lower than the seal strength of each seal portion S of the third seal row SL3. That is, the seal strength of the seal portion S increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
As used herein, seal strength refers to peel strength measured by a measuring device such as Tensilon. Moreover, the peel strength refers to the local peel strength measured by a measuring device such as Tensilon. On the other hand, the joint strength refers to the strength of joint felt by the disposal person when the side
In the above configuration, the seal strength of the seal portion S of the seal row SL (for example, the first seal row SL1) on the inner side in the lateral direction Y to which the tearing force F is applied first is low. This makes it easier for the person who disposes to easily tear the seal portion S at the beginning, and makes it difficult to apply a strong force to the side
Furthermore, when two diagonally adjacent seal portions S are torn at the same time, the seal strength of one seal portion S becomes lower than the seal strength of the other seal portion S. As a result, the total seal strength of the two seal portions S can be kept low compared to the case where all seal portions S have the same seal strength. Therefore, even in the middle of tearing, the tearing force F by the disposal person is less likely to increase, and the load on the
As a result, tearing can be easily felt, and lateral tearing of the
In addition, since the seal strength of the seal line SL (for example, the third seal line SL3) on the outer side in the lateral direction Y can be set high, it is possible to prevent peeling during wearing and wearing operation.
Therefore, in the side
<シール強度の測定方法>
各シール列SLのシール部Sのシール強度の測定方法及び比較方法について説明する。
まず、複数のシール列SLを含むウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方を、縦方向Xに10mm、横方向Yにサイド接合部8の全幅を含む長さの長方形状に切り出して、測定用サンプルを形成する。サイド接合部8の全幅は、サイド接合部8の横方向Y外側の側縁から、最も横方向Y内側のシール部Sの横方向Y内側の内端部までの長さとする。測定用サンプルの横方向Yの長さは、テンシロンに固定する部分を確保するため、この全幅よりも横方向Y内側に20mm以上長いことが好ましい。切り出された複数の測定用サンプルは、熱可塑性シート50の積層枚数が同一のものとする。
続いて、測定用サンプルの横方向Y内側の端部を株式会社オリエンテック製のテンシロン万能試験機(RTC-1210A)に固定し、一方の外装体5から他方の外装体5を剥離する。測定用サンプルを横方向Y内側から外側に向かって10mm/minの速さで剥離し、経時的に剥離強度を測定する。
図5に、上述のようにシール強度を測定して得られたグラフの例を示す。図5において縦軸はシール強度(N)、横軸は横方向Y内側の剥離開始点からの距離を示す。
このグラフからは、複数のシール列SLに対応して、複数のピーク強度A,B,Cが確認できる。このピーク強度A,B,Cを、横方向Y内側から外側に沿って配置された、各シール列SLのシール部Sのシール強度とする。ピーク強度Cよりもピーク強度Bが低い場合、又はピーク強度Bよりもピーク強度Aが低い場合、場合、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有すると判定する。 <Method for measuring seal strength>
A method for measuring and comparing the seal strength of the seal portion S of each seal row SL will be described.
First, at least one of thewaist end region 8c and the leg end region 8d including a plurality of seal rows SL is cut into a rectangular shape having a length of 10 mm in the longitudinal direction X and a length including the full width of the side joint portion 8 in the lateral direction Y. to form a sample for measurement. The total width of the side joint portion 8 is the length from the outer side edge in the lateral direction Y of the side joint portion 8 to the inner end portion of the innermost laterally Y inner seal portion S in the lateral direction Y. The length of the measurement sample in the lateral direction Y is preferably 20 mm or more longer inward in the lateral direction Y than the entire width in order to secure a portion to be fixed to the tensilon. The plurality of cut out measurement samples are assumed to have the same laminated number of thermoplastic sheets 50 .
Subsequently, the inner end portion of the measurement sample in the lateral direction Y is fixed to a Tensilon universal tester (RTC-1210A) manufactured by Orientec Co., Ltd., and oneouter package 5 is separated from the other outer package 5 . The measurement sample is peeled from the inner side to the outer side in the lateral direction Y at a speed of 10 mm/min, and the peel strength is measured over time.
FIG. 5 shows an example of a graph obtained by measuring seal strength as described above. In FIG. 5, the vertical axis indicates the seal strength (N), and the horizontal axis indicates the distance from the peeling start point in the horizontal direction Y. As shown in FIG.
From this graph, a plurality of peak intensities A, B, and C can be confirmed corresponding to a plurality of seal rows SL. These peak strengths A, B, and C are the seal strengths of the seal portions S of each seal row SL arranged along the lateral direction Y from the inner side to the outer side. When the peak strength B is lower than the peak strength C, or when the peak strength A is lower than the peak strength B, the seal portion S positioned inside in the lateral direction Y is greater than the seal portion S positioned outside in the lateral direction Y. are also determined to have low seal strength.
各シール列SLのシール部Sのシール強度の測定方法及び比較方法について説明する。
まず、複数のシール列SLを含むウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方を、縦方向Xに10mm、横方向Yにサイド接合部8の全幅を含む長さの長方形状に切り出して、測定用サンプルを形成する。サイド接合部8の全幅は、サイド接合部8の横方向Y外側の側縁から、最も横方向Y内側のシール部Sの横方向Y内側の内端部までの長さとする。測定用サンプルの横方向Yの長さは、テンシロンに固定する部分を確保するため、この全幅よりも横方向Y内側に20mm以上長いことが好ましい。切り出された複数の測定用サンプルは、熱可塑性シート50の積層枚数が同一のものとする。
続いて、測定用サンプルの横方向Y内側の端部を株式会社オリエンテック製のテンシロン万能試験機(RTC-1210A)に固定し、一方の外装体5から他方の外装体5を剥離する。測定用サンプルを横方向Y内側から外側に向かって10mm/minの速さで剥離し、経時的に剥離強度を測定する。
図5に、上述のようにシール強度を測定して得られたグラフの例を示す。図5において縦軸はシール強度(N)、横軸は横方向Y内側の剥離開始点からの距離を示す。
このグラフからは、複数のシール列SLに対応して、複数のピーク強度A,B,Cが確認できる。このピーク強度A,B,Cを、横方向Y内側から外側に沿って配置された、各シール列SLのシール部Sのシール強度とする。ピーク強度Cよりもピーク強度Bが低い場合、又はピーク強度Bよりもピーク強度Aが低い場合、場合、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有すると判定する。 <Method for measuring seal strength>
A method for measuring and comparing the seal strength of the seal portion S of each seal row SL will be described.
First, at least one of the
Subsequently, the inner end portion of the measurement sample in the lateral direction Y is fixed to a Tensilon universal tester (RTC-1210A) manufactured by Orientec Co., Ltd., and one
FIG. 5 shows an example of a graph obtained by measuring seal strength as described above. In FIG. 5, the vertical axis indicates the seal strength (N), and the horizontal axis indicates the distance from the peeling start point in the horizontal direction Y. As shown in FIG.
From this graph, a plurality of peak intensities A, B, and C can be confirmed corresponding to a plurality of seal rows SL. These peak strengths A, B, and C are the seal strengths of the seal portions S of each seal row SL arranged along the lateral direction Y from the inner side to the outer side. When the peak strength B is lower than the peak strength C, or when the peak strength A is lower than the peak strength B, the seal portion S positioned inside in the lateral direction Y is greater than the seal portion S positioned outside in the lateral direction Y. are also determined to have low seal strength.
シール部Sのシール強度の具体例を挙げる。
最も横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sのシール強度は、廃棄時の引き裂きを容易にする観点から、好ましくは0.1N以上、より好ましくは0.2N以上であり、好ましくは2N以下、より好ましくは1.8N以下である。
最も横方向Y外側のシール列SL(例えば第3シール列SL3)のシール部Sのシール強度は、着用時及び着用動作時の剥がれを防止する観点から、好ましくは0.5N以上、より好ましくは0.7N以上であり、好ましくは5N以下、より好ましくは4N以下である。
最も横方向Y外側のシール列SL(例えば第3シール列SL3)のシール部Sのシール強度に対する最も横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sのシール強度の割合は、剥がれ防止と引き裂き容易性とを両立させる観点から、好ましくは5%以上、より好ましくは10%以上であり、好ましくは90%以下、より好ましくは80%以下である。 A specific example of the seal strength of the seal portion S will be given.
The seal strength of the seal portion S of the seal row SL (for example, the first seal row SL1) on the innermost side in the lateral direction Y is preferably 0.1 N or more, more preferably 0.2 N, from the viewpoint of facilitating tearing during disposal. or more, preferably 2N or less, more preferably 1.8N or less.
The seal strength of the seal portion S of the seal row SL on the outermost side in the lateral direction Y (for example, the third seal row SL3) is preferably 0.5 N or more, more preferably 0.5 N or more, from the viewpoint of preventing peeling during wearing and wearing. It is 0.7N or more, preferably 5N or less, more preferably 4N or less.
The ratio of the seal strength of the seal portion S of the innermost seal line SL (for example, the first seal line SL1) to the seal strength of the seal portion S of the seal line SL (for example, the third seal line SL3) that is the outermost in the lateral direction Y The ratio is preferably 5% or more, more preferably 10% or more, and preferably 90% or less, more preferably 80% or less, from the viewpoint of achieving both peeling prevention and tearability.
最も横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sのシール強度は、廃棄時の引き裂きを容易にする観点から、好ましくは0.1N以上、より好ましくは0.2N以上であり、好ましくは2N以下、より好ましくは1.8N以下である。
最も横方向Y外側のシール列SL(例えば第3シール列SL3)のシール部Sのシール強度は、着用時及び着用動作時の剥がれを防止する観点から、好ましくは0.5N以上、より好ましくは0.7N以上であり、好ましくは5N以下、より好ましくは4N以下である。
最も横方向Y外側のシール列SL(例えば第3シール列SL3)のシール部Sのシール強度に対する最も横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sのシール強度の割合は、剥がれ防止と引き裂き容易性とを両立させる観点から、好ましくは5%以上、より好ましくは10%以上であり、好ましくは90%以下、より好ましくは80%以下である。 A specific example of the seal strength of the seal portion S will be given.
The seal strength of the seal portion S of the seal row SL (for example, the first seal row SL1) on the innermost side in the lateral direction Y is preferably 0.1 N or more, more preferably 0.2 N, from the viewpoint of facilitating tearing during disposal. or more, preferably 2N or less, more preferably 1.8N or less.
The seal strength of the seal portion S of the seal row SL on the outermost side in the lateral direction Y (for example, the third seal row SL3) is preferably 0.5 N or more, more preferably 0.5 N or more, from the viewpoint of preventing peeling during wearing and wearing. It is 0.7N or more, preferably 5N or less, more preferably 4N or less.
The ratio of the seal strength of the seal portion S of the innermost seal line SL (for example, the first seal line SL1) to the seal strength of the seal portion S of the seal line SL (for example, the third seal line SL3) that is the outermost in the lateral direction Y The ratio is preferably 5% or more, more preferably 10% or more, and preferably 90% or less, more preferably 80% or less, from the viewpoint of achieving both peeling prevention and tearability.
[シール強度の調整方法の例]
シール部Sのシール強度は、例えば、シール部Sを形成するシール工程時の温度、圧力及び/又は時間等の条件を変更することによって調整することができる。
あるいは、当該シール強度は、熱可塑性シート50間に、樹脂の溶融を阻害する溶融阻害剤を配置することによっても低下させることができる。溶融阻害剤としては、ホットメルト接着剤、ポリウレタン系素剤、石油系樹脂等が挙げられる。
また、当該シール強度は、繊維の融着部であるシール部Sの面積を変更することによって調整することもできる。
また、当該シール強度は、熱可塑性シート50の繊維の組成を変更することでも、調整することができる。
以下、具体例を挙げて説明する。 [Example of method for adjusting seal strength]
The seal strength of the seal portion S can be adjusted, for example, by changing conditions such as temperature, pressure and/or time during the sealing process for forming the seal portion S.
Alternatively, the seal strength can be reduced by disposing a melting inhibitor between thethermoplastic sheets 50 to inhibit melting of the resin. Melting inhibitors include hot-melt adhesives, polyurethane-based materials, petroleum-based resins, and the like.
The seal strength can also be adjusted by changing the area of the seal portion S, which is the fused portion of the fibers.
The seal strength can also be adjusted by changing the fiber composition of thethermoplastic sheet 50 .
Specific examples will be described below.
シール部Sのシール強度は、例えば、シール部Sを形成するシール工程時の温度、圧力及び/又は時間等の条件を変更することによって調整することができる。
あるいは、当該シール強度は、熱可塑性シート50間に、樹脂の溶融を阻害する溶融阻害剤を配置することによっても低下させることができる。溶融阻害剤としては、ホットメルト接着剤、ポリウレタン系素剤、石油系樹脂等が挙げられる。
また、当該シール強度は、繊維の融着部であるシール部Sの面積を変更することによって調整することもできる。
また、当該シール強度は、熱可塑性シート50の繊維の組成を変更することでも、調整することができる。
以下、具体例を挙げて説明する。 [Example of method for adjusting seal strength]
The seal strength of the seal portion S can be adjusted, for example, by changing conditions such as temperature, pressure and/or time during the sealing process for forming the seal portion S.
Alternatively, the seal strength can be reduced by disposing a melting inhibitor between the
The seal strength can also be adjusted by changing the area of the seal portion S, which is the fused portion of the fibers.
The seal strength can also be adjusted by changing the fiber composition of the
Specific examples will be described below.
(繊維の溶融度合いによる調整例)
シール部Sは、外装体5の複数の熱可塑性シート50の繊維が融着して形成された部分である。このため、繊維が十分に溶融しているシール部Sほど、冷却後に繊維同士が固着し、シール強度が高くなる傾向を有する。
このため、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、繊維の溶融度合いが低いことが好ましい。例えば、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sの溶融度合いが増加することが好ましい。
例えば、シール部Sの繊維の溶融度合いは、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及び最も外側の第3シール列SL3の順に高くなる。 (Example of adjustment by melting degree of fibers)
The seal portion S is a portion formed by fusing fibers of a plurality ofthermoplastic sheets 50 of the exterior body 5 . For this reason, in the sealing portion S in which the fibers are sufficiently melted, the fibers tend to adhere to each other after cooling, and the sealing strength tends to be high.
Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent to each other in the horizontal direction Y, the seal portion S that is located inside in the horizontal direction Y has a higher fiber density than the seal portion S that is located outside in the horizontal direction Y. A low degree of melting is preferred. For example, it is preferable that the degree of melting of the seal portions S increases from the seal row SL on the inner side in the lateral direction Y toward the seal row SL on the outer side.
For example, the melting degree of the fibers of the seal portion S increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
シール部Sは、外装体5の複数の熱可塑性シート50の繊維が融着して形成された部分である。このため、繊維が十分に溶融しているシール部Sほど、冷却後に繊維同士が固着し、シール強度が高くなる傾向を有する。
このため、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、繊維の溶融度合いが低いことが好ましい。例えば、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sの溶融度合いが増加することが好ましい。
例えば、シール部Sの繊維の溶融度合いは、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及び最も外側の第3シール列SL3の順に高くなる。 (Example of adjustment by melting degree of fibers)
The seal portion S is a portion formed by fusing fibers of a plurality of
Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent to each other in the horizontal direction Y, the seal portion S that is located inside in the horizontal direction Y has a higher fiber density than the seal portion S that is located outside in the horizontal direction Y. A low degree of melting is preferred. For example, it is preferable that the degree of melting of the seal portions S increases from the seal row SL on the inner side in the lateral direction Y toward the seal row SL on the outer side.
For example, the melting degree of the fibers of the seal portion S increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
<シール部の溶融度合いの算出方法>
まず、サイド接合部8のシール列SLを含むウエスト端部領域8c及び/又はレッグ端部領域8dを切断して、シール部SのX-Z断面(シール部Sを縦方向Xに横切る断面)を含む測定用サンプルを準備する。測定対象とするシール部Sは、各シール列SLに属するシール部Sであって、熱可塑性シート50の積層枚数が同一の領域に位置するシール部Sとする。
測定用サンプルを公知の方法によって固定した後、測定用サンプルのX-Z断面を、走査電子顕微鏡(SEM:Scanning Electron Microscope)によって500倍に拡大して撮像する。撮像された各画像において、画像解析ソフトを用いて繊維の外縁を検出し、検出した線の長さを繊維の周長として算出する。各シール列SLについて、5枚以上の画像から算出された繊維の周長の平均値を算出し、その平均値を各シール列SLのシール部Sの繊維の周長とする。
複数のシール列SLのシール部Sの繊維の周長を比較し、繊維の周長が長いほど、溶融度合いが低いと判定する。 <Method for calculating the degree of melting of the seal>
First, thewaist end region 8c and/or the leg end region 8d including the seal row SL of the side joint portion 8 are cut, and an XZ cross section of the seal portion S (a cross section crossing the seal portion S in the longitudinal direction X) is obtained. Prepare a sample for measurement containing The seal portions S to be measured are the seal portions S belonging to each seal line SL, and the seal portions S located in the region where the number of laminated thermoplastic sheets 50 is the same.
After fixing the measurement sample by a known method, the XZ cross section of the measurement sample is imaged with a scanning electron microscope (SEM) at a magnification of 500 times. In each captured image, image analysis software is used to detect the outer edge of the fiber, and the length of the detected line is calculated as the perimeter of the fiber. For each seal row SL, the average value of the fiber perimeters calculated from five or more images is calculated, and the average value is taken as the fiber perimeter of the seal portion S of each seal row SL.
The perimeters of the fibers of the seal portions S of the plurality of seal rows SL are compared, and it is determined that the longer the perimeter of the fiber, the lower the degree of melting.
まず、サイド接合部8のシール列SLを含むウエスト端部領域8c及び/又はレッグ端部領域8dを切断して、シール部SのX-Z断面(シール部Sを縦方向Xに横切る断面)を含む測定用サンプルを準備する。測定対象とするシール部Sは、各シール列SLに属するシール部Sであって、熱可塑性シート50の積層枚数が同一の領域に位置するシール部Sとする。
測定用サンプルを公知の方法によって固定した後、測定用サンプルのX-Z断面を、走査電子顕微鏡(SEM:Scanning Electron Microscope)によって500倍に拡大して撮像する。撮像された各画像において、画像解析ソフトを用いて繊維の外縁を検出し、検出した線の長さを繊維の周長として算出する。各シール列SLについて、5枚以上の画像から算出された繊維の周長の平均値を算出し、その平均値を各シール列SLのシール部Sの繊維の周長とする。
複数のシール列SLのシール部Sの繊維の周長を比較し、繊維の周長が長いほど、溶融度合いが低いと判定する。 <Method for calculating the degree of melting of the seal>
First, the
After fixing the measurement sample by a known method, the XZ cross section of the measurement sample is imaged with a scanning electron microscope (SEM) at a magnification of 500 times. In each captured image, image analysis software is used to detect the outer edge of the fiber, and the length of the detected line is calculated as the perimeter of the fiber. For each seal row SL, the average value of the fiber perimeters calculated from five or more images is calculated, and the average value is taken as the fiber perimeter of the seal portion S of each seal row SL.
The perimeters of the fibers of the seal portions S of the plurality of seal rows SL are compared, and it is determined that the longer the perimeter of the fiber, the lower the degree of melting.
図6(A)は、横方向Y内側のシール列SLに属するシール部SのX-Z断面の拡大図の例を示し、図6(B)は、横方向Y外側のシール列SLに属するシール部SのX-Z断面の拡大図の例を示す。
図6(A)の繊維55は、外縁55aに多くの凹凸を含み、周長が長い。つまり、繊維55があまり溶融されておらず、表面である外縁55aに、繊維55の本来の凹凸が残っている。
一方で、図6(B)の繊維55は、外縁55aが比較的平滑であり、図6(A)の繊維55よりも周長が短い。つまり、繊維55が十分に溶融されており、外縁55aの凹凸が平滑化されている。
この場合、図6(A)のシール部Sの繊維55の溶融度合いは、図6(B)のシール部Sの繊維55の溶融度合いよりも低いと判定される。 FIG. 6A shows an example of an enlarged view of the XZ cross section of the seal portion S belonging to the seal row SL on the inside in the lateral direction Y, and FIG. 6B shows an example of an enlarged view of the seal row SL on the outside in the lateral direction Y. An example of an enlarged view of the XZ cross section of the seal portion S is shown.
Thefiber 55 shown in FIG. 6(A) includes many irregularities on the outer edge 55a and has a long circumference. That is, the fibers 55 are not melted so much, and the original unevenness of the fibers 55 remains on the outer edge 55a which is the surface.
On the other hand, thefiber 55 in FIG. 6B has a relatively smooth outer edge 55a and a shorter circumference than the fiber 55 in FIG. 6A. That is, the fibers 55 are sufficiently melted, and the unevenness of the outer edge 55a is smoothed.
In this case, it is determined that the degree of melting of thefibers 55 in the seal portion S in FIG. 6A is lower than the degree of melting of the fibers 55 in the seal portion S in FIG. 6B.
図6(A)の繊維55は、外縁55aに多くの凹凸を含み、周長が長い。つまり、繊維55があまり溶融されておらず、表面である外縁55aに、繊維55の本来の凹凸が残っている。
一方で、図6(B)の繊維55は、外縁55aが比較的平滑であり、図6(A)の繊維55よりも周長が短い。つまり、繊維55が十分に溶融されており、外縁55aの凹凸が平滑化されている。
この場合、図6(A)のシール部Sの繊維55の溶融度合いは、図6(B)のシール部Sの繊維55の溶融度合いよりも低いと判定される。 FIG. 6A shows an example of an enlarged view of the XZ cross section of the seal portion S belonging to the seal row SL on the inside in the lateral direction Y, and FIG. 6B shows an example of an enlarged view of the seal row SL on the outside in the lateral direction Y. An example of an enlarged view of the XZ cross section of the seal portion S is shown.
The
On the other hand, the
In this case, it is determined that the degree of melting of the
繊維の溶融度合いは、シール工程時の熱、圧力及び/又は時間等の条件によって調整することができる。繊維の溶融度合いによってシール強度を調整することで、シール部Sの平面形状、配置又は厚みを大きく変更しなくても、シール強度を調整することができる。シール部Sの平面形状や配置を揃えることで、引き裂き時に、シール部Sをほぼ一定の間隔で次々に引き裂くことができる。したがって、引き裂き動作を安定して滑らかに行うことができ、廃棄者のストレスを軽減することができる。
また、シール列SL毎に熱可塑性シート50の繊維の組成を変更しなくても、繊維の溶融度合いは変更可能である。これにより、比較的容易に、かつ精度よくシール強度を調整することができる。 The degree of melting of the fibers can be adjusted by conditions such as heat, pressure and/or time during the sealing process. By adjusting the sealing strength according to the degree of fusion of the fibers, the sealing strength can be adjusted without significantly changing the planar shape, arrangement, or thickness of the sealing portion S. By aligning the planar shape and arrangement of the seal portions S, the seal portions S can be torn one after another at substantially constant intervals when tearing. Therefore, the tearing operation can be stably and smoothly performed, and the stress of the disposal person can be reduced.
Further, the melting degree of the fibers can be changed without changing the composition of the fibers of thethermoplastic sheet 50 for each seal row SL. Thereby, the seal strength can be adjusted relatively easily and accurately.
また、シール列SL毎に熱可塑性シート50の繊維の組成を変更しなくても、繊維の溶融度合いは変更可能である。これにより、比較的容易に、かつ精度よくシール強度を調整することができる。 The degree of melting of the fibers can be adjusted by conditions such as heat, pressure and/or time during the sealing process. By adjusting the sealing strength according to the degree of fusion of the fibers, the sealing strength can be adjusted without significantly changing the planar shape, arrangement, or thickness of the sealing portion S. By aligning the planar shape and arrangement of the seal portions S, the seal portions S can be torn one after another at substantially constant intervals when tearing. Therefore, the tearing operation can be stably and smoothly performed, and the stress of the disposal person can be reduced.
Further, the melting degree of the fibers can be changed without changing the composition of the fibers of the
最も横方向Y外側のシール列SL(例えば第3シール列SL3)のシール部Sの繊維の周長に対する、最も横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sの繊維の周長の割合は、好ましくは105%以上、より好ましくは110%以上であり、好ましくは300%以下、より好ましくは200%以下である。
The seal portion S of the innermost seal row SL in the lateral direction Y (for example, the first seal row SL1) with respect to the fiber circumference of the seal portion S of the seal portion S in the outermost seal row SL in the lateral direction Y (for example, the third seal row SL3) The fiber perimeter ratio is preferably 105% or more, more preferably 110% or more, and preferably 300% or less, more preferably 200% or less.
(シール部の厚みによる調整例)
また、シール工程時に重ねられた熱可塑性シート50を厚み方向Zに大きく圧縮することで、溶融した繊維が強く圧着され、シール部Sのシール強度を高めることができる。つまり、シール部Sの厚みが薄いほど、シール強度は高くなる。
このため、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、厚く構成されてもよい。例えば、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sの厚みが減少することが好ましい。なお、ここでいうシール部Sの厚みは、厚み方向Zに沿った厚みである。
例えば、シール部Sの厚みは、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及び最も外側の第3シール列SL3の順に薄くなる。 (Example of adjustment by thickness of seal part)
Further, by greatly compressing the superimposedthermoplastic sheets 50 in the thickness direction Z during the sealing process, the melted fibers are strongly crimped, and the sealing strength of the sealing portion S can be increased. That is, the thinner the seal portion S, the higher the seal strength.
Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S located inside in the lateral direction Y is configured to be thicker than the seal portion S located outside in the lateral direction Y. may be For example, it is preferable that the thickness of the seal portion S decreases from the seal row SL on the inner side in the lateral direction Y toward the seal row SL on the outer side. The thickness of the seal portion S referred to here is the thickness along the thickness direction Z. As shown in FIG.
For example, the thickness of the seal portion S decreases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
また、シール工程時に重ねられた熱可塑性シート50を厚み方向Zに大きく圧縮することで、溶融した繊維が強く圧着され、シール部Sのシール強度を高めることができる。つまり、シール部Sの厚みが薄いほど、シール強度は高くなる。
このため、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、厚く構成されてもよい。例えば、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sの厚みが減少することが好ましい。なお、ここでいうシール部Sの厚みは、厚み方向Zに沿った厚みである。
例えば、シール部Sの厚みは、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及び最も外側の第3シール列SL3の順に薄くなる。 (Example of adjustment by thickness of seal part)
Further, by greatly compressing the superimposed
Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S located inside in the lateral direction Y is configured to be thicker than the seal portion S located outside in the lateral direction Y. may be For example, it is preferable that the thickness of the seal portion S decreases from the seal row SL on the inner side in the lateral direction Y toward the seal row SL on the outer side. The thickness of the seal portion S referred to here is the thickness along the thickness direction Z. As shown in FIG.
