CN107106378B - Absorbent article - Google Patents

Absorbent article Download PDF

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Publication number
CN107106378B
CN107106378B CN201580071205.1A CN201580071205A CN107106378B CN 107106378 B CN107106378 B CN 107106378B CN 201580071205 A CN201580071205 A CN 201580071205A CN 107106378 B CN107106378 B CN 107106378B
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China
Prior art keywords
region
absorbent article
folding line
waistline region
width
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Active
Application number
CN201580071205.1A
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Chinese (zh)
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CN107106378A (en
Inventor
加藤伸亨
姚旭光
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Unicharm Corp
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Unicharm Corp
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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
    • 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

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

An absorbent article (1) comprises: a front waistline region (S1), a rear waistline region (S2), and an absorber (13). The absorbent article is folded with a first width folding line (FW1) extending in the width direction of the absorbent article as a base point, and the outer edge of the front waistline region and the outer edge of the rear waistline region are joined together. The absorbent article is folded with a second width folding line (FW2) extending in the width direction of the absorbent article as a base point in a state where the outer edge of the front waistline region and the outer edge of the rear waistline region are joined, and the thickness of the absorbent body changes with the second width folding line (FW2) as a boundary.

Description

Absorbent article
Technical Field
The present invention relates to an absorbent article.
Background
Absorbent articles have been reduced in size to facilitate carrying and storage. In particular, absorbent articles such as pants-type sanitary napkins and disposable diapers are highly desired to be downsized because the absorbent articles have a larger volume than sanitary napkins attached to underwear. Under such a background, an absorbent article packaged in a folded state is provided (patent document 1). The absorbent article of patent document 1 is folded with a fold line extending in the width direction as a base point and stored in a packaging material (fig. 1 and 2 of patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2000-42029
However, the absorbent article described above has the following problems.
The fold line of the absorbent article extends in the width direction and is formed across the absorbent body. Generally, the thickness of the absorbent body is larger than the thickness of other members constituting the absorbent article. Since the fold line is formed across the absorbent body, the thickness does not change before and after the fold line, and therefore, the absorbent article is difficult to fold. Further, the position of the fold line is difficult to stabilize, and the size of the absorbent article in the folded state may vary. And the absorbent article cannot be folded in a stable position for miniaturization.
Disclosure of Invention
Problems to be solved by the invention
In view of the above problems, an object of the present invention is to provide an absorbent article that can be folded at a stable position and is miniaturized.
Means for solving the problems
The present invention is embodied in an absorbent article in one aspect, and the absorbent article in one aspect of the present invention includes: a front waistline region that faces a wearer's crotch region and extends forward from the crotch region; a rear waistline region which is disposed on the rear side of the front waistline region, faces the crotch region of the wearer, and extends rearward from the crotch region; and an absorber that is disposed so as to straddle the front waistline region and the rear waistline region, wherein an outer edge of the front waistline region and an outer edge of the rear waistline region are joined together in a state in which the absorber is folded with a first width folding line extending in the width direction of the absorbent article as a base point, and the absorber is folded with a second width folding line extending in the width direction of the absorbent article as a base point in a state in which the outer edge of the front waistline region and the outer edge of the rear waistline region are joined together, and wherein the thickness of the absorber changes with the second width folding line as a boundary.
Drawings
Fig. 1 is a front view of a pants-type sanitary napkin according to an embodiment of the present invention.
Fig. 2 is an expanded plan view of a pants-type sanitary napkin according to an embodiment of the present invention.
Fig. 3 is a schematic sectional view of the section a-a shown in fig. 2.
Fig. 4 is a schematic sectional view of the section B-B shown in fig. 2.
Fig. 5 is a plan view of the absorbent main body.
Fig. 6 is a view for explaining a folding manner of the absorbent article.
Fig. 7 is a view for explaining a folding mode of an absorbent article according to another embodiment of the present invention.
Detailed Description
(1) Unitary structure of absorbent article
The overall structure of an absorbent article according to an embodiment of the present invention will be described with reference to fig. 1 to 5. The absorbent article 1 of the present embodiment is a pants-type sanitary napkin 1 formed in advance in a pants-type configuration. The absorbent article is not limited to a pants-type sanitary napkin, and may be a disposable diaper. The pants-type sanitary napkin 1 may be a pants-type sanitary napkin for night use or a pants-type sanitary napkin for daily use.
Fig. 1 is a front view of a pants-type sanitary napkin 1 according to the present embodiment. Fig. 2 is an expanded plan view showing a state after the pants-type sanitary napkin 1 shown in fig. 1 is expanded. The developed plan view shown in fig. 2 is a view in which the stretchable member is stretched to a stretched state in which no gathers are formed on the main body top sheet 11, the main body back sheet 14, and the like constituting the pants-type sanitary napkin 1. Fig. 3 is a sectional view taken along line a-a of fig. 2. Fig. 4 is a B-B sectional view shown in fig. 2. Fig. 5 is a plan view of the absorbent main body 10.
