WO2013161954A1 - 使い捨ておむつ - Google Patents

使い捨ておむつ Download PDF

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Publication number
WO2013161954A1
WO2013161954A1 PCT/JP2013/062242 JP2013062242W WO2013161954A1 WO 2013161954 A1 WO2013161954 A1 WO 2013161954A1 JP 2013062242 W JP2013062242 W JP 2013062242W WO 2013161954 A1 WO2013161954 A1 WO 2013161954A1
Authority
WO
WIPO (PCT)
Prior art keywords
leg
longitudinal direction
region
stretchable
crotch
Prior art date
Application number
PCT/JP2013/062242
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 CN201380022383.6A priority Critical patent/CN104271092B/zh
Publication of WO2013161954A1 publication Critical patent/WO2013161954A1/ja
Priority to IN9071DEN2014 priority patent/IN2014DN09071A/en

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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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F13/49406—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being 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
    • A61F2013/49039—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located around the target zone
    • 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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F2013/4948—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being elastic

Definitions

  • the present invention relates to a disposable diaper.
  • a disposable diaper in which a leg stretchable portion that stretches and contracts is disposed along a leg opening.
  • the leg diaper opening of the disposable diaper configured in this manner is arranged along the wearer's leg circumference (see, for example, Patent Document 1).
  • the disposable diaper By wearing in such a state, the rear waist area tends to be stretched, the disposable diaper can not follow the movement of the leg, the disposable diaper is displaced, the disposable diaper obstructs the movement of the leg, the leg and the disposable A gap may be provided between the diaper and leakage may occur.
  • an object of the present invention is to provide a disposable diaper that can follow the movement of a wearer's leg while suppressing irritation to the skin.
  • a disposable diaper according to the present disclosure is located between a front waistline region (front waistline region 20), a rear waistline region (rear waistline region 30), and the front waistline region and the rear waistline region.
  • a product longitudinal direction product longitudinal direction L
  • product width direction product width direction W
  • An absorber absorbent body 40
  • leg diaper leg elastic part 75
  • leg stretchable part is It extends toward the outside in the product width direction from the lower region toward the outside in the product longitudinal direction, and contracts along the product longitudinal direction between the absorber and the leg stretchable part in the product width direction.
  • a possible auxiliary elastic part (auxiliary elastic part 76) is provided, and the auxiliary elastic part is arranged to be biased toward the rear waistline region side from the center in the product longitudinal direction, and the auxiliary elastic part
  • the gist is that the elongation rate in the product longitudinal direction is higher than the elongation rate in the product longitudinal direction of the leg stretchable part.
  • FIG. 1 is a developed plan view of a disposable diaper according to the present embodiment.
  • FIG. 2 is an exploded plan view of the disposable diaper according to the present embodiment.
  • FIG. 3 is a cross-sectional view of the disposable diaper along the line F1-F1 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.
  • FIGS. 1 and 2 are developed plan views of a disposable diaper 10 according to the present embodiment.
  • FIG. 3 is a cross-sectional view of the disposable diaper 10 taken along the line F1-F1 shown in FIG.
  • deployment top view shown in FIG. 1 is the figure of the state which extended the leg expansion-contraction part 75 and the leg side gathers 80 until the top sheet 50 which comprises the disposable diaper 10, the side flap 70 grade
  • the leg side gather 80 is illustrated in an expanded and contracted 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 a side end in the product width direction of the disposable diaper, and is a portion that is disposed along the leg of the wearer while the disposable diaper is worn by the wearer.
  • 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 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 is the same as a conventional disposable diaper, and can be appropriately configured 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 of the core wrap 40b on the skin contact surface side is constituted by various fiber nonwoven fabrics or tissue sheets having liquid permeability.
  • 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.
  • Side flaps 70 are respectively provided on side edges of the absorbent body 40 in the product width direction W.
  • 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.
  • 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 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 width direction from the region where the engaging member of the fastening tape 90 is provided.
  • the waistline holding portion of the front waistline region 20 is a range extending in the width direction from the region where the target portion 95 is provided.
  • the disposable diaper 10 is formed in the crotch region 25 and includes a crotch stretchable portion 200a that can be stretched in the product longitudinal direction L.
  • the crotch expansion / contraction portion 200a is disposed in the crotch portion 200 formed in the crotch region 25.
