CN111526849B - Absorbent article - Google Patents

Absorbent article Download PDF

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Publication number
CN111526849B
CN111526849B CN201880084498.0A CN201880084498A CN111526849B CN 111526849 B CN111526849 B CN 111526849B CN 201880084498 A CN201880084498 A CN 201880084498A CN 111526849 B CN111526849 B CN 111526849B
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CN
China
Prior art keywords
surface sheet
sheet
outer edge
region
absorbent article
Prior art date
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Active
Application number
CN201880084498.0A
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Chinese (zh)
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CN111526849A (en
Inventor
曽我部瑶介
黑田贤一郎
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.)
Unicharm Corp
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Unicharm Corp
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Filing date
Publication date
Priority claimed from JP2017254061A external-priority patent/JP6685992B2/en
Priority claimed from JP2017254055A external-priority patent/JP6623208B2/en
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of CN111526849A publication Critical patent/CN111526849A/en
Application granted granted Critical
Publication of CN111526849B publication Critical patent/CN111526849B/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/5116—Topsheet, i.e. the permeable cover or layer facing the skin being formed of multiple layers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/4704—Sanitary towels, incontinence pads or napkins having preferential bending zones, e.g. fold lines or grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, 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
    • A61F13/51108—Topsheet, 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15861—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding
    • A61F2013/1591—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding via adhesive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A61F2013/51338—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability having improved touch or feeling, e.g. smooth film

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The absorbent article (1) has a topsheet (10) and an absorbent core (20) disposed on the non-skin-facing surface side of the topsheet (10). The top sheet (10) has a 1 st top sheet (11) containing non-heat-fusible fibers and a 2 nd top sheet (12) positioned on the non-skin-facing side of the 1 st top sheet (11). The outer edge (11E) of the 1 st surface sheet (11) in the width direction (W) is disposed on the skin-facing surface side of the 2 nd surface sheet (12). The absorbent article (1) is provided with a joining Region (RX) where the 1 st surface sheet (11) and the 2 nd surface sheet (12) are joined. A free end part (15) which is not jointed with the 2 nd surface sheet (12) is arranged on the outer edge of the 1 st surface sheet (11).

Description

Absorbent article
Technical Field
The present invention relates to an absorbent article such as a sanitary napkin.
Background
Patent document 1 discloses an absorbent article such as a sanitary napkin. The absorbent article of patent document 1 is provided with a plurality of topsheet on the skin-facing surface side of the absorbent core.
The surface sheet has a 1 st surface sheet (surface sheet of patent document 1) and a 2 nd surface sheet (heat-fusible fiber sheet of patent document 1) overlapping with the 1 st surface sheet in the thickness direction. The No. 1 surface sheet is composed of a nonwoven fabric (specifically, a cotton nonwoven fabric) containing non-heat-fusible fibers. The 1 st surface sheet is joined to the 2 nd surface sheet by a plurality of embossments. Thus, the non-heat-fusible fibers are bonded to the 2 nd surface sheet, and therefore, the non-heat-fusible fibers can be made less likely to fall off.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5074913
Disclosure of Invention
Problems to be solved by the invention
In the absorbent article of patent document 1, the outer edge of the 1 st top sheet is joined to the back sheet at a position outside the absorbent core in the width direction (see fig. 2 of patent document 1). The outer edge of the 1 st surface sheet joined to the back surface sheet is high in rigidity, and therefore there are the following problems: when the wearer walks or the like, the legs of the wearer rub against the outer edge of the top sheet 1, and the skin feel of the wearer is deteriorated.
Therefore, an absorbent article that can suppress the non-heat-fusible fibers from falling off and can suppress the deterioration of the feel of the wearer's skin is desired.
An absorbent article according to one aspect includes: a front-back direction; a width direction orthogonal to the front-rear direction; a surface sheet; and an absorbent core disposed on the non-skin-facing surface side of the top sheet, the top sheet having a 1 st surface sheet containing non-heat-fusible fibers and a 2 nd surface sheet positioned on the non-skin-facing surface side of the 1 st surface sheet, wherein the outer edge in the width direction of the 1 st surface sheet is disposed on the skin-facing surface side of the 2 nd surface sheet, the absorbent article is provided with a joining region where the 1 st surface sheet and the 2 nd surface sheet are joined, and a free end portion which is not joined to the 2 nd surface sheet is provided on the outer edge of the 1 st surface sheet.
Drawings
Fig. 1 is a plan view of the absorbent article of embodiment 1, viewed from the skin-facing surface side.
Fig. 2 is a sectional view taken along line a-a shown in fig. 1.
Fig. 3 is an enlarged view of a portion B shown in fig. 2.
Fig. 4 is a plan view showing the bonded region and the sheet compressing portion in the absorbent article of embodiment 1.
Fig. 5 is a plan view of the absorbent article according to embodiment 2, viewed from the skin-facing surface side.
Fig. 6 is a sectional view taken along line a-a shown in fig. 5.
Fig. 7 is an enlarged view of a portion B shown in fig. 6.
Fig. 8 is a plan view showing the bonded region and the sheet compressing portion in the absorbent article of embodiment 2.
Detailed Description
(1) Brief description of the embodiments
At least the following matters will be made clear from the description of the present specification and the drawings.
An absorbent article according to one aspect has: a front-back direction; a width direction orthogonal to the front-rear direction; a surface sheet; and an absorbent core disposed on the non-skin-facing surface side of the top sheet, the top sheet having a 1 st surface sheet containing non-heat-fusible fibers and a 2 nd surface sheet positioned on the non-skin-facing surface side of the 1 st surface sheet, wherein the outer edge in the width direction of the 1 st surface sheet is disposed on the skin-facing surface side of the 2 nd surface sheet, the absorbent article is provided with a joining region where the 1 st surface sheet and the 2 nd surface sheet are joined, and a free end portion which is not joined to the 2 nd surface sheet is provided on the outer edge of the 1 st surface sheet.
According to this aspect, since the non-heat-fusible fibers contained in the 1 st surface sheet are bonded to the 2 nd surface sheet in the bonding region, the non-heat-fusible fibers can be made less likely to fall off. Since the free end portion is provided on the outer edge of the 1 st surface sheet, the rigidity of the outer edge of the 1 st surface sheet is not high, and deterioration in the feel of the wearer can be suppressed.
