WO2020217827A1 - 積層体、及び、吸収性物品 - Google Patents

積層体、及び、吸収性物品 Download PDF

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Publication number
WO2020217827A1
WO2020217827A1 PCT/JP2020/013217 JP2020013217W WO2020217827A1 WO 2020217827 A1 WO2020217827 A1 WO 2020217827A1 JP 2020013217 W JP2020013217 W JP 2020013217W WO 2020217827 A1 WO2020217827 A1 WO 2020217827A1
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WO
WIPO (PCT)
Prior art keywords
woven fabric
laminated body
absorbent article
sheet
opening
Prior art date
Application number
PCT/JP2020/013217
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
橋本　達也
大坪　俊文
秀晃 槇
Original Assignee
ユニ・チャーム株式会社
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Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to BR112021017355-2A priority Critical patent/BR112021017355B1/pt
Publication of WO2020217827A1 publication Critical patent/WO2020217827A1/ja

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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
    • 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
    • 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
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • 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
    • 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
    • A61F13/551—Packaging before or after 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
    • A61F13/56—Supporting or fastening means
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
    • A61F13/565—Supporting or fastening means specially adapted for diapers or the like pants type diaper
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/64—Straps, belts, ties or endless bands
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • 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
    • 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
    • A61F2013/15878—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding by thermal bonding
    • 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
    • A61F2013/15934—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for making non-woven
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F2013/49088—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the leg opening
    • A61F2013/49092—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the leg opening comprising leg cuffs
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F2013/8497—Accessories, not otherwise provided for, for absorbent pads having decorations or indicia means

Definitions

  • the present invention relates to a laminate and an absorbent article.
  • a laminate in which two sheet members (for example, non-woven fabric) are joined (laminated) in the thickness direction with a hot melt adhesive or the like may be used. Further, it is also known that at least one of the two sheet members is provided with a plurality of holes (see, for example, Patent Document 1).
  • the hot melt adhesive is applied only to the burr portion as a countermeasure against the hot melt adhesive coming out from the opening of the sheet member.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a laminate capable of ensuring strength and suppressing exudation of hot melt adhesive from pores.
  • a main invention for achieving the above object includes a nonwoven fabric having a plurality of openings, a sheet, and an elastic member sandwiched between the nonwoven fabric and the sheet in an elongated state, and the nonwoven fabric and the said.
  • a laminate having a region in which the sheets are bonded to each other by a hot melt adhesive and at least a part of the hot melt adhesive and a certain opening among the plurality of openings overlap, and is the non-woven fabric.
  • FIG. 3A is an enlarged plan view of the X region of the laminated body 1 of FIG.
  • FIG. 3B is a diagram showing a state in which the laminated body 1 of FIG. 3A is contracted. It is a schematic cross section of the nonwoven fabric 10. It is explanatory drawing which shows the modification (laminate body 1') of the laminated body 1. It is a plane enlarged view of the laminated body 1'in the extended state.
  • FIG. 7A is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminated body 1'in the extended state.
  • FIG. 7B is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminated body 1'. It is a schematic perspective view of the diaper 100.
  • FIG. 5 is a schematic plan view of the unfolded and stretched diaper 100 as viewed from the non-skin side. It is a schematic perspective view of the post-processing tape 135 in the unfolded state.
  • 9 is a schematic cross-sectional view taken along the line AA of FIG. 12A to 12C are schematic views showing a state when the post-treatment tape 135 is peeled off.
  • FIG. 13 is a schematic cross-sectional view taken along the line BB of FIG. It is explanatory drawing of the application area of a hot melt adhesive.
  • a non-woven fabric having a plurality of openings, a sheet, and an elastic member sandwiched between the non-woven fabric and the sheet in an elongated state are provided, and the non-woven fabric and the sheet are bonded to each other by a hot melt adhesive.
  • the nonwoven fabric is a laminate having a region in which the hot melt adhesive and a certain opening among the plurality of openings overlap at least partially, and the nonwoven fabric has an edge adjacent to the certain opening. It is a laminated body characterized by having a non-melted portion in at least a part of the portion and having a fused portion in a portion other than the edge portion.
  • the opening is easily deformed when the elastic member shrinks.
  • the rigidity of the non-woven fabric can be increased by having the molten portion in a portion other than the edge portion of the opening. Therefore, even if the non-woven fabric is provided with a plurality of holes, the strength can be ensured and the hot melt adhesive can be prevented from seeping out from the holes.
  • the area of the certain opening is larger than the area of the molten portion in the elongated state of the laminated body.
  • the pitch of the molten portions arranged in a predetermined direction is smaller than the pitch of the openings arranged in the predetermined direction.
  • the non-woven fabric contains a lubricant in such a laminated body.
  • the fibers become slippery, so that the shrinkage of the pores is not hindered.
  • the deformation of the pores by the elastic member is promoted, and the hot melt adhesive can be prevented from seeping out from the pores.
  • the laminated body has a circular or elliptical cross section of the fibers constituting the non-woven fabric.
  • the fibers become slippery, so that the shrinkage of the pores is not hindered.
  • the deformation of the pores by the elastic member is promoted, and the hot melt adhesive can be prevented from seeping out from the pores.
  • the laminated body has a circular or elliptical planar shape of the openings in the extended state.
  • the opening is easily deformed as compared with the case where the shape of the opening is rectangular or polygonal. Therefore, it is possible to prevent the hot melt adhesive from seeping out from the openings.
  • the non-woven fabric is a spunbonded non-woven fabric.
  • the fibers around the opening are relatively easy to move and the opening is easy to close as compared with other non-woven fabrics (for example, air-through non-woven fabric). Therefore, it is effective in suppressing the exudation of the hot melt adhesive from the pores.
  • the sheet may have a plurality of openings.