  • the configurations of the crotch unit 200 and the crotch expansion / contraction unit 200a will be described in detail later.
  • the surface side (top sheet 50 side) of the absorbent body 40 is formed around the leg opening 35 and is provided with a pair of leg stretchable portions 75 that can be stretched in the product longitudinal direction L.
  • the leg stretchable part 75 is longer than the crotch stretchable part 200a in the product longitudinal direction L, and is provided outside the crotch stretchable part 200a in the product width direction W. Further, an auxiliary expansion / contraction portion 76 that is contractible along the product longitudinal direction is disposed inside the leg expansion / contraction portion 75 in the width direction and outside the absorbent body 40 in the width direction. The configuration of the leg stretchable part 75 and the auxiliary stretchable part 76 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 in the product width direction of the side flaps 70, and are stand-up stretchable gathers that are arranged on the inner side in the product width direction than the leg stretchable parts.
  • the leg side gathers 80 are arranged on the inner side in the product width direction with respect to the leg stretchable part 75 and function as a legside stretchable part.
  • the side flap 70 is folded back to the surface sheet side at the inner end in the product width direction, and two layers are laminated.
  • An elastic member 71 (see FIG. 3) is provided between the two layers of side flaps 70 so as to extend in the longitudinal direction.
  • the side flaps 70 and the elastic members 71 form leg side gathers 80.
  • the developed plan view of the disposable diaper shown in FIG. 1 is a state in which the elastic member 71 of the leg side gather 80 is contracted, and the developed plan view of the disposable diaper in FIG. Indicates the state.
  • the leg side gathers 80 include a joining portion 81 joined to the top sheet 50 or the back sheet 60a, and a free end portion 82 on which an elastic member is disposed. Of the free end portion 82, the central portion in the longitudinal direction including the crotch region 25 is contracted in the product longitudinal direction by the elastic member 71 to form a contracted portion 84.
  • the leg side gather 80 rises with the joint portion 81 as the base end portion, and the contraction portion 84 of the free end portion 82 contacts the wearer's skin with the apex portion. That is, the joint portion becomes the base end portion of the rising side of the leg side stretchable portion.
  • the contraction portion 84 is a portion substantially contracted in the product longitudinal direction by the elastic member 71, and is a concept excluding a portion where the elastic member 71 is disposed in a state where the contraction force is not exerted. Further, in FIG. 2, in the leg side gather, a joining portion 81 where the side flap 70 and the top sheet 50 (or the back sheet 60a or the like) are joined is shown by hatching.
  • a plurality of joint portions 81 are provided, the first joint portion 81A is disposed on the outer side in the product longitudinal direction with respect to the contraction portion 84, and the second joint portion 81B is disposed on the outer side in the product width direction with respect to the contraction portion 84. ing. Therefore, the leg side gathers 80 are configured such that the center portion in the product longitudinal direction including the crotch region 25 stands on the wearer side.
  • the second joint portion 81B disposed on the outer side in the product width direction with respect to the contraction portion 84 is between the crotch stretch portion 200a and the leg stretch portion 75 in the product width direction W. Placed in.
  • the second joining portion 81B is joined to the back sheet 60a (and partly the exterior sheet 60) over the entire length in the product longitudinal direction.
  • the back sheet 60a is disposed between the absorber 40 and the exterior sheet 60, and functions as a leak-proof sheet.
  • the first joint portions 81A arranged on the outer side in the product longitudinal direction from the contraction portion 84 are joined to the top sheet 50.
  • the joining part 81 of the leg side gathers 80 can employ various configurations.
  • the joining portion may be, for example, a portion that extends from the crotch part to the front waistline region and the back waistline region in the product longitudinal direction and is joined to the top sheet, or liquid-impermeable on the outer side in the width direction than the absorbent core 40a. It may be a part joined to a conductive back sheet or exterior sheet, and is configured to be a standing base end part.
  • leg side gathers only need to be an upright gather disposed on the inner side in the product width direction with respect to the leg stretchable part, and are not limited to the above configuration, and it is possible to adopt a conventionally known leg side gather configuration. It is.
  • a waist stretchable portion 85 that can be stretched in the product width direction.
  • the waist stretchable portion 85 is disposed between the pair of fastening tapes in a plan view and contracts between the fastening tapes in the width direction.
  • the waist elastic part 85 is disposed on the surface of the top sheet on the skin contact side, and contracts between the fastening tapes in the 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.
  • 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 extension / contraction part is not particularly limited, but is preferably disposed closer to the non-skin contact surface than the absorber 40. 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 portion according to the present embodiment is configured to stretch in the product width direction, but the waist stretchable portion may be configured to stretch in the product width direction and the product longitudinal direction. Good.
