CN116211594A - Absorbent article - Google Patents

Absorbent article Download PDF

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Publication number
CN116211594A
CN116211594A CN202211346510.5A CN202211346510A CN116211594A CN 116211594 A CN116211594 A CN 116211594A CN 202211346510 A CN202211346510 A CN 202211346510A CN 116211594 A CN116211594 A CN 116211594A
Authority
CN
China
Prior art keywords
sheet
wearer
diaper
skin surface
absorber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211346510.5A
Other languages
Chinese (zh)
Inventor
金田悠太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oji Holdings Corp
Original Assignee
Oji Holdings Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2022138798A external-priority patent/JP2023084087A/en
Application filed by Oji Holdings Corp filed Critical Oji Holdings Corp
Publication of CN116211594A publication Critical patent/CN116211594A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/494Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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 outer layers
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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 outer layers
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A61F13/51108Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections the top sheet having corrugations or embossments having one axis relatively longer than the other axis, e.g. forming channels or grooves in a longitudinal direction
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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 outer layers
    • A61F13/514Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56Supporting or fastening means
    • A61F13/58Adhesive tab fastener elements

Abstract

The absorbent article (1) comprises an absorbent body (8) having an absorbent core (8 c) and a water-permeable sheet (7), a top sheet (9), side sheets (10L, 10R) for forming three-dimensional gathers (3 BL, 3 BR), and a 1 st stretchable member. The width of the water permeable sheet (7) covering the absorbent core (8 c) is the same as the width of the wide width part and is constant throughout the length direction. The free ends are present in the vicinity of the standing line when the side panels (10L, 10R) are in an overlapped state in plan view. The three-dimensional gathers (3 BL, 3 BR) stand up as the standing lines toward the skin surface side of the top sheet (9) and extend inward in the width direction than the standing lines.

