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WO2014204015A1 - Couche jetable - Google Patents

Couche jetable Download PDF

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Publication number
WO2014204015A1
WO2014204015A1 PCT/JP2014/067217 JP2014067217W WO2014204015A1 WO 2014204015 A1 WO2014204015 A1 WO 2014204015A1 JP 2014067217 W JP2014067217 W JP 2014067217W WO 2014204015 A1 WO2014204015 A1 WO 2014204015A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
skin
disposable diaper
width direction
absorbent body
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/JP2014/067217
Other languages
English (en)
Japanese (ja)
Inventor
湊　大尚
坂口　智
島田　孝明
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
Publication of WO2014204015A1 publication Critical patent/WO2014204015A1/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
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53743—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the position of the layer relative to the other 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
    • A61F13/45—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
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49017—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means being located at the crotch region
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer

Definitions

  • the present invention relates to a disposable diaper.
  • Patent Document 1 is a fiber sheet that is disposed on the skin-facing surface of an absorbent article, on one surface side, a large number of convex portions, a connecting portion that connects the convex portions, and the convex portions.
  • a sheet which is provided with a concave portion disposed so as to avoid the connecting portion therebetween and has a undulating surface shape.
  • seat has a softness
  • a wearing assistant such as a mother seeks a touch that can be worn safely on infants.
  • a wearing assistant such as a mother only checks the flexibility and cushioning properties by touching only the skin sheet located on the skin facing surface side of the absorbent body.
  • fingers of both the non-skin sheet and the skin sheet located on the skin-facing surface side of the absorbent body were touched to confirm the feel of both sides of the disposable diaper.
  • the present invention has been made in view of the above-described problems, and improves the touch of the skin sheet of the disposable diaper, gives a softer impression to a wearing assistant such as a mother, and the wearing assistant
  • An object is to provide a disposable diaper that can be safely worn by a wearer.
  • the disposable diaper according to the present disclosure has a front waistline region (front waistline region 20), a rear waistline region (rear waistline region 30), and an inseam located between the front waistline region and the rear waistline region.
  • An absorbent body (absorbent body 40) extending across at least one of the front waistline area and the rear waistline area, and a skin facing surface side of the absorbent body.
  • the gist is that the cro
  • FIG. 1 It is an expanded top view of the disposable diaper concerning this embodiment. It is sectional drawing of the disposable diaper along the F1-F1 line
  • FIG. 1 is a developed plan view of a disposable diaper 10 according to this embodiment.
  • FIG. 2 is a cross-sectional view of the disposable diaper 10 taken along line F1-F1 shown in FIG.
  • FIG. 3 is a cross-sectional view of the disposable diaper 10 taken along the line F2-F2 shown in FIG.
  • the developed plan view shown in FIG. 1 shows the elastic members 83 of the leg stretchable part 75 and the leg side stretchable part 80 until the top sheet 50 as a skin sheet constituting the disposable diaper, the side flap 70 and the like are not formed. It is a figure of the extended state.
  • the disposable diaper 10 has a front waistline region 20, a crotch region 25, and a back waistline region 30.
  • the front waistline region 20 is a portion in contact with the wearer's front waistline portion (abdomen portion).
  • the rear waistline region 30 is a portion in contact with the rear waistline portion (back portion) of the wearer.
  • the crotch region 25 is located between the front waistline region 20 and the back waistline region 30.
  • the disposable diaper 10 is formed with a pair of leg-hole openings 35.
  • the leg opening 35 is provided at the outer edge of the disposable diaper in the product width direction, and is a portion arranged along the wearer's leg in a state where the disposable diaper is worn by the wearer.
  • the outer edge is an outer end in the product width direction
  • the inner edge is an inner end in the product width direction.
  • the outer end edge is an outer end in the product longitudinal direction
  • the inner end edge is an inner end in the product longitudinal direction.
  • the direction from the front waistline region 20 to the rear waistline region 30 is referred to as a product longitudinal direction L
  • a direction orthogonal to the product longitudinal direction L is referred to as a product width direction W.
  • the disposable diaper 10 includes an absorber 40 that straddles the crotch region 25 and extends to the front waistline region 20 and the rear waistline region 30.
  • the absorber 40 is constituted by an absorbent core 40a and a covering sheet 40b.
  • the absorbent core 40a can be made of the same material as that of a conventional disposable diaper, and can be appropriately formed using a known member or material such as pulverized pulp or a superabsorbent polymer.
  • the absorbent core 40a is wrapped with a sheet-like covering sheet 40b.
  • the covering sheet 40b is a sheet that covers the absorbent core 40a. At least a part on the skin surface side of the covering sheet 40b is constituted by various fiber nonwoven fabrics or tissue sheets having liquid permeability.
  • the covering sheet 40b covers the skin contact surface of the absorbent core and is folded to the non-skin contact surface side along the outer edge of the absorbent core.