  • the leg stretchable part 75 is disposed along the leg opening 35 provided on the outer side in the product width direction from the absorber 40, and is configured to be stretchable in the product longitudinal direction L.
  • the leg opening 35 and the leg expansion / contraction part 75 have a width direction inner end region 75I whose position in the width direction is located at the innermost side in the crotch region, and the product width from the crotch region 25 toward the product longitudinal direction outer side. It extends toward the outside in the direction.
  • the width direction inner end region 75I of the leg stretchable part 75 may be arranged continuously in the product longitudinal direction or may not be continuous in the product longitudinal direction.
  • the leg stretchable part 75 of the present embodiment is constituted by a stretchable sheet.
  • the stretchable sheet may be a stretchable film formed by melting a thermoplastic elastomer resin such as urethane or styrene, a stretchable nonwoven fabric made of stretchable fibers, a stretchable film or a stretchable nonwoven fabric.
  • a composite sheet or the like obtained by laminating a non-stretchable sheet that has been cut or weakened can be used.
  • the leg stretchable part 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.
  • 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 60 a and the side flap 70.
  • the stretchable sheet constituting the leg stretchable part 75 has a width of at least 5 mm (width in the product width direction W in the natural state of the disposable diaper 10) and at least 45 mm, more preferably at least 12.5 mm and not more than 35 mm, at least in the crotch region 25 It is preferable. If it is less than 5 mm, the effect of lowering the load on the skin due to the elastic element does not appear because the force of tightening partially does not concentrate by following the wearer's leg around the surface, and if it exceeds 45 mm As compared with the length of the entire disposable diaper in the product width direction, the region along the leg circumference becomes too wide, and the stretchable sheet is easily wound around the wearer's body or turned up.
  • the elongation rate of the leg stretchable part 75 is preferably 1.5 to 2.2 times. In the present embodiment, the expansion ratio of the leg expansion / contraction part 75 is set to 1.8 to 2.0 times.
  • the elongation rate means the degree of elongation of the leg stretchable part or auxiliary stretchable part, and is defined as follows.
  • this elongation rate shall be measured as follows, for example.
  • the disposable diaper 10 is taken out from the package. Subsequently, the arrangement
  • assistant expansion-contraction part after cut out is measured, and the expansion
  • the “length” is measured using a spring measure (tape: glass fiber-containing polyvinyl chloride coating) manufactured by Shinwa Measurement Co., Ltd.
  • 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 lengths of the leg stretch part and the auxiliary stretch part are measured along the stretch direction.
  • This length is defined as “the length of the leg elastic part in the natural state” and “the length of the auxiliary elastic 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 “length of leg stretchable part in extended state” and “length of auxiliary stretchable part in extended state”.
  • the elongation percentage is measured by calculating with the above formula.
  • the distance between the inner ends in the product width direction W of the pair of left and right leg expansion / contraction portions 75 becomes wider from the crotch region 25 toward the front waistline region 20, and as the distance from the crotch region 25 toward the rear waistline region 30 increases. And become wider.
  • the leg stretchable part follow the body line more by placing the leg stretchable part in a shape that narrows at the crotch and spreads toward the front and rear waistline, A leg expansion-contraction part will be suitably extendedly arranged around a wearer's leg.
  • the distance (D1 in the figure) at the end of the front waistline region 20 of the pair of left and right leg stretchable parts 75 is the distance (D2 in the figure) at the end of the rear waistline area 30 of the pair of left and right leg stretchable parts 75. Narrower than.
  • the interval is defined as the inner end in the product width direction W of the pair of left and right leg stretchable parts 75 after the disposable diaper 10 is expanded and held in the product longitudinal direction L and the product width direction W in a state where there is no wrinkle from the natural state. The distance between them is measured.
  • the stretch of the skin surface of the wearer's body is particularly large in the buttocks, and is prominent at positions closer to the outside in the width direction. Further, the leg stretchable part 75 is in close contact with the wearer's body. Therefore, by setting D2> D1, even when the movement of the wearer is applied to the disposable diaper 10, the leg stretchable part 75 on the buttock side can be stretched while being in close contact, and even if the amount of change in stretch is large, the leg The elastic part 75 does not stretch. Therefore, the displacement of the disposable diaper 10 by the leg expansion / contraction part 75 can be suppressed.
  • the auxiliary expansion / contraction part 76 is disposed between the absorber 40 and the leg expansion / contraction part 75 in the product width direction, and is configured to be contractible in the product longitudinal direction.
