CN107847376B - Absorbent article - Google Patents
Absorbent article Download PDFInfo
- Publication number
- CN107847376B CN107847376B CN201680036987.XA CN201680036987A CN107847376B CN 107847376 B CN107847376 B CN 107847376B CN 201680036987 A CN201680036987 A CN 201680036987A CN 107847376 B CN107847376 B CN 107847376B
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- Prior art keywords
- longitudinal direction
- groove
- absorbent
- absorbent article
- groove portion
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- 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
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- 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
- A61F13/53—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 absorbing medium
- A61F13/531—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 absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/533—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
Abstract
The present invention is an absorbent article provided with a liquid-absorbent body (11) and having a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other, the absorbent body (11) having: a first groove section (121) which is formed along the longitudinal direction and includes an absorbent body (11) bent in the thickness direction; and a plurality of second groove sections (122) that are arranged in the longitudinal direction and are formed so as to intersect a straight line that passes through the center in the width direction of the first groove section (121) and that runs along the longitudinal direction. In the case where the absorber (11) is in a planar state, a second groove portion (122) arranged on the rearmost side in the longitudinal direction among the plurality of second groove portions (122) is spaced apart from the rear end portion in the longitudinal direction of the first groove portion (121).
Description
Technical Field
The present invention relates to an absorbent article.
Background
An absorbent article including an absorbent body having liquid absorbency such as an absorbent pad for a disposable diaper is known. In such an absorbent article, by providing the groove portions by embossing or the like in the absorbent body having relatively high rigidity, and the absorbent body is easily bent along the groove portions, it is possible to improve the fit when the absorbent article is worn. For example, patent document 1 discloses an absorbent article in which groove portions extending back and forth in the longitudinal direction of an absorbent body are formed, and the absorbent body is deformed into a shape folded in two in the longitudinal direction so as to be easily positioned in a gap in the crotch of a wearer.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2014-195529
Disclosure of Invention
Problems to be solved by the invention
However, the human body shape is complicated, and if the absorber is improperly deformed, the fit may be deteriorated while the absorbent article is worn. For example, in patent document 1, the entire absorber is deformed by being folded in half in the longitudinal direction. Therefore, the three-dimensional shape of the absorber does not conform to the planar portions of the ventral and dorsal sides of the human body, which may cause discomfort and/or discomfort to the wearer.
The present invention has been made in view of the above problems, and an object of the present invention is to provide an absorbent article which can achieve good fit when worn.
Means for solving the problems
A principal aspect of the present invention is an absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other, the absorbent article including an absorbent body having liquid absorbency, the absorbent body including: a first groove portion formed along the longitudinal direction, the first groove portion being configured to guide the absorbent body to flex in the thickness direction; and a plurality of second groove portions formed so as to intersect with a straight line passing through a center in the width direction of the first groove portion and along the longitudinal direction, the plurality of second groove portions being aligned in the longitudinal direction, a second groove portion arranged on a rearmost side in the longitudinal direction among the plurality of second groove portions being spaced apart from a rear end portion in the longitudinal direction of the first groove portion when the absorbent body is in a planar state.
Other features of the present invention will become apparent from the present specification and from the accompanying drawings.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, an absorbent article that can achieve good fit when worn can be provided.
Drawings
Fig. 1 is a schematic perspective view showing the appearance of a diaper 1.
Fig. 2A is a plan view showing the diaper 1 in an extended state in the longitudinal direction. Fig. 2B is a schematic cross-sectional view taken along line a-a of fig. 2A.
Fig. 3A is an developed plan view showing a developed state of the diaper 1 in a state of being elongated in the longitudinal direction in the middle of the manufacturing process. Fig. 3B is a schematic cross-sectional view taken along line B-B of fig. 3A.
Fig. 4 is a diagram showing one example of the manufacturing step of the diaper 1.
Fig. 5 is a plan view showing a detail of the absorber 11.
Fig. 6A and 6B are diagrams showing a deformed state of the absorbent body 11 when the diaper 1 is worn.
Fig. 7 is a schematic plan view showing the pants-type diaper 1 when viewed from the rear side (back side).
Fig. 8 is a plan view showing an unfolded state of a three-piece disposable diaper (diaper 2) as one example of an absorbent article.
Fig. 9 is a plan view showing a sanitary napkin (a sanitary napkin 3) as an example of an absorbent article.
Detailed Description
At least the following matters will become clear from the description of the present specification with reference to the accompanying drawings.
An absorbent article having a longitudinal direction, a width direction, and a thickness direction orthogonal to each other, the absorbent article including an absorbent body having liquid absorbency, the absorbent body including: a first groove portion formed along the longitudinal direction, the first groove portion being configured to guide the absorbent body to flex in the thickness direction; and a plurality of second groove portions formed so as to intersect with a straight line passing through a center in the width direction of the first groove portion and along the longitudinal direction, the plurality of second groove portions being aligned in the longitudinal direction, a second groove portion arranged on a rearmost side in the longitudinal direction among the plurality of second groove portions being spaced apart from a rear end portion in the longitudinal direction of the first groove portion when the absorbent body is in a planar state.
According to such an absorbent article, in the region where the first groove portion is formed near the center portion in the longitudinal direction, the absorbent body is deformed in a mountain shape (chevron shape) protruding toward the skin side corresponding to the body shape of the wearer, and in the region where the second groove portion is formed on the rear side in the longitudinal direction, the absorbent body easily maintains a substantially planar shape corresponding to the body shape of the wearer without being deformed in the mountain shape. Therefore, good fit can be achieved when the absorbent article is worn.
In such an absorbent article, it is desirable that the absorbent article further includes: a main body section having the absorber; and a stretchable belt portion, wherein the absorbent article is formed with a waist opening portion and a pair of leg opening portions.
According to such an absorbent article, when the diaper-type absorbent article is worn, the three-dimensional shape of the absorbent body is easily conformed to the shape of the human body by appropriately deforming the absorbent body in each of the back-side region, the central region, and the abdominal-side region. This can provide a good fit for the wearer.
In such an absorbent article, it is desirable that the absorbent article further has a longitudinal direction, the absorber and the main body portion are folded in half at a predetermined position in the longitudinal direction with the longitudinal direction being arranged along the longitudinal direction, one end side and the other end side of the body portion in the longitudinal direction are connected via the belt portion, at least a part of the waist opening portion is formed by an end edge of the belt portion on the upper side in the longitudinal direction, the pair of leg opening portions are formed by an end edge on a lower side in the longitudinal direction of the band portion and both end edges in the width direction of the body portion to form a joint portion, the joining portions are inclined in the longitudinal direction from the waistline opening portion toward the leg opening portions to the outside in the width direction, respectively, and join at least the main body portion and the belt portion together.
According to such an absorbent article, when the diaper-type absorbent article is worn, the fit of the absorbent body can be improved and the degree of swelling or the like of the absorbent body can be minimized during wearing. This enables the appearance of the absorbent article to be tailored like an undergarment, such as a pair of pants or briefs.
