WO2014084230A1 - 使い捨ておむつ - Google Patents

使い捨ておむつ Download PDF

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Publication number
WO2014084230A1
WO2014084230A1 PCT/JP2013/081854 JP2013081854W WO2014084230A1 WO 2014084230 A1 WO2014084230 A1 WO 2014084230A1 JP 2013081854 W JP2013081854 W JP 2013081854W WO 2014084230 A1 WO2014084230 A1 WO 2014084230A1
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WO
WIPO (PCT)
Prior art keywords
width direction
product
leg
product width
disposable diaper
Prior art date
Application number
PCT/JP2013/081854
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
坂口　智
Original Assignee
ユニ・チャーム株式会社
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 ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to CN201380061623.3A priority Critical patent/CN104822348B/zh
Priority to BR112015012214A priority patent/BR112015012214A2/pt
Publication of WO2014084230A1 publication Critical patent/WO2014084230A1/ja

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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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007—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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F2013/49041—Form-fitting, self-adjusting disposable diapers with elastic means having a specific location other than covered by groups A61F13/49011 - A61F13/49019

Definitions

  • the present invention relates to a disposable diaper.
  • the diaper is an open type diaper, and includes an absorbent body and a side flap that extends outward in the product width direction from the absorbent body.
  • a main elastic material is disposed on the outer side in the product width direction from the absorbent body.
  • a diaper in which a secondary elastic material is disposed on the outer side in the product width direction of the material is disclosed (see, for example, Patent Document 1, FIG. 1, FIG. 2, pages 4 to 5).
  • the main elastic material is arranged around the wearer's leg.
  • the auxiliary elastic material is disposed on the outer side in the product width direction than the main elastic material in the vicinity of the longitudinal direction end of the disposable diaper.
  • the side part in the product width direction of the diaper is contracted by the secondary elastic material, and side leakage such as urine can be prevented.
  • the disposable diaper described above has the following problems.
  • the wearer's body is not symmetrical in front and back, and the buttocks located on the dorsal side is longer than the ventral side.
  • the conventional diaper is intended to cover the wearer's body with side flaps that extend outward in the product width direction from the absorbent body, but the front waistline region disposed on the wearer's ventral side, The rear waistline region arranged on the back side is symmetrical. Therefore, the conventional diaper is not arrange
  • the contracted part may be caught inside when the diaper is mounted, or the contracted part may be displaced in the mounted state, and the buttock may not be covered properly.
  • the elastic member when the elastic member is disposed around the base of the portion where the butt swells most, the side of the diaper rises when the leg is moved up and down, and the butt may be exposed.
  • the front waistline region and the rear waistline region are fixed only in the region where the fastening member is joined, it is likely that the secondary elastic member contracts and gets caught inside due to the movement of the wearer after the diaper is worn.
  • this invention is made
  • a disposable diaper according to the present disclosure (disposable diaper 10) has a front waistline region, a rear waistline region, and a crotch region located between the front waistline region and the rear waistline region, and from the front waistline region
  • An absorber having a product longitudinal direction toward the rear waistline and a product width direction orthogonal to the product longitudinal direction, straddling the crotch region and extending to at least one of the front waistline region and the rear waistline region
  • a side flap that straddles the front waistline region, the crotch region, and the rear waistline region and that is disposed on the outer side in the product width direction than the absorber, and a product width direction from the rear waistline region of the side flap
  • a pair of fastening tapes extending outward and fastened to the front waistline region, the side flaps having leg openings recessed toward the center in the product width direction of the absorber
  • a leg stretchable part disposed on the inner side in the product width direction than the leg opening and extending
  • a pair of flange expansion / contraction portions disposed across the crotch region and the rear waistline region and extending / contracting in the product longitudinal direction are disposed on both outer sides in the product width direction than the leg expansion / contraction portions,
  • the distance in the product width direction between the product width direction outer side end portion of the wrapping tape and the collar part stretchable portion is the product width direction between the product width direction center of the disposable diaper and the product width direction outer end portion of the leg stretchable portion.
  • the gist is that the distance is shorter than the distance.
  • FIG. 1 is a developed plan view of a disposable diaper according to the present embodiment.
  • FIG. 2 is a cross-sectional view of the disposable diaper along the line F1-F1 shown in FIG.
  • FIG. 3 is a cross-sectional view of the disposable diaper along the line F2-F2 shown in FIG.
  • FIG. 4 is a view showing a state in which the disposable diaper according to this embodiment is attached to the wearer.
  • FIG. 5 is a diagram illustrating a state where the disposable diaper according to the present embodiment is attached to the wearer.
  • 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 along the line F1-F1 shown in FIG.
  • FIG. 3 is a cross-sectional view of the disposable diaper along the line F2-F2 shown in FIG.
  • the developed plan view shown in FIG. 1 shows a state in which the elastic members 81 of the leg stretchable part 75 and the leg side gathers 80 are stretched until the folds such as the top sheet 50 and the side flap 70 constituting the disposable diaper are not formed. It is.
  • 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 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 absorbent body 40 that straddles the crotch region 25 and extends from the crotch region 25 toward at least one of the front waistline region 20 and the rear waistline region 30.
  • the absorber 40 includes an absorbent core 40a and a core wrap 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 core wrap 40b.
