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WO2021020171A1 - Procédé de fabrication d'élément de feuille pour article absorbant, et article absorbant - Google Patents

Procédé de fabrication d'élément de feuille pour article absorbant, et article absorbant Download PDF

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Publication number
WO2021020171A1
WO2021020171A1 PCT/JP2020/027844 JP2020027844W WO2021020171A1 WO 2021020171 A1 WO2021020171 A1 WO 2021020171A1 JP 2020027844 W JP2020027844 W JP 2020027844W WO 2021020171 A1 WO2021020171 A1 WO 2021020171A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent article
elastic member
sheet
hole
manufacturing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/027844
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English (en)
Japanese (ja)
Inventor
祐介 川上
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
Original Assignee
Unicharm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unicharm Corp filed Critical Unicharm Corp
Priority to CN202080047427.0A priority Critical patent/CN114007564A/zh
Publication of WO2021020171A1 publication Critical patent/WO2021020171A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15723—Partitioning batts; Cutting
    • 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
    • A61F13/15764—Transferring, feeding or handling devices; Drives
    • 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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • 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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—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 specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—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 of the pads
    • 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

Definitions

  • the present invention relates to a method for manufacturing a sheet member for an absorbent article and an absorbent article.
  • Patent Document 1 discloses a disposable non-woven fabric provided with a large number of holes penetrating the front and back surfaces at intervals.
  • Absorbent articles such as disposable diapers are usually provided with elastic elastic members such as rubber threads to impart elasticity, and the rubber threads and the like are provided on the sheet members constituting the disposable diapers. It may pop out from the through hole (opening for ventilation). Then, the user who visually recognizes the thread rubber or the like protruding from the through hole has a negative effect that the absorbent article is defective or the elasticity does not work well and a good fit cannot be obtained. It is easy to make an impression.
  • elastic elastic members such as rubber threads to impart elasticity
  • the rubber threads and the like are provided on the sheet members constituting the disposable diapers. It may pop out from the through hole (opening for ventilation). Then, the user who visually recognizes the thread rubber or the like protruding from the through hole has a negative effect that the absorbent article is defective or the elasticity does not work well and a good fit cannot be obtained. It is easy to make an impression.
  • the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a sheet member for an absorbent article in which an elastic member does not protrude from a through hole.
  • the main invention for achieving the above object is a transport step of transporting a first sheet continuum provided with a plurality of through holes and a second sheet continuum, respectively, the first sheet continuum, and the said. Elasticity of the first sheet continuum or the second sheet continuum in a state of being extended in the transport direction between the first sheet continuum and the second sheet continuum laminated on one side in the thickness direction.
  • a joint region forming step of forming a plurality of joint regions for attaching members, and the elastic member in an extended state are cut between two adjacent joint regions in the transport direction, and the cut elastic member is obtained.
  • An absorbent article comprising, an elastic member cutting step of shrinking along the transport direction so as not to protrude from the through hole to the other side of the first sheet continuum in the thickness direction.
  • FIG. 5 is a schematic plan view of the unfolded and stretched diaper 1 as viewed from the skin side. It is the schematic sectional drawing of the line AA of FIG. It is a schematic side view explaining the manufacturing apparatus 100 for manufacturing a sheet member 2. It is a flow chart which shows the manufacturing process of a sheet member 2. It is a schematic plan view which shows an example of the arrangement of the joint area 50. 7A to 7C are views for explaining the mechanism by which the elastic member pops out from the through hole in the conventional elastic sheet member provided with the through hole.
  • FIG. 6 is a schematic cross-sectional view taken along the line BB of FIG. It is a schematic side view explaining the manufacturing apparatus 200 for manufacturing a sheet member 6. It is a schematic plan view which shows an example of the arrangement of the joint area 50. It is the schematic plan view explaining the modification of the joint region 50.
  • 19A and 19B are explanatory views of the attachment function of the elastic member 3 by the welded portion pair 52S.
  • a plurality of joint regions for attaching the elastic member in a state of being extended in the transport direction of the first sheet continuum or the second sheet continuum are formed between the second sheet continuum laminated on the side.
  • the step of forming the joint region and the elastic member in the extended state are cut between the two joint regions adjacent to each other in the transport direction, and the cut elastic member is cut from the through hole to the first sheet continuum.
  • a method for producing a sheet member for an absorbent article which comprises an elastic member cutting step of shrinking along the conveying direction so as not to pop out to the other side in the thickness direction.
  • the joint region has a first joint region, the first joint region and a second joint region adjacent to the downstream side in the transport direction, and the cutting In the step, it is desirable that the elastic member is cut at a position closer to the first joint region than the second joint region in the transport direction.
  • the contraction force when the elastic member contracts (cuts back) from the cut position to the joint region side can be relatively reduced. This makes it difficult for the elastic member to get caught in the outer edge of the through hole, and it becomes easy to prevent the elastic member from popping out of the through hole.
  • the height of the portion where the outer edge portion of the through hole protrudes in the thickness direction is 0.2 mm or less.
  • the diameter of the through hole is three times or less the diameter of the elastic member in the method for manufacturing a sheet member for an absorbent article.
  • the diameter of the through hole is smaller than twice the diameter of the elastic member in the method for manufacturing a sheet member for an absorbent article.
  • the diameter of the through hole on the one side in the thickness direction is smaller than the diameter of the through hole on the other side in the thickness direction. ..
  • the elastic member is prevented from jumping out from one step side (skin side) to the other side (non-skin side) in the thickness direction of the through hole, and the other side (skin side).
  • the through hole can be easily seen on the non-skin side), and the user can easily recognize that the through hole has good air permeability.
  • the through hole is formed by penetrating a pin from one side to the other side in the thickness direction of the first sheet continuum, and the through hole is formed.
  • the pins are heated to a temperature equal to or higher than the softening point of the thermoplastic fibers contained in the first sheet continuum and lower than the melting point.
  • the pin portion can be pushed in and pulled out while heating the first sheet continuum, so that the pin portion to the first sheet continuum softened by heating can be pushed in and pulled out. Is easy to insert, and the open shape of the formed through hole is easily maintained.
  • the pin is brought to a temperature closer to the softening point than the melting point of the thermoplastic fiber contained in the first sheet continuum. It is desirable that it is heated so that it becomes.
  • the bonding region has a first bonding region, the first bonding region, and a second bonding region adjacent to the downstream side in the transport direction, and the transport In the direction, it is desirable that an adhesive is provided between the first bonding region and the second bonding region.
  • the elastic member is lightly fixed by the adhesive, so that blurring is less likely to occur when the elastic member contracts. Therefore, when the elastic member contracts, it becomes difficult to get caught in the outer edge portion of the through hole, and it becomes easier to prevent the elastic member from jumping out of the through hole.