The pants-type sanitary napkin 1 has: a front waistline region S1 that faces the wearer' S crotch region and extends forward from the crotch region; and a rear waistline region S2 which is disposed on the rear side of the front waistline region, faces the crotch region of the wearer, and extends rearward from the crotch region. The front waistline region S1 is a region on the front side of the center 1LC of the pants-type sanitary napkin 1 in the front-rear direction L, and the rear waistline region S2 is a region on the rear side of the center 1LC of the pants-type sanitary napkin 1 in the front-rear direction L.
The pants-type sanitary napkin 1 has a front-back direction L extending toward the front and back of the body of the wearer, a width direction W perpendicular to the front-back direction, a skin-facing surface side T1 facing the wearer, and a thickness direction T extending toward a non-skin-facing surface side T2 opposite to the skin-facing surface side.
The pants-type sanitary napkin 1 includes an absorbent main body 10, and a base sheet 20. The absorbent main body 10 includes a liquid-permeable main body top sheet 11, a liquid-impermeable main body film 12, an absorbent body 13 disposed between the main body top sheet 11 and the main body film 12, and a main body back sheet 14. The base sheet 20 is disposed on the non-skin-facing surface side T2 of the absorbent main body 10, and includes an outer topsheet 21 and an outer backsheet 22.
The absorbent article is folded from the state shown in fig. 2 so that the front waistline region S1 and the rear waistline region S2 overlap each other with a first width folding line FW1 extending in the width direction of the absorbent article as a base point, and the outer side edge (outer side end in the width direction) of the front waistline region S1 and the outer side edge of the rear waistline region S2 are joined together to form the pants-type sanitary napkin shown in fig. 1. The outer bonds 29 for joining the outer side edges of the front waistline region S1 and the outer side edges of the back waistline region S2 are shown in fig. 1 and 2. The outer joint portions 29 of the front waistline region S1 are front outer joint portions 291, and the outer joint portions 29 of the rear waistline region S2 are rear outer joint portions 292. In the present embodiment, the first width folding line FW1 is aligned with the center 1LC of the pants-type sanitary napkin 1 in the front-rear direction L, but the first width folding line FW1 may be offset from the center 1LC of the pants-type sanitary napkin 1 in the front-rear direction L.
The main body top sheet 11 is positioned closer to the skin-facing surface side T1 than the absorber 13. The main body top sheet 11 may be a liquid-permeable sheet such as a nonwoven fabric or an apertured plastic film.
The main body film 12 is disposed on the non-skin surface side T2 with respect to the absorbent body 13 and on the skin surface side T1 with respect to the base sheet 20. A liquid impermeable sheet or the like can be used as the main body film 12.
The absorber 13 is provided between the main body top sheet 11 and the main body film 12, and absorbs excrement from the wearer. The absorber 13 is disposed so as to span the front waistline region S1 and the rear waistline region S2. As the absorber 13, a mixture of pulverized pulp and super absorbent polymer particles or the like can be used. The average weight per unit area of the pulp was 100g/m2～800g/m2The average weight per unit area of the superabsorbent polymer particles is 0g/m2～100g/m2. The absorbent body 13 may be an air-laid sheet formed into a sheet shape.
In the present embodiment, the weight per unit area of the absorber is not constant. The absorbent body 13 has a low basis weight region 16 (see fig. 5) having a lower basis weight than the basis weight of other portions of the absorbent body. The low basis weight region 16 may be configured such that the basis weight of the absorbent material is lower than the basis weight of the other portions of the absorbent body, or may be a slit (basis weight of 0) in which no absorbent material is disposed. The low basis weight region 16 is located on the rear side of the center 1LC in the front-rear direction of the pants-type sanitary napkin and extends inward in the width direction W from the outer edge of the absorbent body 13.
The absorber 13 is provided with a high basis weight region 17 having a higher basis weight than the surrounding region in a region sandwiched between a pair of crotch compressing portions 81 described later. The absorbent body 13 has a region 18 of lower basis weight than the high basis weight region 17 and higher basis weight than the low basis weight region 16. The basis weight of the unit area weight region is lower than the basis weight of other portions (regions other than the low basis weight region, the unit area weight region, and the high basis weight region) of the absorbent body 13. The middle area weight region 18 is provided on the front side of the high area weight region and on the rear side of the pair of crotch compression parts 81. In the present embodiment, the high basis weight region has a basis weight of 600g/m2The weight per unit area in the low weight per unit area region was 0g/m2Wherein the weight per unit area in the area of the unit area weight is 150g/m2The basis weight of the other portions (regions other than the low basis weight region, the medium basis weight region, and the high basis weight region) of the absorbent body 13 was 300g/m2. The front end edge of the high basis weight region 17 is aligned with the rear end edge of the middle basis weight region 18 positioned on the front side, and is aligned with the rear end edge of the front side exterior topsheet 24 described later. The rear end edge of the high basis weight region 17 is positioned on the front side of the center 1LC of the pants-type sanitary napkin 1 in the front-rear direction L. In addition, the weight per unit area of the absorbent body 13 may be constant. In fig. 5, the high area weight region 17 and the medium area weight region 18 are indicated by diagonal lines.