According to a preferred aspect, the distance in the width direction between the joining region and the outer edge of the 1 st surface sheet is shorter than the fiber length of the non-heat-fusible fibers.
The surface sheet of the absorbent article of japanese patent laid-open No. 10-118118 is folded in the width direction. The folded-back portion of the topsheet is not joined to the sheet positioned on the non-skin-facing surface side of the topsheet, but is configured to be able to stand toward the wearer. The tip of the folded portion is disposed outward in the width direction. The folded-back portion is configured to be able to stand toward the wearer and is disposed between the legs when worn. Therefore, when the wearer walks or the like, the tip of the folded back portion of the topsheet may be rubbed against the legs of the wearer. Since the surface sheet is repeatedly rubbed by the legs, the fibers constituting the surface sheet may be exfoliated. In particular, in a sheet containing non-heat-fusible fibers, as disclosed in japanese patent application laid-open No. 10-118118, since the fibers do not have heat-fusible properties, the fibers tend to be more likely to fall off. Therefore, an absorbent article capable of suppressing the shedding of non-heat-fusible fibers at the outer edge in the width direction of the topsheet is desired.
According to the above-described preferred aspect, the distance in the width direction between the joining region and the outer edge of the 1 st surface sheet is shorter than the fiber length of the non-heat-fusible fibers, and therefore at least a part of the non-heat-fusible fibers is easily joined in the joining region. Therefore, the non-heat-fusible fibers can be held by the joining region, and the non-heat-fusible fibers can be prevented from falling off when the outer edge of the 1 st surface sheet is rubbed.
According to a preferred aspect, a compressed portion is provided in the joining region, the compressed portion compressing the 1 st surface sheet and the 2 nd surface sheet.
The compression part not only bonds the non-skin-facing surface side of the 1 st surface sheet to the skin-facing surface side of the 2 nd surface sheet, but also easily bonds the 1 st surface sheet in a certain range extending in the thickness direction of the 1 st surface sheet. Therefore, in the joining region, the non-heat-fusible fibers are more easily joined to the 2 nd surface sheet.
According to a preferred aspect, the compression portions are arranged at intervals in the front-rear direction or the width direction.
The outer edge of the 1 st surface sheet has lower rigidity than a structure in which the compressed portions are arranged continuously, and the outer edge of the 1 st surface sheet is likely to follow the movement of the leg. Therefore, friction between the outer edge of the 1 st surface sheet and the legs can be suppressed, and the non-heat-fusible fibers of the 1 st surface sheet can be suppressed from falling off.
According to a preferred embodiment, an adhesive for bonding the 1 st surface sheet and the 2 nd surface sheet is provided in the joining region.
In the structure in which the 1 st surface sheet and the 2 nd surface sheet are joined by the adhesive, heat and pressure are not easily applied to the 1 st surface sheet at the time of joining. Therefore, the breakage of the non-heat-fusible fibers due to heat or the like at the time of bonding can be suppressed, and the falling-off of the fibers of the 1 st surface sheet can be further suppressed.
According to a preferred embodiment, the surface sheet 1 contains heat-fusible fibers.
Since the 1 st surface sheet contains heat-fusible fibers, a fused portion can be formed between the fibers by fusing the heat-fusible fibers, and the non-heat-fusible fibers are less likely to fall off.
According to a preferred embodiment, the 2 nd surface sheet contains thermally fusible fibers.
Since the 2 nd surface sheet contains heat-fusible fibers, a fused portion can be formed between the fibers by fusing the heat-fusible fibers, and the non-heat-fusible fibers of the 1 st surface sheet are hooked to the fused portion and are less likely to fall off.
According to a preferred aspect, a side sheet is disposed on the non-skin-facing surface side of the 2 nd top sheet so as to cover an outer edge of the absorbent article, the outer edge of the 2 nd top sheet is located further outward in the width direction than the outer edge of the 1 st top sheet, and the absorbent article has a lateral non-joined region where the outer edge of the 2 nd top sheet and the side sheet are not joined.
The outer edge of the 2 nd surface sheet is located further to the outside in the width direction than the 1 st surface sheet, and stands up with respect to the side sheet in the side non-joined region. Therefore, when sandwiched by the legs of the wearer, the outer edge of the 2 nd surface sheet is likely to contact the legs before the outer edge of the 1 st surface sheet. The non-heat-fusible fibers can be further prevented from falling off due to friction between the outer edge of the 1 st surface sheet and the legs.
According to a preferred embodiment, the 2 nd surface sheet is folded with a fold line along the front-rear direction as a base point, and the fold line is provided at an outer edge of the 2 nd surface sheet.
Since the 2 nd surface sheet is folded, it is easily deformed with the fold as a base point when contacting the leg of the wearer. By deforming the 2 nd surface sheet, the contact with the 1 st surface sheet can be alleviated, and the falling-off of the non-heat-fusible fibers of the 1 st surface sheet can be suppressed.
According to a preferred embodiment, the outer edge of the surface sheet 1 is located further inward in the width direction than the outer edge of the absorbent core.
The outer side edge of the absorbent core tends to contact the leg before the outer side edge of the surface sheet No. 1 when sandwiched by the leg of the wearer. The non-heat-fusible fibers can be further prevented from falling off due to friction between the outer edge of the 1 st surface sheet and the legs.
According to a preferred aspect, the absorbent article is provided with a compressed portion that compresses at least the 1 st surface sheet and the 2 nd surface sheet in the thickness direction.
The free end of the 1 st surface sheet is easily movable in the planar direction, and when the sheet is compressed in the thickness direction when the compressed portion is formed, the free end of the 1 st surface sheet can move toward the compressed portion. Therefore, the force in the stretching direction applied to the 1 st surface sheet at the time of forming the compressed portion can be reduced, and the 1 st surface sheet can be suppressed from being cracked.
According to a preferred embodiment, the compressed part is formed by compressing the 1 st surface sheet, the 2 nd surface sheet and the absorbent core.