  • the numerical aperture is increased, so that the air permeability is improved.
  • the laminate becomes softer, and the elastic member makes it easier to close the openings.
  • the air permeability is further improved in the portion where the openings overlap. Further, in the portion of the sheet that overlaps with the non-opened region without opening, the shadow of the opening is emphasized by the contrast with the see-through feeling of the sheet, and the visibility is improved.
  • the laminated body has a non-joining portion in which the edge portion adjacent to the certain opening and the non-opening region are not joined to each other.
  • the hole diameter of the certain hole is larger than the hole diameter of the hole formed in the sheet, and in a plan view, one hole formed in the sheet is formed. It is desirable to be located inside the certain opening.
  • the air permeability is further improved by overlapping the opening of the non-woven fabric and the opening of the sheet.
  • the overlapping openings emphasize the shadows and improve visibility.
  • an absorbent article characterized by having an absorbent main body having a vertical direction, a horizontal direction, and a front-rear direction orthogonal to each other and absorbing a liquid and any of the above-mentioned laminates will be clarified. ..
  • the hot melt adhesive can be prevented from seeping out from the opening of the non-woven fabric of the absorbent article.
  • Such an absorbent article has a molten portion located between adjacent openings in the vertical direction.
  • the non-woven fabric may be arranged on the non-skin side of the sheet.
  • a non-perforated film is sandwiched between at least one part between the non-woven fabric and the sheet, and the non-woven fabric adheres to the non-skin side surface of the film with the hot melt adhesive. It is desirable that the elastic member is bonded with an agent and the elastic member is bonded to the skin side surface of the film with the hot melt adhesive.
  • the elastic member is provided from one end to the other end of the absorbent article in the left-right direction straddling the absorbent main body, and among the elastic members, the film. It is desirable that the elongation ratio of the portion that overlaps with the film is smaller than the elongation ratio of the portion that does not overlap with the film.
  • the hot melt adhesive does not easily exude at the portion where the film is provided, it is less necessary to shrink the openings in order to suppress the exudation of the hot melt adhesive. Therefore, the elongation ratio of the elastic member may be small at the portion where the film is provided.
  • the texture of the hot melt adhesive that joins the non-woven fabric and the film in the absorbent article is smaller than the texture of the hot melt adhesive that joins the film and the elastic member.
  • the film is an absorbent article and has a design.
  • the design of the film is easily visible because the non-woven fabric is provided with a plurality of holes.
  • a tape member for keeping the absorbent article in a rolled state when the absorbent article is discarded is bonded to the non-skin side of the nonwoven fabric. It is desirable to have the melted portion in at least a part of the bonding region with the tape member.
  • the strength (rigidity) of the non-woven fabric is increased by the molten portion, so that it is possible to prevent the non-woven fabric from tearing when the tape member is peeled off.
  • the bonding region between the non-woven fabric and the sheet of the absorbent article straddles the tape member in the left-right direction.
  • the opening portion (around the tape member) is formed by straddling the bonding region between the non-woven fabric and the sheet in the left-right direction of the post-treatment tape so as to resist the pulling force of the tape member. It is possible to prevent the non-woven fabric from tearing.
  • the non-woven fabric may be arranged on the skin side of the sheet.
  • the perspiration is more easily absorbed by arranging the openings on the skin side.
  • FIG. 1 is a schematic perspective view of the laminated body 1 in an elongated state
  • FIG. 2 is an exploded view of the laminated body 1.
  • FIG. 3A is an enlarged plan view of the X region of the laminated body 1 in FIG. 1 (extended state)
  • FIG. 3B is a diagram showing a state in which the laminated body 1 of FIG. 3A is contracted.
  • FIG. 4 is a schematic cross section of the non-woven fabric 10.
  • the stretched state is a state in which the laminated body 1 is stretched without wrinkles.
  • the dimensions of each member (nonwoven fabric 10, sheet 20) constituting the laminated body 1 match or match the dimensions of the member alone. It refers to a state in which it is stretched to a close size.
  • the direction along the long side of the sheet-shaped laminated body 1 is defined as the long side direction
  • the direction along the short side is defined as the short side direction.
  • the direction orthogonal to the long side direction and the short side direction (the direction in which the members constituting the laminated body 1 overlap) is defined as the thickness direction.
  • the laminated body 1 has a two-layer structure having a non-woven fabric 10 and a sheet 20, and an elastic member 30 is arranged between the non-woven fabric 10 and the sheet 20.
  • the non-woven fabric 10 is provided with a plurality of openings 5 penetrating the front and back at intervals.
  • the material fibers constituting the non-woven fabric 10 include polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) and the like. Further, it is also possible to use not only a single fiber such as polypropylene or polyethylene but also a composite fiber (Bico) having a core-sheath structure made of polypropylene or polyethylene.
  • the non-woven fabric include thermal-bonded non-woven fabric, spun-bonded non-woven fabric, spunlace non-woven fabric, air-through non-woven fabric and the like. In this embodiment, a spunbonded non-woven fabric is used as the non-woven fabric 10. The reason for this will be described later.
  • the material constituting the sheet 20 for example, in addition to the same non-woven fabric as described above, a resin film or the like can be mentioned, and it can also be used as a support sheet for the non-woven fabric 10.
  • the elastic member 30 is a thread-like member having elasticity, and a plurality of elastic members 30 are arranged side by side in the short side direction and fixed in a state of being extended in the long side direction between the non-woven fabric 10 and the sheet 20.
  • the elastic member 30 include thread-like rubber and spandex.
  • a hot melt adhesive (HMA) is directly applied around each elastic member 30, and the nonwoven fabric 10 and the sheet 20 are joined by the hot melt adhesive applied to the elastic member 30.
  • HMA hot melt adhesive
  • EVA type, elastomer type, olefin type, polyester / polyamide type and the like can be used.