For example, the thickness of the seal portion S decreases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
<シール部の厚みの測定方法>
まず、サイド接合部8のシール列SLを含むウエスト端部領域8c及び/又はレッグ端部領域8dを切断して、シール部SのX-Z断面(シール部Sを縦方向Xに横切る断面)を含む測定用サンプルを準備する。測定対象とするシール部Sは、各シール列SLに属するシール部Sであって、熱可塑性シート50の積層枚数が同一の領域に位置するシール部Sとする。測定用サンプルを公知の方法によって固定した後、測定用サンプルのX-Z断面を、SEM等によって500倍に拡大して撮像する。そして、図4に示すように、撮像された画像中の陥凹している部分をシール部Sと定める。画像解析ソフトを用いて、このシール部Sを幅方向(縦方向X)に2等分する部分の厚み方向Zの厚みDs(図4参照)を、シール部Sの厚みとして算出する。各シール列SLについて、5枚以上の画像から算出されたシール部Sの厚みの平均値を算出し、その平均値を各シール列SLのシール部Sの厚みとする。 <Method for measuring the thickness of the seal>
First, thewaist end region 8c and/or the leg end region 8d including the seal row SL of the side joint portion 8 are cut, and an XZ cross section of the seal portion S (a cross section crossing the seal portion S in the longitudinal direction X) is obtained. Prepare a sample for measurement containing The seal portions S to be measured are the seal portions S belonging to each seal line SL, and the seal portions S located in the region where the number of laminated thermoplastic sheets 50 is the same. After fixing the measurement sample by a known method, the XZ cross section of the measurement sample is imaged by SEM or the like at a magnification of 500 times. Then, as shown in FIG. 4, the recessed portion in the captured image is defined as the seal portion S. As shown in FIG. Using image analysis software, the thickness Ds (see FIG. 4) in the thickness direction Z of the portion that bisects the seal portion S in the width direction (longitudinal direction X) is calculated as the thickness of the seal portion S. For each seal line SL, an average value of the thickness of the seal portion S calculated from five or more images is calculated, and the average value is used as the thickness of the seal portion S of each seal line SL.
まず、サイド接合部8のシール列SLを含むウエスト端部領域8c及び/又はレッグ端部領域8dを切断して、シール部SのX-Z断面(シール部Sを縦方向Xに横切る断面)を含む測定用サンプルを準備する。測定対象とするシール部Sは、各シール列SLに属するシール部Sであって、熱可塑性シート50の積層枚数が同一の領域に位置するシール部Sとする。測定用サンプルを公知の方法によって固定した後、測定用サンプルのX-Z断面を、SEM等によって500倍に拡大して撮像する。そして、図4に示すように、撮像された画像中の陥凹している部分をシール部Sと定める。画像解析ソフトを用いて、このシール部Sを幅方向(縦方向X)に2等分する部分の厚み方向Zの厚みDs(図4参照)を、シール部Sの厚みとして算出する。各シール列SLについて、5枚以上の画像から算出されたシール部Sの厚みの平均値を算出し、その平均値を各シール列SLのシール部Sの厚みとする。 <Method for measuring the thickness of the seal>
First, the
最も横方向Y外側のシール列SL(例えば第3シール列SL3)のシール部Sの厚みに対する最も横方向Y内側のシール列SL(例えば第1シール列SL1)のシール部Sの厚みの割合は、好ましくは102%以上、より好ましくは104%以上であり、好ましくは200%以下、より好ましくは180%以下である。
The ratio of the thickness of the seal portion S of the innermost seal row SL (for example, the first seal row SL1) to the thickness of the seal portion S of the seal row SL that is the outermost in the transverse direction Y (for example, the third seal row SL3) is , preferably 102% or more, more preferably 104% or more, preferably 200% or less, more preferably 180% or less.
(シール部の面積による調整例)
あるいは、シール部Sのシール強度は、シール部Sの面積によっても調整することができる。具体的には、シール部Sの面積が小さいほど、繊維の融着部の面積が小さくなり、シール強度は低くなる。
このため、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、小さな面積を有していてもよい。例えば、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sの面積が増加してもよい。ここでいうシール部Sの面積は、平面視における1つのシール部Sの面積である。比較対象とするシール部Sは、ウエスト端部領域8c及び/又はレッグ端部領域8dの各シール列SLに属するシール部Sとする。同一のシール列SL内において、シール部Sの平面形状が異なる場合には、1つのシール列SL内の測定対象の端部領域に位置する任意の5個のシール部Sの平均面積を、そのシール列のシール部Sの面積とする。
例えば、シール部Sの面積は、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及び最も外側の第3シール列SL3の順に大きくなることが好ましい。 (Example of adjustment based on the area of the seal)
Alternatively, the seal strength of the seal portion S can be adjusted by the area of the seal portion S as well. Specifically, the smaller the area of the seal portion S, the smaller the area of the fused portion of the fibers, and the lower the seal strength.
Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S positioned inside in the lateral direction Y has a smaller area than the seal portion S positioned outside in the lateral direction Y. may have For example, the area of the seal portion S may increase from the inner seal row SL in the lateral direction Y toward the outer seal row SL. The area of the seal portion S referred to here is the area of one seal portion S in plan view. The seal portions S to be compared are the seal portions S belonging to each seal line SL of thewaist end region 8c and/or the leg end region 8d. If the planar shapes of the seal portions S are different within the same seal line SL, the average area of any five seal portions S located in the end region to be measured within one seal line SL is The area of the seal portion S of the seal row.
For example, the area of the seal portion S preferably increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
あるいは、シール部Sのシール強度は、シール部Sの面積によっても調整することができる。具体的には、シール部Sの面積が小さいほど、繊維の融着部の面積が小さくなり、シール強度は低くなる。
このため、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、小さな面積を有していてもよい。例えば、横方向Y内側のシール列SLから外側のシール列SLに向かって、シール部Sの面積が増加してもよい。ここでいうシール部Sの面積は、平面視における1つのシール部Sの面積である。比較対象とするシール部Sは、ウエスト端部領域8c及び/又はレッグ端部領域8dの各シール列SLに属するシール部Sとする。同一のシール列SL内において、シール部Sの平面形状が異なる場合には、1つのシール列SL内の測定対象の端部領域に位置する任意の5個のシール部Sの平均面積を、そのシール列のシール部Sの面積とする。
例えば、シール部Sの面積は、横方向Yにおいて最も内側の第1シール列SL1、その外側の第2シール列SL2、及び最も外側の第3シール列SL3の順に大きくなることが好ましい。 (Example of adjustment based on the area of the seal)
Alternatively, the seal strength of the seal portion S can be adjusted by the area of the seal portion S as well. Specifically, the smaller the area of the seal portion S, the smaller the area of the fused portion of the fibers, and the lower the seal strength.
Therefore, of the two seal portions S that belong to different seal rows SL and are adjacent in the lateral direction Y, the seal portion S positioned inside in the lateral direction Y has a smaller area than the seal portion S positioned outside in the lateral direction Y. may have For example, the area of the seal portion S may increase from the inner seal row SL in the lateral direction Y toward the outer seal row SL. The area of the seal portion S referred to here is the area of one seal portion S in plan view. The seal portions S to be compared are the seal portions S belonging to each seal line SL of the
For example, the area of the seal portion S preferably increases in the horizontal direction Y in the order of the innermost first seal row SL1, the outermost second seal row SL2, and the outermost third seal row SL3.
これにより、シール列SL毎にシール工程の条件を変更することなく、シールパターンを変更することで、シール部Sのシール強度を調整することができる。したがって、横方向Y内側の第1シール列SL1内におけるシール部Sのシール強度をより安定して低下させることができる。
Thereby, the seal strength of the seal portion S can be adjusted by changing the seal pattern without changing the conditions of the sealing process for each seal row SL. Therefore, the seal strength of the seal portion S within the first seal row SL1 on the inner side in the lateral direction Y can be reduced more stably.
[シール部の配置例]
横方向Yに隣り合う2つのシール列SLにおける、シール部Sのより具体的な配置例について説明する。
例えば、図7に示すように、横方向Yにおいて最も外側に位置するシール列SLを外側シール列SLb、外側シール列SLbと横方向Y内側に隣り合うシール列SLを内側シール列SLaとした場合に、外側シール列SLbのシール部Sの横方向Y外側の外端部Sbと、内側シール列SLaのシール部Sの横方向Y内側の内端部Saとの間の横方向Yにおける距離が第1寸法D1であるとする。
サイド接合部8全体のシール強度を高めて、着用時及び着用動作時の破れを抑制する観点からは、縦方向Xに長いサイド接合部8内に、縦方向Xに沿って多数のシール部Sを配置することが好ましい。
このため、外側シール列SLbでは、複数のシール部Sが縦方向Xに第1寸法D1よりも狭い第2寸法D2の間隔をあけて配置されていることが好ましい。
サイド接合部8の横方向Yの幅はある程度規制されるため、第1寸法D1もこれに応じて規制される。この第1寸法D1を基準として、外側シール列SLbの縦方向Xの間隔を第1寸法D1よりも狭い第2寸法D2とすることで、縦方向Xに沿ってシール強度の高いシール部Sを密に配置することができ、サイド接合部8の接合強度を十分に確保することができる。 [Example of seal arrangement]
A more specific arrangement example of the seal portions S in two seal rows SL adjacent to each other in the lateral direction Y will be described.
For example, as shown in FIG. 7, when the outermost seal row SL in the lateral direction Y is the outermost seal row SLb, and the inner seal row SLa is the seal row SL adjacent to the outer seal row SLb on the inner side in the lateral direction Y. Further, the distance in the lateral direction Y between the outer end Sb of the seal portion S of the outer seal row SLb in the lateral direction Y and the inner end Sa of the seal portion S of the inner seal row SLa in the lateral direction Y is Let the first dimension be D1.
From the viewpoint of increasing the sealing strength of the entire sidejoint portion 8 and suppressing tearing during wearing and wearing operation, a large number of seal portions S are provided along the longitudinal direction X in the side joint portion 8 that is long in the longitudinal direction X. is preferably placed.
For this reason, in the outer seal row SLb, it is preferable that the plurality of seal portions S are arranged in the vertical direction X at intervals of a second dimension D2 that is narrower than the first dimension D1.
Since the width of the sidejoint portion 8 in the lateral direction Y is restricted to some extent, the first dimension D1 is also restricted accordingly. Using this first dimension D1 as a reference, the distance between the outer seal rows SLb in the longitudinal direction X is set to a second dimension D2 narrower than the first dimension D1, thereby forming a seal portion S having a high seal strength along the longitudinal direction X. They can be arranged densely, and the joint strength of the side joints 8 can be sufficiently secured.
横方向Yに隣り合う2つのシール列SLにおける、シール部Sのより具体的な配置例について説明する。
例えば、図7に示すように、横方向Yにおいて最も外側に位置するシール列SLを外側シール列SLb、外側シール列SLbと横方向Y内側に隣り合うシール列SLを内側シール列SLaとした場合に、外側シール列SLbのシール部Sの横方向Y外側の外端部Sbと、内側シール列SLaのシール部Sの横方向Y内側の内端部Saとの間の横方向Yにおける距離が第1寸法D1であるとする。
サイド接合部8全体のシール強度を高めて、着用時及び着用動作時の破れを抑制する観点からは、縦方向Xに長いサイド接合部8内に、縦方向Xに沿って多数のシール部Sを配置することが好ましい。
このため、外側シール列SLbでは、複数のシール部Sが縦方向Xに第1寸法D1よりも狭い第2寸法D2の間隔をあけて配置されていることが好ましい。
サイド接合部8の横方向Yの幅はある程度規制されるため、第1寸法D1もこれに応じて規制される。この第1寸法D1を基準として、外側シール列SLbの縦方向Xの間隔を第1寸法D1よりも狭い第2寸法D2とすることで、縦方向Xに沿ってシール強度の高いシール部Sを密に配置することができ、サイド接合部8の接合強度を十分に確保することができる。 [Example of seal arrangement]
A more specific arrangement example of the seal portions S in two seal rows SL adjacent to each other in the lateral direction Y will be described.
For example, as shown in FIG. 7, when the outermost seal row SL in the lateral direction Y is the outermost seal row SLb, and the inner seal row SLa is the seal row SL adjacent to the outer seal row SLb on the inner side in the lateral direction Y. Further, the distance in the lateral direction Y between the outer end Sb of the seal portion S of the outer seal row SLb in the lateral direction Y and the inner end Sa of the seal portion S of the inner seal row SLa in the lateral direction Y is Let the first dimension be D1.
From the viewpoint of increasing the sealing strength of the entire side
For this reason, in the outer seal row SLb, it is preferable that the plurality of seal portions S are arranged in the vertical direction X at intervals of a second dimension D2 that is narrower than the first dimension D1.
Since the width of the side
一方で、引き裂き開始時には、縦方向X中央に向かう成分及び横方向Y外側に向かう成分を含む斜め方向の力Fが加わる。引き裂き開始側のウエスト端部領域8c又はレッグ端部領域8dにおける引き裂きは、この力Fの方向に沿って進行するため、これと直交する方向に沿って剥離界面が移動する。つまり、剥離界面は、縦方向X中央に向かう成分及び横方向Y内側に向かう成分を含む方向に沿った線L上に形成される。線Lは、縦方向X及び横方向Yに対しておよそ45°傾いている。
図7に示すように、D1>D2を満たす配置では、複数のシール部Sが線L上に配置され、これらのシール部Sが同時に引き裂かれることになる。つまり、引き裂き時には、これらのシール部Sの合計のシール強度以上の力が確実に必要となる。 On the other hand, at the start of tearing, an oblique force F including a component directed toward the center in the vertical direction X and a component directed toward the outer side in the horizontal direction Y is applied. Since the tear at thewaist end region 8c or the leg end region 8d on the tear initiation side progresses along the direction of this force F, the peel interface moves along the direction orthogonal to this. That is, the separation interface is formed on the line L along the direction including the component toward the center in the vertical direction X and the component toward the inner side in the horizontal direction Y. The line L is inclined at approximately 45° with respect to the vertical direction X and the horizontal direction Y. As shown in FIG.
As shown in FIG. 7, in an arrangement that satisfies D1>D2, a plurality of seal portions S are arranged on line L, and these seal portions S are torn at the same time. That is, when tearing, a force greater than the total seal strength of these seal portions S is surely required.
図7に示すように、D1>D2を満たす配置では、複数のシール部Sが線L上に配置され、これらのシール部Sが同時に引き裂かれることになる。つまり、引き裂き時には、これらのシール部Sの合計のシール強度以上の力が確実に必要となる。 On the other hand, at the start of tearing, an oblique force F including a component directed toward the center in the vertical direction X and a component directed toward the outer side in the horizontal direction Y is applied. Since the tear at the
As shown in FIG. 7, in an arrangement that satisfies D1>D2, a plurality of seal portions S are arranged on line L, and these seal portions S are torn at the same time. That is, when tearing, a force greater than the total seal strength of these seal portions S is surely required.
これに対して、本実施形態では、内側シール列SLaのシール部Sのシール強度が、外側シール列SLbのシール部Sのシール強度よりも小さい。このため、2つのシール部Sの合計のシール強度の上昇を抑制でき、弱い力で引き裂くことができる。また、外装体5に局所的に大きな力が負荷されることを抑制でき、外装体5の横裂けを効果的に防止できる。
On the other hand, in the present embodiment, the seal strength of the seal portions S of the inner seal row SLa is smaller than the seal strength of the seal portions S of the outer seal row SLb. Therefore, an increase in the total seal strength of the two seal portions S can be suppressed, and tearing can be performed with a weak force. In addition, it is possible to suppress the local application of a large force to the exterior body 5, and effectively prevent the exterior body 5 from being laterally torn.
シール部Sのより具体的な配置について説明する。
図3に示すように、複数のシール列SLに含まれる複数のシール部Sは、横方向Yに沿って整列していることが好ましい。つまり、シール列SLが配置されたウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方におけるシール部Sは、縦方向X及び横方向Yに沿って整列した、格子状の配置となることが好ましい。
「複数のシール部Sが横方向Yに沿って整列している」とは、複数のシール部Sが、横方向Yに延びる一本の直線上に整列して配置されることを意味する。具体的に、各シール部Sを縦方向Xに2等分する直線のずれが、シール部Sの縦方向Xにおける寸法の50%以内に収まることが好ましい。 A more specific arrangement of the seal portion S will be described.
As shown in FIG. 3, the plurality of seal portions S included in the plurality of seal rows SL are preferably aligned along the lateral direction Y. As shown in FIG. That is, the seal portions S in at least one of thewaist end region 8c and the leg end region 8d in which the seal rows SL are arranged may be arranged in a grid pattern aligned along the longitudinal direction X and the lateral direction Y. preferable.
“A plurality of seal portions S are aligned along the horizontal direction Y” means that the plurality of seal portions S are aligned and arranged on a straight line extending in the horizontal direction Y. Specifically, it is preferable that the deviation of the straight line that bisects each seal portion S in the longitudinal direction X is within 50% of the dimension of the seal portion S in the longitudinal direction X.
図3に示すように、複数のシール列SLに含まれる複数のシール部Sは、横方向Yに沿って整列していることが好ましい。つまり、シール列SLが配置されたウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方におけるシール部Sは、縦方向X及び横方向Yに沿って整列した、格子状の配置となることが好ましい。
「複数のシール部Sが横方向Yに沿って整列している」とは、複数のシール部Sが、横方向Yに延びる一本の直線上に整列して配置されることを意味する。具体的に、各シール部Sを縦方向Xに2等分する直線のずれが、シール部Sの縦方向Xにおける寸法の50%以内に収まることが好ましい。 A more specific arrangement of the seal portion S will be described.
As shown in FIG. 3, the plurality of seal portions S included in the plurality of seal rows SL are preferably aligned along the lateral direction Y. As shown in FIG. That is, the seal portions S in at least one of the
“A plurality of seal portions S are aligned along the horizontal direction Y” means that the plurality of seal portions S are aligned and arranged on a straight line extending in the horizontal direction Y. Specifically, it is preferable that the deviation of the straight line that bisects each seal portion S in the longitudinal direction X is within 50% of the dimension of the seal portion S in the longitudinal direction X.
上記構成では、シール部Sが規則的に並ぶため、シール強度が規則的に変動し得る。これにより、引き裂き時に廃棄者が受ける抗力も規則的に変動しやすくなり、廃棄者が引き裂きをより滑らかに、かつ楽に行うことができる。
In the above configuration, since the seal portions S are regularly arranged, the seal strength may fluctuate regularly. As a result, the drag force that the disposal person receives during tearing tends to fluctuate regularly, and the disposal person can tear the sheet more smoothly and easily.
また、サイド接合部8では、シール部Sの周囲にシールされていない部分が配置される。廃棄者がサイド接合部8を連続的に引き裂こうとした場合、シール部Sとその周囲部とで受ける抗力の差が大きすぎると、引き裂き動作に違和感を持ちやすくなる。
このような引き裂き動作の違和感を抑制する観点から、複数のシール列SLを含むウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方を、縦方向Xに10mm、横方向Yにサイド接合部8の全幅を含む長さの長方形状に切り出して測定用サンプルを形成し、測定用サンプルを横方向Y内側から外側に向かって10mm/minの速さで剥離させてシール強度を測定した場合、複数のシール列SLに対応する複数のピーク強度間の最小強度が、0Nよりも大きくなることが好ましい。この測定方法は、上述のシール強度の測定方法において説明した方法を用いることができる。
また、上記構成は、シール部Sの横方向Yのシール幅に比べてシール列SLの横方向Yのシール部S間の距離を短くすることで達成できる。 In addition, in the sidejoint portion 8, a non-sealed portion is arranged around the seal portion S. As shown in FIG. When the disposal person tries to tear the side joint portion 8 continuously, if the difference in resistance received between the seal portion S and its surrounding portion is too large, the tearing operation tends to feel uncomfortable.
From the viewpoint of suppressing the discomfort of such a tearing action, at least one of thewaist end region 8c and the leg end region 8d including the plurality of seal rows SL is 10 mm in the longitudinal direction X and the side joints 8 are 10 mm in the lateral direction Y. When measuring the seal strength by cutting out a rectangular shape with a length including the full width of the measurement sample and peeling the measurement sample from the inside to the outside in the lateral direction Y at a speed of 10 mm / min, It is preferable that the minimum intensity between the plurality of peak intensities corresponding to the seal rows SL of 1 is greater than 0N. As this measuring method, the method described in the above-described method for measuring seal strength can be used.
Moreover, the above configuration can be achieved by making the distance between the seal portions S in the lateral direction Y of the seal row SL shorter than the seal width of the seal portions S in the lateral direction Y.
このような引き裂き動作の違和感を抑制する観点から、複数のシール列SLを含むウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方を、縦方向Xに10mm、横方向Yにサイド接合部8の全幅を含む長さの長方形状に切り出して測定用サンプルを形成し、測定用サンプルを横方向Y内側から外側に向かって10mm/minの速さで剥離させてシール強度を測定した場合、複数のシール列SLに対応する複数のピーク強度間の最小強度が、0Nよりも大きくなることが好ましい。この測定方法は、上述のシール強度の測定方法において説明した方法を用いることができる。
また、上記構成は、シール部Sの横方向Yのシール幅に比べてシール列SLの横方向Yのシール部S間の距離を短くすることで達成できる。 In addition, in the side
From the viewpoint of suppressing the discomfort of such a tearing action, at least one of the
Moreover, the above configuration can be achieved by making the distance between the seal portions S in the lateral direction Y of the seal row SL shorter than the seal width of the seal portions S in the lateral direction Y.
これらのピーク強度及び最小強度は、図5に示すようなグラフから読み取ることができる。
図5に示す例では、第1シール列SL1、第2シール列SL2及び第3シール列SL3にそれぞれ対応するピーク強度A,B,及びCが示されている。ピーク強度A及びB間の最小強度を、aとする。ピーク強度B及びC間の最小強度を、bとする。つまり、最小強度bは、最小強度aよりも横方向Y外側で測定された強度となる。 These peak and minimum intensities can be read from graphs such as those shown in FIG.
In the example shown in FIG. 5, peak intensities A, B, and C corresponding respectively to the first seal row SL1, the second seal row SL2, and the third seal row SL3 are shown. Let the minimum intensity between peak intensities A and B be a. Let the minimum intensity between peak intensities B and C be b. That is, the minimum intensity b is the intensity measured outside the minimum intensity a in the lateral direction Y.
図5に示す例では、第1シール列SL1、第2シール列SL2及び第3シール列SL3にそれぞれ対応するピーク強度A,B,及びCが示されている。ピーク強度A及びB間の最小強度を、aとする。ピーク強度B及びC間の最小強度を、bとする。つまり、最小強度bは、最小強度aよりも横方向Y外側で測定された強度となる。 These peak and minimum intensities can be read from graphs such as those shown in FIG.
In the example shown in FIG. 5, peak intensities A, B, and C corresponding respectively to the first seal row SL1, the second seal row SL2, and the third seal row SL3 are shown. Let the minimum intensity between peak intensities A and B be a. Let the minimum intensity between peak intensities B and C be b. That is, the minimum intensity b is the intensity measured outside the minimum intensity a in the lateral direction Y.
最小強度a,bが0Nよりも大きいことにより、最小強度a,bと、その次に現れるピーク強度B,Cとの差が急激に大きくなることが抑制される。つまり、最小強度a,bから、その次に現れるピーク強度B,Cまでの、単位長さ当たりのシール強度の増加率を抑制することができる。
本発明者らは、上記測定条件において得られたシール強度の分布が、サイド接合部8の実際の引き裂き時において得られるシール強度の分布に近似することを確認している。
したがって、上記構成によれば、サイド接合部8の実際の引き裂き時においても、廃棄者が経時的に受ける抗力の変動を小さくすることができ、引き裂きやすいサイド接合部8を得ることができる。 Since the minimum intensities a and b are larger than 0N, the difference between the minimum intensities a and b and the peak intensities B and C that appear next thereto is suppressed from increasing rapidly. That is, the rate of increase in seal strength per unit length from the minimum strengths a and b to the peak strengths B and C that appear next can be suppressed.
The inventors have confirmed that the seal strength distribution obtained under the above measurement conditions approximates the seal strength distribution obtained when the sidejoint portion 8 is actually torn.
Therefore, according to the above configuration, even when the sidejoint portion 8 is actually torn, it is possible to reduce the fluctuation of the drag force that the disposal person receives over time, and it is possible to obtain the side joint portion 8 that is easy to tear.
本発明者らは、上記測定条件において得られたシール強度の分布が、サイド接合部8の実際の引き裂き時において得られるシール強度の分布に近似することを確認している。
したがって、上記構成によれば、サイド接合部8の実際の引き裂き時においても、廃棄者が経時的に受ける抗力の変動を小さくすることができ、引き裂きやすいサイド接合部8を得ることができる。 Since the minimum intensities a and b are larger than 0N, the difference between the minimum intensities a and b and the peak intensities B and C that appear next thereto is suppressed from increasing rapidly. That is, the rate of increase in seal strength per unit length from the minimum strengths a and b to the peak strengths B and C that appear next can be suppressed.
The inventors have confirmed that the seal strength distribution obtained under the above measurement conditions approximates the seal strength distribution obtained when the side
Therefore, according to the above configuration, even when the side
さらに、ウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方に、複数のシール列SLとして3以上のシール列SLが配置されており、かつ、上述の測定サンプルを用いてシール強度を測定した場合に、3以上のピーク強度間の複数の最小強度は、横方向Y内側から外側に向かって測定される順に、増加することが好ましい。
Furthermore, three or more seal rows SL are arranged as a plurality of seal rows SL in at least one of the waist end region 8c or the leg end region 8d, and the seal strength was measured using the measurement sample described above. In some cases, the minimum intensities between the three or more peak intensities preferably increase in order measured from the inside to the outside in the transverse direction Y.
まず、3以上のシール列SLが配置された場合のピーク強度について説明する。
3以上のシール列SLが配置されている場合、これらのシール列SLのシール部Sのシール強度は、横方向Y内側から外側に向かって増加する。例えば、図5のグラフでは、ピーク強度A,B及びCがこの順で増加する。これにより、徐々に力を加えるように廃棄者を誘導でき、急に大きな力を加えることによる外装体5の横裂けを抑制できる。また、引き裂き開始時に大きな力が不要となることから、力の弱い廃棄者であっても、引き裂きやすく感じられる。したがって、廃棄時に横裂けしにくく、より引き裂きやすいサイド接合部8を得ることができる。 First, the peak intensity when three or more seal rows SL are arranged will be described.
When three or more seal rows SL are arranged, the seal strength of the seal portions S of these seal rows SL increases from the inner side to the outer side in the lateral direction Y. For example, in the graph of FIG. 5, peak intensities A, B and C increase in this order. As a result, the disposal person can be guided to gradually apply force, and lateral tearing of theouter package 5 due to sudden application of a large force can be suppressed. In addition, since a large force is not required at the start of tearing, even a disposer with weak force can easily tear. Therefore, it is possible to obtain the side joints 8 that are less likely to be laterally torn at the time of disposal and are easier to tear.
3以上のシール列SLが配置されている場合、これらのシール列SLのシール部Sのシール強度は、横方向Y内側から外側に向かって増加する。例えば、図5のグラフでは、ピーク強度A,B及びCがこの順で増加する。これにより、徐々に力を加えるように廃棄者を誘導でき、急に大きな力を加えることによる外装体5の横裂けを抑制できる。また、引き裂き開始時に大きな力が不要となることから、力の弱い廃棄者であっても、引き裂きやすく感じられる。したがって、廃棄時に横裂けしにくく、より引き裂きやすいサイド接合部8を得ることができる。 First, the peak intensity when three or more seal rows SL are arranged will be described.
When three or more seal rows SL are arranged, the seal strength of the seal portions S of these seal rows SL increases from the inner side to the outer side in the lateral direction Y. For example, in the graph of FIG. 5, peak intensities A, B and C increase in this order. As a result, the disposal person can be guided to gradually apply force, and lateral tearing of the
次に、3以上のシール列SLが配置された場合の最小強度について説明する。
図5に示す例では、ピーク強度A及びB間の最小強度aよりも、ピーク強度B及びC間の最小強度bの方が大きくなる。これにより、ピーク強度A,B及びCがこの順で増加した場合でも、最小強度a,bと、その次に現れるピーク強度B,Cとの差が急激に大きくなることが抑制される。この結果、最小強度a,bから、その次に現れるピーク強度B,Cまでの、単位長さ当たりのシール強度の増加率を、より効果的に抑制することができる。
したがって、上記構成によれば、サイド接合部8の実際の引き裂き時においても、廃棄者が経時的に受ける抗力の変動をより小さくすることができ、より一層引き裂きやすいサイド接合部8を得ることができる。 Next, the minimum strength when three or more seal rows SL are arranged will be described.