In such an absorbent article, it is desirable that the first groove portions are formed so as to compress the absorbent body from the non-skin side in the thickness direction.
According to such an absorbent article, the absorbent body is easily folded toward the skin side in the thickness direction along the first groove portions. Therefore, the absorbent body is deformed into a mountain shape protruding toward the skin side, and the deformed portion is easily brought into contact with the groove of the hip of the wearer. This can improve the fit when the absorbent body is worn.
In such an absorbent article, it is desirable that the second groove portion is arranged so as to extend from the front side toward the rear side in the longitudinal direction, to the outside in the width direction.
According to such an absorbent article, the second groove portion is arranged to extend rearward in the longitudinal direction in a parabolic manner, resulting in that the force transmitted from the first groove portion easily acts to the outside in the width direction via the second groove portion. Therefore, the absorber can be easily widened outward in the width direction and can be maintained in a substantially planar shape in the region on the rear side in the longitudinal direction, and the fit on the back side of the wearer can be improved. This therefore reduces wearer discomfort and discomfort.
In such an absorbent article, it is desirable that the second groove portion is arranged to extend from the front side toward the rear side in the longitudinal direction to the outside in the width direction, and a smaller angle of angles between an extension line obtained by extending the second groove portion to the rear side in the longitudinal direction to the outside in the width direction and the engaging portion provided on the rear side is 70 ° or more.
According to such an absorbent article, even when the absorbent article is worn, the tension applied to the outside in the width direction by the stretchable belt portion can act on the absorbent body through the joint portion. That is, the tensions acting in the direction orthogonal to the joint portion and the direction along the second groove portion can be easily aligned. Thus, tension is effectively applied to the absorbent body. Therefore, the absorber is easily kept in a flat shape by being pulled outward in the width direction, so that the attachment property can be further improved.
In such an absorbent article, it is desirable that the plurality of third groove portions are formed so as to intersect the first groove portions and so as to be positioned on the front side in the longitudinal direction with respect to the second groove portions.
According to such an absorbent article, in the region where the third groove portions are provided, the surface shape (curved surface shape) of the absorbent body can be easily maintained, and therefore generation of wrinkles and/or wedging into the buttocks of the wearer are suppressed. Further, the absorber can be easily formed into a curved shape along the parabola of the third groove portion, and can be easily fitted to the roundness of the buttocks of the wearer.
In such an absorbent article, it is desirable that a rear end portion in the longitudinal direction of the first groove portion is disposed at a position of an intersection between the first groove portion and the second groove portion disposed most frontward in the longitudinal direction.
According to such an absorbent article, the absorbent body is easily deformed into a mountain shape on the front side (central region) with respect to the rear end portion in the longitudinal direction of the first groove portion, and the absorbent body is easily kept flat on the rear side (back region). That is, the deformation of the absorbent body can be easily controlled in the central region and the back region. Therefore, good conformability can be achieved not only in the central region but also in the back-side region.
In such an absorbent article, it is desirable that the absorbent body has a narrow portion whose distance in the width direction is narrow in a region between a front side end and a rear side end in the length direction of the absorbent body, and that a front side end in the length direction of the first groove portion is arranged between a position where the distance in the width direction of the narrow portion is narrowest in the length direction and a position of a front side end in the length direction of the narrow portion.
According to such an absorbent article, in the front abdominal region with respect to the front end in the longitudinal direction of the first groove portion, the portion of the absorbent body sandwiched between the legs of the wearer is small. Thus, the absorber is not easily deformed into a mountain shape. Therefore, in the abdomen-side region, the absorber is easily maintained in a curved shape along the abdomen of the body. This can easily achieve good fit not only in the central region but also in the ventral region.
In such an absorbent article, it is desirable that the first groove portion and the second groove portion are each formed in such a manner as to compress the absorbent body, and the density of the absorbent body at the first groove portion is greater than the density of the absorbent body at the second groove portion.
According to such an absorbent article, the absorbent body is more easily folded at the first groove portions having a high density than at the second groove portions having a low density. Therefore, the absorbent body is easily preferentially deformed into a mountain shape along the first groove portions, and is easily attached to the body of the wearer.
Embodiments of the present invention are described in detail below with reference to the accompanying drawings
< basic Structure of absorbent article >
A pants-type disposable diaper 1 (hereinafter, also referred to as "diaper 1") will be explained as an example of the absorbent article according to the embodiment of the present invention. It should be noted that the absorbent article according to the embodiment of the present invention is not limited to a disposable diaper.
Fig. 1 is a schematic perspective view showing the appearance of a diaper 1. The diaper 1 includes an absorbent main body 10 (main body portion), leg gathers 20, and belt portions 30, and has a pants-type shape as shown in fig. 1 when the diaper 1 is worn. In the pant-type state in fig. 1, the diaper 1 has a "longitudinal direction" and a "transverse direction" which are orthogonal to each other. Then, a waist opening HB is formed at the upper side in the longitudinal direction of the diaper 1, and a pair of leg openings HL is formed at both sides in the lateral direction of the diaper 1. Further, when the diaper is worn, the front side of the diaper 1 covers the abdominal side of the wearer, while the rear side of the diaper 1 covers the back side of the wearer.
Fig. 2A is a plan view showing the diaper 1 in a state of being elongated in the longitudinal direction of the absorbent main body 10. Fig. 2B is a schematic cross-sectional view taken along line a-a of fig. 2A. Fig. 3A is an developed plan view showing a developed state of the diaper 1 in a state of being elongated in the longitudinal direction of the absorbent main body 10 in the middle of the manufacturing process. Fig. 3B is a schematic cross-sectional view taken along line B-B of fig. 3A.
At the end of the manufacturing process, the diaper 1 is in the flat state shown in figure 2A. The process of manufacturing the diaper 1 will be explained later with reference to fig. 4. The diaper 1 in a flat state has three mutually orthogonal directions "longitudinal direction", "width direction", and "thickness direction". The longitudinal direction of the diaper 1 in a flat state is a direction along the longitudinal direction of the absorbent main body 10. The longitudinal direction corresponds to the longitudinal direction in the pants-type state in fig. 1. However, in a strict sense, the longitudinal direction in the pants-type state and the longitudinal direction in the flat state are slightly different in meaning. Therefore, when necessary, for example, two directions of "longitudinal direction in a pants-type state" and "longitudinal direction in a flat state" are distinguished. It should be noted that the state in which the diaper 1 is elongated in the longitudinal direction in fig. 2A (i.e., the flat state) refers to the following state: in this state, the diaper 1 is elongated in the longitudinal direction against the contraction force exerted by the leg gather elastic member 23 and the belt elastic member 33 described later to such an extent that the gathers and the gathers become substantially invisible in the portion where the elastic member is arranged. Further, the shape of the diaper 1 when stretched in the longitudinal direction is the same as the shape of the diaper 1 when stretched flat without receiving a contractive force by various elastic members such as the leg gather elastic member 23.