The main body back sheet 14 is disposed on both the non-skin-facing surface side T2 of the main body film 12 and the skin-facing surface side T1 of the main body top sheet 11. The center portion in the width direction W of the main chassis 14 is disposed on the non-skin-facing surface side T2 of the main body film 12. The portion of the chassis base sheet 14 located outside the central portion in the width direction W is folded back inward in the width direction W from the outer edge of the body film 12 as a starting point and is disposed on the skin-facing surface side T1 of the chassis top sheet 11. The main body bottom sheet 14 may be a sheet such as a nonwoven fabric.
The pants-type sanitary napkin 1 is formed with a waist opening 31 through which the waist of the wearer is inserted, and a pair of leg openings 32 through which the legs of the wearer are inserted. The waist opening 31 is defined by the front end edge 20F of the base sheet 20 and the rear end edge 20R of the base sheet 20. The portion of the leg hole openings 32 located on the inner side in the width direction is located on the front side of the center 1LC in the front-rear direction of the pants-type sanitary napkin 1.
The base sheet 20 has an outer top sheet 21 and an outer bottom sheet 22. The length of the outer-covering top sheet 21 and the length of the outer-covering bottom sheet 22 in the width direction W constituting the base sheet 20 are longer than the length of the absorbent main body 10 in the width direction W.
The outer-covering top sheet 21 is made of a nonwoven fabric having stretchability at least in the width direction W. The outer back sheet 22 is disposed on the non-skin-facing surface side T2 of the outer top sheet 21. The outer bottom sheet 22 is made of a non-stretchable nonwoven fabric.
The exterior topsheet 21 has a front side exterior topsheet 24 positioned on the front waistline region S1 side and a back side exterior topsheet 25 positioned on the back waistline region S2 side. The front side exterior topsheet 24 and the back side exterior topsheet 25 are separated in the front-back direction L. The outer chassis 22 is provided so as to straddle the front waistline region S1 and the rear waistline region S2. The region where the front side exterior topsheet 24 is disposed and the region where the rear side exterior topsheet 25 is disposed are stretchable regions having stretchability in the width direction W. The front outer topsheet 24 may be disposed at least partially in the front waistline region S1. The rear outer topsheet 25 may be disposed at least partially in the rear waistline region S2. In addition, a planar compressed portion, which will be described later, is formed in a portion of the absorbent body 13 that overlaps the stretchable region. In the present embodiment, the state where two members are overlapped includes not only a state where two members are in contact with each other and overlapped but also a state where another member is disposed between two members and the two members are indirectly overlapped.
The front outer topsheet 24 and the outer backsheet 22 are folded back toward the rear side at the front end edge 20F of the base sheet 20. A waist stretchable member 26 is disposed in a folded portion of the front outer topsheet 24 and the outer backsheet 22.
The rear outer topsheet 25 and the outer backsheet 22 are folded back toward the front side at the rear end edge 20R of the base sheet 20. A waist stretchable member 26 is disposed in a folded portion of the rear side outer cover sheet 25 and the outer cover sheet 22.
A leg stretchable member 27 is disposed between the rear side exterior top sheet 25 and the exterior back sheet 22.
The absorbent main body 10 has a compressed portion 80 formed by compressing the main body top sheet 11 and the absorbent body 13 in the thickness direction. Since the compressed portion 80 is formed, the body fluid discharged to the main body top sheet 11 can be quickly absorbed into the absorbent body 13 through the main body top sheet 11. The compressed portion 80 may be formed by compressing at least the absorbent body 13 in the thickness direction.
The compression unit 80 includes a crotch compression unit 81 extending in the front-rear direction L from the center 1LC in the front-rear direction of the absorbent article 1, a dot-like compression unit 82 located on the rear side of the crotch compression unit 81 and spaced apart from the crotch compression unit 81, a pair of front-side outer compression units 84 extending in the front-rear direction L, a pair of rear-side outer compression units 85 extending in the front-rear direction L, a planar front-side-like compression unit 86 disposed at the front end edge of the absorbent body 13, and a planar rear-side-like compression unit 87 disposed at the rear end edge of the absorbent body 13.
The interval between the pair of crotch compressed parts 81 becomes shorter toward the rear end edge 81R of the crotch compressed part 81 and becomes shorter toward the front end edge 81F of the compressed part 80. The pair of crotch compressing units 81 are connected to each other at the front end edge 81F of the crotch compressing unit 81 and at the rear end edge 81R of the crotch compressing unit 81. Therefore, in the present embodiment, the pair of crotch compressing units 81 are integrated and have a ring shape in a plan view. The pair of crotch compressing units 81 may be disposed separately or may not be annular in plan view.
The crotch compression part 81 has a region continuous in the front-back direction L and a region discontinuous in the front-back direction L. The absorbent body and the like are not compressed in the thickness direction in the region discontinuous in the front-rear direction L. The crotch compressing portion 81 may have a region that is not partially compressed, or may be continuous in the front-rear direction L. In addition, no compressed portion extending in the width direction W is formed in the region surrounded by the pair of crotch compressed portions 81.
