CN112040918A - Pants-type absorbent article - Google Patents

Pants-type absorbent article Download PDF

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Publication number
CN112040918A
CN112040918A CN201980028222.5A CN201980028222A CN112040918A CN 112040918 A CN112040918 A CN 112040918A CN 201980028222 A CN201980028222 A CN 201980028222A CN 112040918 A CN112040918 A CN 112040918A
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CN
China
Prior art keywords
skin
core
elastic threads
down direction
absorbent article
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Pending
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CN201980028222.5A
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Chinese (zh)
Inventor
槙秀晃
井上拓也
清水纪子
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Unicharm Corp
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Unicharm Corp
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Publication of CN112040918A publication Critical patent/CN112040918A/en
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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
    • 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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  • 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

In a pants-type absorbent article (1), at least an abdomen-side waist portion (20) has an upper side portion (AU) positioned above an absorbent main body (10) in the vertical direction and a core side portion (AC) overlapping an absorbent core (11A) in the front-rear direction, a plurality of elastic threads (23) have upper elastic threads (23u) arranged on the upper side portion (AU) and core-side elastic threads (23c) arranged on the core side portion (AC), wherein the average value of the pitches between the upper side elastic threads (23u) in the upper side portion (AU) is smaller than the average value of the pitches between the core side elastic threads (23c) in the core side portion (AC), and the value obtained by dividing the force of the upper side part (AU) extending in the left-right direction by the unit length is smaller than the value obtained by dividing the force of the core side part (AC) extending in the left-right direction by the unit length (H1) of the upper side part (AU) in the up-down direction by the length (H3) of the core side part (AC) in the up-down direction.

Description

Pants-type absorbent article
Technical Field
The present invention relates to a pants-type absorbent article.
Background
Pants-type disposable diapers are known as examples of pants-type absorbent articles. For example, patent document 1 discloses a pants-type disposable diaper 1 including a belly-side sheet member 2, a back-side sheet member 3, and an absorbent core 5. Each of the ventral-side sheet member 2 and the dorsal-side sheet member 3 includes a linear elastic member 7 that is extensible in the width direction. Each of the waistline elastic members 7W is disposed above the corresponding upper end portion 5W of the absorbent core 5 to prevent the diaper from slipping off.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-13683
Disclosure of Invention
Problems to be solved by the invention
However, when an infant having a round abdomen portion wears the pants-type disposable diaper 1 of patent document 1, there is a risk that each of the waistline elastic members 7W excessively pinches the abdomen of the infant.
The present invention has been made in view of the conventional problems such as described above, and an object of the present invention is to provide a pants-type absorbent article that fits the abdomen of a wearer softly.
Means for solving the problems
A main aspect of the present invention for achieving the above object is a pants-type absorbent article having an up-down direction, a left-right direction, and a front-back direction, and comprising: an absorbent body comprising an absorbent core; and a pair of waistline portions, the waistline portion including: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads that are stretchable in the left-right direction, at least the abdomen-side waistline portion of the pair of waistline portions including: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction, the plurality of elastic threads including: a plurality of upper elastic threads intermittently arranged on the upper side portion in the up-down direction; and a plurality of core-side elastic threads intermittently arranged in the up-down direction on the core-side portion, an average value of pitches between the upper-side elastic threads adjacent to each other in the up-down direction in the upper-side portion is smaller than an average value of pitches between the core-side elastic threads adjacent to each other in the up-down direction in the core-side portion, and a value obtained by dividing a magnitude of a force by which the upper-side portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the upper-side portion is smaller than a value obtained by dividing a magnitude of a force by which the core-side portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the core-side portion.
Other features of the present invention will become apparent by reading the description of the present specification with reference to the accompanying drawings.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, the pitch between the elastic threads of the upper side portion is smaller than the pitch between the elastic threads of the core side, so that it is easier to bring the upper side portion into face-to-face contact with the skin of the wearer. On the other hand, it is easier to reduce the risk of making a line mark on the skin of the wearer by the elastic threads of the upper side portion having a smaller contractive force than the elastic threads of the core portion side.
Drawings
Fig. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper").
Fig. 2 is a schematic plan view of the diaper 1 in a developed state and in an extended state when viewed from the skin-side surface side.
Fig. 3 is an enlarged view of the abdominal-side waistline portion 20 in fig. 2.
Fig. 4 is an enlarged view of the back-side waistline portion 30 in fig. 2.
Fig. 5 is a schematic sectional view along an arrow a-a in fig. 3.
Fig. 6 is a schematic sectional view along the arrow B-B in fig. 4.
Fig. 7 shows the joint of the abdomen-side waist portion 20 in fig. 3.
Fig. 8 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Fig. 9 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Fig. 10 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Fig. 11 is a perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper").
Fig. 12 is a schematic plan view of the diaper 1 in an unfolded state and in an elongated state when viewed from the skin-side surface side.
Fig. 13 is an enlarged view of the abdominal-side waistline portion 20 in fig. 12.
Fig. 14 is an enlarged view of the back-side waistline portion 30 in fig. 12.
Fig. 15 is a schematic sectional view along an arrow a-a in fig. 13.
Fig. 16 is a schematic sectional view along the arrow B-B in fig. 14.
Fig. 17 shows the joint of the abdominal-side waistline portion 20 in fig. 13.
Fig. 18 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Fig. 19 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Fig. 20 is a schematic view showing a cross section of a modification of the abdomen-side waist portion 20.
Fig. 21 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Fig. 22 is a schematic cross-sectional view illustrating a modification of the abdomen-side waist portion 20.
Detailed Description
At least the following matters will become clear from the description of the present specification and the accompanying drawings.
A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, and comprising: an absorbent body comprising an absorbent core; and a pair of waistline portions, the waistline portion including: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads that are stretchable in the left-right direction, at least the abdomen-side waistline portion of the pair of waistline portions including: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction, the plurality of elastic threads including: a plurality of upper elastic threads intermittently arranged on the upper side portion in the up-down direction; and a plurality of core-side elastic threads intermittently arranged in the up-down direction on the core-side portion, an average value of pitches between the upper-side elastic threads adjacent to each other in the up-down direction in the upper-side portion is smaller than an average value of pitches between the core-side elastic threads adjacent to each other in the up-down direction in the core-side portion, and a value obtained by dividing a magnitude of a force by which the upper-side portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the upper-side portion is smaller than a value obtained by dividing a magnitude of a force by which the core-side portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the core-side portion.
According to such a pants-type absorbent article, the pitch between the elastic threads of the upper portion is smaller than the pitch between the elastic threads of the core portion, so that the upper portion is more likely to be brought into face-to-face contact with the skin of the wearer. On the other hand, it is easier to reduce the risk of the elastic threads of the upper side portion having a smaller contractive force than the elastic threads of the core portion side causing line marks on the skin of the wearer.
A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, and comprising: an absorbent body comprising an absorbent core; and a pair of waistline portions, the waistline portion including: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads that are stretchable in the left-right direction, at least the abdomen-side waistline portion of the pair of waistline portions including: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction, the plurality of elastic threads including: a plurality of upper elastic threads intermittently arranged on the upper side portion in the up-down direction; and a plurality of core-side elastic threads intermittently arranged in the up-down direction on the core-side portion, an average value of pitches between the upper-side elastic threads adjacent to each other in the up-down direction in the upper-side portion being smaller than an average value of pitches between the core-side elastic threads adjacent to each other in the up-down direction in the core-side portion, and an average value of diameters of the plurality of upper-side elastic threads being smaller than an average value of diameters of the plurality of core-side elastic threads.
According to such a pants-type absorbent article, the pitch between the elastic threads of the upper side portion is smaller than the pitch between the elastic threads of the core portion, so that the upper side portion can be more easily brought into face-to-face contact with the skin of the wearer. On the other hand, it is easier to reduce the risk of the elastic thread of the upper side portion having a smaller diameter than the elastic thread of the core portion side causing a thread mark on the skin of the wearer.
In such a pants-type absorbent article, it is desirable that the plurality of upper elastic threads be provided so as to extend continuously from one end portion to the other end portion of the abdomen-side waist portion in the left-right direction.
According to such a pants-type absorbent article, the upper elastic threads make it easier for the abdomen-side waist portion to fit the abdomen of the wearer from one end of the abdomen-side waist portion to the other end.
In such a pants-type absorbent article, it is desirable that no cutout portion be provided at an upper end portion in the vertical direction of the abdomen-side waist portion in a central portion in the horizontal direction of the abdomen-side waist portion.
According to such a pants-type absorbent article, the risk of the upper elastic threads leaving marks on the wearer's skin can be reduced in a pants-type absorbent article in which no notch is provided at the upper end of the abdomen-side waistline portion.
In such a pants-type absorbent article, it is desirable that the abdominal-side waistline portion includes an intermediate portion that overlaps with the absorbent main body in the front-rear direction and is located above the absorbent core in the up-down direction, and the plurality of elastic threads include intermediate elastic threads arranged in the intermediate portion.
According to such a pants-type absorbent article, the intermediate elastic threads make the intermediate portion more likely to fit the body of the wearer.
In such a pants-type absorbent article, it is desirable that a value obtained by dividing a magnitude of a force by which the upper side portion is extended by a unit length in the left-right direction by the length of the upper side portion in the up-down direction is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is extended by a unit length in the left-right direction by the length of the intermediate portion in the up-down direction.
According to such a pants-type absorbent article, the intermediate portion is made to fit the skin of the wearer better, and the upper side portion is made to be in soft contact with the skin of the wearer, so that the risk of leakage of excrement from the absorbent main body can be reduced, and the upper end portion can be prevented from forming a line mark on the skin of the wearer.
In such a pants-type absorbent article, it is desirable that a value obtained by dividing a magnitude of a force by which the core-side portion is extended by a unit length in the left-right direction by the length of the core-side portion in the up-down direction is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is extended by a unit length in the left-right direction by the length of the intermediate portion in the up-down direction.
According to such a pants-type absorbent article, the risk of leakage of excrement from the upper side of the absorbent main body can be reduced by fitting the intermediate portion to the skin of the wearer more closely than the core side portion.
In such a pants-type absorbent article, it is desirable that the pants-type absorbent article further includes an upper side panel portion that is formed by folding back an upper end portion of the non-skin side panel portion toward the skin side, and a lower end of the upper side panel portion is located below an upper end of the absorbent main body.
According to such a pants-type absorbent article, a difference in rigidity between the upper end and the upper side portion of the absorbent main body can be reduced, so that the risk of bending in the up-down direction at the upper portion of the upper end of the absorbent main body can be reduced.
In such a pants-type absorbent article, it is desirable that the upper side portion includes an upper side panel portion located on the skin side with respect to the skin side panel portion, and in the front-rear direction, the upper side elastic thread is arranged on the skin side with respect to the skin side panel portion and on the non-skin side with respect to the upper side panel portion, and the core side elastic thread is arranged on the non-skin side with respect to the skin side panel portion and on the skin side with respect to the non-skin side panel portion.
According to such a pants-type absorbent article, when the pants-type absorbent article is viewed from the non-skin side, it is difficult to visually recognize the upper side elastic threads of the waist portion as compared with the core side elastic threads, so that the wearer is more likely to be given an impression that the upper side portion is softly fitted around the waist portion.
In such a pants-type absorbent article, it is desirable that the upper side portion has a joint portion by which the skin-side panel portion and the non-skin-side panel portion are joined.
According to such a pants-type absorbent article, the rigidity of the upper side portion can be further improved, so that the risk of the upper side portion curling in the vertical direction due to contraction of the elastic thread can be reduced.
In such a pants-type absorbent article, it is desirable that the abdomen-side waist portion has a joined portion through which the skin-side panel portion and the non-skin-side panel portion are joined, the joined portion has a shape extending in the up-down direction, and a plurality of the joined portions are intermittently arranged in the left-right direction.
According to such a pants-type absorbent article, the use of the joined portion can increase the vertical rigidity of the waist portion, and the risk of the waist portion curling in the vertical direction due to contraction of the elastic thread can be reduced.