In the following description, the front side (ventral side) in the longitudinal direction refers to a side corresponding to the ventral side of the wearer when the absorbent main body 10 is elongated in the longitudinal direction, and the rear side (dorsal side) in the longitudinal direction refers to a side corresponding to the dorsal side of the wearer. The width direction of the diaper 1 in the flat state is conceptually the same as the lateral direction of the diaper 1 in the pants-type state in fig. 1. The thickness direction of the diaper 1 in a flat state is a direction orthogonal to the longitudinal direction and the width direction, and the side to be contacted by the skin of the wearer is referred to as "skin side" and the opposite side is referred to as "non-skin side".
As shown in fig. 2A and 2B, in the diaper 1 in a flat state, the absorbent main body 10 (main body portion) is arranged along the longitudinal direction, and a pair of leg gather portions 20 are provided on both sides of the absorbent main body 10 in the width direction. Then, the pair of belt portions 30 are each arranged so as to overlap with a part of the absorbent main body 10 and each leg gather portion 20 on the skin side in the thickness direction. As shown in fig. 3A, in the diaper 1 according to the embodiment of the present invention, each leg gather portion 20 and each belt portion 30 are formed using the side sheet 40 which is a single sheet member. The leg gather portion 20 and the belt portion 30 are formed by folding back the side sheet 40 inward in the width direction at a fold line FL extending in the longitudinal direction.
The leg gather portion 20 is provided with a leg gather cut portion 25 obtained by cutting out a part of the outer side end portion 20eo (fold line FL) in the width direction. Likewise, the belt portion 30 is provided with a belt cut portion 35 obtained by cutting out a part of the outer side end portion 30eo (the fold line FL) in the width direction. The leg opening HL is formed by the leg gather cut portion 25 and the tape cut portion 35.
The belt portion 30 is joined to the absorbent main body 10 (strictly speaking, the topsheet 13 provided on the skin side of the absorbent main body 10) and the leg gather portions 20 by a pair of first joining portions WL1 that are inclined from the front end portion 10ef in the longitudinal direction of the absorbent main body 10 toward the leg opening portions HL. Similarly, the belt portion 30 is joined to the absorbent main body 10 and the leg gather portions 20 by a pair of second joining portions WL2 that are inclined from the rear end portion 10er in the longitudinal direction of the absorbent main body 10 toward the leg opening portions HL. In the first joining portion WL1 and the second joining portion WL2, joining is performed by a known welding method such as heat-melt bonding (hot-melt bonding) or ultrasonic welding (ultrasonic welding), but joining may be performed using an adhesive such as hot-melt adhesive (hot-melt adhesive).
The diaper 1 in such a flat state is folded in half at the vicinity of the center position CL in the longitudinal direction of the absorbent main body 10 while the inner ends 30ei and 30ei in the width direction of the pair of belt portions 30 and 30 are opened to both sides in the width direction. This brings the diaper 1 in a flat state into a wearable state (refer to fig. 1) like a pants-type diaper 1 configured such that one end portion and the other end portion in the longitudinal direction of the absorbent main body 10 are connected via the belt portions 30, 30. At this time, the waistline opening HB is formed by the front end 10ef in the longitudinal direction of the absorbent main body 10, the rear end 10er in the longitudinal direction of the absorbent main body 10, and the inner end 30ei of the pair of belt portions 30.
As shown in fig. 2A, the absorbent main body 10 is a sheet-like member having a tapered shape in a substantially V-shape in a plan view at both end portions in the longitudinal direction thereof by cutting a substantially rectangular member (see fig. 3A) extending in the longitudinal direction along the first joining portion WL1 and the second joining portion WL 2. The absorbent main body 10 includes an absorbent body 11, a front sheet 13 (corresponding to a skin side sheet), and a back sheet 15 (corresponding to a non-skin side sheet), wherein the front sheet 13 is disposed so as to cover the absorbent body 11 from the skin side, and the back sheet 15 is disposed so as to cover the absorbent body 11 from the non-skin side. These members 13, 11, and 15 are joined to members adjacent in the thickness direction using a hot melt adhesive or the like (see fig. 2B and 3B). Note that the coating pattern of the adhesive is, for example, an Ω -shaped pattern, a spiral pattern, and a stripe pattern, which also applies to the case of other adhesives described later.
The absorbent body 11 includes an absorbent core obtained by forming a predetermined liquid absorbent material into a predetermined shape (for example, a substantially hourglass shape in plan view) and a core wrap sheet covering an outer peripheral surface of the absorbent core, and the absorbent body 11 is a member that absorbs excreted liquid such as urine when the diaper 1 is worn. Such liquid-absorbent materials are, for example, liquid-absorbent fibers such as pulp fibers or liquid-absorbent particles such as superabsorbent polymers (so-called SAP). Liquid-permeable sheets such as tissue paper and nonwoven fabric can be used as the core wrap sheet.
In the embodiment according to the present invention, as shown in fig. 2A and 3A, a plurality of groove portions 12 are provided on the surface of the absorbent body 11. These groove portions 12 have a function of deforming the absorbent body 11 in accordance with the shape of the wearer's body when the diaper 1 is worn, so that the absorbent main body 10 is easily fitted to the wearer's body. Details of the absorbent body 11 and the groove portion 12 will be described later.
The front sheet 13 is formed using a liquid-permeable flexible sheet member, and a sheet member such as a breathable nonwoven fabric, for example, can also be used. The topsheet 13 has a planar dimension extending beyond both sides in the longitudinal direction and both sides in the width direction of the absorbent body 11.
As shown in fig. 3B, the back sheet 15 is formed by laminating and joining two sheet members, namely, a leakage preventing sheet 15f and an exterior sheet 15n in the thickness direction. The leakage-preventing sheet 15f is a liquid-impermeable sheet member made of a Polyethylene (PE) film, a polypropylene (PP) film, or the like, and the leakage-preventing sheet 15f is disposed on the skin side in the thickness direction of the back sheet 15. The exterior sheet 15n is a sheet member made of nonwoven fabric or the like, and the exterior sheet 15n is disposed on the non-skin side in the thickness direction of the back sheet 15 and constitutes the exterior of the absorbent main body 10. However, the back sheet 15 is not limited to the above configuration as long as it has a predetermined leakage-preventing property. The back sheet 15 is also a sheet having a planar dimension extending beyond both sides in the longitudinal direction and both sides in the width direction of the absorbent body. Further, the front sheet 13 and the back sheet 15 are stacked and joined in the thickness direction so that the substantially V-shapes of both end portions of the front sheet 13 and the back sheet 15 in the longitudinal direction are substantially aligned, thereby holding the absorbent body between the sheets 13 and 15.