Description

Absorbent article
Technical Field
The present invention relates to an absorbent article.
Background
An absorbent article provided with three-dimensional gathers extending in the longitudinal direction at the widthwise ends of a top sheet is disclosed (for example, japanese patent application laid-open No. 2018-068464). In the case of such an absorbent article, it is possible to prevent the discharged matter (for example, urine, watery feces, etc.) existing on the top sheet from leaking to the outside.
Disclosure of Invention
Even when the three-dimensional gathers are provided in the absorbent article, there is a possibility that a gap may be generated between the wearer's skin and the three-dimensional gathers due to, for example, the three-dimensional gathers not being in surface contact with the wearer's skin. In such a case, it is considered that the discharged matter leaks from the gap.
In view of such circumstances, an object of the present disclosure is to provide a technique capable of suppressing occurrence of a gap between the skin of the wearer and the three-dimensional gathers when the absorbent article has three-dimensional gathers extending in the longitudinal direction at the ends of the top sheet in the width direction.
In order to solve the above problems, in the present invention, a narrowed portion is provided in the crotch region of the absorbent core, a connection portion for connecting the three-dimensional gather to the top sheet is provided near the outer end portions in the width direction of the wide portions in the front and rear body regions of the absorbent core, and a 1 st stretchable member is provided along the free ends of the three-dimensional gather.
The present invention provides an absorbent article. The absorbent article has a length along a longitudinal direction and a width along a width direction orthogonal to the longitudinal direction. The absorbent article includes: an absorber having an absorbent core capable of absorbing discharged liquid of a wearer and a water-permeable sheet covering the absorbent core; a top sheet having a water permeable region, provided on the skin surface side of the absorber; a water-impermeable side sheet for forming three-dimensional gathers, the side sheet being provided on the skin surface side of the top sheet; and a 1 st stretchable member provided to the side sheet so as to be stretchable in the longitudinal direction. The absorbent core has a shape narrowed in the width direction at the center portion in the longitudinal direction, and has a narrowest portion in a crotch region, wide portions in a front body region and a rear body region, and a widened portion sandwiched by the narrowest portion and the wide portions. The width of the water permeable sheet covering the absorbent core is the same as the width of the wide width portion and is constant throughout the longitudinal direction. The top sheet located further outside in the width direction than the narrowest portion is provided so as to be able to stand up toward the skin surface side at a line extending in the longitudinal direction through the end portion of the narrowest portion in the width direction. The side sheet is provided with a connecting portion which is connected to the top sheet and includes a standing line when the three-dimensional gather is standing up, in the vicinity of the outer end portion in the width direction of the wide portion. The three-dimensional gather has a base end portion provided at the connecting portion, a free end portion provided at an end portion on the skin surface side opposite to the base end portion along the longitudinal direction, and a fold line provided between the base end portion and the free end and extending in the longitudinal direction. The free end is present in the vicinity of the standing line when the side sheet is in an overlapped state in plan view. The 1 st stretchable member is provided along the free end, and the three-dimensional gather is raised as the raised line toward the skin surface side of the top sheet, and extends inward in the width direction than the raised line.
In the absorbent article, the absorbent core may have a bending portion that makes the widthwise end portions easily bent toward the skin surface side with respect to the widthwise central portion.
In the absorbent article, the absorbent core may have a high-rigidity portion at least at the end portions in the longitudinal direction, a center side in the width direction, and a low-rigidity portion at the end portions in the width direction. The bending portion may be formed between the high rigidity portion and the low rigidity portion. The longitudinal end portion of the three-dimensional gather may be laminated on the top sheet in a region overlapping the low rigidity portion.
In the absorbent article, the standing line may be provided inside the widthwise end portion of the absorber.
In the absorbent article, the free end may be provided on the side sheet in an overlapped state so as to be positioned at or near the standing line in a state where the three-dimensional gather is formed.
The absorbent article may further comprise a water impermeable backsheet covering the non-skin side of the absorbent body. The back sheet may be provided so as to overlap the top sheet in a region outside the widened portion in the width direction and in a region inside the widened portion in the longitudinal direction.
In the absorbent article, the free end may be provided inside the widthwise end portion of the absorbent body in a state in which the three-dimensional gather is raised toward the skin surface side.
The absorbent article may further include: an outer sheet disposed on a non-skin surface side of the absorber and forming a trunk-surrounding opening through which the abdomen of the wearer can be inserted and two leg-surrounding openings through which the legs of the wearer can be inserted; a 2 nd stretchable member provided on the abdomen side of the wearer so as to extend along the leg hole opening of one side and traverse the crotch portion, and provided in an extended state on the outer sheet so as to extend along the leg hole opening of the other side; and a 3 rd stretchable member provided in the outer sheet in an extended state on the back side of the wearer. The 3 rd stretchable member may be disposed at a portion where the inner end portion in the width direction overlaps the absorber when viewed in the thickness direction.
The absorbent article may further include an adhesive portion for adhering the absorber and the outer sheet. The adhesive portion may not be provided in a region where the 2 nd stretchable member crosses the absorber.
In the absorbent article, a plurality of the adhesive portions may be provided, each of the plurality of the adhesive portions may extend in the width direction and may be provided so as to be separated from each other in the longitudinal direction, and the adhesive portions may be formed to have the same width as the narrowest portion of the absorbent core.
According to the present invention, when the absorbent article has three-dimensional gathers extending in the longitudinal direction at the widthwise end portions of the top sheet, it is possible to suppress the occurrence of gaps between the skin of the wearer and the three-dimensional gathers.
Drawings
Features, advantages and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which like reference numerals denote like elements, and in which:
fig. 1 is an example of a perspective view of a diaper according to an embodiment.
Fig. 2 is an example of an exploded perspective view of the diaper according to the embodiment.
Fig. 3A is an example of an expanded view of the diaper according to the embodiment.
Fig. 3B is an example of an expanded view of the diaper according to the embodiment.
Fig. 4 is an example of a schematic view of a cross-sectional structure of a diaper according to an embodiment.
Fig. 5 is an example of a schematic plan view of a diaper according to an embodiment.
Fig. 6 is an example of a cross-sectional view including a top sheet and side sheets.
Fig. 7 is an example of an developed view of the diaper according to the embodiment.
Fig. 8 is an example of a schematic view of a cross-sectional structure of a diaper according to an embodiment.
Fig. 9 is an example of a schematic plan view of the diaper of modification 1.
Fig. 10 is an example of a schematic plan view of the diaper of modification 2.
Fig. 11 is an example of an outline of a cross-sectional view of the diaper of modification 3.
Detailed Description
< embodiment >
Hereinafter, a diaper according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are examples, and the present invention is not limited to these embodiments.
Fig. 1 is a perspective view of a pants-type disposable diaper for adults (hereinafter, simply referred to as "diaper") according to an embodiment. In a diaper, a direction connecting a front body disposed to face an abdomen of a wearer and a rear body disposed to face a back is set as a longitudinal direction. The crotch portion disposed in the crotch (disposed opposite the crotch) of the wearer is located between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction). In addition, when the diaper is worn on a wearer, the side facing the skin of the wearer is referred to as the skin surface side, and the opposite side to the skin surface side is referred to as the non-skin surface side. The direction connecting the skin surface side and the non-skin surface side is referred to as the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is referred to as the width direction. In addition, the thickness direction is defined as a planar view. The diaper 1 has a length along the longitudinal direction and a width along the width direction orthogonal to the longitudinal direction, and is worn on the crotch of a wearer. The term "direction" used in the present application means a direction which coincides with the front, rear, left, and right of the wearer in a state where the diaper 1 is worn on the wearer. For example, in the present application, the term "right-left direction" means a direction which coincides with the right-left direction of the wearer when the diaper 1 is worn on the wearer.
In the present embodiment, as an example of the absorbent article, a pants-type disposable diaper having a tubular structure with an opening into which the abdominal region of the wearer enters and a pair of left and right openings through which the left and right lower limbs of the wearer pass is exemplified, but the "absorbent article" in the present application is not limited to pants-type disposable diapers for adults. The term "absorbent article" as used herein includes a pants-type disposable diaper for children. Further, there are various absorbent articles such as a belt-type disposable diaper which is formed into a tubular structure by attaching a belt fixed to a vicinity of one end portion of a sheet-like member which covers the crotch (pudendum) of a wearer from the front body over the back body to a vicinity of the other end portion of the sheet-like member, and which can cover the abdomen circumference and the crotch.
The diaper 1 has: the crotch region 1B is a portion corresponding to a crotch region that covers the pudendum (crotch) of the wearer in a worn state; the front body region 1F is a region corresponding to a front body in the waist of the wearer, and covers the abdomen side of the wearer; and a back region 1R, which is a portion corresponding to the back of the waist of the wearer, for covering the back side of the wearer. Here, the front body region 1F is located on the front side of the crotch region 1B, and the rear body region 1R is located on the rear side of the crotch region 1B. Since the diaper 1 in the present embodiment is a pants-type disposable diaper, the left edge of the front body region 1F and the left edge of the rear body region 1R are joined to each other, and the right edge of the front body region 1F and the right edge of the rear body region 1R are joined to each other. In this way, in the diaper 1, the trunk opening 2T (an example of the "trunk-surrounding opening" in the present application) is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R. In the diaper 1, a left leg opening 2L is formed in a left portion of the crotch region 1B where the above-described joining is not performed, and a right leg opening 2R is formed in a right portion of the crotch region 1B. When the diaper 1 is worn with the left lower limb of the wearer inserted into the left lower limb opening 2L, the right lower limb of the wearer inserted into the right lower limb opening 2R, and the trunk of the wearer entering the trunk opening 2T, the front body region 1F is disposed on the abdomen side of the wearer, the rear body region 1R is disposed on the back side of the wearer, and the left lower limb opening 2L and the right lower limb opening 2R are fixed to the wearer's body in a state surrounding the thigh of the wearer. Since the diaper 1 is fixed to the body of the wearer in this manner, the wearer can freely move while wearing the diaper 1.