  • the covering sheet 40b is laminated on the non-skin facing surface side of the absorbent body as shown in FIG.
  • FIG. 4 is a diagram showing the absorber.
  • Fig.4 (a) is the top view visually recognized from the skin opposing surface side of an absorber
  • FIG.4 (b) is the rear view visually recognized from the non-skin opposing surface side of the absorber.
  • the squeezed portion is compressed from the skin-facing surface of the absorbent body toward the non-skin-facing surface
  • the first compressed portion 41 is compressed from the non-skin-facing surface of the absorbent body toward the skin-facing surface.
  • a linear second pressing portion 42 extending along at least one of the longitudinal direction and the product width direction.
  • the pressing part is formed from above the covering sheet with the absorbent core covered by the covering sheet.
  • the pressing part may be formed only in the absorptive core.
  • the 1st pressing part 41 is formed in the skin opposing surface of an absorber.
  • the 1st pressing part is arrange
  • the 1st pressing part should just be arrange
  • the short linear shape is a linear shape having a length of 10 mm or less.
  • the 1st pressing part 41 and the 2nd pressing part 42 are formed in the non-skin opposing surface of an absorber.
  • the second pressing part 42 includes a first part 42A extending in a first inclination direction intersecting the product longitudinal direction and the product width direction, a second part intersecting the first inclination direction and intersecting the product longitudinal direction and the product width direction. And a second portion 42B extending in the tilt direction.
  • the first part and the second part are alternately arranged along the product longitudinal direction, and are alternately formed at intervals in the product width direction.
  • the length of the first part in the product longitudinal direction is longer than the length of the first part in the product width direction
  • the length of the second part in the product longitudinal direction is longer than the length of the first part in the product width direction.
  • no pressing part is formed in the region between the first part 42A and the second part 42B that are adjacent in the product width direction.
  • the area surrounded by the first part 42A and the second part 42B has a rhombus shape in plan view, and the first pressing part 41 is formed in the area.
  • only the 2nd pressing part 42 may be formed in the non-skin opposing surface of an absorber.
  • a liquid-permeable top sheet 50 is provided on the skin-facing surface side of the absorber 40.
  • the top sheet 50 is formed of a liquid-permeable sheet such as a hydrophilic nonwoven fabric or woven fabric, an apertured plastic film, or an apertured hydrophobic nonwoven fabric.
  • a back sheet 60a as a non-skin surface sheet and an exterior sheet 60 are provided on the back surface side (non-skin facing surface side) of the absorber 40.
  • the back sheet 60a has liquid impermeability and functions as a leak-proof sheet.
  • An auxiliary sheet 55 is provided between the absorber 40 and the top sheet 50.
  • the auxiliary sheet is disposed so as to cover a part of the absorber 40.
  • the front end edge 55F and the rear end edge 55R of the auxiliary sheet 55 are located on the outer side in the product longitudinal direction from the first notch 115 and the second notch 125 described later. More specifically, the front end edge 55F of the auxiliary seat 55 is positioned in front of the first cutout 115, and the rear end edge 55R of the auxiliary seat 55 is positioned rearward of the second cutout 125.
  • the front end edge 55F and the rear end edge 55R of the auxiliary sheet 55 are located on the outer side in the product longitudinal direction with respect to the crotch stretchable part 200 described later.
  • the front end edge 55F of the auxiliary sheet 55 is disposed in the range from the rear end edge 95R of the target portion described later to the front end edge 75F of the leg stretchable portion in the product longitudinal direction.
  • the range from the rear end edge 95R of the target portion to the front end edge 75F of the leg stretchable portion is a range including the rear end edge 95R of the target portion and the front end edge 75F of the leg stretchable portion.
  • the rear end edge 55R of the auxiliary sheet is disposed in the product longitudinal direction L within the range from the rear end edge 200R of the crotch stretchable part 200 to the rear end edge 75R of the leg stretchable part 75.
  • the range from the rear end edge 200R of the crotch expansion / contraction part 200 to the rear end edge 75R of the leg expansion / contraction part 75 is a range including the rear end edge 200R of the crotch expansion / contraction part 200 and the rear end edge 75R of the leg expansion / contraction part 75.
  • the auxiliary sheet 55 can be configured as a sheet similar to the top sheet 50.
  • the auxiliary sheet 55 has liquid permeability and guides body fluid from the top sheet side toward the absorber.
  • the auxiliary sheet 55 is preferably bulkier than the top sheet 50.
  • the auxiliary sheet 55 overlaps part of the first notch 115 and the second notch 125 in the thickness direction.
  • the auxiliary sheet 55 may overlap the entire first notch 115 and the second notch 125, or may not overlap the first notch 115 and the second notch 125.
  • the state in which two members overlap each other is not only the state in which the two members directly overlap, but another member is disposed between the two members, and the two members are indirectly Including the overlapping state.
  • the auxiliary sheet 55 of the present embodiment overlaps the inner edges of the first notch 115 and the second notch 125, but does not overlap the outer edges of the first notch 115 and the second notch 125.