  • the present invention is not limited to this, and the non-woven fabric 10 is coated with a hot melt adhesive by another coating method (for example, spiral coating that can be applied spirally, omega coating that can be applied in a wavy shape, control seam coating, etc.).
  • the sheets 20 may be joined. That is, the position of the elastic member 30 may be different from the application region of the hot melt adhesive.
  • the pores 5 can be formed by using, for example, a heated pin member (not shown). Is.
  • the temperature of the pin member is usually set to be equal to or higher than the melting point of the fiber or film material.
  • the temperature of the pin member for opening the hole is equal to or higher than the melting point of each material, the edge portion adjacent to the opening is melted, cooled and solidified to form the opening.
  • the shape of the hole can be maintained by the above method, the hole may become hard.
  • the temperature of the pin member (not shown) at the time of forming the openings 5 is equal to or higher than the softening point of the fiber and lower than the melting point. I try to fit it.
  • the edge portion 5e (see FIG. 3A) adjacent to the opening 5 is a non-melted portion where the fibers are less likely to be melted.
  • the edge portion 5e is an annular portion having a predetermined width (2 mm in the present embodiment) outward from the opening 5 in the radial direction. In the edge portion 5e, the fibers existing in the portion of the opening 5 are more collected, and the fiber density is increased.
  • a plurality of molten portions 4 are formed on the non-woven fabric 10.
  • the molten portion 4 is formed at the time of manufacturing the non-woven fabric 10. That is, the non-woven fabric 10 of the present embodiment is a spunbonded non-woven fabric, and is formed into a sheet by randomly depositing spun long fibers to form a web and heat-sealing in places with an embossed thermal roller. Is formed in.
  • the melting portion 4 is a pattern (embossing) formed by the thermal roller, and the thickness of the melting portion 4 is reduced. Specifically, when the thickness t2 of the edge portion 5e of the opening 5 and the thickness t1 of the molten portion 4 shown in FIG.
  • the thickness t2 of the edge portion 5e was 350 ⁇ m
  • the thickness of the fused portion 4 was measured.
  • T1 was 25 ⁇ m.
  • the non-woven fabric 10 was frozen in liquid nitrogen, and then a predetermined range was cut out to prepare a measurement sample. Then, using a thickness measuring device (for example, KEYENCE digital microscope VHX-2000), an image of the cross section of the measurement sample is taken, and the thickness of each of a plurality of points (for example, 10 points) is measured. The average value was taken as the thickness.
  • a thickness measuring device for example, KEYENCE digital microscope VHX-2000
  • the fiber density is obtained by dividing the basis weight by the thickness.
  • the fiber density of the edge portion 5e of the opening 5 is 0.05 g / cm 3 because the thickness t2 is 350 ⁇ m.
  • the fiber density of the molten portion 4 is 0.72 g / cm 3 because the thickness t1 is 25 ⁇ m. Therefore, the molten portion 4 has a higher density than the edge portion 5e having a high fiber density.
  • the fiber density is high and the fibers are heat-sealed to each other, so that the strength is higher than that of other portions.
  • the molten portion 4 of the present embodiment has a circular planar shape, but is not limited to this, and may have another shape such as a rectangle.
  • a certain opening 5a has a region (in other words, an exposed region of the elastic member 30 in the opening 5a) that overlaps with the elastic member 30 (in other words, a hot melt adhesive). doing.
  • the hot melt adhesive is not directly applied to the elastic member 30, the opening 5a and the elastic member 30 do not have to overlap.
  • the application area of the hot melt adhesive applied between the non-woven fabric 10 and the sheet 20 and a certain opening 5a may at least partially overlap.
  • the edge portion 5ae of a certain opening 5a has a non-melted portion 5ah in which fibers are not melted (in FIG. 3A, the entire edge portion 5ae is a non-melted portion 5ah). Thereby, a certain opening 5a can have flexibility without becoming hard.
  • the elastic member 30 is arranged along the long side direction in an extended state. Therefore, as shown in FIG. 3B, the laminated body 1 contracts in the long side direction due to the contraction of the elastic member 30.
  • the laminated body 1 of the present embodiment since at least a part of the edge portion 5ae of a certain opening 5a has an unmelted non-melted portion 5ah, it is easily deformed (that is, easily closed). It has become. As described above, since the opening 5a is easily closed, it is possible to prevent the hot melt adhesive from seeping out from the opening 5a.
  • the non-woven fabric 10 is provided with the molten portion 4, the strength can be ensured even if the non-woven fabric 10 has a plurality of openings 5. Further, since the melting portion 4 is arranged at a portion other than the edge portion 5e of the opening 5, the opening 5 is not prevented from closing.
  • the area of the opening 5 is larger than the area of the molten portion 4 in the extended state.
  • the molten portion 4 is larger than the area of a certain opening 5a, for example, the molten portion 4 and the molten portion 4 are arranged in a direction orthogonal to the expansion / contraction direction of the elastic member 30 (here, the short side direction).
  • certain openings 5a are lined up, it may be difficult to close certain openings 5a. That is, there is a possibility that the flexibility around a certain opening 5a cannot be maintained.
  • the area of the opening 5 (a certain opening 5a) is larger than the area of the molten portion 4 in the extended state, the flexibility can be maintained and the exudation of the hot melt adhesive can be suppressed.
  • the area of the molten portion 4 is smaller than the area of the opening 5, even if the molten portion 4 overlaps the edge portion 5ae of the opening 5a, at least one of the edges 5ae of the opening 5a. The portion becomes a non-melted portion 5ah. Therefore, flexibility can be maintained.
  • the following method can be used. That is, by extracting the region of the opening 5 or the fusion zone 4 from the image taken with a microscope (for example, a digital microscope manufactured by KEYENCE) and calculating the area of the extraction region, the opening 5 or the fusion zone 4 The area can be calculated.