  • the sheet member for an absorbent article is a waist member of a pants-type disposable diaper
  • the elastic member is a fit gather elastic member that imparts elasticity to the waist member. It is desirable that at least a part of the fit gather elastic member is cut in the elastic member cutting step.
  • a sheet member for an absorbent article it is possible to provide a sheet member capable of manufacturing a pants-type disposable diaper in which the fit gather elastic member does not protrude from the through hole in the waist circumference portion.
  • the sheet member for an absorbent article is an exterior body of a tape-type disposable diaper
  • the elastic member is a crotch gather that imparts elasticity to the inseam region of the exterior body. It is an elastic member, and it is desirable that at least a part of the crotch gather elastic member is cut in the elastic member cutting step.
  • a sheet member for an absorbent article it is possible to provide a sheet member capable of manufacturing a tape-type disposable diaper in which the crotch gather elastic member does not protrude from the through hole in the inseam area.
  • first sheet member having a vertical direction and a horizontal direction intersecting each other and having a plurality of through holes on the surface, and a second sheet member laminated on the skin side of the first sheet member.
  • An elastic member provided between the first seat member and the second seat member in a state of being extended in the left-right direction, and a plurality of the elastic members attached to the first seat member and the second seat member.
  • the elastic member cut between the two adjacent portions in the left-right direction which is an absorbent article including the joint portion of the above, is the first sheet member from the through hole.
  • An absorbent article characterized in that it contracts along the left-right direction so as not to pop out to the non-skin side of the skin becomes clear.
  • a plurality of the elastic members are provided at intervals in the vertical direction in the absorbent article, and the plurality of elastic members are cut at different positions in the left-right direction.
  • the mark of cutting the elastic member becomes less noticeable, and the appearance of the absorbent article can be improved.
  • the height of the portion of the absorbent article in which the outer edge portion of the through hole protrudes toward the skin side is 0.2 mm or less.
  • the diameter of the through hole of the absorbent article is 3 times or less the diameter of the elastic member.
  • the diameter of the through hole is smaller than twice the diameter of the elastic member for such an absorbent article.
  • the diameter of the through hole on the skin side of the absorbent article is smaller than the diameter of the through hole on the non-skin side.
  • the through hole can be easily visually recognized, and the user can easily recognize that the article is an absorbent article having good air permeability.
  • the first sheet member is a non-woven fabric containing a thermoplastic fiber, and the ratio of the portion where the thermoplastic fiber is not melted in the outer edge portion of the through hole is the thermoplastic fiber. Is more than the proportion of the melted portion.
  • the rigidity at the outer edge of the through hole can be reduced. Therefore, when the elastic member contracts (cuts back), it is difficult for the elastic member to be caught in the outer edge portion, and it is difficult for the elastic member to pop out from the through hole. Further, it is possible to realize an absorbent article having a good touch in the region where the through hole is formed.
  • the seat member is a waistline member of a pants-type disposable diaper
  • the elastic member is a fit gather elastic member that imparts elasticity to the waistline member, and the fit gather elastic member. It is desirable that at least a part is cut at a predetermined position in the left-right direction.
  • the sheet member is an exterior body of a tape-type disposable diaper
  • the elastic member is a crotch gather elastic member that imparts elasticity to the inseam region of the exterior body, and the crotch gather. It is desirable that at least a part of the elastic member is cut at a predetermined position in the vertical direction.
  • Such an absorbent article has a vertical direction along the vertical direction in the unfolded state, and in the vertical direction, the ventral end of the absorbent article in the unfolded state and the elasticity of the crotch gather elastic member.
  • the distance between the ventral end of the portion on which is acting is the dorsal end of the absorbent article in the deployed state and the dorsal end of the portion on which the elasticity of the crotch gather elastic member is acting. It is desirable that it is larger than the distance between them.
  • a pants-type disposable diaper 1 for infants (hereinafter, also simply referred to as “diaper 1”) will be described as an example.
  • the present invention is not limited to the above, and the absorbent article according to the first embodiment can also be applied to disposable diapers for adults.
  • FIG. 1 is a schematic perspective view of the diaper 1 of the first embodiment.
  • FIG. 2 is a schematic plan view of the unfolded and stretched diaper 1 as viewed from the skin side.
  • FIG. 3 is a schematic cross-sectional view taken along the line AA of FIG.
  • the "extended state" of the diaper 1 is a state in which the diaper 1 is extended without wrinkles, and the dimensions of each member (for example, the ventral side portion 20 described later) that constitutes the diaper 1 match the dimensions of the member alone. It is in a stretched state until it reaches a length close to that.
  • the diaper 1 has an absorbent body 10, a ventral portion 20, and a dorsal portion 30.
  • the absorbent body 10 is placed in the wearer's crotch.
  • the ventral portion 20 and the dorsal portion 30 are also "seat members 2" that are applied to the wearer's waist circumference.
  • the pants-shaped diaper 1 has a vertical direction, a horizontal direction, and a thickness direction orthogonal to each other. In the thickness direction, the side that comes into contact with the wearer is called the skin side, and the side that does not come into contact with the wearer is called the non-skin side. Further, in FIGS.
  • the unfolded and extended diaper 1 has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other.
  • the longitudinal direction is the direction along the vertical direction in the pants-shaped state of FIG. 1
  • the width direction is the direction along the left-right direction in the pants-shaped state.
  • the central portion in the width direction of the ventral side portion 20 overlaps the one end portion in the longitudinal direction of the absorbent main body 10, and the other end in the longitudinal direction of the absorbent main body 10
  • the central portion of the back side portion 30 in the width direction overlaps the portion.
  • the unfolded diaper 1 is folded in half at a substantially central portion C10 in the longitudinal direction, and both sides of the ventral side portion 20 and the dorsal side portion 30 in the width direction (left-right direction) are joined by welding or the like. It becomes the diaper 1 in the pants type state shown in.
  • the absorber 11 As the absorbent body 10, the absorber 11, the liquid-permeable top sheet (not shown) arranged on the skin side of the absorber 11, and the liquid-impermeable top sheet arranged on the non-skin side of the absorber 11 Can be exemplified with a back sheet (not shown).
  • the absorber 11 absorbs and retains excrement such as urine, and examples thereof include liquid absorbent fibers such as pulp containing a highly absorbent polymer (SAP) formed into a predetermined shape.
  • SAP highly absorbent polymer
  • the ventral portion 20 and the dorsal portion 30 are non-woven fabrics 21 and 31 on the skin side arranged on the skin side in the thickness direction thereof, respectively, and are non-woven fabrics on the skin side 21 and 31. It has non-skin side non-woven fabrics 22 and 32 arranged on the skin side, fit gather elastic members 23 and 33, and cover non-woven fabrics 24 and 34.