In such a pants-type absorbent article, it is desirable that the back-side waistline portion of the pair of waistline portions includes: a back-side upper portion that overlaps with the upper portion in the up-down direction; and a back-side core-side portion overlapping with the core-side portion in the up-down direction, the plurality of elastic threads including: a plurality of back-side upper elastic threads intermittently arranged on the back-side upper portion in the up-down direction; and a plurality of back-side core-side elastic threads that are intermittently arranged in the up-down direction on the back-side core-side portion, and that make a value obtained by dividing a magnitude of a force by which the back-side upper-side portion is elongated by a unit length in the left-right direction by the length in the up-down direction of the back-side upper-side portion larger than a value obtained by dividing a magnitude of a force by which the back-side core-side portion is elongated by a unit length in the left-right direction by the length in the up-down direction of the back-side core-side portion.
According to such a pants-type absorbent article, the back-side upper elastic threads have a greater elongation force than the back-side core-side elastic threads, and the back-side upper elastic threads make it easier to reduce the risk of the absorbent article falling when the absorbent article is worn.
In such a pants-type absorbent article, it is desirable that an average value of pitches between the back-side upper elastic threads adjacent to each other in the up-down direction in the back-side upper portion is smaller than an average value of pitches between the back-side core elastic threads adjacent to each other in the up-down direction in the back-side core side portion.
According to such a pants-type absorbent article, the elongation force of the back-side upper elastic threads is greater than the elongation force of the back-side core-side elastic threads, and the back-side upper elastic threads make it easier to further reduce the risk of the absorbent article falling when the absorbent article is worn.
In such a pants-type absorbent article, it is desirable that the back-side waistline portion of the pair of waistline portions includes: a back-side upper portion that overlaps with the upper portion in the up-down direction; and a back-side core-side portion overlapping with the core-side portion in the up-down direction, the plurality of elastic threads including: a plurality of back-side upper elastic threads intermittently arranged on the back-side upper portion in the up-down direction; and a plurality of back-side core-side elastic threads intermittently arranged in the up-down direction on the back-side core-side portion, an average value of pitches between the upper-side elastic threads adjacent to each other in the up-down direction in the upper-side portion is smaller than or equal to an average value of pitches between the back-side upper-side elastic threads adjacent to each other in the up-down direction in the back-side upper-side portion, and a magnitude of a force by which the upper-side portion is elongated by a unit length in the left-right direction is smaller than or equal to a magnitude of a force by which the back-side upper-side portion is elongated by a unit length in the left-right.
According to such a pants-type absorbent article, the elastic threads of the back-side waistline portion make it easier to fit the pants-type absorbent article around the waistline of the wearer. On the other hand, the pitch between the elastic threads of the abdomen-side waist portion is set to be less than or equal to the average value of the back-side upper portion. Therefore, in the abdomen-side waistline portion, the force for stretching the elastic thread is small, so that it is possible to prevent the abdomen of the wearer from being excessively pressed in the case where the absorbent article is in surface contact with the skin in the upper portion.
In the first embodiment, the first embodiment is described below
A first embodiment will be described below with reference to a disposable diaper for infants as an example of a pants-type absorbent article according to the present invention. However, the pants-type absorbent article according to the present invention is not limited to, for example, disposable diapers for infants, but may be applied to disposable diapers for adults, sanitary pants, and the like.
The disposable diaper 1 has a structure of pants type
Fig. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper"). Fig. 2 is a schematic plan view of the diaper 1 in a developed state and in an extended state when viewed from the skin-side surface side. The "developed state" refers to a state in which the entire diaper 1 is developed flatly by separating and opening the two joined regions 2 of the both side portions of the diaper 1 in the pants-type state (i.e., the two joined regions 2 joining the both side end portions of the abdomen-side waistline portion 20 and the both side end portions of the back-side waistline portion 30). The "stretched state" refers to a state in which the stretchable member of the diaper 1 is stretched so that wrinkles are not visible. Specifically, the "extended state" refers to a state in which the dimensions of the respective members (for example, the abdomen-side waist portion 20 described later) constituting the diaper 1 match or are close to the dimensions of the members themselves. The line C-C in fig. 2 is the center line in the left-right direction.
In the pants-type state shown in fig. 1, the diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction, and has a waistline opening BH and a pair of leg hole openings LH. In the up-down direction, the waistline opening BH side is the upper side, and the crotch side is the lower side. The direction in which the materials constituting the diaper 1 are laminated is the thickness direction. In the thickness direction, the side in contact with the wearer is the skin side, and the opposite side is the non-skin side. The front-back direction of the diaper 1 in the pants-type state corresponds to the thickness direction of the diaper 1 in the developed state.
The diaper 1 is a so-called three-piece type and includes an absorbent main body 10, an abdominal-side waistline portion 20, and a back-side waistline portion 30. The abdomen-side waistline portion 20 covers the abdomen side of the wearer, and the back-side waistline portion 30 covers the back side of the wearer.
In the diaper 1 shown in fig. 2 in an unfolded state, the abdominal-side waistline portion 20 and the back-side waistline portion 30 are arranged in such a manner that the longitudinal direction thereof is along the left-right direction of the diaper 1. The abdomen-side waistline portion 20 is joined at the center portion in the left-right direction to one end portion in the longitudinal direction of the absorbent main body 10 by an adhesive portion H10 (fig. 5) such as a hot melt adhesive, and the back-side waistline portion 30 is joined at the center portion in the left-right direction to the other end portion in the longitudinal direction of the absorbent main body 10 by an adhesive portion H10 (fig. 5). As a pattern of the adhesive applied in the adhesive portion H10, there is a known pattern such as a stripe pattern, a spiral pattern, an Ω -shaped pattern, or the like. The method of joining the abdominal-side waistline portion 20 and the back-side waistline portion 30 to the absorbent main body 10 is not limited to the method using the adhesive, and a welded region fixed by thermal welding, ultrasonic welding, or the like may be employed.
The diaper 1 in the developed state shown in fig. 2 has a shape symmetrical in the left-right direction with respect to the center line C-C. The absorbent main body 10 is folded in half at substantially the center C10 in the longitudinal direction so that the longitudinal direction of the absorbent main body 10 is along the up-down direction of the diaper 1, and both side end portions of the abdomen-side waistline portion 20 in the left-right direction of the diaper 1 and both side end portions of the back-side waistline portion 30 in the left-right direction of the diaper 1 are joined by means of such as thermal welding or ultrasonic welding, with the result that a pair of joined regions 2 is formed. Thus, the diaper 1 shown in fig. 1 is produced in a pants-type state.
The absorbent main body 10 includes: an absorbent body 11; a liquid-permeable top sheet 12 disposed on the skin side with respect to the absorbent body 11; a liquid-impermeable back sheet 13 disposed on the non-skin side with respect to the absorbent body 11; an exterior sheet 14 disposed on the non-skin side with respect to the back sheet 13.
The absorber 11 has a substantially rectangular shape in plan view, and includes: an absorbent core 11A that absorbs and retains excretory fluid such as urine; a liquid-permeable core wrap sheet 11B covering the absorbent core 11A. An example of the absorbent core 11A is a molded body made of liquid absorbent fibers (e.g., pulp containing Super Absorbent Polymer (SAP)) or the like, and the molded body is shaped into a predetermined shape such as a substantially hourglass shape in a plan view. Examples of the core wrap sheet 11B are liquid-permeable sheets such as toilet paper, nonwoven fabric, and the like.
As shown in fig. 2, leg-surrounding elastic members 15 are provided at both ends in the left-right direction of the absorbent main body 10 so that the diaper 1 fits around the legs of the wearer. The leg hole elastic members 15 are fixed between the two outer sheets 14 folded back inward in the left-right direction, for example, in a state of being extended in the longitudinal direction of the absorbent main body 10. The leg elastic members 15 are exemplified by elastic threads and stretchable sheets.
Each of the abdomen-side waistline portion 20 and the back-side waistline portion 30 has a substantially rectangular shape. In the center portion in the left-right direction of the abdominal-side waistline portion 20, the upper end portion of the abdominal-side waistline portion 20 does not have a notch portion. The "cutout portion" is a portion having a shape recessed downward from the upper end portion of the abdomen-side waistline portion 20, for example. Similarly, at the center portion in the left-right direction of the back-side waistline portion 30, no notch portion is provided at the upper end portion of the back-side waistline portion 30. The abdomen-side waist portion 20 includes: a skin side sheet (skin side sheet) 21, a non-skin side sheet 22, and a plurality of elastic threads 23. The back waist portion 30 includes a skin side sheet 31, a non-skin side sheet 32, and a plurality of elastic strands 33. The skin side sheets 21 and 31 are joined to the non-skin side sheets 22 and 32, respectively, with an adhesive such as a hot melt adhesive. The plurality of elastic threads 23 and 33 will be described in detail later.
The non-skin side sheets 22 and 32 are disposed on the non-skin side with respect to the skin side sheets 21 and 31. The skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 are disposed on the non-skin side with respect to the absorbent main body 10. In order to improve texture and durability, the upper end portions of the non-skin side sheets 22 and 32 respectively constitute folded- back portions 22u and 32u folded back downward. The non-skin side sheet 22 includes a non-skin side sheet portion 22n and a folded-back portion 22 u.
As for the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32, non-stretchable sheets such as SMS nonwoven fabric (spunbond/meltblown/spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, plastic sheet, perforated plastic sheet and laminated sheet made by laminating such sheets or fabrics can be used.
The abdomen-side waist portion 20 includes a sheet member 24 located on the skin side with respect to the folded-back portion 22 u. The sheet member 24 is joined to the absorbent main body 10 and the folded-back portion 22u by an adhesive portion H24 (see fig. 5) so as to straddle the upper end of the abdomen side of the absorbent main body 10. Likewise, the back-side waistline portion 30 includes a sheet member 34 located on the skin side with respect to the folded back portion 32 u. The sheet member 34 is joined to the absorbent main body 10, the folded portion 32u, and the skin side sheet 31 with an adhesive H34 (see fig. 6) so as to straddle the back-side upper end of the absorbent main body 10. The sheet members 24 and 34 are rectangular sheet members made of nonwoven fabric or the like. The sheet members 24 and 34 can prevent the end portions of the absorbent main body 10 in the up-down direction from directly contacting the skin of the wearer, and can achieve better feeling of the abdomen-side waist portion 20 and the back-side waist portion 30 when the diaper 1 is worn. Also, the sheet members 24 and 34 allow the abdomen-side waistline portion 20 and the back-side waistline portion 30 to be more firmly joined to the absorbent main body 10.
The elastic threads 23 and 33 are also referred to as elastic threads
Fig. 3 is an enlarged view of the abdominal-side waistline portion 20 in fig. 2. Fig. 4 is an enlarged view of the back-side waistline portion 30 in fig. 2. A plurality of elastic threads 23(33) coated with an adhesive such as a hot-melt adhesive are arranged in parallel between the skin side sheets 21(31) and the non-skin side sheets 22(32) in a region from the upper end to the lower end of the skin side sheets 21(31) and the non-skin side sheets 22(32), and the elastic threads 23(33) are fixed in a state of being stretched in the left-right direction. Therefore, the abdominal-side waistline portion 20 and the back-side waistline portion 30 are joined to each other and stretched in the left-right direction, fitting around the waistline of the wearer.
As shown in fig. 3, the abdominal-side waistline portion 20 includes an abdominal-side upper side portion AU, an abdominal-side intermediate portion AM, and an abdominal-side core portion AC in this order from the upper side. Specifically, the abdominal-side upper side portion AU is a rectangular region located above the absorbent main body 10 in the vertical direction in the abdominal-side waistline portion 20. The abdominal-side core side portion AC is a rectangular region overlapping with the absorbent core 11A in the front-rear direction in the abdominal-side waistline portion 20. The stomach-side intermediate portion AM is a rectangular region overlapping the absorbent main body 10 and located above the absorbent core 11A.
As shown in fig. 4, the back-side waistline portion 30 includes a back-side upper side portion BU, a back-side intermediate portion BM, and a back-side core side portion BC in this order from the upper side. Specifically, in the diaper 1 in the pants-type state, a region of the back-side waistline portion 30 that overlaps with the abdominal-side upper side portion AU of the abdominal-side waistline portion 20 in the front-rear direction is the back-side upper side portion BU. Further, a region of the back-side waistline portion 30 which overlaps with the abdominal-side intermediate portion AM of the abdominal-side waistline portion 20 in the front-rear direction is a back-side intermediate portion BM, and a region of the back-side waistline portion 30 which overlaps with the abdominal-side core-side portion AC of the abdominal-side waistline portion 20 in the front-rear direction is a back-side core-side portion BC.