  • the core wrap 40b is a sheet that covers the absorbent core 40a. At least a part on the skin surface side of the core wrap 40b is constituted by various fiber nonwoven fabrics or tissue sheets having liquid permeability. For example, air-through nonwoven fabric of weight approximately 10 ⁇ 30g / m 2, spun bond nonwoven fabric, SMS can be used (spunbond - spunbond - meltblown) nonwoven or tissue sheet of the mass about 10 ⁇ 30g / m 2,.
  • a liquid-permeable top sheet 50 is provided on the surface side (skin contact surface side) of the absorber 40.
  • a liquid-impermeable back sheet 60a is provided on the back side (non-skin contact surface side) of the absorber 40.
  • An exterior sheet 60 is provided on the back surface side (non-skin contact surface side) of the back sheet 60a.
  • Side flaps 70 are respectively provided on side edges of the absorbent body 40 in the product width direction W.
  • the side flap 70 straddles the front waistline region 20, the crotch region 25, and the rear waistline region 30, and is disposed outside the absorbent body 40 in the product width direction.
  • the side flap 70 is comprised by the nonwoven fabric which piled up the 1 sheet or 2 or more sheets.
  • a pair of leg openings 35 are formed in the side flap 70 of the disposable diaper 10.
  • the leg opening 35 is provided at a side end portion in the product width direction of the disposable diaper, and is a portion that is disposed around the leg of the wearer while the disposable diaper is worn by the wearer.
  • the leg opening 35 is recessed toward the center of the absorbent main body in the product width direction.
  • the leg opening 35 includes a rear leg opening 35R positioned rearward of the product longitudinal center O4 of the leg opening and a front leg opening 35F positioned forward of the product longitudinal center of the leg opening.
  • the area between the rear leg opening 35R and a straight line passing through the center in the product width direction and parallel to the product longitudinal direction is a straight line passing through the front leg opening 35F and the center in the product width direction and parallel to the product longitudinal direction. It is wider than the area between.
  • the area is the area of the stretched state in which the elastic members 81 of the leg stretchable part 75 and the leg side gathers 80 are stretched until the wrinkles such as the top sheet 50 and the side flap 70 constituting the disposable diaper are not visually observable. is there.
  • the pair of side flaps 70 are each provided with a fastening tape 90.
  • the fastening tape 90 extends along the product width direction W in the rear waistline region 30, and is fastened to the non-skin contact surface of the front waistline region 20, thereby holding the disposable diaper 10 on the wearer's body.
  • the target portion 95 is disposed on the non-skin contact surface in the front waistline region, and is configured such that the pair of fastening tapes 90 are fixed to each other.
  • the front waistline region 20, the rear waistline region 30, and the fastening tape 90 constitute a waistline holding portion.
  • the waistline holding portion of the rear waistline region 30 is a range extending in the product width direction from the region where the engaging portion of the fastening tape 90 is provided.
  • the waistline holding portion of the front waistline region 20 is a range extending in the product width direction from the region where the target portion 95 is provided.
  • the disposable diaper 10 includes a crotch expansion / contraction part 200 disposed in a region overlapping the absorber in the crotch region 25.
  • the configuration of the crotch expansion / contraction unit 200 will be described in detail later.
  • the side flap 70 is provided with a pair of leg stretchable parts 75 that are arranged on the inner side in the product width direction than the leg opening 35 and can be stretched in the product longitudinal direction L.
  • the leg stretchable part 75 is longer than the crotch stretchable part 200 in the product longitudinal direction L and is provided outside the crotch stretchable part 200 in the product width direction W.
  • the leg expansion / contraction part 75 should just be comprised so that the leg opening part 35 can be expanded-contracted in a product longitudinal direction, may be arrange
  • a buttock stretchable part 77 that is disposed across the crotch region 25 and the rear waistline region 30 and stretches in the product longitudinal direction is disposed.
  • the leg stretchable portion 75 and the heel stretchable portion 77 are portions that contract substantially in the longitudinal direction of the product with thread rubber or the like, and are a concept that excludes the portion where the stretchable sheet is disposed in a state where the contraction force is not exerted. .
  • the configuration of the leg stretchable part 75 and the heel stretchable part 77 will be described in detail later.
  • a pair of leg side gathers 80 extending along the product longitudinal direction L are provided inside the pair of leg stretchable portions 75 (near the center in the product width direction W).
  • the leg side gathers 80 are provided at the inner end of the side flap 70 in the product width direction, and are erecting and expanding gathers disposed on the inner side in the product width direction than the leg stretchable parts 75.
  • the leg side gathers 80 are arranged on the inner side in the product width direction than the leg stretchable parts 75.
  • the leg side gathers 80 can adopt a conventionally well-known configuration. Specifically, the leg side gathers 80 may be formed of a sheet material different from the side flaps 70.
  • 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 product width direction.
  • the waist elastic part 85 is constituted by an elastic sheet.
  • the members constituting the waist elastic part 85 are not particularly limited, but it is preferable to use a member that is as thin as possible, has low bending rigidity, and has a small width ratio.
  • the waist stretchable portion 85 can easily bend along the body, and the waist stretchable portion 85 is placed along the body without applying a load to the wearer's body. Can be fitted.
  • the waist stretchable portion 85 by configuring the waist stretchable portion 85 with a material having a small width ratio, it is possible to suppress contraction in the product longitudinal direction of the disposable diaper when the disposable diaper extends in the product width direction, and to dispose the disposable diaper around the wearer's waist It is possible to suppress the diaper from being pulled down to the crotch side.