  • the skin-side non-woven fabrics 21 and 31 and the non-skin-side non-woven fabrics 22 and 32 are arranged on the non-skin side of the absorbent body 10.
  • the cover non-woven fabrics 24 and 34 are arranged closer to the skin than the absorbent main body 10, and have a shorter longitudinal length (vertical direction) than the skin-side nonwoven fabrics 21 and 31 and the like, and are in the longitudinal direction of the absorbent main body 10. It covers the edge.
  • the skin-side non-woven fabrics 21 and 31, the non-skin-side non-woven fabrics 22 and 32, and the cover non-woven fabrics 24 and 34 are non-woven fabrics having thermoplastic resin fibers.
  • a single fiber of a thermoplastic resin such as polypropylene (PP) or polyethylene (PE) or a composite fiber having a sheath core structure of PP or PE can be exemplified.
  • the plurality of fit gather elastic members 23, 33 are arranged side by side in the vertical direction between the non-skin side non-woven fabrics 21 and 31 and the non-skin side non-woven fabrics 22 and 32, and are attached in a state of being extended in the left-right direction. .. As a result, the ventral side portion 20 and the dorsal side portion 30 are imparted with elasticity along the left-right direction.
  • Examples of the fit gather elastic members 23 and 33 include thread-like rubber and spandex.
  • a plurality of through holes 40 penetrating the non-skin side non-woven fabrics 22 and 32 are formed in the ventral side portion 20 and the dorsal side portion 30 in the thickness direction thereof. That is, the non-skin side non-woven fabrics 22 and 32 in the present embodiment are perforated non-woven fabrics having a plurality of openings. It is assumed that the through holes 40 are formed in the entire non-woven fabrics 22 and 32 on the non-skin side in a predetermined pattern. For example, in diaper 1, as shown in FIG. 2, circular holes are discretely arranged at predetermined intervals in a so-called staggered arrangement.
  • the shape and quantity of the through holes 40 and the arrangement of the through holes 40 are not particularly limited, and are not limited to the example of FIG.
  • the through hole 40 By providing such a through hole 40, good air permeability of the ventral side portion 20 and the dorsal side portion 30 is ensured when the diaper 1 is worn.
  • the through hole 40 may be formed only in either the ventral portion 20 or the dorsal portion 30. Further, the through hole 40 may be formed so as to penetrate both the skin-side non-woven fabrics 21 and 31 and the non-skin-side non-woven fabrics 22 and 32 in the thickness direction.
  • the ventral side portion 20 in the present embodiment has a predetermined shape of the elastic sheet member 2.
  • the sheet member 2 is a sheet-like member in which a plurality of ventral portions 20, 20, ... Are continuous in a predetermined direction (direction corresponding to the left-right direction).
  • the continuous body of the non-woven fabric corresponding to the non-skin side non-woven fabric 22 provided with the plurality of through holes 40, 40 ... Is referred to as the first sheet continuous body 2A.
  • the continuous body of the non-woven fabric corresponding to the skin-side non-woven fabric 21 is referred to as the second sheet continuum 2B.
  • the elastic member in a continuous state corresponding to the fit gather elastic member 23 is referred to as the elastic member 3.
  • FIG. 4 is a schematic side view for explaining the manufacturing apparatus 100 for manufacturing the sheet member 2.
  • FIG. 5 is a flow chart showing a manufacturing process of the sheet member 2.
  • the manufacturing apparatus 100 shown in FIG. 4 continuously manufactures the seat member 2 (ventral portion 20 of the diaper 1) by sequentially performing the steps (S101 to S103) shown in FIG.
  • the manufacturing apparatus 100 includes a transport mechanism 110, a joint region forming mechanism 120, and an elastic member cutting mechanism 130.
  • a transport step of transporting various base materials constituting the sheet member 2 in a predetermined transport direction is performed (S101).
  • the transport direction is the direction along the left-right direction of the diaper 1 (ventral portion 20).
  • the first sheet continuum 2A in which the non-woven fabric 22 on the non-skin side is connected in the transport direction is transported from the upstream side to the downstream side in the transport direction at a predetermined transport speed by the transport mechanism 110 provided with a plurality of transport rollers. Will be done.
  • the second sheet continuum 2B in which the skin-side non-woven fabric 21 is connected in the transport direction is transported from the upstream side to the downstream side in the transport direction at a predetermined transport speed by the transport mechanism 110.
  • the elastic member 3 in which the fit gather elastic members 23 are connected in the transport direction is transported from the upstream side to the downstream side in the transport direction at a predetermined transport speed by the transport mechanism 110.
  • FIG. 4 it is assumed that a plurality of through holes 40, 40 ... Are formed in advance in the non-woven fabric 22 on the non-skin side (first sheet continuum 2A). That is, the first sheet continuum 2A is supplied to the manufacturing apparatus 100 as a perforated non-woven fabric. However, the first sheet continuum 2A may be supplied as a non-perforated non-woven fabric, and a through hole 40 may be formed during the transportation in the transport direction. The method of forming the through hole 40 in this case will be described later.
  • a joining region forming step of forming a plurality of joining regions 50, 50 ... For attaching the elastic member 3 to the first sheet continuum 2A and the second sheet continuum 2B is performed (S102).
  • the first sheet continuum 2A and the second sheet continuum 2B are conveyed so as to be laminated in the thickness direction.
  • the elastic member 3 is arranged between the first sheet continuum 2A and the second sheet continuum 2B in the thickness direction in a state of being extended in the transport direction at a predetermined extension ratio, and is arranged through the joint region 50. Then, it is attached so as to be sandwiched between the first sheet continuum 2A and the second sheet continuum 2B.
  • the bonding region 50 is formed by applying a bonding material such as a hot melt adhesive to each base material transported in the transport direction by the bonding region forming mechanism 120.
  • a bonding material such as a hot melt adhesive
  • the sheet member adhesive coating portion 122 and the elastic member adhesive coating portion 123 are provided as the joint region forming mechanism 120. Then, the sheet member adhesive coating unit 122 applies the bonding material to the opposing surfaces of the first sheet continuous body 2A and the second sheet continuous body 2B being transported, and the elastic member adhesive coating unit 123 is transporting. A bonding material is applied to the surface of the elastic member 3 of the above.
  • FIG. 6 is a schematic plan view showing an example of the arrangement of the joint region 50.
  • the sheet cutting position EC shown by the broken line in FIG. 6 represents a position where the sheet member 2 is cut in a later step (a step of manufacturing the diaper 1 using the sheet member 2). That is, the ventral side portion 20 (diaper 1) is formed by cutting the sheet member 2 at the two sheet cutting positions EC and EC adjacent to each other in the transport direction.