  • Side flaps 70 are provided on the outer edges of the absorber 40, respectively.
  • the side flap 70 is comprised by the nonwoven fabric which piled up the 1 sheet or 2 or more sheets.
  • the pair of side flaps 70 are each provided with a fastening tape 90.
  • the covering sheet 40b, the auxiliary sheet 55, the top sheet 50, and the side flaps 70 constituting the absorber are laminated, and the sheets are joined together by an adhesive.
  • Fastening tape 90 extends along product width direction W in rear waistline region 30 and is fastened to target portion 95 in the front waistline region, thereby holding disposable diaper 10 on the wearer's body.
  • the target portion 95 is configured such that at least a part of the target portion 95 is disposed in the absorber arrangement region in which the absorber is arranged in the front waistline region, and the pair of fastening tapes 90 are fixed to each other.
  • the outer side of the absorbent body 40 in the product width direction is provided with a pair of leg stretchable portions 75 formed around the leg opening 35 and stretchable in the product longitudinal direction L.
  • the leg stretchable portion 75 is longer than the crotch stretchable portion 200 in the product longitudinal direction L, and is provided outside the crotch stretchable portion 200 in the product width direction W.
  • the leg expansion / contraction part 75 should just be comprised so that the leg periphery opening part 35 can be expanded-contracted in a product longitudinal direction, and may be arrange
  • leg stretchable part 75 is a part that is substantially shrunk in the longitudinal direction of the product by the stretchable sheet or the like, and is a concept that excludes a part where the stretchable sheet is disposed in a state where the shrinkage force is not exerted.
  • the leg elastic part 75 is disposed between the side flap 70 and the exterior sheet 60.
  • the leg stretchable part 75 is disposed between the back sheet 60a and the side flap 70.
  • the non-skin surface sheet of this Embodiment has the back sheet 60a and the exterior sheet 60, the non-skin surface sheet may be comprised only by the back sheet.
  • the leg stretchable part 75 of the present embodiment is constituted by a stretchable sheet.
  • the leg stretchable portion 75 may be configured by arranging one or a plurality of thread-like or strip-like elastic members made of polyurethane elastic fiber or natural rubber.
  • a pair of legside stretchable portions 80 extending along the product longitudinal direction L are provided inside the product width direction W of the pair of leg stretchable portions 75.
  • the leg side stretchable part 80 is an upright stretchable gather that is provided on the inner edge of the side flap and is arranged on the inner side in the product width direction than the leg stretchable part.
  • the side flap 70 is folded back to the top sheet side at the inner edge, and two layers are laminated.
  • An elastic member 83 is provided between the two layers of side flaps 70 so as to extend in the longitudinal direction. Two elastic members are provided on each of the left and right side flaps. The side flap 70 and the elastic member 83 form a leg side stretchable part 80.
  • the leg side stretchable part 80 has a joint part 81 joined to the back sheet 60a and the like, and a contraction part 82 in which an elastic member 83 is disposed and contracts in the product longitudinal direction.
  • the leg side stretchable portion 80 rises with the joint portion 81 as a base end portion when worn, and contacts the wearer's skin with the contraction portion 82 as a vertex.
  • the joint part 81 of the leg side stretchable part 80 includes a first joint part 811 disposed over the entire product longitudinal direction of the disposable diaper and a second joint disposed inside the product width direction from the first joint part 811.
  • the first joining portion 811 is joined to the backsheet 60a.
  • the second joint portion 812 is located outside the contraction portion 82 in the product longitudinal direction.
  • the second joining portion 812 is joined to the top sheet 50.
  • the front end edge 55F of the auxiliary sheet and the rear end edge 55R of the auxiliary sheet are arranged on the inner side in the product longitudinal direction than the second joint portion 812. That is, the front end edge 55F of the auxiliary seat is disposed behind the second joint portion 812 disposed in the front waistline region.
  • the rear end edge 55R of the auxiliary sheet is disposed in front of the second joint portion 812 disposed in the rear waistline region.
  • a waist stretchable portion 85 that can be stretched in the product width direction is provided.
  • the waist elastic part 85 contracts between the fastening tapes in the width direction.
  • the waist elastic part 85 is constituted by an elastic sheet. There are no particular limitations on the members constituting the waist stretchable portion 85.
  • the waist elastic part 85 is disposed between the exterior sheet 60 and the back sheet 60a.
  • Fastening tape 90 is attached to the region of the side flap 70 corresponding to the rear waistline region 30.
  • the fastening tape 90 is provided with a base sheet 91 connected to the side flap 70, an engagement hook (not shown) as a plurality of engagement members, and a hook sheet 92 fixed to the base sheet 91; Is provided.
  • the hook sheet 92 is an area where an engagement member is provided.
  • the target portion 95 is provided on the non-skin facing side surface of the exterior sheet 60 in the front waistline region.