  • a stretchable film having a basis weight of 20 to 45 g / m 2 is used as the waist stretchable portion 85.
  • the waist stretchable portion 85 is stretched by 1.5 to 2.5 times the length in the non-stretched state (natural state) and then adhered to the exterior sheet 60 by a hot melt adhesive or heat treatment. .
  • the waist elastic part 85 is disposed between the exterior sheet 60 and the back sheet 60a.
  • the waist stretchable portion 85 is disposed between the core wrap 40b and the back sheet 60a or the exterior sheet 60. It may be.
  • the position of the waist elastic part is not particularly limited. Further, in a region where the absorbent body is not disposed, it may be disposed between the side flap 70 and the back sheet 60a or the exterior sheet 60.
  • the waist stretchable part according to the present embodiment is configured to stretch in the product width direction
  • the waist stretchable part may be configured to stretch in the product width direction and the product longitudinal direction.
  • 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 engaging member is provided, and constitutes a locking portion that is fastened to the target portion.
  • the above-described waistline holding portion is a region extending from the hook sheet 92 in the product width direction.
  • the hook sheet 92 is fixed to the base sheet 91, specifically, bonded.
  • the hook sheet 92 and the base sheet 91 are preferably joined so that the rigidity of the fastening tape 90 does not become higher than necessary.
  • the hook sheet 92 and the base sheet 91 are joined by a hot melt adhesive applied intermittently such as a dot shape, a line shape, or a spiral shape.
  • the hook sheet 92 and the base sheet 91 may be joined by heat sealing or the like.
  • the base sheet 91 is composed of one or two or more non-woven fabrics stacked.
  • a nonwoven fabric manufactured by a manufacturing method such as spunbond (SB) or spunbond-meltblown-spunbond (SMS) can be used.
  • the basis weight of the nonwoven fabric constituting the base sheet 91 is 30 to 120 g / m 2 , preferably 40 to 90 g / m 2 .
  • the target portion 95 is provided on the non-skin contact 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 fiber nonwoven fabric made of a polyolefin-based thermoplastic synthetic resin fiber or a polyolefin-based thermoplastic synthetic resin film can be used.
  • the loop attached to the target portion can be formed of a polyolefin-based thermoplastic synthetic resin.
  • a non-woven fabric which is a bulky non-woven fabric and which is partly embossed to prevent fluffing on the non-woven fabric surface may be used.
  • the exterior sheet 60 of the disposable diaper is formed of non-woven fabric, and the design indicating the attachment position of the fastening tape 90 is printed on the back sheet 60a or the non-skin contact side surface of the exterior sheet 60, or the design sheet is printed on the back sheet. It can also be set as the target portion by arranging it on the non-skin contact side of 60a or the exterior sheet 60.
  • the area between the rear leg opening and the straight line L1 passing through the center in the product width direction and parallel to the product longitudinal direction is parallel to the product longitudinal direction through the front leg opening and the center in the product width direction. It is wider than the area between the straight line L1. Therefore, the side flap located behind the product longitudinal center of the leg opening extends outward in the product width direction from the side flap located forward of the product longitudinal center of the leg opening, The area that can be covered is wide.
  • the straight line L1 passing through the center in the product width direction and parallel to the product longitudinal direction is a straight line passing through the center in the product width direction of the disposable diaper and parallel to the product longitudinal direction.
  • the wearer's body is not symmetric in the front-rear direction and has a larger surface area on the back side than on the abdominal side. This is because there is a buttock on the outside on the back side of the wearer.
  • the center in the product longitudinal direction of the leg opening tends to be a position corresponding to the center in the product longitudinal direction of the wearer's inseam.
  • the area between the rear leg opening located behind the product longitudinal center of the leg opening and the straight line passing through the center in the product width direction and parallel to the product longitudinal direction is the product longitudinal direction of the leg opening.
  • the position in the product width direction of the side flap located on the rear side of the product longitudinal direction center of the leg opening and the side flap located on the front side of the product longitudinal direction center of the leg opening is substantially the same position.
  • the leg opening 35 on the rear waistline side is turned up in the mounted state, and the wearer's buttocks may be exposed.
  • the product width direction edge part of a back waist area may be wound inside at the time of mounting
  • a disposable diaper can be arrange
  • a plurality of convex portions 36 that are convex outward in the product width direction are formed in the rear leg opening 35R.
  • the convex portion 36 is a portion protruding outward in the product width direction from the region before and after the leg opening.
  • the leg opening 35 is a portion that hits the wearer's leg and is a portion that easily enters the inside of the disposable diaper 10. Therefore, it is preferable that the leg opening 35 covers the body more widely, and it is particularly desirable that the rear leg opening 35R be disposed so as to cover the body widely.
  • the convex 36 is formed so that the pressure on the skin can be more dispersed. Is preferred. Specifically, stress is likely to concentrate near the base end of the fastening tape 90, and it may overlap in the front and back when the disposable diaper 10 is worn, so that the pressure on the skin can be dispersed. It is preferred that
  • the front leg opening 35F is formed with a recess that is recessed toward the inside in the product width direction.
  • the recessed portion 37 is a portion recessed inward in the product width direction from the front and back regions of the leg opening. Since the concave portion 37 is concave, it is easy to follow the wearer's ridge portion. For this reason, the side flap 70 and the leg expansion / contraction part 75 fit by a wearer, and the crotch region 25 from the front waistline area 20 of the disposable diaper 10 can be made to follow a body stably irrespective of a wearer's movement.
