WO2014084234A1 - 使い捨ておむつ - Google Patents
使い捨ておむつ Download PDFInfo
- Publication number
- WO2014084234A1 WO2014084234A1 PCT/JP2013/081860 JP2013081860W WO2014084234A1 WO 2014084234 A1 WO2014084234 A1 WO 2014084234A1 JP 2013081860 W JP2013081860 W JP 2013081860W WO 2014084234 A1 WO2014084234 A1 WO 2014084234A1
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- WO
- WIPO (PCT)
- Prior art keywords
- crotch
- region
- disposable diaper
- sheet
- product
- Prior art date
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Classifications
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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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
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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
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
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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
- A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
Definitions
- the present invention relates to a disposable diaper.
- Disposable diapers having an absorbent body extending toward at least one of the region and the rear waistline region are known.
- a technique in which a liquid-permeable second sheet that is bulkier than the top sheet is provided between the absorber and the top sheet in order to enhance the ability to take in and retain excretory fluid.
- FIG. 4A shows a state in which the disposable diaper 10 provided with such a second sheet 51 is attached to the wearer
- FIG. 4B shows that the disposable diaper 10 is attached to the wearer.
- the result of CT scan in the state where it is in a state is shown typically.
- the disposable diaper 10 hangs down in the crotch part of the wearer when the disposable diaper 10 is worn on the wearer.
- the second sheet 51 is provided, the second sheet 51 is bent and further hangs down, so that the second sheet 51 is excreted from the excretion opening of the wearer.
- the excretion liquid A is taken in and held appropriately, it becomes insufficient to diffuse, particularly when the excretion liquid A is large or when it is excreted several times after being excreted more than once.
- the problem is that a large amount of excretory fluid A is present in the space between the wearer and the disposable diaper 10 and easily leaks out of the disposable diaper 10 according to the movement of the wearer. There was a point.
- the present invention has been made in view of such a situation, and can more preferably express the absorption holding function and the diffusion function of the second sheet provided between the absorber and the top sheet, and as a result, the wearer It aims at provision of the disposable diaper which can reduce the quantity of excretion fluid which exists in the space between a disposable diaper, and can control the leak of excretion fluid to the exterior resulting from a wearer's movement.
- the first feature of the present invention includes a front waistline region, a rear waistline region, and a crotch region positioned between the front waistline region and the rear waistline region, and a pair of leg opening portions are formed. And an absorbent body extending across at least one of the front waistline region and the rear waistline region across the crotch region, and a product longitudinal direction from the front waistline region to the rear waistline region, and orthogonal to the product longitudinal direction A disposable diaper having a product width direction that extends along the product width direction in the front waistline region and the rear waistline region, and is configured to hold the disposable diaper on a wearer's body.
- the crotch expansion and contraction part is provided apart from the waistline holding part without intersecting the waistline holding part, and is disposed so as to overlap with at least the region where the absorber is disposed.
- a liquid-permeable top sheet is provided on the skin contact surface side of the disposable diaper, and the liquid-permeable second sheet is bulkier than the top sheet between the top sheet and the absorber. The second sheet is arranged so as to overlap the area where the crotch stretchable part is arranged.
- FIG. 1 is a developed plan view of a disposable diaper according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the disposable diaper according to the present embodiment taken along line F1-F1 shown in FIG. Drawing 3 is a figure showing the state where the disposable diaper concerning the embodiment of the present invention is equipped with the wearer.
- FIG. 4 is a view showing a state in which a conventional disposable diaper is attached to a wearer.
- a disposable diaper 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
- the tape-type disposable diaper 10 is described as an example, but the present invention is also applicable to the pant-type disposable diaper 10.
- FIG. 1 is a developed plan view of a disposable diaper 10 according to the present embodiment.
- deployment top view shown in FIG. 1 is a figure of the state which extended the leg expansion-contraction part 75 and the leg side gathers 80 until the state in which wrinkles, such as the top sheet 50 which comprises the disposable diaper 10, and the side flap 70, are not formed.
- the leg side gather 80 is illustrated in an expanded and contracted state.
- FIG. 2 is a cross-sectional view of the disposable diaper 10 according to the present embodiment taken along line F1-F1 shown in FIG. 1, and FIG. 3 (a) shows the disposable diaper 10 according to the present embodiment worn by the wearer.
- FIG. 3B is a diagram schematically showing a CT scan result in a state where the disposable diaper 10 according to the present embodiment is worn by the wearer.
- the disposable diaper 10 As shown in FIG. 1, the disposable diaper 10 according to the present embodiment has a front waistline region 20, a crotch region 25, and a back waistline region 30. Further, the disposable diaper 10 is formed with a pair of leg-hole openings 35.
- the front waistline area 20 is a part in contact with the wearer's front waistline part
- the back waistline area 30 is a part in contact with the wearer's back waistline part
- the crotch area 25 is in contact with the front waistline area 20 and the back. It is a part located between the waist area 30.
- the direction from the front waistline region 20 to the rear waistline region 30 is referred to as a product longitudinal direction L
- a direction orthogonal to the product longitudinal direction L is referred to as a product width direction W.
- the crotch portion 200 is formed in the crotch region 25, and the region on the stomach side of the wearer than the crotch portion 200 is defined as the front waistline region 20, and the back side of the wearer than the crotch portion 200 is defined. Is defined as a rear waistline region 30.
- a pair of leg opening 35 is formed in the disposable diaper 10.
- the leg opening 35 is provided at a side end portion of the disposable diaper 10 in the product width direction W, and is disposed along the wearer's leg in a state where the disposable diaper 10 is worn by the wearer. It is.
- the disposable diaper 10 includes an absorbent body 40 that straddles the crotch region 25 and extends from the crotch region 25 toward at least one of the front waistline region 20 and the rear waistline region 30.
- the absorber 40 is comprised by the absorptive core 40a and the core wrap 40b.
- the absorbent core 40a is the same as that used in conventional disposable diapers, and the absorbent core 40a can be appropriately configured using known members and materials such as pulverized pulp and high-absorption polymer.
- the absorbent core 40a is wrapped with a sheet-like core wrap 40b.
- the core wrap 40b is a sheet that covers the absorbent core 40a. At least a part of the skin contact surface side S1 of the core wrap 40b is made of various fiber nonwoven fabrics or tissue sheets having liquid permeability.
- an air-through fiber nonwoven fabric having a mass of about 10 to 30 g / m 2 a spunbond nonwoven fabric, an SMS (spunbond-meltblon-spunbond) nonwoven fabric, a mass of about 10 to 30 g / m 2 is used.
- SMS spunbond-meltblon-spunbond
- a liquid-permeable top sheet 50 is provided on the surface side (skin contact surface side) S ⁇ b> 1 of the absorber 40, and the back surface side (non-skin contact) of the absorber 40.
- a back sheet 60 is provided on the surface side S2.
- a liquid-impermeable leak-proof sheet 61 is provided between the top sheet 50 and the back sheet 60.
- a liquid-permeable second sheet 51 is provided between the top sheet 50 and the absorber 40.
- the second sheet 51 is preferably bulkier than the top sheet 50.
- the bulk of the nonwoven fabric such as the second sheet 51 and the top sheet 50 can be measured as follows.