  • the joining region 50 is a region between two sheet cutting positions EC and EC adjacent to each other in the transport direction, and is formed at at least two locations.
  • two bonding regions 50, a first bonding region 501 and a second bonding region 502 are formed between two adjacent sheet cutting positions EC and EC.
  • the second joint region 502 is provided on the downstream side of the first joint region 501 at a predetermined interval in the transport direction, and the elastic member 3 in a state of being extended in the transport direction by these joint regions 50 is the first. It is attached between the 1-seat continuum 2A and the 2nd sheet continuum 2B. As a result, the seat member 2 is provided with elasticity along the transport direction (the left-right direction of the diaper 1).
  • the joint region 50 is formed by arranging a plurality of rectangular joint portions in a direction orthogonal to the transport direction (also referred to as “CD direction”), but the shape and size of the joint region 50 Is not limited to the example of FIG.
  • other junction regions may be provided.
  • an elastic member cutting step is performed in which the elastic member 3 extended in the transport direction is cut between the two joint regions 50 and 50 adjacent to each other in the transport direction (S103).
  • the elastic member is cut by using the elastic member cutting mechanism 130.
  • the elastic member cutting mechanism 130 has a pair of cutter rolls 131 and an anvil roll 132. Both the cutter roll 131 and the anvil roll 132 have a rotation axis along the CD direction and are provided at positions facing each other in the thickness direction of the sheet member 2 (see FIG. 4). Then, only the elastic member 3 is cut by sandwiching the sheet member 2 to be conveyed between the cutter blade provided on the peripheral surface of the cutter roll 131 and the anvil provided on the peripheral surface of the anvil roll 132. ..
  • the elastic member 3 in the extended state is cut at the elastic member cutting position CP between the first joint region 501 and the second joint region 502 adjacent to each other in the transport direction. Then, the cut elastic member 3 contracts upstream from the elastic member cutting position CP toward the first joint region 501 in the transport direction, and at the same time, the cut elastic member 3 contracts in the transport direction from the elastic member cutting position CP toward the second joint region 502. Shrinks to the downstream side of. The action of contracting the cut elastic member 3 in this way is also called "cutback". In FIG. 6, a part of the elastic members 3 and 3 provided is cut back so that the elasticity in the left-right direction (transportation direction) is not exhibited in a predetermined region of the sheet member 2. ..
  • This region is a region that is overlapped and joined with the absorbent main body 10 in the manufacturing process of the diaper 1, and by weakening the elasticity in the left-right direction in the region, the absorbent main body 10 contracts in the left-right direction. It is possible to prevent excrement such as urine from leaking.
  • the cutting position CP represents the position where the elastic member 3 in the extended state is first cut.
  • the position where the elastic member 3 is first cut is referred to as the cutting position CP among the plurality of places. To do.
  • the cutting position CP is provided at the same position in the transport direction (left-right direction). That is, FIG. 6 shows an example in which each of the plurality of elastic members 3, 3 ... Provided at intervals in the CD direction (vertical direction) is cut at the same position in the transport direction.
  • the cutting position CP in the transport direction may be different for each of the plurality of elastic members 3, 3 ...
  • the marks of cutting the elastic members 3 become less noticeable on the ventral side 20 (non-woven fabric 22 on the non-skin side) of the diaper 1, and the appearance of the diaper 1 is improved. Can be improved.
  • the sheet member 2 having elasticity in the left-right direction is manufactured.
  • various steps for manufacturing the diaper 1 are performed on the downstream side of the manufacturing apparatus 100 in the transport direction.
  • the step of joining the absorbent body 10 to the seat member 2 (ventral portion 20 and dorsal side portion 30)
  • it is folded in half at a predetermined position in the CD direction (the above-mentioned substantially central portion C10 in the longitudinal direction).
  • the sheet members 2 and 2 stacked in the thickness direction correspond to predetermined positions in the transport direction (ventral side 20 and dorsal side 30 on both sides in the left-right direction).
  • the step of joining at the seat cutting position EC, the step of cutting the sheet member 2 at the sheet cutting position EC, and the like are performed.
  • the pants-type diaper 1 as shown in FIG. 1 is manufactured.
  • FIG. 7A shows the perforated non-woven fabric NW1 (corresponding to the first sheet continuum 2A) and the non-woven fabric NW2 (corresponding to the second sheet continuum 2B) laminated in the thickness direction, and the thread rubber S (elasticity) provided between them.
  • a cross section of the state of (corresponding to member 3) viewed from the CD direction is shown.
  • the rubber thread S is arranged in a state of being extended in the transport direction.
  • the perforated nonwoven fabric NW1 is provided with a through hole h.
  • a protruding portion hp protruding to one side in the thickness direction is formed in the vicinity of the outer edge portion of the through hole h.
  • This protruding portion hp is a so-called “burr” and is conventionally formed naturally when forming a through hole in a non-woven fabric.
  • the rubber thread S When the thread rubber S is cut and contracts (cuts back) in the transport direction from the state of FIG. 7A, when the thread rubber S contracts, the surface is caught by the protruding portion hp formed at the outer edge of the through hole h, and FIG. As shown in 7B, the rubber thread S may be deformed into an ⁇ shape from the through hole h and protrude to the outside of the perforated non-woven fabric NW1. That is, the thread rubber S may protrude from one side in the thickness direction of the perforated non-woven fabric NW1 to the other side. The stronger the contraction force of the rubber thread S, the greater the impact when it is caught on the protruding portion hp, and the rubber thread S tends to pop out from the through hole h.
  • the elastic member 3 when the elastic member 3 is cut back in the elastic member cutting step (S103) described above when the sheet member 2 is manufactured, the through hole 40 of the non-woven fabric 22 on the non-skin side is used.
  • the elastic member 3 can be made difficult to pop out. Specifically, when the elastic member 3 is cut between two joint regions 50 and 50 adjacent to each other in the transport direction, the elastic member 3 is provided on the upstream side in the transport direction with respect to the joint region 50 provided on the downstream side in the transport direction. The elastic member 3 is cut at a position close to the joint region 50.
  • FIG. 8 is a diagram illustrating a state of cutback when the elastic member 3 is cut at a position close to the joint region 50 (first joint region 501) provided on the upstream side in the transport direction.
  • FIG. 9 is a diagram illustrating a state of cutback when the elastic member 3 is cut at a position close to the joint region 50 (second joint region 502) provided on the downstream side in the transport direction.
  • the first junction region 501 and the second junction region 502 are arranged so as to be adjacent to each other from the upstream side to the downstream side in the transport direction. Then, the intermediate position between the first joint region 501 and the second joint region 502 in the transport direction is set to C50. Further, it is assumed that the sheet member 2 is transported from the upstream side to the downstream side in the transport direction at a predetermined speed V1.