  • the target portion 95 is configured so that the engaging hook of the fastening tape is hooked, and functions as a loop of a hook and loop locking system.
  • an air-through nonwoven fabric can be used as the target portion.
  • a first notch 115 as a first low weight portion and a second notch 125 as a second low weight portion are formed.
  • the first notch 115 and the second notch 125 are slits formed in the absorber 40.
  • a slit is a part in which an absorptive core does not exist.
  • the first notch 115 and the second notch 125 extend along the product width direction.
  • “extending along the product width direction” may be a configuration having at least a certain range in the product width direction, extending in the product width direction and extending in the product longitudinal direction. A configuration and a configuration extending in the product width direction and inclined in the product width direction are also included.
  • the first notch 115 and the second notch 125 each have a notch shape extending from the outer edge of the absorbent core 40a toward the inside in the product width direction.
  • the first notches 115 are a pair of left and right, and are spaced apart in the product width direction.
  • the second notches 125 are a pair of left and right, and are spaced apart in the product width direction.
  • the first notch 115 and the second notch 125 are arranged with an interval in the product longitudinal direction.
  • the second notch 125 is disposed behind the first notch 115.
  • the absorbent body 40 is formed with folds along the product width direction spaced apart in the product longitudinal direction.
  • the first cutout 115 and the second cutout 125 are arranged in a region where the crotch expansion / contraction part is arranged in the product longitudinal direction. That is, the front end edge 200F of the crotch expansion / contraction part is positioned in front of the front end edge of the first notch 115, and the rear end edge 200R of the crotch expansion / contraction part 200 is rearward of the rear end edge 200R of the second notch 125. Located on the side. Since the first notch 115 and the second notch 125 are formed, a flat “bottom” is easily formed along the body at the wearer's crotch when worn.
  • Each low weight portion has a notch shape extending from the outer edge of the absorbent core of the absorbent body toward the inner side in the product width direction. Moreover, the inner edge of each low fabric weight part is located in the product longitudinal direction between the front-end edge in the outer edge of each low fabric weight part, and the rear-end edge in the outer edge of each low fabric weight part.
  • the inner edge 115I of the first notch 115 has a front edge 115OF at the outer edge 115O of the first notch 115 and a rear edge at the outer edge 115O of the first notch 115 in the product longitudinal direction. Located between 115OR. That is, the inner edge 115I of the first notch 115 does not extend outward in the product longitudinal direction from the outer edge 115O of the first notch 115.
  • the inner edge 125I of the second notch 125 has a front edge 125OF at the outer edge 125O of the second notch 125 and a rear edge 125OR at the outer edge 125O of the second notch 125 in the product longitudinal direction, Located between. That is, the inner edge 125I of the second notch 125 does not extend outward in the product longitudinal direction from the outer edge 125O of the second notch 125. With such a shape, the shrinkage of the outer edge of the notch gathers toward the inner edge of the notch, and wrinkles due to the shrinkage are easily formed along the product width direction. That is, the wrinkles formed by the notches are formed along the product width direction.
  • the first notch 115 and the second notch 125 straddle the outer edge of the crotch stretchable part 200 in the product width direction. It is desirable that the pair of left and right first cutouts 115 be separated from each other without communicating with each other. Also, it is desirable that the pair of left and right second notches 125 be separated without communicating with each other.
  • the absorbent core 40a is preferably continuous without being separated by the first cutout and the second cutout.
  • the inner edge of the first notch 115 (second notch 125) has an arc shape in plan view. Moreover, the 1st notch 115 and the 2nd notch 125 are connected with the moderate curve shape with respect to the outer edge of an absorber. More specifically, a line from the front end edge 115OF of the first notch 115 toward the inner edge 115I of the first notch extends toward the inner side in the product width direction while moving backward. The angle formed by the line from the front end edge 115OF of the outer edge 115O of the first notch 115 to the inner edge 115I of the first notch and the outer edge of the absorber is an acute angle.
  • the first notch 115 can gradually guide the force and wrinkles from the outer edge of the absorber toward the inside in the product width direction.
  • a line from the front end edge 125OF at the outer edge 125O of the second notch 125 toward the inner edge 125I of the second notch extends toward the inner side in the product width direction while moving backward.
  • An angle formed by a line from the front end edge 125OF of the second notch 125 toward the inner edge 125I of the second notch and the outer edge of the absorber is an acute angle. Therefore, the second notch 125 can also guide the force and wrinkles from the outer edge of the absorbent body gradually toward the inside in the product width direction.
  • the line toward 115I is a convex shape toward the inside in the product longitudinal direction of the first notch 115.
  • the line from the front edge 125OF of the second notch 125 to the inner edge 125I of the second notch 125O and the inner edge of the second notch 125OR from the rear edge 125OR of the outer edge 125O of the second notch 125 is a convex shape toward the inside in the product longitudinal direction of the second notch 125. With such a shape, the area of the notch can be reduced, and the absorber can be deformed by the notch while ensuring the absorption performance.