  • a microscope for example, a digital microscope manufactured by KEYENCE
  • the diameter can be calculated.
  • both the opening 5 and the molten portion 4 are circular, it is sufficient to obtain the diameter (diameter) of the extracted region. The larger the diameter, the larger the area.
  • the openings 5 are arranged at a pitch P1 in the long side direction and the short side direction, respectively, and the molten portions 4 are arranged at a pitch P2 in the long side direction and the short side direction, respectively. I'm out.
  • the pitch P2 of the molten portion 4 is smaller than the pitch P1 of the opening 5.
  • the pitch P2 of the molten portion 4 is smaller than the pitch P1 of the opening 5, the strength in the long side direction and the short side direction can be secured, and the non-woven fabric 10 is less likely to be torn.
  • the openings 5 are arranged at the same pitch (pitch P1) in the long side direction and the short side direction, but the pitch may be different in the long side direction and the short side direction. The same applies to the molten portion 4. Further, the molten portion 4 and the opening 5 may be arranged in a direction oblique to the long side direction and the short side direction. By making the pitch of the melting portion 4 smaller than the pitch of the opening 5 in a specific direction, the strength in that direction can be increased.
  • the non-woven fabric 10 contains a lubricant.
  • a surfactant or an oil agent can be exemplified, and more specifically, an oleic acid amide, an erucic acid amide, a stearic acid amide or the like can be used, or a silicone such as a modified silicone oil containing an amino acid. Animal and vegetable oils such as oil and oleic acid, liquid paraffin and the like can be used. However, it is not limited to this. That is, if the friction coefficient at the position where the predetermined material is applied on the nonwoven fabric 10 can be made lower than the friction coefficient before application, the material can also exhibit the above-mentioned lubricating action. As a result, the fibers constituting the non-woven fabric 10 are more slippery, so that the shrinkage of the pores 5 is not hindered. Therefore, it is possible to prevent the hot melt adhesive from seeping out from the opening 5.
  • the cross section of the fibers constituting the non-woven fabric 10 is circular or elliptical.
  • the cross section of the fiber is circular or elliptical in this way, the fibers become slippery and do not hinder the contraction of the opening 5.
  • the deformation of the opening 5 by the elastic member 30 is promoted, so that the hot melt adhesive can be prevented from seeping out from the opening 5.
  • the planar shape of the opening 5 is circular, but it may be elliptical. As described above, it is desirable that the planar shape of the opening 5 is circular or elliptical. As a result, the opening 5 is easily deformed (closed) as compared with the case where the planar shape is rectangular or polygonal. Therefore, it is possible to prevent the hot melt adhesive from seeping out from the opening 5.
  • the spunbonded non-woven fabric used in this embodiment has relatively easy movement of fibers around the openings as compared with other non-woven fabrics.
  • the air-through non-woven fabric is heat-sealed at a large number of contacts between fibers, and almost the entire surface is in a molten state.
  • the rigidity is increased as a whole and the openings are less likely to be deformed.
  • the spunbonded nonwoven fabric is used as the nonwoven fabric 10
  • the fibers around the openings are relatively easy to move, so that the openings 5 (a certain opening 5a) are easily closed. Therefore, it is effective in suppressing the exudation of the hot melt adhesive.
  • the spunbonded nonwoven fabric is provided with a plurality of embosses (melted portions 4), the strength can be ensured even if the nonwoven fabric 10 has a plurality of openings 5.
  • FIG. 5 is a schematic explanatory view showing a modified example of the laminated body 1 (laminated body 1').
  • a plurality of openings are also formed in the sheet 20.
  • the opening 6 is provided so as to penetrate the non-woven fabric 10 and the sheet 20.
  • the portion where the opening 5 and the opening 6 overlap is an opening portion, so that the outline of each opening cannot be seen.
  • the outline of each opening is left as a solid line.
  • the opening 6 is formed at a position where it does not overlap with the elastic member 30.
  • the non-woven fabric 10 and the sheet 20 are joined by a hot melt adhesive directly applied to the elastic member 30.
  • the laminated body 1 By having the plurality of openings 5 of the nonwoven fabric 10 and the plurality of openings 6 provided in the nonwoven fabric 10 and the sheet 20, the laminated body 1'increases the numerical aperture and further secures the air permeability. It will be easier. In addition, the flexibility is increased, and the openings 5 of the non-woven fabric 10 are easily closed.
  • FIG. 6 is an enlarged plan view of the laminated body 1'in the extended state.
  • FIG. 6 shows a state in which the non-woven fabric 10 and the sheet 20 are overlapped with each other.
  • a plurality of openings (openings having a region overlapping the elastic member 30) among the plurality of openings 5 of the nonwoven fabric 10 of the laminated body 1'are defined as openings 5a, and are provided on the sheet 20 side.
  • the opening of one of the holes 6 of the above is 6a.
  • the illustration of the molten portion 4 of the non-woven fabric 10 is omitted.
  • the opening 5a overlaps with one of the plurality of openings 6 provided on the sheet 20 side. You may.
  • the air permeability is further improved by overlapping the openings 5 (5a) and 6 (6a). Further, in the overlapping portion of the edge portion of the opening (the portion indicated by K in the figure), the contour of the opening 5 (6) becomes clearer due to the gathered fibers, so that the visibility is improved.
  • FIG. 7A is a schematic enlarged view for explaining an example of openings 5 and 6 of the laminated body 1'in the extended state.
  • the non-perforated region of the sheet 20 is defined as the non-perforated region 60 (the portion indicated by the diagonal line downward to the left).
  • the non-perforated region 60 the portion indicated by the diagonal line downward to the left.
