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CN104822348A - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
CN104822348A
CN104822348A CN201380061623.3A CN201380061623A CN104822348A CN 104822348 A CN104822348 A CN 104822348A CN 201380061623 A CN201380061623 A CN 201380061623A CN 104822348 A CN104822348 A CN 104822348A
Authority
CN
China
Prior art keywords
pars contractilis
width direction
product width
disposable diaper
leg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201380061623.3A
Other languages
Chinese (zh)
Other versions
CN104822348B (en
Inventor
坂口智
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of CN104822348A publication Critical patent/CN104822348A/en
Application granted granted Critical
Publication of CN104822348B publication Critical patent/CN104822348B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49017—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means being located at the crotch region
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F2013/49041—Form-fitting, self-adjusting disposable diapers with elastic means having a specific location other than covered by groups A61F13/49011 - A61F13/49019

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

Abstract

A disposable diaper (10) has leg elastic sections (75), which expand and contract in a product longitudinal direction, disposed further to the inside in a product width direction than a pair of leg opening sections. The area between a rear leg opening section (35R) and a straight line that passes through the center in the product width direction parallel to the product longitudinal direction is larger than the area between a front leg opening section (35F) and the straight line, which extends in the product longitudinal direction through the center of the leg opening sections in the product longitudinal direction. A pair of elastic buttock sections (77), which expand and contract in the product longitudinal direction, is disposed further to the outside in the product width direction than the leg elastic sections. The distance (La) in the product width direction between the outer edge of a fastening tape in the product width direction and the elastic buttock section is shorter than the distance (Lb) in the product width direction between the center of the disposable diaper in the product width direction and the outer edge of the elastic leg section in the product width direction.