In the diaper 1, an absorber capable of absorbing and retaining liquid is mainly disposed around the crotch region 1B. In the diaper 1, in order to suppress formation of a gap which is a flow-out path of liquid between the diaper 1 and the skin of the wearer, a three-dimensional gather 3BL is provided in the left leg opening 2L surrounding the thigh of the left leg of the wearer, a three-dimensional gather 3BR is provided in the right leg opening 2R surrounding the thigh of the right leg of the wearer, and a waist gather 3R is provided in a portion surrounding the abdomen of the wearer. Further, leg gathers 3LL, 3LR are provided at positions surrounding the root portions of the legs of the wearer. The three-dimensional gathers 3BL, 3BR and the waist gather 3R are brought into close contact with the skin of the wearer by the elastic force of the linear rubber. The leg gathers 3LL and 3LR prevent gaps from being formed between the root portions of the legs of the wearer and the diaper 1. Thus, the discharged matter discharged from the pudendum of the wearer hardly leaks out of the diaper 1 and is absorbed by the absorber of the diaper 1.
The diaper 1 can be used in combination with an inner pad not shown. The inner pad is a substantially rectangular absorbent article provided with an absorber, and absorbs discharged liquid. When the diaper 1 and the inner pad are used in combination, the inner pad is placed on the skin surface side of the diaper 1 so as to abut on the discharge hole of the wearer. The discharged liquid is first absorbed by the inner pad, and only the discharged liquid which has not been absorbed by the inner pad reaches the absorber of the diaper 1 and is further absorbed. Thus, even when the amount of discharged liquid is large, leakage of discharged liquid from the diaper 1 can be prevented. In addition, when the amount of discharged liquid is small and the whole absorption by the inner pad is possible, only the inner pad needs to be replaced even if discharged liquid is generated, so that the intervention (nursing) cost can be reduced. In addition, the diaper 1 can be used for a long time.
Fig. 2 is an exploded perspective view of the diaper 1 of the embodiment. The diaper 1 has a cover sheet 4 and an inner cover sheet 5. The cover sheet 4 and the inner cover sheet 5 are substantially hourglass-shaped (gourd-shaped) sheets bonded to form the outer surface of the diaper 1, and have the same shape except for the front body region 1F-side end and the rear body region 1R-side end. In a state of being worn on a wearer, the cover sheet 4 is laminated on the non-skin surface side of the wearer, and the inner cover sheet 5 is laminated on the skin surface side. Linear rubber for forming the waist gathers 3R and the leg gathers 3LL, 3LR is provided between the cover sheet 4 and the inner cover sheet 5. Further, a band-shaped expansion member such as rubber can be appropriately selected instead of the linear rubber.
For example, nonwoven fabrics made of a liquid impermeable thermoplastic resin may be used as the material of the cover sheet 4 and the inner cover sheet 5 in order to suppress leakage of discharged materials. Here, examples of the liquid-impermeable thermoplastic resin include Polyethylene (PE) and polypropylene (PP).
The diaper 1 has a back sheet 6, an absorber 8, and a top sheet 9 laminated in this order on the wearer-side surfaces of the cover sheet 4 and the inner cover sheet 5. The back sheet 6 is a substantially rectangular parallelepiped sheet having a length extending from the front body to the rear body of the wearer through the crotch in the longitudinal direction and a predetermined width in the width direction perpendicular to the longitudinal direction. The absorber 8 and the top sheet 9 are sheet-like members having a substantially rectangular appearance like the back sheet 6, and are sequentially laminated on the back sheet 6 in a state where the longitudinal direction matches the longitudinal direction of the back sheet 6. The back sheet 6 is a sheet made of a liquid impermeable thermoplastic resin for suppressing leakage of discharged material. The top sheet 9 is a sheet-like member disposed on the skin surface side of the wearer so as to cover the water absorbing surface of the absorber 8. The top sheet 9 has liquid permeability in part or all of it. Thus, in a state in which the diaper 1 is worn, liquid discharged from the wearer is immersed in the absorbent body 8 through the topsheet 9 which may come into contact with the skin of the wearer, and is absorbed therein. Examples of the liquid-permeable sheet include woven fabrics, nonwoven fabrics, and porous films. In addition, the top sheet 9 may have hydrophilicity.
The absorber 8 has an absorbent core 8c constituted by a pad and a core wrap sheet 7 wrapping the absorbent core 8 c. The absorbent core 8c is of a substantially hourglass shape with narrowed portions. The absorbent core 8c has a structure in which a particulate absorbent resin (high molecular absorbent material) such as SAP (super absorbent polymer: super Absorbent Polymer) which is a hydrophilic polymer having a crosslinked structure capable of absorbing and retaining water is held in the interstices of a short fiber of cellulose fibers such as pulp fibers, rayon fibers or cotton fibers, or a short fiber obtained by hydrophilizing a synthetic fiber such as polyethylene, polypropylene or polyethylene terephthalate. When the absorbent core 8c absorbs liquid discharged from the wearer, the absorbent resin in the gaps held in the short fibers is swelled, and the liquid is held in the short fibers. In the present embodiment, the absorbent core 8c is substantially hourglass-shaped with a narrowed central portion. The absorbent core 8c can take an appropriate shape according to the purpose. Examples of the shape of the absorbent core 8c include a rectangular shape, an elliptical shape, and various other shapes.
The core wrap sheet 7 is a thin liquid-permeable sheet, and by wrapping the absorbent core 8c with the core wrap sheet 7, the SAP of the absorbent core 8c is less likely to be mixed into other structures. The core wrap sheet 7 in a state of covering the absorbent core 8c has a rectangular parallelepiped shape having an inner width substantially equal to the widths of the front body region 1F and the rear body region 1R of the absorbent core 8 c. That is, in the crotch region 1B in which the absorbent core 8c is narrowed, a space exists between the widthwise end of the absorbent core 8c and the widthwise inner surface of the core wrap sheet 7. In addition, by wrapping the absorbent core 8c with the core wrap sheet 7, the deformation of the absorbent core 8c is suppressed. The core wrap sheet 7 can be formed of pulp fibers, and as an example, a tissue can be used. The core wrap sheet 7 may be 1 sheet, or may be composed of 2 sheets, that is, an upper sheet disposed on the skin surface side of the wearer and a lower sheet disposed on the non-skin surface side of the wearer and wound around the side surface of the absorbent core and the skin surface side. When the core wrap sheet 7 is formed of 2 sheets, the width direction end portion of the upper side sheet may be covered with another sheet (for example, side sheets 10L and 10R, back sheet 6, and top sheet 9 described later). The absorbent body 8 is enclosed by the back sheet 6 and the top sheet 9, and the sample can be prevented from being removed by these sheets, so that the core wrap sheet 7 may not be provided.
The back sheet 6, the absorber 8, and the top sheet 9 all extend from the front body region 1F to the back body region 1R. Thus, when the back sheet 6, the absorber 8, and the top sheet 9 are laminated to cover the wearer's pudendum (crotch), both ends in the longitudinal direction of each of the back sheet 6, the absorber 8, and the top sheet 9 are positioned on the wearer's abdomen side and back side. That is, the pudendum of the wearer is covered with the absorber 8 from the abdomen side to the back side of the wearer. Therefore, regardless of the posture of the wearer in which the wearer is facing the abdomen down and the posture of the wearer in which the wearer is facing the back down, the discharged liquid is discharged outside the body, and the discharged liquid is brought into contact with the absorber 8 via the top sheet 9.
The diaper 1 has elongated belt-shaped side panels 10L and 10R for forming the above-described three-dimensional gathers 3BL and 3 BR. The side sheets 10L and 10R are provided so that the absorbent core 8c overlaps the inner side in the width direction of the long side portion of the top sheet 9. The linear rubbers 10L1 and 10R1 (an example of the "1 st stretchable member" of the present disclosure) are bonded to the side sheets 10L and 10R in a state of being stretched in the longitudinal direction. Thus, when the edge 4F4 of the cover sheet 4, which is the left edge of the front region 1F, and the edge 4R4 of the rear region 1R, which is the left edge, are joined to each other, and the edge 4F5 of the cover sheet 4, which is the right edge of the front region 1F, and the edge 4R5, which is the right edge of the rear region 1R, are joined to each other, the diaper 1 in the finished state shown in fig. 1 is formed, the side sheets 10L and 10R are pulled up in the longitudinal direction by the contraction force of the linear rubbers 10L1 and 10R1, and a pair of fold-back lines 10L2 and 10R2 (an example of a "standing line" in the present application) which are connecting portions with the top sheet 9 are provided along the skin surface side, thereby standing from the top sheet 9. As a result, three-dimensional gathers 3BL, 3BR (described in detail below) are formed that prevent the outflow of liquid from the left and right lower limb openings 2L, 2R (an example of the "leg hole openings" described in the present application). The bonding method of the edges 4F4 and 4R4, and the edges 4F5 and 4R5 is not particularly limited, but may be performed by, for example, heat sealing, high-frequency sealing, ultrasonic sealing, or the like.
The diaper 1 further includes an end sheet 11F that is laminated on the wearer side surface in the front region 1F of the cover sheet 4, and an end sheet 11R that is laminated on the wearer side surface in the back region 1R of the cover sheet 4, with the back sheet 6, the absorber 8, the top sheet 9, and the side sheets 10L, 10R interposed therebetween. The end sheets 11F and 11R are long sheets that overlap the cover sheet 4 and the inner cover sheet 5 at one end side in the longitudinal direction of the top sheet 9. The end pieces 11F, 11R are non-water-impermeable nonwoven fabrics, and reinforce the cover piece 4 and the inner cover piece 5 mainly at the waist abutment portion of the diaper 1. The end pieces 11F and 11R are coated with an adhesive, and bonded to the inner cover piece 5 by the adhesive. The end sheets 11F, 11R are disposed closer to the skin surface than the laminate formed by the back sheet 6, the absorber 8, the top sheet 9, and the side sheets 10L, 10R, and prevent the end portions of the laminate from directly contacting the skin surface to give the wearer a sense of discomfort.
Fig. 3A and 3B are views schematically showing a state in which the diaper 1 according to the embodiment is unfolded and stretched. Fig. 3A schematically shows an internal configuration of the diaper 1 in a developed and elongated state when viewed from the left side. Fig. 3B schematically shows a plan view of the diaper 1 in an unfolded and extended state. In fig. 3B, the side panels 10L and 10R and the end panels 11F and 11R are not shown.
In the following description, the portion of the absorbent core 8c having a shape narrowed in the width direction in the crotch region 1B, which is the widest portion, is referred to as a wide portion 88A, and the portion having the narrowest width is referred to as a narrowest portion 88B. The portion which is sandwiched between the wide portion 88A and the narrowest portion 88B and gradually widens from the crotch region 1B to the front body region 1F is referred to as a widened portion 88C. The portions of the top sheet 9 between the widthwise ends of the narrowest portion 88B and the widened portion 88C and the widthwise ends of the core wrap sheet 7 are side flaps (side flaps) 41L, 41R. Further, by laminating the back sheet 6 on the non-skin surface side of the side flaps 41L, 41R, rigidity is improved. With such a structure, when the linear rubbers 10L1, 10R1 contract, the side wings 41L, 41R are easily raised toward the skin surface side (details will be described later).
The cover sheet 4 is folded back at one end side at the folding-back lines 4FF, 4RF shown in fig. 2. The above-described waist gather 3R is formed by bonding linear rubbers (linear rubbers) 4F1, 4F2 in an elongated state in the front region of the cover sheet 4 and bonding linear rubbers (linear rubbers) 4R1, 4R2 in an elongated state in the rear region of the cover sheet 4. The linear rubbers 4F1, 4F2 are provided in the order of the linear rubbers 4F1, 4F2 from the side of the folding line 4FF along the folding line 4FF that forms the upper edge of the precursor region 1F when folded back. The linear rubbers 4R1 and 4R2 are also provided in the order of the linear rubbers 4R1 and 4R2 from the side of the folded-back line 4RF along the folded-back line 4RF that forms the upper edge of the rear body region 1R when folded back, similarly to the linear rubbers 4F1 and 4F 2.