  • the length of the first notch 115 and the second notch 125 increases in the product longitudinal direction L as it goes outward in the product width direction W. Since the amount of contraction at the outer edge of the first notch 115 and the amount of contraction by the outer edge of the second notch 125 are large, wrinkles formed by the first notch 115 and the second notch 125 are easy to follow along the product width direction. Become. In addition, since the amount of contraction at the outer edge of the first notch 115 and the amount of contraction by the outer edge of the second notch 125 are large, the crotch region of the disposable diaper has a more rounded shape.
  • such a shape makes it easier for the outer side of the absorbent core 40a in the product width direction W to shrink, so that a flat “bottom” is more easily formed.
  • the absorbent core 40a located closer to the front waistline region 20 than the first notch 115 and the absorbent core 40a located closer to the rear waistline region 30 than the second notch 125 rise from the “bottom”. Since it becomes easy to curve along the roundness of the wearer's body (abdomen and buttocks), the shape of the disposable diaper itself can be closer to the shape of the wearer's body.
  • the low weight per unit area is not limited to the slit.
  • the low basis weight portion may be a portion of the absorbent core where the basis weight of the absorbent material is lower than the surrounding area.
  • the crotch region 25 is provided with a crotch stretchable portion 200 that can be stretched at least in the product longitudinal direction.
  • the crotch stretchable part is configured to more easily maintain a flat shape in a part of the crotch region when the disposable diaper is worn than the other part of the absorber 40.
  • the crotch stretchable portion 200 is configured to be stretchable at least in the product longitudinal direction L or the product width direction W.
  • the crotch expansion / contraction part 200 is disposed so as to overlap the auxiliary sheet 55 and the absorber 40 in plan view.
  • the crotch expansion / contraction part overlaps at least a part of the first notch 115 and the second notch 125, and extends outward from the first notch 115 and the second notch 125 in the product longitudinal direction.
  • the crotch expansion / contraction part 200 is provided apart from the leg expansion / contraction part 75.
  • the width of the absorbent core 40a at the position where the crotch stretchable portion 200 overlaps the absorbent core 40a (in this embodiment, the position between the covering sheet 40b and the backsheet 60a that wraps the absorbent core 40a). It is configured to contract 60% or more of the length in the direction. In this way, by shrinking the portion where the absorbent core 40a is disposed by the crotch stretchable portion 200, the absorbent core 40a shrinks, and it is easy to maintain a flat shape compared to the portion where the absorbent core 40a does not shrink. Become.
  • the absorbent core 40a located in the front waistline area and the rear waistline area located outside the product longitudinal direction from the crotch stretch part 200 is not contracted by the crotch stretch part 200. Therefore, the crotch stretchable part 200 that is maintained in a flat shape at the crotch part of the disposable diaper in a state of being held around the waist / waist of the wearer by the fastening tape does not excessively adhere to the body, resulting in the crotch.
  • the stretchable part 200 is appropriately placed along the body.
  • the crotch stretchable part 200 can be stretched along the product longitudinal direction L, the front waistline region 20 and the back waistline region 30 are easily raised by the shrinkage of the crotch stretchable part 200.
  • a flat crotch region can be formed along the body at the part.
  • the crotch stretchable part 200 is disposed between the absorber 40 and the back sheet 60a in the thickness direction. Note that in a disposable diaper that does not have a back sheet, the crotch stretchable part 200 is disposed between the absorber 40 and the exterior sheet 60 in the thickness direction.
  • the crotch stretchable part 200 is preferably composed of a stretchable sheet.
  • the stretchable sheet can be composed of a stretchable sheet similar to the leg stretchable part 75, for example.
  • the crotch stretchable portion 200 may be configured by arranging a plurality of thread-like or band-like elastic members made of polyurethane elastic fiber or natural rubber.
  • a ridge extending in the product width direction is formed by contraction of the crotch stretchable portion 200 in the product longitudinal direction.
  • a recess (not shown) extending in the product longitudinal direction and a projection (not shown) extending in the product longitudinal direction are formed on the top sheet with an interval in the product width direction.
  • the concave portion and the convex portion of the top sheet 50 can be formed, for example, by making the volume of the concave portion relatively low and making the bulk of the convex portion relatively high, or by embossing only the concave portion in the thickness direction. .
  • the manufacturing method of an absorbent article includes at least a component part forming step, a component part placing step, a leg periphery forming step, and a cutting step.
  • the components constituting the absorbent article are formed.
  • the absorbent body 40 is manufactured by laminating an absorbent material, molding the absorbent core 40a, and covering the absorbent core 40a with a covering sheet 40b.
  • disposable diapers such as a stretchable sheet constituting the leg stretchable part 75, another web such as a web constituting the top sheet, a leakproof sheet, an absorber, etc. on the web constituting the backsheet
  • the component which comprises 10 is mounted.