  • the elastic member 3 is cut on the upstream side of the intermediate position C50 in the transport direction. That is, in the transport direction, the distance between the cut position CP of the elastic member 3 and the first joint region 501 is shorter than the distance between the cut position CP of the elastic member 3 and the second joint region 502. Therefore, as shown by the arrow in FIG. 8, the contraction speed V31 from the cutting position CP toward the upstream side in the transport direction (first joint region 501) is such that the contraction speed V31 is on the downstream side in the transport direction (second joint) from the cutting position CP. It becomes smaller than the contraction speed V32 toward the region 502).
  • the elastic member 3 is cut on the downstream side of the intermediate position C50 in the transport direction. That is, in the transport direction, the distance between the cut position CP of the elastic member 3 and the first joint region 501 is longer than the distance between the cut position CP of the elastic member 3 and the second joint region 502. Therefore, as shown by the arrow in FIG. 9, the shrinkage speed V33 from the cutting position CP toward the upstream side in the transport direction (first joint region 501) is such that the contraction speed V33 is on the downstream side in the transport direction (second joint) from the cutting position CP. It becomes larger than the contraction speed V34 toward the region 502).
  • the contraction force of the elastic member 3 on the downstream side in the transport direction is relatively smaller than the contraction force on the upstream side in the transport direction (WD1> WD2, WD3> WD4). .. Therefore, if it is possible to prevent the elastic member 3 from jumping out of the through hole 40 on the upstream side in the transport direction, it is unlikely that the elastic member 3 will pop out from the through hole 40 on the downstream side in the transport direction.
  • an adhesive may be provided between the first joint region 501 and the second joint region of the sheet member 2.
  • an adhesive may be applied so as to have an adhesive force capable of cutting back the elastic member 3 between the first joint region 501 and the second joint region. If the elastic member 3 is lightly fixed to the sheet member 2 by such an adhesive, when the elastic member 3 cuts back (shrinks) in the transport direction, the elastic member 3 is in the CD direction or other. It becomes difficult to shake in the direction. That is, since the adhesive functions like a steady rest, the contraction operation of the elastic member 3 is likely to be stable, and the adhesive is less likely to be caught by the outer edge portion 40e of the through hole 40. This makes it easier to prevent the elastic member 3 from jumping out of the through hole 40.
  • FIG. 10 is a schematic cross-sectional view of the seat member 2 in the present embodiment, which corresponds to FIG. 7.
  • the outer edge portion 40e of the through hole 40 hardly protrudes in the thickness direction.
  • the protruding height h40e at which the outer edge portion 40e protrudes in the thickness direction is equal to or less than a predetermined position. That is, a large protrusion (burr) is not formed on the outer edge portion 40e.
  • burr a large protrusion
  • the elastic member 3 contracts, it is difficult to get caught in the outer edge portion 40e of the through hole 40. Therefore, it is suppressed that the elastic member 3 protrudes from the through hole 40 to the outside (from one side in the thickness direction to the other side) of the first sheet continuum 2A (non-woven fabric 22 on the non-skin side).
  • 11A to 11C are schematic explanatory views for explaining a conventional method for forming a perforated nonwoven fabric.
  • 12A to 12C are schematic explanatory views for explaining the method of forming the perforated nonwoven fabric of the present embodiment.
  • the non-woven fabric is sandwiched from both sides in the thickness direction by a needle-shaped pin portion for making a hole in the non-woven fabric and a groove portion into which the pin portion is inserted.
  • the method was common.
  • a pin portion 141 and a pin support base portion 142 for supporting the pin portion are provided on the upper side in the thickness direction of the nonwoven fabric, and a substantially trapezoidal groove portion 145 is provided on the lower side in the thickness direction of the nonwoven fabric.
  • the pin portion 141 is heated to a predetermined temperature, or the heated air is pumped from the blower blower connected to the groove portion 145.
  • the pin portion 141 forms an opening in the non-woven fabric.
  • an opening is formed in the portion where the tip portion of the pin portion 141 abuts, but the fiber is compressed in the portion sandwiched between the pin support base portion 142 and the groove portion 145, and the outer edge portion of the opening is formed.
  • a protruding portion (burr) protruding downward in the thickness direction is formed.
  • the pin portion 143 made of a needle or the like having a uniform thickness (diameter) and the groove portion 146 into which the pin portion 143 is inserted are substantially the same size as the diameter of the pin portion 143.
  • a through hole 40 is formed by sandwiching the non-woven fabric from both sides in the thickness direction with the tubular groove portion 146 having a diameter of sword.
  • the pin portion 143 is provided on the upper side in the thickness direction of the first sheet continuous body 2A (non-woven fabric 22 on the non-skin side), and the groove portion 146 is provided on the lower side in the thickness direction of the first sheet continuous body 2A. (See FIG.
  • the through hole 40 is formed by moving the pin portion 143 downward and inserting it into the groove portion 146 (see FIG. 12B).
  • the first sheet continuum 2A is the upper end edge of the groove portion 146 and the pin portion 143.
  • the through hole 40 is formed so that the fibers of the non-woven fabric are cut when sandwiched between the two. That is, when the pin portion 143 is inserted into the groove portion 146, the outer edge portion of the through hole 40 is unlikely to be compressed in the thickness direction.
  • the maximum value of the height h40e at which the outer edge portion 40e protrudes in the thickness direction as shown in FIG. 10 was 0.2 mm. That is, the outer edge portion 40e of the through hole 40 formed in the first sheet continuum 2A (non-woven fabric 22 on the non-skin side) in the present embodiment has a protrusion height h40e in the thickness direction suppressed to 0.2 mm or less. (H40e ⁇ 0.2 mm). When the protrusion height h40e is 0.2 mm or less, it is possible to effectively prevent the elastic member 3 from jumping out of the through hole 40 as described with reference to FIG. 7.
  • the size of the diameter D40 of the through hole 40 it is possible to prevent the elastic member 3 from jumping out of the through hole 40.
  • the magnitude relationship between the diameter D40 of the through hole 40 and the diameter d3 of the elastic member 3 within a predetermined range, it is possible to easily suppress the protrusion of the elastic member 3. Specifically, when the elastic member 3 pops out of the through hole 40, the elastic member 3 in the middle of cutting back pops out of the through hole 40 while being deformed into an ⁇ shape as shown in FIG. 7B.
  • the diameter D40 of the through hole 40 is smaller than the diameter 2 ⁇ d3 of two elastic members 3 (D40 ⁇ 2 ⁇ d3), the ⁇ -shaped elastic member 3 passes through the through hole 40. This is less likely to occur, so that the elastic member 3 can be prevented from popping out with high accuracy.