  • the auxiliary stretchable part 76 is not arranged in a curved shape along the leg opening 35 but is arranged in a straight line along the product longitudinal direction.
  • the auxiliary telescopic part 76 is constituted by a thread-like elastic member.
  • an elastic member having a thickness of 340 to 940 dtex can be used.
  • the extension rate of the auxiliary extension / contraction part 76 is configured to be higher than the extension rate of the leg extension / contraction part 75.
  • the extension rate of the auxiliary stretchable part 76 is preferably 1.8 to 2.5 times.
  • the extension rate of the auxiliary expansion / contraction part 76 is set to 2.1 times.
  • the auxiliary expansion / contraction part 76 is disposed between the back seat 60a and the side flap 70. Depending on the length of the back sheet 60a in the product width direction, it may be disposed between the side flap 70 and the exterior sheet 60.
  • the auxiliary expansion / contraction part 76 is offset from the center in the product longitudinal direction to the rear waistline side.
  • the region that expands and contracts by the auxiliary expansion / contraction part 76 is wider in the rear waistline region than in the front waistline region.
  • the leg elastic part 75 and the auxiliary elastic part 76 are parts that substantially contract in the longitudinal direction of the product by an elastic sheet, a thread-like elastic member, etc., and the elastic sheet is arranged in a state where the contraction force is not exerted. It is a concept that excludes parts.
  • FIG. 4 is a diagram schematically showing a state in which the disposable diaper according to the embodiment is mounted, and is a perspective view seen from the back of the wearer.
  • the leg opening 35 of the disposable diaper is arranged along the leg circumference by the leg elastic part 75, and the region inside the width direction from the leg opening is formed by the auxiliary elastic part 76 in the product longitudinal direction. Shrink in the direction.
  • the disposable diaper can be brought closer to the buttock vicinity side than the abdomen side by the auxiliary stretchable part 76 arranged biased to the rear waistline region side.
  • region by the auxiliary expansion-contraction part 76 can be provided in the position which contact
  • the distance between the wearer's legs is the narrowest in the crotch area and widens from the crotch area toward the abdomen and back. Since the leg opening and the leg stretchable part 75 have a shape extending from the crotch region toward the outside in the longitudinal direction toward the outside in the width direction, the leg circumference opening and the leg stretchable part 75 are arranged along the wearer's leg swing. Since it can arrange
  • the auxiliary stretchable part 76 can bring the diaper to the heel side, and the leg stretchable part 75 can arrange the leg opening along the leg circumference.
  • the disposable diaper can follow the movement of the buttocks while suppressing the extension rate of the leg stretchable part 75. Therefore, compared with the structure which raises the elongation rate of the leg expansion-contraction part 75 and makes a diaper contact
  • the leg stretchable part 75 is arranged along the wearer's leg, and the movement of the leg is transmitted to the entire disposable diaper via the leg stretchable part 75, and the position shift of the absorber 40 may occur.
  • the auxiliary stretchable part 76 can expand and contract more positively, can reduce the influence of the movement of the legs transmitted to the absorber, and can suppress the occurrence of displacement of the absorber.
  • auxiliary stretchable part 76 is disposed away from the leg stretchable part 75 in a plan view of the disposable diaper in an extended state. Since the auxiliary elastic part 76 and the leg elastic part 75 are separated from each other, the auxiliary elastic part 76 and the leg elastic part 75 contract independently without interfering with each other.
  • the auxiliary stretchable part 76 and the leg stretchable part 75 are arranged so as to overlap each other, when the disposable diaper is put on, the auxiliary stretchable part 76 may contract and the disposable diaper may not be placed along the legs. There is.
  • the auxiliary stretchable part 76 and the leg stretchable part 75 are separated from each other, they can function independently. Therefore, it is possible to fit the leg opening portion around the wearer's leg by the leg stretchable portion 75 and to bias the disposable diaper near the buttocks by the auxiliary stretchable portion 76.
  • the front waistline region end 76F of the auxiliary stretchable part 76 is disposed closer to the rear waistline than the widthwise inner end region 75I of the leg stretchable part 75.
  • the crotch region is a portion that faces the wearer's crotch
  • the width direction inner end region 75I of the leg stretchable portion 75 is a region that becomes the center in the longitudinal direction of the crotch region.
  • the product longitudinal direction outer side edge part of the auxiliary expansion-contraction part 76 is arrange
  • the front waistline side end portion 76F of the auxiliary stretchable part 76 is disposed closer to the back waistline side than the rear waistline side end part 95R of the target part 95, and the back waistline area of the auxiliary stretchable part 76
  • the side end portion 76R is disposed closer to the front waistline region than the end portion 90F on the front waistline region side of the fastening tape 90.
  • the waistline holding part is a part that holds the disposable diaper along the wearer's waist, and is arranged along the width direction.