  • the stretchable sheet constituting the leg stretchable part 75 is stretched, transferred to the intermittent drum while being further displaced in the width direction, and cut into individual product lengths on the intermittent drum. .
  • the interval between the stretchable sheets is provided with the rotation of the intermittent drum, and the stretchable sheet is transferred onto a continuous web. In this way, the leg stretchable portions can be arranged in a curved line.
  • the leg periphery forming step the top sheet 50, the exterior sheet 60, and the back sheet 60a are cut along the outer edge of the leg stretchable part 75. Thereby, the leg opening part 35 arrange
  • the continuous body in which the top sheet 50, the back sheet 60a, the absorber 40, and the like are arranged is cut into the size of one product along the product width direction W. Thereby, the disposable diaper 10 is manufactured.
  • FIG. 5 is a figure showing the state where a disposable diaper is equipped with a wearer.
  • FIG. 5 is a side view viewed from the side of the wearer.
  • the fastening tape 90 is fixed to the target portion 95, and the disposable diaper 10 is held around the wearer's waist.
  • the leg opening 35 is contracted by the leg elastic part 75 and is in close contact with the wearer's leg.
  • the crotch expansion / contraction part 200 expands / contracts, and the absorber 40 bends along the width direction starting from the first notch 115 and the second notch 125.
  • the absorber 40 is deformed from the first notch 115 and the second notch 125 as the base point, so that a flat “bottom” is formed in the crotch region.
  • the auxiliary sheet 55 is disposed on the skin facing surface side from the absorber 40.
  • the front edge 55F of the auxiliary sheet coincides with the rear edge of the target portion in the product longitudinal direction.
  • a step due to the difference in rigidity and the thickness of the auxiliary sheet is formed on the front end edge 55F of the auxiliary sheet and the rear end edge of the target portion. Therefore, a disposable diaper deform
  • the front edge 55F of the auxiliary sheet is arranged in accordance with the depression (proximal end of the bulge) of the stomach. Therefore, the folding line by a rigidity difference and thickness follows a hollow of the stomach, and a disposable diaper is arrange
  • the rear end edge 55R of the auxiliary sheet is disposed within the range from the rear end edge of the crotch stretchable part to the rear end edge of the leg stretchable part in the product longitudinal direction.
  • a step due to the difference in rigidity and the thickness of the auxiliary sheet is formed on the rear edge 55R of the auxiliary sheet.
  • the disposable diaper is deformed based on the difference in rigidity and the thickness.
  • the rear edge 55R of the auxiliary sheet is arranged in accordance with the bulge of the buttock (the apex of the bulge). Therefore, the fold line by a rigidity difference and thickness is arrange
  • a plurality of ridges extending in the product width direction are formed by shrinkage of the crotch stretchable part 200 in the product longitudinal direction in a region overlapping with the crotch stretchable part of the back sheet of the disposable diaper in the mounted state.
  • the wrinkle of the back sheet is formed on the outer side in the product longitudinal direction from the first notch 115 and the second notch 125 across the first notch 115 and the second notch 125.
  • the bulky auxiliary sheet 55 is disposed on the skin facing surface side of the absorber 40. Therefore, the skin facing surface of the disposable diaper 10 becomes bulky due to the auxiliary sheet 55, and is easily compressed when the wearing assistant presses it with a finger. Since the skin facing surface of the disposable diaper 10 that touches the skin is easily compressed, the touch of the top sheet 50 of the disposable diaper 10 can be improved.
  • the crotch expansion / contraction part 200 is arranged on the non-skin facing surface side of the absorber 40. Between the crotch stretchable part 200 and the top sheet 50, an absorbent body that includes an absorbent material and is difficult to be collected in a state where fine wrinkles are formed is disposed. Therefore, the contraction by the crotch expansion / contraction part 200 is transmitted to the back sheet 60a and the exterior sheet 60 rather than the top sheet 50, and wrinkles due to the contraction are formed on the surface of the back sheet or the like.
  • the non-skin facing surface of the disposable diaper is highly rigid due to the bag such as the back sheet, and is difficult to be compressed when the wearing assistant presses it with a finger.
  • the wearing assistant has determined that the skin of the disposable diaper 10 is more suitable than the configuration in which both the skin facing surface and the non-skin facing surface of the disposable diaper 10 are easily compressed. It was found that the greater the difference in ease of compression between the facing surface and the non-skin facing surface, the more the softness on the side that is more likely to be compressed and the softer the impression. Therefore, the skin-friendly surface of the disposable diaper 10 has a softer image than the non-skin-facing surface. By increasing the rigidity of the non-skin facing surface and decreasing the rigidity of the skin facing surface, the difference between the softness of the skin facing surface and the softness of the non-skin facing surface of the disposable diaper 10 is increased. As a result, a softer impression is given to a wearing assistant such as a mother, and the wearing assistant can use the wearer with confidence.