In the structure in which the 1 st surface sheet, the 2 nd surface sheet and the absorbent core are compressed, the degree of compression is stronger and the 1 st surface sheet is more likely to be cracked, as compared with the structure in which only the 1 st surface sheet and the 2 nd surface sheet are compressed. It is therefore preferable to suppress the cracking of the 1 st surface sheet by the free end portion.
According to a preferred aspect, the free end portion overlaps with the absorbent core in the thickness direction.
Since the compressed portion is formed in the absorbent core and the free end portion overlaps the absorbent core, the compressed portion and the free end portion can be easily disposed close to each other. By disposing the free end portion for relaxing the force in the stretching direction in the vicinity of the compression portion, the cracking of the 1 st surface sheet can be further suppressed.
According to a preferred aspect, the free end portion includes the outer edge in the width direction of the 1 st surface sheet and extends in the front-rear direction.
By providing the free end portion on the outer edge of the 1 st surface sheet, the area of the free end portion can be easily secured, and the 1 st surface sheet can be further prevented from being broken.
According to a preferable aspect, the compressed portion is recessed from the 1 st surface sheet side toward the 2 nd surface sheet side.
The force of the compression applied by the compression section is applied from the 1 st surface sheet to the 2 nd surface sheet side. Since the free end portion is provided on the side on which the force is applied (skin-facing surface side), the force in the stretching direction can be further relaxed, and the cracking of the top sheet 1 can be further suppressed.
According to a preferred aspect, the 2 nd surface sheet has a higher elongation than the 1 st surface sheet.
Since the 2 nd surface sheet has a higher elongation than the 1 st surface sheet, even when a sheet having a low elongation is used for the 1 st surface sheet and the 1 st surface sheet is joined, the reduction of the elongation of the entire surface sheet can be suppressed, and the breakage of the 1 st surface sheet can be reduced.
According to a preferred embodiment, the adhesive bonding region having the adhesive for bonding the 1 st surface sheet and the 2 nd surface sheet is provided on the inner side of the free end portion, and the plurality of adhesive bonding regions are provided at intervals.
In the bonding areas, the 1 st surface sheet is bonded to the 2 nd surface sheet, and in the areas between the bonding areas, the 1 st surface sheet is not bonded to the 2 nd surface sheet. Therefore, there are a portion (region between the bonded regions) that easily moves when a tensile force is applied and a portion (bonded region) that does not easily move. When a tensile force is applied, the portion that is easy to move moves with the portion that is not easy to move as a base point. By providing a plurality of these regions, the force in the stretching direction can be further relaxed over a wide range of the 1 st surface sheet 11, and the cracking of the 1 st surface sheet can be further suppressed.
According to a preferred aspect, the compression portion has a 1 st compression portion disposed at the free end portion.
When the 1 st compressed part is formed at the free end part, the 1 st compressed part is formed by compressing the region where the 1 st surface sheet and the 2 nd surface sheet are not joined. Since the 1 st surface sheet and the 2 nd surface sheet are not joined at least around the 1 st compressed part, a force acting in the stretching direction of the 1 st surface sheet can be relaxed. Therefore, the 1 st surface sheet can be further suppressed from cracking.
According to a preferred aspect, the 1 st compressed part spans the free end part and an area outside the 1 st surface sheet.
Compared with the structure in which the 1 st compressed part is formed on the 1 st surface sheet over the entire area, the force acting in the stretching direction of the 1 st surface sheet when the 1 st compressed part is formed can be relaxed. Therefore, the 1 st surface sheet can be further suppressed from cracking.
According to a preferred aspect, the pair of compressing portions is arranged at an interval in a plan view, and the interval between the pair of compressing portions is not constant.
In the portion where the interval between the compressed portions is wide, the length of the 1 st surface sheet in this portion is long, and therefore, a force in the stretching direction when the compressed portions are formed is weak. On the other hand, in a portion where the interval between the compressed portions is narrow, the length of the 1 st surface sheet in this portion is short, and therefore a force in the stretching direction when the compressed portions are formed acts strongly. Since the portion where the tensile force acts strongly and the portion where the tensile force acts weakly are mixed, the force is not concentrated and the breakage of the surface sheet 1 can be further suppressed as compared with the case where the force is uniformly applied.
(2) Structure of absorbent article according to embodiment 1
Hereinafter, an absorbent article according to embodiment 1 will be described with reference to the drawings. The absorbent article is preferably an absorbent article such as a sanitary napkin, a panty liner, a breast pad, an adult incontinence pad, a fecal pad or a sweat-absorbing sheet. In particular, the absorbent article is preferably used by being attached to the inside of a wearing article such as underwear of a user.
In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the scale of each dimension and the like may be different from those in reality. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, in some cases, the drawings include portions having different dimensional relationships and ratios from each other.
Fig. 1 is a plan view of an absorbent article 1 according to embodiment 1, as viewed from the skin-facing surface side. Here, the "skin-facing surface side" corresponds to a side facing the skin of the wearer during use. The "non-skin-facing side" corresponds to the side facing the opposite side of the wearer's skin during use. Fig. 2 is a sectional view taken along line a-a shown in fig. 1, and fig. 3 is an enlarged view of portion B shown in fig. 2. Fig. 4 is a plan view showing the bonded region and the sheet compressing portion in the absorbent article of embodiment 1.
The absorbent article 1 has a front-back direction L and a width direction W. The front-back direction L is a direction extending from the front side (ventral side) to the back side (dorsal side) of the wearer, or a direction extending from the back side to the front side of the wearer. The width direction W is a direction orthogonal to the front-rear direction L.
The absorbent article 1 includes a front region R1, a rear region R2, and a central region R3. The central region R3 includes an excretory opening abutment R33 opposite an excretory opening (e.g., vaginal opening) of the wearer. When the absorbent article 1 is worn in underwear, the central region R3 is located in the crotch portion of the underwear. That is, the excretory opening contact portion R33 is a region disposed in the crotch of the wearer, i.e., between the legs of the wearer.
The front region R1 is located more forward than the center region R3. The front end edge of the front side region R1 defines the front end edge of the absorbent article 1. The rear region R2 is located more rearward than the central region R3. The rear end edge of the rear region R2 defines the rear end edge of the absorbent article 1. The length in the front-rear direction L of the rear region R2 is preferably longer than the length in the front-rear direction L of the central region R3.