- the diameter of the circular probe is adjusted to 40 mm and the load is adjusted to 3.0 g / cm 2, and the bulk of the nonwoven fabric to be measured is measured. You can also.
- the size of the nonwoven fabric to be measured is less than 40 mm
- the size of the circular probe is changed and the load is adjusted to 3.0 g / cm 2 to measure the bulk of the nonwoven fabric to be measured. You may go.
- the second sheet 51 includes a crosslinked cellulose fiber.
- Cross-linked cellulose fibers are less likely to form hydrogen bonds between fibers (compared to normal cellulose fibers). At the time of excretion absorption, ordinary cellulose fibers tend to lose hydrogen bonds and lose sheet bulk. On the other hand, by using crosslinked cellulose fibers, since there are few hydrogen bonds between the fibers, the change in the bulk due to the absorption of excrement can be reduced, and as a result, the situation that the bulk is lost can be prevented.
- Side flaps 70 are respectively provided on both side edges of the absorbent body 40 in the product width direction W.
- the side flap 70 is comprised by the nonwoven fabric which piled up the 1 sheet or 2 or more sheets.
- the disposable diaper 10 includes a pair of fastening tapes 90 in the rear waistline region 30, and in a predetermined region on the non-skin contact surface side of the front waistline region 20.
- the target unit 95 is provided.
- the front waistline region 20, the rear waistline region 30, the fastening tape 90, and the target portion 95 constitute the waistline holding portion 150.
- the waistline holding portion in the rear waistline region 30 is a range extending in the product width direction W from the region where the engaging member of the fastening tape 90 is provided, and the waistline holding portion in the front waistline region 20 is the target portion 95. This is a range extending in the product width direction W from the provided region.
- the disposable diaper 10 which concerns on this embodiment may be provided with the crotch expansion-contraction part 200a in the crotch region 25. As shown in FIG. 1, the disposable diaper 10 which concerns on this embodiment may be provided with the crotch expansion-contraction part 200a in the crotch region 25. As shown in FIG. 1, the crotch expansion-contraction part 200a in the crotch region 25.
- the crotch expansion / contraction part 200a is in the crotch part 200, more specifically, in the absorber arrangement region where the absorber 40 is arranged in the crotch region 25 across the center in the product width direction. Is formed.
- the configuration of the crotch expansion / contraction part 200a will be described in detail later.
- leg stretchable parts which are formed along the leg opening 35 and extend at least in the product longitudinal direction L
- Leg gather 75 is provided.
- the leg stretchable part 75 is longer than the crotch stretchable part 200a in the product longitudinal direction L, and is provided outside the crotch stretchable part 200a in the product width direction W.
- the leg expansion / contraction part 75 should just be comprised so that the leg periphery opening part 35 can be expanded-contracted in the product longitudinal direction L, may be arrange
- the part may be arranged in a state inclined with respect to the leg opening 35.
- leg stretchable portion 75 is a portion that is substantially shrunk in the product longitudinal direction L by a stretchable sheet or the like, and is a concept that excludes a portion where the stretchable sheet is disposed in a state where the shrinkage force is not exerted.
- the structure of the leg expansion-contraction part 75 is demonstrated in detail later.
- a pair of leg side gathers 80 extending along the product longitudinal direction L may be provided inside the pair of leg stretchable portions 75 (near the center in the product width direction W). .
- the leg side gathers 80 are provided at the inner end of the side flap 70 in the product width direction W, and are stand-up stretchable gathers that are disposed on the inner side in the product width direction W than the leg stretchable parts 75.
- the leg side gather 80 can adopt a conventionally well-known configuration, and specifically, may be configured by a sheet material different from the side flap 70.
- the side flap 70 is folded back to the top sheet 50 side at the inner end in the product width direction W, and is laminated in two layers.
- An elastic member 71 is provided between the side flaps 70 in a stacked state in a state of being stretched in the product longitudinal direction L.
- a leg side gather 80 is formed by the side flap 70 and the elastic member 71.
- the leg side gathers 80 include a joining portion 81 joined to the top sheet 50 or the back sheet 60 and a free end portion 82 on which the elastic member 71 is disposed.
- the central portion in the product longitudinal direction L including the crotch region 25 is contracted in the product longitudinal direction L by the elastic member 71 to form a contracted portion 84.
- the leg side gather 80 rises with the joint portion 81 as the base end portion, and the contraction portion 84 of the free end portion 82 contacts the wearer's skin with the apex portion. That is, the joint portion becomes the base end portion of the rising side of the leg side stretchable portion.
- the contraction portion 84 is a portion substantially contracted in the product longitudinal direction L by the elastic member 71, and is a concept excluding a portion where the elastic member 71 is disposed in a state where the contraction force is not exerted.
- a joining portion 81 where the side flap 70 and the top sheet 50 (or the back sheet 60 or the like) are joined is indicated by hatching.
- a plurality of joint portions 81 are provided, the first joint portion 81A is disposed outside the contraction portion 84 in the product longitudinal direction L, and the second joint portion 81B is in the product width direction than the contraction portion 84. It is arranged outside W.
- leg side gathers 80 are configured such that the center portion in the product longitudinal direction L including the crotch region 25 rises toward the wearer.
- the first joint portions 81A disposed outside the contraction portion 84 in the product longitudinal direction L are joined to the top sheet 50.
- the second joint portion 81 ⁇ / b> B disposed outside the contraction portion 84 in the product width direction W is the crotch stretch portion 200 a and the leg stretch portion 75 in the product width direction W. It is arranged between.
- the second joining portion 81B is joined to the back sheet 60 or the leak-proof sheet 61 with the entire length in the product longitudinal direction L.
- the joining part 81 of the leg side gathers 80 can employ various configurations.
- the joining portion 81 may be, for example, a portion that extends from the crotch region 25 to the front waistline region 20 and the back waistline region 30 in the product longitudinal direction L, and is joined to the top sheet 50, or more than the absorbent core 40a. It may be a portion joined to the back sheet 60 or the leak-proof sheet 61 outside the product width direction W, and is configured to be a standing base end portion.
- leg side gather 80 should just be a standing gather arrange
- the disposable diaper 10 may be provided with the waist expansion-contraction part 100 which is formed in the back waist area 30 and can expand-contract in the product width direction W.
- the waist stretchable portion 100 is provided between a pair of fastening tapes 90 in the product width direction W, and is configured to contract between the fastening tapes 90 in the product width direction W.
- the waist stretchable part 100 is constituted by a stretchable sheet.
- the member constituting the waist stretchable portion 100 is not particularly limited, but it is preferable to use a member that is as thin as possible, has low bending rigidity, and has a small width ratio.
- the waist stretchable portion 100 by configuring the waist stretchable portion 100 with a material having low bending rigidity, the waist stretchable portion 100 is easily bent along the wearer's body, and the waist stretchable portion is not subjected to a load on the wearer's body. 100 can be fitted along the wearer's body.
- the waist stretchable part 100 by configuring the waist stretchable part 100 with a material having a small width entering rate, shrinkage of the disposable diaper 10 in the product longitudinal direction W when the disposable diaper 10 extends in the product width direction W is suppressed, and the waist of the wearer is reduced. It is possible to suppress the disposable diaper 10 from being pulled down to the wearer's crotch side around the waist.