  • at least a part of a certain opening 5a has a region R (a portion shown in a grid pattern) that overlaps with the non-opening region 60 of the sheet 20.
  • the edge portion 5ae adjacent to a certain opening 5a and the non-opening region 60 have a non-joining portion 70 that is not joined to each other.
  • FIG. 7B is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminated body 1', and shows an example of the relationship between the sizes of the openings 5 and the openings 6 in the extended state.
  • the hole diameter of a certain opening 5a (5) in the opening 5 is 5 adi
  • the hole diameter of one of the plurality of openings 6 provided on the sheet 20 side is 6 adi
  • the hole diameter 5 adi is , It is preferable that the hole diameter is larger than 6 adi.
  • the size of the hole diameters of 5 adi and 6 adi in this example if the edge of the lower hole (the edge of the opening 6a in FIG.
  • the hole diameter of the upper hole (5a) is larger. If it cannot be seen, it is assumed that the hole diameter of the upper hole (5a) is smaller. Further, in a plan view, it is preferable that the opening 6a is located inside the opening 5a. As a result, the air permeability of the laminated body 1'is further improved at the portion where the opening 5a of the non-woven fabric 10 and the opening 6a of another sheet 20 overlap. Further, the overlapping openings 5a and 6a form a shadow in the overlapping portion of the openings 5a and 6a in a plan view, and the visibility of the openings is improved.
  • FIG. 8 is a schematic perspective view of the diaper 100.
  • FIG. 9 is a schematic plan view of the unfolded and stretched diaper 100 as viewed from the non-skin side.
  • the above-mentioned “deployed state” refers to both ends of the ventral waist circumference portion (ventral waist circumference portion 120 described later) and the dorsal waist circumference portion (dorsal side described later) in the width direction (left-right direction) of the diaper 100.
  • the "stretched state" of the diaper 100 is a state in which the entire diaper 100 (the entire product) is stretched without wrinkles, specifically, each member constituting the diaper 100 (for example, the absorbent main body 110 described later, the belly). It refers to a state in which the dimensions of the side waist circumference 120, the dorsal waist circumference 130, etc.) are extended until they match or are close to the dimensions of the member alone.
  • the diaper 100 has a vertical direction, a width direction, and a front-back direction that intersect each other in the pants-shaped state shown in FIG.
  • the diaper 100 has an absorbent main body 110 that is applied to the crotch part of the wearer and absorbs liquid such as excrement, a ventral waist circumference 120 that covers the ventral side of the wearer, and a dorsal part of the wearer. It is a so-called three-piece type disposable diaper having a dorsal waist circumference 130 that covers the diaper.
  • the diaper 100 has a longitudinal direction and a left-right direction that intersect each other.
  • One side in the longitudinal direction in this deployed state is also referred to as “ventral” or “anterior”
  • the other side in the longitudinal direction is also referred to as “dorsal” or “rear”.
  • the longitudinal direction in the unfolded state is the direction along the vertical direction in the pants-shaped state.
  • the thickness direction is the direction in which the materials constituting the diaper 100 are laminated.
  • the side in contact with the wearer in the thickness direction is the skin side, and the opposite side is the non-skin side.
  • the absorbent main body 110 is fixed in a state of being hung between the ventral waist circumference 120 and the dorsal waist circumference 130 arranged substantially in parallel.
  • the absorbent body 110 is folded in half at the central portion C10 in the longitudinal direction thereof, and the ventral waist circumference 120 and the dorsal waist circumference 130 facing each other are mutually opposed at the lateral edges 120e and 130e.
  • the diaper 100 is in a worn state in which the waist opening BH and the pair of leg openings LH as shown in FIG. 8 are formed.
  • the absorbent body 110 has an absorbent core 111 that absorbs a liquid.
  • the absorbent core 111 is a member formed by laminating a liquid absorbent material, and can absorb excrement such as urine.
  • a liquid-absorbing fiber such as pulp fiber can be used.
  • the absorbent core 111 may contain, for example, a highly absorbent polymer as the liquid absorbent granules, or may contain a liquid absorbent material other than the liquid absorbent fibers and the liquid absorbent granules. May be good.
  • the ventral waist circumference 120 is a portion that covers the ventral waist circumference of the wearer, and is a non-woven fabric 121 arranged on the non-skin side in the thickness direction, a sheet 122 arranged on the skin side of the non-woven fabric 121, and a non-woven fabric. It has a plurality of elastic members 123 provided between the 121 and the sheet 122.
  • the dorsal waist circumference 130 is a portion that covers the wearer's back waist circumference, and is arranged on the non-skin side of the non-woven fabric 131 in the thickness direction and on the skin side of the wearer rather than the non-woven fabric 131. It has a sheet 132 and a plurality of elastic members 133 provided between the non-woven fabric 131 and the sheet 132. Further, a post-treatment tape 135 (corresponding to a tape member) is provided on the non-skin side surface of the dorsal waist circumference portion 130.
  • the laminated body 1 is used for the waist circumference portion (ventral waist circumference portion 120 and dorsal waist circumference portion 130) of the diaper 100, respectively. That is, the non-woven fabrics 121 and 131 are made of a non-woven fabric 10 having a plurality of openings 5, the sheets 122 and 132 are made of a sheet 20, and the plurality of elastic members 123 and 133 are made of an elastic member 30. Has been done.
  • the non-woven fabrics 121 and 131 having a plurality of holes 5 are arranged on the non-skin side of the sheets 122 and 132 having no holes, respectively. As a result, it is possible to visually recognize that there is an opening 5 from the outside. Further, since the non-perforated sheets 122 and 132 are on the skin side, the skin feels good and the skin can be prevented from being damaged.