Fig. 5 is a schematic view of a cross section viewed along an arrow a-a in fig. 3. Fig. 6 is a schematic view of a cross section viewed along an arrow B-B in fig. 4. In fig. 5 and 6, the dimensions are appropriately changed for the purpose of facilitating understanding of the structure relating to the thickness direction.
As shown in fig. 5, the abdomen-side waistline portion 20 includes, in order from the skin side, a sheet member 24, a folded-back portion 22u, a skin-side elastic thread 23u, a skin-side sheet 21, a non-skin-side elastic thread 23c, an adhesive portion (joint portion) H20, and a non-skin-side sheet portion 22 n. The elastic thread 23 of the abdomen-side waist portion 20 includes: a ventral upper side elastic thread 23t arranged in the ventral upper side portion AU; a ventral medial elastic thread 23m disposed in the ventral medial portion AM; and ventral core-side elastic threads 23d arranged in the ventral core-side portion AC. Specifically, the plurality of skin-side elastic threads 23u are arranged as the ventral upper elastic threads 23t, the plurality of skin-side elastic threads 23u and the plurality of non-skin-side elastic threads 23c are arranged as the ventral middle elastic threads 23m, and the plurality of non-skin-side elastic threads 23c are arranged as the ventral core-side elastic threads 23 d.
As shown in fig. 6, the back-side waistline portion 30 includes, in order from the skin side, a sheet member 34, a folded-back portion 32u, a skin-side sheet 31, elastic threads 33, and a non-skin-side sheet portion 32 n. The elastic thread 33 of the back side waist portion 30 includes: a back-side upper elastic thread 33t arranged in the back-side upper side portion BU; a back-side intermediate elastic thread 33m disposed in the back-side intermediate portion BM; and a back-side core-side elastic thread 33d arranged in the back-side core-side BC. The elastic strands 33 of the back waistline portion 30 do not include skin-side elastic strands such as the skin-side elastic strands of the abdomen-side waistline portion 20, and all of the elastic strands 33 are arranged at positions corresponding to the positions of the non-skin-side elastic strands 23c of the abdomen-side waistline portion 20.
The folded-back portion 22u of the abdomen-side waist portion 20 is also referred to as an "upper side sheet portion 22 s" provided on the skin side with respect to the skin-side elastic thread 23 u. The lower end of the folded back portion 22u is desirably located below the upper end of the absorbent main body 10. That is, the folded back portion 22u may be disposed not only in the ventral upper side portion AU but also to the ventral intermediate portion AM. This makes it possible to alleviate the difference in rigidity in the upper end of the absorbent main body 10 caused by the upper end portion of the absorbent main body 10 having higher rigidity. Therefore, the risk of bending at the upper end of the absorbent main body 10 as a boundary can be reduced.
Desirably, the skin-side elastic thread 23u is disposed on the skin side with respect to the skin-side sheet 21 and on the non-skin side with respect to the folded-back portion 22u, and the non-skin-side elastic thread 23c is disposed on the non-skin side with respect to the skin-side sheet 21 and on the skin side with respect to the non-skin-side sheet portion 22n in the front-rear direction. That is, since the skin-side elastic strands 23u are disposed on the skin side with respect to the skin side sheet 21 and the non-skin-side elastic strands 23c are disposed on the non-skin side with respect to the skin side sheet 21, the skin-side elastic strands 23u are disposed on the skin side with respect to the non-skin-side elastic strands 23 c. In the abdominal-side upper side portion AU, the skin side sheet 21, the adhesive portion H20, and the non-skin side sheet portion 22n are disposed on the non-skin side with respect to the skin-side elastic thread 23 u. Therefore, when the diaper 1 in the pants-type state, particularly the diaper 1, is being worn, as viewed from the non-skin side, the non-skin side elastic threads 23u are seen through a greater number of materials than when the non-skin side elastic threads 23c are seen. This may make the skin-side elastic strands 23u less visible than the non-skin-side elastic strands 23c in the abdominal-side upper side portion AU, so that it is easier for the wearer to give the impression that the diaper 1 fits softly around the waistline of the wearer without excessively strangling the wearer around the waistline. As shown in fig. 2 and 3, the skin-side elastic strands 23u and the non-skin-side elastic strands 23c, which are the intermediate elastic strands 23m, are continuously provided from one end portion to the other end portion in the left-right direction of the abdominal-side waistline portion 20, so that the abdominal-side waistline portion 20 can be attached to the skin of the wearer from one end portion to the other end portion thereof. In addition, as shown in fig. 2 and 3, when the non-skin side elastic threads 23c that are more easily visible than the skin side elastic threads 23u are provided, the wearer is likely to have an impression that a large contractive force of the non-skin side elastic threads 23c acts on the abdominal side core portion AC.
Preferably, in the abdominal-side upper side portion AU, the skin side sheet 21 is attached to the non-skin side sheet portion 22n with an adhesive portion H20 such as a hot-melt adhesive. In the abdominal-side upper portion AU, there is a risk that the upper end portion of the abdominal-side waist portion 20 curls and sags due to contraction of the skin-side elastic thread 23 u. In this regard, in the abdominal-side upper side portion AU, adhering the skin side sheet 21 to the non-skin side sheet portion 22n using the adhesive enables the rigidity of the adhesive portion H20 to increase the rigidity of the front-side upper side portion AU, so that the risk of curling of the upper end portion of the abdominal-side waist body portion 20 can be reduced. Note that the bonding portion H20 is not limited to a bonding portion by an adhesive, and for example, a bonding portion by means of such as thermal welding, ultrasonic fusion, or the like may be employed.
As shown in fig. 5, the average value of the pitch Pt between the ventral upper elastic threads 23t is smaller than the average value of the pitch Pd between the ventral core elastic threads 23 d. Further, a value (F1/H1) obtained by dividing the magnitude F1 of the force for extending the ventral upper portion AU by the unit length in the left-right direction by the length H1 in the up-down direction of the ventral upper portion AU is smaller than a value (F3/H3) obtained by dividing the magnitude F3 of the force for extending the ventral core AC by the unit length in the left-right direction by the length H3 in the up-down direction of the ventral core AC (F1/H1< F3/H3).
The average value of the diameters of the plurality of ventral upper elastic threads 23t is smaller than the average value of the diameters of the plurality of ventral core elastic threads 23 d. In short, each ventral upper elastic thread 23t is thinner than each ventral core elastic thread 23 d. Therefore, the contraction force of each abdominal side upper elastic thread 23t in the left-right direction is smaller than the contraction force of each abdominal side core elastic thread 23d in the left-right direction.
The pitch Pt between the ventral upper elastic strands 23t is the length between the centers of the ventral upper elastic strands 23t adjacent in the up-down direction. The pitch Pt between the abdomen-side upper elastic threads 23t is also the pitch between the skin-side elastic threads 23 u. In the present embodiment, it is desirable that the average value of the pitch Pt is 2.5mm, and the pitch Pt is 1.0mm to 4.0 mm. The pitch Pd between the abdominal-side core elastic strands 23d is the length between the centers of the abdominal-side core elastic strands 23c adjacent in the up-down direction. The pitch Pd between the abdominal-side core-side elastic threads 23d is also the pitch between the non-skin-side elastic threads 23 c. In the present embodiment, it is desirable that the average value of the pitch Pd is 7.0mm, and the pitch Pd is 5.0mm to 10.0 mm. In the present embodiment, although each pitch Pt is substantially equal intervals and each pitch Pd is substantially equal intervals, the pitch Pt and the pitch Pd are not limited thereto. The respective pitches Pt and Pd may be any values. Although the ventral-side upper elastic threads 23t have substantially the same thickness and the ventral-side core elastic threads 23d have substantially the same thickness, the thickness is not limited thereto. The ventral upper elastic strands 23t and the ventral core elastic strands 23d may have any thickness.
A force for causing elongation in the left-right direction, that is, an "elongation force" in the left-right direction is a "contraction force" in the left-right direction. Therefore, when the stomach-side upper side portion AU is expanded outward in the left-right direction by a predetermined force, the stomach-side upper side portion AU tries to contract inward in the left-right direction. The force acting inward in the left-right direction is a "contraction force". For example, the extension force required to bring the diaper 1 in its natural state into an extended state is equal to the contraction force to return the diaper 1 in its extended state to its natural state. Instead of the "elongation force", a "contraction force" may be used below. That is, the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral upper portion AU is smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral core portion AC. This also applies to the force that elongates each portion of the back-side waistline portion 30 in the right-left direction.
As compared with the case where the abdominal core side portion AC is brought into surface-to-surface contact, the average value of the pitch Pt between the abdominal side upper elastic threads 23t is set smaller than the average value of the pitch Pd between the abdominal side core elastic threads 23d, and the abdominal side upper side portion AU is more easily brought into surface-to-surface contact with the skin of the wearer. Therefore, the risk of the ventral upper side elastic threads 23t locally pinching the wearer's skin can be reduced.
However, in general, as the average value of the pitch Pt between the abdomen-side upper elastic threads 23t decreases, the number of the abdomen-side upper elastic threads 23t increases, and as a result, the contractive force of the abdomen-side upper side portion AU tends to increase. In particular, since the infant has a round abdomen, the infant is easily affected by the contraction of the abdomen-side upper elastic thread 23 t. When the contraction force of the entire abdomen-side waist portion 20 is reduced, the diaper 1 being worn may not fit the abdomen of the wearer and may fall.
In this regard, the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral upper side portion AU is smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral core side portion AC. The ventral upper side portion AU having a smaller contractive force is more softly brought into contact with the wearer's abdomen. Therefore, the occurrence of excessive pinching of the wearer's abdomen due to contraction of the abdominal side upper side elastic threads 23t can be reduced, and thus the frequency of marks formed on the wearer's skin by the abdominal side upper side elastic threads 23t can be reduced. On the other hand, since the abdominal-side core-side portion AC having a large contractive force closely fits around the waistline of the wearer, the possibility of the diaper 1 falling down can be reduced, and the absorbent core 11A can be brought into strong contact with the skin of the wearer, with the result that the possibility of leakage of excrement can be reduced.
Desirably, the medial side intermediate portion AM is also provided with a medial elastic thread 23 m. The absorbent main body 10 is easily fitted to the abdomen of the wearer due to contraction of the intermediate elastic threads 23 m. Further, as shown in fig. 5, when the abdomen-side intermediate portion AM includes the skin-side elastic threads 23u and the non-skin-side elastic threads 23c as the intermediate elastic threads 23m, the absorbent main body 10 more easily fits the abdomen of the wearer. Since the abdominal-side middle section AM is the upper end portion on the abdominal side of the absorbent main body 10, the upper end portion on the abdominal side of the absorbent main body 10 can be brought into stronger contact with the skin of the wearer, and the possibility of leakage of excrement from the upper end on the abdominal side of the absorbent main body 10 can be reduced.
Desirably, a value (F1/H1) obtained by dividing the magnitude F1 of the force for extending the abdominal side upper section AU by the unit length in the left-right direction by the length H1 in the up-down direction of the abdominal side upper section AU is smaller than a value (F2/H2) obtained by dividing the magnitude F2 of the force for extending the abdominal side intermediate section AM by the unit length in the left-right direction by the length H2 in the up-down direction of the abdominal side intermediate section AM (F1/H1< F2/H2). Therefore, the abdominal-side upper side portion AU, which has a smaller contractive force than the abdominal-side intermediate portion AM, is in relatively soft contact with the skin of the wearer while the abdominal-side intermediate elastic threads 23m prevent leakage of excrement by fitting the absorbent main body 10 to the abdomen of the wearer. Therefore, the possibility that the mark of the abdominal-side upper elastic thread 23t is left on the wearer's skin due to excessive tightening pressure on the wearer's abdomen can be reduced.