The rear end edge 81R of the crotch compression part 81 is positioned further to the front side than the front end edge 292F of the rear outer joint part 292. The front end edge 81F of the crotch compression part 81 is positioned on the front side of the rear end edge 291R of the front outer joining part 291.
The low basis weight region 16 is formed outside the rear end edge 81R of the crotch compression portion 81 in the width direction W. In the present embodiment, the low basis weight regions 16 are formed on both outer sides in the width direction W of the rear end edge 81R of the crotch compression unit 81. The low area weight region 16 is located on the front side of the rear outer joint portion 292. The low area weight region 16 extends inward in the width direction W, and the direction in which the low area weight region 16 extends is inclined with respect to the width direction W. More specifically, the low area weight region 16 extends rearward toward the inside in the width direction W.
The dot-shaped compressed portion 82 is a compressed portion in a dot shape in a plan view. The respective linear compression portions 82 are disposed at intervals. The dot-shaped compressed parts 82 are formed not in the center of the absorbent body 13 in the width direction W but at both outer ends of the absorbent body 13 in the width direction W.
A pair of front outer compressing units 84 and a pair of rear outer compressing units 85 are formed outside the crotch compressing unit 81 in the width direction W. The front outer compression unit 84 is separated from the crotch compression unit 81. The rear outer compression section 85 is separated from the crotch compression section 81 and from the point compression section 82.
The front side surface-like compressed portion 86 is formed within a certain range extending rearward from the front end edge of the absorber 13. In fig. 2, the region where the front-side-face-shaped compressed portion 86 is formed is indicated by hatching. The rear end edge of the front side-shaped compressed part 86 is located forward of the front outer compressed part 84, rearward of the front end edge 81F of the crotch compressed part 81, and forward of the high unit area weight region 17. The front side-shaped compressed portion 86 extends over the entire width W of the absorbent body 13, and the absorbent body 13 is compressed in the thickness direction at the portion of the entire region marked with diagonal lines in fig. 2. Therefore, the thickness of the portion of the absorbent body 13 in the region where the front-side-shaped compressed portions 86 are formed is smaller than the thickness of the portion of the absorbent body 13 in the region adjacent to the region where the front-side-shaped compressed portions 86 are formed on the rear side. In the present embodiment, the planar compression portions (the front side planar compression portion 86 and the rear side planar compression portion 87) are formed by a thermo-embossing roller. The planar compression portion is not a point-like or linear compression portion, but a compression portion in which the entire surface having a certain range is compressed in a plan view.
The rear-side-face-shaped compressed portion 87 is formed in a certain range extending forward from the rear end edge of the absorber 13. In fig. 2, the region where the rear-side-shaped compressed part 87 is formed is indicated by hatching. The front end edge of the rear-side-face-shaped compressed portion 87 is located rearward of the rear end edge 81R of the crotch compressed portion 81 and rearward of the rear end edge of the medium area weight region 18. Like the point-like compressed portions, the rear-side-like compressed portions 87 are formed not at the center portion in the width direction W of the absorbent body 13 but at both outer end portions in the width direction W of the absorbent body 13. The dot-shaped compressed parts 82 are formed in the regions where the rear-side-shaped compressed parts 87 are formed. The absorbent body 13 is compressed in the thickness direction at the portion of the entire region marked with diagonal lines in fig. 2. Therefore, the thickness of the portion of the absorbent body 13 in the region where the rear-side-shaped compressed portions 87 are formed is smaller than the thickness of the portion of the absorbent body 13 in the region adjacent to the region where the rear-side-shaped compressed portions 87 are formed on the front side.
The rear end edge of the front side-shaped compressed portion 86 and the front end edge of the rear side-shaped compressed portion 87 are aligned with a second width folding line FW2 (see fig. 4 and 6) described later. In the present embodiment, the state in which the rear end edge of the front-side-shaped compressed portion 86 and the second width folding line FW2 are aligned and the state in which the front end edge of the rear-side-shaped compressed portion 87 and the second width folding line FW2 are aligned include not only a state in which the positions in the front-rear direction L are aligned without being displaced but also a concept in which the displacement in the front-rear direction L is 20mm or less. The thickness of the portion of the front waistline region S1 on the front side of the second width folding line FW2 is different from the thickness of the portion on the rear side of the second width folding line FW2 and is smaller than the thickness of the portion on the rear side of the second width folding line FW 2. The thickness of the portion of the rear waistline region S2 on the rear side of the second width folding line FW2 is different from the thickness of the portion on the front side of the second width folding line FW2 and is smaller than the thickness of the portion on the front side of the second width folding line FW 2.
In the present embodiment, the basis weight of the absorbent body 13 can be measured by the following method. The weight of the absorbent body 13 is measured by cutting out a portion for measuring the weight per unit area from the absorbent article, and removing the portion other than the absorbent body 13 such as the main body top sheet and the main body film. The weight per unit area is calculated from the weight of the absorbent body 13 and the area of the portion for measuring the weight per unit area.