  • leg stretchable part and heel stretchable part The leg stretchable part 75 is arranged along the product longitudinal direction L outside the absorbent body 40 in the product width direction and is configured to be stretchable in the product longitudinal direction L. .
  • the leg stretchable part 75 is configured by a predetermined number of elastic members (in the example of FIG. 1, two elastic members).
  • the elastic member according to the present embodiment is made of polyurethane elastic fiber or natural rubber.
  • the collar expansion / contraction part 77 is configured by a predetermined number of elastic members (in the example of FIG. 1, one elastic member).
  • the elastic member according to the present embodiment is made of polyurethane elastic fiber or natural rubber.
  • the elastic member that constitutes the collar expansion / contraction part 77 of the present embodiment is a thread rubber arranged along the product longitudinal direction. Therefore, the entire area of the side flap 70 where the heel expansion / contraction part is provided can be evenly contracted so that the side flap 70 can follow the heel of the swelled wearer, so that the area can be covered without turning over. it can.
  • the distance La in the product width direction between the product width direction outer end of the fastening tape and the buttocks stretchable part is the distance Lb in the product width direction between the product width direction center of the disposable diaper and the product width direction outer end of the leg stretchable part 75. Shorter than.
  • the fastening tape 90 is pulled toward the front waistline region, and the fastening tape is fastened to the target portion 95 or the like in the front waistline region.
  • the product width direction outer side end portion of the fastening tape coincides with the product width direction center of the disposable diaper. In this state, the disposable diaper is most closely attached to the wearer. Therefore, when designing disposable diapers, it is necessary to verify the fit of the disposable diaper to the body of the wearer at the position where the outer end of the fastening tape in the product width direction matches the center of the disposable diaper in the product width direction. May be.
  • the distance La in the product width direction between the product width direction outer end of the fastening tape and the buttocks stretchable part is the center of the disposable diaper in the product width direction and the leg stretchable part 75. Because it is shorter than the distance Lb in the product width direction with the outer end of the product width direction, with the outer end of the fastening tape in the product width direction aligned with the product width direction center of the disposable diaper, 75 are arranged overlapping. Therefore, a gather can be formed cyclically
  • leg elastic part 77 and leg elastic part 75 it is possible to fit the leg opening 35 vicinity of the disposable diaper around the wearer's leg, even when the wearer moves the leg up and down, It is possible to prevent the leg opening 35 from being folded and to prevent the end of the product width direction from being caught at the time of mounting.
  • the product width direction outer side edge part of a leg expansion-contraction part is the width direction outer side edge part of the elastic member most located in the product width direction outer side, when there are two or more elastic members which comprise a leg expansion / contraction part. In the case where the number of elastic members constituting the leg stretchable part is one, it is the widthwise outer end of the elastic member.
  • the distance Lc in the product width direction between the product width direction outer end portion of the hook sheet 92 that is a fastening portion of the fastening tape and the collar portion stretchable portion 77 is the product of the product portion inner end portion of the target portion 95 and the leg stretchable portion. You may comprise shorter than the distance Ld in the product width direction with the width direction outer side edge part. According to such a configuration, the hook stretchable portion 77 and the leg stretchable portion 75 are overlapped with each other in a state where the hook sheet of the fastening tape is stopped at the innermost side in the width direction in the target portion. Therefore, a gather can be formed cyclically
  • the target unit 95 is spaced apart from the left and right, but the target unit can be configured to be continuous without being separated from side to side.
  • the inner end portion in the product direction of the target portion 95 does not exist, and when the hook sheet of the fastening tape is stopped at the innermost side in the width direction in the target portion, the outer end portion in the product width direction of the fastening tape is It will be in the state where it matched with the product width direction center of a disposable diaper.
  • the distance Lc in the product width direction between the product width direction outer end portion of the hook tape 92 of the fastening tape and the heel stretchable portion 77 is the distance between the product width direction center of the disposable diaper and the product width direction outer end portion of the leg stretchable portion. It is desirable that the distance is shorter than the distance Lb in the product width direction.
  • the hook stretchable portion 77 and the leg stretchable portion 75 are overlapped with each other in a state where the hook sheet of the fastening tape is stopped at the innermost side in the width direction in the target portion. Therefore, a gather can be formed cyclically
  • the product longitudinal direction center O3 of the leg stretchable part 75 is located in front of the product longitudinal direction center O1 of the disposable diaper in the extended state of the disposable diaper.
  • the product longitudinal center O4 of the leg opening 35 is located in front of the product longitudinal center O1 of the disposable diaper.
  • the leg stretchable part 75 is disposed.
  • the length in the product longitudinal direction L of the rear waistline region 30 is set.
  • the front waistline region 20 can be provided longer than the length in the product longitudinal direction L.
  • the wearer's body is not symmetrical in the front-rear direction, and the back side is longer than the ventral side.
  • the disposable diaper is not disposed along the body line that is asymmetrical in the front-rear direction.
  • the amount of skin stretching (length change) on the surface of the wearer's body is The back side (buttock) is larger than the side.
  • the length of the product longitudinal direction L of the rear waistline region 30 of the disposable diaper 10 in the natural state is the same as the length of the product longitudinal direction L of the front waistline region 20 of the disposable diaper 10 in the natural state. It is in a state of being stretched on the back side of the wearer.