The central region R3 is preferably provided with a wing portion 3 described later. Further, the hip flap 4 bulging outward in the width direction W is preferably provided in the rear region R2. The leading edge of the wing portion 3 is defined by the root of the wing portion 3, and corresponds to the portion located on the leading side of the two portions that are recessed to the inside in the width direction W to the maximum extent. The front end edge of the flap portion 3 may define the boundary of the central region R3 with the front region R1. The rear end edge of the wing portion 3 is defined by the root of the wing portion 3, and corresponds to a portion located on the rear side of two portions recessed to the inside in the width direction W to the maximum extent. The rear end edge of the flap portion 3 may define the boundary of the central region R3 and the rear region R2.
The absorbent article 1 includes a front sheet 10 facing the skin of the wearer, a back sheet 14 facing the opposite side of the skin of the wearer, and an absorbent core 20 disposed between the front sheet 10 and the back sheet 14. The topsheet 10 is provided on the skin-facing surface side T1 with respect to the absorbent core 20. The back sheet 14 is provided on the non-skin-facing surface side T2 with respect to the absorbent core 20. The absorbent core 20 is disposed between the topsheet 10 and the backsheet 14.
The topsheet 10 is a liquid-permeable sheet that allows liquid such as body fluid to pass through. The topsheet 10 preferably covers the central portion of the absorbent core 20 in the width direction W. The topsheet 10 preferably extends in the front-back direction L from the front region R1 to the back region R2. The top sheet 10 preferably has a 1 st top sheet 11 and a 2 nd top sheet 12 positioned on the non-skin-facing surface side of the 1 st top sheet 11.
The No. 1 surface sheet 11 contains non-heat-fusible fibers. Non-heat-fusible fibers can exemplify cotton fibers. The 1 st surface sheet 11 is formed by interlacing of non-heat-fusible fibers. The fiber length of the cotton fiber is, for example, 10mm to 80 mm. In the case where the fiber length of the cotton fiber is less than 10mm, the fiber length is too short to cause the fibers to be difficult to interlace with each other, and sufficient strength may not be obtained. In the case where the fiber length of the cotton fiber exceeds 80mm, several of such fibers may protrude in the width direction, and bridging of the fibers may occur from the edge of the wearer's thigh to the edge of the other thigh. In this case, the diffusion of the liquid of the water-retaining fiberWith this effect, the liquid excrement attached to the center portion in the width direction W of the absorbent article 1 may spread to both thighs, and may give a wearer a sense of discomfort. The fiber length is preferably 15mm to 60mm, more preferably 20mm to 40 mm. The weight per unit area of the cotton nonwoven fabric was 20g/m2～150g/m2Preferably. Further, the 1 st surface sheet 11 may have a two-layer structure. It is also possible to have heat-fusible fibers under the 1 st surface sheet 11. The strength at break of the 1 st surface sheet 11 is preferably from 30N/25mm to 60N/25mm in the fiber orientation direction, and the strength at break is preferably from 5N/25mm to 10N/25mm when measured under the set condition of a drawing speed of 100mm/min after setting the distance between the ends of the fiber in the fiber orientation direction and the direction perpendicular thereto to 20 mm.
The 2 nd surface sheet 12 contains heat-fusible fibers. The 2 nd surface sheet 12 is formed by fusion of thermal fusion fibers. The surface sheet 10 may further have a side sheet 13. The side sheet 13 preferably extends outward in the width direction of the 1 st surface sheet 11 and the 2 nd surface sheet 12. The side sheet 13 is disposed on the non-skin-facing surface side of the 1 st surface sheet 11 and the 2 nd surface sheet 12, and does not cover the 1 st surface sheet 11 and the 2 nd surface sheet 12.
As shown in fig. 3, the 1 st surface sheet 11 and the 2 nd surface sheet 12 are laminated in the thickness direction T. The 1 st surface sheet 11 and the 2 nd surface sheet 12 are preferably joined in the joining region RX. In the region where the 1 st surface sheet 11 overlaps the 2 nd surface sheet 12, a joining region RX where the 1 st surface sheet 11 is joined to the 2 nd surface sheet 12 and a non-joining region RY where the 1 st surface sheet 11 is not joined to the 2 nd surface sheet 12 are provided. At least a part of the non-joining region RY constitutes a free end portion 15 described later.
The surface sheet 10 may further have a side sheet 13. The side sheet 13 preferably extends outward in the width direction of the 1 st surface sheet 11 and the 2 nd surface sheet 12. The side sheet 13 covers the outer edge of the absorbent article. The side sheet 13 is disposed on the non-skin-facing surface side of the 1 st surface sheet 11 and the 2 nd surface sheet 12, and does not cover the 1 st surface sheet 11 and the 2 nd surface sheet 12.
The back sheet 14 is a liquid-impermeable sheet. The back sheet 14 may be a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene or the like, an air-permeable resin film, a sheet obtained by joining an air-permeable resin film to a nonwoven fabric such as a spun-bonded nonwoven fabric or a spunlace nonwoven fabric, or the like.
The absorbent core 20 is disposed at least in the central region R3 and the rear region R2. In addition, the absorbent core 20 may also extend from the central region R3 to the front side region R1. The absorbent core 20 contains an absorbent material that absorbs liquid. The absorbent core 20 may also be covered by a core cladding. The absorbent material constituting the absorbent core 20 can be formed of, for example, hydrophilic fibers, pulp, and Super Absorbent Polymer (SAP). The core wrap can be made of, for example, nonwoven fabric or tissue paper.
As described above, the absorbent article 1 has the wing portions 3 and the hip flaps 4. The wing portions 3 and the hip flaps 4 project outward in the width direction W from the outer edge of the absorbent core 20 in the central region R3. The wing portions 3 and the hip flaps 4 are preferably configured by stacking a front sheet 10 and a back sheet 14. The wing portions 3 are configured to be foldable toward the back sheet 14. The wing sections 3 are folded back toward the non-skin-facing surface side of the crotch section of the undergarment during use.
The hip flap 4 is provided in the rear region R2 at a position rearward of the wing portion 3. The hip flaps 4 are not folded back during use, but are disposed between the underwear and the hips of the wearer. In the present embodiment, no absorbent material is provided on the hip flaps 4. It is also possible to provide the hip flaps 4 with absorbent material instead.