In the example shown in FIG. 5, the minimum intensity b between the peak intensities B and C is greater than the minimum intensity a between the peak intensities A and B. As a result, even when the peak intensities A, B, and C increase in this order, the difference between the minimum intensities a, b and the peak intensities B, C appearing next thereto is suppressed from increasing rapidly. As a result, the increase rate of the seal strength per unit length from the minimum strengths a and b to the peak strengths B and C appearing next can be suppressed more effectively.
Therefore, according to the above configuration, even when the sidejoint portion 8 is actually torn, it is possible to further reduce the fluctuation of the drag force that the disposal person receives over time, and it is possible to obtain the side joint portion 8 that is easier to tear. can.
図5に示す例では、ピーク強度A及びB間の最小強度aよりも、ピーク強度B及びC間の最小強度bの方が大きくなる。これにより、ピーク強度A,B及びCがこの順で増加した場合でも、最小強度a,bと、その次に現れるピーク強度B,Cとの差が急激に大きくなることが抑制される。この結果、最小強度a,bから、その次に現れるピーク強度B,Cまでの、単位長さ当たりのシール強度の増加率を、より効果的に抑制することができる。
したがって、上記構成によれば、サイド接合部8の実際の引き裂き時においても、廃棄者が経時的に受ける抗力の変動をより小さくすることができ、より一層引き裂きやすいサイド接合部8を得ることができる。 Next, the minimum strength when three or more seal rows SL are arranged will be described.
In the example shown in FIG. 5, the minimum intensity b between the peak intensities B and C is greater than the minimum intensity a between the peak intensities A and B. As a result, even when the peak intensities A, B, and C increase in this order, the difference between the minimum intensities a, b and the peak intensities B, C appearing next thereto is suppressed from increasing rapidly. As a result, the increase rate of the seal strength per unit length from the minimum strengths a and b to the peak strengths B and C appearing next can be suppressed more effectively.
Therefore, according to the above configuration, even when the side
上述の条件を満たすピーク強度及び最小強度を得やすくする観点から、シール部Sを以下のように配置することができる。
ピーク強度A,B,C間の最小強度a,bが0Nよりも大きいということは、測定用サンプルを横方向Y内側から外側に向かって剥離した際に、横方向Y内側のシール部Sが完全に剥がれる前に、その外側のシール部Sの剥離が開始されることを意味する。そこで、図7を参照し、外側シール列SLbのシール部Sと、それに隣り合う内側シール列SLaのシール部Sとの横方向Yにおける間隔D3に対する、内側シール列SLaのシール部Sの横方向Yにおける寸法の比率(D4/D3)は、好ましくは0.2以上、より好ましくは0.3以上である。
これにより、内側シール列SLaと外側シール列SLbとの間隔D3を狭め、内側シール列SLaのシール部Sが完全に剥がれる前に、外側シール列SLbのシール部Sの剥離が開始される構成とすることができる。したがって、最小強度a,bを0Nよりも大きくすることができる。 From the viewpoint of easily obtaining the peak strength and the minimum strength that satisfy the above conditions, the seal portion S can be arranged as follows.
The fact that the minimum intensities a and b between the peak intensities A, B, and C are greater than 0 N means that when the measurement sample is peeled from the inner side in the lateral direction Y toward the outer side, the seal portion S on the inner side in the lateral direction Y is It means that peeling of the outer seal portion S is started before it is completely peeled off. Therefore, referring to FIG. 7, the lateral direction of the seal portion S of the inner seal row SLa is relative to the distance D3 in the lateral direction Y between the seal portion S of the outer seal row SLb and the adjacent seal portion S of the inner seal row SLa. The dimensional ratio in Y (D4/D3) is preferably 0.2 or more, more preferably 0.3 or more.
As a result, the gap D3 between the inner seal row SLa and the outer seal row SLb is narrowed, and the peeling of the seal portion S of the outer seal row SLb is started before the seal portion S of the inner seal row SLa is completely peeled off. can do. Therefore, the minimum intensities a and b can be made greater than 0N.
ピーク強度A,B,C間の最小強度a,bが0Nよりも大きいということは、測定用サンプルを横方向Y内側から外側に向かって剥離した際に、横方向Y内側のシール部Sが完全に剥がれる前に、その外側のシール部Sの剥離が開始されることを意味する。そこで、図7を参照し、外側シール列SLbのシール部Sと、それに隣り合う内側シール列SLaのシール部Sとの横方向Yにおける間隔D3に対する、内側シール列SLaのシール部Sの横方向Yにおける寸法の比率(D4/D3)は、好ましくは0.2以上、より好ましくは0.3以上である。
これにより、内側シール列SLaと外側シール列SLbとの間隔D3を狭め、内側シール列SLaのシール部Sが完全に剥がれる前に、外側シール列SLbのシール部Sの剥離が開始される構成とすることができる。したがって、最小強度a,bを0Nよりも大きくすることができる。 From the viewpoint of easily obtaining the peak strength and the minimum strength that satisfy the above conditions, the seal portion S can be arranged as follows.
The fact that the minimum intensities a and b between the peak intensities A, B, and C are greater than 0 N means that when the measurement sample is peeled from the inner side in the lateral direction Y toward the outer side, the seal portion S on the inner side in the lateral direction Y is It means that peeling of the outer seal portion S is started before it is completely peeled off. Therefore, referring to FIG. 7, the lateral direction of the seal portion S of the inner seal row SLa is relative to the distance D3 in the lateral direction Y between the seal portion S of the outer seal row SLb and the adjacent seal portion S of the inner seal row SLa. The dimensional ratio in Y (D4/D3) is preferably 0.2 or more, more preferably 0.3 or more.
As a result, the gap D3 between the inner seal row SLa and the outer seal row SLb is narrowed, and the peeling of the seal portion S of the outer seal row SLb is started before the seal portion S of the inner seal row SLa is completely peeled off. can do. Therefore, the minimum intensities a and b can be made greater than 0N.
また、3以上のシール列SLが配置されたウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方において、横方向Yに隣り合うシール列SLのシール部S間の間隔は、横方向Y内側から外側に向かって減少するように構成されてもよい。これにより、横方向Y内側から外側に向かうに従い、ピーク強度間の幅を減少させることができ、最小強度を増加させやすくなる。
Further, in at least one of the waist end region 8c and the leg end region 8d where three or more seal lines SL are arranged, the interval between the seal portions S of the seal lines SL adjacent to each other in the lateral direction Y is may be configured to decrease outwardly from the As a result, the width between peak intensities can be decreased from the inner side to the outer side in the lateral direction Y, making it easier to increase the minimum intensity.
[シール部に関する寸法例]
シール列SLに属するシール部Sの寸法等としては、着用動作時及び着用時の剥がれ防止と引き裂き容易性とを両立させる観点から、以下の例が挙げられる。なお、以下の寸法は、弾性部材を伸長させていない自然状態において測定されるものとする。
シール部Sの横方向Yの寸法(最大寸法)は、好ましくは0.15mm以上、より好ましくは0.2mm以上であり、また好ましくは7mm以下、より好ましくは5mm以下である。
複数のシール列SLの横方向Yにおけるピッチは、好ましくは0.4mm以上、より好ましくは0.7mm以上であり、また好ましくは7mm以下、より好ましくは4mm以下である。
なお、複数のシール列SLの横方向Yにおけるピッチとは、横方向Yに隣り合うシール部Sにおいて、各シール部Sを横方向Yに2等分する線の間の横方向Yにおける距離を意味する。また、このピッチが一定でない場合には、5箇所の横方向Yにおけるピッチを測定し、その平均値を横方向Yにおけるピッチとする。
シール列SLに含まれるシール部Sの縦方向Xの寸法(最大寸法)は、好ましくは0.1m以上、より好ましくは0.3mm以上であり、また好ましくは2mm以下、より好ましくは0.6mm以下である。
シール列SLに含まれる複数のシール部Sの縦方向Xにおけるピッチは、好ましくは1.5mm以上、より好ましくは1.7mm以上であり、また好ましくは5.0mm以下、より好ましくは4mm以下である。
複数のシール部Sの縦方向Xにおけるピッチとは、縦方向Xに隣り合うシール部Sにおいて、各シール部Sを縦方向Xに2等分する線間の縦方向Xにおける距離を意味する。また、このピッチが一定でない場合には、5箇所の縦方向Xにおけるピッチを測定し、その平均値を縦方向Xにおけるピッチとする。 [Example of dimensions related to the seal part]
The dimensions of the seal portion S belonging to the seal line SL include the following examples from the viewpoint of achieving both the prevention of peeling during the wearing operation and wearing and the easiness of tearing. In addition, the following dimensions shall be measured in the natural state which is not extending|stretching an elastic member.
The dimension (maximum dimension) of the seal portion S in the lateral direction Y is preferably 0.15 mm or more, more preferably 0.2 mm or more, and is preferably 7 mm or less, more preferably 5 mm or less.
The pitch of the plurality of seal rows SL in the lateral direction Y is preferably 0.4 mm or more, more preferably 0.7 mm or more, and is preferably 7 mm or less, more preferably 4 mm or less.
In addition, the pitch in the horizontal direction Y of the plurality of seal rows SL is the distance in the horizontal direction Y between the lines that bisect each seal portion S in the horizontal direction Y in the seal portions S adjacent to each other in the horizontal direction Y. means. If the pitch is not constant, the pitches in the lateral direction Y are measured at five locations, and the average value thereof is taken as the lateral Y pitch.
The dimension (maximum dimension) in the longitudinal direction X of the seal portion S included in the seal row SL is preferably 0.1 m or more, more preferably 0.3 mm or more, and is preferably 2 mm or less, more preferably 0.6 mm. It is below.
The pitch in the longitudinal direction X of the plurality of seal portions S included in the seal row SL is preferably 1.5 mm or more, more preferably 1.7 mm or more, and is preferably 5.0 mm or less, more preferably 4 mm or less. be.
The pitch in the longitudinal direction X of the plurality of seal portions S means the distance in the longitudinal direction X between the lines dividing each seal portion S into two equal parts in the longitudinal direction X in the seal portions S adjacent to each other in the longitudinal direction X. If the pitch is not constant, the pitch in the vertical direction X is measured at five locations, and the average value thereof is taken as the pitch in the vertical direction X.
シール列SLに属するシール部Sの寸法等としては、着用動作時及び着用時の剥がれ防止と引き裂き容易性とを両立させる観点から、以下の例が挙げられる。なお、以下の寸法は、弾性部材を伸長させていない自然状態において測定されるものとする。
シール部Sの横方向Yの寸法(最大寸法)は、好ましくは0.15mm以上、より好ましくは0.2mm以上であり、また好ましくは7mm以下、より好ましくは5mm以下である。
複数のシール列SLの横方向Yにおけるピッチは、好ましくは0.4mm以上、より好ましくは0.7mm以上であり、また好ましくは7mm以下、より好ましくは4mm以下である。
なお、複数のシール列SLの横方向Yにおけるピッチとは、横方向Yに隣り合うシール部Sにおいて、各シール部Sを横方向Yに2等分する線の間の横方向Yにおける距離を意味する。また、このピッチが一定でない場合には、5箇所の横方向Yにおけるピッチを測定し、その平均値を横方向Yにおけるピッチとする。
シール列SLに含まれるシール部Sの縦方向Xの寸法(最大寸法)は、好ましくは0.1m以上、より好ましくは0.3mm以上であり、また好ましくは2mm以下、より好ましくは0.6mm以下である。
シール列SLに含まれる複数のシール部Sの縦方向Xにおけるピッチは、好ましくは1.5mm以上、より好ましくは1.7mm以上であり、また好ましくは5.0mm以下、より好ましくは4mm以下である。
複数のシール部Sの縦方向Xにおけるピッチとは、縦方向Xに隣り合うシール部Sにおいて、各シール部Sを縦方向Xに2等分する線間の縦方向Xにおける距離を意味する。また、このピッチが一定でない場合には、5箇所の縦方向Xにおけるピッチを測定し、その平均値を縦方向Xにおけるピッチとする。 [Example of dimensions related to the seal part]
The dimensions of the seal portion S belonging to the seal line SL include the following examples from the viewpoint of achieving both the prevention of peeling during the wearing operation and wearing and the easiness of tearing. In addition, the following dimensions shall be measured in the natural state which is not extending|stretching an elastic member.
The dimension (maximum dimension) of the seal portion S in the lateral direction Y is preferably 0.15 mm or more, more preferably 0.2 mm or more, and is preferably 7 mm or less, more preferably 5 mm or less.
The pitch of the plurality of seal rows SL in the lateral direction Y is preferably 0.4 mm or more, more preferably 0.7 mm or more, and is preferably 7 mm or less, more preferably 4 mm or less.
In addition, the pitch in the horizontal direction Y of the plurality of seal rows SL is the distance in the horizontal direction Y between the lines that bisect each seal portion S in the horizontal direction Y in the seal portions S adjacent to each other in the horizontal direction Y. means. If the pitch is not constant, the pitches in the lateral direction Y are measured at five locations, and the average value thereof is taken as the lateral Y pitch.
The dimension (maximum dimension) in the longitudinal direction X of the seal portion S included in the seal row SL is preferably 0.1 m or more, more preferably 0.3 mm or more, and is preferably 2 mm or less, more preferably 0.6 mm. It is below.
The pitch in the longitudinal direction X of the plurality of seal portions S included in the seal row SL is preferably 1.5 mm or more, more preferably 1.7 mm or more, and is preferably 5.0 mm or less, more preferably 4 mm or less. be.
The pitch in the longitudinal direction X of the plurality of seal portions S means the distance in the longitudinal direction X between the lines dividing each seal portion S into two equal parts in the longitudinal direction X in the seal portions S adjacent to each other in the longitudinal direction X. If the pitch is not constant, the pitch in the vertical direction X is measured at five locations, and the average value thereof is taken as the pitch in the vertical direction X.
[弾性部材の構成例]
図2に示すように、外装体5の腹側領域5a及び背側領域5bは、横方向Yに延びる複数の弾性部材10を含む。
複数の弾性部材10は、外装体5の複数の熱可塑性シート50間に配置される(図9参照)。
これらの弾性部材10により、おむつ1の胴周りに伸縮性が発揮され、着用動作が容易になるとともに、着用時のフィット性が維持される。
なお、「弾性部材10が横方向Yに延びる」とは、展開伸長状態において弾性部材10が横方向Yに延びることを意味する。但し、上記表現は、弾性部材10が展開伸長状態において横方向Yに平行な態様に限定されず、全体として横方向Yに延びる態様を含むものとする。
さらに、図2に示すように、外装体5は、上記弾性部材10の他、レッグ開口部1Lの周囲に配置されたレッグ用弾性部材11を含んでいてもよい。 [Configuration example of elastic member]
As shown in FIG. 2, theventral region 5a and the dorsal region 5b of the armor 5 include a plurality of elastic members 10 extending in the horizontal direction Y. As shown in FIG.
The plurality ofelastic members 10 are arranged between the plurality of thermoplastic sheets 50 of the exterior body 5 (see FIG. 9).
Theseelastic members 10 exhibit stretchability around the waist of the diaper 1, facilitate the wearing operation, and maintain the fit when worn.
In addition, "theelastic member 10 extends in the lateral direction Y" means that the elastic member 10 extends in the lateral direction Y in the deployed and extended state. However, the above expression is not limited to a mode in which the elastic member 10 is parallel to the lateral direction Y in the deployed and stretched state, and includes a mode in which the elastic member 10 extends in the lateral direction Y as a whole.
Furthermore, as shown in FIG. 2, theouter body 5 may include leg elastic members 11 arranged around the leg openings 1L in addition to the elastic members 10 described above.
図2に示すように、外装体5の腹側領域5a及び背側領域5bは、横方向Yに延びる複数の弾性部材10を含む。
複数の弾性部材10は、外装体5の複数の熱可塑性シート50間に配置される(図9参照)。
これらの弾性部材10により、おむつ1の胴周りに伸縮性が発揮され、着用動作が容易になるとともに、着用時のフィット性が維持される。
なお、「弾性部材10が横方向Yに延びる」とは、展開伸長状態において弾性部材10が横方向Yに延びることを意味する。但し、上記表現は、弾性部材10が展開伸長状態において横方向Yに平行な態様に限定されず、全体として横方向Yに延びる態様を含むものとする。
さらに、図2に示すように、外装体5は、上記弾性部材10の他、レッグ開口部1Lの周囲に配置されたレッグ用弾性部材11を含んでいてもよい。 [Configuration example of elastic member]
As shown in FIG. 2, the
The plurality of
These
In addition, "the
Furthermore, as shown in FIG. 2, the
弾性部材10,11は、断面が矩形、正方形、円形、多角形状等の糸状(糸ゴム等)若しくは紐状(平ゴム等)のもの、又はマルチフィラメントタイプの糸状のもの等を好ましく用いることができる。弾性部材10,11の材料は、使い捨ておむつ等の吸収性物品に従来用いられるもの等を特に制限なく用いることができ、例えば、スチレン-ブタジエン、ブタジエン、イソプレン、ネオプレン等の合成ゴム、天然ゴム、EVA、伸縮性ポリオレフィン、ポリウレタン等を挙げることができる。
The elastic members 10 and 11 preferably have a rectangular, square, circular, polygonal cross section, and are thread-like (string rubber, etc.) or string-like (flat rubber, etc.), or multi-filament type thread-like ones. can. The materials of the elastic members 10 and 11 can be those conventionally used in absorbent articles such as disposable diapers without particular limitation. EVA, elastic polyolefin, polyurethane and the like can be mentioned.
腹側領域5a及び背側領域5b各々の弾性部材10の横方向Y外側の端部は、胴周り全体の伸縮性を確保する観点から、サイド接合部8又はその近傍に位置していることが好ましい。具体的に、当該端部は、サイド接合部8との横方向Yにおける距離が10mm以下であることが好ましく、当該距離が0mmであって当該端部がサイド接合部8内に位置していることがより好ましい。
弾性部材10は、引き裂き時に力が加えられる領域又はその近傍まで配置されることが一般的であり、廃棄時の引き裂き容易性に影響を与えやすい。
そこで、廃棄時の引き裂き容易性を向上させるとともに、着用者の姿勢によって腹囲が変動しやすいウエスト周りに沿いやすくする観点から、ウエスト端部領域8cを含む領域と含まない領域とで、弾性部材の伸張率を以下のように調整することが好ましい。 From the viewpoint of ensuring the stretchability of the entire waist circumference, the lateral Y outer end of theelastic member 10 of each of the ventral region 5a and the dorsal region 5b is preferably positioned at or near the side joint 8. preferable. Specifically, the end preferably has a distance of 10 mm or less from the side joint 8 in the lateral direction Y, and the distance is 0 mm and the end is positioned inside the side joint 8. is more preferable.
Theelastic member 10 is generally arranged up to or near a region where force is applied during tearing, which tends to affect the ease of tearing during disposal.
Therefore, from the viewpoint of improving the ease of tearing at the time of disposal and making it easier to follow the waist circumference where the waist circumference tends to change depending on the wearer's posture, the elastic member is formed in a region including and not including thewaist end region 8c. It is preferable to adjust the elongation rate as follows.
弾性部材10は、引き裂き時に力が加えられる領域又はその近傍まで配置されることが一般的であり、廃棄時の引き裂き容易性に影響を与えやすい。
そこで、廃棄時の引き裂き容易性を向上させるとともに、着用者の姿勢によって腹囲が変動しやすいウエスト周りに沿いやすくする観点から、ウエスト端部領域8cを含む領域と含まない領域とで、弾性部材の伸張率を以下のように調整することが好ましい。 From the viewpoint of ensuring the stretchability of the entire waist circumference, the lateral Y outer end of the
The
Therefore, from the viewpoint of improving the ease of tearing at the time of disposal and making it easier to follow the waist circumference where the waist circumference tends to change depending on the wearer's posture, the elastic member is formed in a region including and not including the
図2に示すように、腹側領域5a及び背側領域5bは、それぞれ、横方向Yに延びる複数の弾性部材10が配置された第1伸縮領域5f及び第2伸縮領域5gを有する。第1伸縮領域5f及び第2伸縮領域5gは、それぞれ、一対のサイド接合部8の一方から他方まで横方向Yに延びる。つまり、第1伸縮領域5f及び第2伸縮領域5gは、腹側領域5a及び背側領域5bの横方向Yにおける全幅にわたって延びる。
第1伸縮領域5fは、ウエスト端部領域8cから横方向Yに延びる。つまり、第1伸縮領域5fの横方向Y両端部は、ウエスト端部領域8cで構成される。
第2伸縮領域5gは、第1伸縮領域5fと縦方向Xに隣接し、サイド接合部8のウエスト端部領域8cを除く領域から横方向Yに延びる。 As shown in FIG. 2, theventral region 5a and the dorsal region 5b respectively have a first stretchable region 5f and a second stretchable region 5g in which a plurality of elastic members 10 extending in the lateral direction Y are arranged. The first stretchable region 5f and the second stretchable region 5g each extend in the horizontal direction Y from one of the pair of side joints 8 to the other. That is, the first stretchable region 5f and the second stretchable region 5g extend over the entire width in the horizontal direction Y of the ventral region 5a and the dorsal region 5b.
The firstelastic region 5f extends in the lateral direction Y from the waist end region 8c. That is, both lateral Y ends of the first stretchable region 5f are constituted by the waist end regions 8c.
The secondstretchable region 5g is adjacent to the first stretchable region 5f in the longitudinal direction X and extends in the lateral direction Y from the region of the side joint 8 excluding the waist end region 8c.
第1伸縮領域5fは、ウエスト端部領域8cから横方向Yに延びる。つまり、第1伸縮領域5fの横方向Y両端部は、ウエスト端部領域8cで構成される。
第2伸縮領域5gは、第1伸縮領域5fと縦方向Xに隣接し、サイド接合部8のウエスト端部領域8cを除く領域から横方向Yに延びる。 As shown in FIG. 2, the
The first
The second
この構成において、第1伸縮領域5fにおける複数の弾性部材10の平均伸張率は、第2伸縮領域5gにおける複数の弾性部材10の平均伸張率よりも低いことが好ましい。
弾性部材10の伸張率は、パンツ型吸収性物品から取り出された自然長における弾性部材の長さに対する、パンツ型吸収性物品の展開伸長状態において伸長された弾性部材の長さの割合を意味する。
つまり、この伸張率が低いほど、弾性部材10を引っ張った際の弾性力がより小さくなる傾向となる。
なお、弾性部材10の伸張率は、製造時において、外装体5に配置される弾性部材10の伸張の度合いを調整することで、調整することができる。製造時には、例えば、弾性部材10を所定の長さまで伸張させ、コーム等によって弾性部材10に接着剤を塗布し、外装体5の熱可塑性シート50に弾性部材10を固定する。 In this configuration, the average stretch rate of the plurality ofelastic members 10 in the first stretchable region 5f is preferably lower than the average stretch rate of the plurality of elastic members 10 in the second stretchable region 5g.
The stretch ratio of theelastic member 10 means the ratio of the length of the elastic member stretched in the unfolded and stretched state of the pants-type absorbent article to the length of the elastic member in the natural length taken out from the pants-type absorbent article. .
That is, the lower the elongation rate, the smaller the elastic force when theelastic member 10 is pulled.
The extension rate of theelastic member 10 can be adjusted by adjusting the degree of extension of the elastic member 10 arranged on the exterior body 5 at the time of manufacturing. During manufacturing, for example, the elastic member 10 is stretched to a predetermined length, an adhesive is applied to the elastic member 10 with a comb or the like, and the elastic member 10 is fixed to the thermoplastic sheet 50 of the exterior body 5 .
弾性部材10の伸張率は、パンツ型吸収性物品から取り出された自然長における弾性部材の長さに対する、パンツ型吸収性物品の展開伸長状態において伸長された弾性部材の長さの割合を意味する。
つまり、この伸張率が低いほど、弾性部材10を引っ張った際の弾性力がより小さくなる傾向となる。
なお、弾性部材10の伸張率は、製造時において、外装体5に配置される弾性部材10の伸張の度合いを調整することで、調整することができる。製造時には、例えば、弾性部材10を所定の長さまで伸張させ、コーム等によって弾性部材10に接着剤を塗布し、外装体5の熱可塑性シート50に弾性部材10を固定する。 In this configuration, the average stretch rate of the plurality of
The stretch ratio of the
That is, the lower the elongation rate, the smaller the elastic force when the
The extension rate of the
ウエスト端部領域8cには、上述のように、引き裂き動作時に横方向Yの力が直接加えられ得る。上記構成では、第1伸縮領域5fの弾性部材10の平均伸張率が低いことで、引き裂き力に対する抗力となる弾性部材10の弾性力が低くなる。これにより、引き裂き力に係るエネルギが弾性部材10の伸長によって消費されにくくなり、より弱い力でも効率よく引き裂くことができる。したがって、上記構成により、安定した引き裂き動作が可能となり、引き裂き力が強すぎることによる外装体5の破れ等の不具合を防止することができる。
A force in the lateral direction Y can be directly applied to the waist end region 8c during the tearing operation, as described above. In the above configuration, since the average elongation rate of the elastic member 10 in the first elastic region 5f is low, the elastic force of the elastic member 10, which acts as a resistance against the tearing force, is low. As a result, the energy associated with the tearing force is less likely to be consumed by the elongation of the elastic member 10, and even a weaker force can efficiently tear. Therefore, with the above configuration, a stable tearing operation becomes possible, and troubles such as tearing of the exterior body 5 due to excessive tearing force can be prevented.
<弾性部材の平均伸張率の測定方法>
パンツ型吸収性物品のサイド接合部8を分離して吸収性本体4を外し、外装体5の腹側領域5a及び背側領域5bを切り出す。さらに、腹側領域5a及び背側領域5bのウエスト端部8a(ウエスト開口端Wa)及び/又はレッグ端部8bから縦方向Xに25mmの位置を横方向Yに平行に切断し、第1伸縮領域5f及び第2伸縮領域5gを切り出す。
そして、パンツ型吸収性物品の展開伸長状態における、切り出した各領域の弾性部材10の長さを測定する。この測定値から、各領域5f,5gにおける全ての弾性部材10の最大伸張状態の長さの平均値を算出する。
各領域5f,5gに接着剤等によって固定された全ての弾性部材10を、酢酸エチル等の適当な溶剤を用いて外装体5の他の構成部材から取り外し、各領域5f,5gにおける自然長の弾性部材10の長さを測定する。この測定値から、各領域5f,5gにおける自然長の全ての弾性部材10の長さの平均値を算出する。
そして、各領域5f,5gにおいて、自然長における弾性部材10の長さの平均値に対する、展開伸長状態における弾性部材10の長さの平均値の割合を算出し、これを各領域5f,5gの弾性部材10の平均伸張率とする。 <Method for measuring average elongation of elastic member>
The side joints 8 of the pants-type absorbent article are separated, the absorbentmain body 4 is removed, and the ventral region 5a and the dorsal region 5b of the exterior body 5 are cut out. Furthermore, a position of 25 mm in the longitudinal direction X from the waist end 8a (waist opening end Wa) and/or the leg end 8b of the abdominal region 5a and the dorsal region 5b is cut parallel to the lateral direction Y, and the first stretching A region 5f and a second elastic region 5g are cut out.
Then, the length of theelastic member 10 in each cut-out region is measured in the unfolded and stretched state of the pants-type absorbent article. From this measured value, the average value of the lengths of all the elastic members 10 in the maximum stretched state in each of the regions 5f and 5g is calculated.