- a stretchable film having a basis weight of 20 to 45 g / m 2 is used as the waist stretchable portion 100.
- the waist stretchable part 100 is stretched by 1.25 to 2.5 times the length in the non-stretched state (natural state), and then backsheet 60 (or leakage prevention) by hot melt adhesive or heat treatment. Adhered to the sheet 61).
- the waist stretchable part 100 may be disposed between the leak-proof sheet 61 and the back sheet 60.
- the waist stretchable part 100 is between the core wrap 40b and the back sheet 60 (or the leak-proof sheet 61). May be arranged.
- the position of the waist stretchable part 100 is not particularly limited. Moreover, in the area
- waist expansion-contraction part 100 which concerns on this embodiment is comprised so that it may expand-contract in the product width direction W, you may be comprised so that it may expand / contract to both the product width direction W and the product longitudinal direction L. .
- the absorber 40 has a low rigidity region 210 in the rear waistline region 30 that has a lower basis weight than other portions of the absorber 40 or does not have the absorbent core 40a.
- the low rigidity region 210 is formed to extend to the vicinity of the end E9 on the rear waistline region 30 side in the product longitudinal direction L of the absorber 40.
- the width of the low rigidity region 210 in the product width direction W becomes wider toward the end E9 on the rear waistline region 30 side in the product longitudinal direction L of the absorber 40.
- the shape of the low rigidity region 210 is a wedge shape in the plan view of the disposable diaper 10.
- the absorber 40 has an expansion / contraction suppression region 220 that is a region in which expansion and contraction in the product width direction W is suppressed more than other regions.
- the expansion / contraction suppression region 220 is formed outside the low-rigidity region 210 in the product width direction W, respectively.
- the boundary between the expansion / contraction suppression region 220 and the low rigidity region 210 is formed by an arc that is convex toward the center in the product width direction W.
- the absorber 40 on the outer side in the product width direction W than the low-rigidity region 210 has a trapezoidal shape that protrudes toward the end E9 on the rear waistline region 30 side.
- the wear assistant can be given an image of the shape of the wearer's buttocks.
- the absorbent core 40a has the above-mentioned shape, or Since the waist elastic part 100 of the back waist area 30 is made into the above-mentioned shape, since the position which should put a wearer's buttocks can be reminded with respect to a wear assistant, the disposable diaper 10 is more correctly positioned. It becomes possible to attach to.
- the waist elastic part 100 and the absorber 40 are comprised so that it may overlap in at least one part in planar view of the disposable diaper 10.
- the waist stretchable part 100 is configured to overlap with at least a part of the low-rigidity region 210 in the plan view of the disposable diaper 10.
- the waist stretchable portion 100 is disposed so as to overlap a part of the low-rigidity region 210, but may be disposed so as to overlap all of the low-rigidity region 210.
- the expansion / contraction of the waist elastic part 100 is not hindered, and even if the waist elastic part 100 contracts, the low-rigidity area 210 becomes narrower and the product is lower than the low-rigidity area 210. Since the interval between the absorbers 40 on the outer side in the width direction W is narrowed, the absorber 40 is unlikely to rise in an unintended shape.
- the low rigidity region 210 has a width narrower than the width of the waist stretchable part 100 in consideration of prevention of leakage of excretory fluid.
- the low stiffness region 210 Since the portion closer to the end E9 on the rear waistline region 30 side is closer to the center in the product width direction W than the portion closer to the inseam region 25, the portion closer to the end E9 on the rear waistline region 30 side and the inseam region A difference in the amount of shrinkage in the product width direction W occurs at a portion closer to 25, and the rear waistline region 30 rises.
- the disposable diaper 10 is provided with the waist stretchable portion 100 that can be stretched in the product width direction W and the wedge-shaped low-rigidity region 210, the disposable diaper 10 is disposed on the non-skin contact surface side S2 when the disposable diaper 10 is worn.
- a cup shape in which the disposable diaper 10 swells is easily formed.
- the low-rigidity area 210 does not include the absorbent core 40a, and the waist stretchable part 100 exists so as to overlap the low-rigidity area 210.
- the portion near the end E9 on the 30 side is closer to the center of the product width direction W than the end position of the absorbent core 40a, and the rise of the rear waistline region 30 becomes more prominent, making the cup shape more stable Can be formed.
- the waist elastic part 100 exists beyond the side edge in the product width direction W of the absorbent core 40a, the back waistline region 30 in the product longitudinal direction L while forming the disposable diaper 10 in a cup shape.
- the absorptive core 40a of the position near the edge part E9 side it can be made to follow a wearer's body positively.
- At least a part of the waist stretchable part 100 and the low-rigidity area 210 exists in an area extending in the product width direction W from the pair of fastening tapes 90.
- the waist stretchable part that exists beyond the side edge in the product width direction W of the absorbent core 40a 100 is not placed under the wearer's body.
- the side edges of the waist stretchable part 100 are extended, and it becomes easy to make the position of the cup-shaped waist side closer to the wearer's body more reliably.
- the absorbent core 40a on the outer side in the product width direction W than the low-rigidity region 210 is convex toward the rear waistline region 30 side. For this reason, as mentioned above, in addition to facilitating the formation of a cup shape in which the disposable diaper 10 swells on the non-skin contact surface side S2, the surface area of the absorbent core 40a is maintained. Leakage of excreted liquid from the end can be prevented.
- the low-rigidity region 210 has a wedge shape in the plan view of the disposable diaper 10, and the boundary between the absorbent core 40 a and the low-rigidity region 210 is an arc that protrudes toward the crotch region 25. Is formed by.
- the radius of the arc is 50 mm to 200 mm.
- the length (width) in the product width direction W of the low rigidity region 210 increases nonlinearly as it goes to the end E9 on the rear waistline region 30 side in the product longitudinal direction L. Since the rise of the waist region 30 becomes more prominent, the cup shape can be formed more stably.
- the boundary between the absorbent core 40 a and the low rigidity region 210 is formed by an arc that protrudes toward the crotch region 25, the rear waistline region 30 is rounded by the contraction of the low rigidity region 210. It becomes a cup shape and becomes a shape which is easy to follow a wearer's rounded buttocks.
- the end portion E9 on the rear waistline region 30 side of the absorber 40 is formed with a convex shape toward the rear waistline region 30 on the left and right sides. Since the shape of the absorber 40 is reminiscent of putting the wearer's buttocks on, the wear assistant has an effect that the disposable diaper 10 can be more easily aligned with the correct position for the wearer.
- the bending stiffness in the present embodiment is based on a stiffness value based on the Taber method (JISP8125), and is measured by the following method.
- a sample for example, the absorber 40
- the bending rigidity measurement target portion is collected.
- the sample has a dimension of 70 mm (length in the product width direction W) ⁇ 38 mm (length in the product longitudinal direction L) with respect to the measurement target portion of the bending rigidity.
- the elastic member is removed.
- a Taber stiffness tester manufactured by Yasuda Seiki Seisakusho Co., Ltd. is used as a tester for measuring the rigidity value.
- the number of samples is 10, and it measures about each sample and makes the average value the rigidity value.