  • the crotch expansion / contraction part 200 overlaps the first notch 115 and the second notch 125 which are low weight parts in plan view, the low weight part of the absorber 40 when the crotch expansion / contraction part 200 contracts. It becomes difficult to inhibit the crotch expansion / contraction part 200 from contracting. As a result, the skin facing surface and the non-skin facing surface can be differentiated by the contraction of the crotch expansion / contraction part 200, and a wearing assistant such as a mother can obtain a softer impression.
  • the crotch expansion / contraction part 200 and the auxiliary sheet 55 overlap the first notch 115 and the second notch 125. Further, the crotch expansion / contraction portion 200 extends outward in the product longitudinal direction from the first notch 115 and the second notch 125. Therefore, the inside of the region where the crotch expansion / contraction part 200 is arranged can be deformed more flexibly, the contraction of the leg expansion / contraction part 75 can be absorbed, and the occurrence of wrinkles at unintended locations can be suppressed.
  • wrinkles other than the region overlapping the low basis weight portion can be suppressed on the top sheet 50 side that overlaps with the crotch stretchable portion 200 and is disposed with the absorbent body 40 interposed therebetween, resulting in a state of less wrinkles. Since the top sheet other than the region overlapping the low basis weight portion becomes soft, it can feel softer.
  • the low weight portion of the absorbent body 40 is narrowed when the crotch stretchable portion 200 is contracted at two locations separated in the product longitudinal direction.
  • the contraction by the crotch expansion / contraction part 200 affects a wide range, and the touch of the skin facing surface and the touch of the non-skin facing surface can be made different in a wider range, which is softer to the wearing assistant such as a mother. Can give an impression.
  • the first notch 115 and the second notch 125 are arranged in pairs with a space in the product width direction W, respectively.
  • the notches are arranged close to the four corners of the crotch expansion / contraction part 200 in plan view.
  • the center of the front crotch stretchable part and the rear crotch stretchable part are defined with the product longitudinal direction center of the crotch stretchable part 200 as a boundary, the center of the front crotch stretchable part in the product longitudinal direction and the first notch 115 It is desirable for the center in the longitudinal direction of the product to coincide. In addition, it is desirable that the center of the rear crotch expansion / contraction part in the product longitudinal direction coincides with the center of the second notch 125 in the product longitudinal direction. According to the said structure, the shrinkage
  • the wearing assistant confirms the feel of the disposable diaper
  • the finger placed on the top sheet and the finger placed on the back sheet are aligned along the longitudinal direction of the product. Sliding is done.
  • the wearing assistant can smoothly slide the finger on the top sheet 50 along the direction in which the convex portion of the top sheet extends.
  • the crotch stretchable part 200 is arranged so as to be stretchable in the product longitudinal direction L, the heels of the back sheet 60a and the exterior sheet 60 extend in the product width direction, so that the wearing assistant slides the finger on the back sheet. Your finger gets caught in the bag when Therefore, the wearing assistant cannot smoothly slide his / her finger on the back sheet.
  • the touch of the skin facing surface can be made different from the touch of the non-skin facing surface, and a wearing assistant such as a mother can obtain a softer impression.
  • the rigidity of the skin facing surface of the absorber 40 is relatively low.
  • the 2nd pressing part 42 formed in the non-skin opposing surface of the absorber 40 is linear, compared with the dotted
  • a linear second pressing portion 42 extending in the product longitudinal direction is formed on the non-skin facing surface side of the absorber 40, and a dotted first pressing portion 41 is scattered on the skin facing surface side of the absorber 40. Is formed.
  • the product 40 in the longitudinal direction of the absorbent body 40 has a curved shape protruding toward the skin facing surface. The curved shape makes it easier to compress the skin facing surface side of the disposable diaper, and the auxiliary sheet is arranged on the skin facing surface side of the absorbent body. Can emphasize the softness of the skin facing surface.
  • the covering sheet 40b is laminated on the non-skin facing surface side of the absorbent body 40, comparing the skin facing surface side and the non-skin facing surface side of the absorbent body 40, the rigidity difference due to the lamination of the covering sheet 40b, the absorbent body 40
  • the rigidity of the skin facing surface side is increased.
  • the rigidity of the skin facing surface and the rigidity of the non-skin facing surface can be made different, and a wearing assistant such as a mother can obtain a softer impression.
  • the disposable diaper 10 may be folded starting from a fold along the product width direction W in a packaging state of the disposable diaper.
  • a crease is formed around the folded fold.
  • the wrinkles due to the crease can be collected in the low weight part. Therefore, wrinkles around the fold can be reduced.
  • the compression work amount is a value indicating compressibility, that is, ease of compression, and a larger value means that compression is easier.
  • the compression work WC can be measured using a compression tester, for example, KES (model: KES-G5) manufactured by Kato Tech Co., Ltd.