  • the through hole 40 is not always formed in a perfect circle, and may be formed in an elliptical shape or the like.
  • the sizes of the plurality of through holes 40, 40 ... May be different.
  • the diameter D40 is the average value of the diameters of the through holes 40.
  • the diameter d3 of the elastic member 3 represents the diameter of the elastic member 3 in the natural state (non-extended state).
  • the through hole 40 has a function as a ventilation hole of the diaper 1, it is desirable that the diameter D40 of the through hole 40 is as large as possible in order to maintain the air permeability.
  • the occurrence rate of protrusion of the elastic member 3 is 20% or more. there were.
  • the "occurrence rate of popping out of the elastic member 3" represents the ratio of the number of the elastic member 3 in which the popping out of the elastic member 3 is visually recognized when 100 ventral side portions 20 (diapers 1) are manufactured.
  • the user who purchased the package is anxious. There is a risk.
  • the occurrence rate of protrusion of the elastic member 3 was 1% or less. In this case, it is unlikely that the diaper 1 in which the elastic member 3 is protruding is included in the package in which about 10 to 20 diapers 1 are packaged, and it is possible to prevent the user from being anxious. ..
  • the elastic member can be inserted from the through hole 40 while ensuring good air permeability. It is possible to provide a diaper 1 in which 3 is hard to pop out.
  • the diameter D40 of the through hole 40 may be different between one side and the other side in the thickness direction. Specifically, it is preferable that the diameter D40B on the other side (non-skin side) in the thickness direction is larger than the diameter D40A on one side (skin side) in the thickness direction (D40A ⁇ D40B).
  • FIG. 13 is a schematic cross-sectional view showing a case where the diameter of the through hole 40 is different between one side and the other side in the thickness direction.
  • the through hole 40 visible on the surface of the non-skin surface becomes more conspicuous in the waist circumference 20 of the diaper 1. .. Therefore, it is possible to make it easier for the user to recognize that the waist circumference portion 20 has good air permeability.
  • the pin portion 143 described with reference to FIG. 12 is heated to open the hole under a predetermined temperature condition. Is desirable.
  • the temperature of the heated pin portion 143 is preferably equal to or higher than the softening point of the thermoplastic resin fiber contained in the first sheet continuum 2A and lower than the melting point of the thermoplastic resin fiber.
  • the temperature is set so that the thermoplastic resin fiber does not cure. By setting the temperature so that the thermoplastic resin fibers do not harden, it is possible to reduce the possibility that the non-woven fabric becomes hard at the outer edge portion 40e of the through hole 40.
  • the softening point can be measured according to JIS K7196 (a softening temperature test method by thermomechanical analysis of a thermoplastic plastic film and a sheet).
  • the pin portion 143 can be pushed in and pulled out while heating the first sheet continuum 2A, so that the pin portion 143 can be easily inserted into the first sheet continuum 2A softened by heating and formed. It becomes easy to maintain the open shape of the through hole 40.
  • the temperature of the pin portion 143 is closer to the softening point than the melting point of the thermoplastic resin fiber contained in the first sheet continuum 2A. That is, it is desirable that the heating temperature of the pin portion 143 be as low as possible within the temperature range between the melting point and the softening point of the thermoplastic resin fiber.
  • the pin portion 143 is heated to about 120 ° C. to 135 ° C. to form the through hole 40.
  • the proportion of the portion where the thermoplastic fiber is not melted in the outer edge portion 40e is larger than the proportion of the portion where the thermoplastic fiber is melted. Since the flexibility of the fiber is easily maintained and the rigidity is difficult to increase in the portion where the thermoplastic fiber is not melted, the higher the ratio of the non-melted portion, the lower the rigidity in the outer edge portion 40e of the through hole 40. Therefore, when the elastic member 3 is cut back, it is difficult for the elastic member 3 to be caught in the outer edge portion 40e, and the elastic member 3 is less likely to pop out from the through hole 40. Further, since the flexibility of the non-skin side non-woven fabric 22 in the region where the through hole 40 is formed is easily maintained, it is possible to realize a good touch of the diaper 1.
  • the tape-type disposable diaper 5 (hereinafter, also referred to as “diaper 5”) will be described as an absorbent article.
  • FIG. 14 is a plan view of the diaper 5 of the second embodiment in the expanded and extended state.
  • FIG. 15 is a cross-sectional view taken along the line BB shown in FIG.
  • the diaper 5 has a vertical direction and a horizontal direction orthogonal to each other, and has a dorsal waist circumference area 5A, an inseam area 5B, and a ventral waist circumference area 5C arranged in the vertical direction.
  • the vertical direction of the diaper 5 is a direction corresponding to the vertical direction (longitudinal direction) of the diaper 1
  • the horizontal direction of the diaper 5 is a direction corresponding to the horizontal direction (width direction) of the diaper 1.
  • the direction in which the materials constituting the diaper 5 are laminated is referred to as the thickness direction. In the thickness direction, the side in contact with the wearer is called the skin side, and the opposite side is called the non-skin side.
  • the diaper 5 includes an absorber 11 that absorbs excrement, a liquid-permeable skin-side sheet 12 located on the skin side of the absorber 11, and the absorber 11 and the skin side.
  • the liquid-permeable intermediate sheet 13 located between the sheets 12, the liquid-impermeable leak-proof sheet 14 located on the non-skin side of the absorber 11, and the liquid-impermeable sheet 14 located on the non-skin side of the leak-proof sheet 14. It has an exterior sheet 15 and a pair of side sheets 16 provided on both sides of the skin side sheet 12 in the lateral direction. Further, a pair of fastening tapes 17 extend from the dorsal waist circumference area 5A to both outer sides in the lateral direction.
  • elastic members around the legs for example, rubber threads
  • the diaper 5 fits around the legs of the wearer.
  • a pair of leak-proof wall portions 18 standing upright on the skin side are provided on both side portions of the absorber 11 in the lateral direction.
  • the structure of the absorber 11 in the diaper 5 is substantially the same as that of the absorber 11 of the first embodiment.
  • a plurality of crotch gather elastic members 35 such as rubber threads are attached between the leak-proof sheet 14 and the exterior sheet 15 in the thickness direction in a state of being extended along the vertical direction. Due to the elasticity developed by the crotch gather elastic member 35, a force that presses the absorber 11 from the non-skin side to the skin side acts on the inseam of the wearer when the diaper 5 is worn. As a result, the absorber 11 easily adheres to the wearer's skin in the inseam, the fit of the inseam is improved, and the leakage of excrement is easily suppressed.
  • the exterior sheet 15 is a perforated non-woven fabric equivalent to the non-woven fabric 22 on the non-skin side of the first embodiment, and the exterior sheet 15 penetrates the surface thereof in the thickness direction.