  • the length in the product longitudinal direction L of the rear waist region 30 of the disposable diaper 10 in the natural state is set to the product longitudinal direction L of the front waist region 20 in the natural state of the disposable diaper 10. Therefore, the wearer's buttocks can be appropriately covered. Therefore, even if there is a movement of the wearer, the front waistline region 20 and the back waistline region 30 of the disposable diaper 10 are in a direction along the product longitudinal direction L due to the movement of the wearer's skin. It becomes possible to suppress the situation of moving and cover the buttocks appropriately.
  • the product longitudinal center O3 of the leg stretchable part 75 and the product longitudinal center O4 of the leg opening 35 are arranged in front of the product longitudinal center O1 of the disposable diaper, thereby moving the leg opening forward. It can be formed (near the ventral side).
  • the wearer's legs extend toward the front of the body. In the state engaged by the fastening tape 90, the leg opening 35 is in the front position, so that the diaper is more suitable for the wearer's body. Therefore, it becomes easy for the wearer to move his / her foot during wearing, and the rear waistline region can be made difficult to stick.
  • the buttocks stretchable portion 77 is disposed across the crotch region 25 and the rear waistline region 30, and the front end portion 77F of the buttocks stretchable portion is located behind the center of the leg opening 35 in the product longitudinal direction. . Therefore, the rear part of the leg stretchable part and the outer region in the product width direction are contracted by the buttock stretchable part 77, and the vicinity of the leg opening in the rear waistline region (the end part on the crotch side of the buttock) can be pulled up rearward and in the width direction. it can.
  • Drawing 4 is a figure showing typically the state where a disposable diaper was equipped.
  • the disposable diaper is pulled in the longitudinal direction of the product with the crotch region of the disposable diaper applied to the wearer's crotch and fixed with fastening tape or the like.
  • the disposable diaper may be pulled between the fastening portion of the fastening tape and the crotch region, and the leg opening 35 may not be disposed around the wearer's leg.
  • the buttock side has a larger area of the buttock than the wearer's stomach side, the product width direction end of the rear waistline region may be caught inside when wearing, and a part of the buttock may be exposed.
  • the disposable diaper can be brought close to the rear waistline region 30 by the buttocks expansion / contraction part 77, and the problem that the wearer's buttocks are exposed can be suppressed.
  • the distance D1 between the buttocks stretchable part 77 and the leg stretchable part 75 in the product width direction is desirably 10 mm to 30 mm.
  • the distance between the buttocks stretchable part 77 and the leg stretchable part 75 is longer than 30 mm, the buttocks stretchable part 77 and the leg stretchable part 75 stretch independently of each other, and the buttocks stretchable part 77 and the leg stretchable part 75 are interlocked. It is hard to do.
  • the distance between the heel stretchable portion and the leg stretchable portion in the product width direction in the extended state of the disposable diaper 10 is 10 mm to 30 mm, the heel stretchable portion 77 and the leg stretchable portion 75 are easily interlocked.
  • the distance D11 between the pair of elongate elastic parts is 150% to 200% of the length D12 of the absorbent body in the product width direction.
  • the distance D11 between the pair of buttocks stretchable parts in the extended state of the disposable diaper, the length of the absorbent body 40 in the product width direction is 100 mm to 120 mm, and the distance D11 between the pair of buttocks stretchable parts. Is between 150 mm and 240 mm.
  • the side flaps 70 and the heel part stretchable part 77 are symmetrical with respect to a straight line L1 that passes through the center in the width direction of the absorbent article and extends in the product longitudinal direction. Therefore, the distance D13 between the pair of flange expansion / contraction portions 77 and the outer end of the absorbent body 40 in the product width direction is 25% or more of the length of the absorbent body in the product width direction.
  • the side flap 70 corresponding to 25% of the length D12 of the absorbent body in the product width direction extends from the outer end portion in the product width direction of the absorbent body toward the outer side in the width direction.
  • the wearer's side can be covered at the extended portion.
  • the length of the absorbent body in the product width direction is the same as the distance from the apex (X1 and X1 shown in FIG. 5) of the heel part so that the absorbent body covers the bulge of the heel part. Or longer than the said distance is performed. Therefore, by setting the distance between the pair of heel expansion / contraction portions to 150% of the length of the absorbent body in the product width direction, the bulge of the heel portion can be covered without the absorber entering the heel portion.
  • the distance between the pair of elongate elastic parts is 200 mm to 240 mm.
  • the distance from the apex (X1, X1 shown in FIG. 5) of the buttocks is generally less than 200 mm for an infant. Therefore, when the distance between the pair of collar expansion / contraction parts is 200 mm to 240 mm, the collar expansion / contraction part can be disposed on the outer side in the width direction beyond the apex (X1, X1 shown in FIG. 5) of the collar part. Can cover the bulge.
  • the heel expansion / contraction part 77 is arranged linearly along the product longitudinal direction, and the side flap 70 is contracted in the product longitudinal direction by the butt expansion / contraction part 77. Since the buttocks expansion / contraction part 77 is linear, the arrangement
  • the disposable diaper 10 is enclosed in a package or the like, use a sample that is removed from the package and left in that state for 12 hours in an atmosphere of 20 ° C. ⁇ 2 ° C. and relative humidity 60% ⁇ 5% RH.
  • the length of the disposable diaper 10 in this state that is, the naturalness of the disposable diaper 10 is adjusted by using a spring measure manufactured by Shinwa Measurement Co., Ltd.