As shown in fig. 3A and 3B, the leg gather portion 20 is a sheet member long in the longitudinal direction, and is joined to both sides in the width direction of the absorbent main body 10, respectively. When the diaper 1 is formed into a pants type, the leg gather portions 20 are contracted along the leg opening portions HL, thereby forming leg gathers. Each of the leg gather portions 20 is formed in such a manner that a first sheet 21 and a second sheet 22 made of nonwoven fabric or the like are placed in two layers in the thickness direction. Note that the absorbent main body 10 and the leg gather portion 20 are joined in the following manner: the widthwise inner ends of the leg gathers 20 are bonded using a hot melt adhesive or the like, and the widthwise inner ends of the leg gathers 20 are sandwiched between the topsheet 13 and the backsheet 15 of the absorbent main body 10.
As shown in fig. 3A and 3B, the belt portion 30 is a sheet member long in the longitudinal direction, and is provided on both sides in the width direction of the leg gather portion 20. When the diaper 1 is formed in a pants-type, the belt portion 30 forms a waistband (see fig. 1). The band portions 30 are each formed in such a manner that a first sheet 31 and a second sheet 32 made of nonwoven fabric or the like are placed in two layers in the thickness direction.
As described above, in the embodiment according to the present invention, each leg gather portion 20 and each belt portion 30 are integrally formed using the side sheet 40 as a single member. That is, the first sheet 21 of the leg gather portion 20 and the first sheet 31 of the belt portion 30 are constituted by a single sheet member 41, and the second sheet 22 of the leg gather portion 20 and the second sheet 32 of the belt portion 30 are constituted by a single sheet member 42. In the embodiment according to the present invention, in the side sheet 40, a portion on the inner side in the width direction with respect to the fold line FL corresponds to the leg gather portion 20, and a portion on the outer side in the width direction with respect to the fold line FL corresponds to the belt portion 30.
A leg gather elastic member 23 made of elastic thread or the like is disposed between the first sheet 21 and the second sheet 22 of each leg gather portion 20, and the leg gather elastic member 23 is fixed by a hot melt adhesive or the like in a state of being elongated in the longitudinal direction. In fig. 3A, the two leg gather elastic members 23 are arranged at positions inward with respect to the widthwise inner end of each leg gather cut portion 25 (i.e., the widthwise inner end of each leg opening portion HL). These leg gather elastic members 23 provide the leg gather portion 20 with stretchability in the longitudinal direction. Therefore, when the diaper 1 is formed into a pants type, the leg gather portions 20 are contracted along the leg opening portions HL, thereby forming leg gathers. This improves the fit around the legs of the wearer.
Likewise, a belt elastic member 33 made of an elastic thread or the like is disposed between the first sheet 31 and the second sheet 32 of each belt portion 30, and the belt elastic member 33 is fixed by a hot melt adhesive or the like in a state of being elongated in the longitudinal direction. In fig. 3A, the plurality of belt elastic members 33 are arranged so as to be lined up in the width direction in a region outside with respect to the outer side end in the width direction of each belt cut portion 35 (i.e., the outer side end in the width direction of each leg opening portion HL). These belt elastic members 33 provide the belt portion 30 with lengthwise stretchability. Therefore, when the diaper 1 is formed in the pants-type, a contraction force along the waistline opening HB is generated almost over the belt portion 30, and the diaper 1 is prevented from slipping off from the waist when worn.
As shown in fig. 2B, it should be noted that the leg gather elastic member 23 and the belt elastic member 33 are arranged so as not to overlap with each other in the thickness direction. That is, the leg gather elastic member 23 and the belt elastic member 33 have a positional relationship alternately arranged in the width direction when viewed from above in the thickness direction. This makes it easy to fit the regions where the elastic members 32 and 33 are arranged around the leg openings HL of the pants-type diaper 1 in a flat shape.
Each stretchable sheet 43 made of nonwoven fabric or the like and having stretchability is provided between the sheet member 41(21, 31) and the sheet member 42(22, 32). As shown by the hatched area in fig. 3A, such a stretch panel 43 is a belt-like elastic sheet member having a width larger than the width of the leg opening HL in the width direction, has an opening having the same shape as the leg opening HL, and is fixed to the sheet members 41, 42 using a hot melt adhesive or the like in a state of being elongated in the longitudinal direction. Therefore, the peripheral edge portion of each leg opening HL is reinforced by the stretchable sheet 43 over the entire periphery thereof. Further, the advantage of the contractive force generated by the flat stretchable sheet 43 improves the adhesiveness of the peripheral edge portion of the leg opening HL. If the stretch sheet 43 is not provided in the peripheral edge portion of the leg opening portion HL, but only elastic threads such as the leg gather elastic member 23 are provided, gathers are easily formed between the elastic threads. This may easily cause the leg opening portions HL to relax when the diaper 1 is worn, or easily leave marks of elastic threads on the skin. In contrast, providing the flat stretchable sheet 43 at the peripheral edge of the leg opening HL can improve the adhesiveness.
Such a stretch sheet 43 is, for example, a nonwoven fabric in which stretchability is produced in such a manner that a nonwoven fabric including elastomer fibers such as a polyurethane elastomer exhibiting substantially elasticity and thermoplastic resin fibers such as a polyolefin resin exhibiting substantially non-elasticity is subjected to a so-called gear-stretch process. However, the present invention is not limited thereto.
Further, as shown in fig. 3B, the outer end region in the width direction of the belt portion 30 is folded back twice to the inside in the width direction at the first belt end folding line FLb1 and the second belt end folding line FLb2 and fixed in this folded-back state using a hot melt adhesive or the like. That is, the second belt end portion fold line FLb2 is a portion that becomes the inner end portion 30ei in the width direction of the belt portion 30 in fig. 2A, and this portion also becomes the waistline opening portion HB. The waistline opening portion HB is configured in such an end-folded structure that it is possible to reduce the pressure around the waist of the wearer when the diaper 1 is worn. However, the end region in the width direction may not necessarily have the fold-back structure as described above.
< production of diaper 1 >
Subsequently, the method of manufacturing the diaper 1 will be briefly explained. Fig. 4 is a diagram showing one example of the manufacturing step of the diaper 1.
In this example, the diaper 1 is manufactured in such a manner that a substrate sheet used as a material is subjected to predetermined processing (S101 to S105) while the substrate sheet is conveyed in a conveying direction. Hereinafter, the conveying direction of the sheet member is referred to as "MD direction", and the direction orthogonal to the MD direction is referred to as "CD direction". The MD direction is a direction along the length direction (longitudinal direction) in fig. 2A, and the CD direction is a direction along the width direction in fig. 2A.
In the embodiment according to the present invention, the sheet members constituting the base sheet of the diaper 1 are the absorbent-main-body continuous sheet 10A and the side continuous sheet 40A. The absorbent-main-body continuous sheet 10A is a sheet member in which a plurality of absorbent main bodies 10 are continuously arranged in the longitudinal direction (longitudinal direction). That is, the absorbent-main-body continuous sheet 10A is a sheet member formed in a state in which: the plurality of absorbent bodies 11 are sandwiched in the thickness direction between the continuous piece of the front sheet 13 and the continuous piece of the back sheet 15 extending in the MD direction. Similarly, the side continuous sheet 40A is a sheet member in which the side sheets 40 forming the leg gather portion 20 and the belt portion 30 are continuously arranged in the longitudinal direction (longitudinal direction).