- the measurement procedure is as follows (a) to (e).
- the auxiliary weight is appropriately selected so that the indicated load scale falls within the range of 15 to 85% of the maximum scale.
- the rigidity value is obtained by the following formula.
- Rigidity value (mN ⁇ m) (((B) + (C)) / 2) ⁇ (auxiliary weight coefficient) ⁇ 9.8 1 ⁇ 10 ⁇ 2 If the width of the test piece cannot be 38 mm, it is converted into a bending moment of 38 mm width.
- the fastening tape 90 is attached to the region of the side flap 70 corresponding to the rear waistline region 30.
- the fastening tape 90 is provided with a base sheet 91 connected to the side flaps 70 and engagement hooks (not shown) as a plurality of engagement members. And a hook sheet 92 fixed to the material sheet 91.
- the hook sheet 92 is an area where an engagement member is provided, and the above-described waistline holding portion is an area extending from the hook sheet 92 in the product width direction W.
- the hook sheet 92 is fixed (specifically, joined) to the base sheet 91.
- the joining of the hook sheet 92 and the base sheet 91 is such that the rigidity of the fastening tape 90 does not become higher than necessary.
- the hook sheet 92 and the base sheet 91 are joined by a hot melt adhesive applied intermittently such as a dot shape, a line shape, or a spiral shape.
- the hook sheet 92 and the base sheet 91 may be joined by heat sealing or the like.
- the base sheet 91 is composed of one or two or more non-woven fabrics stacked.
- a non-woven fabric manufactured by a manufacturing method such as SB (spunbond) or SMS (spunbond-meltblown-spunbond) can be used.
- the basis weight of the nonwoven fabric constituting the base sheet 91 is 30 to 120 g / m 2 , preferably 40 to 90 g / m 2 .
- the target portion 95 is provided on the non-skin contact surface of the back sheet 60 in the front waistline region 20.
- the target portion 95 is configured so that the engagement hook of the fastening tape is hooked, and functions as a loop of a hook and loop locking system.
- an air-through nonwoven fabric can be used as the target part 95.
- the target portion 95 for example, a fiber nonwoven fabric made of polyolefin-based thermoplastic synthetic resin fibers or a polyolefin-based thermoplastic synthetic resin film can be used. Further, the loop attached to the target portion 95 can be formed of a polyolefin-based thermoplastic synthetic resin.
- a bulky nonwoven fabric that is embossed with a part thereof and prevented from fluffing on the nonwoven fabric surface may be used.
- the leak-proof sheet 61 of the disposable diaper 10 is formed of a nonwoven fabric, and a pattern indicating the attachment position of the fastening tape 90 is printed on the back sheet 60 or the non-skin contact surface of the leak-proof sheet 61, or a sheet of such a pattern It can be set as the target part 95 also by arrange
- the leg stretchable part 75 is arranged along the leg opening 35 provided outside the absorbent body 40 in the product width direction W, and is configured to be stretchable in the product longitudinal direction L.
- the leg expansion / contraction part 75 has the width direction inner end area
- the leg opening 35 and the leg expansion / contraction part 75 extend toward the outside in the product width direction W from the crotch area 25 toward the outside in the product longitudinal direction L, particularly in the rear waistline area 30.
- width direction inner end region 75I of the leg stretchable part 75 may be arranged continuously in the product longitudinal direction L or may not be continued in the product longitudinal direction L.
- the region in which the position of the leg opening 35 in the product width direction W is located on the innermost side in the crotch region coincides with the width direction inner end region 75I of the leg stretchable portion 75, but does not necessarily match. It does not have to be.
- the leg expansion / contraction part 75 is comprised with the elastic sheet.
- the stretchable sheet may be a stretchable film formed by melting a thermoplastic elastomer resin such as urethane or styrene, a stretchable nonwoven fabric made of stretchable fibers, a stretchable film or a stretchable nonwoven fabric.
- a composite sheet or the like obtained by laminating a non-stretchable sheet that has been cut or weakened can be used.
- the leg stretchable part 75 may be configured by arranging one or a plurality of thread-like / strip-like elastic members made of polyurethane elastic fiber or natural rubber.
- the leg expansion / contraction part 75 may be configured by a predetermined number of elastic members (for example, three elastic members).
- the leg expansion / contraction part 75 is arrange
- the leg stretchable part 75 is disposed between the leak-proof sheet 61 and the side flap 70.
- the width of the stretchable sheet member (the width in the product width direction W in the natural state of the disposable diaper 10) is preferably 5 mm or more and 45 mm or less at least in the crotch region 25, and is 12.5 mm or more and 35 mm or less. The following is preferable.
- this measurement was performed using a spring measure manufactured by Shinwa Measurement Co., Ltd. (tape portion: polyvinyl chloride coated with glass fiber) so as to be along the measurement target site (10 samples).
- the width of the stretchable sheet member is less than 5 mm, the force of partially tightening is not concentrated on the surface substantially along the circumference of the wearer's leg, and the elastic element is applied to the wearer's skin. If the effect of lowering the load does not appear and the width of the stretchable sheet member exceeds 45 mm, it is along the leg opening 35 compared to the length in the product width direction W of the entire disposable diaper 10 (in a natural state). The area becomes too wide, and the elastic sheet is easily wound around the wearer's body or turned over.
- the expansion / contraction rate of the leg expansion / contraction part 75 is preferably 1.5 to 2.2 times.
- the expansion / contraction rate of the leg expansion / contraction part 75 is set to 1.8 to 2.0 times.
- the expansion / contraction rate means the degree of expansion / contraction of the leg expansion / contraction part 75 in the expansion / contraction direction (product longitudinal direction L in this embodiment), and is defined as follows.
- Stretch rate (length in the stretch direction of the leg stretch portion 75 in the maximum stretched state) / (length in the stretch direction of the leg stretch portion 75 in the natural state)
- this expansion / contraction rate shall be measured as follows, for example.
- the disposable diaper 10 is taken out from the package.
- the arrangement area of the leg stretchable part 75 is cut out.
- the back sheet 60 joined to the leg stretchable part 75 is also cut out.
- the elongation rate of the sample of the leg stretchable part 75 after being cut out is measured, and the stretch rate of the leg stretchable part 75 is measured.
- Each sample is left for 60 minutes in an atmosphere of 20 ° C. ⁇ 2 ° C. and a relative humidity of 60% ⁇ 5% RH, and the length of the leg stretchable part 75 is measured along the stretch direction. This length is defined as “the length of the leg expansion / contraction part 75 in the natural state”.
- the length in the stretch direction of the desired region in such a state ie, the natural state
- the elongation percentage is measured by calculating with the above formula.
- the interval between the inner ends of the pair of left and right leg stretchable portions 75 in the product width direction W becomes wider as it goes from the crotch region 25 to the front waistline region 20, and as it goes from the crotch region 25 to the rear waistline region 30. Become wider.
- the leg stretchable portion 75 When the disposable diaper 10 is mounted on the wearer's body, the leg stretchable portion 75 is arranged in a shape that narrows toward the front and rear waists in the crotch portion, so that the leg stretchable portion 75 is more line-shaped of the wearer's body. Therefore, the leg stretchable part 75 is suitably arranged around the wearer's leg.