  • the length of the leg extension 75 in the state is measured.
  • the length of the stretched state is the length of the leg stretchable part 75 when the disposable diaper 10 is stretched from a natural state to a state where wrinkles due to the elastic member cannot be visually confirmed.
  • the above measurement was performed in each state, and the average value was defined as the length. Based on the measured length, the area can be calculated.
  • the leg opening 35 has a convex shape that extends from the outer side in the product width direction toward the inner side in the product width direction, and the inner end portion 35I that is located on the innermost side in the product width direction in the leg opening 35 in the stretched state of the disposable diaper 10 and the leg elastic part
  • the distance D2 to 75 is shorter than the distance in the product width direction between the leg stretchable part and the heel stretchable part, and is 15 mm or less.
  • the contraction force by the leg stretchable part 75 acts on the inner end of the leg opening 35. Therefore, there is a possibility that the leg opening 35 cannot be properly contracted by the leg expansion / contraction part 75.
  • the inner end 35I of the leg opening 35 is a portion that is sandwiched between the legs of the wearer in a worn state and is in close contact with the wearer.
  • the distance between the inner end 35I of the leg opening 35 and the leg stretchable part is 15 mm or less, at least a portion of the leg opening that is in close contact with the wearer can be contracted and arranged along the legs of the wearer.
  • a frill-like contraction part contracted by the leg extension part 75 and the buttocks extension part 77 is formed.
  • the leg stretchable part 75 and the buttocks stretchable part 77 can bring the frill-like contracted part into close contact with the body.
  • the leg stretchable portion It is easy to maintain the shape in which the entire area where the buttock expansion / contraction part of the side flap is arranged is widened by suppressing the wrapping of the inner end part and arranging the heel expansion / contraction part from the crotch part to the rear waistline region.
  • the frill formed by the leg elastic part 75 and the collar elastic part 77 expands and contracts in the product longitudinal direction, the frill extends along the product width direction.
  • This frill wrinkles becomes a support and can prevent the product width direction end part of the rear waistline region from getting inward in the width direction.
  • the buttocks stretchable portion 77 may be stretched over the entire region, or the regions at both ends thereof may be in a non-stretched state.
  • wrinkles are formed in the vicinity of the rear leg opening 35R by making the region (10 mm or less, 2 mm or more region, more preferably 5 mm or less, 2 mm or more region) at both ends of the buttocks stretchable portion 77 non-stretchable. It can be in a suppressed state. Therefore, the vicinity of the rear leg opening 35R can more closely follow the body.
  • an adhesive such as an HMA adhesive
  • the inner end 35I of the leg opening is located on the center line L2 along the product longitudinal direction through the center of the leg stretchable part and the heel stretchable part in the product width direction in the natural state of the disposable diaper 10.
  • the inner side edge part of a leg opening part can be pulled up by a leg elastic part and a collar part elastic part, and the entrainment of the inner side edge part of a leg opening part can be prevented. Therefore, the inner side edge part of a leg opening part can be arrange
  • 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 elongation rate of the leg stretchable part 75 is preferably 1.7 to 2.4 times.
  • the extension rate of the leg stretchable part 75 is set to 1.9 to 2.2 times.
  • the elongation rate means the degree of elongation of the leg stretchable part, and is defined as follows.
  • Elongation rate (length of leg stretchable part in stretched state) ⁇ (length of leg stretchable part in natural state)
  • this elongation rate shall be measured as follows, for example.
  • the disposable diaper 10 is taken out from the package. Subsequently, the arrangement
  • Each sample is left for 60 minutes in an atmosphere of 20 ° C. ⁇ 2 ° C. and a relative humidity of 60% ⁇ 5% RH, and the length of the leg stretchable part is measured along the stretch direction. This length is defined as “the length of the leg expansion / contraction part in the natural state”.
  • the length in the stretch direction of the desired region in such a state (that is, the natural state), and the desired state when stretched from the natural state to a state where wrinkles due to the elastic member cannot be visually confirmed on the non-stretchable sheet Measure the length of the region in the stretch direction. This length is defined as “the length of the leg stretchable part in the extended state”.
  • the elongation percentage is measured by calculating with the above formula.
  • the crotch stretchable part 200 is configured to maintain a flat shape in a part of the crotch region when the disposable diaper is worn rather 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 stretchable part 200 is provided separately from the leg stretchable part 75 and overlaps the absorbent core 40a (in this embodiment, between the core wrap 40b that wraps the absorbent core 40a and the backsheet 60a). Position), 60% or more of the length in the product width direction of the absorbent core 40a at the overlapping position is contracted. 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 region and the rear waistline region located outside the product longitudinal direction from the crotch stretchable portion 200 is not contracted by the crotch stretchable portion 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 portion 200 is stretchable along the product longitudinal direction L, the front waistline region 20 and the back waistline region 30 are easily raised by contraction of the crotch stretchable portion 200, and when worn, A flat crotch region can be formed along the body at the part.
  • the disposable diaper 10 can be stably attached so that the crotch region 25 of the disposable diaper 10 is disposed in the crotch region of the wearer by the contraction of the crotch stretchable part 200.
  • the crotch stretchable part 200 may be configured to extend to the front waistline region 20 side and the back waistline region 30 side across the center O1 of the disposable diaper 10 in the product longitudinal direction L.
  • center O2 of the crotch expansion / contraction part 200 in the product longitudinal direction L is arranged on the front waistline region 20 side with respect to the center O1 of the disposable diaper 10 in the product longitudinal direction L.