  • the plurality of elastic members 123 are thread-like members having elasticity, are arranged side by side in the vertical direction between the non-woven fabric 121 and the sheet 122, and are fixed in a state of being extended in the horizontal direction. .. That is, the left-right direction corresponds to the long side direction of the laminated body 1, and the vertical direction corresponds to the short side direction of the laminated body 1. Further, the plurality of elastic members 133 are arranged side by side in the vertical direction between the non-woven fabric 131 and the sheet 132, and are fixed in a state of being extended in the horizontal direction. As a result, the ventral waist circumference 120 and the dorsal waist circumference 130 are provided with elasticity in the left-right direction.
  • the non-woven fabric 121 (10) of the ventral waist circumference 120 is provided with a plurality of openings 5, and is joined to the sheet 122 by a hot melt adhesive directly applied around the plurality of elastic members 123.
  • the non-woven fabric 131 (10) of the dorsal waist circumference 130 is provided with a plurality of openings 5, and is joined to the sheet 132 by a hot melt adhesive directly applied around the plurality of elastic members 133. ing.
  • the laminated body 1 for the waistline portion of the diaper 100 the plurality of openings 5 are easily deformed (easily closed), so that the hot melt adhesive does not seep out from the waistline portion 5 of the waistline portion. can do.
  • the non-woven fabrics 121 and 131 are smaller than the pitch (pitch P1) of the holes 5 in the vertical direction (corresponding to the short side direction in FIG. 3) and the horizontal direction (corresponding to the long side direction in FIG. 3), respectively.
  • a plurality of fused portions 4 are provided at a pitch (pitch P2). Even if the non-woven fabrics 121 and 131 are provided with a plurality of openings 5, the strength (rigidity) can be ensured by providing the plurality of molten portions 4. Further, since the melting portion 4 is provided at a portion other than the edge portion 5e of the opening 5, the contraction of the opening 5 is not hindered.
  • the melting portions 4 are always located between the openings 5 adjacent to each other in the vertical direction (FIG. 3). See short side direction).
  • the material strength of that portion is weak, so that the adjacent openings are opened when the diaper 100 is pulled in the vertical direction (for example, when the diaper 100 is pulled up). There is a risk of tearing between the holes 5.
  • the melting portion 4 is always arranged between the adjacent openings 5 in the vertical direction.
  • the strength in the vertical direction can be increased, and tearing in the region between the openings 5 adjacent to each other in the vertical direction can be suppressed.
  • the post-treatment tape 135 is a member for holding the diaper 100 in a rolled state when the used diaper 100 is discarded.
  • the non-woven fabric 131 is located at the center of the dorsal waist circumference 130 in the left-right direction. It is provided on the non-skin side surface of the diaper (see FIG. 9).
  • FIG. 10 is a schematic perspective view of the post-processing tape 135 in the unfolded state. Further, FIG. 11 is a schematic cross-sectional view taken along the line AA of FIG. Note that FIG. 11 omits the illustration of the absorbent main body 110.
  • the post-treatment tape 135 has a tape main body 135a, a support portion 135b, and a knob portion 135c.
  • the tape body 135a is an elongated strip-shaped member. As shown in FIG. 11, the tape body 135a provided on the diaper 100 is in a state of being folded in the longitudinal direction. That is, in the folded tape body 135a, at least a part of the surfaces facing each other (including the surface facing the support portion 135b) is provided with a peelable adhesive layer (not shown). As a result, the tape body 135a is temporarily fixed in the folded state.
  • the support portion 135b is a portion that supports the tape main body 135a, and in the present embodiment, is a portion that is bifurcated (front and back directions of the tape main body 135a) at the end portion of the tape main body 135a. In other words, one end of the tape body 135a is connected between both ends of the support portion 135b. Further, as shown in FIG. 11, the surface of the support portion 135b opposite to the tape main body 135a is the non-skin side surface of the dorsal waist circumference 130 (that is, the non-skin side surface of the non-woven fabric 131 having the opening 5). ), It is fixed (joined) in a non-peelable manner with a hot melt adhesive or the like. As a result, a bonding region 136 is formed between the post-treatment tape 135 (support portion 135b) and the non-woven fabric 131.
  • the knob portion 135c is a portion to be gripped by a finger when the post-processing tape 135 (tape body 135a) is peeled off, and is provided at an end portion of the tape body 135a opposite to the support portion 135b.
  • each member of the post-treatment tape 135 examples include resin materials such as polyethylene and polypropylene, but the material is not limited to this.
  • a pulp material such as paper may be used.
  • 12A to 12C are schematic views showing a state when the post-treatment tape 135 is peeled off.
  • the tape body 135a is wound around the diaper 100 rolled in the longitudinal direction while keeping the absorbent body 110 inside.
  • the diaper 100 can be held in a rolled state.
  • the non-woven fabric 131 (10) has a molten portion 4 in at least a part of the bonding region 136 (the bonding region between the post-treatment tape 135 and the non-woven fabric 131).
  • the bonding region 136 the bonding region between the post-treatment tape 135 and the non-woven fabric 131.
  • the non-woven fabric 131 and the sheet 132 are joined by a hot melt adhesive (not shown) directly applied around the elastic member 133. Then, in the thickness direction, the bonding region 136 between the support portion 135b (post-treatment tape 135) and the nonwoven fabric 131 and the bonding region between the nonwoven fabric 131 and the sheet 132 (here, the elastic member 133) partially overlap. As described above, it is desirable that the bonding region 136 and the bonding region between the non-woven fabric 131 and the sheet 132 overlap at least partially in the thickness direction. As a result, when the post-treatment tape 135 is peeled off, only the non-woven fabric 131 is not pulled, so that the non-woven fabric 131 is not easily torn. In addition, the post-treatment tape 135 can be easily peeled off.