First, as shown in fig. 4, a base material sheet is continuously conveyed in the MD direction (S101), the base material sheet being in a state: the side continuous sheets 40A are joined to both sides of the absorbent-main-body continuous sheet 10A in the CD direction (width direction).
Subsequently, with respect to the substrate sheet being conveyed, the leg gather notch portions 25 and the tape notch portions 35 constituting the leg opening portions HL are formed at positions respectively crossing the folding line FL on both sides in the CD direction (width direction) of the absorbent body 11 (S102). These cut portions are formed using a cutting roller or the like, not shown. It should be noted that the state shown using the step S102 in fig. 4 corresponds to the state of the diaper 1 in the developed state in fig. 3A.
Subsequently, each portion of the side continuous sheet 40A corresponding to the belt portion 30 is folded back inward in the CD direction (width direction) at a fold line FL so that a portion of the absorbent main body 10 and each leg gather portion overlap with the belt portion 30 in the thickness direction (S103).
Subsequently, the first joining portion WL1 and the second joining portion WL2 are formed by a joining method such as ultrasonic welding or thermal welding, thereby joining the belt portion 30 to the absorbent main body 10 and the leg gather portion 20 (S104).
Subsequently, the substrate sheet is cut (S105). Specifically, the diapers 1 are cut one by one from a base material sheet continuous in the MD direction. Further, four corners of each rectangle are cut along the first joint WL1 and the second joint WL 2. Thus, the diaper 1 in a flat state shown in fig. 2A is formed.
< details of the absorbent body 11 >
Fig. 5 is a plan view showing a detail of the absorber 11. Fig. 5 shows a state when the absorber 11 is in a flat state. That is, the absorbent body 11 is in a state of being elongated in the longitudinal direction, as in the state of fig. 2A. Fig. 6A and 6B are diagrams showing a deformed state of the absorbent body 11 when the diaper 1 is worn.
As shown in fig. 5, the absorber 11 is formed in a substantially hourglass shape in plan view, such that the absorber 11 has a narrow portion 11n in which the distance in the width direction between the front end and the rear end in the length direction of the absorber 11 is narrowed, and a narrowest portion having a minimum width is formed at a position MN in the length direction of the narrow portion 11 n. The narrow portion 11n is a portion which comes into contact with the groin of the wearer when the diaper 1 is worn. Therefore, the reduction in the interval in the width direction of the narrow portion 11n can alleviate the interference between the groin of the wearer and the absorbent body 11 and reduce the wearer's discomfort and discomfort, thereby improving the fit when the diaper 1 is worn.
The absorbent body 11 has a plurality of groove portions 12 formed therein. In the embodiment according to the present invention, three types of the groove portions 12, that is, the first groove portion 121, the second groove portion 122, and the third groove portion 123 (refer to fig. 5) are formed.
The first groove portions 121 are formed linearly along the longitudinal direction at substantially the center in the width direction of the absorbent body 11. The front end 121ef of the first groove 121 in the longitudinal direction is provided between the position MN of the narrowest portion and the position 11nf of the front end of the narrower portion 11 n. Further, a rear end portion 121er in the longitudinal direction of the first groove portion 121 is provided at a position of an intersection between the first groove portion 121 and a groove portion (a second groove portion 122A described later) formed on the front side in the longitudinal direction of the plurality of second groove portions 122. The region where the first groove portion 121 is provided is a region that comes into contact with a groove (cleft hip) from the vaginal opening to the buttocks of the wearer when the diaper 1 is worn. Hereinafter, this region will also be referred to as a central region.
The first groove portion 121 is a compressed portion formed by compressing the surface of the absorbent body 11 by a predetermined compression method, and has a function as a bending guide portion configured to guide bending of the absorbent body 11 in the thickness direction. When the diaper 1 is worn, the absorbent body 11 is bent along the first groove portions 121 in a mountain shape protruding toward the skin of the wearer. Therefore, the absorber 11 is appropriately deformed in accordance with the shape of the wearer's body. In the embodiment of the present invention, the absorbent body 11 is easily folded toward the skin side in the thickness direction by forming the first groove portions 121 by embossing from the non-skin side (see the P-P sectional view in fig. 6A) in the thickness direction of the absorbent body 11 (see the Q-Q sectional view in fig. 6B). It should be noted that the first groove parts 121 may not be formed as compressed parts formed by compressing the absorbent body 11, but formed as slits. Further, the first groove portion 121 may not be formed in a continuous line shape as in fig. 5, but formed in a form of a plurality of compressed portions arranged in a dot shape or other shapes along the length direction.
The plurality of second groove portions 122 are formed to intersect a straight line extending in the longitudinal direction passing through the center in the width direction of the first groove portion 121. In other words, the second groove portion 122 is provided to have a component in the width direction as compared with the first groove portion 121 provided along the length direction. In the embodiment of the present invention, two second groove portions 122A, 122B are provided in this order from the front side in the longitudinal direction. The groove portions 122A, 122B are arranged in a substantially parabolic shape so as to extend toward the rear side (back side) in the longitudinal direction while being outward in the width direction. Then, the second groove portion 122A provided on the front side in the longitudinal direction intersects with the first groove portion 121, and the second groove portion 122B provided on the rear side in the longitudinal direction is spaced apart from the first groove portion 121. It should be noted that three second groove portions 122 may be provided. The region where the second groove portion 122 is provided is a region that is in contact with a substantially planar portion of the wearer's body, around the coccyx above the groove (cleft hip) of the buttocks on the back side of the wearer. Hereinafter, this region is also referred to as a back-side region.
These second groove portions 122 are formed from the non-skin side in the thickness direction of the absorbent body 11 by a predetermined compression method such as embossing, as with the first groove portions 121. However, the second groove portions 122 may be formed by being compressed from the skin side in the thickness direction. Further, the second groove portion 122 does not need to have a function as a bending guide portion for guiding the absorbent body 11 to be bent in the thickness direction like the first groove portion 121. Therefore, when the second groove portions 122 are formed, the degree of compression of the absorbent body 11 can be reduced as compared with the first groove portions 121. In other words, the fiber density (density of the compressed portion) of the absorbent body 11 in the second groove portion 122 may be lower than the fiber density (density of the compressed portion) of the absorbent body 11 in the first groove portion 121. By providing such a difference in density between the first groove portions 121 and the second groove portions 122, the absorbent body 11 can be more easily bent at the first groove portions 121 having a high density than at the second groove portions 122. Therefore, the absorbent body 11 can be easily deformed into a mountain shape along the first groove portions 121.