Thus, the linear rubbers 4F1, 4F2 are provided on the cover sheet 4 in such an orientation that the longitudinal direction, which is the expansion and contraction direction, is the lateral direction of the diaper 1. The linear rubbers 4R1, 4R2 are provided on the cover sheet 4 in such a manner that the longitudinal direction, which is the extension and contraction direction, is the lateral direction of the diaper 1. Thus, when the edge 4F4 and the edge 4R4 are joined to each other and the edge 4F5 and the edge 4R5 are joined to each other, the linear rubbers 4F1, 4F2 and the linear rubbers 4R1, 4R2 form a substantially annular stretchable member surrounding along the trunk opening 2T, and function to shrink the trunk opening 2T in the trunk-surrounding direction. That is, the linear rubbers 4F1 and 4F2 and the linear rubbers 4R1 and 4R2 exert a contraction force to bring the diaper 1 into close contact with the wearer, thereby preventing a gap from being formed between the diaper 1 and the abdominal circumference of the wearer. A part of the plurality of linear rubbers 4F2 and 4R2 on the crotch region 1B side overlaps the absorbent core 8 c.
The linear rubbers 4F1 and 4R1 are provided so as to extend in the left-right direction along portions that are upper edges of the front body region 1F and the rear body region 1R shown in fig. 1. The linear rubbers 4F2 and 4R2 are disposed in parallel with a predetermined interval therebetween. The linear rubbers 4F1 and 4R1 fasten the abdomen of the wearer relatively strongly above the linear rubbers 4F2 and 4R2 in a state where the diaper 1 is worn. The linear rubbers 4F1 and 4R1 serve to prevent the diaper 1 from being brought into close contact with the wearer, thereby preventing the wearing position from being shifted, and preventing discharged materials from leaking from the abdomen and back. The linear rubbers 4F2, 4R2 alleviate the sense of compression to the wearer caused by the contraction force of the linear rubbers 4F1, 4R 1. In addition, the linear rubbers 4F2, 4R2 suppress the displacement of the inner pad when the inner pad is used.
The linear rubber 4F3 (an example of the "2 nd stretchable member" of the present disclosure) and the linear rubber 4R3 (an example of the "3 rd stretchable member" of the present disclosure) are bonded to the cover sheet 4 in an elongated state. The linear rubbers 4F3 and 4R3 are stretchable members provided in the cover sheet 4 in the crotch region 1B side of the linear rubbers 4F2 and 4R 2. The linear rubbers 4F3 and 4R3 are arranged to be bent in the direction of the crotch region 1B, unlike the other linear rubbers bonded without interruption from the left end to the right end of the cover sheet 4, and overlap the absorbent core 8C at the widened portion 88C of the hourglass-shaped absorbent core 8C. With this configuration, the arrangement regions of the linear rubbers 4F3, 4R3 can be made to function as the leg gathers 3LL, 3 LR. The linear rubber 4F3 provided in the front region (abdomen side) crosses the absorber 8 when viewed in the thickness direction. Here, in a region where the linear rubber 4F3 crosses the widthwise central portion of the diaper 1, the cover sheet 4 and the absorber 8 are non-bonded, and more specifically, in this region, the inner cover sheet 5 and the back sheet 6 are non-bonded. Therefore, the absorber 8 is not contracted by contraction of the linear rubber 4F3, and the cover sheet 4 can lift the absorber 8 toward the skin surface side. With this structure, the diaper 1 easily lifts the absorber 8 on the abdominal side toward the wearer, and the free ends of the three-dimensional gathers 3BL, 3BR are brought into contact with appropriate positions of the skin of the wearer on the abdominal side of the wearer.
The linear rubber 4F3 provided in the front region (abdomen side) crosses the absorber 8 when viewed in the thickness direction. Here, in a region where the linear rubber 4F3 crosses the widthwise central portion of the diaper 1, the cover sheet 4 and the absorber 8 are non-bonded, and more specifically, in this region, the inner cover sheet 5 and the back sheet 6 are non-bonded. Therefore, the absorber 8 is not contracted by contraction of the linear rubber 4F3, and the cover sheet 4 can lift the absorber 8 toward the skin surface side. With this structure, the diaper 1 easily lifts the absorber 8 on the abdominal side toward the wearer, and the free ends of the three-dimensional gathers 3BL, 3BR are brought into contact with appropriate positions of the skin of the wearer on the abdominal side of the wearer.
The linear rubber 4R3 overlaps the absorbent core 8C at the widened portion 88C so as to follow the narrowed portion of the cover sheet 4. The linear rubbers 4F3, 4R3 overlap with a part of the absorber 8 and the side flaps 41L, 41R of the top sheet 9 at the widthwise outer sides of the widened portion 88C. The portions of the cover sheet 4 to which the linear rubbers 4F3, 4R3 are attached are folded by the linear rubbers 4F3, 4R3 themselves contracting in the extending direction, and function as leg gathers 3LL, 3LR for bringing the diaper 1 into close contact with the thighs of the wearer.
The cover sheet 4 is folded back at the folding lines 4FF and 4RF to extend to the arrangement regions of the linear rubbers 4F1 and 4R1, and the arrangement regions of the linear rubbers 4F1 and 4R1 are reinforced by the folded back portions. The end pieces 11F, 11R are provided in the arrangement regions of the linear rubbers 4F2, 4R2 where the cover piece 4 folded back at the folding lines 4FF, 4RF does not extend, and reinforce the arrangement regions of the linear rubbers 4F2, 4R 2.
In the present application, the state in which the sheets overlap is not limited to the state in which the sheets overlap each other so as to be in contact with each other over the entire surface, and is a concept including the state in which a part of the sheets overlap each other. For example, a portion of the end piece 11F on one end side in the longitudinal direction of the back piece 6 overlaps with a portion of the cover piece 4 in a contact state. In the diaper 1, the cover sheet 4, the end sheets 11F, 11R, the inner cover sheet 5, and the side sheets 10L, 10R are stacked in addition to the back sheet 6 and the top sheet 9 sandwiching the absorber 8, and therefore, it can be said that a laminate in which these multiple sheets are stacked is provided.
Fig. 4 is a view schematically showing a cross-sectional configuration of a diaper of an embodiment. The absorber 8 includes a core wrap sheet 7 and an absorbent core 8c wrapped by the core wrap sheet 7. The absorbent core 8c extends near the longitudinal end to near the widthwise end of the absorbent body 8.
The crotch region 1B is sandwiched between the legs of the wearer, and therefore applies compressive pressure inward in the width direction. On the other hand, in the front body region 1F and the rear body region 1R, pressure is applied in the thickness direction of the absorbent core 8c by applying the weight of the wearer. By providing the narrowed portion in the crotch region of the absorbent core 8c, the absorbent core 8c in the crotch region is paid up, and thus, the sample is prevented from being drawn inward in the width direction. In the front and rear body regions, the width of the absorbent core is widened to increase the area to which the body weight is applied, thereby preventing the body weight from being deformed in the thickness direction. Therefore, the absorbent core 8c is preferably an hourglass shape.
In this figure, the absorbent core 8c is enclosed by a water permeable core wrap sheet 7. The core wrap sheet 7 is divided into an upper core wrap sheet 7f positioned on the skin side of the wearer when worn and a lower core wrap sheet 7b positioned on the non-skin side of the wearer when worn. The upper core wrap sheet 7f and the lower core wrap sheet 7b are bonded to each other at the skin-face side end portion of the absorbent core 8 c. The upper core wrap sheet 7f is bonded to the skin surface side of the absorbent core 8c by a hot melt adhesive HM. The lower core wrap sheet 7b is bonded to the absorbent core 8c by the hot melt adhesive HM.
The backsheet 6 is a water impermeable film laminated on the non-skin surface side of the absorbent body 8, and prevents the discharged liquid that has permeated the absorbent body 8 from leaking out to the cover sheet 4 side. The back sheet 6 is wider than the absorbent core 8c, and wraps the side surface of the absorbent core 8c so as to reach the skin surface side.
The top sheet 9 is a water permeable sheet that abuts the skin surface of the wearer. When discharged from the wearer, the discharged liquid permeates into the absorbent core 8c through the top sheet 9 and is absorbed. The top sheet 9 is also wider than the absorbent core 8c, and the side surface of the absorbent core 8c is wrapped so as to reach the non-skin surface side. On the skin surface side of the absorber 8, the top sheet 9 is laminated on the skin surface side of the back sheet 6.
The side sheets 10L and 10R are water impermeable nonwoven fabric sheets disposed on both sides in the width direction of the absorber 8, and constitute a pair of side sheets covering the side surfaces in the width direction of the absorber 8. The side sheets 10L and 10R further stand up toward the skin surface side at the skin surface side end portion of the absorbent body 8, and form three-dimensional gathers 3BL and 3BR for preventing lateral leakage of discharged liquid. The side sheets 10L, 10R are laminated on the skin surface side of the top sheet 9 on the skin surface side of the absorber 8.
The back sheet 6 has a folded portion 6A folded back toward the skin surface side at the widthwise end portion of the absorber 8 and extending toward the skin surface side of the absorber 8. The back sheet 6 is folded back toward the skin surface side of the absorber 8 so that the folded back portion 6A covers the widthwise end portion of the absorber 8. A hot-melt adhesive is applied between the folded-back portion 6A and the top sheet 9 so as to extend in the longitudinal direction of the diaper 1. By applying the hot melt adhesive, the folded back portion 6A is bonded to the top sheet 9.
The side sheets 10L, 10R for forming the three-dimensional gathers 3BR, 3BL are disposed outside the center in the width direction of the diaper 1 and on the skin surface side of the top sheet 9. A hot-melt adhesive is applied between the top sheet 9 and the side sheets 10L and 10R so as to extend in the longitudinal direction of the diaper 1. By applying the hot melt adhesive, the top sheet 9 is bonded to the side sheets 10L, 10R. The water impermeable portions 30L, 30R are formed of a heat-fusible adhesive having water impermeability. The water impermeable portions 30L, 30R are formed from the non-skin surface side of the side sheets 10L, 10R to the skin surface side of the folded-back portion 6A of the back sheet 6 via the top sheet 9 when viewed in the thickness direction. The water impermeable portions 30L, 30R prevent the discharged liquid that has passed through the top sheet 9 from leaking from the widthwise ends of the absorbent body 8 along the folded-back portion 6A of the back sheet 6, and prevent the discharged liquid from entering between the side sheets 10L, 10R and the top sheet 9. Thus, the water impermeable portions 30L, 30R suppress leakage of liquid from the widthwise end portions of the diaper 1. The water impermeable portions 30L, 30R are formed from the front body region to the rear body region so as to extend in the longitudinal direction of the diaper 1. Thus, the diaper 1 can suppress lateral leakage from all positions of the widthwise end portions.
The side sheets 10L and 10R cover the widthwise ends of the top sheet 9 and the back sheet 6. Thus, even when the liquid permeates to the widthwise end sides of the water impermeable portions 30L, 30R, the diaper 1 can suppress lateral leakage.
The water impermeable portions 30L, 30R are integrally formed when viewed in the thickness direction. This is because: the hot-melt adhesive is applied from the skin surface side of the top sheet 9, and the water impermeable portions 30L, 30R are formed by the hot-melt adhesive cured between the top sheet 9 and the folded-back portion 6A of the back sheet 6 by penetrating the top sheet 9 and the hot-melt adhesive cured between the top sheet 9 and the side sheets 10L, 10R. In the diaper 1, the discharged liquid does not penetrate the top sheet 9 and reaches the non-skin surface side, and leakage of the liquid from the non-skin surface side can be suppressed.