- the distance (D1 in the figure) at the end of the front waistline area 20 of the pair of left and right leg stretchable parts 75 is the distance (D2 in the figure) at the end of the rear waistline area 30 of the pair of left and right leg stretchable parts 75. Narrower than.
- intervals are the inside of the pair of left and right leg stretchable parts 75 in the product width direction W after the disposable diaper 10 is expanded and held in the product longitudinal direction L and the product width direction W from the natural state to the state without wrinkles. The distance between the ends is measured.
- the stretch of the skin surface of the wearer's body is particularly large in the buttocks, and is prominent at positions closer to the outside in the width direction.
- the leg expansion-contraction part 75 is closely_contact
- the leg expansion / contraction part 75 does not stretch. Therefore, the displacement of the disposable diaper 10 by the leg expansion-contraction part 75 can be suppressed.
- the interval between the wearer's legs is the narrowest at the crotch and widens from the crotch toward the abdomen or back. Since the leg opening 35 and the leg stretchable part 75 have shapes extending from the crotch region 25 toward the outside in the product longitudinal direction L and the outside in the product width direction W, the leg opening is provided along the wearer's leg. 35 and the leg elastic part 75 can be arrange
- the leg expansion / contraction part 75 is comprised so that the disposable diaper 10 may be curved along the circumference
- the end of the leg stretchable part 75 in the product longitudinal direction L is arranged so as to spread in the product width direction W, and is arranged in the vicinity of the waistline holding part. Therefore, the end of the leg stretchable portion 75 in the product longitudinal direction L acts to shrink in the product width direction W together with the waistline holding portion.
- the crotch stretchable part 200a is configured to maintain a flat shape in a part of the crotch region 25 when the disposable diaper 10 is attached to the wearer, rather than the other part of the absorber 40.
- the crotch stretchable portion 200a may be stretchable in the product longitudinal direction L, may be stretchable in the product width direction W, or stretchable in both the product longitudinal direction L and the product width direction W. It may be possible.
- the crotch stretchable part 200a is provided separately from the leg stretchable part 75 and overlaps the absorbent core 40a (in this embodiment, the core wrap 40b that wraps the absorbent core 40a and the back sheet 60. In the middle position), 60% or more of the length (natural state) of the absorbent core 40a in the product width direction W at the position is contracted.
- the absorbent core 40a contracts, and it is easy to maintain a flat shape as compared with the portion where the absorbent core 40a does not contract. Become.
- the absorbent core 40a located in the front waistline region 20 and the rear waistline region 30 located outside the product longitudinal direction L from the crotch stretch part 200a is not contracted by the crotch stretch part 200a.
- the crotch stretchable part 200a maintained in a flat shape in the crotch region 25 of the disposable diaper 10 in a state of being held around the waist and waist of the wearer by the fastening tape 90 without being in close contact with the body excessively, As a result, the crotch stretchable part 200a is appropriately disposed along the body.
- the crotch stretchable portion 200a is stretchable along the product longitudinal direction L, the front waistline region 20 and the back waistline region 30 are likely to rise due to the shrinkage of the crotch stretchable portion 200a.
- a flat crotch region can be formed along the body at the part.
- the disposable diaper 10 can be stably mounted so that the crotch region 25 of the disposable diaper 10 is disposed in the crotch region of the wearer by the contraction of the crotch stretchable part 200a.
- the crotch stretchable portion 200a is configured to be stretchable, so that a part of the crotch region 25 of the disposable diaper 10 contracts and the clothing side (non-skin contact) of the disposable diaper 10 Irregular wrinkles are formed on the surface of the contact side S2).
- the crotch stretchable part 200a is disposed so as to overlap at least the region where the absorbent body 40 is disposed across the center line O in the product width direction W of the disposable diaper 10.
- the crotch stretchable part 200a may be provided between the absorber 40 (core wrap 40b) and the backsheet 60.
- the crotch stretchable part 200a may be configured by a stretchable sheet.
- the absorbent core 40a in the region where the stretchable sheet is arranged is uniformly shrunk, and it becomes easier to maintain a flat shape.
- an elastic sheet can be comprised with the elastic sheet similar to the leg expansion-contraction part 75, for example.
- the stretchable sheet may be a stretchable film formed by melting a thermoplastic elastomer resin such as urethane or styrene, a stretchable nonwoven fabric made of stretchable fibers, a stretchable film or a stretchable nonwoven fabric.
- a composite sheet or the like obtained by laminating a non-stretchable sheet that has been cut or weakened can be used.
- the crotch stretchable portion 200a may be configured by arranging elastic members such as polyurethane elastic fibers or natural rubber that are stretchable in the form of threads or belts in parallel with each other.
- the thickness of the elastic member to be used and the pitch to be arranged can be appropriately selected. It is preferable that the entire side edge portion in the product width direction W of the absorbent core 40a is contracted when the stretched state is set.
- the interval between the elastic members is preferably 7 mm or less, and more preferably 5 mm or less.
- the expansion / contraction rate of the crotch expansion / contraction part 200a is preferably 1.2 times or more and 1.8 times or less.
- the expansion / contraction rate of the crotch expansion / contraction part 200a is set to 1.3 times.
- the expansion / contraction rate means the degree of expansion / contraction of the crotch expansion / contraction part 200a in the expansion / contraction direction (in the present embodiment, the product longitudinal direction L), and is defined as follows.
- Expansion rate (length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the maximum expansion state) / (length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the natural state)
- this expansion / contraction rate shall be measured as follows, for example.
- the disposable diaper 10 when the disposable diaper 10 is enclosed with the package etc., the disposable diaper 10 is taken out from a package, and it is 60 in the atmosphere of 20 degreeC +/- 2 degreeC and relative humidity 60% +/- 5% RH in the state. Let stand for a minute, and measure the length of the crotch expansion / contraction part 200a along the expansion / contraction direction. This length is defined as “the length of the crotch expansion / contraction portion 200a in the natural state”.
- the length in the stretch direction of the desired region in such a state ie, the natural state
- the elongation percentage is measured by calculating with the above formula.
- the expansion / contraction ratio of the crotch expansion / contraction part 200a is less than 1.2 times, the crotch expansion / contraction part 200a is not sufficiently contracted in the natural state, and the disposable diaper 10 is compared with the case where the crotch expansion / contraction part 200a is not provided.
- the shrinkage of the absorbent body arrangement region is small, and the crotch region 25 of the disposable diaper 10 becomes insufficient to take a flat shape along the body at the wearer's crotch region, so that the disposable diaper 10 becomes easy to shift from the wearer's body.
- the expansion ratio of the crotch expansion / contraction part 200a is larger than 1.8 times, the contraction dimension in the contraction direction of the crotch expansion / contraction part 200a becomes too large, so that the region where the crotch expansion / contraction part 200a exists is more than along the body.
- the disposable diaper 10 is likely to be in a close contact state, and easily displaced downward from the wearer.
- the shrinkage amount of the crotch stretchable part 200a in the product longitudinal direction L may be configured to be 2 to 8% of the length of the disposable diaper 10 in the product longitudinal direction L.