  • the auxiliary telescopic part 76 is configured to contract in the product longitudinal direction. Therefore, for example, if the auxiliary stretchable part 76 is disposed so as to overlap the waistline holding part, the auxiliary stretchable part 76 may be displaced inward in the longitudinal direction. However, since the outer end in the product longitudinal direction of the auxiliary stretchable part 76 is arranged inside the product longitudinal direction from the waistline holding part, mutual interference is not alleviated and the waistline holding part is placed around the wearer's waistline. Can be placed along.
  • assistant expansion-contraction part 76 is arrange
  • the front waistline side end 76F of the auxiliary stretchable part 76 is arranged on the rear waistline side of the front waistline side end 75F of the leg stretchable part 75, and the backline around the auxiliary stretchable part 76
  • the region side end portion 76R is disposed closer to the front waistline region than the rear waist region side end 75R of the leg stretchable portion 75.
  • the leg stretchable portion 75 is configured to bend and contract the disposable diaper along the wearer's leg.
  • the product longitudinal direction end part of the leg expansion-contraction part 75 is arrange
  • the waistline holding part and the leg stretchable part 75 are connected to the auxiliary stretchable part 76. May be pulled inward in the product longitudinal direction, and the positions of the waistline holding portion and the leg stretchable portion 75 may be shifted.
  • the outer end of the auxiliary stretchable part 76 in the product longitudinal direction is located inside the product longitudinal direction of the leg stretchable part 75 in the product longitudinal direction, the waistline holding part and the leg stretchable part 75 in the product longitudinal direction Misalignment can be prevented.
  • auxiliary expansion / contraction part 76 is arranged on the outer side in the product width direction than the second joint part 81B of the leg side gathers.
  • the leg side gather is configured such that the contraction portion 84 on the inner side in the width direction from the second joint portion 81B rises toward the wearer with the second joint portion 81B as a base point.
  • the auxiliary stretchable portion 76 is disposed on the inner side in the width direction than the second joint portion 81B, the inner side in the width direction rises by the auxiliary stretchable portion 76 from the second joint portion 81B, and the contraction portion 84 is located on the outer side in the width direction. You may stand up. When the contraction portion 84 rises outward in the width direction, there is a possibility that body fluid leaks outward in the width direction. However, by disposing the auxiliary stretchable part 76 on the outer side in the width direction than the second joint part 81B, the contraction part 84 is easily raised on the wearer side.
  • the outer end of the auxiliary stretchable part 76 in the product longitudinal direction is disposed on the inner side in the product longitudinal direction of the contracted part of the leg side gathers in the product longitudinal direction.
  • the contraction range of the contraction part 84 becomes short, and a gap between the leg side gather and the body is likely to occur. This is because it becomes.
  • the crotch unit 200 includes the crotch expansion / contraction unit 200a.
  • the crotch expansion / contraction part 200a is configured to maintain a flat shape in a part of the crotch region when the disposable diaper is worn rather than other parts of the absorber 40.
  • the crotch part 200 includes a crotch expansion / contraction part 200a that can expand and contract at least in the product longitudinal direction L or the product width direction W.
  • the crotch stretchable portion 200a is provided separately from the leg stretchable portion 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 width direction of the absorbent core 40a at the overlapping position is contracted. In this way, by contracting the portion where the absorbent core 40a is disposed by the crotch stretchable portion 200a, the absorbent core 40a contracts, and it is easy to maintain a flat shape compared to the portion where the absorbent core 40a does not contract. Become.
  • the absorbent core 40a located in the front waist region and the rear waist region located outside the product longitudinal direction from the crotch stretch part 200a is not shrunk by the crotch stretch part 200a.
  • the crotch 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 does not excessively adhere to the body, and as a result, the crotch part 200 is appropriately disposed along the body. .
  • the crotch part 200 can be expanded and contracted along the product longitudinal direction L, the front waistline region 20 and the back waistline region 30 are likely to rise due to the shrinkage of the crotch part 200. Form a flat crotch region along the body. Since the front waistline region and the back waistline region rise from the crotch stretchable part 200a, the fit of the disposable diaper 10 to the wearer is improved.
  • the front waistline side end 76F of the auxiliary stretchable part 76 is located on the back waistline side of the front waistline side end 200aF of the crotch stretchable part and on the back waistline side of the crotch stretchable part. It is arranged closer to the front waistline region than the portion 200aR. With the crotch stretchable portion 200a positioned so that the crotch region faces the wearer's crotch, the contracted region contracted by the auxiliary stretchable portion 76 can be placed on the wearer's buttocks.