The three-dimensional gathers 3BL and 3BR are raised toward the skin surface side with the fold-back lines 10L2 and 10R2 formed at the positions overlapping the top sheet 9 as boundaries. The fold-back lines 10L2, 10R2 are formed along the widthwise inner end portions of the water impermeable portions 30L, 30R on the widthwise inner side of the diaper 1 than the water impermeable portions 30L, 30R. In other words, the water impermeable portions 30L, 30R are provided on the outer sides of the fold-back lines 10L2, 10R2 in the width direction of the diaper 1. Since the water impermeable portions 30L, 30R are formed of a hot melt adhesive, the formation areas of these water impermeable portions are hardened as compared with the case where no water impermeable portion is provided. In the diaper 1 of the present embodiment, the side sheets 10L and 10R are disposed on the skin surface side of the water impermeable portions 30L and 30R, so that the water impermeable portions do not directly contact the skin surface of the wearer, and the water impermeable portions can be prevented from contacting the skin surface to cause discomfort to the wearer.
The folded lines 10L2, 10R2, which are inner ends of the water impermeable portions 30L, 30R in the width direction, are located at positions on the inner side of the ends of the absorber 8 in the width direction, for example, at positions of about 3mm to 5 mm. That is, the outer end portion in the width direction of the absorber 8 is located further to the outer side in the width direction of the diaper 1 than the fold-back lines 10L2, 10R 2. As a result, in the diaper 1 of the present embodiment, the outer end portion in the width direction of the absorber 8 does not directly contact the skin surface of the wearer, and the outer end portion in the width direction of the absorber 8 can be prevented from contacting the skin surface to give the wearer a feeling of discomfort. When the side sheets 10L, 10R are raised at the fold-back lines 10L2, 10R2, the water impermeable portions 30L, 30R existing on the outer sides in the width direction than the fold-back lines 10L2, 10R2 can function as high rigidity portions that strengthen the raised lines.
The three-dimensional gathers 3BL, 3BR are folded toward the top sheet 9 as shown in fig. 4, and include base end side pieces 3BL1, 3BR1 extending inward in the width direction of the diaper 1 from the folding lines 10L2, 10R2 with the folding lines 10L2, 10R2 as base ends, free end side pieces 3BL3, 3BR3 bent outward in the width direction of the diaper 1 from the base end side pieces 3BL1, 3BR1 by folding portions 3BL2, 3BR2 (an example of a "folding line" of the present disclosure) extending in the length direction of the diaper 1, and free end portions 3BL4, 3BR4 provided at the tips of the free end side pieces 3BL3, 3BR3 (an example of a "free end of the three-dimensional gather" of the present disclosure). The three-dimensional gathers 3BL, 3BR are abutted along the skin of the wearer from the folded-back portions 3BL2, 3BR2 to the free end portions 3BL4, 3BR 4. The base end side sheets 3BL1, 3BR1 are not bonded to the top sheet 9 except for the fold-back lines 10L2, 10R 2. As shown in fig. 4, the free end portion side panels 3BL3, 3BR3 and the base end portion side panels 3BL1, 3BR1 are not connected and are not bonded except the folded-back portions 3BL2, 3BR2 at the central portions in the longitudinal direction. The free end side panels 3BL3, 3BR3 and the base end side panels 3BL1, 3BR1 may be integrally formed or may be connected as separate pieces.
The free end portions 3BL4, 3BR4 overlap the fold-back lines 10L2, 10R2 in the thickness direction in a state of being folded as the side sheets 10L, 10R before the three-dimensional gathers 3BL, 3BR are formed. The free end portions 3BL4, 3BR4 overlap the fold-back lines 10L2, 10R2 even in a state where the three-dimensional gathers 3BL, 3BR are formed. The free end portions 3BL4, 3BR4 are located, for example, about 1mm to 6mm inward of the widthwise end portions of the absorber 8. The free end portions 3BL4, 3BR4 may be present at a position of about 2mm outside or about 0mm to 2mm inside the folding lines 10L2, 10R2 in the width direction in a state where the side sheets 10L, 10R are folded or in a state where the three-dimensional gathers 3BL, 3BR are formed.
Fig. 5 is a plan view showing the diaper 1 according to the present embodiment, with the backsheet 6, the absorbent core 8c, the topsheet 9, and the side sheets 10L and 10R drawn out. Fig. 6 is a cross-sectional view of a section including the top sheet 9 and the side sheet 10L in the case of cutting along line AA of fig. 5. The 1 st and 2 nd bonded portions of the three-dimensional gathers 3BL and 3BR provided at the longitudinal end portions of the diaper 1 will be described with reference to fig. 6 while referring to fig. 5. Hereinafter, the 1 st bonding portion and the 2 nd bonding portion on the left side of the rear body region 1R will be described, but the 1 st bonding portion and the 2 nd bonding portion on the right side of the rear body region 1R and the left and right sides of the front body region 1F are the same, and therefore the description thereof will be omitted.
The diaper 1 includes, at the longitudinal end portions: a 1 st bonding part 35 for bonding the base end portion side sheet 3BL1 and the top sheet 9; and a 2 nd adhesive portion 36, wherein the 2 nd adhesive portion 36 is formed at a position not overlapping the 1 st adhesive portion 35 when viewed in plan in a state where the free end portion side sheet 3BL3 overlaps the base end portion side sheet 3BL1, and adheres the free end portion side sheet 3BL3 and the base end portion side sheet 3BL 1. The three-dimensional gather 3BL is fixed to the top sheet 9 by the 1 st adhesive portion 35 in the rear body region 1R, which is the longitudinal end portion of the diaper 1, so as to stand up toward the skin surface side in the crotch region 1B. The three-dimensional gather 3BL stands up toward the skin surface side with the fold-back line 10L2 shown in fig. 4 as a boundary in the region where the 1 st adhesive portion 35 is not formed.
The 1 st adhesive portion 35 is formed by applying a hot melt adhesive to the top sheet 9. Accordingly, the 1 st adhesive portion 35 is hardened, but since the 1 st adhesive portion 35 and the 2 nd adhesive portion 36 are formed so as not to overlap each other, the free end side sheet 3BL3 located on the skin surface side of the 1 st adhesive portion 35 can be moved relative to the 1 st adhesive portion 35. The diaper 1 can soften the hardness of the 1 st adhesive part 35 transferred to the wearer by the relative movement of the free end side sheet 3BL 3. Thus, the diaper 1 of the present embodiment can suppress the deterioration of the wearing sensation. Further, although the 2 nd adhesive portion 36 is formed at a position where it contacts the skin of the wearer, the free end side sheet 3BL3 of the adjacent portion of the 2 nd adhesive portion 36 can be relatively moved with respect to the 2 nd adhesive portion 36. Thus, the diaper 1 can soften the skin feel of the 2 nd adhesive portion 36, and can suppress the deterioration of the wearing feeling.
The 2 nd adhesive portion 36 is formed in a linear region of the free end portion side sheet 3BL3 on the width direction end portion side of the diaper 1. By bonding the free end portion 3BL3 and the base end portion side sheet 3BL1 by the 2 nd bonding portion 36 only in the region where the three-dimensional gather 3BL is minimally required to stand up without fixing the free end portion 3BL4, the area of the 2 nd bonding portion 36 directly contacting the skin of the wearer can be reduced.
The 2 nd adhesive portion 36 is formed by heat-welding the free end portion side sheet 3BL3 and the base end portion side sheet 3BL 1. In addition, the thermal welding includes ultrasonic welding. If the adhesive portion is formed by using a hot melt adhesive, the adhesive adheres. Further, if the 2 nd adhesive portion 36 is formed by a hot melt adhesive, the layer formed by the adhesive increases in the portion near the skin, and therefore the wearer feels hard when wearing the diaper 1. The wearing feeling of the diaper 1 is reduced by these factors, but the diaper 1 of the present embodiment can suppress the reduction of the wearing feeling by these factors because the 2 nd adhesive portion 36 is formed without using a hot melt adhesive.
The 2 nd adhesive portion 36 is formed in plural. The plurality of 2 nd adhesive parts 36 are formed so as to be separated from each other and arranged along the longitudinal direction of the diaper 1. Further, the 2 nd adhesive portions 36 are formed at equal intervals in terms of their separation length from each other. By forming the 2 nd adhesive portion 36 in plural separate portions, a non-adhesive region can be formed between the 2 nd adhesive portions 36, and the diaper 1 can reduce the hardness due to the 2 nd adhesive portion 36.
On the other hand, as described above, the 1 st adhesive portion 35 is formed of a hot melt adhesive. Thereby, the free end side sheet 3BL3 can be folded by the folded-back portion 3BL2, and the three-dimensional gather 3BL and the top sheet 9 can be bonded in a state where the base end side sheet 3BL1 and the free end side sheet 3BL3 are laminated. If the 1 st adhesive part 35 is formed by heat welding the top sheet 9 and the base end side sheet 3BL1, the base end side sheet 3BL1 and the free end side sheet 3BL3 are also heated and welded, and therefore the three-dimensional gather 3BL cannot be adhered to the top sheet 9 in a state where the base end side sheet 3BL1 and the free end side sheet 3BL3 are laminated, and the manufacturing process of the diaper 1 increases. The diaper 1 of the present embodiment is formed by using the 1 st adhesive portion 35 with a hot melt adhesive, and thus can prevent an increase in the number of manufacturing steps.
The 1 st adhesive portion 35 is formed in plural. The 1 st adhesive parts 35 are formed so as to be separated from each other and arranged along the longitudinal direction of the diaper 1. The 1 st adhesive portion 35 is formed at equal intervals in terms of the separation length from each other. By forming the 1 st adhesive part 35 in plural separate pieces, a non-adhesive region can be formed between the 1 st adhesive parts 35, the base end portion side sheet 3BL1 and the top sheet 9 can relatively move through the non-adhesive region, and the free end portion side sheet 3BL3 laminated on the 1 st adhesive part 35 can relatively move with respect to the base end portion side sheet 3BL1, so that the 1 st adhesive part 35 can be hardly perceived by the wearer.
The linear rubber 10L1 is disposed along the free end portion 3BL4 on the inner side in the longitudinal direction than the 1 st adhesive portion 35 in the vicinity of the folded-back portion 3BL2 of the free end portion side sheet 3BL3, in the vicinity of the free end portion 3BL4, and in the central portion between the folded-back portion 3BL2 and the free end portion 3BL 4. The vicinity of the folded portion 3BL2 where a part of the linear rubber 10L1 is provided is located on the inner side in the width direction than the 1 st bonded portion 35, and is the outermost vicinity of the region where the base end portion side sheet 3BL1 and the top sheet 9 are non-bonded. As a result, the folded-back portion 3BL2 is pulled inward in the longitudinal direction by the linear rubber 10L1, and the non-bonded base end portion side sheet 3BL1 stands up in the entire area of the non-bonded area between the base end portion side sheet 3BL1 and the top sheet 9 on the inner side in the width direction than the 1 st bonded portion 35. Therefore, in the longitudinal direction of the diaper 1, the folded-back portion 3BL2 side of the base end portion side sheet 3BL1 stands up before the free end portion 3BL4 of the free end portion side sheet 3BL 3. Thus, the folded-back portion 3BL2 is brought into contact with the skin, and then the free end portion 3BL4 on the inner side in the longitudinal direction of the diaper 1 is brought into contact with the skin. Thereby, the entire region from the folded-back portion 3BL2 to the free end portion 3BL4 is shaped along the skin. That is, the entire region of the free end side sheet 3BL3 is along the skin, so that the possibility of the inner space and the outer side in the width direction of the diaper 1 communicating is reduced. The above-described functions of the three-dimensional gathers 3BL and 3BR are easily exhibited. On the other hand, in the case where the three-dimensional gather 3BL is in contact with the skin in a linear shape as a diaper of the comparative example, a portion where a gap is formed between the skin and the three-dimensional gather 3BL may be generated. The linear rubber 10L1 may be further provided at a position other than these positions so as to be contractible in the longitudinal direction.