- the amount of shrinkage is the length “b (mm)” in a stretched state so that the wrinkles are sufficiently small and the surface of the sample is almost smooth, and in the natural state in the direction along the stretching direction of the sample. It is the difference from the length “a (mm)” and can be calculated by (b ⁇ a).
- the amount of shrinkage of the crotch stretchable part 200a in the product longitudinal direction L is 2 to 8% of the length of the disposable diaper 10 in the product longitudinal direction L, and the process of attaching the disposable diaper 10 to the wearer.
- the crotch stretchable part 200a can be confirmed to be easily along the wearer's body.
- the amount of shrinkage in the product longitudinal direction L of the crotch stretchable part 200a is larger than 8%, the crotch stretchable part 200a is shrunk too much, and the length in the product longitudinal direction L of the disposable diaper 10 is not sufficient, and is disposable. It becomes difficult to attach the diaper 10 to the wearer's body, or the disposable diaper 10 and the wearer's body are in close contact with each other in the crotch region 25 and are likely to be displaced.
- the amount of shrinkage of the crotch stretchable part 200a in the product longitudinal direction L is less than 2%, the effect itself of the crotch stretchable part 200a that brings the disposable diaper 10 closer to the wearer's body becomes difficult to manifest.
- the crotch stretchable part 200a is constituted by a stretchable sheet member having a width entering rate of 10% or less.
- this width-inclusive rate shall be measured as follows, for example.
- the crotch stretchable part 200a After removing the crotch stretchable part 200a from the disposable diaper 10 and leaving the removed crotch stretchable part 200a in an atmosphere of 20 ° C. ⁇ 2 ° C. and a relative humidity of 60% ⁇ 5% RH for 24 hours, the crotch stretchable part 200a
- the width of the position corresponding to the center in the product width direction W when the disposable diaper 10 is disposed is the sheet-like elastic element width (WA) in the natural state.
- the entire width of the removed waist stretchable part 100 is held on a measurement chuck of a tensile tester (manufactured by Shimadzu Corporation), and the width at the time of application to the disposable diaper 10 at a speed of 100 mm / min.
- the width (WB) of the position corresponding to the center in the product width direction W of the crotch expansion / contraction part 200a at the time of arrangement to the disposable diaper 10 is measured.
- the width ratio is calculated by the following formula.
- Width ratio (%) ((WA) ⁇ (WB)) / (WA)) ⁇ 100
- the center O2 of the crotch stretchable part 200a in the product longitudinal direction L is disposed closer to the front waistline region 20 than the center O1 of the disposable diaper 10 in the product longitudinal direction L.
- the crotch expansion-contraction part 200a is arrange
- the crotch stretchable part 200a is formed at a position including the center O1 of the disposable diaper 10 in the product longitudinal direction L.
- the length (natural state) of the rear waistline region 30 in the product longitudinal direction L is configured to be longer than the length (natural state) of the front waistline region 20 in the product longitudinal direction L.
- the ratio of the length of the rear waistline region 30 in the product longitudinal direction L (natural state) to the length of the front waistline region 20 in the product longitudinal direction L (natural state) is 1.1 or more and 1.6. It is preferable to be configured as follows, and more preferable to be configured to be 1.2 or more and 1.5 or less.
- the wearer's body is generally in a state in which the buttock protrudes more than the lower abdomen, the crotch stretchable part 200a and the wearer's crotch are combined, and the above-mentioned By setting the ratio within the above-described range, the disposable diaper 10 becomes a more suitable shape with respect to the complicated shape of the wearer's body.
- the body in the case of an infant used before starting walking or when walking is started, it is preferable that the body takes a posture that is curled toward the abdomen. In such a posture, the skin on the buttocks side is stretched.
- the above-mentioned ratio By setting the above-mentioned ratio to the above-mentioned range, it becomes a state suitable for an infant's body that easily takes such a posture.
- the front waistline region 20 is set to 130 mm (the length of the natural state in the product longitudinal direction L)
- the crotch part 200 is set to 80 mm (length in the natural state in the product longitudinal direction L)
- the rear waistline region 30 is set to 190 mm (length in the natural state in the product longitudinal direction L).
- the ratio of the length (natural state) between the front waistline region 20 and the back waistline region 30 is about 1.46.
- the position of the crotch expansion / contraction portion 200a in the front-rear direction is determined, so that the disposable diaper 10 can be correctly fitted to the wearer's body and the design of the disposable diaper 10 can be interlocked. Aim can be realized more reliably.
- the crotch stretchable part 200a Since the crotch stretchable part 200a is in a contracted state, the crotch stretchable part 200a is disposable to the wearer because the crotch stretchable part 200a is different from the non-contracted state in the absorber placement region on the front waistline region 20 side and the back waistline region 30 side. When the diaper 10 is worn, it becomes easy to attach the crotch stretchable part 200a to the wearer's crotch.
- the rigidity or thickness of the part is equal to the rigidity or thickness of the part of the other absorbent core 40a. Since it becomes different, it becomes easy for a wear assistant to recognize the site
- the crotch stretchable part 200a maintains a flat shape at the wearer's crotch, and the disposable diaper 10 itself becomes a three-dimensional shape, so that the inseam area of the disposable diaper 10 25 can be placed along the crotch of the wearer, so that it is more certain that the crotch region 25 of the disposable diaper 10 and the crotch of the wearer are matched and worn.
- the length W5 (natural state) in the product width direction W at the center position O2 of the crotch expansion / contraction part 200a in the product longitudinal direction L is at the end of the crotch expansion / contraction part 200a in the product longitudinal direction L. You may comprise so that it may become shorter than the length W6 (natural state) of the product width direction W.
- the wear assistant wears the disposable diaper 10 on the wearer.
- the crotch stretchable part 200a is mounted so as to be disposed at the crotch part of the wearer, and it can be visually confirmed that the mounting position is correct.
- the second sheet 51 is disposed so as to overlap the region where the crotch stretchable part 200a is disposed.
- a portion where the absorbent core 40a hangs down is not provided in the wearer's crotch, and as a result, the diffusibility of the excrement A of the second sheet 51 in the region overlapping the crotch stretchable portion 200a can be enhanced.
- the second sheet 51 overlaps with the crotch expansion / contraction part 200a, so that the overlapping region contracts and wrinkles are likely to occur.
- the second sheet 51 is composed of crosslinked cellulose fibers, so that the number of hydrogen bonds between the fibers in the second sheet 51 is less than that in the case where ordinary cellulose fibers are used.
- the freedom degree of the fiber in 51 can be raised.
- a notch 110 and a notch 120 are formed in the crotch region 25 of the absorber 40.
- the notch part 110 and the notch part 120 are areas where the absorbent core 40 a constituting the absorber 40 does not exist.
- the notch part 110 and the notch part 120 correspond to a low-rigidity part in which the basis weight of the absorbent core 40a is lower than that of the other absorbent cores 40a.
- the notch part 110 and the notch part 120 are formed along the edge part in the product longitudinal direction L of the crotch expansion-contraction part 200a.
- the absorbent core 40a located in the front waistline region 20 and the rear waistline region 30 and the absorbent core 40a located in the crotch region 25 are It is preferably continuous without being completely separated, and particularly preferably continuous in the product width direction W.