The thickness of the absorbent article can be measured by the following method, for example. A test piece having a size of 30 mm. times.30 mm was prepared using a dial gauge PEACOCK manufactured by Kawasaki corporation, Japan, using a measuring tip having a diameter of 20mm, and the thickness of the test piece was measured. The measuring device adjusts the measuring pressure relative to the test piece to 3g/cm2。
(2) Folding mode of absorbent article
Next, the folding mode of the absorbent article 1 will be described with reference to fig. 6. Fig. 6 (a) is an absorbent article 1 folded from the first width folding line FW1 as a base point. The absorbent article is formed in advance into a pants-type shape. Fig. 6 (a) shows a state in which the rear waist region S2 of the absorbent article 1 is disposed on the front.
From the state shown in fig. 6 (a), the outer joint portions 29 of the absorbent article 1 are folded inward in the width direction W toward the rear waistline region S2 side with the first front-rear folding line FL1 and the second front-rear folding line FL2 as front-rear folding lines extending in the front-rear direction L as base points. The first front-rear folding line FL1 and the second front-rear folding line FL2 are flush with the outer edge of the absorbent body 13 or are located outward in the width direction W from the outer edge of the absorbent body 13. In the folded state, the rear waistline region S2 side is located inward, and the front waistline region S1 side is located outward. Fig. 6 (b) shows the absorbent article 1 folded with the front and rear folding lines FL1, FL2 as base points.
Next, from the state shown in fig. 6 (b), the absorbent article 1 is folded in the front-rear direction L with a second width folding line FW2 extending in the width direction W as a starting point. The second width folding line FW2 is not a fold line formed when the absorbent article is further folded in a state where the outer side edge of the front waistline region and the outer side edge of the rear waistline region are joined (a fold line passing through the center in the front-rear direction of the absorbent article 1), but a fold line formed when the absorbent article is further folded in a state where the outer side edge of the front waistline region and the outer side edge of the rear waistline region are joined. The center 1LC in the front-rear direction L of the absorbent article 1 overlaps the waist opening 31 of the absorbent article 1 when folded at the second width folding line FW2 as a base point. Fig. 6 (c) shows a state in which the absorbent article 1 is folded with the second width folding line FW2 as a base point. By folding in this way, the absorbent article 1 can be downsized.
The thickness of the absorber 13 changes with the second width folding line FW2 as a boundary. More specifically, in a state in which the absorbent article 1 is not folded with the second width folding line FW2 as a base point, the thickness of a portion of the absorber located on one side in the front-rear direction L with respect to the second width folding line FW2 is different from the thickness of a portion of the absorber located on the other side in the front-rear direction L with respect to the second width folding line FW 2. In addition to this, the state in which the thickness of the portion of the absorber positioned on the other side in the front-rear direction L from the second width folding line FW2 is different in the entire portion of the absorber positioned on the one side in the front-rear direction L from the second width folding line FW2 includes the state in which the thickness of the portion of the absorber positioned on the one side in the front-rear direction L from the second width folding line FW2 is different in the portion of the absorber positioned on the other side in the front-rear direction L from the second width folding line FW 2.
The thickness of the portion of the absorber 13 of the absorbent article 1 of the present embodiment located closer to the waist opening 31 than the second width folding line FW2 is smaller than the thickness of the portion of the absorber 13 located closer to the center 1LC of the absorbent article 1 in the front-rear direction L than the second width folding line FW 2. The absorbent article 1 may be configured such that the thickness of the portion of the absorber 13 located closer to the waist opening portion side than the second width folding line FW2 is greater than the thickness of the portion of the absorber 13 located closer to the center 1LC side in the front-rear direction L of the absorbent article 1 than the second width folding line FW 2.
The state where the thickness of the absorbent article changes within the second width folding line FW2 includes not only a state where the boundary of the thickness change of the absorbent article and the second width folding line FW2 are aligned without being displaced but also a concept where the displacement in the front-rear direction L is 20mm or less. In the present embodiment, the thickness of the absorber 13 in the front waistline region S1 changes at the second width folding line FW2, and the thickness of the absorber 13 in the rear waistline region S2 changes at the second width folding line FW2, but the thickness of the absorber 13 in the front waistline region S1 may change at the second width folding line FW2, or the thickness of the absorber 13 in the rear waistline region S2 may change at the second width folding line FW 2.
In a state where the absorbent article folded in this way is unfolded (as shown in fig. 6 (a)), the absorbent body 13 of the front waistline region S1 deforms convexly from the skin-facing surface side T1 toward the non-skin-facing surface side T2 with the second width folding line FW2 as a base point. The absorber 13 of the rear waistline region S2 is deformed in a convex manner from the non-skin surface side T2 toward the skin surface side T1 with the second width folding line FW2 as a base point. The absorber 13 is disposed in a region between the first front-rear folding line FL1 and the second front-rear folding line FL 2. In a state folded with the second width folding line FW2 as a base point, the rear waistline region S2 side is located inward and the front waistline region S1 side is located outward in a region between the first front-rear folding line FL1 and the second front-rear folding line FL 2. Therefore, valley fold lines recessed from the skin-facing surface side T1 are formed in the absorber 13 of the front waistline region S2, and mountain fold lines protruding toward the skin-facing surface side T1 are formed in the absorber 13 of the front waistline region S1.