  • the nonwoven fabric 131 and the sheet 132 are joined by a hot melt adhesive applied around the elastic member 133, and the elastic member 133 is arranged along the left-right direction, so that the nonwoven fabric 131
  • the bonding region between the sheet 132 and the sheet 132 (in other words, the elastic member 133) straddles the post-treatment tape 135 in the left-right direction (see FIG. 9).
  • the non-woven fabric 131 (around the post-treatment tape 135) may be pulled toward the post-treatment tape 135 by the pulling force of the post-treatment tape 135 and may be torn from the opening 5.
  • the non-woven fabric 131 and the sheet 132 are straddled in the left-right direction of the post-treatment tape 135 so as to resist the pulling force of the post-treatment tape 135, the non-woven fabric is formed through the openings 5 (around the post-treatment tape 135). It is possible to prevent 151 from being torn.
  • the support portion 135b is bifurcated at the end of the tape main body 135a, when the tape main body 135a is pulled, it is between both ends of the support portion 135b (support). The tensile stress is greatest at the connection portion between the portion 135b and the tape body 135a). As a result, even if the tape body 135a is pulled, peeling from the end portion of the support portion 135b is unlikely to occur.
  • the openings 5 of the non-woven fabrics 121 and 131 are closed by using the laminated body 1 for the waist circumference (ventral waist circumference 120, dorsal waist circumference 130). Since it is easy to use, it is possible to suppress the exudation of the hot melt adhesive from the opening 5 of the waist circumference portion.
  • the nonwoven fabrics 121 and 131 having a plurality of openings are arranged on the non-skin side of the sheets 122 and 132, respectively, but the present invention is not limited to this, and the nonwoven fabrics 121 and 131 are used. It may be arranged closer to the skin than the sheets 122 and 132. In this case, the presence of the opening 5 on the skin side makes it easier to absorb sweat.
  • the laminated body 1 is used for the waist circumference portion (ventral waist circumference portion 120, dorsal waist circumference portion 130) of the diaper 100, but the laminated body 1'(see FIG. 5) of the modified example is used. May be good. Thereby, the air permeability can be further improved. In addition, the flexibility can be improved, and the opening 5 becomes easier to close.
  • FIG. 13 is a schematic plan view of the unfolded and stretched diaper 200 as viewed from the skin side.
  • FIG. 14 is a schematic cross-sectional view taken along the line BB of FIG.
  • FIG. 15 is an explanatory view of a coating area of the hot melt adhesive.
  • the diaper 200 also has a vertical direction, a width direction, and a front-rear direction that intersect each other in the pants type state (not shown), and in the unfolded state of FIG. 13, the longitudinal directions that intersect each other. It has a left-right direction and a thickness direction.
  • the definition of each direction is the same as diaper 100,
  • the diaper 200 has an absorbent main body 210, a top sheet 220, a cover sheet 230, a film 240, and an elastic member around the legs 250 (corresponding to an elastic member).
  • an elastic member around the legs 250 corresponding to an elastic member.
  • the illustration of the elastic member around the waist is omitted.
  • the absorbent body (absorbable core) 210 has a function of absorbing excrement such as urine, has a substantially rectangular shape in a plan view as shown in FIG. 13, and has its longitudinal direction along the vertical direction of the diaper 1. It is placed in the center in the horizontal direction.
  • the absorbent main body 210 is formed by molding a liquid absorbent fiber such as pulp fiber into a predetermined shape, and a highly absorbent polymer (so-called SAP) or the like is mixed therein.
  • the top sheet 220 is a liquid-permeable sheet member that is arranged on the skin side of the absorbent body 210 in the thickness direction and comes into contact with the wearer's skin when the diaper 200 is worn.
  • the top sheet 220 of the present embodiment is a non-perforated sheet composed of the sheet 20 of the laminated body 1.
  • the cover sheet 230 is arranged on the non-skin side of the diaper 200.
  • the cover sheet 230 of the present embodiment is composed of the non-woven fabric 10 of the laminated body 1, and has a plurality of openings 5 (see FIG. 15) and a plurality of molten portions (not shown here).
  • the film 240 is a liquid-impermeable, non-perforated sheet member arranged on the non-skin side of the absorbent body 210, and is formed of, for example, a resin film.
  • a resin film By providing the film 240, it is possible to prevent water such as urine absorbed by the absorbent body 210 from moving (permeating) to the wearer's clothing side. Further, by providing the film 240, it is possible to suppress the exudation of the hot melt adhesive (described later).
  • the film 240 is provided in one portion (a wider range than the absorbent body 210) between the top sheet 220 and the cover sheet 230. Further, a pattern (not shown) is applied to the non-skin side surface of the film 240.
  • the design includes a pattern, a picture, a symbol, a character, and the like, and is not particularly limited.
  • the cover sheet 230 has a plurality of openings 5, the design of the film 240 can be easily visually recognized.
  • the leg circumference elastic member 250 is provided so as to straddle the absorbent main body 210 from one end to the other end in the left-right direction of the diaper 1. Further, as shown in FIG. 13, in the diaper 200, the leg elastic member 250 is arranged in a curved shape.
  • the leg elastic member 250 when the leg elastic member 250 is arranged in a curved shape in this way, the hot melt adhesive cannot be directly applied around the leg elastic member 250. Therefore, a hot melt adhesive for fixing the leg elastic member 250 is applied to the non-woven fabric (here, the cover sheet 230). In this case, it is necessary to increase the amount of the hot melt adhesive applied in order to securely fix the curved leg circumference elastic member 250. However, if the amount of the hot melt adhesive applied is increased, the risk of the hot melt adhesive oozing out from the openings 5 of the cover sheet 230 increases. In particular, in the inseam portion, since the extension ratio of the leg circumference elastic member 250 is small as described later, the opening 5 is difficult to close and there is a high possibility that the hot melt adhesive will seep out.