  • the crotch stretchable part 200a 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 200a may be configured by arranging a plurality of thread-like or strip-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 200a is preferably 1.2 times or more and 1.8 times or less.
  • the expansion rate of the crotch expansion / contraction part 200a 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 200a, and is defined as follows.
  • the elongation rate is defined in the expansion / contraction direction (product longitudinal direction L in the present embodiment). It means the degree of expansion of the crotch expansion / contraction part 200a, and is defined as follows.
  • Elongation rate (length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the maximum expansion state) / (length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the natural state)
  • this elongation rate shall be measured as follows, for example.
  • the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out of the package, and in that state, the atmosphere is 20 ° C. ⁇ 2 ° C. and relative humidity 60% ⁇ 5% RH 60. Leave for a minute and measure the length of the crotch stretch along the stretch direction. This length is defined as “the length in the expansion / contraction direction of the crotch expansion / contraction part 200a in the natural state”.
  • the length in the stretch direction of the desired region in such a state ie, the natural state
  • the elongation percentage is measured by calculating with the above formula.
  • the elongation rate of the crotch stretchable part 200a is set 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 ratio of the crotch expansion / contraction part 200a is less than 1.2 times, the crotch expansion / contraction part 200a is not sufficiently contracted in the natural state, and the disposable diaper 10 is compared with the case where the crotch expansion / contraction part 200a 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 stretchable part 200a is larger than 1.8 times, the shrinkage dimension of the crotch stretchable part 200a in the shrinking direction becomes too large, so that the region where the crotch stretchable part 200a exists is more than along the body.
  • the disposable diaper 10 is likely to be in a close contact state, and easily displaced downward from the wearer.
  • the shrinkage amount of the crotch stretchable part 200a 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 200a 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.
  • the crotch stretchable part 200a can be confirmed to be easily along the wearer's body.
  • the amount of shrinkage of the crotch stretchable part 200a in the product longitudinal direction L is larger than 8%, the crotch stretchable part 200a is shrunk too much, and the length of the disposable diaper 10 in the product longitudinal direction L is insufficient. 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 200a in the product longitudinal direction L is less than 2%, the effect itself of the crotch stretchable part 200a that brings the disposable diaper 10 closer to the wearer's body becomes difficult to manifest.
  • the center of the crotch expansion / contraction portion 200a 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 200a 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 contracted when the stretched state is set.
  • 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 in the product longitudinal direction L of the crotch part 200. 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. In particular, it is preferably continuous in the width direction.
  • the notches 115 and 125 become longer in the product longitudinal direction L 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 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 thread-like elastic member constituting the auxiliary stretchable part 76, the web constituting the top sheet, etc.
  • Components constituting the disposable diaper 10 such as a web, a leak-proof sheet, and an absorber are placed.
  • the stretchable sheet constituting the leg stretchable part 75 is stretched, transferred onto the intermittent drum while being 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 top sheet 50, the exterior sheet 60, and the back sheet 60a are cut along the width direction outer end of the leg stretchable part 75. As a result, a 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 disposable diaper according to the present embodiment includes a leg stretchable part 75 and an auxiliary stretchable part 76, and the auxiliary stretchable part 76 is arranged to be biased toward the rear waistline region, so that it is closer to the hip than the stomach side.
  • the element which comprises a disposable diaper can be brought near to the side.
  • assistant expansion-contraction part can be provided in the position which contact
  • the leg stretchable part 75 is arranged along the leg opening, and makes the leg opening close to the wearer's leg.
  • the auxiliary stretchable portion 76 and the leg stretchable portion 75 together, the auxiliary stretchable portion 76 can bring the diaper to the buttock side, and the leg stretchable portion 75 can arrange the leg opening along the leg circumference.
  • the disposable diaper can be configured to follow the movement of the buttocks while suppressing the stretch rate of 75.
  • auxiliary stretchable part 76 is disposed away from the leg stretchable part 75 in a plan view of the disposable diaper. Since the auxiliary elastic part 76 and the leg elastic part 75 are separated from each other, the auxiliary elastic part 76 and the leg elastic part 75 can contract independently without interfering with each other.