At least one of the second width folding line FW2 of the front waistline region S1 and the second width folding line FW2 of the rear waistline region S2 is formed outside the crotch compression unit 81 without being formed in the crotch compression unit 81. In the present embodiment, the second width folding line FW2 of the front waistline region S1 is formed in the crotch compressing unit 81, and the second width folding line FW2 of the rear waistline region S2 is not formed in the crotch compressing unit 81 but is positioned rearward of the rear end edge 81R of the crotch compressing unit 81. Further, the second width folding line FW2 of the front waistline region S1 may not be formed in the crotch compressing unit 81 but may be positioned forward of the front end edge 81F of the crotch compressing unit 81, the second width folding line FW2 of the rear waistline region S2 may be formed in the crotch compressing unit 81, and two folding lines of the second width folding line FW2 of the rear waistline region S2 and the second width folding line FW2 of the front waistline region S1 may not be formed in the crotch compressing unit 81.
(3) Action and Effect
The thickness of the absorber 13 changes with the second width folding line FW2 as a boundary. Therefore, when the absorbent article is folded with the second width folding line FW2 as a base point, the absorbent article can be folded with the boundary of the thickness variation as a base point, and the folded position can be stabilized. In addition, when the absorbent article is folded, the side having a relatively thin thickness is folded in the thickness direction of the side having a relatively thick thickness, and then the side having a relatively thin thickness is folded in such a manner as to cover the side having a relatively thick thickness. The thickness of the folded absorbent article is easily made uniform, and the size of the folded absorbent article can be reduced. Therefore, the user can easily carry the miniaturized absorbent article.
Since the absorbent body 13 of the rear waistline region S2 has a convex folding habit toward the wearer (japanese: folding り) due to the mountain fold line protruding toward the skin-facing surface side T1, the convex portion of the rear waistline region S2 fits the body of the wearer. Thus, back leakage can be suppressed. For example, in an absorbent article as a disposable diaper, a pocket for receiving feces is generally formed in the rear waistline region S2. Therefore, when the rear waist region S2 is fitted to the body of the wearer, the space for receiving feces is eliminated, and leakage occurs when the rear waist region S2 is fitted to the body. In contrast, there is a demand for an absorbent article such as a pants-type sanitary napkin that prevents leakage of menstrual blood to the rear side. The menstrual blood migrates from the main body top sheet 11 to the absorbent body 13 on the sanitary napkin. By fitting the rear waist region S2 to the body of the wearer, body fluid can easily move from the main body top sheet 11 side to the absorbent body 13, and rear leakage can be suppressed.
On the other hand, a folding habit of being concave toward the wearer side is formed by valley-shaped folding lines that are concave toward the non-skin-facing surface side T2 in the absorber 13 of the front waistline region S1. The front waistline region S1 can be disposed without coming into close contact with the wearer without leakage of menstrual blood due to gaps between the buttocks. By not making the front waistline region S1 fit to the wearer, friction between the skin of the wearer and the absorbent article can be reduced, and the wearing feeling can be improved.
The thickness of the portion of the rear waistline region S2 on the rear side of the second width folding line FW2 is smaller than the thickness of the portion of the rear waistline region S2 on the front side of the second width folding line FW 2. Therefore, the portion that hits the back side of the wearer is less likely to swell in the thickness direction, and can be fitted to the body of the wearer. The wearing feeling when wearing the absorbent article 1 can be improved, and the fit performance can be improved to prevent back leakage.
Generally, the area of the rear waistline region S2 is larger than that of the front waistline region S1 in order to cover the buttocks. Therefore, the rear waistline region S2 is arranged to extend outward beyond the front waistline region S1 in a state where the outer joining sections 29 are joined. For example, when the outer joint portion is folded toward the front waistline region S1 with the front and rear folding lines FL1 and FL2 as base points, if the folded area is small, the portion of the waistline region S2 extending outward from the front waistline region S1 may not be folded properly. However, by folding the outer joint portions 29 toward the rear waist region S2, even when the folded area is small, the outer joint portions can be folded appropriately. Therefore, the folding can be performed at a stable position, and the size can be reduced.
At least one of the second width folding line FW2 of the front waistline region S1 and the second width folding line FW2 of the rear waistline region S2 is not formed in the crotch compressing unit, and therefore, the second width folding line FW2 can be prevented from being hardened. Further, since the second width folding line FW2 of the rear waistline region S2 is not formed in the crotch compressing unit 81, the second width folding line FW2 of the rear waistline region S2 that fits the body of the wearer does not become excessively hard, and deterioration of the wearing feeling can be suppressed.