The outer edge of the 1 st surface sheet 11 is provided with a free end 15 which is not joined to the 2 nd surface sheet. The free end portion 15 is preferably a region where the non-skin-facing surface of the 1 st surface sheet 11 and the skin-facing surface of the 2 nd surface sheet 12 are not joined, and is a region where the adhesive region RA is not provided and the sheet compressing portion 18 is not provided. In the configuration without the sheet compressing portion 18, the free end portion 15 is preferably an area where the adhesion area RA is not provided. The outer edge is a peripheral edge of the member, and includes a front edge and a rear edge in the front-rear direction and an outer edge in the width direction.
In the joining region RX, the non-heat-fusible fibers contained in the 1 st surface sheet 11 are joined to the 2 nd surface sheet 12, and therefore the non-heat-fusible fibers can be made less likely to fall off. Since the free end portion 15 is provided on the outer edge of the 1 st surface sheet 11, the outer edge 11E of the 1 st surface sheet 11 is not so high in rigidity as to suppress deterioration of the feel of the wearer's skin.
Next, a structure for suppressing the non-heat-fusible fibers of the top sheet 10 of the absorbent article 1 configured as described above from falling off will be described. Since the outer edge 11E of the 1 st surface sheet 11 in the width direction is disposed on the skin-facing surface side of the 2 nd surface sheet 12, the outer edge 11E of the 1 st surface sheet 11 may be rubbed against the legs of the wearer when worn. Non-heat-fusible fibers are not fused by heat, and thus tend to have weaker bonds between fibers, as compared with heat-fusible fibers. Therefore, if the 1 st surface sheet 11 containing non-heat-fusible fibers is rubbed against the legs of the wearer, the non-heat-fusible fibers may be detached. The absorbent article 1 is configured to suppress the non-heat-fusible fibers in the top sheet having the non-heat-fusible fibers (the 1 st top sheet 11 in the present embodiment) from falling off.
A joining region RX where the 1 st surface sheet 11 and the 2 nd surface sheet 12 are joined is provided in a region where the 1 st surface sheet 11 and the 2 nd surface sheet 12 overlap. The distance in the width direction W between the joining region RX and the outer edge 11E of the first surface sheet 11 is shorter than the fiber length of the non-heat-fusible fibers. Therefore, at least a part of the non-heat fusion fibers is joined in the joining region RX. The non-heat-fusible fibers can be held by the joining region RX, and the non-heat-fusible fibers can be prevented from falling off when the outer edge 11E of the 1 st surface sheet 11 is rubbed. In addition, the joining region RX preferably extends in the front-rear direction L. The joining region RX is provided over the entire region of the 1 st surface sheet 11 in the front-rear direction, and the non-heat-fusible fibers can be effectively prevented from falling off.
The joining region RX is located inward in the width direction W from the outer edge 11E of the 1 st surface sheet 11. A non-joined region RY extending inward in the width direction W from the outer edge 11E of the 1 st surface sheet 11 is provided. The distance in the width direction W between the joining region RX and the outer edge 11E of the surface sheet 1 11 is the length in the width direction W of the non-joining region RY.
Next, the joining region RX of the present embodiment will be described in detail. Fig. 4 shows the bonding region RA and the sheet compressed portion 18 of the 1 st surface sheet 11 and the 2 nd surface sheet 12. In practice, the adhesive region RA overlaps the sheet compressing portion 18 in the thickness direction T, but is illustrated as being adjacent to each other in the front-rear direction for convenience of description. The joining region RX is a region where the 1 st surface sheet 11 and the 2 nd surface sheet 12 are joined, and specifically includes a region where the sheet compressed portion 18 and the bonding region RA overlap in the thickness direction T, a region where only the sheet compressed portion 18 is provided, and a region where only the bonding region RA is provided. The non-joining region RY is a region where the sheet compressed portion 18 is not provided and the adhesion region RA is not provided. In another embodiment, the joining region RX may be formed only by a region provided with the compressed portion, or may be formed only by a region provided with the bonding region.
In the joining region RX, a sheet compression portion 18 is preferably provided, which is formed by compressing (pressure-bonding) the 1 st surface sheet 11 and the 2 nd surface sheet 12. The sheet compressing portion 18 not only joins the non-skin-facing surface of the 1 st surface sheet 11 to the skin-facing surface of the 2 nd surface sheet 12, but also facilitates joining of the 1 st surface sheet 11 to the 2 nd surface sheet 12 within a certain range extending in the thickness direction of the 1 st surface sheet 11. Therefore, the non-heat-fusible fibers are bonded to the 2 nd surface sheet 12 in the bonding region RX, and the non-heat-fusible fibers can be further prevented from falling off.
A plurality of sheet compressing portions 18 are preferably arranged at intervals in the front-rear direction L or the width direction W. The sheet compressing portions 18 of the present embodiment extend in the front-rear direction L and are arranged at intervals in the width direction W. The outer edge 11E of the 1 st surface sheet 11 has lower rigidity than the structure in which the sheet compressing portions 18 are arranged continuously, so that the outer edge 11E of the 1 st surface sheet 11 is made to easily follow the leg movements. Therefore, friction between the outer edge 11E of the 1 st surface sheet 11 and the legs can be suppressed, and the non-heat-fusible fibers of the 1 st surface sheet 11 can be suppressed from falling off.
The bonding region RA is preferably provided in the bonding region RX. The adhesive region RA has an adhesive for bonding the 1 st surface sheet 11 and the 2 nd surface sheet 12. The sheet compressing portions 18 of the present embodiment extend in the front-rear direction L and are arranged at intervals in the width direction W. In the structure in which the 1 st surface sheet 11 and the 2 nd surface sheet 12 are joined with an adhesive, heat and pressure are not easily applied to the 1 st surface sheet 11 at the time of joining. Therefore, breakage of the non-heat-fusible fibers due to heat or the like at the time of bonding can be suppressed, and falling-off of the fibers of the 1 st surface sheet 11 can be further suppressed. In addition, non-heat-fusible fibers may be difficult to fuse by compression processing, resulting in low bonding strength. The desired bonding strength is easily obtained by using the adhesive.