  • the front waistline side end portion 76F of the auxiliary stretchable part 76 is disposed on the rear waistline side of the widthwise inner end region located on the innermost side in the product width direction of the leg stretchable part 75 in the crotch region. Since the auxiliary stretchable part 76 is arranged behind the inner end region in the width direction, it is easy to place the diaper sufficiently in the rear waistline region without bringing the diaper in the crotch region.
  • the auxiliary expansion / contraction part 76 is arranged on the outer side in the product width direction than the second joint part 81B which is the base end part of the leg side gathers. For example, if the auxiliary stretchable portion 76 is disposed on the inner side in the width direction than the second joint portion 81B, the inner side in the width direction rises by the auxiliary stretchable portion 76 from the second joint portion 81B, and the contraction portion 84 is located on the outer side in the width direction. You may stand up. However, by disposing the auxiliary stretchable part 76 on the outer side in the width direction than the second joint part 81B, the contraction part 84 is easily raised on the wearer side.
  • the crotch expansion / contraction part 200a is provided in the absorber, the product longitudinal direction end part of the crotch expansion / contraction part 200a becomes an inflection point, and the absorber is easily deformed.
  • a low-rigidity part is formed on the inner side in the product longitudinal direction of the crotch expansion and contraction part. Since the absorbent core 40a located at the bottom rises from the “bottom” and easily curves along the roundness of the wearer's body (abdomen and buttocks), the shape of the disposable diaper itself is closer to the shape of the wearer's body be able to.
  • the front waistline side end 76F of the auxiliary stretchable part 76 is located between the front waistline side end 200aF and the back waistline side end 200aR of the crotch stretchable part in the product longitudinal direction.
  • the end 76R on the rear waistline region side of the auxiliary stretchable part 76 extends outward in the product longitudinal direction from the crotch stretchable part 200a.
  • assistant expansion / contraction part 76 contract without interfering with each other. Therefore, it is possible to arrange the waistline holding part along the wearer's waistline while suppressing the positional shift in the product longitudinal direction of the waistline holding part due to the influence of the auxiliary stretchable part 76.
  • assistant telescopic part 76 is arrange
  • the part functions without being affected by the auxiliary elastic part 76 and can prevent the position of the leg elastic part 75 in the product longitudinal direction.
  • the auxiliary expansion / contraction part 76 may not be arranged in a straight line but may be arranged in a curved line. Further, the leg stretchable part 75 and the auxiliary stretchable part 76 are separated in the width direction, but may be partially overlapped.
  • the front waistline side end portion 76F of the auxiliary stretchable portion 76 may coincide with the widthwise inner end region 75I of the leg stretchable portion 75 in the product longitudinal direction, or the widthwise inner end of the leg stretchable portion 75. It may be arranged on the front waistline region side with respect to the region 75I.
  • the auxiliary stretchable part 76 may coincide with the second joint portion 81B of the leg side gather in the product width direction, or may be disposed on the inner side in the product width direction than the second joint portion 81B of the leg side gather. .
  • the front waistline side end of the auxiliary stretchable part 76 may be disposed closer to the front waistline side than the front waistline side end of the crotch stretchable part, or the rear waistline side end of the crotch stretchable part You may arrange
  • At least one of the end portion on the front waistline region side of the auxiliary stretchable portion 76 and the end portion on the rear waistline region side of the auxiliary stretchable portion 76 may be disposed on the product longitudinal direction outside of the waistline holding portion.
  • the leg stretchable portion 75 may be disposed on the outer side in the product longitudinal direction than the outer end portion in the product longitudinal direction.
  • the open type disposable diaper has been described as an example, but the present invention can also be applied to a pants-type disposable diaper.
  • pants-shaped diapers having a waistline opening and a pair of leghole openings by joining the left and right side edges of the exterior sheet that forms the front waistline and the back waistline, the exterior of the front waistline and the back waistline
  • the sheet 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.
  • a leg gather formed of a string-like elastic member may be provided instead of the leg gather formed of an elastic nonwoven fabric sheet.
  • Disposable diaper 20 ... Front waist area 25 ... Inseam area 30 ... Back waist area 35 ... Leg opening 40 ... Absorber 40a ... Absorptive core 40b ... Core wrap 50 ... Top sheet 60 ... Exterior sheet 60a ... Back sheet 70 ... Side flap 71 ... Elastic member 75 ... Leg stretchable part 75F ... End part of leg waist part on the front waist area 75I ... Inner side area of leg stretch part in the width direction 75R ... End part on the back waist area side of leg stretch part 76 ... Auxiliary expansion and contraction part 76F: End part of auxiliary waist part on front waist area 76R ... End part of auxiliary waist part on rear waist area 80 ... Leg side gather 81 ...