A front side-shaped compressed portion 86 and a rear side-shaped compressed portion 87 compressed in a planar shape in the thickness direction are formed in a portion of the absorbent body 13 overlapping the stretchable region. When the absorbent article is folded with the front and rear folding lines FL1, FL2 as base points, the absorbent article can be folded along the outer edge of the absorbent body 13. However, when the sheet constituting the front waistline region S1 has stretchability, the width of the portion of the absorbent body 13 overlapping the stretchable region may become smaller than the width of the portion of the absorbent body 13 not overlapping the stretchable region due to the stretchability of the sheet. When the absorbent article is folded with the front and rear folding lines FL1, FL2 as base points in a state where the width of the portion of the absorbent body 13 overlapping the stretch region is smaller than the width of the portion of the absorbent body 13 not overlapping the stretch region, the outer edge of the absorbent body 13 does not extend in the front-rear direction L, and therefore the folding position may be unstable. However, since the rigidity of the absorbent body 13 is increased by the planar compression section, the width of the portion of the absorbent body 13 overlapping the stretch region can be suppressed from decreasing by the stretchability of the sheet. Therefore, the width of the portion of the absorbent body 13 overlapping the stretchable region and the width of the portion of the absorbent body 13 not overlapping the stretchable region can be maintained in substantially the same state, and the folding position when the absorbent article is folded with the front and rear folding lines FL1, FL2 as base points can be stabilized. As a result, the folding can be performed at a stable position, and the size can be reduced.
In addition, by forming the planar compressed portion in the absorbent body 13, the rigidity of the absorbent body 13 is increased. Therefore, even when the thickness of the absorber 13 is reduced to suppress stuffiness, the distortion can be suppressed.
In the present embodiment, the planar compression portion is formed by a thermo-embossing roller. By compressing the absorbent body by the thermo-embossing roller, the thickness of the region in which the planar compression portion is formed can be made thin. For example, in the case where the thickness of the absorbent body is relatively thick, the absorbent body becomes free from the place after folding, so that the folded position is unstable. However, when the absorbent body is densified by the thermo-embossing roll, a difference in rigidity occurs between the region where the planar compressed portion is formed and the region where the planar compressed portion is not formed. For example, when the absorbent article is folded by a machine, it becomes easy to fold the absorbent article at a portion where a difference in rigidity occurs, and it is possible to fold the absorbent article at a certain position each time. This makes it possible to keep the length of the absorbent body to be folded constant, stabilize the fold of the absorbent body, and prevent the fold from being unexpectedly inclined. Further, by reducing the thickness of the absorber by the heat embossing roller before folding the absorbent article, the thickness of the folded absorbent article can be reduced. Further, since the dot-shaped compressed parts 82 are formed in the regions where the rear-side-shaped compressed parts are formed, the rigidity of the absorbent body 13 is further improved by the planar compressed parts and the dot-shaped compressed parts, and the folding position from the difference in rigidity due to the planar compressed parts or the like is stabilized.
(4) Other embodiments
In the absorbent article formed in the pants-type state, the absorbent article 1 may be folded only from the second width folding line FW2 without being folded from the front and rear folding lines FL1, FL 2. Even when the absorbent article is folded with the second width folding line FW2 as a starting point in the pants-shaped state, the dimension of the absorbent article in the front-rear direction L can be reduced, and the size can be reduced. In addition, the absorbent article may be folded a plurality of times with the plurality of second width folding lines FW2 as base points.
Fig. 7 shows an absorbent article according to another embodiment of the present invention. The absorbent article 1 is individually wrapped with the wrapping sheet 100. The package sheet 100 of the absorbent article 1 of the present embodiment is folded with the sheet front-rear folding lines FL101, FL102 parallel to the absorbent article front-rear folding lines FL1, FL2 as base points. When the package sheet 100 is folded along the sheet front-rear folding lines FL101, FL102, the front-rear folding lines FL1, FL2 of the absorbent article 1 are folded as base points. More specifically, the absorbent article 1 folded as shown in fig. 6 (c) is disposed on a package sheet 100 that continues in the front-rear direction L of the absorbent article 1. An adhesive agent for joining the outer end portions of the package sheet in the orthogonal direction (direction extending in the width direction of the absorbent article) is applied to the outer end portions of the package sheet in the orthogonal direction (direction extending in the front-rear direction of the absorbent article) orthogonal to the conveyance direction of the package sheet. In this state, the package sheet is folded with the front-rear folding lines FL1, FL2 of the absorbent article 1 as base points, and the outer end portions of the package sheet in the orthogonal direction are joined to each other. Then, the outer end portions of the packaging sheet in the front-rear direction are joined by heat welding. By cutting the package sheet in the orthogonal direction at the outer end in the front-rear direction of the package sheet, as shown in fig. 7 (a), an absorbent article individually packaged with the package sheet can be formed.
The front and rear folding lines FL1, FL2 of the absorbent article 1 and the sheet front and rear folding lines FL101, FL102 of the packaging sheet 100 are aligned. In a structure in which the absorbent article is not wrapped with the wrapping sheet, the absorbent article may be caused to rebound and unfold at fold lines (front-rear fold line and width fold line FW). However, the absorbent article is wrapped with the wrapping sheet, and the absorbent article can be prevented from springing back and unfolding at the fold line. Further, since the folding habit is formed not only in the absorbent article but also in the packaging sheet by the fold line, the folded state can be stabilized.