In the joining region RX, both the bonding region RA and the sheet compressing portion 18 are preferably provided. The bonding strength between the 1 st surface sheet 11 and the 2 nd surface sheet can be secured by the bonding region RA, and the 1 st surface sheet 11 and the 2 nd surface sheet can be bonded to each other in a certain range in the thickness direction by the sheet compressing portion 18, whereby the non-heat-fusible fibers can be further prevented from dropping off. In addition, in the joining region RX, the bonding region RA and the sheet compressing portion 18 are preferably provided at different pitches. Specifically, it is preferable that the width-directional pitch of the bonding region RA is shorter than the width-directional pitch of the sheet compressing portion 18 and is half the width-directional pitch of the sheet compressing portion 18. With this structure, a region having a strong adhesive strength where both are superimposed and a region having a low adhesive strength where only one of both is disposed are provided. The flexibility of the surface sheet can be ensured in the region with low adhesive strength, and the bonding state of the non-heat-fusible fibers can be maintained in the region with high adhesive strength.
Further, the 1 st surface sheet preferably contains non-heat-fusible fibers and contains heat-fusible fibers. Since the 1 st surface sheet contains heat-fusible fibers, a fused portion can be formed between the fibers by fusing the heat-fusible fibers, and the non-heat-fusible fibers are less likely to fall off. Therefore, the shedding of the thermally fused fibers can be further prevented.
The No. 2 surface sheet 12 preferably contains heat-fusible fibers. Since the 2 nd surface sheet 12 contains heat-fusible fibers, a fused portion can be formed between the fibers by fusing the heat-fusible fibers, and the non-heat-fusible fibers of the 1 st surface sheet 11 are hooked to the fused portion and are not easily detached. Therefore, the non-heat-fusible fibers can be further prevented from falling off.
As shown in fig. 2, a lateral non-joined region RZ in which the outer edge 12E of the 2 nd surface sheet 12 and the side sheet 13 are not joined is preferably provided. The outer edge 12E of the 2 nd surface sheet 12 is located on the outer side in the width direction than the 1 st surface sheet 11, and stands up with respect to the side sheet 13 in the side non-joined region RZ. Therefore, when sandwiched by the legs of the wearer, the outer side edge 12E of the 2 nd surface sheet 12 is likely to contact the legs earlier than the outer side edge 11E of the 1 st surface sheet 11. The non-heat-fusible fibers can be further prevented from falling off due to friction between the outer edge 11E of the first surface sheet 11 and the legs.
The 2 nd surface sheet 12 preferably has a fold FL extending in the front-rear direction L of the 2 nd surface sheet 12 formed at the outer edge 12E thereof. Since the 2 nd surface sheet 12 is folded, it is easily deformed from the fold FL as a base point when contacting the leg of the wearer. For example, in a structure in which the folded 2 nd surface sheets are not joined to each other, the folded 2 nd surface sheets are deformed so as to be apart from each other in the thickness direction and are deformed inward in the width direction. By deforming the 2 nd surface sheet 12, the contact with the 1 st surface sheet 11 can be alleviated, and the falling-off of the non-heat-fusible fibers of the 1 st surface sheet 11 can be suppressed.
The outer edge 11E of the first surface sheet 11 is preferably positioned inward in the width direction W from the outer edge 20E of the absorbent core 20. The outer side edge 20E of the absorbent core 20 tends to contact the leg before the outer side edge 11E of the surface sheet 11 of fig. 1 when sandwiched by the leg of the wearer. The non-heat-fusible fibers can be further prevented from falling off due to friction between the outer edge 11E of the first surface sheet 11 and the legs.
(3) Structure of absorbent article according to embodiment 2
Next, the absorbent article 1 according to embodiment 2 will be described with reference to fig. 5 to 8. Descriptions of the same contents as those of embodiment 1 are omitted.
Fig. 5 is a plan view of the absorbent article 1 according to embodiment 2, viewed from the skin-facing surface side. Fig. 6 is a sectional view taken along line a-a shown in fig. 5, and fig. 7 is an enlarged view of portion B shown in fig. 6. Fig. 8 is a plan view showing the bonded region and the sheet compressing portion in the absorbent article of embodiment 2.
As shown in fig. 6, the 1 st surface sheet 11 may be formed to have convex wrinkles on the skin-facing surface side. By forming the wrinkle portion, the elongation in the width direction of the 1 st surface sheet having a low elongation can be increased by the amount of the convex shape, and therefore, the breakage of the 1 st surface sheet can be reduced.
The 1 st surface sheet 11 and the 2 nd surface sheet 12 are preferably formed with compressed parts 60. The compressed part 60 is formed by compressing at least the 1 st surface sheet 11 and the 2 nd surface sheet 12 in the thickness direction. The compressed portion 60 may be formed by compressing the 1 st surface sheet 11, the 2 nd surface sheet 12, and the absorbent core 20 in the thickness direction. The compressed part 60 of the present embodiment is formed by compressing the 1 st surface sheet 11, the 2 nd surface sheet 12, and the absorbent core 20 in the thickness direction. The absorbent article 1 may further include a sheet compressing portion 18 formed by pressure-bonding the 1 st surface sheet 11 and the 2 nd surface sheet 12, independently of the compressing portion 60.
Next, a structure for suppressing the breakage of the top sheet of the absorbent article 1 configured as described above will be described. The absorbent article 1 is configured to suppress breakage of the top sheet having non-heat-fusible fibers (the 1 st top sheet 11 in the present embodiment).
In forming the compressed portion 60, a force that compresses in the thickness direction and stretches in the planar direction acts on the 1 st surface sheet 11 and the 2 nd surface sheet 12. In this case, in the structure in which the 1 st surface sheet 11 is joined to the 2 nd surface sheet 12 as a whole, the 1 st surface sheet 11 has no freedom of movement in the planar direction and may be cracked by a force that stretches in the planar direction. The free end 15 of the 1 st surface sheet 11 is easily movable in the planar direction, and can move toward the compressed portion 60 when compressed in the thickness direction when the compressed portion 60 is formed. Therefore, the force in the stretching direction applied to the 1 st surface sheet 11 when the compressed part 60 is formed can be reduced, and the 1 st surface sheet 11 having non-heat-fusible fibers such as cotton fibers can be suppressed from breaking.