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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/JP2013/062242 2012-04-27 2013-04-25 使い捨ておむつ WO2013161954A1 (ja)

Priority Applications (2)

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JP2012103461A JP5255139B1 (ja) 2012-04-27 2012-04-27 使い捨ておむつ

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Cited By (2)

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WO2015156067A1 (ja) * 2014-04-09 2015-10-15 ユニ・チャーム株式会社 使い捨ておむつ
JP5800959B1 (ja) * 2014-06-23 2015-10-28 ユニ・チャーム株式会社 使い捨ておむつ

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JP5580949B1 (ja) * 2014-04-09 2014-08-27 ユニ・チャーム株式会社 使い捨ておむつ
JP6308668B2 (ja) * 2014-06-30 2018-04-11 ユニ・チャーム株式会社 使い捨ておむつ
JP6456318B2 (ja) * 2016-02-26 2019-01-23 ユニ・チャーム株式会社 使い捨ておむつ

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JPS59157301A (ja) * 1983-02-18 1984-09-06 ジヨンソン・アンド・ジヨンソン・ベイビ−・プロダクツ・カンパニ− 人体適合性および液体保持性を改善した使い捨ておしめ
JPS62162002A (ja) * 1985-09-06 1987-07-17 キンバリ−　クラ−ク　コ−ポレ−シヨン 使い捨て下着
JP2003275236A (ja) * 2002-03-20 2003-09-30 Uni Charm Corp 使い捨ておむつ
JP2011110317A (ja) * 2009-11-30 2011-06-09 Kao Corp パンツ型吸収性物品

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USH1630H (en) * 1995-03-01 1997-01-07 The Procter & Gamble Company Diaper having plural upstanding leg cuffs
JP3411211B2 (ja) * 1998-03-27 2003-05-26 ユニ・チャーム株式会社 使い捨ておむつ
JP3515932B2 (ja) * 1999-11-30 2004-04-05 ユニ・チャーム株式会社 使い捨ての着用物品

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JPS59157301A (ja) * 1983-02-18 1984-09-06 ジヨンソン・アンド・ジヨンソン・ベイビ−・プロダクツ・カンパニ− 人体適合性および液体保持性を改善した使い捨ておしめ
JPS62162002A (ja) * 1985-09-06 1987-07-17 キンバリ−　クラ−ク　コ−ポレ−シヨン 使い捨て下着
JP2003275236A (ja) * 2002-03-20 2003-09-30 Uni Charm Corp 使い捨ておむつ
JP2011110317A (ja) * 2009-11-30 2011-06-09 Kao Corp パンツ型吸収性物品

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WO2015156067A1 (ja) * 2014-04-09 2015-10-15 ユニ・チャーム株式会社 使い捨ておむつ
JP2015198822A (ja) * 2014-04-09 2015-11-12 ユニ・チャーム株式会社 使い捨ておむつ
JP5800959B1 (ja) * 2014-06-23 2015-10-28 ユニ・チャーム株式会社 使い捨ておむつ
JP2016063849A (ja) * 2014-06-23 2016-04-28 ユニ・チャーム株式会社 使い捨ておむつ

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CN104271092B (zh) 2016-06-08
IN2014DN09071A (zh) 2015-05-22
JP2013230228A (ja) 2013-11-14
CN104271092A (zh) 2015-01-07
JP5255139B1 (ja) 2013-08-07
TWI549664B (zh) 2016-09-21
TW201404381A (zh) 2014-02-01

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