  • a plurality of through holes 40 are formed.
  • the through hole 40 provided in the exterior sheet 15 of the second embodiment has substantially the same configuration as the through hole 40 of the first embodiment.
  • the sheet member 6 is a sheet-like member in which a plurality of leakage-proof sheets 14 and exterior sheets 15 are continuous in a predetermined direction (direction corresponding to the vertical direction in FIG. 14).
  • the continuous body of the non-woven fabric corresponding to the exterior sheet 15 provided with the plurality of through holes 40, 40 ... Is referred to as the first sheet continuous body 6A.
  • the continuous body of the liquid-impermeable sheet corresponding to the leak-proof sheet 14 is referred to as the second sheet continuous body 6B
  • the continuous elastic member corresponding to the crotch gather elastic member 35 is referred to as the elastic member 7.
  • FIG. 16 is a schematic side view for explaining the manufacturing apparatus 200 for manufacturing the seat member 6.
  • the basic configuration of the manufacturing apparatus 200 is substantially the same as that of the manufacturing apparatus 100 of the first embodiment, and includes a transport mechanism 210, a joint region forming mechanism 220, and an elastic member cutting mechanism 230. Then, the sheet member 6 is manufactured by carrying out each step (S101 to S103) similar to the manufacturing step of the sheet member 2 by using the manufacturing apparatus 200 (see FIG. 5).
  • the first sheet continuum 6A is conveyed from the upstream side to the downstream side in the transfer direction at a predetermined transfer speed by the transfer mechanism 210 provided with a plurality of transfer rollers.
  • the transport direction is the direction along the vertical direction of the diaper 5.
  • the second sheet continuum 6B and the elastic member 7 are transported from the upstream side to the downstream side in the transport direction at a predetermined transport speed by the transport mechanism 210.
  • the elastic member 7 is attached so as to be laminated in the thickness direction.
  • the elastic member 7 is arranged between the first sheet continuum 6A and the second sheet continuum 6B in the thickness direction in a state of being extended in the transport direction at a predetermined extension ratio, and is arranged through the joint region 50.
  • it is attached so as to be sandwiched between the first sheet continuum 6A and the second sheet continuum 6B.
  • the method of forming the joint region 50 is substantially the same as that of the first embodiment.
  • FIG. 17 is a schematic plan view showing an example of the arrangement of the joint region 50.
  • the sheet cutting position EC shown by the broken line in FIG. 17 represents a position where the sheet member 6 is cut in a later step (a step of manufacturing the diaper 5 using the sheet member 6).
  • one or more joint regions 50 are formed on both sides of the sheet cutting position EC in the transport direction.
  • the first joint region 511 is formed on the upstream side in the transport direction and the second joint region 512 is formed on the downstream side in the transport direction across the sheet cutting position EC.
  • the elastic member 7 in a state of being extended along the transport direction is attached between the first sheet continuum 6A and the second sheet continuum 6B by these joining regions 50.
  • an adhesive may be provided between the first joint region 511 and the second joint region 512 in the transport direction.
  • an elastic member cutting step is performed in which the elastic member 7 extended in the transport direction is cut between the two joint regions 50 and 50 adjacent to each other in the transport direction (S103).
  • the elastic member is cut by using the elastic member cutting mechanism 230 provided with the pair of cutter rolls 231 and the anvil roll 232.
  • the stretched elastic member 7 is cut at the elastic member cutting position CP between the first joint region 511 and the second joint region 512 adjacent to each other in the transport direction.
  • the cut elastic member 7 is cut back from the elastic member cutting position CP to the upstream side and the downstream side in the transport direction, respectively, and in the region between the first joint region 511 and the second joint region 512, the elastic member 7 is used.
  • Elasticity does not develop. That is, elasticity is imparted only to a part of the inseam area 5B of the diaper 5.
  • the elastic member 7 that cuts back (shrinks) becomes the first sheet continuum 6A by appropriately adjusting the elastic member cutting position CP as in the first embodiment. It is possible to prevent it from popping out from the provided through hole 40.
  • the elastic member 7 is cut at a position closer to the first joint region 511 than the second joint region 512 in the transport direction. In the case of FIG. 17, assuming that the intermediate position between the first joint region 511 and the second joint region 512 in the transport direction is C51, it is desirable that the elastic member cutting position CP has the intermediate position on the upstream side in the transport direction from C51. ..
  • the amount of contraction of the elastic member 7 per unit time can be made relatively small. That is, with respect to the sheet member 6 transported in the transport direction at a predetermined transport speed V2, the elastic member 7 cut at the elastic member cutting position CP contracts in the transport direction downstream of the speed V72 in the transport direction. The speed V71 that contracts to the upstream side can be reduced. Therefore, the contraction force of the elastic member 7 can be reduced as a whole. As a result, when the elastic member 7 cuts back, it becomes difficult to get caught in the outer edge portion 40e of the through hole 40, and it becomes easy to prevent the elastic member 7 from popping out from the through hole 40.
  • the portion where the elasticity of the elastic member 7 (crotch gather elastic member 35) acts in the transport direction is also referred to as an "effective length portion" of the elastic member.
  • the distance d35f between the ventral end of the diaper 5 and the ventral end of the effective length portion of the crotch gather elastic member 35 is the dorsal end of the diaper 5.
  • the distance between the crotch gather elastic member 35 and the dorsal end of the effective length portion is larger than the distance d35b. That is, the effective length portion of the crotch gather elastic member 35 is provided closer to the dorsal side than the center in the vertical direction of the diaper 5.
  • the absorber 11 easily fits the wearer's body on the buttocks side, and it is easy to suppress excretion leakage. Further, with such a configuration, the contractile force of the elastic member 7 can be suppressed to a small value by cutting the elastic member 7 (crotch gather elastic member 35) within the dorsal waist circumference region 5A (see FIG. 17). it can. Therefore, the position of the elastic member cutting position CP can be easily adjusted, and the diaper 5 in which the crotch gather elastic member 35 does not easily pop out from the through hole 40 can be easily realized.
  • the bonding region 50 is formed by using an adhesive means such as a hot melt adhesive, but the method for forming the bonding region 50 is not limited to this.
  • the bonding region 50 may be formed by using a welding means such as ultrasonic welding. Since ultrasonic welding is a known technique, the description of ultrasonic welding will be omitted in the present specification.
  • FIG. 18 is a schematic plan view illustrating a modified example of the joint region 50.
  • FIG. 18 is a modified view of the joint region described with reference to FIG. 6 of the first embodiment.
  • the welding region 50 is formed by a plurality of welding portions 52, 52 discretely arranged in the transport direction and the direction orthogonal to the transport direction (CD direction).