It is desirable that the value (F3/H3) obtained by dividing the magnitude F3 of the force for extending the ventral core-side portion AC by the length H3 of the ventral core-side portion AC in the vertical direction is smaller than the value (F2/H2) obtained by dividing the magnitude F2 of the force for extending the ventral intermediate portion AM by the length H2 of the ventral intermediate portion AM in the vertical direction (F3/H3< F2/H2). That is, the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral core-side portion AC may be smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral intermediate portion AM. Therefore, the abdominal side intermediate portion AM can make the absorbent main body 10 fit better to the skin of the wearer than the abdominal side core portion AC. Therefore, the possibility of leakage of excrement from the upper side of the absorbent main body 10 can be reduced.
It is desirable that the value (F4/H1) obtained by dividing the magnitude F4 of the force for extending the back-side top part BU by the length H1 of the back-side top part BU in the vertical direction is smaller than the value (F6/H3) obtained by dividing the magnitude F6 of the force for extending the back-side core part BC by the length H3 of the back-side core part BC in the vertical direction (F4/H1< F6/H3). Since the back-side upper section BU overlaps the abdominal-side upper section AU having a length H1 in the vertical direction in the front-rear direction, the back-side upper section BU has a length H1 in the vertical direction. Since the back core-side BC overlaps the ventral core-side AC having a length H3 in the up-down direction in the front-back direction, the length of the back core-side BC in the up-down direction is H3. Further, as shown in fig. 6, it is desirable that the average value of the pitches Pj between the back-side upper elastic wires 33t is smaller than the average value of the pitches Pk between the back-side core-side elastic wires 33 d. That is, the back-side upper side portion BU can be more firmly attached around the waistline of the wearer than in the case where the contractive force of the back-side upper elastic thread 33t is smaller than the contractive force of the back-side core elastic thread 33 d. Therefore, the possibility of the diaper 1 falling down while wearing the diaper 1 can be reduced.
It is desirable that the average value of the pitch Pt between the abdominal-side upper elastic threads 23t is smaller than the average value of the pitch Pj between the back-side upper elastic threads 33t and the magnitude F1 of the force to elongate the abdominal-side upper side portion AU by a unit length in the left-right direction is smaller than or equal to the magnitude F4 of the force to elongate the back-side upper side portion BU by a unit length in the left-right direction (F1 ≦ F4). Therefore, in the diaper 1 in the pants-type state, the back-side upper side part BU forming a loop together with the abdomen-side upper side part AU is more strongly contacted with the skin of the wearer than the back-side core part BC. Therefore, at the upper end portion of the diaper 1, the abdominal-side upper side portion AU is in soft contact with the round abdominal side of the wearer, while the back-side upper side portion BU is in strong contact with the relatively flat back side of the wearer, with the result that the possibility of the diaper 1 falling down can be reduced.
The abdomen-side waist portion 20 has a joint portion corresponding to the adhesive portion H20 in the diaper 1, and the skin side sheet 21 and the non-skin side sheet 22 are joined by the joint portion. Fig. 7 is a view showing the joint portion of the abdomen-side waist portion 20 in fig. 3. In fig. 7, the elastic thread 23 is omitted for convenience. As shown in fig. 7, each of the plurality of adhesive portions H20 has a shape extending in the vertical direction and is arranged intermittently in the horizontal direction. The adhesive is continuously applied to the adhesive portion H20. The adhesive portion H20 made of the adhesive has high rigidity, so that the rigidity of the abdomen-side waist portion 20 in the up-down direction, particularly the rigidity of the abdomen-side upper side portion AU can be increased. The rigidity of the abdominal-side upper side portion AU is improved, so that the risk of curling of the upper end portion of the abdominal-side waist portion 20 can be further reduced. Note that the method for joining the skin side sheet 21 and the non-skin side sheet 22 is not limited to bonding by an adhesive. For example, welding, fusion, or the like may be employed. The joining portion does not need to be continuous, and a fusion portion, or the like arranged intermittently in the vertical direction may be used.
The contraction force, that is, the magnitude of the force to stretch the ventral upper portion AU by a unit length in the left-right direction F1, the magnitude of the force to stretch the ventral intermediate portion AM by a unit length in the left-right direction F2, the magnitude of the force to stretch the ventral core portion AC by a unit length in the left-right direction F3, the magnitude of the force to stretch the dorsal upper portion BU by a unit length in the left-right direction F4, and the magnitude of the force to stretch the dorsal core portion BC by a unit length in the left-right direction F6, can be measured using an automatic tensile testing machine (for example, AG-1KN1) manufactured by shimadzu corporation.
First, in the diaper 1 in the extended state, the length (extension dimension) in the left-right direction between the left-right direction inside portions of the joining region 2 of each of the abdomen-side waist portion 20 and the back-side waist portion 30 is measured in advance. Then, the joined portions on both sides in the left-right direction of the diaper 1 are cut together with the joined regions 2 by a cutter. And a ventral upper side portion AU, a ventral intermediate portion AM, and a ventral core side portion AC are cut from the ventral waistline portion 20, and a dorsal upper side portion BU and a dorsal core side portion BC are cut from the dorsal waistline portion 30, to prepare a sample.
When the abdominal-side upper side portion AU, the abdominal-side intermediate portion AM, and the abdominal-side core side portion AC are cut from the abdominal-side waistline portion 20, and when the back-side upper side portion BU and the back-side core side portion BC are cut from the back-side waistline portion 30, the cutting is performed together with the absorbent body 10 joined to the abdominal-side waistline portion 20 (back-side waistline portion 30). That is, a sample of the abdominal side intermediate section AM is prepared by cutting the abdominal side waist section 20 and a portion of the absorbent body 10 excluding the absorbent core 11A, and a sample of the abdominal side core section AC is prepared by cutting the abdominal side waist section 20 and a portion of the absorbent body 10 including the absorbent core 11A.
Next, one side end of each sample was clamped with a fixed chuck and the other side end was clamped with a movable chuck. After stretching the sample to a length of about 90% of the stretched dimension at a speed of 300mm/min, a tensile load (N) when the sample was contracted to a length of about 75% of the stretched dimension was obtained. Thereby, the tensile load is converted into a force per unit length (mm) (N/mm), so that a force for stretching the sample per unit length can be obtained.
The magnitude of the force stretching each section (AU, AM, AC, BU, BM, and BC) in the left-right direction may be adjusted not only by the thickness of the elastic thread but also by the spring constant of the elastic thread, the number of elastic threads, the type and number of materials laminated in each section (AU, AM, AC, BU, BM, and BC), and the like.
The present invention relates to a method for manufacturing a semiconductor device
Fig. 8 to 10 are schematic diagrams showing cross sections of modified examples of the abdomen-side waist portion 20. In the above embodiment, the skin-side elastic strands 23u and the non-skin-side elastic strands 23c are arranged as the elastic strands 23 in the abdomen-side waistline portion 20, and the folded-back portions 22u are provided on the skin side with respect to the skin-side elastic strands 23 u. However, the present invention is not limited thereto.
For example, as shown in fig. 8 and 9, such a configuration is acceptable: only the non-skin side elastic strands 23c are arranged as the abdomen side middle elastic strands 23m, and the skin side elastic strands 23u are not arranged. Although not shown, such a configuration is acceptable: only the skin-side elastic threads 23u are arranged as the abdomen-side intermediate elastic threads 23m and the non-skin-side elastic threads 23c are not arranged.
As shown in fig. 8, an upper side sheet portion 22s made of a member separate from the non-skin side sheet 22 may be provided on the skin side with respect to the skin side elastic thread 23 u. The upper side sheet portion 22s and the folded portion 22u may cover at least the skin-side elastic thread 23u from the skin side. As shown in fig. 8, even in the case where the skin-side elastic threads 23u are arranged in the abdomen-side upper region AU, the upper side sheet portion 22s (folded portion 22u) may be arranged within the range of the abdomen-side upper side portion AU and the abdomen-side intermediate portion AM. Similarly, the upper side sheet portion 22s (folded portion 22u) may be disposed within the range of the ventral upper side portion AU, the ventral intermediate portion AM, and the ventral core side portion AC.
As shown in fig. 9, the skin-side elastic threads 23u need not be arranged. Even in this case, in a state where the average value of the pitch Pt between the abdominal side upper elastic threads 23t is made smaller than the average value of the pitch Pd between the abdominal side core elastic threads 23d and thus the abdominal side upper side portion AU is more easily brought into contact with the skin surface of the wearer, making the contraction force acting in the left-right direction per unit length in the up-down direction of the abdominal side upper side portion AU smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the abdominal side core portion AC makes it possible to reduce the possibility of excessive pinching of the wearer at the abdominal side upper side portion AU. As shown in fig. 9, in the abdominal-side upper portion AU, when a plurality of members are superposed on each other on the skin side with respect to the abdominal-side upper elastic threads 23t like the skin side sheet 21 and the folded portion 22u (upper sheet portion 22s), even if the abdominal-side upper elastic threads 23t contract, the abdominal-side upper portion AU can be brought into relatively soft contact with the skin.
As shown in fig. 10, not only the non-skin side sheet 22 but also the skin side sheet 21 may have a folded back portion. Such a structure makes it possible to use more material in the upper end portion of the abdominal-side waistline portion 20. Therefore, it is possible to further alleviate the skin contact caused by the contraction of the abdominal side upper elastic threads 23t and reduce the possibility that the abdominal side upper elastic threads 23t excessively pinch the wearer's skin.
In the second embodiment, the first embodiment is described as follows
A second embodiment will be described taking a disposable diaper for infants as an example of a pants-type absorbent article according to the present invention. However, the pants-type absorbent article according to the present invention is not limited to disposable diapers for infants, but is also applicable to, for example, pants for adults and sanitary pants. In the following description, the skin-side elastic strands 23u are also referred to as "upper-side elastic strands 23 u", and the non-skin-side elastic strands 23c are also referred to as "core-side elastic strands 23 c".
The disposable diaper 1 has a structure of pants type
Fig. 11 is a perspective view of a pants-type disposable diaper 1 (hereinafter referred to as "diaper"). Fig. 12 is a schematic plan view of the diaper 1 in an unfolded state and in an elongated state when viewed from the skin-side surface side. The "developed state" refers to a state in which the entire diaper 1 is developed flatly by separating and opening the two joined regions 2 of the both side portions of the diaper 1 in the pants-type state (i.e., the two joined regions 2 joining the both side end portions of the abdomen-side waistline portion 20 and the both side end portions of the back-side waistline portion 30). The "stretched state" refers to a state in which the stretchable member of the diaper 1 is stretched so that wrinkles are not visible. Specifically, the "extended state" refers to a state in which the dimensions of the respective members (for example, the abdomen-side waist portion 20 described later) constituting the diaper 1 match or are close to the dimensions of the members themselves. The line C-C in fig. 12 is the center line in the left-right direction.
In the pants-type state shown in fig. 11, the diaper 1 has a vertical direction, a horizontal direction, and a front-rear direction, and has a waistline opening BH and a pair of leg hole openings LH. In the up-down direction, the waistline opening BH side is the upper side, and the crotch side is the lower side. The direction in which the materials constituting the diaper 1 are laminated is the thickness direction. In the thickness direction, the side in contact with the wearer is the skin side, and the opposite side is the non-skin side. The front-back direction of the diaper 1 in the pants-type state corresponds to the thickness direction of the diaper 1 in the developed state.
The diaper 1 is a so-called three-piece type and includes an absorbent main body 10, an abdominal-side waistline portion 20, and a back-side waistline portion 30. The abdomen-side waistline portion 20 covers the abdomen side of the wearer, and the back-side waistline portion 30 covers the back side of the wearer.
In the diaper 1 in the developed state shown in fig. 12, the abdominal-side waistline portion 20 and the back-side waistline portion 30 are arranged in such a manner that the longitudinal direction thereof is along the left-right direction of the diaper 1. The abdomen-side waist portion 20 is joined at a central portion in the left-right direction to one end portion in the longitudinal direction of the absorbent main body 10 by an adhesive portion H10 (fig. 15) such as a hot melt adhesive, and the back-side waist portion 30 is joined at a central portion in the left-right direction to the other end portion in the longitudinal direction of the absorbent main body 10 by an adhesive portion H10 (fig. 15). As a pattern of the adhesive applied in the adhesive portion H10, there is a known pattern such as a stripe pattern, a spiral pattern, an Ω -shaped pattern, or the like. The method of joining the abdominal-side waistline portion 20 and the back-side waistline portion 30 to the absorbent main body 10 is not limited to the method using the adhesive, and a welded region fixed by thermal welding, ultrasonic welding, or the like may be employed.