  • the measurement position is a portion where the auxiliary sheet, the absorber, and the crotch expansion / contraction part are laminated, and either the auxiliary sheet or the crotch expansion / contraction part
  • the disposable diaper which does not have it was set as the position corresponding to the part on which the auxiliary sheet
  • the compression work from the skin facing surface side and the compression work from the non-skin facing surface side were measured.
  • the disposable diaper according to Example 1 has an auxiliary sheet and a crotch expansion / contraction part.
  • the disposable diaper which concerns on the comparative example 1 has an auxiliary
  • the disposable diaper which concerns on the comparative example 3 has a crotch expansion-contraction part, and does not have an auxiliary sheet
  • the disposable diaper according to Comparative Example 4 does not have both the auxiliary sheet and the crotch stretchable part. Note that the disposable diaper according to Example 1 and Comparative Examples 1 to 3 has the same configuration except for the auxiliary sheet and the crotch stretchable part.
  • the disposable diaper according to Example 1 has the largest difference between the compression work amount on the skin facing surface side and the compression work amount on the non-skin facing surface side, and it was found that the wearing assistant has the most gentle image on the skin. Moreover, it turned out that the disposable diaper which concerns on Example 1 has the highest compression work of the skin opposing surface side, and the softness of a skin contact surface is the highest.
  • a disposable diaper that can improve the feel of the skin sheet of a disposable diaper and gives a softer impression to a wearing assistant such as a mother so that the wearing assistant can safely wear it on the wearer.
  • Disposable diaper 20 ... Front waist area 25 ... Inseam area 30 ... Back waist area 35 ... Leg opening 40 ... Absorber 40a ... Absorptive core 40b ... Coating sheet 50 ... Top sheet 55 ... Auxiliary sheet 60 ... Exterior sheet 60a ... Back sheet 70 ... Side flap 75 ... Leg elastic part 80 ... Leg side elastic part 81 ... Junction part 82 ... Shrink part 83 ... Elastic member 85 ... Waist elastic part 90 ... Fastening tape 115 ... First notch 125 ... Second Notch 200 ... Crotch expansion / contraction part L ... Product longitudinal direction W ... Product width direction

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'invention concerne une couche jetable (10) qui comprend : une section d'entrejambe étirable (200) placée dans la région d'entrejambe ; une feuille auxiliaire (55) placée entre une feuille côté peau (50) et un corps absorbant (40) ; et une première découpe (115) et une seconde découpe (125) formées dans le corps absorbant (40) sous forme de sections de faible densité de fibre, dans lesquelles la densité de fibre du matériau absorbant est inférieure à celle des régions voisines dans le corps absorbant (40). La section d'entrejambe étirable (200), dans une vue en plan, chevauche le corps absorbant (40), la feuille auxiliaire (55) et au moins une partie des sections de faible densité de fibre (115, 125). La section d'entrejambe étirable (200) est placée, dans la direction d'épaisseur, entre le corps absorbant (40) et une feuille côté non peau (60a).
PCT/JP2014/067217 2014-06-23 2014-06-27 Couche jetable Ceased WO2014204015A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-128635 2014-06-23
JP2014128635A JP5800959B1 (ja) 2014-06-23 2014-06-23 使い捨ておむつ

Publications (1)

Publication Number Publication Date
WO2014204015A1 true WO2014204015A1 (fr) 2014-12-24

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PCT/JP2014/067217 Ceased WO2014204015A1 (fr) 2014-06-23 2014-06-27 Couche jetable

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JP (1) JP5800959B1 (fr)
WO (1) WO2014204015A1 (fr)

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WO2015156067A1 (fr) * 2014-04-09 2015-10-15 ユニ・チャーム株式会社 Couche jetable
EP3056175A4 (fr) * 2014-12-26 2016-08-17 Unicharm Corp Couche jetable
WO2017002491A1 (fr) * 2015-06-29 2017-01-05 ユニ・チャーム株式会社 Article absorbant
WO2017002492A1 (fr) * 2015-06-29 2017-01-05 ユニ・チャーム株式会社 Article absorbant
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

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JP6402135B2 (ja) * 2016-05-13 2018-10-10 ユニ・チャーム株式会社 吸収性物品

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WO2015156067A1 (fr) * 2014-04-09 2015-10-15 ユニ・チャーム株式会社 Couche jetable
EP3056175A4 (fr) * 2014-12-26 2016-08-17 Unicharm Corp Couche jetable
US10092456B2 (en) 2014-12-26 2018-10-09 Unicharm Corporation Disposable diaper
WO2017002491A1 (fr) * 2015-06-29 2017-01-05 ユニ・チャーム株式会社 Article absorbant
WO2017002492A1 (fr) * 2015-06-29 2017-01-05 ユニ・チャーム株式会社 Article absorbant
JP2017012289A (ja) * 2015-06-29 2017-01-19 ユニ・チャーム株式会社 吸収性物品
JP2017012290A (ja) * 2015-06-29 2017-01-19 ユニ・チャーム株式会社 吸収性物品
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

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