All theelastic members 10 fixed to the regions 5f and 5g by adhesive or the like are removed from the other constituent members of the exterior body 5 using a suitable solvent such as ethyl acetate, and the natural lengths of the regions 5f and 5g are removed. The length of elastic member 10 is measured. From this measured value, the average value of the lengths of all the natural lengths of the elastic members 10 in each of the regions 5f and 5g is calculated.
Then, in each of the regions 5f and 5g, the ratio of the average length of the elastic member 10 in the unfolded and stretched state to the average length of the elastic member 10 in the natural length is calculated. Let it be the average elongation rate of the elastic member 10 .
パンツ型吸収性物品のサイド接合部8を分離して吸収性本体4を外し、外装体5の腹側領域5a及び背側領域5bを切り出す。さらに、腹側領域5a及び背側領域5bのウエスト端部8a(ウエスト開口端Wa)及び/又はレッグ端部8bから縦方向Xに25mmの位置を横方向Yに平行に切断し、第1伸縮領域5f及び第2伸縮領域5gを切り出す。
そして、パンツ型吸収性物品の展開伸長状態における、切り出した各領域の弾性部材10の長さを測定する。この測定値から、各領域5f,5gにおける全ての弾性部材10の最大伸張状態の長さの平均値を算出する。
各領域5f,5gに接着剤等によって固定された全ての弾性部材10を、酢酸エチル等の適当な溶剤を用いて外装体5の他の構成部材から取り外し、各領域5f,5gにおける自然長の弾性部材10の長さを測定する。この測定値から、各領域5f,5gにおける自然長の全ての弾性部材10の長さの平均値を算出する。
そして、各領域5f,5gにおいて、自然長における弾性部材10の長さの平均値に対する、展開伸長状態における弾性部材10の長さの平均値の割合を算出し、これを各領域5f,5gの弾性部材10の平均伸張率とする。 <Method for measuring average elongation of elastic member>
The side joints 8 of the pants-type absorbent article are separated, the absorbent
Then, the length of the
All the
Then, in each of the
第1伸縮領域5fにおける複数の弾性部材10の平均伸張率は、好ましくは120%以上、より好ましくは130%以上であり、好ましくは500%以下、より好ましくは450%以下である。
第2伸縮領域5gにおける複数の弾性部材10の平均伸張率は、好ましくは150%以上、より好ましくは180%以上であり、好ましくは550%以下、より好ましくは500%以下である。
第2伸縮領域5gにおける複数の弾性部材10の平均伸張率に対する、第1伸縮領域5fにおける複数の弾性部材10の平均伸張率の割合は、上記作用効果を効果的に得る観点から、好ましくは20%以上、より好ましくは30%以上であり、好ましくは90%以下、より好ましくは80%以下である。 The average stretch rate of the plurality ofelastic members 10 in the first elastic region 5f is preferably 120% or more, more preferably 130% or more, and preferably 500% or less, more preferably 450% or less.
The average stretch rate of the plurality ofelastic members 10 in the second elastic region 5g is preferably 150% or more, more preferably 180% or more, and preferably 550% or less, more preferably 500% or less.
The ratio of the average elongation rate of the plurality ofelastic members 10 in the first elastic region 5f to the average elongation rate of the plurality of elastic members 10 in the second elastic region 5g is preferably 20 from the viewpoint of effectively obtaining the above effects. % or more, more preferably 30% or more, preferably 90% or less, more preferably 80% or less.
第2伸縮領域5gにおける複数の弾性部材10の平均伸張率は、好ましくは150%以上、より好ましくは180%以上であり、好ましくは550%以下、より好ましくは500%以下である。
第2伸縮領域5gにおける複数の弾性部材10の平均伸張率に対する、第1伸縮領域5fにおける複数の弾性部材10の平均伸張率の割合は、上記作用効果を効果的に得る観点から、好ましくは20%以上、より好ましくは30%以上であり、好ましくは90%以下、より好ましくは80%以下である。 The average stretch rate of the plurality of
The average stretch rate of the plurality of
The ratio of the average elongation rate of the plurality of
また、弾性部材10が横方向Yにサイド接合部8まで延びる場合、平面視において弾性部材10とシール部Sとが重なる位置では、シール部Sの強度が低下しやすい。特に、弾性部材10がホットメルト接着剤を介して外装体5に配置される場合には、ホットメルト接着剤がシール部Sの融着を阻害し、シール部Sの強度がより一層低下しやすくなる。
弾性部材10とシール部Sとの平面視における重なりを抑制する観点から、図8に示すように、サイド接合部8における複数の弾性部材10の縦方向XにおけるピッチD5は、複数のシール部Sの縦方向XにおけるピッチD4よりも大きく、かつ、複数のシール部Sの縦方向XにおけるピッチD4の整数倍ではないことが好ましい。
なお、複数の弾性部材10の縦方向XにおけるピッチD5とは、縦方向Xに隣り合う弾性部材10において、各弾性部材10を縦方向Xに2等分する線間の縦方向Xにおける距離を意味する。 Further, when theelastic member 10 extends to the side joint portion 8 in the lateral direction Y, the strength of the seal portion S is likely to be lowered at the position where the elastic member 10 and the seal portion S overlap each other in plan view. In particular, when the elastic member 10 is arranged on the exterior body 5 via a hot-melt adhesive, the hot-melt adhesive hinders the fusion of the seal portion S, and the strength of the seal portion S is likely to be further reduced. Become.
From the viewpoint of suppressing the overlapping of theelastic members 10 and the seal portions S in plan view, as shown in FIG. and not an integral multiple of the pitch D4 in the longitudinal direction X of the plurality of seal portions S.
Note that the pitch D5 of the plurality ofelastic members 10 in the vertical direction X is the distance in the vertical direction X between the lines dividing each elastic member 10 into two equal parts in the vertical direction X in the elastic members 10 adjacent to each other in the vertical direction X. means.
弾性部材10とシール部Sとの平面視における重なりを抑制する観点から、図8に示すように、サイド接合部8における複数の弾性部材10の縦方向XにおけるピッチD5は、複数のシール部Sの縦方向XにおけるピッチD4よりも大きく、かつ、複数のシール部Sの縦方向XにおけるピッチD4の整数倍ではないことが好ましい。
なお、複数の弾性部材10の縦方向XにおけるピッチD5とは、縦方向Xに隣り合う弾性部材10において、各弾性部材10を縦方向Xに2等分する線間の縦方向Xにおける距離を意味する。 Further, when the
From the viewpoint of suppressing the overlapping of the
Note that the pitch D5 of the plurality of
これにより、弾性部材10とシール部Sの縦方向Xにおけるピッチが一致せず、これらの平面視における重なりを抑制できる。さらに、弾性部材10の縦方向XにおけるピッチD5がシール部Sの縦方向XにおけるピッチD4よりも大きいことで、シール部Sのピッチを狭くしてシール部Sを縦方向Xに密に配置することができ、サイド接合部8の剥がれを抑制することができる。加えて、弾性部材10の縦方向Xにおけるピッチがシール部Sの縦方向Xにおけるピッチの整数倍でないことで、これらの平面視における重なりを抑制でき、弾性部材10に起因するシール部Sの強度の低下を抑制することができる。したがって、シール部Sの強度を精度よく調整することができる。
As a result, the pitches of the elastic member 10 and the seal portion S in the longitudinal direction X do not match, and it is possible to suppress their overlap in plan view. Furthermore, since the pitch D5 of the elastic member 10 in the longitudinal direction X is larger than the pitch D4 of the seal portions S in the longitudinal direction X, the pitch of the seal portions S is narrowed and the seal portions S are densely arranged in the longitudinal direction X. , and peeling of the side joint portion 8 can be suppressed. In addition, since the pitch of the elastic member 10 in the longitudinal direction X is not an integral multiple of the pitch of the seal portion S in the longitudinal direction X, it is possible to suppress the overlap in plan view, and the strength of the seal portion S caused by the elastic member 10. can be suppressed. Therefore, the strength of the seal portion S can be adjusted with high accuracy.
[外装体の構成例]
図9に示すように、外装体5は、複数の熱可塑性シート50として、例えば、外層シート51と、内層シート52と、を含むことが好ましい。外層シート51は、内層シート52よりも非肌側に配置され、外装体5の非肌対向面を形成する。内層シート52と外層シート51との間には、例えば、弾性部材10が配置されている。
本実施形態において、外装体5の少なくとも一部がウエスト開口端Waから肌側に折り返されることにより、外装体5が折り返し構造を有している。図9に示す例では、外層シート51のみがウエスト端部8aから肌側に折り返されている。
なお、図9の断面図では、説明のため、サイド接合部8の腹側領域5aと背側領域5bとを分離した状態で示している。 [Configuration example of exterior body]
As shown in FIG. 9 , theexterior body 5 preferably includes, for example, an outer layer sheet 51 and an inner layer sheet 52 as a plurality of thermoplastic sheets 50 . The outer layer sheet 51 is arranged on the non-skin side of the inner layer sheet 52 and forms the non-skin facing surface of the exterior body 5 . For example, an elastic member 10 is arranged between the inner layer sheet 52 and the outer layer sheet 51 .
In the present embodiment, at least part of theexterior body 5 is folded back from the waist opening end Wa toward the skin side, so that the exterior body 5 has a folded structure. In the example shown in FIG. 9, only the outer layer sheet 51 is folded back from the waist end 8a to the skin side.
In addition, in the cross-sectional view of FIG. 9, for the sake of explanation, theventral region 5a and the dorsal region 5b of the side joint portion 8 are shown in a separated state.
図9に示すように、外装体5は、複数の熱可塑性シート50として、例えば、外層シート51と、内層シート52と、を含むことが好ましい。外層シート51は、内層シート52よりも非肌側に配置され、外装体5の非肌対向面を形成する。内層シート52と外層シート51との間には、例えば、弾性部材10が配置されている。
本実施形態において、外装体5の少なくとも一部がウエスト開口端Waから肌側に折り返されることにより、外装体5が折り返し構造を有している。図9に示す例では、外層シート51のみがウエスト端部8aから肌側に折り返されている。
なお、図9の断面図では、説明のため、サイド接合部8の腹側領域5aと背側領域5bとを分離した状態で示している。 [Configuration example of exterior body]
As shown in FIG. 9 , the
In the present embodiment, at least part of the
In addition, in the cross-sectional view of FIG. 9, for the sake of explanation, the
本実施形態では、図9に示すように、外装体5の折り返し構造に起因して、サイド接合部8が、熱可塑性シート50の積層数の異なる複数の領域を有している。
つまり、本実施形態において、サイド接合部8は、6以上の熱可塑性シート50が積層された第1積層部T1と、第1積層部T1よりも少ない数の熱可塑性シート50が積層された第2積層部T2と、を有する。本実施形態において、第1積層部T1は、外装体5が折り返された領域に相当し、ウエスト端部領域8cは、第1積層部T1に配置される。第1積層部T1は、熱可塑性シート50として、肌対向面を構成する第1肌側シートP1を含む。第2積層部T2は、熱可塑性シート50として、肌対向面を構成する第2肌側シートP2を含む。 In this embodiment, as shown in FIG. 9 , the sidejoint portion 8 has a plurality of regions in which the thermoplastic sheets 50 are laminated in different numbers due to the folded structure of the exterior body 5 .
That is, in the present embodiment, the sidejoint portion 8 includes a first laminated portion T1 in which six or more thermoplastic sheets 50 are laminated, and a second laminated portion T1 in which a smaller number of thermoplastic sheets 50 than the first laminated portion T1 are laminated. 2 laminated portion T2. In the present embodiment, the first laminated portion T1 corresponds to a region where the exterior body 5 is folded back, and the waist end region 8c is arranged in the first laminated portion T1. The first laminated portion T1 includes, as the thermoplastic sheet 50, a first skin-side sheet P1 forming a skin-facing surface. The second laminated portion T2 includes, as the thermoplastic sheet 50, a second skin-side sheet P2 that constitutes the skin-facing surface.
つまり、本実施形態において、サイド接合部8は、6以上の熱可塑性シート50が積層された第1積層部T1と、第1積層部T1よりも少ない数の熱可塑性シート50が積層された第2積層部T2と、を有する。本実施形態において、第1積層部T1は、外装体5が折り返された領域に相当し、ウエスト端部領域8cは、第1積層部T1に配置される。第1積層部T1は、熱可塑性シート50として、肌対向面を構成する第1肌側シートP1を含む。第2積層部T2は、熱可塑性シート50として、肌対向面を構成する第2肌側シートP2を含む。 In this embodiment, as shown in FIG. 9 , the side
That is, in the present embodiment, the side
図9に示す例では、腹側領域5aの第1積層部T1は、折り返されていない外層シート51と、折り返されていない内層シート52と、折り返された外層シート51と、の3層で構成される。背側領域5bの第1積層部T1も、同様の3層で構成される。これにより、第1積層部T1は、合計6層で構成される。第1積層部T1において、第1肌側シートP1は、折り返された外層シート51で構成される。
図9に示す例では、腹側領域5aの第2積層部T2は、折り返されていない外層シート51と、折り返されていない内層シート52と、の2層で構成される。背側領域5bの第2積層部T2も、同様の2層で構成される。これにより、第2積層部T2は、合計4層で構成される。第2積層部T2において、第2肌側シートP2は、折り返されていない内層シート52で構成される。 In the example shown in FIG. 9, the first laminated portion T1 of theventral region 5a is composed of three layers: an outer layer sheet 51 that is not folded back, an inner layer sheet 52 that is not folded back, and an outer layer sheet 51 that is folded back. be done. The first laminated portion T1 of the dorsal region 5b is also composed of the same three layers. Thus, the first laminated section T1 is composed of a total of six layers. In the first laminated portion T1, the first skin side sheet P1 is composed of the outer layer sheet 51 folded back.
In the example shown in FIG. 9, the second laminated portion T2 of theventral region 5a is composed of two layers, an outer layer sheet 51 that is not folded back and an inner layer sheet 52 that is not folded back. The second laminated portion T2 of the dorsal region 5b is also composed of two similar layers. As a result, the second lamination part T2 is composed of a total of four layers. In the second laminated portion T2, the second skin side sheet P2 is composed of the inner layer sheet 52 that is not folded back.
図9に示す例では、腹側領域5aの第2積層部T2は、折り返されていない外層シート51と、折り返されていない内層シート52と、の2層で構成される。背側領域5bの第2積層部T2も、同様の2層で構成される。これにより、第2積層部T2は、合計4層で構成される。第2積層部T2において、第2肌側シートP2は、折り返されていない内層シート52で構成される。 In the example shown in FIG. 9, the first laminated portion T1 of the
In the example shown in FIG. 9, the second laminated portion T2 of the
第1積層部T1は、第2積層部T2よりも熱可塑性シート50の積層数が多いため、熱可塑性樹脂の量も多くなる。このため、第1積層部T1は、第2積層部T2よりも熱融着する樹脂の量が多くなり、シール部Sのシール強度が高くなりやすい。
したがって、第1積層部T1と第2積層部T2のシール部Sのパターンを調整することで、第1積層部T1と第2積層部T2における接合強度を調整し、引き裂き安定性の向上を図ることができる。 Since the number of laminatedthermoplastic sheets 50 is larger in the first laminated portion T1 than in the second laminated portion T2, the amount of thermoplastic resin is also increased. Therefore, the first laminated portion T1 has a larger amount of heat-sealed resin than the second laminated portion T2, and the sealing strength of the seal portion S tends to be high.
Therefore, by adjusting the pattern of the seal portion S of the first laminated portion T1 and the second laminated portion T2, the bonding strength between the first laminated portion T1 and the second laminated portion T2 is adjusted, and the tearing stability is improved. be able to.
したがって、第1積層部T1と第2積層部T2のシール部Sのパターンを調整することで、第1積層部T1と第2積層部T2における接合強度を調整し、引き裂き安定性の向上を図ることができる。 Since the number of laminated
Therefore, by adjusting the pattern of the seal portion S of the first laminated portion T1 and the second laminated portion T2, the bonding strength between the first laminated portion T1 and the second laminated portion T2 is adjusted, and the tearing stability is improved. be able to.
[第1積層部及び第2積層部におけるシール部の平面形状及び/又は配置の例]
サイド接合部8が第1積層部T1と第2積層部T2とを有する場合、さらにサイド接合部8は、横方向Yにおいてサイド接合部8の全幅にわたって延び、かつ、縦方向Xに隣接した第1シール領域R1及び第2シール領域R2を有することが好ましい。
図10(A),(B)及び図11(A),(B)に例示するように、第1シール領域R1及び第2シール領域R2は、規則的な平面形状及び配置を有する複数のシール部Sをそれぞれ含む。第1シール領域R1及び第2シール領域R2では、複数のシール部Sの平面形状又は配置の少なくとも一方が異なる。
「複数のシール部Sが規則的な平面形状を有する」とは、領域内の全てのシール部Sが実質的に同一の平面形状を有すること、又は、複数のシール部Sが複数種の平面形状を有し、異なる平面形状のシール部Sが規則的に配置されていること、の少なくとも一方を意味する。
「複数のシール部Sが規則的な配置を有する」とは、縦方向X及び横方向Yにおけるシール部Sのピッチが実質的に同一であること、又は、規則的に変化するものであること、の少なくとも一方を意味する。 [Example of Planar Shape and/or Arrangement of Seal Portions in First Laminated Part and Second Laminated Part]
When the sidejoint portion 8 has the first laminated portion T1 and the second laminated portion T2, the side joint portion 8 extends across the entire width of the side joint portion 8 in the horizontal direction Y and is adjacent to the side joint portion 8 in the longitudinal direction X. It is preferable to have one sealing area R1 and a second sealing area R2.
As exemplified in FIGS. 10(A), (B) and FIGS. 11(A), (B), the first sealing region R1 and the second sealing region R2 are a plurality of seals having a regular planar shape and arrangement. Part S, respectively. At least one of the planar shape and arrangement of the plurality of seal portions S is different between the first seal region R1 and the second seal region R2.
“The plurality of seal portions S have a regular planar shape” means that all the seal portions S within the region have substantially the same planar shape, or that the plurality of seal portions S have a plurality of types of planar shapes. It means at least one of having a shape and having seal portions S of different planar shapes arranged regularly.
“A plurality of seal portions S are regularly arranged” means that the pitch of the seal portions S in the longitudinal direction X and the lateral direction Y is substantially the same, or that the pitch changes regularly. means at least one of
サイド接合部8が第1積層部T1と第2積層部T2とを有する場合、さらにサイド接合部8は、横方向Yにおいてサイド接合部8の全幅にわたって延び、かつ、縦方向Xに隣接した第1シール領域R1及び第2シール領域R2を有することが好ましい。
図10(A),(B)及び図11(A),(B)に例示するように、第1シール領域R1及び第2シール領域R2は、規則的な平面形状及び配置を有する複数のシール部Sをそれぞれ含む。第1シール領域R1及び第2シール領域R2では、複数のシール部Sの平面形状又は配置の少なくとも一方が異なる。
「複数のシール部Sが規則的な平面形状を有する」とは、領域内の全てのシール部Sが実質的に同一の平面形状を有すること、又は、複数のシール部Sが複数種の平面形状を有し、異なる平面形状のシール部Sが規則的に配置されていること、の少なくとも一方を意味する。
「複数のシール部Sが規則的な配置を有する」とは、縦方向X及び横方向Yにおけるシール部Sのピッチが実質的に同一であること、又は、規則的に変化するものであること、の少なくとも一方を意味する。 [Example of Planar Shape and/or Arrangement of Seal Portions in First Laminated Part and Second Laminated Part]
When the side
As exemplified in FIGS. 10(A), (B) and FIGS. 11(A), (B), the first sealing region R1 and the second sealing region R2 are a plurality of seals having a regular planar shape and arrangement. Part S, respectively. At least one of the planar shape and arrangement of the plurality of seal portions S is different between the first seal region R1 and the second seal region R2.
“The plurality of seal portions S have a regular planar shape” means that all the seal portions S within the region have substantially the same planar shape, or that the plurality of seal portions S have a plurality of types of planar shapes. It means at least one of having a shape and having seal portions S of different planar shapes arranged regularly.
“A plurality of seal portions S are regularly arranged” means that the pitch of the seal portions S in the longitudinal direction X and the lateral direction Y is substantially the same, or that the pitch changes regularly. means at least one of
第1シール領域R1及び第2シール領域R2は、それぞれ、一定のシールパターンを有する範囲とする。図10~11に示す例では、第1シール領域R1は、縦方向Xにおいて、一方の端部(例えばウエスト端部8a)からシールパターンが変更される部分までとする。同様に、第2シール領域R2は、縦方向Xにおいて、他方の端部(例えばレッグ端部8b)からシールパターンが変更される部分までとする。第1シール領域R1及び第2シール領域R2の境界線Raは、これらの境界部において縦方向Xに隣り合うシール部S間の間隙を縦方向Xに2等分する線とする。シール列SLの配置等によって境界線Raが直線状にならない場合には、間隙を2等分する複数の線の端部間を結んだ屈曲線を境界線Raとする。
また、第1シール領域R1及び第2シール領域R2の幅でもあるサイド接合部8の全幅は、サイド接合部8の横方向Y外側の側縁から、サイド接合部8の最も横方向Y内側に位置するシール部Sの内端部Saまでの横方向Yにおける寸法とする。 The first seal area R1 and the second seal area R2 are ranges each having a certain seal pattern. In the examples shown in FIGS. 10 and 11, the first seal region R1 extends in the longitudinal direction X from one end (for example, thewaist end 8a) to the portion where the seal pattern is changed. Similarly, the second seal region R2 extends in the longitudinal direction X from the other end (for example, the leg end 8b) to the portion where the seal pattern is changed. A boundary line Ra between the first seal area R1 and the second seal area R2 is a line that bisects the gap between the seal portions S that are adjacent in the longitudinal direction X at the boundary between the first seal area R1 and the second seal area R2. If the boundary line Ra is not linear due to the arrangement of the seal rows SL, etc., the boundary line Ra is defined as a curved line connecting the ends of a plurality of lines that divide the gap into two equal halves.
In addition, the full width of the sidejoint portion 8, which is also the width of the first sealing region R1 and the second sealing region R2, extends from the outer edge of the side joint portion 8 in the horizontal direction Y to the innermost side in the horizontal direction Y of the side joint portion 8. The dimension in the horizontal direction Y to the inner end Sa of the seal portion S located.
また、第1シール領域R1及び第2シール領域R2の幅でもあるサイド接合部8の全幅は、サイド接合部8の横方向Y外側の側縁から、サイド接合部8の最も横方向Y内側に位置するシール部Sの内端部Saまでの横方向Yにおける寸法とする。 The first seal area R1 and the second seal area R2 are ranges each having a certain seal pattern. In the examples shown in FIGS. 10 and 11, the first seal region R1 extends in the longitudinal direction X from one end (for example, the
In addition, the full width of the side
本実施形態において、第1積層部T1は、第1シール領域R1に少なくとも一部が配置される。第2積層部T2は、第2シール領域R2に少なくとも一部が配置される。例えば、第1シール領域R1は、外装体5が折り返されたウエスト端部8a側に位置し、第2シール領域R2は、レッグ端部8b側に位置する。
In the present embodiment, at least a portion of the first laminated portion T1 is arranged in the first seal region R1. At least a portion of the second laminated portion T2 is arranged in the second seal region R2. For example, the first seal region R1 is located on the waist end portion 8a side where the outer body 5 is folded back, and the second seal region R2 is located on the leg end portion 8b side.
第1積層部T1及び第2積層部T2の接合強度の差異を小さくする観点から、第1シール領域R1の全体の面積に対する複数のシール部Sの合計面積の割合は、第2シール領域R2の全体に対する複数のシール部Sの合計面積の割合よりも小さいことが好ましい。以下、各領域R1,R2の全体の面積に対する複数のシール部Sの合計面積の割合を、「シール面積率」とも称する。
この構成により、熱融着する樹脂の量が多い第1積層部T1のシール面積率を、第2積層部T2のシール面積率よりも小さくすることができる。したがって、第2積層部T2に対する第1積層部T1の接合強度の増加を抑制することができ、サイド接合部8の引き裂き安定性を高めることができる。 From the viewpoint of reducing the difference in bonding strength between the first laminated portion T1 and the second laminated portion T2, the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is It is preferably smaller than the ratio of the total area of the plurality of seal portions S to the whole. Hereinafter, the ratio of the total area of the plurality of seal portions S to the total area of each of the regions R1 and R2 is also referred to as "seal area ratio."
With this configuration, the seal area ratio of the first laminated portion T1, which has a large amount of heat-sealed resin, can be made smaller than the seal area ratio of the second laminated portion T2. Therefore, an increase in the bonding strength of the first laminated portion T1 to the second laminated portion T2 can be suppressed, and the tearing stability of the sidejoint portion 8 can be enhanced.
この構成により、熱融着する樹脂の量が多い第1積層部T1のシール面積率を、第2積層部T2のシール面積率よりも小さくすることができる。したがって、第2積層部T2に対する第1積層部T1の接合強度の増加を抑制することができ、サイド接合部8の引き裂き安定性を高めることができる。 From the viewpoint of reducing the difference in bonding strength between the first laminated portion T1 and the second laminated portion T2, the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is It is preferably smaller than the ratio of the total area of the plurality of seal portions S to the whole. Hereinafter, the ratio of the total area of the plurality of seal portions S to the total area of each of the regions R1 and R2 is also referred to as "seal area ratio."
With this configuration, the seal area ratio of the first laminated portion T1, which has a large amount of heat-sealed resin, can be made smaller than the seal area ratio of the second laminated portion T2. Therefore, an increase in the bonding strength of the first laminated portion T1 to the second laminated portion T2 can be suppressed, and the tearing stability of the side
また、第1シール領域R1及び第2シール領域R2の境界線Raは、製造上、第1積層部T1及び第2積層部T2の境界部からずれることが多い。この場合、図10(A)及び図11(A)に示すように、第1シール領域R1は、第1積層部T1から第2積層部T2の一部に延出していることが好ましい。つまり、シール面積率の小さい第1シール領域R1の一部が、シール強度の小さくなりやすい第2積層部T2に配置されていることが好ましい。
この構成では、第2積層部T2の境界部近傍に、シール強度のより小さい領域が配置される。これにより、第1積層部T1と第2積層部T2との間の接合強度が急に上がらず、積層数の変化に伴う廃棄者の違和感を抑制することができる。また、接合強度が一度下がることで、廃棄者が引き裂きの途中で手を休めることができ、廃棄者への引き裂きの負担を低減できる。したがって、サイド接合部8の引き裂き容易性をより効果的に高めることができる。 Further, the boundary line Ra between the first sealing region R1 and the second sealing region R2 is often deviated from the boundary between the first laminated part T1 and the second laminated part T2 in terms of manufacturing. In this case, as shown in FIGS. 10A and 11A, the first seal region R1 preferably extends from the first laminated portion T1 to part of the second laminated portion T2. In other words, it is preferable that a part of the first seal region R1 with a small seal area ratio be arranged in the second laminated portion T2 where the seal strength tends to be small.
In this configuration, a region with a smaller seal strength is arranged near the boundary of the second laminated portion T2. As a result, the bonding strength between the first lamination part T1 and the second lamination part T2 does not suddenly increase, and it is possible to suppress the discomfort of the waste person due to the change in the number of lamination. In addition, since the joint strength is lowered once, the disposal person can rest his/her hands in the middle of tearing, and the burden of tearing on the disposal person can be reduced. Therefore, the ease of tearing of the sidejoint portion 8 can be enhanced more effectively.