The diaper 1 in the developed state shown in fig. 12 has a shape symmetrical in the left-right direction with respect to the center line C-C. The absorbent main body 10 is folded in half at substantially the center C10 in the longitudinal direction so that the longitudinal direction of the absorbent main body 10 is along the up-down direction of the diaper 1, and both side end portions of the abdomen-side waistline portion 20 in the left-right direction of the diaper 1 and both side end portions of the back-side waistline portion 30 in the left-right direction of the diaper 1 are joined by means of such as thermal welding or ultrasonic welding, with the result that a pair of joined regions 2 is formed. Thus, the diaper 1 in the pants-type state shown in fig. 11 is produced.
The absorbent main body 10 includes: an absorbent body 11; a liquid-permeable top sheet 12 disposed on the skin side with respect to the absorbent body 11; a liquid-impermeable back sheet 13 disposed on the non-skin side with respect to the absorbent body 11; an exterior sheet 14 disposed on the non-skin side with respect to the back sheet 13.
The absorber 11 has a substantially rectangular shape in plan view, and includes: an absorbent core 11A that absorbs and retains excretory fluid such as urine; a liquid-permeable core wrap sheet 11B covering the absorbent core 11A. An example of the absorbent core 11A is a molded body made of liquid absorbent fibers (e.g., pulp containing Super Absorbent Polymer (SAP)) or the like, and the molded body is shaped into a predetermined shape such as a substantially hourglass shape in a plan view. Examples of the core wrap sheet 11B are liquid-permeable sheets such as toilet paper, nonwoven fabric, and the like.
As shown in fig. 12, leg elastic members 15 are provided at both ends in the left-right direction of the absorbent main body 10 so that the diaper 1 fits around the legs of the wearer. The leg hole elastic members 15 are fixed between the two outer sheets 14 folded back inward in the left-right direction, for example, in a state of being extended in the longitudinal direction of the absorbent main body 10. The leg elastic members 15 are exemplified by elastic threads and stretchable sheets.
The abdomen-side waist portion 20 includes: a skin side sheet (skin side sheet) 21, a non-skin side sheet 22, and a plurality of elastic threads 23. The back waist portion 30 includes a skin side sheet 31, a non-skin side sheet 32, and a plurality of elastic strands 33. The skin side sheets 21 and 31 are joined to the non-skin side sheets 22 and 32, respectively, with an adhesive such as a hot melt adhesive. The plurality of elastic threads 23 and 33 will be described in detail later.
The non-skin side sheets 22 and 32 are disposed on the non-skin side with respect to the skin side sheets 21 and 31. The skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 are disposed on the non-skin side with respect to the absorbent main body 10. In order to improve texture and durability, the upper end portions of the non-skin side sheets 22 and 32 respectively constitute folded- back portions 22u and 32u folded back downward. The non-skin side sheet 22 includes a non-skin side sheet portion 22n and a folded-back portion 22 u.
As for the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32, non-stretchable sheets such as SMS nonwoven fabric (spunbond/meltblown/spunbond nonwoven fabric), spunbond nonwoven fabric, air-through nonwoven fabric, plastic sheet, perforated plastic sheet and laminated sheet made by laminating such sheets or fabrics can be used.
The abdomen-side waist portion 20 includes a sheet member 24 located on the skin side with respect to the folded-back portion 22 u. The sheet member 24 is joined to the absorbent main body 10 and the folded-back portion 22u by an adhesive portion H24 (see fig. 15) so as to straddle the upper end of the abdomen side of the absorbent main body 10. Likewise, the back-side waistline portion 30 includes a sheet member 34 located on the skin side with respect to the folded back portion 32 u. The sheet member 34 is joined to the absorbent main body 10, the folded back portion 32u, and the skin side sheet 31 with an adhesive H34 (see fig. 16) so as to straddle the back-side upper end of the absorbent main body 10. The sheet members 24 and 34 are rectangular sheet members made of nonwoven fabric or the like. The sheet members 24 and 34 can prevent the end portions of the absorbent main body 10 in the up-down direction from directly contacting the skin of the wearer, and can achieve better feeling of the abdomen-side waist portion 20 and the back-side waist portion 30 when the diaper 1 is worn. Also, the sheet members 24 and 34 allow the abdomen-side waistline portion 20 and the back-side waistline portion 30 to be more firmly joined to the absorbent main body 10.
The elastic threads 23 and 33 are also referred to as elastic threads
Fig. 13 is an enlarged view of the abdominal-side waistline portion 20 in fig. 12. Fig. 14 is an enlarged view of the back-side waistline portion 30 in fig. 12. A plurality of elastic threads 23(33) coated with an adhesive such as a hot-melt adhesive are arranged in parallel between the skin side sheets 21(31) and the non-skin side sheets 22(32) in a region from the upper end to the lower end of the skin side sheets 21(31) and the non-skin side sheets 22(32), and the elastic threads 23(33) are fixed in a state of being stretched in the left-right direction. Therefore, the abdominal-side waistline portion 20 and the back-side waistline portion 30 are joined to each other and stretched in the left-right direction, fitting around the waistline of the wearer.
As shown in fig. 13, the abdominal-side waistline portion 20 includes an abdominal-side upper side portion AU, an abdominal-side intermediate portion AM, and an abdominal-side core portion AC in this order from the upper side. Specifically, the abdominal-side upper side portion AU is a rectangular region located above the absorbent main body 10 in the vertical direction in the abdominal-side waistline portion 20. The abdominal-side core side portion AC is a rectangular region overlapping with the absorbent core 11A in the front-rear direction in the abdominal-side waistline portion 20. The stomach-side intermediate portion AM is a rectangular region overlapping the absorbent main body 10 and located above the absorbent core 11A.
As shown in fig. 14, the back-side waistline portion 30 includes a back-side upper side portion BU, a back-side intermediate portion BM, and a back-side core side portion BC in this order from the upper side. Specifically, in the diaper 1 in the pants-type state, a region of the back-side waistline portion 30 that overlaps with the abdominal-side upper side portion AU of the abdominal-side waistline portion 20 in the front-rear direction is the back-side upper side portion BU. Further, a region of the back-side waistline portion 30 which overlaps with the abdominal-side intermediate portion AM of the abdominal-side waistline portion 20 in the front-rear direction is a back-side intermediate portion BM, and a region of the back-side waistline portion 30 which overlaps with the abdominal-side core-side portion AC of the abdominal-side waistline portion 20 in the front-rear direction is a back-side core-side portion BC.
Fig. 15 is a schematic view of a cross section viewed along an arrow a-a in fig. 3. Fig. 16 is a schematic view of a cross section viewed along an arrow B-B in fig. 14. In fig. 15 and 16, the dimensions are appropriately changed for the purpose of facilitating understanding of the structure relating to the thickness direction.
As shown in fig. 15, the abdomen-side waistline portion 20 includes, in order from the skin side, a sheet member 24, a folded portion 22u, an upper elastic thread 23u, a skin side sheet 21, a core-side elastic thread 23c, an adhesive portion (joint portion) H20, and a non-skin side sheet portion 22 n. Of the elastic threads 23 of the abdominal-side waistline portion 20, the upper elastic threads 23u are disposed in the abdominal-side upper side portions AU and the abdominal-side intermediate portions AM, and the core-side elastic threads 23c are disposed in the abdominal-side core side portions AC and the abdominal-side intermediate portions AM. The upper elastic threads 23u and the core-side elastic threads 23c disposed in the ventral middle portion AM are also referred to as "middle elastic threads 23 m". The folded portion 22u is also referred to as an "upper side sheet portion 22 s" provided on the skin side with respect to the upper elastic thread 23 u.
As shown in fig. 16, the back-side waistline portion 30 includes, in order from the skin side, a sheet member 34, a folded-back portion 32u, a skin-side sheet 31, elastic threads 33, and a non-skin-side sheet portion 32 n. The elastic strands 33 of the back waistline portion 30 do not include upper elastic strands such as the upper elastic strands of the abdomen waistline portion 20.
In the front-rear direction, the upper elastic threads 23u are disposed on the skin side with respect to the skin side sheet 21 and on the non-skin side with respect to the folded-back portions 22u and with respect to the absorbent main body 10. In the front-rear direction, the core-side elastic threads 23c are disposed on the non-skin side with respect to the skin-side sheet 21, on the skin side with respect to the non-skin-side sheet portion 22n, and on the non-skin side with respect to the absorbent main body 10. That is, the upper elastic strands 23u are disposed on the skin side with respect to the skin side sheet 21 and the core-side elastic strands 23c are disposed on the non-skin side with respect to the skin side sheet 21 such that the upper elastic strands 23u are located on the skin side with respect to the core-side elastic strands 23 c. In the abdominal-side upper side portion AU, the skin side sheet 21, the adhesive portion H20, and the non-skin side sheet portion 22n are disposed on the non-skin side with respect to the upper elastic thread 23 u. As shown in fig. 12 and 13, the upper elastic strands 23u and the core elastic strands 23c, which are the intermediate elastic strands 23m, extend continuously from one end portion to the other end portion in the left-right direction of the abdomen-side waistline portion 20.
By arranging the upper side elastic threads 23u and the core side elastic threads 23c in this manner, when the diaper 1 in a pants-type state, particularly in a state of being worn, is viewed from the non-skin side, the upper side elastic threads 23u can be seen through more material than the core side elastic threads 23 c. Therefore, the upper elastic threads 23u in the abdominal-side upper side portion AU can be made less visible than the core-side elastic threads 23 c.
Generally, the elastic threads of the waist portion of the conventional pants-type disposable diaper are arranged between the skin side sheet and the non-skin side sheet like the back-side waist portion 30. However, in the conventional pants-type disposable diaper, the upper end portion of the waist portion, which does not have a portion overlapping the absorbent main body in the up-down direction, tends to be regarded as receiving a strong contractive force of the elastic thread. This may give the wearer the impression that the upper end portion of the waist portion is excessively cramped when the diaper 1 is viewed from the non-skin side. In particular, when the abdomen of a wearer such as an infant protrudes in the forward direction, the wearer is liable to have an impression that the abdominal side is excessively cramped.
In this regard, in the diaper 1 of the present embodiment, the upper elastic threads 23u in the abdominal-side upper side portion AU are made visually less recognizable than the core-side elastic threads 23c, so that the wearer can more easily have the impression that the diaper 1 fits the wearer softly without the waistline being excessively compressed. Providing the core-side elastic thread 23c that is more visually recognizable than the upper-side elastic thread 23u can give the wearer the impression that the abdominal-side upper-side portion AU fits the wearer's abdomen softly, while making the wearer more likely to develop the impression that the strong contractive force of the core-side elastic thread 23c acts on the abdominal-side core-side portion AC. Therefore, even if the diaper 1 is a diaper which fits softly around the waistline of the wearer, the absorbent core 11A fits better to the body of the wearer to increase the possibility of the wearer giving the impression of reduced possibility of leakage of excrement from the diaper 1.
Since the intermediate elastic strands 23m are arranged in the abdomen-side intermediate portion AM, contraction of the intermediate elastic strands 23m makes it easier for the absorbent main body 10 to fit the abdomen of the wearer. Further, since the abdomen-side intermediate portion AM includes the upper elastic threads 23u and the core-side elastic threads 23c as the intermediate elastic threads 23m, the absorbent main body 10 is easily attached to the abdomen of the wearer. Since the abdominal-side middle section AM is the upper end portion on the abdominal side of the absorbent main body 10, the upper end portion on the abdominal side of the absorbent main body 10 can be brought into stronger contact with the skin of the wearer, and the possibility of leakage of excrement from the upper end portion on the abdominal side of the absorbent main body 10 can be reduced. Since the intermediate elastic threads 23m continuously provided from one end portion to the other end portion in the left-right direction of the abdomen-side waistline portion 20 are provided, the upper end portion on the abdomen side of the absorbent main body 10 can be easily brought into close contact with the skin of the wearer and the absorbent main body 10 can be brought into a fitted state with respect to the body of the wearer.