The plurality of third groove portions 123 are formed to intersect the first groove portions 121 on the front side in the longitudinal direction of the second groove portions 122A. In the embodiment of the present invention, three third groove portions 123A, 123B, and 123C are provided in this order from the front side in the longitudinal direction. Each of the grooves 123A, 123B, and 123C is formed in a substantially parabolic shape so as to extend outward in the width direction and toward the front side (ventral side) in the longitudinal direction. The outer ends of these third groove portions 123 in the width direction reach the narrow portions 11 n. The region where these third groove portions 123 are provided is a region from the groove (cleft hip) of the buttocks to the base of the leg of the wearer when the diaper 1 is worn. The third groove 123 is formed substantially identically to the second groove 122.
Subsequently, the deformation of the absorbent body 11 when the diaper 1 is worn will be explained. Fig. 6A shows the absorbent body 11 in a flat state before the diaper 1 is worn. As described above, the region in which the first groove portions 121 are formed in the longitudinal direction is referred to as a central region, and the region located on the rear side in the longitudinal direction with respect to the central region is referred to as a rear-side region. Further, a region on the front side in the longitudinal direction with respect to the central region is referred to as a ventral region. Since the absorbent body 11 has a planar shape as in fig. 6A before the diaper 1 is worn, if the absorbent body 11 has such a planar shape as this, the absorbent body 11 is not easily fit to a human body having complicated irregularities.
Fig. 6B shows a state in which the absorbent body 11 is deformed while the diaper 1 is worn. When the diaper 1 is worn, the central region of the absorbent body 11 is held between the legs (groin) of the wearer so that a force acts to compress the absorbent body 11 inward in the width direction. By this compressive force, the central region of the absorber 11 is bent in the thickness direction along the first groove portions 121 to deform into a mountain shape protruding toward the skin side as shown in the Q-Q cross section in fig. 6B. When the central region is deformed into a mountain shape, the bent part of the mountain shape easily comes into contact with the groove of the hip of the wearer. Therefore, a good fit feeling can be produced in the central region.
On the other hand, since the body of the wearer is substantially planar in the back region, if the absorbent body 11 is deformed into a mountain shape as in the central region, the fit is deteriorated. However, in the embodiment of the present invention, the second groove portion 122 is provided to suppress the deformation of the absorber 11 into a mountain shape in the back-side region. Specifically, since the first groove portion 121 intersects the second groove portion 122A at the rear end portion 121er in the longitudinal direction, a force that deforms the absorbent body 11 into a mountain shape is transmitted from the first groove portion 121 to the second groove portion 122A and to the outside in the width direction along the second groove portion 122A. This force acts to widen the back-side region of the absorber 11 to the outside in the width direction, and thus the back-side region can easily maintain a planar shape. That is, the direction of the force acting to deform the absorbent body 11 into the mountain shape is changed by the intersection of the second groove portion 122A and the first groove portion 121. This makes it easy to control the deformation of the absorbent body 11 in the central region and the back-side region.
Further, a second groove portion 122B is provided in a region on the rear side in the longitudinal direction of the second groove portion 122A. Since the second groove portion 122B is provided at a position spaced apart from the first groove portion 121 by a predetermined distance, a force to deform the absorber 11 into a mountain shape does not easily act. Even if this force is transmitted to the position of the second groove portion 122B on the rear side in the longitudinal direction with respect to the second groove portion 122A, the deformation of the absorber 11 into the mountain shape can be suppressed by the second groove portion 122B provided so as to intersect with the longitudinal direction.
Therefore, among the plurality of second grooves provided in the direction intersecting the longitudinal direction, the foremost second groove 122A intersects the first groove 121, and the rearmost second groove 122B is provided at a distance from the first groove 121. This enables the absorbent body 11 to easily maintain a planar shape in the back-side region. Then, when the diaper 1 is worn, the back-side region of the absorbent body 11 is deformed in the following manner: rising up in the longitudinal direction from the rear end portion 121er along the wearer's body while maintaining its planar shape (refer to fig. 6B), which helps fit the wearer's body. In particular, the back-side region of the absorbent body 11 is susceptible to large forces from the buttocks of the wearer when the diaper 1 is worn. Therefore, by providing the first groove portions 121 and the second groove portions 122 so as to appropriately deform the absorbent body 11, a feeling of discomfort when the diaper is worn can be suppressed. It should be noted that the aforementioned "planar shape" does not only mean the concept of a completely flat surface, but also includes a curved surface having a curved shape along the body.
Further, in the diaper 1 according to the embodiment of the invention, the shape and arrangement of the second groove portion 122 are adjusted with respect to the second joint portion WL 2. This can easily deform the absorbent body 11 in the back region appropriately. Fig. 7 is a schematic plan view showing the pants-type diaper 1 when viewed from the rear side (back side).
When the diaper 1 is worn, the absorbent main body 10 is pulled outward in the width direction by the stretchable belt portion 30. At this time, on the back side, the tension caused by the belt portion 30 acts on the absorbent main body 10 through the second joint portion WL 2. That is, as shown in fig. 7, the absorbent main body 10 is pulled in a direction intersecting (orthogonal to) the second joint portion WL 2. On the other hand, in the absorbent body 11, the second groove portions 122A, 122B are formed in a substantially parabolic form so as to extend toward the rear side in the longitudinal direction (upward in the longitudinal direction in fig. 7) while being outward in the width direction, and are arranged such that the extension lines of the second groove portions 122A, 122B are orthogonal to the second joining portions WL2, respectively. In other words, the second groove portion 122 is arranged such that the smaller angles α a, α B of the angles between the extension line obtained by extending the second groove portions 122A, 122B to the rear side in the longitudinal direction and to the outer side in the width direction and the second engagement portion WL2 are within a predetermined range (for example, 70 ° or more, preferably 90 °). With this configuration, the tension acting on the second joining portions WL2 and the arrangement direction of the second groove portions 122A, 122B are easily aligned, and the force pulling the absorbent main body 10 to the outside in the width direction is also effectively made to act on the absorbent body 11 through the second groove portions 122, thereby making the absorbent body 11 easily wide in the width direction. Therefore, when the absorber 11 is deformed along the wearer's body, the entire back-side region easily maintains a substantially planar shape. This can improve the fit on the back side of the wearer.
Further, in fig. 5, third groove portions 123A to 123C are formed on the rear side in the longitudinal direction in the central region. This region deforms along the roundness of the wearer's buttocks when the diaper 1 is worn. Furthermore, due to the complex forces, the surface may wrinkle, such that the entire area contracts and/or the area may become wedged in the hips of the wearer. This may deteriorate the fit. However, in the diaper 1, the third groove portions 123A to 123C are provided in the region from the first groove portion 121 to the narrow portion 11n of the absorber 11, so that the surface shape of the region is easily maintained. This suppresses the generation of wrinkles and/or wedging in the hip portion, so that good fitting can be easily achieved. Further, the third groove portions 123A to 123C are formed in a substantially parabolic shape so as to extend toward the front side (ventral side) in the longitudinal direction while being outward in the width direction. Thus, the absorber 11 is easily deformed into a curved shape along such a parabola. Therefore, it is possible to achieve good fit to the roundness of the buttocks of the wearer.