As shown in fig. 5, the 2 nd adhesive portion 36 is formed further toward the inside (center side) of the 1 st adhesive portion 35 in the longitudinal direction of the diaper 1. Thus, in the width direction, there is a region where the 2 nd bonding portion 36 is provided but the 1 st bonding portion 35 is not provided. According to such a structure, the base end portion side sheet 3BL1 not provided with the 1 st adhesive portion 35 is first erected at the time of wearing the diaper 1. The cross-sectional shape of the three-dimensional gather 3BL formed orthogonal to the longitudinal direction is v-shaped, and the formation and maintenance of this shape are facilitated. Further, since the folded-back portion 3BL2 is brought into contact with the skin of the wearer, and then the free end portion side sheet 3BL3 stands up, the region from the folded-back portion 3BL2 to the free end portion 3BL4 is brought into contact with the skin. This makes it possible to make the three-dimensional gather 3BL in contact with the skin planar, not linear. As a result, the diaper 1 of the present embodiment can be brought into contact with the skin at any position in the region from the folded-back portion 3BL2 to the free end portion 3BL4 by making the contact between the three-dimensional gather 3BL and the skin planar, and therefore, it is possible to suppress the formation of a gap between the skin and the three-dimensional gather 3 BL.
As shown in fig. 5, when the diaper 1 is viewed in plan, the 1 st adhesive portion 35 is formed on the outer side in the width direction than the inner side end in the width direction of the base end portion side sheet 3BL 1. In this way, the diaper 1 can prevent the discharged liquid such as urine flowing through the top sheet 9 from passing through the 1 st adhesive part 35 due to the gap between the top sheet 9 and the base end portion side sheet 3BL1, and the discharged liquid can be introduced to the absorber 8 side of the top sheet 9 through the gap.
Further, the base end portion side sheet 3BL1 and the top sheet 9 are non-bonded regions on the inner side in the width direction than the 1 st bonded portion 35, but the non-bonded regions are laminated with the end sheets 11F, 11R from the skin surface side on the most end in the longitudinal direction (see fig. 2). That is, the non-adhesive region is adhered to the top sheet 9 at the most end in the longitudinal direction. Accordingly, when the linear rubber 10L1 provided in the vicinity of the folded-back portion 3BL2 is contracted, the folded-back portion 3BL2 side of the base end portion side sheet 3BL1 is easily erected in the longitudinal direction of the diaper 1.
In fig. 5, a region in the thickness direction overlapping the high-order portion of the absorbent core 8c in the thickness direction is referred to as a high-order region 24 (an example of a "high-rigidity portion" in the present disclosure), and regions in the thickness direction overlapping the low-order portion of the absorbent core 8c are referred to as low- order regions 22L, 22R (an example of a "low-rigidity portion" in the present disclosure). The high-order area 24 and the low- order areas 22L and 22R extend in the longitudinal direction while maintaining the same width at the wide portion 88A. As shown in fig. 5, the side sheets 10L and 10R are laminated on the top sheet 9 in the low- order regions 22L and 22R at the end portions in the longitudinal direction. The high-order region 24 reinforces the absorbent core 8c in a region where pressure is easily applied when worn, preventing sample loss. The low order regions 22L, 22R are provided at portions that contact the buttocks of the wearer when worn, and easily follow the body surface of the wearer. The high pay-per-view area 24 extends with the same pay-as throughout its extension.
According to the diaper 1 described above, the members such as the absorbent core 8c and the top sheet 9 included in the low- order regions 22L and 22R are easily folded toward the skin surface side from the boundary (an example of the "folded portion" in the present disclosure) with the high-order region 24. Further, since the side sheets 10L, 10R are provided in the low- order regions 22L, 22R, the formed three-dimensional gathers 3BL, 3BR are brought into a state close to the skin surface side at the end portions in the longitudinal direction. Further, as described above, the whole area from the folded-back portion 3BL2 to the free end portion 3BL4 is in a state of being easily brought into contact with the skin, so that the three-dimensional gathers 3BL, 3BR can prevent the leakage of the discharged material on the top sheet 9.
The free end portions 3BL4, 3BR4 are positioned in the vicinity of the fold-back lines 10L2, 10R2 in a state where they are folded as the side sheets 10L, 10R before the three-dimensional gathers 3BL, 3BR are formed. As a result, the linear rubbers 10L1 and 10R1 provided along the free end portions 3BL4 and 3BR4 contract, and the side wings 41L and 41R located on the outer sides in the width direction of the narrowest portion 88B and the widened portion 88C stand up with the end portions in the width direction of the narrowest portion 88B as the starting points. The regions on the longitudinal side of the side flaps 41L, 41R are low- order regions 22L, 22R of the wide width portion 88A. Further, since the low- order regions 22L, 22R are easily folded toward the skin surface side as described above, the side flaps 41L, 41R are also easily raised. Thus, the portion of the top sheet 9 located at the widthwise end in the entire longitudinal direction of the narrowest portion 88B, the widened portion 88C, and the wide portion 88A stands up toward the skin surface side. The height of the three-dimensional gathers 3BL and 3BR thus formed increases over the entire longitudinal direction. This can suppress the occurrence of gaps between the wearer's skin and the three-dimensional gathers 3BL and 3 BR. This improves the leakage preventing effect of the discharged matter present on the top sheet 9.
In addition, according to the diaper 1 described above, the free end portions 3BL4, 3BR4 are located further inward than the end portions in the width direction of the absorbent body 8 in the state where the three-dimensional gathers 3BL, 3BR are formed. Thus, even when the linear rubbers 10L1, 10R1 provided in the vicinity of the free end portions 3BL4, 3BR4 contract, the widthwise end portions of the absorber 8 can be restrained from folding toward the non-skin surface side. This can prevent the three-dimensional gathers 3BL and 3BR from coming into contact with the skin of the wearer from the folded-back portions 3BL2 and 3BR2 to the free end portions 3BL4 and 3BR4 due to the absorbent body 8 being folded toward the non-skin surface side.
Further, according to the diaper 1 described above, there is a possibility that the absorbent cores 8c included in the low-basis- weight regions 22L and 22R may not only bend but also be deformed with respect to the boundary with the high-basis-weight region 24. However, since the side sheets 10L, 10R are laminated on the top sheet 9 included in the low- order regions 22L, 22R, the bending rigidity in the lamination region of the top sheet 9 and the side sheets 10L, 10R is improved. This can suppress the absorbent core 8c contained in the low- pass regions 22L and 22R from being deformed.
In the diaper 1 described above, the linear rubber 4F2 and a part of the linear rubber 4R2 on the crotch region 1B side overlap the absorbent core 8 c. As a result, the linear rubbers 4F2 and 4R2 contract in the width direction, and the absorbent core 8c overlapping the linear rubbers 4F2 and 4R2 on the skin surface side protrudes toward the skin surface side, so that the skin is easily accessed.
In the diaper 1 described above, as shown in fig. 3A and 3B, the portions of the side flaps 41L, 41R provided on the outer sides of the widened portion 88C in the width direction overlap with a portion of the core wrap sheet 7 (see fig. 3B). The linear rubbers 4F3 and 4R3 contract to pull the side flaps 41L and 41R in the contraction direction (the outer side in the width direction). Therefore, the side flaps 41L, 41R can be easily raised even at the line extending in the longitudinal direction through the widthwise end of the narrowest portion 88B. That is, even when the upper absorbent pad 8A has the narrowed portion and the wide portion 88A is present, the side flaps 41L, 41R rise following the rising of the side panels 10L, 10R. Thus, the portions of the top sheet 9 extending in the longitudinal direction from the side flaps 41L, 41R also rise so as to follow the side flaps 41L, 41R. As a result, the height of the three-dimensional gathers 3BL and 3BR increases in the entire longitudinal direction as shown in fig. 4. This improves the leakage preventing effect of the discharged matter present on the top sheet 9.
On the other hand, in the case where the linear rubbers 4F3 and 4R3 and the side flaps 41L and 41R are provided so as not to overlap each other in the thickness direction as diapers of the comparative example, the rigidity of the wide width portion 88A of the upper absorbent pad 8A in the longitudinal direction of the side flaps 41L and 41R is high, and therefore, the side flaps 41L and 41R are likely to be restrained from rising up following the rising up of the side panels 10L and 10R. As a result, the height of the three-dimensional gathers 3BL and 3BR does not increase, and the leakage preventing effect of the discharged matter on the top sheet 9 may be reduced.
As shown in fig. 4, the hot-melt adhesive HM, which adheres the non-skin surface side of the absorbent core 8c and the lower core wrap sheet 7b, is disposed between the three-dimensional gathers 3BL, 3BR so as not to overlap the three-dimensional gathers 3BL, 3BR when the diaper 1 is viewed in the thickness direction. In the region where the hot melt adhesive HM is not provided, the absorbent core 8c is easily folded, and therefore the absorbent core 8c of the lower layer of the three-dimensional gathers 3BL, 3BR is relatively easily folded. When the three-dimensional gathers 3BL, 3BR are raised toward the skin surface side, the absorbent core 8c is also folded from the lower layer of the three-dimensional gathers 3BL, 3BR toward the skin surface side, whereby the entire region of the three-dimensional gathers 3BL, 3BR from the folded-back portion 3BL2 to the free end portion 3BL4 can be maintained along the skin.
Next, the bonding mode between the outer sheet and the absorber 8 in this embodiment will be described. Fig. 7 is a plan view of the diaper 1 in an unfolded and extended state. In fig. 7, the cover sheet 4, the linear rubbers 4F3, 4R3, the inner cover sheet 5, the absorber 8, and the top sheet 9 are drawn out.
In the diaper 1 of the present embodiment, the outer sheet is composed of the cover sheet 4 and the inner cover sheet 5. The linear rubbers 4F3, 4R3 are bonded to the two sheets in an elongated state between the cover sheet 4 and the inner cover sheet 5. The outer sheet is bonded to the back sheet 6 by the 3 rd bonding portion 37. The absorber 8 is bonded to the outer sheet via the backsheet 6 by the 3 rd bonding portion 37. The 3 rd adhesive portion 37 is formed by applying a hot melt adhesive.
The outer sheet is joined at the left and right ends in the width direction, so that a trunk opening 2T through which the abdomen of the wearer can be inserted and left and right lower limb openings 2L and 2R through which the legs of the wearer can be inserted are formed as shown in fig. 1. The linear rubber 4F3 extends along the left lower limb opening 2L, across the crotch, and along the right lower limb opening 2R, and is bonded to the outer sheet in an elongated state. The linear rubber 4R3 is bonded to the outer sheet in an elongated state. The linear rubber 4R3 is disposed at a portion where an inner end portion in the width direction overlaps with the absorbent core 8c of the absorber 8 when viewed in the thickness direction.
The 3 rd adhesive portions 37 extend in the width direction of the diaper 1 and are disposed apart from each other in the longitudinal direction of the diaper 1. The 3 rd adhesive portion 37 is not provided in a region of the absorber 8 where the linear rubber 4F3 crosses the crotch portion, and in this region, the outer sheet and the absorber 8 are not adhered. This region corresponds to the pubic bone of the wearer, and the outer sheet can be lifted up to the skin surface side by the biasing force of the linear rubber 4F3 to bring the absorber 8 along the skin surface of the pubic bone of the wearer.
The linear rubber 4R3 is cut at the widthwise central portion without crossing the absorber 8, and is divided into left and right. The portion of the left and right linear rubbers 4R3 cut is a region corresponding to the anus of the wearer. In the diaper 1, the biasing force of the linear rubber 4R3 is transmitted to the absorber 8 without passing through the outer sheet in the region corresponding to the anus of the wearer, and a space can be formed between the absorber 8 and the anus. The diaper 1 can accommodate feces discharged from a wearer in this space.