この構成では、第2積層部T2の境界部近傍に、シール強度のより小さい領域が配置される。これにより、第1積層部T1と第2積層部T2との間の接合強度が急に上がらず、積層数の変化に伴う廃棄者の違和感を抑制することができる。また、接合強度が一度下がることで、廃棄者が引き裂きの途中で手を休めることができ、廃棄者への引き裂きの負担を低減できる。したがって、サイド接合部8の引き裂き容易性をより効果的に高めることができる。 Further, the boundary line Ra between the first sealing region R1 and the second sealing region R2 is often deviated from the boundary between the first laminated part T1 and the second laminated part T2 in terms of manufacturing. In this case, as shown in FIGS. 10A and 11A, the first seal region R1 preferably extends from the first laminated portion T1 to part of the second laminated portion T2. In other words, it is preferable that a part of the first seal region R1 with a small seal area ratio be arranged in the second laminated portion T2 where the seal strength tends to be small.
In this configuration, a region with a smaller seal strength is arranged near the boundary of the second laminated portion T2. As a result, the bonding strength between the first lamination part T1 and the second lamination part T2 does not suddenly increase, and it is possible to suppress the discomfort of the waste person due to the change in the number of lamination. In addition, since the joint strength is lowered once, the disposal person can rest his/her hands in the middle of tearing, and the burden of tearing on the disposal person can be reduced. Therefore, the ease of tearing of the side
(シール部の配置された領域の幅)
以下、第1シール領域R1及び第2シール領域R2のシール面積率の調整方法の具体例について説明する。なお、図10及び図11の各図においては、説明のため、図3とサイド接合部8の縦横比を変えて記載している。
例えば、図10(A)に示すように、第1シール領域R1における、最も横方向Y内側に配置されたシール部Sの横方向Y内側の内端部Saから、最も横方向Y外側に配置されたシール部Sの横方向Y外側の外端部Sbまでの寸法D6は、第2シール領域R2における、最も横方向Y内側に配置されたシール部Sの横方向Y内側の内端部Saから、最も横方向Y外側に配置されたシール部Sの横方向Y外側の外端部Sbまでの寸法D7よりも小さいことが好ましい。
この場合、寸法D6及びD7は、例えば、シール列SLの数、及び/又はシール部Sの横方向Yにおける寸法等によって調整できる。 (Width of the area where the seal part is arranged)
A specific example of a method for adjusting the sealing area ratios of the first sealing region R1 and the second sealing region R2 will be described below. 10 and 11, the aspect ratio of the sidejoint portion 8 is changed from that in FIG. 3 for the sake of explanation.
For example, as shown in FIG. 10(A), from the inner end portion Sa on the inner side in the lateral direction Y of the seal portion S disposed on the innermost side in the lateral direction Y in the first seal region R1, it is placed on the outermost side in the lateral direction Y. The dimension D6 to the laterally Y outermost outer end Sb of the seal portion S thus formed is the laterally Y innermost inner end portion Sa of the laterally Y innermost seal portion S in the second seal region R2. to the laterally Y outermost outer end portion Sb of the seal portion S disposed most laterally Y outside.
In this case, the dimensions D6 and D7 can be adjusted, for example, by the number of seal rows SL and/or the dimension of the seal portion S in the lateral direction Y, or the like.
以下、第1シール領域R1及び第2シール領域R2のシール面積率の調整方法の具体例について説明する。なお、図10及び図11の各図においては、説明のため、図3とサイド接合部8の縦横比を変えて記載している。
例えば、図10(A)に示すように、第1シール領域R1における、最も横方向Y内側に配置されたシール部Sの横方向Y内側の内端部Saから、最も横方向Y外側に配置されたシール部Sの横方向Y外側の外端部Sbまでの寸法D6は、第2シール領域R2における、最も横方向Y内側に配置されたシール部Sの横方向Y内側の内端部Saから、最も横方向Y外側に配置されたシール部Sの横方向Y外側の外端部Sbまでの寸法D7よりも小さいことが好ましい。
この場合、寸法D6及びD7は、例えば、シール列SLの数、及び/又はシール部Sの横方向Yにおける寸法等によって調整できる。 (Width of the area where the seal part is arranged)
A specific example of a method for adjusting the sealing area ratios of the first sealing region R1 and the second sealing region R2 will be described below. 10 and 11, the aspect ratio of the side
For example, as shown in FIG. 10(A), from the inner end portion Sa on the inner side in the lateral direction Y of the seal portion S disposed on the innermost side in the lateral direction Y in the first seal region R1, it is placed on the outermost side in the lateral direction Y. The dimension D6 to the laterally Y outermost outer end Sb of the seal portion S thus formed is the laterally Y innermost inner end portion Sa of the laterally Y innermost seal portion S in the second seal region R2. to the laterally Y outermost outer end portion Sb of the seal portion S disposed most laterally Y outside.
In this case, the dimensions D6 and D7 can be adjusted, for example, by the number of seal rows SL and/or the dimension of the seal portion S in the lateral direction Y, or the like.
また例えば、図10(A)及び図11(A)に示すように、複数のシール列SLは、第1シール領域R1及び第2シール領域R2に配置されており、第1シール領域R1のシール列の数は、第2シール領域R2のシール列の数よりも少ないことが好ましい。
図10(A)及び図11(A)では、例えば、第1シール領域R1に2つのシール列SLが配置され、第2シール領域R2に3つのシール列SLが配置されている。
これにより、シール列の数の少ない第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 Further, for example, as shown in FIGS. 10A and 11A, the plurality of seal rows SL are arranged in the first seal region R1 and the second seal region R2, and the seal lines in the first seal region R1 are arranged. The number of rows is preferably less than the number of seal rows in the second seal region R2.
In FIGS. 10A and 11A, for example, two seal rows SL are arranged in the first seal region R1 and three seal rows SL are arranged in the second seal region R2.
As a result, the seal area ratio of the first seal region R1, which has a small number of seal rows, can be made smaller than the seal area ratio of the second seal region R2.
図10(A)及び図11(A)では、例えば、第1シール領域R1に2つのシール列SLが配置され、第2シール領域R2に3つのシール列SLが配置されている。
これにより、シール列の数の少ない第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 Further, for example, as shown in FIGS. 10A and 11A, the plurality of seal rows SL are arranged in the first seal region R1 and the second seal region R2, and the seal lines in the first seal region R1 are arranged. The number of rows is preferably less than the number of seal rows in the second seal region R2.
In FIGS. 10A and 11A, for example, two seal rows SL are arranged in the first seal region R1 and three seal rows SL are arranged in the second seal region R2.
As a result, the seal area ratio of the first seal region R1, which has a small number of seal rows, can be made smaller than the seal area ratio of the second seal region R2.
別の例として、図10(B)に示すように、第1シール領域R1の複数のシール部Sの平均面積は、第2シール領域R2の複数のシール部Sの平均面積よりも小さいことが好ましい。
これによっても、複数のシール部Sの平均面積の小さい第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 As another example, as shown in FIG. 10B, the average area of the plurality of seal portions S in the first seal region R1 may be smaller than the average area of the plurality of seal portions S in the second seal region R2. preferable.
This also makes it possible to make the seal area ratio of the first seal region R1, in which the average area of the plurality of seal portions S is small, smaller than the seal area ratio of the second seal region R2.
これによっても、複数のシール部Sの平均面積の小さい第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 As another example, as shown in FIG. 10B, the average area of the plurality of seal portions S in the first seal region R1 may be smaller than the average area of the plurality of seal portions S in the second seal region R2. preferable.
This also makes it possible to make the seal area ratio of the first seal region R1, in which the average area of the plurality of seal portions S is small, smaller than the seal area ratio of the second seal region R2.
また例えば、図11(A)に示すように、複数のシール列SLは、第1シール領域R1及び第2シール領域R2に配置されており、第1シール領域R1のシール部Sの横方向YにおけるピッチD8は、第2シール領域R2の複数のシール列SLの横方向YにおけるピッチD9よりも広いことが好ましい。
これにより、第1シール領域R1のシール部Sを第2シール領域R2のシール部Sよりも疎に配置することができ、第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 Further, for example, as shown in FIG. 11A, the plurality of seal rows SL are arranged in the first seal region R1 and the second seal region R2, and the lateral direction Y of the seal portion S in the first seal region R1 is preferably wider than the pitch D9 in the lateral direction Y of the plurality of seal rows SL in the second seal region R2.
As a result, the seal portions S in the first seal region R1 can be arranged more sparsely than the seal portions S in the second seal region R2. It can be smaller than the area ratio.
これにより、第1シール領域R1のシール部Sを第2シール領域R2のシール部Sよりも疎に配置することができ、第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 Further, for example, as shown in FIG. 11A, the plurality of seal rows SL are arranged in the first seal region R1 and the second seal region R2, and the lateral direction Y of the seal portion S in the first seal region R1 is preferably wider than the pitch D9 in the lateral direction Y of the plurality of seal rows SL in the second seal region R2.
As a result, the seal portions S in the first seal region R1 can be arranged more sparsely than the seal portions S in the second seal region R2. It can be smaller than the area ratio.
例えば、図11(B)に示すように、第1シール領域R1の複数のシール列SLの縦方向XにおけるピッチD10は、第2シール領域R2の複数のシール列SLの縦方向XにおけるピッチD11よりも広いことが好ましい。
これによっても、第1シール領域R1のシール部Sを第2シール領域R2のシール部Sよりも疎に配置することができ、第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 For example, as shown in FIG. 11B, the pitch D10 in the longitudinal direction X of the plurality of seal rows SL in the first sealing region R1 is equal to the pitch D11 in the longitudinal direction X of the plurality of seal rows SL in the second sealing region R2. is preferably wider than
This also allows the seal portions S in the first seal region R1 to be arranged more sparsely than the seal portions S in the second seal region R2, and the seal area ratio of the first seal region R1 to that of the second seal region R2. It can be smaller than the seal area ratio.
これによっても、第1シール領域R1のシール部Sを第2シール領域R2のシール部Sよりも疎に配置することができ、第1シール領域R1のシール面積率を、第2シール領域R2のシール面積率よりも小さくすることができる。 For example, as shown in FIG. 11B, the pitch D10 in the longitudinal direction X of the plurality of seal rows SL in the first sealing region R1 is equal to the pitch D11 in the longitudinal direction X of the plurality of seal rows SL in the second sealing region R2. is preferably wider than
This also allows the seal portions S in the first seal region R1 to be arranged more sparsely than the seal portions S in the second seal region R2, and the seal area ratio of the first seal region R1 to that of the second seal region R2. It can be smaller than the seal area ratio.
[第1積層部及び第2積層部における肌側シートの構成例]
第1積層部T1と第2積層部T2における接合強度を調整し、引き裂き安定性の向上を図る観点からは、異なる構成の第1肌側シートP1及び第2肌側シートP2を採用してもよい。 [Configuration example of the skin-side sheet in the first lamination part and the second lamination part]
From the viewpoint of adjusting the bonding strength between the first laminated portion T1 and the second laminated portion T2 and improving the tearing stability, the first skin side sheet P1 and the second skin side sheet P2 having different configurations may be adopted. good.
第1積層部T1と第2積層部T2における接合強度を調整し、引き裂き安定性の向上を図る観点からは、異なる構成の第1肌側シートP1及び第2肌側シートP2を採用してもよい。 [Configuration example of the skin-side sheet in the first lamination part and the second lamination part]
From the viewpoint of adjusting the bonding strength between the first laminated portion T1 and the second laminated portion T2 and improving the tearing stability, the first skin side sheet P1 and the second skin side sheet P2 having different configurations may be adopted. good.
(肌側シートにおけるエンボス部の配置)
本実施形態において、第1肌側シートP1及び第2肌側シートP2は、それぞれ、複数のエンボスを含むスパンボンド不織布で構成されてもよい。
スパンボンド不織布のエンボスは、繊維が圧着されて融着した部分である。エンボスは、例えば、エンボス凸ロールとフラットロールなどによる熱圧着により間欠的に形成されたもの、超音波融着により形成されたもの、間欠的に熱風を加えて部分融着させて形成されたものなどが挙げられる。高い生産性と低い装置コストという観点から、エンボスは熱圧着により形成されたものが好ましい。
エンボスの平面形状は、円形状、楕円形状、多角形状、又はこれらに類似する形状等の任意の形状を採り得る。エンボスは、一定のパターンで形成されることが好ましいが、ランダムなパターンで形成されていてもよい。
エンボスでは、形成時の加熱処理及び/又は加工処理によって繊維が切れやすいため、シール部Sのエンボスと重なった場合、シール強度が低下し得る。 (Arrangement of embossed portions on skin-side sheet)
In the present embodiment, each of the first skin-side sheet P1 and the second skin-side sheet P2 may be made of a spunbond nonwoven fabric having a plurality of embossments.
The embossments of the spunbond nonwoven fabric are the portions where the fibers are crimped and fused. The embossing is, for example, intermittently formed by thermocompression bonding using an embossing convex roll and a flat roll, etc., formed by ultrasonic fusion, or formed by intermittently applying hot air to partially fuse. etc. From the viewpoint of high productivity and low equipment cost, the embossing is preferably formed by thermocompression bonding.
The planar shape of the embossing may take any shape such as circular, elliptical, polygonal, or similar shapes. The embossing is preferably formed in a regular pattern, but may be formed in a random pattern.
In the embossing, the fibers are likely to break due to heat treatment and/or processing during formation, so when the embossing overlaps with the embossing of the seal portion S, the seal strength may decrease.
本実施形態において、第1肌側シートP1及び第2肌側シートP2は、それぞれ、複数のエンボスを含むスパンボンド不織布で構成されてもよい。
スパンボンド不織布のエンボスは、繊維が圧着されて融着した部分である。エンボスは、例えば、エンボス凸ロールとフラットロールなどによる熱圧着により間欠的に形成されたもの、超音波融着により形成されたもの、間欠的に熱風を加えて部分融着させて形成されたものなどが挙げられる。高い生産性と低い装置コストという観点から、エンボスは熱圧着により形成されたものが好ましい。
エンボスの平面形状は、円形状、楕円形状、多角形状、又はこれらに類似する形状等の任意の形状を採り得る。エンボスは、一定のパターンで形成されることが好ましいが、ランダムなパターンで形成されていてもよい。
エンボスでは、形成時の加熱処理及び/又は加工処理によって繊維が切れやすいため、シール部Sのエンボスと重なった場合、シール強度が低下し得る。 (Arrangement of embossed portions on skin-side sheet)
In the present embodiment, each of the first skin-side sheet P1 and the second skin-side sheet P2 may be made of a spunbond nonwoven fabric having a plurality of embossments.
The embossments of the spunbond nonwoven fabric are the portions where the fibers are crimped and fused. The embossing is, for example, intermittently formed by thermocompression bonding using an embossing convex roll and a flat roll, etc., formed by ultrasonic fusion, or formed by intermittently applying hot air to partially fuse. etc. From the viewpoint of high productivity and low equipment cost, the embossing is preferably formed by thermocompression bonding.
The planar shape of the embossing may take any shape such as circular, elliptical, polygonal, or similar shapes. The embossing is preferably formed in a regular pattern, but may be formed in a random pattern.
In the embossing, the fibers are likely to break due to heat treatment and/or processing during formation, so when the embossing overlaps with the embossing of the seal portion S, the seal strength may decrease.
そこで、第1肌側シートP1と第2肌側シートP2とで、エンボスの面積率、つまり所定の領域の総面積に対する当該領域のうち複数のエンボスが占める領域の合計面積の比率が相互に異なるスパンボンド不織布で構成することが好ましい。具体的に、第1肌側シートP1では第2肌側シートP2よりもエンボスの面積率が高いことが好ましい。
スパンボンド不織布におけるエンボスの面積率は、複数のエンボスを十分多く含む領域で測定され、例えば、スパンボンド不織布の20mm×20mmの正方形状の領域で測定することができる。各エンボスが占める領域は、繊維の熱融着が見られる一連の領域として認識することができる。なお、上記面積率の測定は、展開伸長状態で行うものとする。 Therefore, the first skin-side sheet P1 and the second skin-side sheet P2 have different embossed area ratios, that is, the ratio of the total area of the regions occupied by a plurality of embossings in the predetermined region to the total area of the predetermined region. It is preferably composed of a spunbond nonwoven fabric. Specifically, the first skin-side sheet P1 preferably has a higher embossed area ratio than the second skin-side sheet P2.
The embossed area ratio in the spunbond nonwoven fabric is measured in a region containing a sufficiently large number of embossments, and can be measured in a 20 mm×20 mm square region of the spunbond nonwoven fabric, for example. The area occupied by each embossment can be recognized as a series of areas where thermal fusion of the fibers is observed. In addition, the measurement of the above-mentioned area ratio shall be performed in the unfolded and stretched state.
スパンボンド不織布におけるエンボスの面積率は、複数のエンボスを十分多く含む領域で測定され、例えば、スパンボンド不織布の20mm×20mmの正方形状の領域で測定することができる。各エンボスが占める領域は、繊維の熱融着が見られる一連の領域として認識することができる。なお、上記面積率の測定は、展開伸長状態で行うものとする。 Therefore, the first skin-side sheet P1 and the second skin-side sheet P2 have different embossed area ratios, that is, the ratio of the total area of the regions occupied by a plurality of embossings in the predetermined region to the total area of the predetermined region. It is preferably composed of a spunbond nonwoven fabric. Specifically, the first skin-side sheet P1 preferably has a higher embossed area ratio than the second skin-side sheet P2.
The embossed area ratio in the spunbond nonwoven fabric is measured in a region containing a sufficiently large number of embossments, and can be measured in a 20 mm×20 mm square region of the spunbond nonwoven fabric, for example. The area occupied by each embossment can be recognized as a series of areas where thermal fusion of the fibers is observed. In addition, the measurement of the above-mentioned area ratio shall be performed in the unfolded and stretched state.
上述のように、エンボスと重なったシール部Sでは、シール強度が低下し得る。このため、積層数が多い第1積層部T1において、エンボスの面積率を高くすることにより、第1積層部T1においてシール部Sとエンボスとをより重なりやすくし、シール強度が高まることを抑制できる。これにより、第1積層部T1と第2積層部T2との間の接合強度の差を小さくすることができ、サイド接合部8全体における接合強度をより安定化させることができる。したがって、サイド接合部8の引き裂き安定性を高めることができる。
As described above, the seal strength may be reduced in the seal portion S that overlaps the embossment. Therefore, by increasing the embossed area ratio in the first laminated portion T1 having a large number of laminated layers, the seal portion S and the embossed portions are more easily overlapped in the first laminated portion T1, and an increase in the seal strength can be suppressed. . As a result, the difference in joint strength between the first laminated portion T1 and the second laminated portion T2 can be reduced, and the joint strength of the entire side joint portion 8 can be further stabilized. Therefore, the tearing stability of the side joint portion 8 can be enhanced.
第1肌側シートP1のエンボスの面積率は、好ましくは5%以上、より好ましくは7%以上であり、好ましくは20%以下、より好ましくは17%以下である。
第2肌側シートP2のエンボスの面積率は、好ましくは3%以上、より好ましくは5%以上であり、好ましくは17%以下、より好ましくは15%以下である。 The embossed area ratio of the first skin side sheet P1 is preferably 5% or more, more preferably 7% or more, and preferably 20% or less, more preferably 17% or less.
The embossed area ratio of the second skin side sheet P2 is preferably 3% or more, more preferably 5% or more, and preferably 17% or less, more preferably 15% or less.
第2肌側シートP2のエンボスの面積率は、好ましくは3%以上、より好ましくは5%以上であり、好ましくは17%以下、より好ましくは15%以下である。 The embossed area ratio of the first skin side sheet P1 is preferably 5% or more, more preferably 7% or more, and preferably 20% or less, more preferably 17% or less.
The embossed area ratio of the second skin side sheet P2 is preferably 3% or more, more preferably 5% or more, and preferably 17% or less, more preferably 15% or less.
(肌側シートの融点)
他の例として、第1肌側シートP1の融点は、第2肌側シートP2の融点よりも高いことが好ましい。
融点の高い熱可塑性シート50は、融点の低い熱可塑性シート50と比較して、同一の条件のシール工程を実施した場合に熱融着しにくくなり、シール強度が低下しやすくなる。このため、積層数が多い第1積層部T1において、第1肌側シートP1の融点を高くすることにより、第1積層部T1のシール部Sのシール強度が高まることを抑制することができる。これにより、第1積層部T1と第2積層部T2との間の接合強度の差を小さくすることができ、サイド接合部8全体における接合強度をより安定化させることができる。したがって、サイド接合部8の引き裂き容易性を高めることができる。 (melting point of skin side sheet)
As another example, the melting point of the first skin side sheet P1 is preferably higher than the melting point of the second skin side sheet P2.
Thethermoplastic sheet 50 with a high melting point is less likely to be heat-sealed than the thermoplastic sheet 50 with a low melting point when the sealing process is performed under the same conditions, and the sealing strength tends to decrease. Therefore, by increasing the melting point of the first skin-side sheet P1 in the first laminated portion T1 having a large number of laminated layers, it is possible to suppress an increase in the seal strength of the seal portion S of the first laminated portion T1. As a result, the difference in joint strength between the first laminated portion T1 and the second laminated portion T2 can be reduced, and the joint strength of the entire side joint portion 8 can be further stabilized. Therefore, the ease of tearing the side joint portion 8 can be enhanced.
他の例として、第1肌側シートP1の融点は、第2肌側シートP2の融点よりも高いことが好ましい。
融点の高い熱可塑性シート50は、融点の低い熱可塑性シート50と比較して、同一の条件のシール工程を実施した場合に熱融着しにくくなり、シール強度が低下しやすくなる。このため、積層数が多い第1積層部T1において、第1肌側シートP1の融点を高くすることにより、第1積層部T1のシール部Sのシール強度が高まることを抑制することができる。これにより、第1積層部T1と第2積層部T2との間の接合強度の差を小さくすることができ、サイド接合部8全体における接合強度をより安定化させることができる。したがって、サイド接合部8の引き裂き容易性を高めることができる。 (melting point of skin side sheet)
As another example, the melting point of the first skin side sheet P1 is preferably higher than the melting point of the second skin side sheet P2.
The
第1肌側シートP1の融点は、好ましくは125℃以上、より好ましくは155℃以上であり、好ましくは260℃以下、より好ましくは250℃以下である。
第2肌側シートP2の融点は、好ましくは123℃以上、より好ましくは125℃以上であり、好ましくは180℃以下、より好ましくは170℃以下である。 The melting point of the first skin side sheet P1 is preferably 125° C. or higher, more preferably 155° C. or higher, and preferably 260° C. or lower, more preferably 250° C. or lower.
The melting point of the second skin side sheet P2 is preferably 123° C. or higher, more preferably 125° C. or higher, and preferably 180° C. or lower, more preferably 170° C. or lower.
第2肌側シートP2の融点は、好ましくは123℃以上、より好ましくは125℃以上であり、好ましくは180℃以下、より好ましくは170℃以下である。 The melting point of the first skin side sheet P1 is preferably 125° C. or higher, more preferably 155° C. or higher, and preferably 260° C. or lower, more preferably 250° C. or lower.
The melting point of the second skin side sheet P2 is preferably 123° C. or higher, more preferably 125° C. or higher, and preferably 180° C. or lower, more preferably 170° C. or lower.
(肌側シートの坪量)
他の例として、第1肌側シートP1の坪量は、第2肌側シートP2の坪量よりも低いことが好ましい。
坪量の高い熱可塑性シート50では、熱可塑性樹脂の量も多くなり、シール部Sのシール強度が高くなりやすい。このため、積層数が多い第1積層部T1において、第1肌側シートP1の坪量を低くすることにより、第1積層部T1のシール部Sのシール強度が高まることを抑制することができる。これにより、第1積層部T1と第2積層部T2との間の接合強度の差を小さくすることができ、サイド接合部8全体における接合強度をより安定化させることができる。したがって、サイド接合部8の引き裂き安定性を高めることができる。 (Basis weight of skin side sheet)
As another example, the basis weight of the first skin-side sheet P1 is preferably lower than the basis weight of the second skin-side sheet P2.
In thethermoplastic sheet 50 with a high basis weight, the amount of thermoplastic resin is also large, and the seal strength of the seal portion S tends to be high. Therefore, in the first laminated portion T1 having a large number of laminated layers, by reducing the basis weight of the first skin-side sheet P1, it is possible to suppress an increase in the seal strength of the seal portion S of the first laminated portion T1. . As a result, the difference in joint strength between the first laminated portion T1 and the second laminated portion T2 can be reduced, and the joint strength of the entire side joint portion 8 can be further stabilized. Therefore, the tearing stability of the side joint portion 8 can be enhanced.
他の例として、第1肌側シートP1の坪量は、第2肌側シートP2の坪量よりも低いことが好ましい。
坪量の高い熱可塑性シート50では、熱可塑性樹脂の量も多くなり、シール部Sのシール強度が高くなりやすい。このため、積層数が多い第1積層部T1において、第1肌側シートP1の坪量を低くすることにより、第1積層部T1のシール部Sのシール強度が高まることを抑制することができる。これにより、第1積層部T1と第2積層部T2との間の接合強度の差を小さくすることができ、サイド接合部8全体における接合強度をより安定化させることができる。したがって、サイド接合部8の引き裂き安定性を高めることができる。 (Basis weight of skin side sheet)
As another example, the basis weight of the first skin-side sheet P1 is preferably lower than the basis weight of the second skin-side sheet P2.
In the
第1肌側シートP1の坪量は、好ましくは10g/m2以上、より好ましくは12g/m2以上であり、好ましくは30g/m2以下、より好ましくは25g/m2以下である。
第2肌側シートP2の坪量は、好ましくは12g/m2以上、より好ましくは14g/m2以上であり、好ましくは40g/m2以下、より好ましくは30g/m2以下である。 The basis weight of the first skin side sheet P1 is preferably 10 g/m 2 or more, more preferably 12 g/m 2 or more, and preferably 30 g/m 2 or less, more preferably 25 g/m 2 or less.
The basis weight of the second skin side sheet P2 is preferably 12 g/m 2 or more, more preferably 14 g/m 2 or more, and preferably 40 g/m 2 or less, more preferably 30 g/m 2 or less.
第2肌側シートP2の坪量は、好ましくは12g/m2以上、より好ましくは14g/m2以上であり、好ましくは40g/m2以下、より好ましくは30g/m2以下である。 The basis weight of the first skin side sheet P1 is preferably 10 g/m 2 or more, more preferably 12 g/m 2 or more, and preferably 30 g/m 2 or less, more preferably 25 g/m 2 or less.
The basis weight of the second skin side sheet P2 is preferably 12 g/m 2 or more, more preferably 14 g/m 2 or more, and preferably 40 g/m 2 or less, more preferably 30 g/m 2 or less.
<第2実施形態>
次に、他の実施形態について説明する。なお、以下の各実施形態において、上述の第1実施形態と同一又は対応する構成については、同一の符号を付して適宜説明を省略する。また、各実施形態のパンツ型吸収性物品(パンツ型使い捨ておむつ)は、可能な範囲で、第1実施形態で説明した構成を適用することができる。 <Second embodiment>
Next, another embodiment will be described. In addition, in each of the following embodiments, the same reference numerals are given to the same or corresponding configurations as those of the above-described first embodiment, and the description thereof will be omitted as appropriate. In addition, the configuration described in the first embodiment can be applied to the pants-type absorbent article (underpants-type disposable diaper) of each embodiment to the extent possible.
次に、他の実施形態について説明する。なお、以下の各実施形態において、上述の第1実施形態と同一又は対応する構成については、同一の符号を付して適宜説明を省略する。また、各実施形態のパンツ型吸収性物品(パンツ型使い捨ておむつ)は、可能な範囲で、第1実施形態で説明した構成を適用することができる。 <Second embodiment>
Next, another embodiment will be described. In addition, in each of the following embodiments, the same reference numerals are given to the same or corresponding configurations as those of the above-described first embodiment, and the description thereof will be omitted as appropriate. In addition, the configuration described in the first embodiment can be applied to the pants-type absorbent article (underpants-type disposable diaper) of each embodiment to the extent possible.