On the other hand, in the ventral region of the absorbent body 11, the front end 121ef of the first groove portion 121 in the longitudinal direction is provided between the position 11nf of the front end of the narrower portion 11n of the absorbent body 11 and the position MN of the narrowest portion. The position where the front side end portion 121ef is provided is a position to be brought into contact with the vicinity of the front side end portion of the wearer's groin portion. In the region located on the front side in the longitudinal direction with respect to the front end portion 121ef, since the absorbent body 11 has a small portion sandwiched between the legs of the wearer, the force to deform the absorbent body 11 into a mountain shape is small. Further, when the diaper 1 is worn, since a complicated force is less likely to act on the abdominal side than on the back side (buttocks), a problem that wrinkles are generated in the absorbent body 11 and/or are wedged in the abdominal side is less likely to occur. Therefore, the front-side end portion of the first groove portion 121 is arranged between the position 11nf at the front-side end portion of the narrow portion 11n and the position MN of the narrowest portion. This enables the absorbent body 11 to maintain a planar shape (a curved surface along the abdomen of the body) in the abdomen-side region even without having a groove portion corresponding to the first groove portion 121.
As such, when the diaper 1 is worn, the absorber 11 is appropriately deformed in each of the back-side region, the central region, and the stomach-side region. This enables the three-dimensional shape of the absorber to easily conform to the human body and provides a good feeling of fit to the wearer. Further, as shown in fig. 1, in such a belt-type diaper, the improvement in the fit of the absorbent body 11 reduces the degree of expansion of the absorbent body 11 when the diaper is worn, and makes the appearance of the diaper 1 to be shaped like underwear such as shorts or briefs.
< other embodiment of absorbent article >
The pants-type disposable diaper 1 has been explained as an example of an absorbent article including an absorbent body 11, and the absorbent body 11 can be appropriately deformed corresponding to the shape of the body when the diaper is worn. However, the absorbent body 11 according to the embodiment of the present invention may be applied to, for example, the following absorbent articles. Fig. 8 is a plan view of a three-piece disposable diaper (diaper 2) as one example of an absorbent article in an unfolded state. Fig. 9 is a plan view showing a sanitary napkin (sanitary napkin 3) used as one example of an absorbent article.
The diaper 2 shown in fig. 8 is a so-called three-piece diaper and comprises three components 10, 30a and 30 b. Namely, the diaper 2 includes: an absorbent main body 10 (main body portion) including an absorbent body 11 as a first member; a stretchable abdominal-side band 30a as a second member covering the abdominal side of the wearer; and a stretchable back-side belt portion 30b as a third member for covering the back side of the wearer. Then, in the developed state in fig. 8, when the abdominal side belt portion 30a and the back side belt portion 30b are spaced apart in the longitudinal direction and arranged in parallel, the absorbent main body 10 bridges the interval between the abdominal side belt portion 30a and the back side belt portion 30b, and both end portions 10ef, 10er in the longitudinal direction of the absorbent main body 10 are respectively joint-fixed to the respective nearest sides of the abdominal side belt portion 30a and the back side belt portion 30 b. The external shape is roughly H-shaped in a plan view. Then, from this state, the absorbent main body 10 is folded in half at the center position CL in the longitudinal direction thereof. When the abdominal side band portion 30a and the back side band portion 30b opposed to each other in this folded-in-half state are joined/connected at the abdominal side band side edge portion 30ae and the back side band side edge portion 30be (i.e., the respective end portions in the width direction) to be brought into contact with the side portion of the wearer, the band portions 30a, 30b are formed in a loop shape. Thus, provided is a diaper 2 formed with a waistline opening portion 1HB and a pair of leg opening portions 1HL when worn.
The sanitary napkin 3 shown in fig. 9 comprises: an absorbent body 11; a surface layer 16 covering the absorber 11 from the skin side of the wearer; and a back layer 17 covering the absorber 11 from the non-skin side of the wearer. Then, the sanitary napkin 3 is formed by joining the peripheral edges (hatched area in fig. 9) of the surface layer 16 and the back layer 17 in a state where the absorber 11 is sandwiched between the surface layer 16 and the back layer 17 in the thickness direction. It should be noted that the sanitary napkin 3 may be an absorbent sheet for daily vaginal discharge (i.e., a panty liner) or the like, and is not limited to a sanitary napkin.
The surface layer 16 is a liquid-permeable sheet member that allows liquid such as body fluid to pass through, and is made of, for example, nonwoven fabric. However, the material is not limited thereto as long as it is a sheet member having a structure that allows liquid to pass therethrough and is safe to be in contact with the skin of the user when the sanitary napkin 10 is used. For example, the material may be a fabric or mesh. The surface layer 16 is larger than the absorbent body 11 in the longitudinal direction and the width direction, and can cover the entire area of the absorbent body 11.
The back surface layer 17 is a liquid-impermeable sheet member, and is formed using: films of main materials such as polyethylene, propylene, and the like; a gas-permeable resin film; a sheet formed by joining a resin film having air permeability to a nonwoven fabric such as a spunbond or spunlace fabric, or the like. Since the back surface layer 17 is liquid-impermeable, when the sanitary napkin 3 is used, the liquid absorbed by the absorbent body 11 through the surface layer 16 can be suppressed from leaking to the clothing side (non-skin side) of underwear or the like. The back surface layer 17 has substantially the same shape as the surface layer 16, and the back surface layer 17 is desirably flexible to such an extent that a user does not feel discomfort when using the sanitary napkin 10.
When these absorbent articles (diaper 2, sanitary napkin 3) are worn, the absorbent body 11 is appropriately deformed in accordance with the shape of the wearer's body (see fig. 6A and 6B), so that a good fit feeling can be provided to the wearer.
The term "other" means
The above embodiments are intended to facilitate the understanding of the present invention and are not to be construed as limiting the present invention in any way. It is needless to say that various modifications and improvements can be made to the present invention without departing from the gist of the present invention, and equivalents thereof are included.
In the above embodiment, the first groove portion 121 is formed at the central position in the width direction of the absorbent body 11; however, it is not limited thereto. That is, the first folding back groove portion 121 may be formed at a position slightly shifted in the width direction from the central position. However, absorbent articles such as the diaper 1 and the sanitary napkin 3 are basically designed to be symmetrical with respect to the widthwise central position. Therefore, the first returning groove part 121 is preferably formed at the center position in the width direction.