Preferably, in the abdominal-side upper side portion AU, the skin side sheet 21 is attached to the non-skin side sheet portion 22n with an adhesive portion H20 such as a hot-melt adhesive. In the abdomen-side upper side portion AU, there is a risk that the upper end portion of the abdomen-side waist portion 20 sags in a curled manner due to contraction of the upper elastic thread 23 u. In this regard, in the abdominal-side upper side portion AU, the rigidity of the adhesive portion H20 can be increased by adhering the skin side sheet 21 to the non-skin side sheet portion 22n using an adhesive, thereby increasing the rigidity of the abdominal-side upper side portion AU, so that the risk of curling of the upper end portion of the abdominal-side waist body portion 20 can be reduced. Note that the bonding portion H20 is not limited to a bonding portion by an adhesive, and for example, a bonding portion by such as thermal welding, ultrasonic fusion, or the like may be employed.
The abdomen-side waist portion 20 has a joint portion corresponding to the adhesive portion H20 in the diaper 1, and the skin side sheet 21 and the non-skin side sheet 22 are joined at the joint portion. Fig. 17 is a view showing a joint portion of the abdominal-side waistline portion 20 in fig. 13. In fig. 17, the elastic thread 23 is omitted for convenience. As shown in fig. 17, each of the plurality of adhesive portions H20 has a shape extending in the vertical direction and is arranged intermittently in the horizontal direction. The adhesive is continuously applied to the adhesive portion H20. The adhesive portion H20 made of the adhesive has high rigidity, so that the rigidity of the abdomen-side waist portion 20 in the up-down direction, particularly the rigidity of the abdomen-side upper side portion AU can be increased. The rigidity of the abdominal-side upper side portion AU is improved, so that the risk of curling of the upper end portion of the abdominal-side waist portion 20 can be further reduced. As shown in fig. 17, the length of the bonding portion H20 in the left-right direction is set to be smaller than the distance between two adjacent bonding portions H20. This can reduce the risk of the adhesive excessively hardening the ventral upper side portion AU, compared to the case where the length of the adhesive portion H20 in the left-right direction is set to be larger than the distance between two adjacent adhesive portions H20. Note that the method for joining the skin side sheet 21 and the non-skin side sheet 22 is not limited to bonding by an adhesive. For example, welding, fusion, or the like may be employed. Further, the joining portion does not have to be continuous, and a fusion portion or a fusion portion arranged intermittently in the vertical direction may be used.
The lower end of the folded portion 22u is positioned below the upper end of the absorbent main body 10. That is, the folded portion 22u is disposed not only in the abdomen-side upper side portion AU but also in the abdomen-side intermediate portion AM. This makes it possible to reduce the difference in rigidity in the upper end of the absorbent main body 10 caused by the upper end portion of the absorbent main body 10 having higher rigidity. Therefore, the possibility of bending at the upper end of the absorbent main body 10 as a boundary can be reduced.
Desirably, a value (F1/H1) obtained by dividing the magnitude F1 of the force for extending the abdominal side upper section AU by the unit length in the left-right direction by the length H1 in the up-down direction of the abdominal side upper section AU is smaller than a value (F2/H2) obtained by dividing the magnitude F2 of the force for extending the abdominal side intermediate section AM by the unit length in the left-right direction by the length H2 in the up-down direction of the abdominal side intermediate section AM (F1/H1< F2/H2).
A force for causing elongation in the left-right direction, that is, an "elongation force" in the left-right direction is a "contraction force" in the left-right direction. Therefore, when the stomach-side upper side portion AU is expanded outward in the left-right direction by a predetermined force, the stomach-side upper side portion AU tries to contract inward in the left-right direction. The force acting inward in the left-right direction is a "contraction force". For example, the extension force required to bring the diaper 1 in its natural state into an extended state is equal to the contraction force to return the diaper 1 in its extended state to its natural state. Instead of the "elongation force", a "contraction force" may be used below.
That is, the contraction force acting in the left-right direction per unit length in the up-down direction of the abdomen-side upper side portion AU is made smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the abdomen-side middle portion AM. Therefore, the abdominal side upper side portion AU can be brought into soft contact with the skin of the wearer, and the abdominal side intermediate portion AM can be made to fit the skin of the wearer better. On the one hand, in the abdominal side middle portion AM, the absorbent main body 10 can be brought into stronger contact with the wearer's skin to reduce the possibility of leakage of excrement, and on the other hand, in the abdominal side upper portion AU, the possibility of the elastic thread 23 leaving marks on the wearer's skin due to excessive pressure on the wearer's skin can be reduced.
Desirably, a value (F3/H3) obtained by dividing the magnitude F3 of the force for horizontally extending the ventral core-side portion AC by the length H3 of the ventral core-side portion AC in the vertical direction is smaller than a value (F2/H2) obtained by dividing the magnitude F2 of the force for horizontally extending the ventral intermediate portion AM by the length H2 of the ventral intermediate portion AM in the vertical direction (F3/H3< F2/H2). That is, the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral core-side portion AC is smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral intermediate portion AM. Thus, the abdominal side middle section AM can make the absorbent main body 10 fit better to the skin of the wearer than the abdominal side core section AC. Therefore, the possibility of leakage of excrement from the upper side of the absorbent main body 10 can be reduced.
Desirably, a value (F1/H1) obtained by dividing the magnitude F1 of the force for extending the ventral upper portion AU by the unit length in the left-right direction by the length H1 in the up-down direction of the ventral upper portion AU is smaller than a value (F3/H3) obtained by dividing the magnitude F3 of the force for extending the ventral core AC by the unit length in the left-right direction by the length H3 in the up-down direction of the ventral core AC (F1/H1< F3/H3). That is, it is desirable that the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral upper portion AU is smaller than the contraction force acting in the left-right direction per unit length in the up-down direction of the ventral core portion AC. Therefore, in the abdominal-side upper side portion AU, the possibility that the elastic threads 23 mark the skin of the wearer due to excessive tightening pressure on the skin of the wearer can be reduced, and the absorbent core 11A can be better fitted to the skin of the wearer in the abdominal-side core-side portion AC. Therefore, the possibility of leakage of excrement can be further reduced.
The contraction force, that is, the magnitude of the force of stretching the ventral upper portion AU by a unit length in the left-right direction F1, the magnitude of the force of stretching the ventral intermediate portion AM by a unit length in the left-right direction F2, and the magnitude of the force of stretching the ventral core portion AC by a unit length in the left-right direction F3 can be measured using an automatic tensile testing machine (e.g., AG-1KN1) manufactured by shimadzu corporation. First, in the diaper 1 in the extended state, the length (extension dimension) in the left-right direction between the left-right direction inner side portions of the joining region 2 of the abdomen-side waist portion 20 is measured in advance. Then, the joined portions on both sides in the left-right direction of the diaper 1 are cut together with the joined regions 2 with a cutter, and the abdominal side upper side portion AU, the abdominal side intermediate portion AM, and the abdominal side core portion AC are cut from the abdominal side waistline portion 20 to prepare a sample.
When the abdominal side upper side portion AU, the abdominal side intermediate portion AM, and the abdominal side core side portion AC are cut from the abdominal side waistline portion 20, the cutting is performed together with the absorbent main body 10 joined to the abdominal side waistline portion 20. That is, a sample of the abdominal side intermediate section AM is prepared by cutting the abdominal side waist section 20 and a portion of the absorbent body 10 excluding the absorbent core 11A, and a sample of the abdominal side core section AC is prepared by cutting the abdominal side waist section 20 and a portion of the absorbent body 10 including the absorbent core 11A.
Next, one side end of each sample was clamped with a fixed chuck and the other side end was clamped with a movable chuck. After stretching the sample to a length of about 90% of the stretched dimension at a speed of 300mm/min, a tensile load (N) when the sample was contracted to a length of about 75% of the stretched dimension was obtained. Thereby, the tensile load is converted into a force per unit length (mm) (N/mm), so that a force for stretching the sample per unit length can be obtained.
The magnitude of the force stretching the respective portions (AU, AM, and AC) in the left-right direction can be adjusted by the thickness of the elastic thread, the spring constant of the elastic thread, the number of elastic threads, and the like.
The present invention relates to a method for manufacturing a semiconductor device
Fig. 18 to 22 are schematic diagrams showing cross sections of modified examples of the abdomen-side waist portion 20. In the above embodiment, the upper elastic threads 23u are disposed in the abdominal side upper side portion AU and the abdominal side intermediate portion AM, the core elastic threads 23c are disposed in the abdominal side core portion AC and the abdominal side intermediate portion AM, and the folded portion 22u is provided on the skin side with respect to the upper elastic threads 23 u. However, the present invention is not limited thereto.
For example, as shown in fig. 18, the following configuration may be adopted: the upper elastic thread 23u is disposed in the ventral upper side portion AU; the upper elastic threads 23u are not arranged in the ventral medial portion AM and the ventral core-side portion AC; the core-side elastic threads 23c are disposed in the ventral-side core-side portion AC and the ventral-side intermediate portion AM; and the core-side elastic thread 23c is not arranged in the ventral upper side portion AU. In such a structure, the diaper 1 in the pants-type state has an impression that the elastic threads 23(23u) at the upper end portion of the abdomen-side waistline portion 20 are hardly visually recognized and the diaper 1 is in soft contact with the abdomen of the wearer, and the elastic threads 23(23c) provided at the portion overlapping the absorbent main body 10 in the front-rear direction can easily give an impression that the absorbent main body 10 is in a structure in which the leakage of excrement is difficult by more firmly fitting the absorbent main body 10 to the body of the wearer.
As shown in fig. 19, an upper side sheet portion 22s made of a member separate from the non-skin side sheet 22 is provided on the skin side with respect to the upper elastic threads 23 u. The upper side sheet portion 22s and the folded portion 22u need not be disposed only in the region where the upper elastic thread 23u is disposed. The upper sheet portion 22s and the folded portion 22u may cover at least the upper elastic thread 23u from the skin side. As shown in fig. 19, even in the case where the upper elastic threads 23u are disposed in the abdomen-side upper region AU, the upper side sheet portion 22s (folded portion 22u) may be disposed within the range of the abdomen-side upper portion AU and the abdomen-side intermediate portion AM. Similarly, in the case where the upper elastic threads 23u are disposed in the abdominal side upper region AU, the upper side sheet portion 22s (folded portion 22u) may be disposed within the range of the abdominal side upper portion AU, the abdominal side intermediate portion AM, and the abdominal side core portion AC.
As shown in fig. 20, a configuration may also be adopted in which the upper elastic threads 23u are disposed in the ventral upper side portion AU and the ventral intermediate portion AM, and the core-side elastic threads 23c are disposed in the ventral core-side portion AC. As a result, in the diaper 1 in the pants-type state, the number of the upper elastic threads 23u that is difficult to visually recognize from the non-skin side is increased, and the impression that the abdomen-side waist portion 20 is in soft contact with the skin of the wearer is more likely to occur. Both the folded-back portion 22u and the upper side sheet portion 22s may be included.
As shown in fig. 21, the upper elastic threads 23u may be disposed in the ventral upper side portion AU, the ventral intermediate portion AM, and the ventral core side portion AC. A larger number of elastic threads may be disposed than in the case where elastic threads are disposed between the skin side sheet 21 and the non-skin side sheet 22 in the conventional diaper. This allows the absorbent main body 10, particularly the absorbent core 11A, to fit the wearer's skin, so that the risk of leakage of excrement can be reduced.
As shown in fig. 22, not only the non-skin side sheet 22 but also the skin side sheet 21 may include a folded-back portion. This configuration can improve the rigidity of the upper end portion of the abdomen-side waist portion 20, so that the risk of the upper end portion of the abdomen-side waist portion 20 curling can be reduced.
The above-described embodiments of the present invention include the following form of pants-type absorbent article, and overcome the following problems.
Pants-type disposable diapers are known as pants-type absorbent articles. For example, patent document 1 discloses a pants-type disposable diaper 1 including a belly-side sheet member 2, a back-side sheet member 3, and an absorbent core 5. Each of the stomach-side sheet member 2 and the back-side sheet member 3 includes an elastic member 7 that is extensible in the width direction. The waist elastic member 7W is disposed above the upper end 5W of the absorbent core 5 to prevent the diaper from slipping down.
However, in patent document 1, the waist elastic member 7W of the pants-type disposable diaper 1 in a worn state is easily visible. Therefore, particularly when an infant having a round abdomen portion wears the diaper, the wearer is likely to have an impression that the waistline elastic member 7W excessively presses the waistline of the wearer.