第1実施形態では、複数のシール部Sは、縦方向X及び横方向Yに沿って並んだ格子状の配置であると説明したが、これに限定されない。
例えば、図12に示すように、横方向Yに隣り合う2つのシール列SLにおいて、一方のシール列SLの複数のシール部Sは、他方のシール列SLの複数のシール部Sと縦方向Xにずれて配置されてもよい。
この構成においても、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有する。これにより、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。 In the first embodiment, the plurality of seal portions S are arranged in a grid pattern along the vertical direction X and the horizontal direction Y, but the present invention is not limited to this.
For example, as shown in FIG. 12, in two seal rows SL adjacent to each other in the lateral direction Y, the plurality of seal portions S of one seal row SL are aligned with the plurality of seal portions S of the other seal row SL in the longitudinal direction X. may be displaced from each other.
Also in this configuration, of the two seal portions S that belong to different seal rows SL and are adjacent to each other in the lateral direction Y, the seal portion S that is positioned on the inner side in the lateral direction Y is larger than the seal portion S that is positioned on the outer side in the lateral direction Y. It has low seal strength. As a result, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
例えば、図12に示すように、横方向Yに隣り合う2つのシール列SLにおいて、一方のシール列SLの複数のシール部Sは、他方のシール列SLの複数のシール部Sと縦方向Xにずれて配置されてもよい。
この構成においても、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有する。これにより、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。 In the first embodiment, the plurality of seal portions S are arranged in a grid pattern along the vertical direction X and the horizontal direction Y, but the present invention is not limited to this.
For example, as shown in FIG. 12, in two seal rows SL adjacent to each other in the lateral direction Y, the plurality of seal portions S of one seal row SL are aligned with the plurality of seal portions S of the other seal row SL in the longitudinal direction X. may be displaced from each other.
Also in this configuration, of the two seal portions S that belong to different seal rows SL and are adjacent to each other in the lateral direction Y, the seal portion S that is positioned on the inner side in the lateral direction Y is larger than the seal portion S that is positioned on the outer side in the lateral direction Y. It has low seal strength. As a result, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
図12に示すように、引き裂き安定性を向上させる観点から、各シール列SLのシール部Sの縦方向Xにおけるピッチは、少なくともウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方において一定であることが好ましい。この構成において、横方向Yに隣り合う2つのシール列SLでは、複数のシール部Sの縦方向Xにおけるピッチが同一であることが好ましい。さらに、一方のシール列SLのシール部Sと他方のシール列SLのシール部Sの縦方向Xにおけるずれは、当該ピッチの1/2であることがより好ましい。
As shown in FIG. 12, from the viewpoint of improving tearing stability, the pitch in the longitudinal direction X of the seal portions S of each seal row SL is constant in at least one of the waist end region 8c and the leg end region 8d. Preferably. In this configuration, it is preferable that the plurality of seal portions S have the same pitch in the longitudinal direction X in two seal rows SL adjacent to each other in the lateral direction Y. As shown in FIG. Further, the displacement in the vertical direction X between the seal portions S of one seal row SL and the seal portions S of the other seal row SL is more preferably 1/2 of the pitch.
<第3実施形態>
上述の第1実施形態では、外装体5の折り返し構造として、外層シート51のみ折り返す構成について説明したが、これに限定されない。
本実施形態では、図13に示すように、外層シート51及び内層シート52の双方が折り返されていてもよい。 <Third Embodiment>
In the above-described first embodiment, as the folding structure of theexterior body 5, a configuration in which only the outer layer sheet 51 is folded has been described, but the present invention is not limited to this.
In this embodiment, as shown in FIG. 13, both theouter layer sheet 51 and the inner layer sheet 52 may be folded.
上述の第1実施形態では、外装体5の折り返し構造として、外層シート51のみ折り返す構成について説明したが、これに限定されない。
本実施形態では、図13に示すように、外層シート51及び内層シート52の双方が折り返されていてもよい。 <Third Embodiment>
In the above-described first embodiment, as the folding structure of the
In this embodiment, as shown in FIG. 13, both the
図13に示す例では、外層シート51及び内層シート52がウエスト開口端Waから肌側に折り返されている。折り返された領域の外層シート51及び内層シート52のレッグ側の端部は、縦方向Xにおいて略同一の位置に配置される。
In the example shown in FIG. 13, the outer layer sheet 51 and the inner layer sheet 52 are folded back from the waist opening end Wa toward the skin side. The leg-side ends of the outer layer sheet 51 and the inner layer sheet 52 in the folded region are arranged at substantially the same position in the longitudinal direction X. As shown in FIG.
本実施形態のサイド接合部8を有するパンツ型吸収性物品においても、ウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方では、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有する。これにより、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。
Also in the pants-type absorbent article having the side joints 8 of the present embodiment, two seal portions belonging to different seal rows SL and adjacent to each other in the lateral direction Y are provided in at least one of the waist end region 8c and the leg end region 8d. Among S, the seal portion S located on the inner side in the lateral direction Y has a lower seal strength than the seal portion S located on the outer side in the lateral direction Y. As a result, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
また、第1実施形態と同様に、サイド接合部8は、第1肌側シートP1を含み6以上の熱可塑性シート50が積層された第1積層部T1と、第2肌側シートP2を含み第1積層部T1よりも少ない数の熱可塑性シート50が積層された第2積層部T2と、を有する。本実施形態においても、第1積層部T1は、外装体5が折り返された領域に相当する。
Further, as in the first embodiment, the side joint portion 8 includes a first laminated portion T1 in which six or more thermoplastic sheets 50 including the first skin side sheet P1 are laminated, and a second skin side sheet P2. and a second laminated portion T2 in which thermoplastic sheets 50 are laminated in a number smaller than that of the first laminated portion T1. Also in the present embodiment, the first laminated portion T1 corresponds to a region where the exterior body 5 is folded back.
図13に示す例では、腹側領域5aの第1積層部T1は、折り返されていない外層シート51と、折り返されていない内層シート52と、折り返された内層シート52と、折り返された外層シート51と、の4層で構成される。背側領域5bの第1積層部T1も、同様の4層で構成される。これにより、第1積層部T1は、合計8層で構成される。第1積層部T1において、第1肌側シートP1は、折り返された外層シート51で構成される。
図13に示す例では、腹側領域5aの第2積層部T2は、折り返されていない外層シート51と、折り返されていない内層シート52と、の2層で構成される。背側領域5bの第2積層部T2も、同様の2層で構成される。これにより、第2積層部T2は、合計4層で構成される。第2積層部T2において、第2肌側シートP2は、折り返されていない内層シート52で構成される。 In the example shown in FIG. 13, the first laminated portion T1 of theventral region 5a includes an outer layer sheet 51 that is not folded, an inner layer sheet 52 that is not folded, an inner layer sheet 52 that is folded, and an outer layer sheet that is folded. 51 and 4 layers. The first laminated portion T1 of the dorsal region 5b is also composed of the same four layers. Thus, the first laminated section T1 is composed of eight layers in total. In the first laminated portion T1, the first skin side sheet P1 is composed of the outer layer sheet 51 folded back.
In the example shown in FIG. 13, the second laminated portion T2 of theventral region 5a is composed of two layers, an outer layer sheet 51 that is not folded back and an inner layer sheet 52 that is not folded back. The second laminated portion T2 of the dorsal region 5b is also composed of two similar layers. As a result, the second lamination part T2 is composed of a total of four layers. In the second laminated portion T2, the second skin side sheet P2 is composed of the inner layer sheet 52 that is not folded back.
図13に示す例では、腹側領域5aの第2積層部T2は、折り返されていない外層シート51と、折り返されていない内層シート52と、の2層で構成される。背側領域5bの第2積層部T2も、同様の2層で構成される。これにより、第2積層部T2は、合計4層で構成される。第2積層部T2において、第2肌側シートP2は、折り返されていない内層シート52で構成される。 In the example shown in FIG. 13, the first laminated portion T1 of the
In the example shown in FIG. 13, the second laminated portion T2 of the
この構成においても、第1実施形態と同様に、第1シール領域R1の全体の面積に対する複数のシール部Sの合計面積の割合を、第2シール領域R2の全体の面積に対する複数のシール部Sの合計面積の割合よりも小さくすることが好ましい。また、第1肌側シートP1及び第2肌側シートP2を、第1実施形態の「第1積層部及び第2積層部における肌側シートの構成例」の項で説明した構成とすることができる。これらにより、サイド接合部8全体における接合強度をより安定化させることができる。
Also in this configuration, similarly to the first embodiment, the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is calculated as follows: is preferably smaller than the ratio of the total area of In addition, the first skin-side sheet P1 and the second skin-side sheet P2 may be configured as described in the section "Configuration Example of the Skin-Side Sheets in the First Laminated Part and the Second Laminated Part" of the first embodiment. can. As a result, the joint strength of the entire side joint portion 8 can be further stabilized.
<第4実施形態>
折り返し構造を有する外装体5の構成は、上述の例に限定されない。例えば、外層シート51の折り返された領域の端部である折り返し端部51aと、内層シート52の折り返された領域の端部である折り返し端部52aの位置が縦方向Xにおいて異なっていてもよい。
図14に示す例では、内層シート52の折り返し端部52aが、外層シート51の折り返し端部51aよりも縦方向Xにおいてウエスト側に位置している。図14に示す例において、ウエスト端部領域8cでは、外層シート51及び内層シート52の双方が折り返されている。 <Fourth Embodiment>
The configuration of theexterior body 5 having the folded structure is not limited to the above example. For example, the positions of the folded end portion 51a, which is the end portion of the folded region of the outer layer sheet 51, and the folded end portion 52a, which is the end portion of the folded region of the inner layer sheet 52, may differ in the longitudinal direction X. .
In the example shown in FIG. 14 , the foldedend portion 52 a of the inner layer sheet 52 is positioned closer to the waist in the longitudinal direction X than the folded end portion 51 a of the outer layer sheet 51 . In the example shown in FIG. 14, both the outer layer sheet 51 and the inner layer sheet 52 are folded back in the waist end region 8c.
折り返し構造を有する外装体5の構成は、上述の例に限定されない。例えば、外層シート51の折り返された領域の端部である折り返し端部51aと、内層シート52の折り返された領域の端部である折り返し端部52aの位置が縦方向Xにおいて異なっていてもよい。
図14に示す例では、内層シート52の折り返し端部52aが、外層シート51の折り返し端部51aよりも縦方向Xにおいてウエスト側に位置している。図14に示す例において、ウエスト端部領域8cでは、外層シート51及び内層シート52の双方が折り返されている。 <Fourth Embodiment>
The configuration of the
In the example shown in FIG. 14 , the folded
本実施形態のサイド接合部8を有するパンツ型吸収性物品においても、ウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方では、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有する。これにより、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。
Also in the pants-type absorbent article having the side joints 8 of the present embodiment, two seal portions belonging to different seal rows SL and adjacent to each other in the lateral direction Y are provided in at least one of the waist end region 8c and the leg end region 8d. Among S, the seal portion S located on the inner side in the lateral direction Y has a lower seal strength than the seal portion S located on the outer side in the lateral direction Y. As a result, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
また、本実施形態でも、サイド接合部8は、第1肌側シートP1を含む6以上の熱可塑性シート50が積層された第1積層部T1と、第2肌側シートP2を含む第1積層部T1よりも少ない数の熱可塑性シート50が積層された第2積層部T2と、を有する。この例において、第1積層部T1は、外装体5が折り返された領域に相当する。
さらに、本実施形態では、第1積層部T1が、熱可塑性シート50の積層数の異なる領域を含む。つまり、第1積層部T1は、第2積層部T2に隣接し第2積層部T2よりも多い数の熱可塑性シート50が積層されたレッグ側積層部T12と、レッグ側積層部T12よりも多い数の熱可塑性シート50が積層されたウエスト側積層部T11と、を含む。例えばウエスト端部領域8cは、ウエスト側積層部T11に含まれる。 Also in this embodiment, the sidejoint portion 8 includes a first laminated portion T1 in which six or more thermoplastic sheets 50 including the first skin side sheet P1 are laminated, and a first laminated portion including the second skin side sheet P2. and a second laminated portion T2 in which thermoplastic sheets 50 are laminated in a number smaller than that of the portion T1. In this example, the first laminated portion T1 corresponds to a region where the exterior body 5 is folded.
Furthermore, in the present embodiment, the first laminated portion T1 includes regions in which thethermoplastic sheets 50 are laminated in different numbers. That is, the first laminated portion T1 includes a leg-side laminated portion T12 adjacent to the second laminated portion T2 and having more thermoplastic sheets 50 laminated than the second laminated portion T2, and a leg-side laminated portion T12 having more thermoplastic sheets 50 than the leg-side laminated portion T12. and a waist side laminated portion T11 in which a number of thermoplastic sheets 50 are laminated. For example, the waist end region 8c is included in the waist side laminated portion T11.
さらに、本実施形態では、第1積層部T1が、熱可塑性シート50の積層数の異なる領域を含む。つまり、第1積層部T1は、第2積層部T2に隣接し第2積層部T2よりも多い数の熱可塑性シート50が積層されたレッグ側積層部T12と、レッグ側積層部T12よりも多い数の熱可塑性シート50が積層されたウエスト側積層部T11と、を含む。例えばウエスト端部領域8cは、ウエスト側積層部T11に含まれる。 Also in this embodiment, the side
Furthermore, in the present embodiment, the first laminated portion T1 includes regions in which the
図14に示す例では、腹側領域5aのウエスト側積層部T11は、折り返されていない外層シート51と、折り返されていない内層シート52と、折り返された内層シート52と、折り返された外層シート51と、の4層で構成される。背側領域5bのウエスト側積層部T11も、同様の4層で構成される。これにより、ウエスト側積層部T11は、合計8層で構成される。
また、腹側領域5aのレッグ側積層部T12は、折り返されていない外層シート51と、折り返されていない内層シート52と、折り返された外層シート51と、の3層で構成される。背側領域5bのレッグ側積層部T12も、同様の3層で構成される。これにより、レッグ側積層部T12は、合計6層で構成される。
また、ウエスト側積層部T11及びレッグ側積層部T12のいずれも、第1肌側シートP1は、折り返された外層シート51で構成される。
図14に示す例では、腹側領域5aの第2積層部T2は、折り返されていない外層シート51と、折り返されていない内層シート52と、の2層で構成される。背側領域5bの第2積層部T2も、同様の2層で構成される。これにより、第2積層部T2は、合計4層で構成される。第2積層部T2において、第2肌側シートP2は、折り返されていない内層シート52で構成される。 In the example shown in FIG. 14, the waist-side laminated portion T11 of theventral region 5a includes an unfolded outer layer sheet 51, an unfolded inner layer sheet 52, a folded inner layer sheet 52, and a folded outer layer sheet. 51 and 4 layers. The waist-side laminated portion T11 of the back region 5b is also composed of the same four layers. Thus, the waist-side laminated portion T11 is composed of a total of eight layers.
In addition, the leg-side laminated portion T12 of theventral region 5a is composed of three layers: an outer layer sheet 51 that is not folded back, an inner layer sheet 52 that is not folded back, and an outer layer sheet 51 that is folded back. The leg-side laminated portion T12 of the dorsal region 5b is also composed of the same three layers. Thus, the leg-side laminated portion T12 is composed of a total of six layers.
In both the waist-side laminated portion T11 and the leg-side laminated portion T12, the first skin-side sheet P1 is composed of theouter layer sheet 51 folded back.
In the example shown in FIG. 14, the second laminated portion T2 of theventral region 5a is composed of two layers, an outer layer sheet 51 that is not folded back and an inner layer sheet 52 that is not folded back. The second laminated portion T2 of the dorsal region 5b is also composed of two similar layers. As a result, the second lamination part T2 is composed of a total of four layers. In the second laminated portion T2, the second skin side sheet P2 is composed of the inner layer sheet 52 that is not folded back.
また、腹側領域5aのレッグ側積層部T12は、折り返されていない外層シート51と、折り返されていない内層シート52と、折り返された外層シート51と、の3層で構成される。背側領域5bのレッグ側積層部T12も、同様の3層で構成される。これにより、レッグ側積層部T12は、合計6層で構成される。
また、ウエスト側積層部T11及びレッグ側積層部T12のいずれも、第1肌側シートP1は、折り返された外層シート51で構成される。
図14に示す例では、腹側領域5aの第2積層部T2は、折り返されていない外層シート51と、折り返されていない内層シート52と、の2層で構成される。背側領域5bの第2積層部T2も、同様の2層で構成される。これにより、第2積層部T2は、合計4層で構成される。第2積層部T2において、第2肌側シートP2は、折り返されていない内層シート52で構成される。 In the example shown in FIG. 14, the waist-side laminated portion T11 of the
In addition, the leg-side laminated portion T12 of the
In both the waist-side laminated portion T11 and the leg-side laminated portion T12, the first skin-side sheet P1 is composed of the
In the example shown in FIG. 14, the second laminated portion T2 of the
この構成においても、第1実施形態と同様に、第1シール領域R1の全体の面積に対する複数のシール部Sの合計面積の割合を、第2シール領域R2の全体の面積に対する複数のシール部Sの合計面積の割合よりも小さくすることが好ましい。さらに、第1シール領域R1においては、ウエスト側積層部T11の全体の面積に対する複数のシール部Sの合計面積の割合を、レッグ側積層部T12の全体の面積に対する複数のシール部Sの合計面積の割合よりも小さくすることが好ましい。
また、第1肌側シートP1及び第2肌側シートP2を、第1実施形態の「第1積層部及び第2積層部における肌側シートの構成例」の項で説明した構成とすることができる。これらにより、サイド接合部8全体における接合強度をより安定化させることができる。 Also in this configuration, similarly to the first embodiment, the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is calculated as follows: is preferably smaller than the ratio of the total area of Furthermore, in the first seal region R1, the ratio of the total area of the plurality of seal portions S to the total area of the waist-side laminated portion T11 is calculated as the total area of the plurality of seal portions S to the total area of the leg-side laminated portion T12. is preferably smaller than the ratio of
In addition, the first skin-side sheet P1 and the second skin-side sheet P2 may be configured as described in the section "Configuration example of the skin-side sheet in the first laminated portion and the second laminated portion" of the first embodiment. can. As a result, the joint strength of the entire sidejoint portion 8 can be further stabilized.
また、第1肌側シートP1及び第2肌側シートP2を、第1実施形態の「第1積層部及び第2積層部における肌側シートの構成例」の項で説明した構成とすることができる。これらにより、サイド接合部8全体における接合強度をより安定化させることができる。 Also in this configuration, similarly to the first embodiment, the ratio of the total area of the plurality of seal portions S to the total area of the first seal region R1 is calculated as follows: is preferably smaller than the ratio of the total area of Furthermore, in the first seal region R1, the ratio of the total area of the plurality of seal portions S to the total area of the waist-side laminated portion T11 is calculated as the total area of the plurality of seal portions S to the total area of the leg-side laminated portion T12. is preferably smaller than the ratio of
In addition, the first skin-side sheet P1 and the second skin-side sheet P2 may be configured as described in the section "Configuration example of the skin-side sheet in the first laminated portion and the second laminated portion" of the first embodiment. can. As a result, the joint strength of the entire side
<第5実施形態>
本発明のパンツ型吸収性物品は、外装体5が折り返し構造を有していなくてもよい。
本実施形態では、図15に示すように、外層シート51及び内層シート52の双方が折り返されておらず、これらのシートの端部がウエスト開口端Waに一致していてもよい。
つまり、この例では、外装体5は、全体が同一の積層数で構成され、例えば、腹側領域5a及び背側領域5bがそれぞれ外層シート51と内層シート52の2層で構成される。つまり、サイド接合部8の全体において、内層シート52が、肌対向面を構成する肌側シートPとなる。 <Fifth Embodiment>
In the pants-type absorbent article of the present invention, theexterior body 5 may not have a folded structure.
In this embodiment, as shown in FIG. 15, both theouter layer sheet 51 and the inner layer sheet 52 may not be folded back, and the edges of these sheets may coincide with the waist opening edge Wa.
That is, in this example, theexterior body 5 as a whole is composed of the same number of laminations, and for example, the ventral region 5a and the dorsal region 5b are composed of two layers, the outer layer sheet 51 and the inner layer sheet 52, respectively. That is, in the entire side joint portion 8, the inner layer sheet 52 serves as the skin-side sheet P forming the skin-facing surface.
本発明のパンツ型吸収性物品は、外装体5が折り返し構造を有していなくてもよい。
本実施形態では、図15に示すように、外層シート51及び内層シート52の双方が折り返されておらず、これらのシートの端部がウエスト開口端Waに一致していてもよい。
つまり、この例では、外装体5は、全体が同一の積層数で構成され、例えば、腹側領域5a及び背側領域5bがそれぞれ外層シート51と内層シート52の2層で構成される。つまり、サイド接合部8の全体において、内層シート52が、肌対向面を構成する肌側シートPとなる。 <Fifth Embodiment>
In the pants-type absorbent article of the present invention, the
In this embodiment, as shown in FIG. 15, both the
That is, in this example, the
本実施形態のサイド接合部8を有するパンツ型吸収性物品においても、ウエスト端部領域8c又はレッグ端部領域8dの少なくとも一方では、異なるシール列SLに属し横方向Yに隣り合う2つのシール部Sのうち、横方向Y内側に位置するシール部Sは、横方向Y外側に位置するシール部Sよりも、低いシール強度を有する。これにより、着用時及び着用動作時の剥がれの防止と、廃棄時の引き裂き容易性とを両立させることができる。
Also in the pants-type absorbent article having the side joints 8 of the present embodiment, two seal portions belonging to different seal rows SL and adjacent to each other in the lateral direction Y are provided in at least one of the waist end region 8c and the leg end region 8d. Among S, the seal portion S located on the inner side in the lateral direction Y has a lower seal strength than the seal portion S located on the outer side in the lateral direction Y. As a result, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
また、本実施形態では、肌側シートPは、サイド接合部8全体における接合強度をより安定化させる観点から、サイド接合部8全体において同一の不織布で構成されることが好ましい。
例えば、肌側シートPは、複数のエンボスを含むスパンボンド不織布で構成されることが好ましく、サイド接合部8の全体において、エンボス間の距離が実質的に一定であることが好ましい。なお、「エンボス間の距離が実質的に一定」とは、10箇所以上のエンボス間の最短距離を比較した場合に、最も小さい距離を100%とした場合に、最も大きい距離が110%以下に収まっていることを意味する。
例えば、本実施形態では、肌側シートPの融点は、サイド接合部8全体において、実質的に一定であることが好ましい。「肌側シートPの融点は、サイド接合部8全体において、実質的に一定」とは、サイド接合部8における10箇所以上の肌側シートPの融点を比較した場合に、最も低い融点を100%とした場合に、最も高い融点が110%以下に収まっていることを意味する。
例えば、本実施形態では、肌側シートPの坪量は、サイド接合部8全体において、実質的に一定であることが好ましい。「肌側シートPの坪量は、サイド接合部8全体において、実質的に一定」とは、サイド接合部8における10箇所以上の肌側シートPの坪量を比較した場合に、最も低い坪量を100%とした場合に、最も高い坪量が110%以下に収まっていることを意味する。 Moreover, in the present embodiment, the skin-side sheet P is preferably made of the same nonwoven fabric over theentire side joints 8 from the viewpoint of further stabilizing the joint strength in the entire side joints 8 .
For example, the skin-side sheet P is preferably composed of a spunbond nonwoven fabric including a plurality of embossments, and the distance between the embossments is preferably substantially constant throughout the side joints 8 . It should be noted that "the distance between embossments is substantially constant" means that when the shortest distance between 10 or more embossments is compared, the smallest distance is 100%, and the largest distance is 110% or less. means it fits.
For example, in the present embodiment, the melting point of the skin-side sheet P is preferably substantially constant throughout the sidejoint portion 8 . "The melting point of the skin side sheet P is substantially constant in the entire side joint portion 8" means that when the melting points of the skin side sheet P at 10 or more locations in the side joint portion 8 are compared, the lowest melting point is set to 100. %, the highest melting point is 110% or less.
For example, in the present embodiment, the basis weight of the skin-side sheet P is preferably substantially constant throughout the side joints 8 . "The basis weight of the skin-side sheet P is substantially constant over the entire sidejoint portion 8" means that the basis weight of the skin-side sheet P at 10 or more locations in the side joint portion 8 is the lowest basis weight. When the amount is 100%, it means that the highest basis weight falls within 110% or less.
例えば、肌側シートPは、複数のエンボスを含むスパンボンド不織布で構成されることが好ましく、サイド接合部8の全体において、エンボス間の距離が実質的に一定であることが好ましい。なお、「エンボス間の距離が実質的に一定」とは、10箇所以上のエンボス間の最短距離を比較した場合に、最も小さい距離を100%とした場合に、最も大きい距離が110%以下に収まっていることを意味する。
例えば、本実施形態では、肌側シートPの融点は、サイド接合部8全体において、実質的に一定であることが好ましい。「肌側シートPの融点は、サイド接合部8全体において、実質的に一定」とは、サイド接合部8における10箇所以上の肌側シートPの融点を比較した場合に、最も低い融点を100%とした場合に、最も高い融点が110%以下に収まっていることを意味する。
例えば、本実施形態では、肌側シートPの坪量は、サイド接合部8全体において、実質的に一定であることが好ましい。「肌側シートPの坪量は、サイド接合部8全体において、実質的に一定」とは、サイド接合部8における10箇所以上の肌側シートPの坪量を比較した場合に、最も低い坪量を100%とした場合に、最も高い坪量が110%以下に収まっていることを意味する。 Moreover, in the present embodiment, the skin-side sheet P is preferably made of the same nonwoven fabric over the
For example, the skin-side sheet P is preferably composed of a spunbond nonwoven fabric including a plurality of embossments, and the distance between the embossments is preferably substantially constant throughout the side joints 8 . It should be noted that "the distance between embossments is substantially constant" means that when the shortest distance between 10 or more embossments is compared, the smallest distance is 100%, and the largest distance is 110% or less. means it fits.
For example, in the present embodiment, the melting point of the skin-side sheet P is preferably substantially constant throughout the side
For example, in the present embodiment, the basis weight of the skin-side sheet P is preferably substantially constant throughout the side joints 8 . "The basis weight of the skin-side sheet P is substantially constant over the entire side
<第6実施形態>
第1実施形態では、シール列SLがウエスト端部領域8cに配置される場合について説明したが、図16に示すように、シール列SLは、レッグ端部領域8dに配置されてもよい。これにより、着用者が臥位であって、廃棄者がレッグ端部8bからサイド接合部8を引き裂く場合でも、上述の引き裂き容易性を実現することができる。 <Sixth Embodiment>
Although the seal line SL is arranged in thewaist end region 8c in the first embodiment, the seal line SL may be arranged in the leg end region 8d as shown in FIG. As a result, even when the wearer is lying down and the disposal person tears the side joint portion 8 from the leg end portion 8b, the ease of tearing described above can be realized.