  • Each welded portion 52 is formed into a substantially rectangular shape by ultrasonic welding, and the first sheet continuum 2A and the second sheet continuum 2B are joined in the thickness direction, and a pair of welds adjacent to each other in the CD direction are welded.
  • the elastic member 3 is attached to the seat member 2 by sandwiching the elastic member 3 from both sides in the CD direction by the portion pair 52S.
  • FIG. 19A and 19B are explanatory views of the attachment function of the elastic member 3 by the welded portion pair 52S, and are schematic enlarged views of the C portion in FIG.
  • the pair of welded portions 52, 52 forming the welded portion vs. 52S are arranged at intervals of GH50 in the CD direction.
  • the size of the interval GH50 is set to the same size as or slightly larger than the diameter d3t of the elastic member 3 stretched to a predetermined extension ratio (GH50 ⁇ d3t). That is, the elastic member 3 in the extended state is arranged between the welded portion and the 52S in the CD direction.
  • the elastic member 3 contracts in the transport direction and expands in the CD direction, and the diameter d3 in the natural state is the CD of the welded portion vs. 52S.
  • the directional spacing is greater than GH50 (d3> GH50).
  • the elastic member 3 is sandwiched between the welded portions 52 and 52 in the CD direction.
  • the elastic member 3 is attached to the seat member 2.
  • the fit gather elastic member 32 (elastic member 3) is in a natural state relaxed from the above-mentioned stretched state. Further, in the pants-shaped diaper 1, since both left and right sides of the ventral side 20 (dorsal side 30) are joined by welding or the like, the ventral side 20 is extended in the left-right direction when the diaper 1 is worn. Even so, the fit gather elastic member 32 does not come off from the ventral portion 20.
  • 1 diaper (first embodiment) (pants-type disposable diaper, absorbent article), 2 sheet member (first embodiment), 2A 1st sheet continuum (non-woven fabric on non-skin side), 2B 2nd sheet continuum (nonwoven fabric on the skin side), 3 Elastic member (fit gather elastic member), 5 Diapers (second embodiment) (tape-type disposable diapers, absorbent articles), 6 Seat member (second embodiment), 6A 1st sheet continuum (exterior sheet), 6B 2nd sheet continuum (liquid impermeable sheet), 7 Elastic member (crotch gather elastic member), 10 Absorbent body, 11 Absorbent, 12 Skin side sheet, 13 Intermediate sheet, 14 Leakage-proof sheet, 15 exterior sheet, 16 side sheet, 17 fastening tape, 18 leak-proof wall, 20 ventral, 21 Non-woven fabric on the skin side, 22 Non-woven fabric on the non-skin side, 23 Fit gather elastic member, 24 cover non-woven fabric, 30 dorsal part, 31 Non-woven fabric on the skin side, 32 Non-woven fabric on the non

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  • Absorbent Articles And Supports Therefor (AREA)

Abstract

La présente invention comprend : une étape de transport (S101) pour transporter chacun d'un premier corps continu de feuille (2A) et d'un second corps continu de feuille (2B) qui sont dotés d'une pluralité de trous traversants (40) ; une étape de formation de région de liaison (S102) dans laquelle une pluralité de régions de liaison (50) pour fixer un élément élastique (3) qui est allongé dans la direction de transport du premier corps continu de feuille (2A) ou du second corps continu de feuille (2B) sont formées entre le premier corps continu de feuille (2A) et le second corps continu de feuille (2B) stratifié sur un côté dans la direction de l'épaisseur du premier corps continu de feuille (2A) ; et une étape de coupe d'élément élastique (S103) dans laquelle l'élément élastique allongé (3) est coupé entre les deux régions de liaison (50) adjacentes l'une par rapport à l'autre dans la direction de transport, et l'élément élastique coupé (3) est contracté le long de la direction de transport de telle sorte que l'élément élastique ne fait pas saillie hors des trous traversants (40) vers l'autre côté dans la direction de l'épaisseur du premier corps continu de feuille (2A).
PCT/JP2020/027844 2019-07-31 2020-07-17 Procédé de fabrication d'élément de feuille pour article absorbant, et article absorbant Ceased WO2021020171A1 (fr)

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JP7692382B2 (ja) 2022-03-16 2025-06-13 大王製紙株式会社 パンツタイプ使い捨て着用物品
KR102739514B1 (ko) * 2022-11-01 2024-12-06 주식회사 지이엔아이 유린백 제조장치

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JPS6329640A (ja) * 1986-05-22 1988-02-08 チコピ− 穴あきフイルム表面層材及びその製造方法
JP2004105376A (ja) * 2002-09-17 2004-04-08 Daio Paper Corp 吸収性物品及び吸収性物品の製造方法
JP2016087327A (ja) * 2014-11-11 2016-05-23 ユニ・チャーム株式会社 吸収性物品に係るシート状部材の製造方法、及び製造装置
JP2017014657A (ja) * 2015-06-30 2017-01-19 ユニ・チャーム株式会社 吸収性物品の液透過性表面シート用不織布の製造方法
JP2017136476A (ja) * 2017-05-19 2017-08-10 大王製紙株式会社 パンツタイプ使い捨ておむつ
JP2018068464A (ja) * 2016-10-26 2018-05-10 王子ホールディングス株式会社 テープ型使い捨ておむつ
WO2018167836A1 (fr) * 2017-03-14 2018-09-20 ユニ・チャーム株式会社 Procédé de production et dispositif de production pour élément en feuille utilisé dans des articles absorbants
WO2018235211A1 (fr) * 2017-06-21 2018-12-27 花王株式会社 Article absorbant

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JPS6329640A (ja) * 1986-05-22 1988-02-08 チコピ− 穴あきフイルム表面層材及びその製造方法
JP2004105376A (ja) * 2002-09-17 2004-04-08 Daio Paper Corp 吸収性物品及び吸収性物品の製造方法
JP2016087327A (ja) * 2014-11-11 2016-05-23 ユニ・チャーム株式会社 吸収性物品に係るシート状部材の製造方法、及び製造装置
JP2017014657A (ja) * 2015-06-30 2017-01-19 ユニ・チャーム株式会社 吸収性物品の液透過性表面シート用不織布の製造方法
JP2018068464A (ja) * 2016-10-26 2018-05-10 王子ホールディングス株式会社 テープ型使い捨ておむつ
WO2018167836A1 (fr) * 2017-03-14 2018-09-20 ユニ・チャーム株式会社 Procédé de production et dispositif de production pour élément en feuille utilisé dans des articles absorbants
JP2017136476A (ja) * 2017-05-19 2017-08-10 大王製紙株式会社 パンツタイプ使い捨ておむつ
WO2018235211A1 (fr) * 2017-06-21 2018-12-27 花王株式会社 Article absorbant

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