  • a non-perforated film 240 is provided in a part between the top sheet 220 and the cover sheet 230 (specifically, a portion overlapping the absorbent main body 210). Then, the non-skin side surface of the cover sheet 230 and the film 240 are joined with a hot melt adhesive (referred to as Ha), and the leg circumference elastic member 250 and the skin side surface of the film 240 are joined with a hot melt adhesive (Hb). It is fixed (joined) with). The application conditions of the hot melt adhesive Ha and the hot melt adhesive Hb will be described later.
  • the leg elastic member 250 is arranged between one end and the other end in the left-right direction in a state of being extended at different extension ratios. More specifically, the stretch ratio of the portion of the leg elastic member 250 that overlaps with the film 240 is smaller than the elongation ratio of the portion that does not overlap with the film 240.
  • the "elongation ratio" of the elastic member is an index indicating how many times the elastic member is stretched (pulled) with respect to its natural length (length in a no-load state) at the time of manufacture. For example, when the elastic member is provided with its natural length, the elongation ratio is 1 time, and when it is pulled to a length twice the natural length, the extension ratio is 2 times. Therefore, the larger the elongation ratio, the larger the contraction force.
  • the portion of the leg elastic member 250 that overlaps with the film 240 has a portion that overlaps with the absorbent main body 210 at the central portion in the left-right direction. From this, it is possible to prevent the absorbent main body 210 from contracting excessively in the left-right direction by reducing the elongation ratio of this portion. Further, since the hot melt adhesive (here, the hot melt adhesive Hb) does not easily exude at the portion overlapping with the film 240, it is not necessary to shrink the opening 5 in order to suppress the exudation of the hot melt adhesive. Therefore, the extension ratio of the leg elastic member 250 may be small. In the portion overlapping with the film 240, the elongation ratio may differ depending on the position in the left-right direction.
  • the extension ratio at the left-right central portion may be smaller than the extension ratio at both left-right ends.
  • a gradient is generated in the stress, and the shrinkage of the absorbent main body 210 can be suppressed without impairing the fit.
  • the portion that does not overlap with the film 240 is arranged so that the elongation ratio is large.
  • the contraction force can be strengthened and the fit around the legs can be improved.
  • the opening 5 of the cover sheet 230 can be easily closed.
  • the hot melt adhesive Ha is applied between the cover sheet 230 and the film 240 (that is, the portion where the film 240 is arranged).
  • the hot melt adhesive Hb is applied to the arrangement portion (the region indicated by the diagonal line in the figure) of the leg circumference elastic member 250 as shown in FIG.
  • the coating type include known coating methods such as spiral coating that can be applied in a spiral shape, omega coating that can be applied in a wavy shape, and control seam coating.
  • the basis weight of the hot melt adhesive Ha (coating amount per unit area) is made smaller than the basis weight of the hot melt adhesive Hb.
  • the basis weight of the hot melt adhesive Ha is 0.5 to 2 g / m 2
  • the basis weight of the hot melt adhesive Hb is 4 to 10 g / m 2 .
  • the hot melt adhesive Ha By reducing the texture of the hot melt adhesive Ha that joins the cover sheet 230 and the film 240 in this way, it is possible to prevent the hot melt adhesive from seeping out from the openings 5 of the cover sheet 230 (nonwoven fabric 10). ..
  • the extension ratio of the elastic leg member 250 is small and the elastic body 21 overlaps with the absorbent body 21, so that the cover sheet 230 contracts. Difficult (opening 5 is difficult to close). Therefore, by reducing the basis weight of the hot melt adhesive Ha, it is possible to suppress the exudation of this portion from the opening 5.
  • the leg elastic member 250 can be securely fixed to the cover sheet 230 or the film 240. Further, in the region where the film 240 is arranged, even if the basis weight of the hot melt adhesive Hb is large, the film 240 is located on the non-skin side, so that the hot melt adhesive Hb does not exude. Further, in the region where the film 240 is not arranged, the extension ratio of the leg elastic member 250 is large and the cover sheet 230 is easily contracted (the opening 5 is easily closed). Therefore, the exudation of the hot melt adhesive Hb can be suppressed.
  • 1 Laminated body, 1'Laminated body 4 Melted part, 5 openings, 5e edges, 5a perforations, 5ae edges, 5ah non-melted parts, 6 opening, 10 non-woven fabric, 20 sheets, 30 elastic members, 60 non-perforated area, 100 diapers (absorbent articles), 110 absorbent body, 120 ventral girth, 120e left-right side edge, 121 non-woven fabric, 122 sheets, 123 elastic members, 130 dorsal girth, 130e lateral edge, 131 non-woven fabric, 132 sheet, 133 elastic member, 135 Post-treatment tape (tape member), 135a tape body, 135b support, 135c knob, 200 diapers (absorbent articles), 210 Absorbent body, 220 Top sheet (sheet), 230 cover sheet (nonwoven fabric), 240 film, 250 Leg circumference elastic member (elastic member)

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
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  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
PCT/JP2020/013217 2019-04-26 2020-03-25 積層体、及び、吸収性物品 WO2020217827A1 (ja)

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JP6800272B2 (ja) * 2019-04-26 2020-12-16 ユニ・チャーム株式会社 積層体、及び、吸収性物品
CN113681995B (zh) * 2021-08-25 2023-01-13 泉州市汉威机械制造有限公司 一种弹性腰围无纺布及其生产方法
JP2023177093A (ja) * 2022-06-01 2023-12-13 ユニ・チャーム株式会社 パンツ型吸収性物品、及び、パンツ型吸収性物品の製造方法

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JP2020179647A (ja) 2020-11-05
JP6800272B2 (ja) 2020-12-16
CN212853824U (zh) 2021-04-02
TW202103658A (zh) 2021-02-01

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