第1実施形態では、シール列SLがウエスト端部領域8cに配置される場合について説明したが、図16に示すように、シール列SLは、レッグ端部領域8dに配置されてもよい。これにより、着用者が臥位であって、廃棄者がレッグ端部8bからサイド接合部8を引き裂く場合でも、上述の引き裂き容易性を実現することができる。 <Sixth Embodiment>
Although the seal line SL is arranged in the
あるいは、図17に示すように、シール列SLは、ウエスト端部8aから縦方向Xに25mm以内のウエスト端部領域8cと、レッグ端部8bから縦方向Xに25mm以内のレッグ端部領域8dとを合わせた領域であってもよい。これにより、廃棄者がウエスト端部8a又はレッグ端部8bのいずれからサイド接合部8を引き裂く場合でも、上述の引き裂き容易性を実現することができる。
Alternatively, as shown in FIG. 17, the seal line SL includes a waist end region 8c within 25 mm in the longitudinal direction X from the waist end 8a and a leg end region 8d within 25 mm in the longitudinal direction X from the leg end 8b. It may be a combined area. As a result, even when the disposal person tears the side joints 8 from either the waist end 8a or the leg end 8b, the ease of tearing described above can be realized.
<他の実施形態>
以上、本発明の実施形態について説明したが、本発明は上述の実施形態にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。 <Other embodiments>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.
以上、本発明の実施形態について説明したが、本発明は上述の実施形態にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。 <Other embodiments>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.
本発明においては、少なくとも、隣り合う2つのシール部Sにおけるシール強度の関係が上記関係を満たせばよいため、1つのシール列SLの全てのシール部Sのシール強度が、その横方向Y外側に位置するシール列SLの全てのシール部Sのシール強度より低くなっていなくてもよい。
In the present invention, since at least the relationship between the seal strengths of two adjacent seal portions S should satisfy the above relationship, the seal strengths of all the seal portions S in one seal row SL are It does not have to be lower than the seal strength of all the seal portions S of the seal row SL located.
上述の実施形態では、一対のサイド接合部8が同様の構成を有すると説明したが、一方のサイド接合部8のみが上述の複数のシール列SLを含む構成を有していてもよい。
In the above-described embodiment, the pair of side joints 8 have the same configuration, but only one side joint 8 may have the above-described plurality of seal rows SL.
例えば、上述の実施形態では、外装体5が、腹側領域5aと、背側領域5bと、股下領域5cと、を有すると説明したが、これに限定されない。例えば、外装体5は、股下領域を有さず、腹側領域と背側領域とが分割された構成を有していてもよい。
For example, in the above-described embodiment, the outer body 5 has the ventral area 5a, the dorsal area 5b, and the crotch area 5c, but it is not limited to this. For example, the outer body 5 may have a configuration in which an abdominal region and a dorsal region are divided without having a crotch region.
本発明に係るパンツ型吸収性物品は、乳幼児用の使い捨ておむつでなくてもよく、例えば、大人用や子供用の使い捨ておむつであってもよい。さらに、本発明に係るパンツ型吸収性物品は、下半身に着用するタイプの吸収性物品であれば、使い捨ておむつでなくてもよい。このようなパンツ型吸収性物品としては、例えば、パンツ型の生理用ナプキンなどが挙げられる。
The pants-type absorbent article according to the present invention does not have to be a disposable diaper for infants, and may be a disposable diaper for adults or children, for example. Furthermore, the pants-type absorbent article according to the present invention does not have to be a disposable diaper as long as it is an absorbent article of the type worn on the lower half of the body. Such pants-type absorbent articles include, for example, pants-type sanitary napkins.
上述した実施形態に関し、本発明はさらに以下のパンツ型吸収性物品を開示する。
<1>
着用者の腹側から股間部を通って背側に延びる縦方向と、前記縦方向に直交し着用者の左右方向に対応する横方向と、を備え、かつ、
吸収性本体と、前記吸収性本体の非肌対向面側に配置され、前記縦方向の両側に位置する腹側領域及び背側領域を含み、複数の熱可塑性シートが積層されて構成された外装体と、前記外装体の前記腹側領域と前記背側領域とを前記横方向の側縁部において接合する一対のサイド接合部と、を備えるパンツ型吸収性物品であって、
前記一対のサイド接合部は、
前記縦方向におけるウエスト側の端部であるウエスト端部から前記縦方向に25mm以内のウエスト端部領域と、
前記縦方向におけるレッグ側の端部であるレッグ端部から前記縦方向に25mm以内のレッグ端部領域と、をそれぞれ有し、
前記一対のサイド接合部の少なくとも一方は、
前記縦方向に沿って離間して整列した複数のシール部でそれぞれ構成され、前記横方向に沿って前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方に配列された複数のシール列をさらに有し、
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、低いシール強度を有する
パンツ型吸収性物品。
<2>
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、繊維の溶融度合いが低い
<1>に記載のパンツ型吸収性物品。
<3>
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、厚く構成される
<1>又は<2>に記載のパンツ型吸収性物品。
<4>
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、小さな面積を有する
<1>から<3>のいずれか一つに記載のパンツ型吸収性物品。
<5>
前記横方向において最も外側に位置するシール列を外側シール列、前記外側シール列と前記横方向内側に隣り合うシール列を内側シール列とした場合に、
前記外側シール列の前記シール部の前記横方向外側の外端部と、前記内側シール列の前記シール部の前記横方向内側の内端部との間の前記横方向における距離は、第1寸法であり、
前記外側シール列では、前記複数のシール部が前記縦方向に前記第1寸法よりも小さい第2寸法の間隔をあけて配置されている
<1>から<4>のいずれか一つに記載のパンツ型吸収性物品。
<6>
前記複数のシール列に含まれる複数のシール部は、前記横方向に沿って整列している
<1>から<5>のいずれか一つに記載のパンツ型吸収性物品。
<7>
前記複数のシール列を含む前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方を、前記縦方向に10mm、前記横方向に前記サイド接合部の全幅を含む長さの長方形状に切り出して測定用サンプルを形成し、前記測定用サンプルを前記横方向内側から外側に向かって10mm/minの速さで剥離させてシール強度を測定した場合、
前記複数のシール列に対応するピーク強度間の最小強度が、0Nよりも大きくなる
<1>から<6>のいずれか一つに記載のパンツ型吸収性物品。
<8> 前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方には、前記複数のシール列として3以上のシール列が配置されており、
前記3以上のシール列を含む前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方のシール強度を測定した場合に、前記3以上のシール列にそれぞれ対応する3以上のピーク強度が測定され、
前記3以上のピーク強度間の最小強度は、前記横方向内側から外側に向かって測定される順に増加する
<7>に記載のパンツ型吸収性物品。
<9>
前記横方向において最も外側に位置するシール列を外側シール列、前記外側シール列と前記横方向内側に隣り合うシール列を内側シール列とした場合に、
前記外側シール列の前記シール部と、前記内側シール列の前記シール部との前記横方向における間隔に対する、前記内側シール列の前記シール部の前記横方向における寸法の比率は、好ましくは0.2以上、より好ましくは0.3以上である
<1>から<8>のいずれか一つに記載のパンツ型吸収性物品。
<10>
前記横方向に隣り合う前記シール列の前記シール部の間隔は、前記横方向内側から外側に向かって、減少するように構成される
<1>から<9>のいずれか一つに記載のパンツ型吸収性物品。
<11>
前記複数のシール列の前記横方向におけるピッチは、4mm以上である
<1>から<10>のいずれか一つに記載のパンツ型吸収性物品。
<12>
前記複数のシール部の前記縦方向におけるピッチは、1.5mm以上5.0mm以下である
<1>から<11>のいずれか一つに記載のパンツ型吸収性物品。
<13>
前記腹側領域及び前記背側領域は、それぞれ、
前記横方向に延びる複数の弾性部材が配置され、前記一対のサイド接合部の一方から他方まで前記横方向に延びる第1伸縮領域及び第2伸縮領域を有し、
前記第1伸縮領域は、前記ウエスト端部領域から前記横方向に延び、
前記第2伸縮領域は、前記第1伸縮領域と前記縦方向に隣接し、前記サイド接合部の前記ウエスト端部領域を除く領域から前記横方向に延び、
前記第1伸縮領域における前記複数の弾性部材の平均伸張率は、前記第2伸縮領域における前記複数の弾性部材の平均伸張率よりも低い
<1>から<12>のいずれか一つに記載のパンツ型吸収性物品。
<14>
前記腹側領域及び前記背側領域は、それぞれ、前記一対のサイド接合部の一方から他方まで前記横方向に延びる複数の弾性部材を有し、
前記サイド接合部における前記複数の弾性部材の前記縦方向におけるピッチは、前記複数のシール部の前記縦方向におけるピッチよりも大きく、かつ、前記複数のシール部の前記縦方向におけるピッチの整数倍ではない
<1>から<13>のいずれか一つに記載のパンツ型吸収性物品。
<15>
前記サイド接合部は、
規則的な平面形状及び配置を有する複数のシール部をそれぞれ含み、前記横方向において前記サイド接合部の全幅にわたって延び、かつ、前記縦方向に隣接した第1シール領域及び第2シール領域と、
6以上の前記熱可塑性シートが積層され、前記第1シール領域に少なくとも一部が配置された第1積層部と、
前記第1積層部よりも少ない数の前記熱可塑性シートが積層され、前記第2シール領域に少なくとも一部が配置された第2積層部と、を有し、
前記第1シール領域及び前記第2シール領域では、前記複数のシール部の平面形状又は配置の少なくとも一方が異なり、
前記第1シール領域の全体の面積に対する、前記第1シール領域に含まれる複数のシール部の合計面積の割合は、前記第2シール領域の全体の面積に対する、前記第2シール領域に含まれる複数のシール部の合計面積の割合よりも小さい
<1>から<14>のいずれか一つに記載のパンツ型吸収性物品。
<16>
前記第1シール領域における、最も前記横方向内側に配置された前記シール部の前記横方向内側の内端部から、最も前記横方向外側に配置された前記シール部の前記横方向外側の前記外端部までの寸法は、前記第2シール領域における、最も前記横方向内側に配置された前記シール部の前記横方向内側の内端部から、最も前記横方向外側に配置された前記シール部の前記横方向外側の外端部までの寸法よりも小さい
<15>に記載のパンツ型吸収性物品。
<17>
前記複数のシール列は、前記第1シール領域及び前記第2シール領域に配置されており、
前記第1シール領域のシール列の数は、前記第2シール領域のシール列の数よりも少ない
<15>又は<16>に記載のパンツ型吸収性物品。
<18>
前記第1シール領域の前記複数のシール部の平均面積は、前記第2シール領域の前記複数のシール部の平均面積よりも小さい
<15>から<17>のいずれか一つに記載のパンツ型吸収性物品。
<19> 前記第1シール領域の前記シール部の前記横方向におけるピッチは、前記第2シール領域の前記シール部の前記横方向におけるピッチよりも広い
<15>から<18>のいずれか一つに記載のパンツ型吸収性物品。
<20>
前記第1シール領域の前記シール部の前記縦方向におけるピッチは、前記第2シール領域の前記シール部の前記縦方向におけるピッチよりも広い
<15>から<19>のいずれか一つに記載のパンツ型吸収性物品。
<21>
前記第1シール領域は、前記第1積層部から前記第2積層部の一部に延出している
<15>から<20>のいずれか一つに記載のパンツ型吸収性物品。
<22>
前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、をさらに有し、
前記第1肌側シートと、前記第2肌側シートとが、それぞれ、複数のエンボスを含むスパンボンド不織布で構成され、
前記第1肌側シートにおける前記エンボスの面積率は、前記第2肌側シートにおける前記エンボスの面積率よりも高い
<1>から<21>のいずれか一つに記載のパンツ型吸収性物品。
<23>
前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、を有し、
前記第1肌側シートの融点は、前記第2肌側シートの融点よりも高い
<1>から<22>のいずれか一つに記載のパンツ型吸収性物品。
<24>
前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、を有し、
前記第1肌側シートの坪量は、前記第2肌側シートの坪量よりも低い
<1>から<23>のいずれか一つに記載のパンツ型吸収性物品。 Regarding the above-described embodiment, the present invention further discloses the following pants-type absorbent article.
<1>
a longitudinal direction extending from the abdomen of the wearer through the crotch to the dorsal side; and a lateral direction orthogonal to the longitudinal direction and corresponding to the lateral direction of the wearer;
An absorbent main body, and an outer covering composed of a plurality of laminated thermoplastic sheets, including an absorbent main body and a ventral region and a dorsal region disposed on the non-skin-facing side of the absorbent main body and positioned on both sides in the longitudinal direction. A pants-type absorbent article comprising a body and a pair of side joints that join the ventral region and the dorsal region of the outer body at the lateral side edges,
The pair of side joints are
a waist edge region within 25 mm in the longitudinal direction from the waist edge, which is the waist-side edge in the longitudinal direction;
a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction;
At least one of the pair of side joints,
a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have
Of the two laterally adjacent seal portions belonging to different seal rows, the laterally inner seal portion has a lower seal strength than the laterally outer seal portion. Goods.
<2>
Of the two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion located on the inner side in the lateral direction has a lower degree of melting of the fibers than the seal portion located on the outer side in the lateral direction <1> The pants-type absorbent article according to 1.
<3>
<1> or <, of two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion positioned on the inner side in the lateral direction is configured to be thicker than the seal portion positioned on the outer side in the lateral direction. 2>, the pants-type absorbent article.
<4>
Of the two seal portions that belong to different seal rows and are adjacent to each other in the lateral direction, the seal portion that is positioned on the inner side in the lateral direction has a smaller area than the seal portion that is positioned on the outer side in the lateral direction <1> to <3>, the underpants-type absorbent article.
<5>
When the outermost seal row in the lateral direction is the outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row,
The lateral distance between the laterally outer outer ends of the seal portions of the outer seal row and the laterally inner inner ends of the seal portions of the inner seal row is a first dimension. and
The outer seal row according to any one of <1> to <4>, wherein the plurality of seal portions are arranged in the longitudinal direction at intervals of a second dimension smaller than the first dimension. A pants-type absorbent article.
<6>
The underpants-type absorbent article according to any one of <1> to <5>, wherein the plurality of seal portions included in the plurality of seal rows are aligned along the lateral direction.
<7>
At least one of the waist end region and the leg end region including the plurality of seal rows is cut into a rectangular shape with a length of 10 mm in the vertical direction and a length including the full width of the side joint in the horizontal direction. A sample for measurement is formed, and the seal strength is measured by peeling the measurement sample from the inner side to the outer side in the lateral direction at a speed of 10 mm / min.
The underpants-type absorbent article according to any one of <1> to <6>, wherein a minimum strength between peak strengths corresponding to the plurality of seal rows is greater than 0N.
<8> three or more seal rows are arranged as the plurality of seal rows in at least one of the waist end region and the leg end region;
when the seal strength of at least one of the waist end region and the leg end region including the three or more seal rows is measured, three or more peak strengths corresponding to the three or more seal rows are measured;
The underpants-type absorbent article according to <7>, wherein the minimum intensity between the three or more peak intensities increases in the order measured from the inner side to the outer side in the lateral direction.
<9>
When the outermost seal row in the lateral direction is the outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row,
The ratio of the lateral dimension of the seal portion of the inner seal row to the lateral distance between the seal portion of the outer seal row and the seal portion of the inner seal row is preferably 0.2. The pants-type absorbent article according to any one of <1> to <8>, and more preferably 0.3 or more.
<10>
The pants according to any one of <1> to <9>, wherein the interval between the seal portions of the laterally adjacent seal rows is configured to decrease from the inner side to the outer side in the lateral direction. type absorbent article.
<11>
The underpants-type absorbent article according to any one of <1> to <10>, wherein a pitch of the plurality of seal rows in the horizontal direction is 4 mm or more.
<12>
The underpants-type absorbent article according to any one of <1> to <11>, wherein a pitch of the plurality of seal portions in the vertical direction is 1.5 mm or more and 5.0 mm or less.
<13>
The ventral region and the dorsal region, respectively,
A plurality of elastic members extending in the lateral direction are arranged and have a first stretchable region and a second stretchable region extending in the lateral direction from one to the other of the pair of side joints,
the first elastic region extends in the lateral direction from the waist end region;
the second stretchable region is adjacent to the first stretchable region in the longitudinal direction and extends in the lateral direction from a region of the side joints excluding the waist end region;
According to any one of <1> to <12>, the average elongation rate of the plurality of elastic members in the first elastic region is lower than the average elongation rate of the plurality of elastic members in the second elastic region. A pants-type absorbent article.
<14>
the ventral region and the dorsal region each have a plurality of elastic members extending in the lateral direction from one of the pair of side joints to the other;
The pitch of the plurality of elastic members in the longitudinal direction at the side joint portion is larger than the pitch of the plurality of seal portions in the longitudinal direction, and is an integral multiple of the pitch of the plurality of seal portions in the longitudinal direction. The pants-type absorbent article according to any one of <1> to <13>.
<15>
The side joints are
a first sealing area and a second sealing area each including a plurality of sealing portions each having a regular planar shape and arrangement, extending across the entire width of the side joint portion in the lateral direction and adjacent to the longitudinal direction;
a first laminated portion in which six or more thermoplastic sheets are laminated and at least a portion of which is arranged in the first seal region;
a second laminated portion in which the thermoplastic sheets are laminated in a number smaller than that of the first laminated portion, and at least a portion of which is arranged in the second seal region;
At least one of planar shape or arrangement of the plurality of seal portions differs between the first seal region and the second seal region,
The ratio of the total area of the plurality of seal portions included in the first seal region to the entire area of the first seal region is the ratio of the total area of the plurality of seal portions included in the second seal region to the entire area of the second seal region. The pants-type absorbent article according to any one of <1> to <14>.
<16>
In the first seal region, from the laterally inner inner end portion of the seal portion that is disposed most laterally inward, the laterally outer side of the seal portion that is disposed most laterally outward The dimension to the end is the distance from the laterally inner inner end of the laterally innermost seal portion to the laterally outermost seal portion in the second seal region. The underpants-type absorbent article according to <15>, which is smaller than the dimension to the laterally outer outer end.
<17>
The plurality of seal rows are arranged in the first seal area and the second seal area,
The pants-type absorbent article according to <15> or <16>, wherein the number of seal rows in the first seal region is smaller than the number of seal rows in the second seal region.
<18>
The underpants type according to any one of <15> to <17>, wherein the average area of the plurality of seal portions in the first seal region is smaller than the average area of the plurality of seal portions in the second seal region absorbent article.
<19> Any one of <15> to <18>, wherein the pitch in the lateral direction of the seal portions in the first seal region is wider than the pitch in the lateral direction of the seal portions in the second seal region The pants-type absorbent article according to 1.
<20>
<19> according to any one of <15> to <19>, wherein the pitch in the longitudinal direction of the seal portions in the first seal region is wider than the pitch in the longitudinal direction of the seal portions in the second seal region A pants-type absorbent article.
<21>
The underpants-type absorbent article according to any one of <15> to <20>, wherein the first seal region extends from the first laminated portion to a part of the second laminated portion.
<22>
The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet forming a skin-facing surface and having a smaller number of thermoplastic sheets laminated than the first laminated portion;
The first skin-side sheet and the second skin-side sheet are each composed of a spunbond nonwoven fabric containing a plurality of embossments,
The underpants-type absorbent article according to any one of <1> to <21>, wherein the embossed area ratio of the first skin-side sheet is higher than the embossed area ratio of the second skin-side sheet.
<23>
The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet that forms a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
The underpants-type absorbent article according to any one of <1> to <22>, wherein the melting point of the first skin-side sheet is higher than the melting point of the second skin-side sheet.
<24>
The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet that forms a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
The pants-type absorbent article according to any one of <1> to <23>, wherein the basis weight of the first skin-side sheet is lower than the basis weight of the second skin-side sheet.
<1>
着用者の腹側から股間部を通って背側に延びる縦方向と、前記縦方向に直交し着用者の左右方向に対応する横方向と、を備え、かつ、
吸収性本体と、前記吸収性本体の非肌対向面側に配置され、前記縦方向の両側に位置する腹側領域及び背側領域を含み、複数の熱可塑性シートが積層されて構成された外装体と、前記外装体の前記腹側領域と前記背側領域とを前記横方向の側縁部において接合する一対のサイド接合部と、を備えるパンツ型吸収性物品であって、
前記一対のサイド接合部は、
前記縦方向におけるウエスト側の端部であるウエスト端部から前記縦方向に25mm以内のウエスト端部領域と、
前記縦方向におけるレッグ側の端部であるレッグ端部から前記縦方向に25mm以内のレッグ端部領域と、をそれぞれ有し、
前記一対のサイド接合部の少なくとも一方は、
前記縦方向に沿って離間して整列した複数のシール部でそれぞれ構成され、前記横方向に沿って前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方に配列された複数のシール列をさらに有し、
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、低いシール強度を有する
パンツ型吸収性物品。
<2>
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、繊維の溶融度合いが低い
<1>に記載のパンツ型吸収性物品。
<3>
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、厚く構成される
<1>又は<2>に記載のパンツ型吸収性物品。
<4>
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、小さな面積を有する
<1>から<3>のいずれか一つに記載のパンツ型吸収性物品。
<5>
前記横方向において最も外側に位置するシール列を外側シール列、前記外側シール列と前記横方向内側に隣り合うシール列を内側シール列とした場合に、
前記外側シール列の前記シール部の前記横方向外側の外端部と、前記内側シール列の前記シール部の前記横方向内側の内端部との間の前記横方向における距離は、第1寸法であり、
前記外側シール列では、前記複数のシール部が前記縦方向に前記第1寸法よりも小さい第2寸法の間隔をあけて配置されている
<1>から<4>のいずれか一つに記載のパンツ型吸収性物品。
<6>
前記複数のシール列に含まれる複数のシール部は、前記横方向に沿って整列している
<1>から<5>のいずれか一つに記載のパンツ型吸収性物品。
<7>
前記複数のシール列を含む前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方を、前記縦方向に10mm、前記横方向に前記サイド接合部の全幅を含む長さの長方形状に切り出して測定用サンプルを形成し、前記測定用サンプルを前記横方向内側から外側に向かって10mm/minの速さで剥離させてシール強度を測定した場合、
前記複数のシール列に対応するピーク強度間の最小強度が、0Nよりも大きくなる
<1>から<6>のいずれか一つに記載のパンツ型吸収性物品。
<8> 前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方には、前記複数のシール列として3以上のシール列が配置されており、
前記3以上のシール列を含む前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方のシール強度を測定した場合に、前記3以上のシール列にそれぞれ対応する3以上のピーク強度が測定され、
前記3以上のピーク強度間の最小強度は、前記横方向内側から外側に向かって測定される順に増加する
<7>に記載のパンツ型吸収性物品。
<9>
前記横方向において最も外側に位置するシール列を外側シール列、前記外側シール列と前記横方向内側に隣り合うシール列を内側シール列とした場合に、
前記外側シール列の前記シール部と、前記内側シール列の前記シール部との前記横方向における間隔に対する、前記内側シール列の前記シール部の前記横方向における寸法の比率は、好ましくは0.2以上、より好ましくは0.3以上である
<1>から<8>のいずれか一つに記載のパンツ型吸収性物品。
<10>
前記横方向に隣り合う前記シール列の前記シール部の間隔は、前記横方向内側から外側に向かって、減少するように構成される
<1>から<9>のいずれか一つに記載のパンツ型吸収性物品。
<11>
前記複数のシール列の前記横方向におけるピッチは、4mm以上である
<1>から<10>のいずれか一つに記載のパンツ型吸収性物品。
<12>
前記複数のシール部の前記縦方向におけるピッチは、1.5mm以上5.0mm以下である
<1>から<11>のいずれか一つに記載のパンツ型吸収性物品。
<13>
前記腹側領域及び前記背側領域は、それぞれ、
前記横方向に延びる複数の弾性部材が配置され、前記一対のサイド接合部の一方から他方まで前記横方向に延びる第1伸縮領域及び第2伸縮領域を有し、
前記第1伸縮領域は、前記ウエスト端部領域から前記横方向に延び、
前記第2伸縮領域は、前記第1伸縮領域と前記縦方向に隣接し、前記サイド接合部の前記ウエスト端部領域を除く領域から前記横方向に延び、
前記第1伸縮領域における前記複数の弾性部材の平均伸張率は、前記第2伸縮領域における前記複数の弾性部材の平均伸張率よりも低い
<1>から<12>のいずれか一つに記載のパンツ型吸収性物品。
<14>
前記腹側領域及び前記背側領域は、それぞれ、前記一対のサイド接合部の一方から他方まで前記横方向に延びる複数の弾性部材を有し、
前記サイド接合部における前記複数の弾性部材の前記縦方向におけるピッチは、前記複数のシール部の前記縦方向におけるピッチよりも大きく、かつ、前記複数のシール部の前記縦方向におけるピッチの整数倍ではない
<1>から<13>のいずれか一つに記載のパンツ型吸収性物品。
<15>
前記サイド接合部は、
規則的な平面形状及び配置を有する複数のシール部をそれぞれ含み、前記横方向において前記サイド接合部の全幅にわたって延び、かつ、前記縦方向に隣接した第1シール領域及び第2シール領域と、
6以上の前記熱可塑性シートが積層され、前記第1シール領域に少なくとも一部が配置された第1積層部と、
前記第1積層部よりも少ない数の前記熱可塑性シートが積層され、前記第2シール領域に少なくとも一部が配置された第2積層部と、を有し、
前記第1シール領域及び前記第2シール領域では、前記複数のシール部の平面形状又は配置の少なくとも一方が異なり、
前記第1シール領域の全体の面積に対する、前記第1シール領域に含まれる複数のシール部の合計面積の割合は、前記第2シール領域の全体の面積に対する、前記第2シール領域に含まれる複数のシール部の合計面積の割合よりも小さい
<1>から<14>のいずれか一つに記載のパンツ型吸収性物品。
<16>
前記第1シール領域における、最も前記横方向内側に配置された前記シール部の前記横方向内側の内端部から、最も前記横方向外側に配置された前記シール部の前記横方向外側の前記外端部までの寸法は、前記第2シール領域における、最も前記横方向内側に配置された前記シール部の前記横方向内側の内端部から、最も前記横方向外側に配置された前記シール部の前記横方向外側の外端部までの寸法よりも小さい
<15>に記載のパンツ型吸収性物品。
<17>
前記複数のシール列は、前記第1シール領域及び前記第2シール領域に配置されており、
前記第1シール領域のシール列の数は、前記第2シール領域のシール列の数よりも少ない
<15>又は<16>に記載のパンツ型吸収性物品。
<18>
前記第1シール領域の前記複数のシール部の平均面積は、前記第2シール領域の前記複数のシール部の平均面積よりも小さい
<15>から<17>のいずれか一つに記載のパンツ型吸収性物品。
<19> 前記第1シール領域の前記シール部の前記横方向におけるピッチは、前記第2シール領域の前記シール部の前記横方向におけるピッチよりも広い
<15>から<18>のいずれか一つに記載のパンツ型吸収性物品。
<20>
前記第1シール領域の前記シール部の前記縦方向におけるピッチは、前記第2シール領域の前記シール部の前記縦方向におけるピッチよりも広い
<15>から<19>のいずれか一つに記載のパンツ型吸収性物品。
<21>
前記第1シール領域は、前記第1積層部から前記第2積層部の一部に延出している
<15>から<20>のいずれか一つに記載のパンツ型吸収性物品。
<22>
前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、をさらに有し、
前記第1肌側シートと、前記第2肌側シートとが、それぞれ、複数のエンボスを含むスパンボンド不織布で構成され、
前記第1肌側シートにおける前記エンボスの面積率は、前記第2肌側シートにおける前記エンボスの面積率よりも高い
<1>から<21>のいずれか一つに記載のパンツ型吸収性物品。
<23>
前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、を有し、
前記第1肌側シートの融点は、前記第2肌側シートの融点よりも高い
<1>から<22>のいずれか一つに記載のパンツ型吸収性物品。
<24>
前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、を有し、
前記第1肌側シートの坪量は、前記第2肌側シートの坪量よりも低い
<1>から<23>のいずれか一つに記載のパンツ型吸収性物品。 Regarding the above-described embodiment, the present invention further discloses the following pants-type absorbent article.