- the notch part 110 and the notch part 120 are configured such that the length in the product longitudinal direction L (natural state) becomes longer as going outward in the product width direction W.
- Such a shape makes it easier for the outer side of the absorbent core 40a in the product width direction W to shrink, so that a flat “bottom” can be formed in the disposable diaper 10.
- the absorbent core 40a located on the front waistline region 20 side with respect to the notch portion 110 and the absorbent core 40a located on the rear waistline region 30 side with respect to the notch portion 120 rise from a flat “bottom”, Since it becomes easy to curve along the roundness of the body (abdomen and buttocks), the shape of the disposable diaper 10 itself can be closer to the shape of the wearer's body.
- the edge on the front waistline region 20 side of the notch 110 and the edge on the back waistline 30 side of the notch 120 may be arcuate.
- the edge of the notch portion 110 on the front waistline region 20 side is shaped such that the center of the arc is located on the rear waistline region 30 side of the edge, and the rear waistline region of the notch portion 120
- the edge part on the 30th side has such a shape that the center of the arc is located closer to the front waistline region 20 side than the edge part.
- the edge of the notch 110 on the front waistline region 20 side in the product longitudinal direction L constitutes a first inflection portion 115, and the edge of the notch 120 on the product waist direction L in the product waistline region 30 side is the second The inflection part 125 is configured.
- the 1st inflection part 115 and the 2nd inflection part 125 are extended along the product width direction W, and are comprised so that it may become a bending base point of the disposable diaper 10.
- FIG. 1st inflection part 115 and the 2nd inflection part 125 are extended along the product width direction W, and are comprised so that it may become a bending base point of the disposable diaper 10.
- the notch part 110 and the notch part 120 are formed to make the first inflection part 115 and the second inflection part 125 better.
- the crotch expansion / contraction part 200a is configured not to be interlocked with the movement of the waistline holding part (that is, the front waistline area 20, the back waistline area 30 and the fastening tape 90 constituting the waistline holding part).
- the crotch stretchable part 200a in the natural state, may be bilaterally symmetric across the center line O in the product width direction W, or in the product width direction.
- the difference between the left and right widths of the crotch stretchable part 200a may be within 10% with the center line O of W as a boundary.
- the crotch stretchable part 200a can be put on the wearer's crotch part across the center of the wearer's body.
- the crotch stretchable part 200a is provided separately from the above-described waistline holding part and the elastic member 71.
- a non-stretchable region is provided on the front waistline region 20 side and the back waistline region 30 side in the product longitudinal direction L of the crotch stretchable part 200a.
- the length of the product width direction W of the absorptive core 40a becomes short toward the crotch area 25 from the front waist area 20, and a back waist area It is configured to be shortened from 30 toward the crotch region 25.
- the crotch stretchable part 200a is provided in a region where the length of the absorbent core 40a in the product width direction W is shorter than a predetermined length.
- the predetermined length is the length in the product width direction W of the absorbent core 40a in a region where the length in the product width direction of the front waistline region 20 and the rear waistline region 30 is long.
- the absorption capacity per unit length (for example, per 10 mm) in the product longitudinal direction L is different, and the area that is shorter than the predetermined length has a smaller absorption capacity.
- a flat “bottom” is formed in the crotch of the wearer by the crotch stretchable part 200a. That is, the disposable diaper 10 can maintain an appropriate space with the wearer, and even after absorbing the excrement A, the disposable diaper 10 does not hang down at the wearer's crotch.
- the diffusion of the excrement A taken into the second sheet 51 is less affected by gravity compared to the case where the disposable diaper 10 hangs down.
- the diffusion of the object A is preferably performed.
- the absorbent body 40 including the second sheet 51 is not in close contact with the wearer's body, and the second sheet 51 is pressurized by the close contact. Therefore, the uptake rate of the excrement A in the second sheet 51 is also suitable.
- the crotch expansion / contraction part 200 a is provided away from the waistline holding part 150 without intersecting with the waistline holding part 150.
- the length of the crotch stretchable part 200a in the product width direction W is 1 ⁇ 2 or more of the length of the absorbent core 40a in the product width direction W in the region where the crotch stretchable part 200a exists.
- the absorbent core 40a contracts and the absorbent core 40a is lifted so as to approach the wearer's body.
- the gap between the disposable diaper 10 and the wearer can be further reduced.
- the portion where the absorbent core 40a is not disposed becomes the absorbent core.
- the disposable diaper 10 is mounted in a contracted state with respect to the portion where 40a is disposed.
- the product width of the crotch stretchable part 200a is 120 mm
- the product width of the crotch stretchable part 200a is preferably 60 to 110 mm, and more preferably 90 to 110 mm.
- the portion having the narrowest length in the product width direction W of the absorbent core 40a is preferably provided 10 to 60 mm in front of the center line in the product longitudinal direction L.
- the portion having the narrowest length in the product width direction W of the absorbent core 40a is provided on the front side of the product longitudinal direction L by 20 to 40 mm.
- the crotch stretchable part 200a is preferably formed so as to straddle the part where the length in the product width direction W of the absorbent core 40a is the narrowest.
- the position where the left and right thighs of the wearer are closest to each other is the front side of the center of the wearer's body in the front-rear direction. Therefore, by the contraction force of the crotch expansion / contraction part 200a, the part where the length of the absorbent core 40a in the product width direction W is the narrowest can be positively arranged at the position where the left and right thighs of the wearer are closest to each other. it can. In other words, even if a wear assistant such as a mother does not align the absorbent core 40a, the absorbent core 40a is naturally aligned.
- the ratio (weight) of the fiber contained in the absorptive core 40a it is more preferable that it is 10% or less.
- the liquid uptake rate of the absorbent polymer is lower than the uptake rate of excreta into the second sheet 51, so that leakage is prevented.
- the arrangement of the second sheet 51 and the crotch expansion / contraction part 200a secures the excrement holding space by keeping the disposable diaper 10 in close contact with the wearer's body while increasing the fluid intake speed and diffusibility of the excrement. By doing so, it is possible to realize a disposable diaper 10 that is thinner, more flexible, and less likely to leak.
- a dart portion is formed at the edge in the product longitudinal direction L instead of the crotch stretchable portion 200a configured to be stretchable at least in the product longitudinal direction L.
- a crotch portion may be used.
- the dart portion is configured to pick a part of the back sheet 60 in order to make the crotch portion a flat “bottom”.
- the crotch expansion / contraction part 200a is configured by a reinforcing sheet instead of the crotch expansion / contraction part 200a configured to be expandable / contractable at least in the product longitudinal direction L as in the case of the first embodiment described above.
- a crotch portion may be used.
- the second sheet 51 may be configured to extend beyond the end of the crotch stretchable part 200a in the product longitudinal direction L in the product longitudinal direction L.
- the inflection state of the first inflection portion 115 and the second inflection portion 125 formed by the crotch expansion / contraction portion 200a can be made to be a gentle and rounded appearance.
- the wearer does not feel discomfort due to the first inflection part 115 and the second inflection part 125.
- the absorption retention function and diffusion function of the second sheet provided between the absorbent body and the top sheet can be expressed more preferably. As a result, the amount of excretory fluid present in the space between the wearer and the disposable diaper is reduced, and the second sheet is worn.