As described above, the contents of the present invention are disclosed by the embodiments of the present invention, but it should be understood that the discussion and the drawings constituting a part of the contents of the disclosure are not intended to limit the present invention. Various alternative embodiments, examples, and application techniques will be apparent to those skilled in the art in light of this disclosure. Accordingly, the scope of the invention is to be limited only by the specific details of the invention in accordance with the claims set forth below where appropriate.
The entire contents of japanese patent application No. 2014-266400 on 26/12/2014, which is the basis of the priority claims of the present application, are incorporated herein by reference.
Industrial applicability
The present invention can provide an absorbent article that can be folded at a stable position and is miniaturized.
Description of the reference numerals
1. Pants-type sanitary napkins; 1LC, center of the sanitary napkin in the front-rear direction; 10. an absorbent main body; 11. a body topsheet; 12. a bulk film; 13. an absorbent body; 14. a main body bottom sheet; 16. a low basis weight region; 17. a high basis weight region; 18. a single area weight area; 20. a substrate; 21. an outer-covering top sheet; 22. an outer bottom sheet; 24. a front side outer cover; 25. a rear side outer topsheet; 26. a waist stretchable member; 27. a leg stretchable member; 29. an outer joint part; 291. a front outer joint portion; 292. a rear outer joint section; 31. a waist opening; 32. a leg opening; 80. a compression section; 81. a crotch compressing section; 82. a dot-shaped compression section; 84. a front outer compression section; 85. a rear outer compression section; 86. a front-side-shaped compression section; 87. a rear-side-shaped compression section; s1, a front waistline region; s2, a rear waist region; l, the front-back direction; t, the thickness direction; w, width direction.

Claims (7)

1. An absorbent article, comprising:
a front waistline region that faces a wearer's crotch region and extends forward from the crotch region;
a rear waist region which is disposed on the rear side of the front waist region, faces a crotch region of a wearer, and extends rearward from the crotch region; and
an absorber disposed so as to span the front waistline region and the rear waistline region,
the outer edge of the front waistline region and the outer edge of the rear waistline region are joined together in a folded state with a first width folding line extending in the width direction of the absorbent article as a base point,
folding the absorbent article with a second width folding line extending in the width direction of the absorbent article as a base point in a state where the outer edge of the front waistline region and the outer edge of the rear waistline region are joined,
the thickness of the absorber is changed with the second width broken line as a boundary,
a front side-shaped compression part is arranged at the position which is more front than the second width folding line, a rear side-shaped compression part is arranged at the position which is more rear than the second width folding line,
the rear end edge of the front side shaped compressed portion and the position of the second width folding line in the front-rear direction are aligned without being displaced, or the displacement in the front-rear direction is 20mm or less, and the front end edge of the rear side shaped compressed portion and the position of the second width folding line in the front-rear direction are aligned without being displaced, or the displacement in the front-rear direction is 20mm or less.
2. The absorbent article according to claim 1,
the absorbent article is a pants-type sanitary napkin,
the absorbent body of the front waistline region is deformed in a convex manner from the skin-facing surface side toward the non-skin-facing surface side with the second width folding line as a base point,
the absorbent body of the rear waistline region is deformed convexly from the non-skin-facing surface side toward the skin-facing surface side with the second width folding line as a base point.
3. The absorbent article of claim 2, wherein,
the thickness of a portion of the rear waist region on the rear side of the second width folding line is smaller than the thickness of a portion of the rear waist region on the front side of the width folding line.
4. The absorbent article according to claim 2 or 3, wherein,
an outer joining portion for joining an outer side edge of the front waistline region and an outer side edge of the rear waistline region is folded inward in the width direction toward the rear waistline region side with a front-rear folding line extending in the front-rear direction of the absorbent article as a base point.
5. The absorbent article according to any one of claims 1 to 3, wherein,
the absorbent body is compressed in the thickness direction, and a crotch compression part extending in the front-rear direction from the center in the front-rear direction of the absorbent article is formed,
at least one of the second width folding line of the front waistline region and the second width folding line of the rear waistline region is formed outside the crotch compression unit.
6. The absorbent article according to any one of claims 1 to 3, wherein,
a stretchable region stretchable in the width direction is provided in at least a part of the front waistline region and the rear waistline region,
the front-side-shaped compressed portion and the rear-side-shaped compressed portion are formed by compressing the absorbent body in a planar shape in the thickness direction, and are formed in a portion of the absorbent body that overlaps the stretchable region.
7. The absorbent article according to any one of claims 1 to 3, wherein,
the absorbent article is individually wrapped with a wrapping sheet.
CN201580071205.1A 2014-12-26 2015-12-16 Absorbent article Active CN107106378B (en)

Applications Claiming Priority (3)

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JP2014266400A JP6006289B2 (en) 2014-12-26 2014-12-26 Absorbent articles
PCT/JP2015/085196 WO2016104277A1 (en) 2014-12-26 2015-12-16 Absorbent article

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