Here, the linear rubber 4F3 is non-adhesive to the absorber 8 in a region where the linear rubber 4F3 crosses the absorber 8 in the crotch portion, and therefore does not shrink the absorber 8 in the width direction in this region. If the absorber 8 contracts in the width direction, the three-dimensional gathers 3BL and 3BR are prevented from rising, but in the diaper 1 of the present embodiment, the three-dimensional gathers 3BL and 3BR are not prevented from rising due to contraction of the linear rubber 4F 3. The linear rubber 4R3 can separate the absorber 8 from the skin (anus) of the wearer in the area corresponding to the anus. Thus, the absorber 8 can be separated from the skin of the wearer by the linear rubber 4R3 on the back side, and the three-dimensional gathers 3BL and 3BR can be further raised on the back side. The standing state of the three-dimensional gathers 3BL, 3BR can be maintained so that the linear rubbers 4F3, 4R3 do not hinder the standing of the three-dimensional gathers 3BL, 3 BR. By maintaining this standing state, the three-dimensional gathers 3BL and 3BR stand up, and thus, a state in which no gap is formed between the wearer's skin and the three-dimensional gathers 3BL and 3BR, that is, a state in which the entire region from the folded-back portion 3BL2 to the free end portion 3BL4 is along the skin can be maintained.
In addition, at the narrowest portion 88B of the absorbent core 8c, the 3 rd adhesive portion 37 is formed to have the same width as the narrowest portion 88B. Since the side flaps 41L, 41R are not bonded to the outer sheet (specifically, the inner cover sheet 5), the side flaps 41L, 41R are easily raised toward the skin surface side.
Fig. 8 is a cross-sectional view of the diaper 1 according to the present embodiment, in which the front region or the rear region is cut in the width direction. In fig. 8, a cross-sectional configuration of a wide width portion 88A of the absorbent core 8c is shown. As shown in fig. 8, the widthwise end portions of the absorbent core 8c are wide portions, that is, ears 88L, 88R. In fig. 8, the ears 88L and 88R are shown surrounded by a broken line. The ears 88L, 88R are wider than the narrowest portion 88B of the absorbent core 8c to the outside in the width direction. The ears 88L, 88R are not bonded to the lower core wrap sheet 7b by the hot melt adhesive HM, and have a lower rigidity than the region coated with the hot melt adhesive. Thus, the ears 88L, 88R of the absorbent core 8c are easily bent toward the skin surface side. When viewed in the thickness direction, the three-dimensional gathers 3BL and 3BR are located in the ears 88L and 88R. With this configuration, in the diaper 1, the contraction force of the linear rubbers 10L1, 10R1 of the three-dimensional gathers 3BL, 3BR is applied to the ears 88L, 88R that are easily bent. In the diaper 1, the ear portions 88L, 88R are folded toward the skin surface side to stand up the three-dimensional gathers 3BL, 3BR, whereby the wearer's skin and the three-dimensional gathers 3BL, 3BR can be kept in a state where no gap is formed therebetween, that is, a state where the entire region from the folded-back portion 3BL2 to the free end portion 3BL4 is along the skin.
< modification 1>
Next, a diaper 1 according to modification 1 of the present embodiment will be described. Fig. 9 is a plan view showing the diaper 1 according to the present modification, with the backsheet 6, the absorbent core 8c, the topsheet 9, and the side panels 10L and 10R drawn out. In the diaper 1 of the present modification, the 1 st bonded portion 35 is formed in a curved shape. For example, the 1 st adhesive portion 35 may be formed of a spiral curve. The 1 st adhesive portion 35 may be formed by a wavy curve. These curves may include circular arcs in a perfect circle or an ellipse. Further, a plurality of the 1 st adhesive parts 35 may be formed in a curved shape so as to be separated from each other, and the plurality of 1 st adhesive parts 35 may extend along the longitudinal direction of the diaper 1. In the diaper 1 according to the present modification, the 1 st adhesive portion 35 is formed in a curved shape, so that the area of the 1 st adhesive portion 35 can be reduced, and the skin feel of the 1 st adhesive portion 35 can be further softened.
< modification example 2>
Next, a diaper 1 according to modification 2 of the present embodiment will be described. Fig. 10 is a plan view of the diaper 1 according to the present modification, in which the back sheet 6, the absorbent core 8c, the top sheet 9, and the side sheets 10L and 10R are drawn out. In the diaper 1 of the present modification, the 2 nd adhesive portion 36 is formed in a curved shape. For example, the 2 nd bonding portion 36 may be formed of a spiral curve. The 2 nd adhesive portion 36 may be formed by a wavy curve. These curves may include circular arcs in a perfect circle or an ellipse. Further, a plurality of curved 2 nd adhesive portions 36 may be formed separately from each other, and the plurality of 2 nd adhesive portions 36 may extend along the longitudinal direction of the diaper 1. In the diaper 1 according to the present modification, the area of the 2 nd adhesive portion 36 can be reduced by forming the 2 nd adhesive portion 36 in a curved shape, and the skin feel of the 2 nd adhesive portion 36 can be further softened.
< modification example 3>
Next, a diaper 1 according to modification 3 of the present embodiment will be described. Fig. 11 is a view schematically showing a cross-sectional structure of a diaper according to this modification. Fig. 11 shows a cross section of the front and rear body regions of the diaper 1 of the present modification. The absorber 8 includes a core wrap sheet 7 and an absorbent core 8c composed of a plurality of absorbent pads and wrapped by the core wrap sheet 7. In the modification shown in the present figure, the absorbent core 8c has an upper absorbent pad 8a and a lower absorbent pad 8b. The upper absorbent pad 8a is an absorbent pad that is positioned on the skin surface side of the wearer in a worn state, and is an hourglass shape having a narrowed portion in the crotch region in plan view. The upper absorbent pad 8a extends near the longitudinal end to near the widthwise end of the absorbent body 8. In contrast, the lower absorbent pad 8b is an absorbent pad that is positioned on the non-skin surface side of the wearer in the worn state, and is rectangular in plan view. The lower absorbent pad 8b extends only in the central portion of the absorber 8 at a portion corresponding to the wearer's midline, and its full width is equal to or less than the narrowed portion of the upper absorbent pad 8 a. That is, the lower absorbent pad 8b is laminated on the upper absorbent pad 8a so that the entire lower absorbent pad 8b is hidden by the upper absorbent pad 8a when seen in a plane on the skin surface side.
The crotch region 1B is sandwiched between the legs of the wearer, and therefore applies compressive pressure inward in the width direction. On the other hand, in the front body region 1F and the rear body region 1R, pressure is applied in the thickness direction of the absorbent core 8c by applying the weight of the wearer. By providing the narrowed portion in the crotch region of the absorbent core 8c, the upper layer absorbent pad 8a and the lower layer absorbent pad 8b are laminated, whereby the absorbent core 8c in the crotch region is high-order, and thus, the sample is prevented from being discharged inward in the width direction. In the front and rear body regions, the width of the absorbent core is widened to increase the area to which the body weight is applied, thereby preventing the body weight from being deformed in the thickness direction. Thus, it is preferable to set the absorbent core 8c to an hourglass shape.
The upper layer absorbent pad 8a contains, in addition to cellulose-based short fibers or resin-based short fibers (hereinafter, referred to as short fibers) after hydrophilic treatment, a particulate absorbent resin (SAP particles) such as a hydrophilic superabsorbent polymer having a crosslinked structure capable of absorbing and retaining water. When the discharged liquid is discharged from the wearer and permeates into the absorbent core 8c, the particles of SAP absorb moisture and gradually expand, fixing the discharged liquid and preventing the backflow to the skin surface side. On the other hand, the lower absorbent pad 8b contains SAP particles having a lower basis weight (amount of SAP per unit area) than the upper absorbent pad 8 a. Alternatively, the lower absorbent pad 8b may be formed of only short fibers without particles containing SAP.
In this figure, the absorbent core 8c is enclosed by a water permeable core wrap sheet 7. The core wrap sheet 7 is divided into an upper core wrap sheet 7f positioned on the skin side of the wearer when worn and a lower core wrap sheet 7b positioned on the non-skin side of the wearer when worn. The upper core wrap sheet 7f and the lower core wrap sheet 7b are bonded to each other at the skin-face side end portion of the absorbent core 8 c. The upper core wrap sheet 7f is bonded to the upper absorbent pad 8 a. The lower core wrap sheet 7b is bonded to the lower absorbent pad 8 b. However, the non-skin surface side of the upper absorbent pad 8a and the lower core wrap sheet 7b are not bonded. Thus, in the absorber 8, the flow path 8s is formed between the lower core wrap sheet 7b at a position further outside the widthwise end portion of the lower absorbent pad 8b and where the upper absorbent pad 8a extends.
The lower core wrap sheet 7b and the upper absorbent pad 8a may have a lower adhesive strength than the lower core wrap sheet 7b and the lower absorbent pad 8 b. Specifically, the width of the adhesive that bonds the lower core wrap sheet 7b and the lower absorbent pad 8b may be made wider than the width of the lower absorbent pad 8b so that only the end portion of the adhesive bonds to the non-skin surface side of the upper absorbent pad 8 a. In addition, an adhesive having a low adhesive strength may be used for bonding the lower core wrap sheet 7b and the upper absorbent pad 8a, or the amount of the adhesive applied for this purpose may be small. The adhesive is peeled off to form the flow path 8s when the lower absorbent pad 8b absorbs water and swells or when the discharged liquid flows between the lower core wrap sheet 7b and the upper absorbent pad 8 a. If the flow path 8s is formed even when the diaper 1 does not absorb water and the flow path 8s is not required, the flow path 8s may cause the absorbent core 8c to be deformed. If the flow path 8s is formed only when the absorbent core 8c absorbs water, the flow path 8s can be formed only when necessary. The diaper 1 according to the present modification can diffuse urine into the wide portion 88A shown in fig. 3B by the flow path 8s.
< other embodiments >
Next, other embodiments will be described. In the above embodiment, the underpants type disposable diaper has been described as an example, but the present invention is not limited to this, and the present invention can be applied to an absorbent article such as a belt type disposable diaper or an absorbent pad. In the above embodiment, the 1 st adhesive portion 35 and the 2 nd adhesive portion 36 are formed in a broken line along the longitudinal direction, but the present invention is not limited thereto. For example, the 1 st bonding portion 35 and the 2 nd bonding portion 36 may be continuously formed in a linear shape. Further, both the 1 st bonding portion 35 and the 2 nd bonding portion 36 may be formed in a curved shape.
The end pieces 11F, 11R may not be provided. The absorbent core 8c may be provided with the same amount of basis weight without providing the high basis weight region 24 and the low basis weight regions 22L and 22R. The high-order area 24 and the low- order areas 22L and 22R may be formed to have a larger thickness than the area corresponding to the Gao Mu-order area 24, as in the order of the high-order area 24 and the low- order area 22L and 22R, to thereby increase the rigidity. The linear rubbers 4F2 and 4R2 may not overlap the absorbent core 8 c. The linear rubbers 4F3 and 4R3 may not be provided on the outer side in the width direction of the widened portion 88C and on the inner side in the longitudinal direction of the widened portion 88A. The linear rubber 10L1 may not be provided on the inner side in the width direction of the 1 st bonded portion 35, and may be provided on the outermost portion of the region where the base end portion side sheet 3BL1 and the top sheet 9 are not bonded. The 2 nd adhesive portion 36 may not be formed further inward in the longitudinal direction of the diaper 1 than the 1 st adhesive portion 35. The folded lines 10L2 and 10R2 may be provided at positions overlapping with or outside the widthwise end portions of the absorber 8. The free end portions 3BL4, 3BR4 may be located outside the end portions of the absorbent body 8 in the width direction in a state where the three-dimensional gathers 3BL, 3BR are formed. The back sheet 6 may not overlap the side flaps 41L and 41R.
The embodiments and modifications disclosed above can be combined separately.