In particular, in the structure having the compressed portion 60 in which the 1 st surface sheet 11, the 2 nd surface sheet 12 and the absorbent core 20 are compressed as in the present embodiment, the degree of compression is stronger and the 1 st surface sheet 11 is more likely to be cracked than in the structure in which only the 1 st surface sheet 11 and the 2 nd surface sheet 12 are compressed. Therefore, it is preferable to suppress the cracking of the 1 st surface sheet 11 with the free end portion 15.
Next, the free end portion 15 will be described in detail. Fig. 8 shows the bonding region RA of the 1 st surface sheet 11 and the 2 nd surface sheet 12 and the sheet compressed portion 18. In practice, the adhesive region RA overlaps the sheet compressing portion 18 in the thickness direction, but is shown adjacent to each other in the front-rear direction for convenience of description. The adhesive region RA is a region of the 1 st surface sheet 11 and the 2 nd surface sheet 12 to which the adhesive is applied. The adhesive region RA may extend in the front-rear direction L and be provided in plurality at intervals in the width direction. The length of the bonding regions RA in the width direction is preferably longer than the interval of the bonding regions RA in the width direction. In another embodiment, the bonding region RA may extend in the width direction W and be provided in plurality at intervals in the front-rear direction L.
The sheet compressing portion 18 may extend in the front-rear direction L, and a plurality thereof may be provided at intervals in the width direction W. The length of the sheet compressing portion 18 in the width direction is preferably shorter than the interval of the sheet compressing portion 18 in the width direction. In another embodiment, the bonding region RA may extend in the width direction W and be provided in plurality at intervals in the front-rear direction L.
It is preferable to provide a region where the sheet compressing portion 18 overlaps the bonding region RA in the thickness direction and a region where it does not overlap in the thickness direction. The region where the sheet compressed portion 18 and the bonded region RA do not overlap in the thickness direction constitutes a non-joined region RY. A region where the sheet compressing portion 18 and the bonding region RA overlap in the thickness direction, a region where only the sheet compressing portion 18 is provided, and a region where only the bonding region RA is provided constitute a joining region RX.
The adhesive region RA may be located inward of the outer edge of the 1 st surface sheet 11. That is, the bonding region RA may be located inward in the width direction from the outer edge 11E in the width direction of the 1 st surface sheet 11, or may be located inward in the front-rear direction from the outer edge 11F in the front-rear direction L of the 1 st surface sheet 11. Further, the bonding region RA located on the outermost side in the width direction is preferably located on the outer side in the width direction than the sheet compressing portion 18 located on the outermost side in the width direction. In such a configuration, the free end portion 15 is a region between the outer edge 11E of the 1 st surface sheet 11 and the bonding region RA located on the outermost side in the width direction. Further, the bonding region RA located on the outermost side in the front-rear direction is preferably located on the outer side in the width direction than the sheet compressing portion 18 located on the outermost side in the front-rear direction. In such a configuration, the free end portion 15 is a region between the outer edge 11F of the 1 st surface sheet 11 and the bonding region RA located on the outermost side in the front-rear direction.
The free end portion 15 includes the outer edge 11E in the width direction of the 1 st surface sheet 11 and preferably extends in the front-rear direction L. In general, the length of the absorbent article 1 in the front-rear direction L is longer than the length in the width direction W. Therefore, by providing the free end portion 15 at the outer edge 11E of the 1 st surface sheet 11, the area of the free end portion 15 can be easily secured, and the cracking of the 1 st surface sheet 11 can be further suppressed.
The free end portion 15 preferably overlaps the absorbent core 20 in the thickness direction T. Since the compressed portion 60 is formed in the absorbent core 20 and the free end portion 15 overlaps the absorbent core 20, the compressed portion 60 and the free end portion 15 can be easily arranged close to each other. By disposing the free end portion 15 for relaxing the force in the stretching direction in the vicinity of the compression portion 60, the cracking of the 1 st surface sheet 11 can be further suppressed.
The bonding regions RA are preferably provided in plural at intervals. The 1 st surface sheet 11 and the 2 nd surface sheet 12 are joined in the bonding regions RA, and the 1 st surface sheet 11 and the 2 nd surface sheet 12 are not joined in the regions between the bonding regions RA. Therefore, there are a portion (region between the bonded regions) that easily moves when a tensile force is applied and a portion (bonded region) that does not easily move. When a tensile force is applied, the portion that is easy to move moves with the portion that is not easy to move as a base point. By providing a plurality of these regions, the force in the stretching direction can be further relaxed over a wide range of the 1 st surface sheet, and the cracking of the 1 st surface sheet 11 can be further suppressed.
The compressed part 60 may be located inward of the outer edge of the 1 st surface sheet 11. That is, the compressed portion 60 may be located inward in the width direction from the outer edge in the width direction of the 1 st surface sheet 11, or may be located inward in the front-rear direction from the outer edge in the front-rear direction L of the 1 st surface sheet 11. The compression part 60 preferably has a 1 st compression part 61 and a 2 nd compression part 62.
The 1 st compression part 61 is preferably disposed at the free end portion 15. When the 1 st compressed part 61 is formed at the free end, the 1 st compressed part 61 is formed by compressing the region where the 1 st surface sheet 11 and the 2 nd surface sheet 12 are not joined. Since the 1 st surface sheet 11 and the 2 nd surface sheet 12 are not joined at least around the 1 st compressed part 61, the force acting in the stretching direction of the 1 st surface sheet 11 can be relaxed. Therefore, the 1 st surface sheet can be further suppressed from cracking. Further, the 2 nd compressed part 62 is preferably provided in the joining region RX where the 1 st surface sheet and the 2 nd surface sheet are joined.
The 1 st compressed part 61 preferably spans the free end 15 and the region outside the 1 st surface sheet 11. At least the side sheet 13 is preferably disposed outside the 1 st top sheet 11. Compared with the structure in which the 1 st compressed part 61 is formed on the 1 st surface sheet over the entire area, the force acting in the stretching direction of the 1 st surface sheet when the 1 st compressed part 61 is formed can be relaxed. Therefore, the 1 st surface sheet can be further suppressed from cracking.