Description of the reference numerals
1 diaper (absorbent article, disposable diaper),
2 diapers (absorbent articles, three-piece disposable diapers),
3 sanitary napkins (absorbent articles, sanitary napkins),
10 absorbent body, 10A absorbent body continuous sheet,
10ef front end portion, 10er rear end portion,
11 absorber, 11n narrow part, 11nf front side end position,
12 groove parts,
121 a first groove part, 121ef a front end part, 121er a rear end part,
122 second grooves, 122A and 122B second grooves,
123 third grooves, 123A, 123B, 123C third grooves,
13 a front dough sheet,
15 back sheet, 15f leakproof sheet, 15n outer sheet,
16 surface layer, 17 back surface layer,
20 leg gather parts, 20A leg gather continuous sheet,
An outer end portion in the width direction of 20eo,
21 a first sheet, 22a second sheet, 23a leg gather elastic member,
25 leg gather cut parts,
30 belt parts, 30A belt continuous pieces,
30a ventral band part, 30ae ventral band side edge part,
30b back side belt part, 30ab back side belt side edge part,
30ei width direction inner end, 30eo width direction outer end,
31 a first sheet, 32 a second sheet, 33 a belt elastic member,
35 with a cut part,
40 side sheet, 40A side continuous sheet,
41 pieces of members, 42 pieces of members, 43 expansion pieces,
HB waist opening part, HL leg opening part,
A center position of CL,
FL fold-back line,
FLb1 first belt end fold line, FLb2 second belt end fold line,
WL1 first joint, WL2 second joint.
Claims (9)
1. An absorbent article having a longitudinal direction, a width direction and a thickness direction orthogonal to each other, the absorbent article comprising an absorbent body having liquid absorbency,
the absorbent body includes:
a first groove portion formed along the longitudinal direction, the first groove portion being configured to guide the absorbent body to flex in the thickness direction; and
a plurality of second groove portions formed to intersect a straight line passing through a center of the first groove portion in the width direction and along the longitudinal direction, the plurality of second groove portions being aligned in the longitudinal direction,
a second groove portion arranged on a rearmost side in the longitudinal direction among the plurality of second groove portions is spaced apart from a rear-side end portion in the longitudinal direction of the first groove portion when the absorber is in a planar state,
the first groove portion and the second groove portion are both formed so as to compress the absorbent body, and
the density of the absorbent body at the first groove portion is greater than the density of the absorbent body at the second groove portion.
2. The absorbent article of claim 1, further comprising:
a main body section having the absorber; and
a band portion having stretchability, wherein
The absorbent article is formed with a waist opening portion and a pair of leg opening portions.
3. The absorbent article of claim 2, wherein the absorbent article further has a longitudinal direction,
the absorber and the main body portion being folded in half at a predetermined position in the longitudinal direction with the longitudinal direction being arranged along the longitudinal direction,
one end side and the other end side of the body portion in the longitudinal direction are connected via the belt portion,
at least a part of the waist opening portion is formed by an end edge of the belt portion on the upper side in the longitudinal direction,
the pair of leg opening portions are formed by an end edge on a lower side in the longitudinal direction of the band portion and both end edges in the width direction of the main body portion,
joining portions are formed which are inclined outward in the width direction from the waist opening portion toward the leg opening portions, respectively, in the longitudinal direction, the joining portions joining at least the main body portion and the belt portion together.
4. The absorbent article according to any one of claims 1 to 3,
the first groove portion is formed so as to compress the absorbent body from the non-skin side in the thickness direction.
5. The absorbent article according to claim 1,
the second groove portion is arranged so as to extend from the front side toward the rear side in the longitudinal direction to the outside in the width direction.
6. The absorbent article according to claim 3,
the second groove portion is arranged to extend from a front side toward a rear side in the longitudinal direction to an outer side in the width direction, and
a smaller angle of angles between an extension line obtained by extending the second groove portion to the rear side in the longitudinal direction and to the outer side in the width direction and the joint portion provided on the rear side is 70 ° or more.
7. The absorbent article according to claim 1,
the plurality of third groove portions are formed on the front side in the longitudinal direction with respect to the second groove portions so as to intersect with the first groove portions.
8. The absorbent article according to claim 1,
a rear-side end portion in the longitudinal direction of the first groove portion is arranged at a position of an intersection between the first groove portion and the second groove portion arranged most frontward in the longitudinal direction.
9. The absorbent article according to claim 1,
the absorber has a narrow portion whose distance in the width direction is narrow in a region between a front-side end portion and a rear-side end portion in the length direction of the absorber, and
a front-side end portion in the longitudinal direction of the first groove portion is arranged between a position where a distance in the width direction of the narrow portion in the longitudinal direction is narrowest and a position of a front-side end portion in the longitudinal direction of the narrow portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015126654A JP6412834B2 (en) | 2015-06-24 | 2015-06-24 | Absorbent articles |
| JP2015-126654 | 2015-06-24 | ||
| PCT/JP2016/061660 WO2016208255A1 (en) | 2015-06-24 | 2016-04-11 | Absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107847376A CN107847376A (en) | 2018-03-27 |
| CN107847376B true CN107847376B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680036987.XA Active CN107847376B (en) | 2015-06-24 | 2016-04-11 | Absorbent article |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6412834B2 (en) |
| CN (1) | CN107847376B (en) |
| WO (1) | WO2016208255A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6942499B2 (en) * | 2017-03-24 | 2021-09-29 | 大王製紙株式会社 | Pants type disposable diapers |
| JP6844413B2 (en) * | 2017-05-17 | 2021-03-17 | 王子ホールディングス株式会社 | Absorbent articles and their manufacturing equipment |
| JP2020036735A (en) * | 2018-09-04 | 2020-03-12 | 花王株式会社 | Absorbent article |
| CN114732598B (en) * | 2021-07-30 | 2023-11-03 | 尤妮佳股份有限公司 | Pants-type absorbent article |
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| CN203483582U (en) * | 2012-06-11 | 2014-03-19 | 花王株式会社 | Absorbable article |
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| HU215517B (en) * | 1992-10-27 | 1999-01-28 | Procter & Gamble Far East Inc. | Disposable diaper with fully elasticized waist opening and method for making diapers |
| JP2945336B2 (en) * | 1996-02-26 | 1999-09-06 | 白十字株式会社 | Disposable diapers |
| JP5992381B2 (en) * | 2013-09-04 | 2016-09-14 | 大王製紙株式会社 | Absorbent articles |
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- 2015-06-24 JP JP2015126654A patent/JP6412834B2/en active Active
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- 2016-04-11 WO PCT/JP2016/061660 patent/WO2016208255A1/en active Application Filing
- 2016-04-11 CN CN201680036987.XA patent/CN107847376B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395914A (en) * | 1992-10-27 | 2003-02-12 | 宝洁公司 | Disposable diaper |
| CN203483582U (en) * | 2012-06-11 | 2014-03-19 | 花王株式会社 | Absorbable article |
| JP2014193210A (en) * | 2013-03-28 | 2014-10-09 | Daio Paper Corp | Disposable diaper |
| CN104546300A (en) * | 2013-10-28 | 2015-04-29 | 徐菘辰 | Conception and governor vessel acupoint physiotherapy pure plant sanitary towel |
| JP2015112268A (en) * | 2013-12-11 | 2015-06-22 | 花王株式会社 | Absorbent article |
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| Publication number | Publication date |
|---|---|
| JP6412834B2 (en) | 2018-10-24 |
| WO2016208255A1 (en) | 2016-12-29 |
| JP2017006470A (en) | 2017-01-12 |
| CN107847376A (en) | 2018-03-27 |
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