In view of the conventional problems such as described above, a pants-type absorbent article of the following form is realized, and an object is to provide a pants-type absorbent article which easily gives the wearer the impression that the pants-type absorbent article fits softly around the waist of the wearer. The following form of pant-type absorbent article is also included in the above-described embodiments of the present invention.
< first form >
A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, and
the pants-type absorbent article includes:
an absorbent body including an absorbent core and a pair of waist sections,
each waist body portion includes: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads which are capable of stretching in the left-right direction,
at least one of the pair of waistlines includes: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction,
the plurality of elastic threads comprises: an upper elastic thread disposed at the upper side portion; and core-side elastic threads disposed at the core-side portion,
the upper side portion includes an upper side sheet portion located on the skin side with respect to the skin side sheet portion,
in the front-to-rear direction,
the upper elastic thread is arranged on the skin side with respect to the skin-side sheet portion and on the non-skin side with respect to the upper sheet portion, and
the core-side elastic thread is disposed on a non-skin side with respect to the skin-side sheet portion and on a skin side with respect to the non-skin-side sheet portion.
According to the pants-type absorbent article of the first aspect, when the pants-type absorbent article is viewed from the non-skin side, the upper side elastic threads of the waist portion are more difficult to visually recognize than the core side elastic threads, so that it is easier to give the impression that the upper side portion fits softly around the waist portion to the wearer.
< second form >
The pants-type absorbent article according to the first aspect, wherein the upper side portion has a joint portion by which the skin side panel portion and the non-skin side panel portion are joined.
According to the pants-type absorbent article of the second aspect, the rigidity of the upper side portion can be further improved, so that the risk of the upper side portion curling in the up-down direction due to contraction of the elastic thread can be reduced.
< third mode >
Pant-type absorbent article according to a first form and a second form, wherein,
the waistline portion includes an intermediate portion that overlaps with the absorbent main body in the front-back direction and is located above the absorbent core in the up-down direction, and
the plurality of elastic strands includes a middle elastic strand disposed in the middle portion.
According to the third form of the pant-type absorbent article, the intermediate elastic threads make the intermediate portion more easily fit to the body of the wearer.
< fourth form >
The pant-type absorbent article according to a third form wherein the intermediate elastic thread is disposed on the skin side with respect to the skin-side panel portion and on the non-skin side with respect to the upper-side panel portion.
According to the pants-type absorbent article of the fourth aspect, when the pants-type absorbent article is viewed from the non-skin side, it is difficult to visually recognize a large number of elastic threads among the elastic threads provided on the waist portion. This makes it easier to give the wearer the impression that the waistline portion fits softly around the waistline of the wearer.
< fifth form >
The pant-type absorbent article according to a third form wherein the intermediate elastic thread is disposed on a non-skin side with respect to the skin-side panel portion and on a skin side with respect to the non-skin side panel portion.
According to the pants-type absorbent article of the fifth form, the elastic threads at a portion of the waist portion overlapping the absorbent main body in the front-rear direction are easily visible, so that the wearer is more easily given the impression that the absorbent main body fits the body and excrement hardly leaks.
< sixth form >
A pant-type absorbent article according to any one of the third to fifth forms, wherein,
some of the intermediate elastic threads are arranged on the skin side with respect to the skin-side sheet portion and on the non-skin side with respect to the upper-side sheet portion, and
some of the intermediate elastic threads are arranged on a non-skin side with respect to the skin-side sheet portion and on a skin side with respect to the non-skin-side sheet portion.
According to the pant-type absorbent article of the sixth form, the intermediate portion can better conform to the skin of the wearer due to the elastic threads disposed on the skin side with respect to the skin-side panel portion and due to the elastic threads disposed on the non-skin side with respect to the skin-side panel portion. Thus, the risk of leakage of excrement from the upper side of the absorbent body can be reduced.
< seventh mode >
The pant-type absorbent article according to any one of the third to sixth aspects, wherein a value obtained by dividing a magnitude of a force by which the upper side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the upper side portion is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is extended by a unit length in the left-right direction by a length in the up-down direction of the intermediate portion.
According to the pants-type absorbent article of the seventh aspect, the risk of leakage of excrement from the absorbent main body can be reduced and the upper end portion can also be prevented from leaving a line mark on the skin of the wearer, so that the intermediate portion fits better to the skin of the wearer while the upper side portion is brought into soft contact with the skin of the wearer.
< eighth mode >
The pant-type absorbent article according to any one of the third to seventh aspects, wherein a value obtained by dividing a magnitude of a force by which the core side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the core side portion is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is extended by a unit length in the left-right direction by a length in the up-down direction of the intermediate portion.
According to the pants-type absorbent article of the eighth aspect, the risk of leakage of excrement from the upper side of the absorbent main body can be reduced by fitting the intermediate portion more closely to the skin of the wearer than the core side portion.
< ninth form >
The pant-type absorbent article according to any one of the third to eighth aspects, wherein a value obtained by dividing a magnitude of a force by which the upper side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the upper side portion is smaller than a value obtained by dividing a magnitude of a force by which the core side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the core side portion.
According to the pants-type absorbent article of the ninth aspect, the risk of leakage of excrement from the absorbent core can be reduced and the upper end portion can be prevented from leaving a line mark on the skin of the wearer by making the core side portion fit better to the skin of the wearer while making the upper side portion contact softly with the skin of the wearer.
< tenth mode >
The pant-type absorbent article according to any one of the first to ninth forms, wherein,
the upper side sheet is a part formed by folding back the upper end of the non-skin side sheet toward the skin side, and
the lower end of the upper side sheet portion is located below the upper end of the absorbent main body.
According to the pants-type absorbent article of the tenth form, the difference in rigidity of the upper end of the absorbent main body can be reduced, so that the risk of bending at the upper end of the absorbent main body as a boundary can be reduced.
< eleventh mode >
The pant-type absorbent article according to any one of the first to tenth forms, wherein,
the one waist-body portion has a joint portion by which the skin-side sheet portion and the non-skin-side sheet portion are joined,
the joint portion has a shape extending in the up-down direction, and
a plurality of the engaging portions are intermittently arranged in the left-right direction.
According to the pants-type absorbent article of the eleventh aspect, the use of the joined portions can increase the rigidity of the waist portion in the vertical direction, so that the risk of the waist portion curling in the vertical direction due to contraction of the elastic thread can be reduced.
The above embodiments of the present invention include the following form of a pants-type absorbent article.
< twelfth form >
A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, and
the pants-type absorbent article includes: an absorbent body comprising an absorbent core; and a pair of waist parts, wherein,
each waist body portion includes: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads which are capable of stretching in the left-right direction,
at least one of the pair of waistlines includes: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction,
the plurality of elastic threads comprises: an upper elastic thread disposed at the upper side portion; and a core-side elastic thread disposed at the core-side portion, wherein,
the upper side portion includes an upper side sheet portion located on the skin side with respect to the skin side sheet portion,
in the front-to-rear direction,
the upper elastic thread is arranged on the skin side with respect to the skin-side sheet portion and on the non-skin side with respect to the upper sheet portion,
the core-side elastic thread is disposed on a non-skin side with respect to the skin-side sheet portion and on a skin side with respect to the non-skin-side sheet portion,
the one waistline portion includes an intermediate portion that overlaps with the absorbent main body in the front-back direction and is located above the absorbent core in the up-down direction,
the plurality of elastic strands includes a middle elastic strand disposed in the middle portion,
the intermediate elastic thread is provided so as to extend continuously from one end portion to the other end portion of the one waist portion in the left-right direction.
According to the pants-type absorbent article of the twelfth aspect, when the pants-type absorbent article is viewed from the non-skin side, it is more difficult to visually recognize the upper side elastic threads at the waist portion than the core side elastic threads, so that the wearer is more likely to have an impression that the upper side end portions fit around the waist softly. The intermediate elastic threads make it easier to bring the intermediate portion into closer contact with the wearer's skin, so that the absorbent body can be fitted to the wearer's body.
< thirteenth form >
In the pant-type absorbent article according to the twelfth form,
the upper side portion has a joining portion by which the skin-side sheet portion and the non-skin-side sheet portion are joined,
the joint portion has a shape extending along the vertical direction, and a plurality of the joint portions are intermittently arranged in the lateral direction.
According to the pants-type absorbent article of the thirteenth aspect, the use of the joined portion can increase the rigidity of the waist portion in the vertical direction, so that the risk of the waist portion curling in the vertical direction due to contraction of the elastic thread can be reduced.
< fourteenth form >
In the pant-type absorbent article according to the thirteenth form, a length of each joint in the left-right direction is smaller than a distance between two adjacent joints.
According to the pant-type absorbent article of the fourteenth aspect, the risk of the upper side portion becoming too stiff due to the joined portions can be reduced as compared to the case where the length of each joined portion in the left-right direction is greater than the distance between two adjacent joined portions.
< fifteenth form >
The pant-type absorbent article according to any one of the twelfth to fourteenth forms, wherein the intermediate elastic thread is disposed on a skin side with respect to the skin-side panel portion and on a non-skin side with respect to the upper-side panel portion.
According to the pant-type absorbent article of the fifteenth aspect, it becomes more difficult to visually recognize a larger number of elastic threads among the elastic threads provided at the waist portion when the pant-type absorbent article is viewed from the non-skin side. This makes it easier to give the wearer the impression that the waist portion fits softly around the waist of the wearer.
< sixteenth form >
The pant-type absorbent article according to any one of the twelfth to fourteenth forms, wherein the intermediate elastic thread is disposed on a non-skin side with respect to the skin-side panel portion and on a skin side with respect to the non-skin-side panel portion.
According to the pant-type absorbent article of the sixteenth form, the elastic threads at a portion of the waistline portion that overlaps with the absorbent main body in the front-to-back direction are easily visible, so that it is easier to give the wearer the impression that the absorbent main body fits the body and that excrement hardly leaks.
< seventeenth form >
The pant-type absorbent article according to any one of the twelfth form to the fourteenth form, wherein,
some of the intermediate elastic threads are arranged on the skin side with respect to the skin-side sheet portion and on the non-skin side with respect to the upper-side sheet portion, and
some of the intermediate elastic threads are arranged on a non-skin side with respect to the skin-side sheet portion and on a skin side with respect to the non-skin-side sheet portion.
According to the pant-type absorbent article of the seventeenth form, the intermediate portion can better conform to the skin of the wearer due to the elastic threads disposed on the skin side with respect to the skin-side panel portion and due to the elastic threads disposed on the non-skin side with respect to the skin-side panel portion. Thus, the risk of leakage of excrement from the upper side of the absorbent body can be reduced.
< eighteenth form >
The pant-type absorbent article according to any one of the twelfth form to the seventeenth form, wherein,
some of the intermediate elastic threads are arranged on the skin side with respect to the skin-side sheet portion and the upper-side sheet portion and on the non-skin side with respect to the absorbent main body, and
some of the intermediate elastic threads are arranged on a non-skin side with respect to the skin-side sheet portion and on a non-skin side with respect to the non-skin-side sheet portion and the absorbent main body.
According to the pant-type absorbent article of the eighteenth form, since the elastic thread is disposed on the skin side with respect to the skin-side panel portion and since the elastic thread is disposed on the non-skin side with respect to the skin-side panel portion, the intermediate portion can better fit the skin of the wearer. Thus, the risk of leakage of excrement from the upper side of the absorbent body can be reduced.
< nineteenth form >
The pants-type absorbent article according to any one of the twelfth to eighteenth aspects, wherein a value obtained by dividing a magnitude of a force by which the upper side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the upper side portion is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is extended by a unit length in the left-right direction by a length in the up-down direction of the intermediate portion.
According to the pants-type absorbent article of the nineteenth form, the intermediate portion is made to fit better to the skin of the wearer while the upper side portion is brought into soft contact with the skin of the wearer, so that the risk of leakage of excrement from the absorbent body can be reduced, and the upper end portion can also be prevented from leaving a line mark on the skin of the wearer.
< twentieth form >
A pants-type absorbent article according to any one of the twelfth to nineteenth aspects, wherein a value obtained by dividing a magnitude of a force by which the core side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the core side portion is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is extended by a unit length in the left-right direction by a length in the up-down direction of the intermediate portion.