- the disposable diaper which can suppress the leakage of the excretion fluid to the exterior resulting from a person's movement can be provided.
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Abstract
Description
また、図1に示すように、一対のレッグ伸縮部75の内側(製品幅方向Wにおける中央寄り)には、製品長手方向Lに沿って延びる一対のレッグサイドギャザー80が備えられていてもよい。
また、使い捨ておむつ10は、後胴回り域30に形成され、製品幅方向Wに伸縮可能なウェスト伸縮部100を備えていてもよい。
ここで、吸収体40は、後胴回り域30において、吸収体40の他の部位よりも目付けが低い又は吸収性コア40aが存在しない低剛性領域210を有する。
本実施形態における曲げ剛性は、テーバー法(JISP8125)に準拠した剛性値に基づいており、以下の方法によって測定される。
なお、試験片の幅が38mmを採取できない場合には、38mm幅の曲げモーメントへ換算を行う。
ファスニングテープ90は、後胴回り域30に対応するサイドフラップ70の領域に取り付けられている。
レッグ伸縮部75は、吸収体40よりも製品幅方向Wの外側に設けられた脚回り開口部35に沿って配置され、製品長手方向Lに伸縮可能に構成されている。
なお、かかる測定は、シンワ測定株式会社製スプリングメジャー(テープ部:ガラス繊維入り塩ビ被覆)を用いて、測定対象部位に沿わせるようにして行った(10サンプル)。
なお、本明細書において、かかる伸縮率は、例えば、次のように測定されるものとする。
次に、クロッチ伸縮部200aの形状について説明する。
なお、本明細書において、かかる伸縮率は、例えば、次のように測定されるものとする。
また、製品長手方向Lにおけるクロッチ伸縮部200aの中心O2は、製品長手方向Lにおける使い捨ておむつ10の中心O1よりも、前胴回り域20側に配置されている。また、クロッチ伸縮部200aは、製品長手方向Lにおける使い捨ておむつ10の中心O1を跨ぐように配置されている。
上述の第1の実施形態の場合のように、少なくとも製品長手方向Lに伸縮可能となるように構成されているクロッチ伸縮部200aの代わりに、製品長手方向Lにおける縁部にダーツ部が形成されているクロッチ部が用いられてもよい。
20…前胴回り域
25…股下域
30…後胴回り域
35…脚回り開口部
40…吸収体
40a…吸収性コア
40b…コアラップ
50…トップシート
51…セカンドシート
60…バックシート
61…防漏シート
70…サイドフラップ
71…弾性部材
75…レッグ伸縮部
80…レッグサイドギャザー
81…接合部分
82…自由端部分
90…ファスニングテープ
90a…ターゲット部
100…ウェスト伸縮部
200…クロッチ部
200a…クロッチ伸縮部
Claims (8)
- 前胴回り域と、後胴回り域と、前記前胴回り域と前記後胴回り域との間に位置する股下域と有し、
一対の脚回り開口部が形成されると共に、
前記股下域を跨ぎ前記前胴回り域及び前記後胴回り域の少なくとも一方に向かって延びる吸収体を備え、
前記前胴回り域から前記後胴回り域に向かう製品長手方向と、前記製品長手方向と直交する製品幅方向とを有する使い捨ておむつであって、
前記前胴回り域及び前記後胴回り域において、前記製品幅方向に沿って延び、前記使い捨ておむつを着用者の身体に保持するように構成されている胴回り保持部と、
前記股下域に形成され、少なくとも前記製品長手方向に伸縮可能なクロッチ伸縮部とを備え、
前記クロッチ伸縮部は、前記使い捨ておむつの前記製品幅方向の中心線を跨いで、少なくとも前記吸収体が配置されている領域と重なるように配置されており、
前記クロッチ伸縮部は、前記胴回り保持部と交差することなく前記胴回り保持部から離れて備えられ、
前記吸収体よりも前記使い捨ておむつの肌当接面側に、液透過性のトップシートが備えられており、
前記トップシートと前記吸収体との間に、前記トップシートよりも嵩高な液透過性のセカンドシートが備えられており、
前記セカンドシートは、前記クロッチ伸縮部が配置されている領域に重なるように配置されていることを特徴とする使い捨ておむつ。 - 前記クロッチ伸縮部の前記製品長手方向における縁部に沿って、前記吸収体を構成する吸収性コアの目付が他の領域よりも低い領域、或いは、前記吸収性コアが存在しない領域が形成されていることを特徴とする請求項1に記載の使い捨ておむつ。
- 前記クロッチ伸縮部は、幅入り率が10%以下の伸縮性シート部材によって構成されていることを特徴とする請求項1又は2に記載の使い捨ておむつ。
- 前記セカンドシートは、前記製品長手方向において、前記クロッチ伸縮部の前記製品長手方向の端部を超えて延びるように構成されていることを特徴とする請求項1乃至3のいずれか一項に記載の使い捨ておむつ。
- 前記クロッチ伸縮部は、前記吸収体の非肌当接面側に設けられており、
前記セカンドシートは、架橋セルロース繊維を含むことを特徴とする請求項1乃至4のいずれか一項に記載の使い捨ておむつ。 - 前記製品長手方向における前記クロッチ伸縮部の中央位置における前記製品幅方向の自然状態の長さは、前記製品長手方向における前記クロッチ伸縮部の端部における前記製品幅方向の自然状態の長さよりも短くなるように構成されていることを特徴とする請求項1乃至5のいずれか一項に記載の使い捨ておむつ。
- 前記吸収体を構成する吸収性コア中に含まれる繊維の重量比率は、20%以下であることを特徴とする請求項1乃至6のいずれか一項に記載の使い捨ておむつ。
- 前記クロッチ伸縮部の製品幅方向Wにおける長さは、前記クロッチ伸縮部が存在する領域内の前記吸収体の製品幅方向Wにおける長さの1/2以上であることを特徴とする請求項1乃至7のいずれか一項に記載の使い捨ておむつ。
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KR1020147017651A KR101453251B1 (ko) | 2012-11-27 | 2013-11-27 | 일회용 기저귀 |
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SA515360491A SA515360491B1 (ar) | 2012-11-27 | 2015-05-27 | حفاضة تُستخدم لمرةً واحدة |
SA516370469A SA516370469B1 (ar) | 2013-07-26 | 2016-01-25 | حفاضة يتم استخدامها لمرة واحدة |
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JP5615457B1 (ja) * | 2014-06-23 | 2014-10-29 | ユニ・チャーム株式会社 | 使い捨ておむつ |
JP2016007516A (ja) * | 2014-06-30 | 2016-01-18 | ユニ・チャーム株式会社 | 使い捨ておむつ |
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WO2016092708A1 (ja) * | 2014-12-12 | 2016-06-16 | 山田 菊夫 | 使い捨て衣類及び吸収体 |
JP7083489B2 (ja) * | 2018-08-14 | 2022-06-13 | ユニ・チャーム株式会社 | 使い捨ておむつ |
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CN104066408B (zh) | 2016-02-24 |
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CN104066408A (zh) | 2014-09-24 |
SA515360491B1 (ar) | 2018-11-18 |
JP5588498B2 (ja) | 2014-09-10 |
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