The compressed part 60 is preferably recessed from the 1 st surface sheet 11 side toward the 2 nd surface sheet 12 side. The force of compression applied by the compression portion 60 is applied from the 1 st surface sheet 11 side to the 2 nd surface sheet 12 side. Since the free end portion 15 is provided on the sheet on the side where the force is applied (skin-facing surface side), the force in the stretching direction can be further relaxed, and the cracking of the top sheet 1 can be further suppressed.
The pair of the compression portions 60 is preferably arranged at an interval in a plan view. It is preferable that the interval between the pair of compressing portions 60 is not constant. That is, as shown in fig. 5, it is preferable to have the 1 st region R11 in which the interval between the pair of compressing sections 60 is narrow and the 2 nd region R12 in which the interval between the pair of compressing sections 60 is wider than the interval in the 1 st region R11. In the portion where the distance between the compressed parts 60 is wide, the length of the 1 st surface sheet in this portion is long, and therefore, a force in the stretching direction when the compressed parts 60 are formed is weak. On the other hand, in the portion where the interval between the compressed portions 60 is narrow, the length of the 1 st surface sheet 11 is short in this portion, and therefore a force in the stretching direction when the compressed portions 60 are formed acts strongly. Since the portion where the tensile force acts strongly and the portion where the tensile force acts weakly are mixed, the force is not concentrated and the breakage of the surface sheet 1 can be further suppressed as compared with the case where the force is uniformly applied.
The 2 nd surface sheet 12 preferably has a higher elongation than the 1 st surface sheet 11. Since the 2 nd surface sheet 12 has a higher elongation than the 1 st surface sheet 11, even when a sheet having a relatively low elongation is used for the 1 st surface sheet 11 and the 1 st surface sheet is joined, the reduction in the elongation of the entire surface sheet can be suppressed, and the breakage of the 1 st surface sheet can be reduced.
The elongation can be measured using a tensile tester (universal tester manufactured by shimadzu corporation). Specifically, test pieces obtained by cutting the 1 st surface sheet and the 2 nd surface sheet into 25mm × 40mm were cut, and the bonded portions were separated by keeping the bonded portions at a low temperature so that the materials did not stretch. The distance between the measuring ends of the tensile tester was set to 20mm, and then the elongation at break was determined by measuring under the set conditions of a tensile speed of 100 mm/min. The measurement was performed 3 times, and the average value thereof was taken as the elongation of each sheet.
The present invention has been described in detail with reference to the above embodiments, but it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.
Industrial applicability
An absorbent article can be provided that can suppress the falling off of non-heat-fusible fibers and that can suppress the deterioration of the feel of the skin of the wearer.
Description of the reference numerals
1. An absorbent article; 11. 1 st surface sheet (surface sheet); 11E, outer edge; 12. 2 nd surface sheet (surface sheet); 12E, outer edge; 13. side sheet (surface sheet); 18. a compression section; 20. an absorbent core; 20E, outer edge; r1, front side region; r2, posterior region; r3, central region; RA, adhesive area; RX, bonding area; RY, a non-engagement region; RZ, lateral non-joined area.

Claims (9)

1. An absorbent article having:
a front-back direction;
a width direction orthogonal to the front-rear direction;
a surface sheet; and
an absorbent core disposed on the non-skin-facing surface side of the topsheet,
the surface sheet has a 1 st surface sheet containing non-heat-fusible fibers and a 2 nd surface sheet located on the non-skin-facing side of the 1 st surface sheet, wherein,
the outer edge in the width direction of the 1 st surface sheet is disposed on the skin-facing surface side of the 2 nd surface sheet,
the absorbent article is provided with a joining region where the 1 st surface sheet is joined to the 2 nd surface sheet,
a free end part which is not jointed with the 2 nd surface sheet is arranged at the outer edge of the 1 st surface sheet,
the distance in the width direction between the joining region and the outer edge of the surface sheet 1 is shorter than the fiber length of the non-heat-fusible fiber,
the outer edge of the 1 st surface sheet is a peripheral edge of the 1 st surface sheet, and includes the front and rear edges in the front-rear direction and the outer edge in the width direction.
2. The absorbent article of claim 1,
the joining region is provided with a compressed portion formed by compressing the 1 st surface sheet and the 2 nd surface sheet.
3. The absorbent article of claim 2, wherein,
the compression portions are arranged at intervals in the front-rear direction or the width direction.
4. The absorbent article according to any one of claims 1 to 3, wherein,
an adhesive for bonding the 1 st surface sheet and the 2 nd surface sheet is provided in the joining region.
5. The absorbent article according to any one of claims 1 to 3, wherein,
the No. 1 surface sheet contains heat-fusible fibers.
6. The absorbent article according to any one of claims 1 to 3, wherein,
the No. 2 surface sheet contains heat-fusible fibers.
7. The absorbent article according to any one of claims 1 to 3, wherein,
a side sheet covering the outer edge of the absorbent article in the width direction is disposed on the non-skin-facing surface side of the 2 nd top sheet,
the outer edge of the 2 nd surface sheet in the width direction is positioned further outward in the width direction than the outer edge of the 1 st surface sheet,
the absorbent article has a lateral non-joined region where the outer edge of the 2 nd surface sheet and the side sheet are not joined.
8. The absorbent article of claim 7,
the 2 nd surface sheet is folded up with a fold line along the front-rear direction as a base point,
the fold is provided at the outer edge of the 2 nd surface sheet.
9. The absorbent article according to any one of claims 1 to 3, wherein,
the outer edge of the surface sheet 1 is located inward in the width direction from the outer edge in the width direction of the absorbent core.
CN201880084498.0A 2017-12-28 2018-12-18 Absorbent article Active CN111526849B (en)

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JP2017254061A JP6685992B2 (en) 2017-12-28 2017-12-28 Absorbent article
JP2017254055A JP6623208B2 (en) 2017-12-28 2017-12-28 Absorbent articles
JP2017-254061 2017-12-28
JP2017-254055 2017-12-28
PCT/JP2018/046551 WO2019131323A1 (en) 2017-12-28 2018-12-18 Absorbent article

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TWI770340B (en) 2022-07-11
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CN111526849A (en) 2020-08-11
WO2019131323A1 (en) 2019-07-04

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