  • the amount of skin expansion and contraction (the amount of change in length) on the surface of the wearer's body ) Is larger on the dorsal side (buttock) than on the ventral side.
  • the rear waistline region 30 of the natural state of the disposable diaper 10 can be obtained.
  • the length in the product longitudinal direction L can be made longer than the length in the product longitudinal direction L of the front waistline region 20. Therefore, even if there is a movement of the wearer, the front waistline region 20 and the back waistline region 30 of the disposable diaper 10 are in a direction along the product longitudinal direction L due to the movement of the wearer's skin. It becomes possible to suppress the situation of moving.
  • the crotch stretchable part 200 is preferably composed of a stretchable sheet.
  • the absorbent core 40a in the region where the stretchable sheet is disposed is uniformly shrunk, and it becomes easier to maintain a flat shape.
  • the stretchable sheet can be constituted by 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.
  • the interval between the elastic members is 7 mm or less, more preferably 5 mm or less.
  • it is desirable that the difference in the interval between adjacent elastic members is 2 mm or less.
  • the elongation rate of the crotch stretchable part 200 is preferably 1.2 times or more and 1.8 times or less.
  • the expansion rate of the crotch expansion / contraction part 200 is set to 1.4 times.
  • the elongation rate means the degree of elongation in the expansion / contraction direction (product longitudinal direction L) of the crotch expansion / contraction part 200, and is defined as follows.
  • the elongation rate means the degree of expansion of the crotch expansion / contraction part 200 in the expansion / contraction direction (in the present embodiment, the product longitudinal direction L), and is defined as follows.
  • Elongation rate (length in the expansion / contraction direction of the crotch expansion / contraction part 200 in the maximum expansion state) / (length in the expansion / contraction direction of the crotch expansion / contraction part 200 in the natural state)
  • the measurement of an expansion rate is the same as that of the above-mentioned leg expansion-contraction part, and abbreviate
  • the elongation rate of the crotch stretchable part 200 By setting the elongation rate of the crotch stretchable part 200 to 1.2 times or more and 1.8 times or less, it is possible to suitably follow the stretch of the wearer's skin.
  • the expansion rate of the crotch expansion / contraction part 200 is less than 1.2 times, the crotch expansion / contraction part 200 is not sufficiently contracted in the natural state, and the disposable diaper 10 is compared with the case where the crotch expansion / contraction part 200 is not provided.
  • the shrinkage of the absorber region in the crotch of the wearer is small, and it becomes insufficient to take a flat shape along the body in the crotch of the wearer.
  • the expansion rate of the crotch expansion / contraction part 200 is larger than 1.8 times, the contraction dimension of the crotch expansion / contraction part 200 in the contraction direction becomes too large.
  • the disposable diaper 10 is likely to be in a close contact state, and easily displaced downward from the wearer.
  • the contraction amount of the crotch stretchable part 200 in the product longitudinal direction L may be configured to be 2 to 8% of the length of the disposable diaper 10 in the product longitudinal direction L.
  • the amount of shrinkage is the length “b (mm)” in a stretched state so that the wrinkles are sufficiently small and the surface of the sample is almost smooth, and in the natural state in the direction along the stretching direction of the sample. It is the difference from the length “a (mm)” and can be calculated by (b ⁇ a).
  • the inventor assumes that the amount of contraction of the crotch stretchable part 200 in the product longitudinal direction L is 2 to 8% of the length of the disposable diaper 10 in the product longitudinal direction L, and the process of mounting the disposable diaper 10 on the wearer. In the above, it was confirmed that the crotch stretchable part 200 is preferably easily along the wearer's body.
  • the amount of shrinkage of the crotch stretchable part 200 in the product longitudinal direction L is larger than 8%, the crotch stretchable part 200 is contracted too much, and the disposable diaper 10 is not sufficiently short in the product longitudinal direction L. It becomes difficult to attach the diaper 10 to the wearer's body, or the disposable diaper 10 and the wearer's body are in close contact with each other in the crotch region 25 and are likely to be displaced.
  • the amount of shrinkage of the crotch stretchable part 200 in the product longitudinal direction L is less than 2%, the effect itself of the crotch stretchable part 200 that brings the disposable diaper 10 closer to the wearer's body becomes difficult to manifest.
  • the center of the crotch expansion / contraction portion 200 in the product longitudinal direction L is arranged on the front waistline region 20 side of the center of the disposable diaper 10 in the product longitudinal direction L. Moreover, the crotch expansion / contraction part 200 is arrange
  • the thickness of the elastic member to be used and the pitch to be arranged can be appropriately selected. It is preferable that the entire side edge portion in the product width direction W of the absorbent core 40a is in a contracted state in the stretched state.
  • a notch 115 (notch 125) is formed in the crotch region 25 of the absorber 40.
  • the notch 115 and the notch 125 are regions where the absorbent core 40a constituting the absorber 40 is not present.
  • the notch 115 and the notch 125 correspond to a low-rigidity part in which the basis weight of the absorbent core 40a is lower than other parts of the absorbent core 40a.
  • the area of the notch 115 and the notch 125 is set so that the basis weight of the absorbent core 40a is lower than the other parts of the absorbent core 40a. Also good.