Claims (10)

1. An absorbent article (1) having a length in a longitudinal direction and a width in a width direction orthogonal to the longitudinal direction,
the absorbent article (1) is characterized by comprising:
an absorber (8) having an absorbent core (8 c) capable of absorbing discharged liquid of a wearer and a water-permeable sheet (7) covering the absorbent core (8 c);
a top sheet (9) having a water permeable region, which is provided on the skin surface side of the absorber (8);
a water-impermeable side sheet (10L, 10R) for forming three-dimensional gathers (3 BL, 3 BR) provided on the skin surface side of the top sheet (9); a kind of electronic device with high-pressure air-conditioning system
The 1 st stretchable member is provided on the side panels (10L, 10R) so as to be stretchable in the longitudinal direction,
the absorbent core (8 c) has a shape that narrows in the width direction at the center portion in the longitudinal direction, and has a narrowest portion in the crotch region, wide portions in the front and rear body regions, and a widened portion sandwiched by the narrowest portion and the wide portions,
the width of the water permeable sheet (7) covering the absorbent core (8 c) is the same as the width of the wide width part and is constant throughout the length direction,
The top sheet (9) located further outside in the width direction than the narrowest portion is provided so as to be capable of standing up toward the skin surface side at a line extending in the longitudinal direction through the end portion of the narrowest portion in the width direction,
the top sheet (9) is connected to the side sheets (10L, 10R) near the outer end of the wide width part in the width direction, and comprises a connection part of a rising line when the three-dimensional pleats (3 BL, 3 BR) are rising,
the three-dimensional pleats (3 BL, 3 BR) have a base end portion provided at the connecting portion, a free end provided at an end portion on the skin surface side opposite to the base end portion along the longitudinal direction, and a folding line provided between the base end portion and the free end and extending in the longitudinal direction,
the free ends are present in the vicinity of the standing line when the side panels (10L, 10R) are in an overlapped state in plan view,
the 1 st stretchable member is provided along the free end, and the three-dimensional gathers (3 BL, 3 BR) stand up as the standing lines toward the skin surface side of the top sheet (9) and extend inward in the width direction than the standing lines.
2. Absorbent article (1) according to claim 1, characterized in that,
The absorbent core (8 c) has a bending portion that makes the widthwise end portions easier to bend toward the skin surface side with respect to the widthwise central portion.
3. Absorbent article (1) according to claim 2, characterized in that,
the absorbent core (8 c) has a high-rigidity portion at least at the end in the longitudinal direction, a central side in the width direction, a low-rigidity portion at the end side in the width direction,
the bending portion is formed between the high rigidity portion and the low rigidity portion,
the longitudinal ends of the three-dimensional gathers (3 BL, 3 BR) are laminated on the top sheet (9) in the region overlapping the low rigidity portion.
4. Absorbent article (1) according to claim 1 or 2, characterized in that,
the standing line is provided on the inner side of the end portion of the absorber (8) in the width direction.
5. Absorbent article (1) according to claim 1 or 2, characterized in that,
the free ends are provided on the side sheets (10L, 10R) in an overlapped state so as to be positioned at or near the standing line in a state where the three-dimensional gathers (3 BL, 3 BR) are formed.
6. Absorbent article (1) according to claim 1 or 2, characterized in that,
The absorbent article (1) further comprises a non-water-permeable back sheet (6) covering the non-skin surface side of the absorber (8),
the back sheet (6) is provided so as to overlap the top sheet (9) in a region outside the widened portion in the width direction and in a region inside the widened portion in the longitudinal direction.
7. Absorbent article (1) according to claim 1 or 2, characterized in that,
the free ends are provided on the inner side of the widthwise end of the absorbent body (8) in a state in which the three-dimensional gathers (3 BL, 3 BR) stand up toward the skin surface side.
8. Absorbent article (1) according to claim 1 or 2, characterized in that,
the absorbent article (1) further comprises:
an outer sheet which is disposed on the non-skin surface side of the absorber (8) and forms a trunk-surrounding opening through which the abdomen of the wearer can be inserted and two leg-surrounding openings through which the legs of the wearer can be inserted;
a 2 nd stretchable member provided on the abdomen side of the wearer so as to extend along the leg hole opening of one side and traverse the crotch portion, and provided in an extended state on the outer sheet so as to extend along the leg hole opening of the other side; a kind of electronic device with high-pressure air-conditioning system
And a 3 rd stretchable member provided in the outer sheet in an elongated state on the back side of the wearer, wherein the 3 rd stretchable member is disposed at a portion where the inner end portion in the width direction overlaps the absorber (8) when viewed in the thickness direction.
9. The absorbent article (1) according to claim 8, characterized in that,
the absorbent article (1) further comprises an adhesive part for adhering the absorber (8) and the outer sheet,
the adhesive portion is not provided in a region where the 2 nd stretchable member crosses the absorber (8).
10. Absorbent article (1) according to claim 9, characterized in that,
the plurality of adhesive portions are provided, each of the plurality of adhesive portions extends in the width direction and is provided so as to be separated from each other in the longitudinal direction, and the adhesive portions are formed to have the same width as the narrowest portion of the absorbent core (8 c).
CN202211346510.5A 2021-12-06 2022-10-31 Absorbent article Pending CN116211594A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2021198081 2021-12-06
JP2021-198081 2021-12-06
JP2022138798A JP2023084087A (en) 2021-12-06 2022-08-31 absorbent article
JP2022-138798 2022-08-31

Publications (1)

Publication Number Publication Date
CN116211594A true CN116211594A (en) 2023-06-06

Family

ID=86568541

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211346510.5A Pending CN116211594A (en) 2021-12-06 2022-10-31 Absorbent article

Country Status (1)

Country Link
CN (1) CN116211594A (en)

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