<1>
a longitudinal direction extending from the abdomen of the wearer through the crotch to the dorsal side; and a lateral direction orthogonal to the longitudinal direction and corresponding to the lateral direction of the wearer;
An absorbent main body, and an outer covering composed of a plurality of laminated thermoplastic sheets, including an absorbent main body and a ventral region and a dorsal region disposed on the non-skin-facing side of the absorbent main body and positioned on both sides in the longitudinal direction. A pants-type absorbent article comprising a body and a pair of side joints that join the ventral region and the dorsal region of the outer body at the lateral side edges,
The pair of side joints are
a waist edge region within 25 mm in the longitudinal direction from the waist edge, which is the waist-side edge in the longitudinal direction;
a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction;
At least one of the pair of side joints,
a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have
Of the two laterally adjacent seal portions belonging to different seal rows, the laterally inner seal portion has a lower seal strength than the laterally outer seal portion. Goods.
<2>
Of the two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion located on the inner side in the lateral direction has a lower degree of melting of the fibers than the seal portion located on the outer side in the lateral direction <1> The pants-type absorbent article according to 1.
<3>
<1> or <, of two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion positioned on the inner side in the lateral direction is configured to be thicker than the seal portion positioned on the outer side in the lateral direction. 2>, the pants-type absorbent article.
<4>
Of the two seal portions that belong to different seal rows and are adjacent to each other in the lateral direction, the seal portion that is positioned on the inner side in the lateral direction has a smaller area than the seal portion that is positioned on the outer side in the lateral direction <1> to <3>, the underpants-type absorbent article.
<5>
When the outermost seal row in the lateral direction is the outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row,
The lateral distance between the laterally outer outer ends of the seal portions of the outer seal row and the laterally inner inner ends of the seal portions of the inner seal row is a first dimension. and
The outer seal row according to any one of <1> to <4>, wherein the plurality of seal portions are arranged in the longitudinal direction at intervals of a second dimension smaller than the first dimension. A pants-type absorbent article.
<6>
The underpants-type absorbent article according to any one of <1> to <5>, wherein the plurality of seal portions included in the plurality of seal rows are aligned along the lateral direction.
<7>
At least one of the waist end region and the leg end region including the plurality of seal rows is cut into a rectangular shape with a length of 10 mm in the vertical direction and a length including the full width of the side joint in the horizontal direction. A sample for measurement is formed, and the seal strength is measured by peeling the measurement sample from the inner side to the outer side in the lateral direction at a speed of 10 mm / min.
The underpants-type absorbent article according to any one of <1> to <6>, wherein a minimum strength between peak strengths corresponding to the plurality of seal rows is greater than 0N.
<8> three or more seal rows are arranged as the plurality of seal rows in at least one of the waist end region and the leg end region;
when the seal strength of at least one of the waist end region and the leg end region including the three or more seal rows is measured, three or more peak strengths corresponding to the three or more seal rows are measured;
The underpants-type absorbent article according to <7>, wherein the minimum intensity between the three or more peak intensities increases in the order measured from the inner side to the outer side in the lateral direction.
<9>
When the outermost seal row in the lateral direction is the outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row,
The ratio of the lateral dimension of the seal portion of the inner seal row to the lateral distance between the seal portion of the outer seal row and the seal portion of the inner seal row is preferably 0.2. The pants-type absorbent article according to any one of <1> to <8>, and more preferably 0.3 or more.
<10>
The pants according to any one of <1> to <9>, wherein the interval between the seal portions of the laterally adjacent seal rows is configured to decrease from the inner side to the outer side in the lateral direction. type absorbent article.
<11>
The underpants-type absorbent article according to any one of <1> to <10>, wherein a pitch of the plurality of seal rows in the horizontal direction is 4 mm or more.
<12>
The underpants-type absorbent article according to any one of <1> to <11>, wherein a pitch of the plurality of seal portions in the vertical direction is 1.5 mm or more and 5.0 mm or less.
<13>
The ventral region and the dorsal region, respectively,
A plurality of elastic members extending in the lateral direction are arranged and have a first stretchable region and a second stretchable region extending in the lateral direction from one to the other of the pair of side joints,
the first elastic region extends in the lateral direction from the waist end region;
the second stretchable region is adjacent to the first stretchable region in the longitudinal direction and extends in the lateral direction from a region of the side joints excluding the waist end region;
According to any one of <1> to <12>, the average elongation rate of the plurality of elastic members in the first elastic region is lower than the average elongation rate of the plurality of elastic members in the second elastic region. A pants-type absorbent article.
<14>
the ventral region and the dorsal region each have a plurality of elastic members extending in the lateral direction from one of the pair of side joints to the other;
The pitch of the plurality of elastic members in the longitudinal direction at the side joint portion is larger than the pitch of the plurality of seal portions in the longitudinal direction, and is an integral multiple of the pitch of the plurality of seal portions in the longitudinal direction. The pants-type absorbent article according to any one of <1> to <13>.
<15>
The side joints are
a first sealing area and a second sealing area each including a plurality of sealing portions each having a regular planar shape and arrangement, extending across the entire width of the side joint portion in the lateral direction and adjacent to the longitudinal direction;
a first laminated portion in which six or more thermoplastic sheets are laminated and at least a portion of which is arranged in the first seal region;
a second laminated portion in which the thermoplastic sheets are laminated in a number smaller than that of the first laminated portion, and at least a portion of which is arranged in the second seal region;
At least one of planar shape or arrangement of the plurality of seal portions differs between the first seal region and the second seal region,
The ratio of the total area of the plurality of seal portions included in the first seal region to the entire area of the first seal region is the ratio of the total area of the plurality of seal portions included in the second seal region to the entire area of the second seal region. The pants-type absorbent article according to any one of <1> to <14>.
<16>
In the first seal region, from the laterally inner inner end portion of the seal portion that is disposed most laterally inward, the laterally outer side of the seal portion that is disposed most laterally outward The dimension to the end is the distance from the laterally inner inner end of the laterally innermost seal portion to the laterally outermost seal portion in the second seal region. The underpants-type absorbent article according to <15>, which is smaller than the dimension to the laterally outer outer end.
<17>
The plurality of seal rows are arranged in the first seal area and the second seal area,
The pants-type absorbent article according to <15> or <16>, wherein the number of seal rows in the first seal region is smaller than the number of seal rows in the second seal region.
<18>
The underpants type according to any one of <15> to <17>, wherein the average area of the plurality of seal portions in the first seal region is smaller than the average area of the plurality of seal portions in the second seal region absorbent article.
<19> Any one of <15> to <18>, wherein the pitch in the lateral direction of the seal portions in the first seal region is wider than the pitch in the lateral direction of the seal portions in the second seal region The pants-type absorbent article according to 1.
<20>
<19> according to any one of <15> to <19>, wherein the pitch in the longitudinal direction of the seal portions in the first seal region is wider than the pitch in the longitudinal direction of the seal portions in the second seal region A pants-type absorbent article.
<21>
The underpants-type absorbent article according to any one of <15> to <20>, wherein the first seal region extends from the first laminated portion to a part of the second laminated portion.
<22>
The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet forming a skin-facing surface and having a smaller number of thermoplastic sheets laminated than the first laminated portion;
The first skin-side sheet and the second skin-side sheet are each composed of a spunbond nonwoven fabric containing a plurality of embossments,
The underpants-type absorbent article according to any one of <1> to <21>, wherein the embossed area ratio of the first skin-side sheet is higher than the embossed area ratio of the second skin-side sheet.
<23>
The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet that forms a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
The underpants-type absorbent article according to any one of <1> to <22>, wherein the melting point of the first skin-side sheet is higher than the melting point of the second skin-side sheet.
<24>
The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet that forms a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
The pants-type absorbent article according to any one of <1> to <23>, wherein the basis weight of the first skin-side sheet is lower than the basis weight of the second skin-side sheet.
1…パンツ型吸収性物品(使い捨ておむつ、おむつ)
4…吸収性本体
5…外装体
5a…腹側領域
5b…背側領域
50…熱可塑性シート
8…サイド接合部
8a…ウエスト端部
8b…レッグ端部
8c…ウエスト端部領域
8d…レッグ端部領域
S…シール部
SL…シール列 1 … Pants-type absorbent article (disposable diaper, diaper)
4Absorbent body 5 Exterior body 5a Abdominal region 5b Back region 50 Thermoplastic sheet 8 Side joint 8a Waist end 8b Leg end 8c Waist end region 8d Leg end Area S... Seal part SL... Seal row
4…吸収性本体
5…外装体
5a…腹側領域
5b…背側領域
50…熱可塑性シート
8…サイド接合部
8a…ウエスト端部
8b…レッグ端部
8c…ウエスト端部領域
8d…レッグ端部領域
S…シール部
SL…シール列 1 … Pants-type absorbent article (disposable diaper, diaper)
4
本発明のパンツ型吸収性物品によれば、着用動作時及び着用時の剥がれ防止と、廃棄時の引き裂き容易性とを両立させることが可能となる。
According to the underpants-type absorbent article of the present invention, it is possible to achieve both prevention of peeling during wearing and wearing, and ease of tearing during disposal.
Claims (24)
- 着用者の腹側から股間部を通って背側に延びる縦方向と、前記縦方向に直交し着用者の左右方向に対応する横方向と、を備え、かつ、
吸収性本体と、前記吸収性本体の非肌対向面側に配置され、前記縦方向の両側に位置する腹側領域及び背側領域を含み、複数の熱可塑性シートが積層されて構成された外装体と、前記外装体の前記腹側領域と前記背側領域とを前記横方向の側縁部において接合する一対のサイド接合部と、を備えるパンツ型吸収性物品であって、
前記一対のサイド接合部は、
前記縦方向におけるウエスト側の端部であるウエスト端部から前記縦方向に25mm以内のウエスト端部領域と、
前記縦方向におけるレッグ側の端部であるレッグ端部から前記縦方向に25mm以内のレッグ端部領域と、をそれぞれ有し、
前記一対のサイド接合部の少なくとも一方は、
前記縦方向に沿って離間して整列した複数のシール部でそれぞれ構成され、前記横方向に沿って前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方に配列された複数のシール列をさらに有し、
異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、低いシール強度を有する
パンツ型吸収性物品。 a longitudinal direction extending from the abdomen of the wearer through the crotch to the dorsal side; and a lateral direction orthogonal to the longitudinal direction and corresponding to the lateral direction of the wearer;
An absorbent main body, and an outer covering composed of a plurality of laminated thermoplastic sheets, including an absorbent main body and a ventral region and a dorsal region disposed on the non-skin-facing side of the absorbent main body and positioned on both sides in the longitudinal direction. A pants-type absorbent article comprising a body and a pair of side joints that join the ventral region and the dorsal region of the outer body at the lateral side edges,
The pair of side joints are
a waist edge region within 25 mm in the longitudinal direction from the waist edge, which is the waist-side edge in the longitudinal direction;
a leg end region within 25 mm in the longitudinal direction from the leg end, which is the leg-side end in the longitudinal direction;
At least one of the pair of side joints,
a plurality of seal rows arranged in at least one of the waist end region and the leg end region along the transverse direction, each of which is composed of a plurality of seal portions spaced apart and aligned along the longitudinal direction; have
Of the two laterally adjacent seal portions belonging to different seal rows, the laterally inner seal portion has a lower seal strength than the laterally outer seal portion. Goods. - 異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、繊維の溶融度合いが低い
請求項1に記載のパンツ型吸収性物品。 1. Of the two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion located on the inner side in the lateral direction has a lower degree of melting of fibers than the seal portion located on the outer side in the lateral direction. The pants-type absorbent article according to 1. - 異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、厚く構成される
請求項1又は2に記載のパンツ型吸収性物品。 3. Of the two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion located on the inner side in the lateral direction is configured to be thicker than the seal portion located on the outer side in the lateral direction. The pants-type absorbent article according to 1. - 異なるシール列に属し前記横方向に隣り合う2つのシール部のうち、前記横方向内側に位置するシール部は、前記横方向外側に位置するシール部よりも、小さな面積を有する
請求項1から3のいずれか一項に記載のパンツ型吸収性物品。 4. Of the two seal portions belonging to different seal rows and adjacent to each other in the lateral direction, the seal portion located on the inner side in the lateral direction has a smaller area than the seal portion located on the outer side in the lateral direction. The pants-type absorbent article according to any one of . - 前記横方向において最も外側に位置するシール列を外側シール列、前記外側シール列と前記横方向内側に隣り合うシール列を内側シール列とした場合に、
前記外側シール列の前記シール部の前記横方向外側の外端部と、前記内側シール列の前記シール部の前記横方向内側の内端部との間の前記横方向における距離は、第1寸法であり、
前記外側シール列では、前記複数のシール部が前記縦方向に前記第1寸法よりも小さい第2寸法の間隔をあけて配置されている
請求項1から4のいずれか一項に記載のパンツ型吸収性物品。 When the outermost seal row in the lateral direction is the outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row,
The lateral distance between the laterally outer outer ends of the seal portions of the outer seal row and the laterally inner inner ends of the seal portions of the inner seal row is a first dimension. and
The underpants type according to any one of claims 1 to 4, wherein in the row of outer seals, the plurality of seal portions are arranged in the longitudinal direction at intervals of a second dimension smaller than the first dimension. absorbent article. - 前記複数のシール列に含まれる複数のシール部は、前記横方向に沿って整列している
請求項1から5のいずれか一項に記載のパンツ型吸収性物品。 The underpants-type absorbent article according to any one of claims 1 to 5, wherein the plurality of seal portions included in the plurality of seal rows are aligned along the lateral direction. - 前記複数のシール列を含む前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方を、前記縦方向に10mm、前記横方向に前記サイド接合部の全幅を含む長さの長方形状に切り出して測定用サンプルを形成し、前記測定用サンプルを前記横方向内側から外側に向かって10mm/minの速さで剥離させてシール強度を測定した場合、
前記複数のシール列に対応するピーク強度間の最小強度が、0Nよりも大きくなる
請求項1から6のいずれか一項に記載のパンツ型吸収性物品。 At least one of the waist end region and the leg end region including the plurality of seal rows is cut into a rectangular shape with a length of 10 mm in the vertical direction and a length including the full width of the side joint in the horizontal direction. A sample for measurement is formed, and the seal strength is measured by peeling the measurement sample from the inner side to the outer side in the lateral direction at a speed of 10 mm / min.
The pants-type absorbent article according to any one of claims 1 to 6, wherein the minimum strength between peak strengths corresponding to the plurality of seal rows is greater than 0N. - 前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方には、前記複数のシール列として3以上のシール列が配置されており、
前記3以上のシール列を含む前記ウエスト端部領域又は前記レッグ端部領域の少なくとも一方のシール強度を測定した場合に、前記3以上のシール列にそれぞれ対応する3以上のピーク強度が測定され、
前記3以上のピーク強度間の最小強度は、前記横方向内側から外側に向かって測定される順に増加する
請求項7に記載のパンツ型吸収性物品。 three or more seal rows are arranged as the plurality of seal rows in at least one of the waist end region and the leg end region;
when the seal strength of at least one of the waist end region and the leg end region including the three or more seal rows is measured, three or more peak strengths corresponding to the three or more seal rows are measured;
8. The pants-type absorbent article according to claim 7, wherein the minimum intensity between the three or more peak intensities increases in the order measured from the inner side to the outer side in the lateral direction. - 前記横方向において最も外側に位置するシール列を外側シール列、前記外側シール列と前記横方向内側に隣り合うシール列を内側シール列とした場合に、
前記外側シール列の前記シール部と、前記内側シール列の前記シール部との前記横方向における間隔に対する、前記内側シール列の前記シール部の前記横方向における寸法の比率は、0.2以上である
請求項1から8のいずれか一項に記載のパンツ型吸収性物品。 When the outermost seal row in the lateral direction is the outer seal row, and the seal row adjacent to the outer seal row on the inner side in the lateral direction is the inner seal row,
The ratio of the lateral dimension of the seal portion of the inner seal row to the lateral distance between the seal portion of the outer seal row and the seal portion of the inner seal row is 0.2 or more. The pants-type absorbent article according to any one of claims 1 to 8. - 前記横方向に隣り合う前記シール列の前記シール部の間隔は、前記横方向内側から外側に向かって、減少するように構成される
請求項1から9のいずれか一項に記載のパンツ型吸収性物品。 10. The pants-type absorbent according to any one of claims 1 to 9, wherein the interval between the seal portions of the seal rows adjacent in the lateral direction is configured to decrease from the inner side to the outer side in the lateral direction. sexual goods. - 前前記複数のシール列の前記横方向におけるピッチは、4mm以上である
請求項1から10のいずれか一項に記載のパンツ型吸収性物品。 The pants-type absorbent article according to any one of claims 1 to 10, wherein the pitch of the plurality of front seal rows in the lateral direction is 4 mm or more. - 前記複数のシール部の前記縦方向におけるピッチは、1.5mm以上5.0mm以下である
請求項1から11のいずれか一項に記載のパンツ型吸収性物品。 The underpants-type absorbent article according to any one of claims 1 to 11, wherein the pitch of the plurality of seal portions in the longitudinal direction is 1.5 mm or more and 5.0 mm or less. - 前記腹側領域及び前記背側領域は、それぞれ、
前記横方向に延びる複数の弾性部材が配置され、前記一対のサイド接合部の一方から他方まで前記横方向に延びる第1伸縮領域及び第2伸縮領域を有し、
前記第1伸縮領域は、前記ウエスト端部領域から前記横方向に延び、
前記第2伸縮領域は、前記第1伸縮領域と前記縦方向に隣接し、前記サイド接合部の前記ウエスト端部領域を除く領域から前記横方向に延び、
前記第1伸縮領域における前記複数の弾性部材の平均伸張率は、前記第2伸縮領域における前記複数の弾性部材の平均伸張率よりも低い
請求項1から12のいずれか一項に記載のパンツ型吸収性物品。 The ventral region and the dorsal region, respectively,
A plurality of elastic members extending in the lateral direction are arranged and have a first stretchable region and a second stretchable region extending in the lateral direction from one to the other of the pair of side joints,
the first elastic region extends in the lateral direction from the waist end region;
the second stretchable region is adjacent to the first stretchable region in the longitudinal direction and extends in the lateral direction from a region of the side joints excluding the waist end region;
The underpants type according to any one of claims 1 to 12, wherein the average elongation rate of the plurality of elastic members in the first elastic region is lower than the average elongation rate of the plurality of elastic members in the second elastic region. absorbent article. - 前記腹側領域及び前記背側領域は、それぞれ、前記一対のサイド接合部の一方から他方まで前記横方向に延びる複数の弾性部材を有し、
前記サイド接合部における前記複数の弾性部材の前記縦方向におけるピッチは、前記複数のシール部の前記縦方向におけるピッチよりも大きく、かつ、前記複数のシール部の前記縦方向におけるピッチの整数倍ではない
請求項1から13のいずれか一項に記載のパンツ型吸収性物品。 the ventral region and the dorsal region each have a plurality of elastic members extending in the lateral direction from one of the pair of side joints to the other;
The pitch of the plurality of elastic members in the longitudinal direction at the side joint portion is larger than the pitch of the plurality of seal portions in the longitudinal direction, and is an integral multiple of the pitch of the plurality of seal portions in the longitudinal direction. The pants-type absorbent article according to any one of claims 1 to 13. - 前記サイド接合部は、
規則的な平面形状及び配置を有する複数のシール部をそれぞれ含み、前記横方向において前記サイド接合部の全幅にわたって延び、かつ、前記縦方向に隣接した第1シール領域及び第2シール領域と、
6以上の前記熱可塑性シートが積層され、前記第1シール領域に少なくとも一部が配置された第1積層部と、
前記第1積層部よりも少ない数の前記熱可塑性シートが積層され、前記第2シール領域に少なくとも一部が配置された第2積層部と、を有し、
前記第1シール領域及び前記第2シール領域では、前記複数のシール部の平面形状又は配置の少なくとも一方が異なり、
前記第1シール領域の全体の面積に対する、前記第1シール領域に含まれる複数のシール部の合計面積の割合は、前記第2シール領域の全体の面積に対する、前記第2シール領域に含まれる複数のシール部の合計面積の割合よりも小さい
請求項1から14のいずれか一項に記載のパンツ型吸収性物品。 The side joints are
a first sealing area and a second sealing area each including a plurality of sealing portions each having a regular planar shape and arrangement, extending across the entire width of the side joint portion in the lateral direction and adjacent to the longitudinal direction;
a first laminated portion in which six or more thermoplastic sheets are laminated and at least a portion of which is arranged in the first seal region;
a second laminated portion in which the thermoplastic sheets are laminated in a number smaller than that of the first laminated portion, and at least a portion of which is arranged in the second seal region;
At least one of planar shape or arrangement of the plurality of seal portions differs between the first seal region and the second seal region,
The ratio of the total area of the plurality of seal portions included in the first seal region to the entire area of the first seal region is the ratio of the total area of the plurality of seal portions included in the second seal region to the entire area of the second seal region. 15. The pants-type absorbent article according to any one of claims 1 to 14, which is smaller than the ratio of the total area of the seal portions. - 前記第1シール領域における、最も前記横方向内側に配置された前記シール部の前記横方向内側の内端部から、最も前記横方向外側に配置された前記シール部の前記横方向外側の前記外端部までの寸法は、前記第2シール領域における、最も前記横方向内側に配置された前記シール部の前記横方向内側の内端部から、最も前記横方向外側に配置された前記シール部の前記横方向外側の外端部までの寸法よりも小さい
請求項15に記載のパンツ型吸収性物品。 In the first seal area, from the laterally inner inner end portion of the seal portion that is disposed most laterally inward, the laterally outer side of the seal portion that is disposed most laterally outward The dimension to the end is the distance from the laterally inner inner end of the laterally innermost seal portion to the laterally outermost seal portion in the second seal region. 16. The pants-type absorbent article according to claim 15, wherein the dimension is smaller than the dimension to the outer edge of the laterally outer side. - 前記複数のシール列は、前記第1シール領域及び前記第2シール領域に配置されており、
前記第1シール領域のシール列の数は、前記第2シール領域のシール列の数よりも少ない
請求項15又は16に記載のパンツ型吸収性物品。 The plurality of seal rows are arranged in the first seal area and the second seal area,
The pants-type absorbent article according to claim 15 or 16, wherein the number of seal rows in the first seal area is smaller than the number of seal rows in the second seal area. - 前記第1シール領域の前記複数のシール部の平均面積は、前記第2シール領域の前記複数のシール部の平均面積よりも小さい
請求項15から17のいずれか一項に記載のパンツ型吸収性物品。 The pants-type absorbent according to any one of claims 15 to 17, wherein the average area of the plurality of seal portions in the first seal region is smaller than the average area of the plurality of seal portions in the second seal region. Goods. - 前記第1シール領域の前記シール部の前記横方向におけるピッチは、前記第2シール領域の前記シール部の前記横方向におけるピッチよりも広い
請求項15から18のいずれか一項に記載のパンツ型吸収性物品。 The pants type according to any one of claims 15 to 18, wherein the pitch in the lateral direction of the seal portions of the first seal region is wider than the pitch in the lateral direction of the seal portions of the second seal region. absorbent article. - 前記第1シール領域の前記シール部の前記横方向におけるピッチは、前記第2シール領域の前記シール部の前記横方向におけるピッチよりも広い
請求項15から19のいずれか一項に記載のパンツ型吸収性物品。 The pants type according to any one of claims 15 to 19, wherein the pitch in the lateral direction of the seal portions of the first seal region is wider than the pitch in the lateral direction of the seal portions of the second seal region. absorbent article. - 前記第1シール領域は、前記第1積層部から前記第2積層部の一部に延出している
請求項15から20のいずれか一項に記載のパンツ型吸収性物品。 21. The pants-type absorbent article according to any one of claims 15 to 20, wherein the first seal region extends from the first laminated portion to part of the second laminated portion. - 前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、をさらに有し、
前記第1肌側シートと、前記第2肌側シートとが、それぞれ、複数のエンボスを含むスパンボンド不織布で構成され、
前記第1肌側シートにおける前記エンボスの面積率は、前記第2肌側シートにおける前記エンボスの面積率よりも高い
請求項1から21のいずれか一項に記載のパンツ型吸収性物品。 The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet forming a skin-facing surface and having a smaller number of thermoplastic sheets laminated than the first laminated portion;
The first skin-side sheet and the second skin-side sheet are each composed of a spunbond nonwoven fabric containing a plurality of embossments,
The underpants-type absorbent article according to any one of claims 1 to 21, wherein the embossed area ratio of the first skin-side sheet is higher than the embossed area ratio of the second skin-side sheet. - 前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、を有し、
前記第1肌側シートの融点は、前記第2肌側シートの融点よりも高い
請求項1から22のいずれか一項に記載のパンツ型吸収性物品。 The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet forming a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
The pants-type absorbent article according to any one of claims 1 to 22, wherein the melting point of the first skin-side sheet is higher than the melting point of the second skin-side sheet. - 前記サイド接合部は、
肌対向面を構成する第1肌側シートを含む6以上の前記熱可塑性シートが積層された第1積層部と、
肌対向面を構成する第2肌側シートを含む、前記第1積層部よりも少ない数の前記熱可塑性シートが積層された第2積層部と、を有し、
前記第1肌側シートの坪量は、前記第2肌側シートの坪量よりも低い
請求項1から23のいずれか一項に記載のパンツ型吸収性物品。 The side joints are
a first laminated portion in which six or more thermoplastic sheets including a first skin-side sheet constituting a skin-facing surface are laminated;
a second laminated portion including a second skin-side sheet forming a skin-facing surface, and a second laminated portion in which a smaller number of the thermoplastic sheets than the first laminated portion are laminated;
The pants-type absorbent article according to any one of claims 1 to 23, wherein the basis weight of the first skin-side sheet is lower than the basis weight of the second skin-side sheet.
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JP2011510690A (en) * | 2007-12-20 | 2011-04-07 | エスセーアー・ハイジーン・プロダクツ・アーベー | Seams joining two or more web materials |
JP2011072577A (en) * | 2009-09-30 | 2011-04-14 | Daio Paper Corp | Absorptive article |
JP2011120626A (en) * | 2009-12-08 | 2011-06-23 | Kao Corp | Pants type absorbent article |
JP2017131451A (en) * | 2016-01-28 | 2017-08-03 | 大王製紙株式会社 | Underpants type disposable diaper |
WO2019123549A1 (en) * | 2017-12-19 | 2019-06-27 | 花王株式会社 | Pants-type wearable article |
JP2019141234A (en) * | 2018-02-19 | 2019-08-29 | 株式会社リブドゥコーポレーション | Disposable absorbent article |
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- 2022-12-02 WO PCT/JP2022/044566 patent/WO2023127399A1/en active Application Filing
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JP2011510690A (en) * | 2007-12-20 | 2011-04-07 | エスセーアー・ハイジーン・プロダクツ・アーベー | Seams joining two or more web materials |
JP2011072577A (en) * | 2009-09-30 | 2011-04-14 | Daio Paper Corp | Absorptive article |
JP2011120626A (en) * | 2009-12-08 | 2011-06-23 | Kao Corp | Pants type absorbent article |
JP2017131451A (en) * | 2016-01-28 | 2017-08-03 | 大王製紙株式会社 | Underpants type disposable diaper |
WO2019123549A1 (en) * | 2017-12-19 | 2019-06-27 | 花王株式会社 | Pants-type wearable article |
JP2019141234A (en) * | 2018-02-19 | 2019-08-29 | 株式会社リブドゥコーポレーション | Disposable absorbent article |
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