According to the pants-type absorbent article of the twentieth form, the intermediate portion is made to fit the skin of the wearer more closely than the core side portion, so that the risk of leakage of excrement from the upper side of the absorbent main body can be reduced.
< twenty-first form >
The pants-type absorbent article according to any one of the twelfth to twentieth aspects, wherein a value obtained by dividing a magnitude of a force by which the upper side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the upper side portion is smaller than a value obtained by dividing a magnitude of a force by which the core side portion is extended by a unit length in the left-right direction by a length in the up-down direction of the core side portion.
According to the pants-type absorbent article of the twenty-first form, the core side portion is made to fit better to the skin of the wearer while the upper side portion is made to come into soft contact with the skin of the wearer, so that the risk of leakage of excrement from the absorbent core can be reduced, and the upper end portion can also be prevented from leaving a line mark on the skin of the wearer.
< second twelfth form >
The pant-type absorbent article according to any one of the twelfth form to the twenty-first form, wherein,
the upper side sheet is a part formed by folding back the upper end of the non-skin side sheet toward the skin side, and
the lower end of the upper side sheet portion is located below the upper end of the absorbent main body.
According to the pants-type absorbent article of the twenty-second form, the difference in rigidity of the upper end of the absorbent main body can be reduced, so that the risk of bending at the upper end of the absorbent main body as a boundary can be reduced.
< twenty-third form >
A pant-type absorbent article according to any one of the twelfth form to the twelfth form, wherein,
the one waist-body portion has a joint portion by which the skin-side sheet portion and the non-skin-side sheet portion are joined,
the joint portion has a shape extending in the up-down direction, and
a plurality of the engaging portions are intermittently arranged in the left-right direction.
According to the pants-type absorbent article of the twenty-third aspect, by using the joined portion, the rigidity of the waist portion in the vertical direction can be improved, so that the risk of the waist portion curling in the vertical direction due to contraction of the elastic thread can be reduced.
In other embodiments, the invention is not limited to the specific embodiments described
Although the embodiments of the present invention have been described, the above embodiments have been described only to facilitate understanding of the present invention and should not be construed as limiting the present invention. It goes without saying that changes and modifications may be made to the present invention without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.
In the above embodiments, a so-called three-piece diaper in which the abdomen-side waist portion 20 and the back-side waist portion 30 are separated from each other and the three members of the abdomen-side waist portion 20, the back-side waist portion 30 and the absorbent main body 10 are included is exemplified as a pants-type absorbent article. However, the present invention is not limited thereto. For example, the pants-type absorbent article may be a so-called two-piece article including two members, an absorbent main body and an exterior member in which the abdomen-side waistline portion 20 and the back-side waistline portion 30 are integrated with each other, and the abdomen-side waistline portion 20 and the back-side waistline portion 30 are continuously formed as one member via a crotch portion.
In the above-described embodiment, on the one hand, the elastic strands of the abdomen-side waist portion 20 include the upper elastic strands 23u and the core-side elastic strands 23c, and on the other hand, the back-side waist portion 30 includes the elastic strands 33 between the skin side sheet 31 and the non-skin side sheet 32, as in the structure of a conventional disposable diaper. However, the present invention is not limited thereto. The back waist portion 30 may include upper side elastic strands and core side elastic strands, or both the abdomen-side waist portion 20 and the back waist portion 30 may include upper side elastic strands and core side elastic strands.
Description of the reference numerals
1 diaper (pants-type absorbent article), 2 joining region,
10, an absorbent body, 11 an absorbent body,
11A absorbent core, 11B core wrap,
12 a top sheet, 13 a bottom sheet,
14 outer sheets, 15 leg-surrounding elastic members,
20 abdomen side waist part (waist part),
21 a skin side sheet (skin side sheet portion), 22 a non-skin side sheet (non-skin side sheet portion),
a 22u fold-back portion, a 22n non-skin side panel portion, a 22s upper side panel portion,
23 of the elastic thread or threads,
23u skin side elastic threads (upper side elastic threads), 23c non-skin side elastic threads (core side elastic threads),
23t ventral upper elastic threads (upper elastic threads),
23m ventral middle elastic thread (middle elastic thread),
23d ventral core-side elastic threads (core-side elastic threads),
the 24-piece member is a member of a single piece,
30 back side waist part (waist part),
31 a skin side panel, 32 a non-skin side panel,
a 32u fold-back portion, a 32n non-skin side panel portion,
33 of an elastic thread, the elastic thread,
33t backside upper elastic threads, 33m backside middle elastic threads, 33d backside core elastic threads,
34 pieces of the components are arranged on the upper surface of the frame,
AU ventral upper side portion (upper side portion),
an AM ventral-side intermediate portion (intermediate portion),
an AC ventral core side portion (core side portion),
the upper side portion of the back side of the BU,
the middle portion of the back side of the BM,
BC is placed on the back side of the core,
the bonding part of the H10 is provided with a bonding part,
h20 bonding part (joint part),
the bonding part of the H24 is provided with a bonding part,
h34 bonding part

Claims (14)

1. A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction,
the pants-type absorbent article includes: an absorbent body comprising an absorbent core; and a pair of waist parts, wherein,
the waistline portion includes: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads which are capable of stretching in the left-right direction,
at least a ventral waistline portion of the pair of waistline portions includes: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction,
the plurality of elastic threads comprises: a plurality of upper elastic threads intermittently arranged on the upper side portion in the up-down direction; and a plurality of core-side elastic threads intermittently arranged in the up-down direction at the core-side portion,
an average value of pitches between the upper side elastic threads adjacent to each other in the up-down direction in the upper side portion is smaller than an average value of pitches between the core side elastic threads adjacent to each other in the up-down direction in the core side portion,
a value obtained by dividing a magnitude of a force by which the upper portion is elongated by a unit length in the left-right direction by the length of the upper portion in the up-down direction is smaller than a value obtained by dividing a magnitude of a force by which the core portion is elongated by a unit length in the left-right direction by the length of the core portion in the up-down direction.
2. A pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction, and
the pants-type absorbent article includes: an absorbent body comprising an absorbent core; and a pair of waist parts, wherein,
the waistline portion includes: a skin side sheet portion; a non-skin side panel portion; and a plurality of elastic threads which are capable of stretching in the left-right direction,
at least a ventral waistline portion of the pair of waistline portions includes: an upper side portion located above the absorbent main body in the up-down direction; and a core side portion overlapping with the absorbent core in the front-rear direction,
the plurality of elastic threads comprises: a plurality of upper elastic threads intermittently arranged on the upper side portion in the up-down direction; and a plurality of core-side elastic threads intermittently arranged in the up-down direction at the core-side portion,
an average value of pitches between the upper side elastic threads adjacent to each other in the up-down direction in the upper side portion is smaller than an average value of pitches between the core side elastic threads adjacent to each other in the up-down direction in the core side portion,
the average value of the diameters of the plurality of upper side elastic threads is smaller than the average value of the diameters of the plurality of core side elastic threads.
3. A pant-type absorbent article according to claim 1 or 2,
the plurality of upper elastic threads are provided so as to extend continuously from one end portion to the other end portion of the abdomen-side waist portion in the left-right direction.
4. A pant-type absorbent article according to any one of claims 1 to 3,
in the center portion of the abdomen-side waist portion in the left-right direction, a notch portion is not provided at an upper end portion of the abdomen-side waist portion in the up-down direction.
5. A pant-type absorbent article according to any one of claims 1 to 4,
the abdominal-side waistline portion includes an intermediate portion that overlaps the absorbent main body in the front-back direction and is located above the absorbent core in the up-down direction, and
the plurality of elastic strands includes a middle elastic strand disposed at the middle portion.
6. A pant-type absorbent article according to claim 5,
a value obtained by dividing a magnitude of a force by which the upper side portion is elongated by a unit length in the left-right direction by the length in the up-down direction of the upper side portion is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is elongated by a unit length in the left-right direction by the length in the up-down direction of the intermediate portion.
7. A pant-type absorbent article according to claim 5 or 6,
a value obtained by dividing a magnitude of a force by which the core-side portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the core-side portion is smaller than a value obtained by dividing a magnitude of a force by which the intermediate portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the intermediate portion.
8. A pant-type absorbent article according to any one of claims 1 to 7,
the pants-type absorbent article further comprises an upper side panel portion formed by folding back an upper end portion of the non-skin side panel portion toward the skin side, and the upper side panel portion is configured to be folded back toward the skin side
The lower end of the upper side sheet portion is located below the upper end of the absorbent main body.
9. A pant-type absorbent article according to any one of claims 1 to 8,
the upper side portion includes an upper side sheet portion located on the skin side with respect to the skin side sheet portion, and
in the front-to-rear direction,
the upper elastic thread is arranged on the skin side with respect to the skin-side sheet portion and on the non-skin side with respect to the upper sheet portion, and
the core-side elastic thread is disposed on a non-skin side with respect to the skin-side sheet portion and on a skin side with respect to the non-skin-side sheet portion.
10. A pant-type absorbent article according to claim 9,
the upper side portion has an engaging portion by which the skin-side sheet portion and the non-skin-side sheet portion are engaged.
11. A pant-type absorbent article according to any one of claims 1 to 10,
the abdomen-side waist-body portion having a joint portion by which the skin-side sheet portion and the non-skin-side sheet portion are joined,
the joint portion has a shape extending in the up-down direction, and
a plurality of the engaging portions are intermittently arranged in the left-right direction.
12. A pant-type absorbent article according to any one of claims 1 to 11,
a back-side waistline portion of the pair of waistline portions includes: a back-side upper portion that overlaps with the upper portion in the up-down direction; and a back-side core-side portion overlapping with the core-side portion in the up-down direction,
the plurality of elastic threads comprises: a plurality of back-side upper elastic threads intermittently arranged on the back-side upper portion in the up-down direction; and a plurality of back-side core-side elastic threads intermittently arranged on the back-side core-side portion in the up-down direction, and
a value obtained by dividing a magnitude of a force by which the back-side upper portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the back-side upper portion is larger than a value obtained by dividing a magnitude of a force by which the back-side core portion is elongated by a unit length in the left-right direction by a length in the up-down direction of the back-side core portion.
13. A pant-type absorbent article according to claim 12,
an average value of pitches between the backside upper elastic threads adjacent to each other in the up-down direction in the backside upper portion is smaller than an average value of pitches between the backside core-side elastic threads adjacent to each other in the up-down direction in the backside core-side portion.
14. A pant-type absorbent article according to any one of claims 1 to 13,
a back-side waistline portion of the pair of waistline portions includes: a back-side upper portion that overlaps with the upper portion in the up-down direction; and a back-side core-side portion overlapping with the core-side portion in the up-down direction,
the plurality of elastic threads comprises: a plurality of back-side upper elastic threads intermittently arranged on the back-side upper portion in the up-down direction; and a plurality of back-side core-side elastic threads intermittently arranged on the back-side core-side portion in the up-down direction,
an average value of pitches between the upper side elastic threads adjacent to each other in the up-down direction in the upper side portion is smaller than or equal to an average value of pitches between the back side upper side elastic threads adjacent to each other in the up-down direction in the back side upper side portion, and
the magnitude of the force that elongates the upper side portion by a unit length in the left-right direction is smaller than or equal to the magnitude of the force that elongates the back-side upper side portion by a unit length in the left-right direction.
CN201980028222.5A 2018-04-24 2019-04-22 Pants-type absorbent article Pending CN112040918A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2018-083371 2018-04-24
JP2018083371 2018-04-24
JP2018083370 2018-04-24
JP2018-083370 2018-04-24
PCT/JP2019/016976 WO2019208480A1 (en) 2018-04-24 2019-04-22 Underpants-type absorbent article

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JP6536934B2 (en) * 2015-02-18 2019-07-03 大王製紙株式会社 Pants type disposable diaper

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EP1880700A1 (en) * 2005-05-09 2008-01-23 Kao Corporation Disposable diaper
JP2007151597A (en) * 2005-11-30 2007-06-21 Daio Paper Corp Absorbent article and manufacturing method of the same
CN102933187A (en) * 2010-05-31 2013-02-13 尤妮佳股份有限公司 Worn article
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