  • the notch 115 and the notch 125 exist along the edge of the crotch stretchable part 200 in the product longitudinal direction L. Even if the notch 115 and the notch 125 are formed, the absorbent core 40a located in the front waistline region 20 and the rear waistline region 30 is completely separated from the absorbent core 40a located in the crotch region 25. It is preferable that it is continuous especially in the product width direction.
  • the notch 115 and the notch 125 become wider in the product longitudinal direction L (the natural state of the disposable diaper 10) as they go outward in the product width direction W. With such a shape, the outer side of the absorbent core 40a in the product width direction W is more easily contracted, so that a flat “bottom” is more easily formed. Furthermore, the absorbent core 40a located closer to the front waistline region 20 than the notch 115 and the absorbent core 40a located closer to the rear waistline region 30 than the notch 125 rise from the "bottom part", and the wearer's Since it becomes easy to curve along the roundness of the body (abdomen and buttocks), the shape of the disposable diaper itself can be closer to the shape of the wearer's body.
  • the edge of the notch 115 (notch 125) close to the front waistline region 20 (rear waistline region 30) is arcuate.
  • the edge of the notch 115 (notch 125) is shaped such that the center of the arc is located in the rear waistline region 30 (front waistline region 20) with respect to the edge. With such a shape, deformation along the roundness of the wearer's body is easier and more likely to occur.
  • the width of the crotch stretchable part 200 in the product width direction W is 1 ⁇ 2 or more of the width of the absorbent core 40a in the product width direction W in the region where the crotch stretchable part of the absorbent core 40a exists.
  • the crotch expansion / contraction part 200 contracts a certain width or more of the portion where the absorbent core 40a is disposed, so that the absorbent core 40a contracts and the absorbent core 40a is lifted so as to approach the wearer's body.
  • the gap between the disposable diaper 10 and the wearer can be reduced by realizing such a raised crotch region of the absorbent core 40a.
  • the width of the crotch stretchable part 200 in the product width direction W is 60% or more of the width of the absorbent body 40 (absorbent core 40a) in the product width direction W, more preferably 80% or more, disposable diapers
  • the gap between 10 and the wearer can be further reduced.
  • the width of the crotch stretchable part 200 is too narrow compared to the width of the absorbent core 40a, it is difficult to obtain the effect of lifting the absorbent core 40a described above.
  • the width of the crotch stretchable portion 200 is too wide compared to the width of the absorbent core 40a, the portion where the absorbent core 40a is not disposed contracts more than the portion where the absorbent core 40a is disposed.
  • the disposable diaper 10 is attached.
  • the width of the crotch stretch part 200 is preferably 60 to 110 mm. More preferably, the width of the crotch stretchable part 200 is 90 to 110 mm.
  • the part where the width of the absorbent core 40a is the narrowest in the product width direction W is preferably provided 10 to 60 mm in front of the center line in the product longitudinal direction.
  • the portion where the width of the absorbent core 40a is narrowest in the product width direction W is provided on the front side of the product longitudinal direction by 20 to 40 mm.
  • the crotch stretchable part 200 is preferably formed across a region where the width of the absorbent core 40a is narrowest in the product width direction W.
  • the position where the left and right thighs of the wearer are closest to each other is the front side of the center of the wearer's body in the front-rear direction. Therefore, the portion where the width of the absorbent core 40a is the narrowest in the product width direction W can be positively arranged at the position where the left and right thighs of the wearer are closest to each other by the contraction force of the crotch stretchable portion 200. . In other words, even if a wear assistant such as a mother does not align the absorbent core 40a, the absorbent core 40a is naturally aligned.
  • 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 molded by laminating absorbent materials.
  • the elastic sheet constituting the leg stretchable part 75 on the web constituting the back sheet, the elastic sheet constituting the leg stretchable part 75, the other web such as the web constituting the top sheet, the leakproof sheet, the absorber, the leg stretchable part
  • the component parts which comprise the disposable diaper 10, such as 75 and the buttocks expansion-contraction part 77, are mounted.
  • the top sheet 50, the exterior sheet 60, and the back sheet 60a are cut.
  • the front end portion 77F of the buttocks stretchable portion 77 is cut, and the leg opening 35 is formed around the wearer's leg.
  • 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.
  • the leg stretchable part 75 may coincide with the joined part of the leg side gathers in the product width direction, or may be arranged on the inner side in the product width direction than the joined part of the leg side gathers.
  • the elastic members constituting the leg stretchable part 75 and the collar stretchable part 77 may be one, or may be two or more.
  • an open type disposable diaper has been described as an example, but the present invention can also be applied to a pants-type disposable diaper.
  • the outer layer sheets of the front waistline and the back waistline Has an elastic element that can be contracted and extended in the product width direction W, and the disposable diaper is held around the wearer's waist by contracting them. That is, the range where the left and right side edges extending in the product longitudinal direction L are joined is the waistline holding portion.

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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)
PCT/JP2013/081854 2012-11-27 2013-11-27 使い捨ておむつ WO2014084230A1 (ja)

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US10406040B2 (en) 2015-06-30 2019-09-10 The Procter & Gamble Company Absorbent article with elasticized waist region
US10561542B2 (en) 2015-06-30 2020-02-18 The Procter & Gamble Company Absorbent article with elasticized region
US11413196B2 (en) 2015-06-30 2022-08-16 The Procter & Gamble Company Absorbent article with elasticized waist region
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US11266550B2 (en) 2016-02-23 2022-03-08 Daio Paper Corporation Absorbent article and method for producing same

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