Description

Disposable diaper
Technical field
The present invention relates to a kind of disposable diaper.
Background technology
In the past, disclose following a kind of diaper: this diaper is opening diaper, it possesses absorber and extends to than the flank of absorber by the position outside product width direction, main elastomeric material is being configured with by the position outside product width direction than absorber, secondary elastomeric material (for example, referring to Fig. 1, Fig. 2 of patent documentation 1, page 4 to page 5) is being configured with by the position outside product width direction than this main elastomeric material.
The lower limb that main elastomeric material is configured at wearer encloses.Near the length direction end that secondary elastomeric material is configured at disposable diaper than main elastomeric material by the position outside product width direction.Under the effect of secondary elastomeric material, the product width direction sidepiece of diaper shrinks, and can prevent the side leakages such as urine.
prior art document
patent documentation
Patent documentation 1: Japanese Patent Publication 2-96118 publication
Summary of the invention
But there is following problem in above-mentioned disposable diaper.
Not front and back are symmetrical for the health of wearer, but the buttocks being positioned at dorsal part is longer than veutro.The object of diaper is in the past to utilize and extends to than the health of absorber by the flank covering wearer of the position outside product width direction, but the front waist area being configured at the veutro of wearer is symmetrical with the rear waist area of the dorsal part being configured at wearer.Thus, diaper is not in the past configure in the mode of the lines along health, but is configured with the state tightened at the dorsal part of wearer.Specifically, the area of the flank contacted with buttocks is not enough, and flank is inwardly configured to the convex that (bodyside of wearer) is protruded, and flank becomes the state tightened.
If secondary elastic member contracts in such a state, then the constriction crimping to the inside when dressing diaper sometimes, or under wearing state, constriction departs from, and cannot cover buttocks rightly.
In addition, when dressing opening diaper, disposable diaper is configured in the below of wearer by the mode of aiming at the center of the lower crotch of wearer with the width center in leg-openings portion, after utilizing, waist area encases buttocks and waist area side stretching fixed component forward, utilizes fixed component diaper to be fixed on the waistline of wearer.Dress diaper if so, then can cover buttocks after just dressing.But, as shown in Fig. 2 and Fig. 3 of patent documentation 1, under the state that diaper is worn on wearer, near the root of the part that hip are heaved most, be configured with secondary elastic component.So, if be configured with elastic component near the root of the part heaved most at hip, likely when up and down lower limb, the sidepiece of diaper is rolled, and exposes hip.In addition, front waist area and rear waist area are fixed up by the region engaged owing to only utilizing fixed component, after dressing diaper, easily produce secondary elastic component shrink due to wearer's activity thus the situation being involved in inner side.
Therefore, the present invention completes in view of above-mentioned problem, and its object is to provides a kind of disposable diaper that can prevent end, the product width direction crimping when dressing while covering buttocks rightly.
Will being intended to of disposable diaper of the present disclosure (disposable diaper 10): this disposable diaper has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area, this disposable diaper has from described front waist area towards the product length direction of described rear waist area and the product width direction orthogonal with described product length direction, this disposable diaper possesses: absorber, its through described lower crotch region and to described front waist area and described after at least one in waist area extend; Flank, its through described front waist area, described lower crotch region and described after waist area, and to be configured at than described absorber by the position outside described product width direction; And a pair magic tape, it extends outside product width direction from the described rear waist area of described flank, and be fixed on described front waist area, have at described flank: leg opening part, it is to the central concave on the described product width direction of described absorber; And leg pars contractilis, it is configured at than described leg opening part by the position inside product width direction, and it is flexible on described product length direction, described leg opening part has: rear side leg opening part, and it is positioned at the position than side rearward, the center on the described product length direction of described leg opening part; and front side leg opening part, it is positioned at the position of side more forward than the center on the described product length direction of described leg opening part, described rear side leg opening part and the area by the center on described product width direction and between the straight line parallel with product length direction are greater than described front side leg opening part and area between the straight line extended by the center on described product width direction and along described product length direction, a pair buttocks pars contractilis is being configured with by the position outside two on described product width direction than described leg pars contractilis, this a pair buttocks pars contractilis be configured to through described lower crotch region and described after waist area, and it is flexible along described product length direction, distance between the product width direction outboard end of described magic tape and described buttocks pars contractilis on described product width direction is shorter than the distance between the center, product width direction of described disposable diaper and the described product width direction outboard end of described leg pars contractilis on described product width direction.
Accompanying drawing explanation
Fig. 1 is the expansion top view of the disposable diaper of present embodiment.
Fig. 2 is the sectional view along the F1-F1 line shown in Fig. 1 of disposable diaper.
Fig. 3 is the sectional view along the F2-F2 line shown in Fig. 1 of disposable diaper.
Fig. 4 represents that the disposable diaper of present embodiment is worn on the figure of the state of wearer.
Fig. 5 represents that the disposable diaper of present embodiment is worn on the figure of the state of wearer.
Detailed description of the invention
Next, be described with reference to the embodiment of accompanying drawing to disposable diaper 10 of the present invention.In addition, in the record of following accompanying drawing, identical Reference numeral is marked to identical part, similar Reference numeral is marked to similar part.But accompanying drawing is schematic, should notice that ratio of each size etc. is different from the ratio of reality.
Therefore, concrete size etc. should judge with reference to the following description.In addition, size relationship, the mutually different part of ratio is certainly comprised each other at accompanying drawing.
(1) the overall schematic configuration of disposable diaper
Fig. 1 is the expansion top view of the disposable diaper 10 of present embodiment.Fig. 2 is the sectional view along the F1-F1 line shown in Fig. 1 of disposable diaper.Fig. 3 is the sectional view along the F2-F2 line shown in Fig. 1 of disposable diaper.Expansion top view shown in Fig. 1 is the figure that the positive dough sheet 50, flank 70 etc. making the elastic component 81 of leg pars contractilis 75 and leg side rivel 80 be stretched to formation disposable diaper 10 does not form the state till the state of fold.
Disposable diaper 10 has front waist area 20, lower crotch region 25 and rear waist area 30.Front waist area 20 is the parts contacted with the frontal cowl of wearer (abdominal part).In addition, rear waist area 30 is the parts contacted with the rear waist portion (back) of wearer.Lower crotch region 25 is between front waist area 20 and rear waist area 30.
In addition, in the present embodiment, the past waist area 20 is called product length direction L towards the direction of rear waist area 30, the direction with the L-orthogonal of product length direction is called product width direction W.
Disposable diaper 10 possess through lower crotch region 25 and from lower crotch region 25 forward waist area 20 and after at least any one absorber 40 extended in waist area 30.Absorber 40 is made up of absorbent core 40a and core covering 40b.
Absorbent core 40a can be made up of the material identical with the material used in disposable diaper in the past, can use the known component such as comminution pulp, high absorption polymer, material suitably forms.Absorbent core 40a is coated by the core covering 40b of lamellar.
Core covering 40b is the sheet material of coated absorbent core 40a.The fabric nonwoven cloth that the part of the side, at least skin face of core covering 40b has a liquid permeability by various or cotton paper sheets (tissue sheet) are formed.Such as, grammes per square metre can be used to be about 10g/m 2~ 30g/m 2hot blast fabric nonwoven cloth, spun bond nonwoven fabric, SMS (spunbond-melt blown-spunbond) non-woven fabrics or grammes per square metre be about 10g/m 2~ 30g/m 2cotton paper sheets.
The positive dough sheet 50 of liquid permeability is possessed in the face side (side, skin contact face) of absorber 40.In addition, the back sheet 60a of opaque liquid is possessed in the rear side (side, non-skin contact face) of absorber 40.The rear side (side, non-skin contact face) of sheet 60a is provided with outer load 60 overleaf.
Side edge part on the product width direction W of absorber 40 is respectively equipped with flank 70.Flank 70 through front waist area 20, lower crotch region 25 and after waist area 30, and to be configured at than absorber 40 by the position outside product width direction.Flank 70 is formed by 1 non-woven fabrics or is made up of the non-woven fabrics of multiple overlaps of more than two.
A pair leg opening part 35 is formed at the flank 70 of disposable diaper 10.Leg opening part 35 is located at the side end on the product width direction of disposable diaper, and is the part of enclosing configuration under the state being dressed in wearer at disposable diaper along the lower limb of wearer.Leg opening part 35 is to the central concave on the product width direction of absorbent main body.
Leg opening part 35 has: rear side leg opening part 35R, and it is positioned at the position than the side rearward of the center O4 on the product length direction of leg opening part; And front side leg opening part 35F, it is positioned at the position of side more forward than the center on the product length direction of leg opening part.On front side of rear side leg opening part 35R and the area ratio by the center on product width direction and between the straight line parallel with product length direction leg opening part 35F and the area by the center on product width direction and between the straight line parallel with product length direction large.This area is the area under the state elastic component 81 of leg pars contractilis 75 and leg side rivel 80 being stretched to form the positive dough sheet 50, flank 70 etc. of disposable diaper 10 not formed till the state of fold.
In addition, magic tape 90 is respectively equipped with at a pair flank 70.Magic tape 90 extends along product width direction W in rear waist area 30, and is fixed in the non-skin contact face of front waist area 20, and thus, disposable diaper 10 is held in the health of wearer by magic tape 90.
Target portion 95 is configured in the non-skin contact face in front waist area, and is formed in the mode of fixing a pair magic tape 90 respectively.
In the present embodiment, waistline maintaining part is formed by front waist area 20, rear waist area 30 and magic tape 90.The waistline maintaining part of rear waist area 30 is scopes that the region being provided with bound fraction of self-adhesion cingulum 90 starts to extend on product width direction.The waistline maintaining part of front waist area 20 is the scopes starting from the region being provided with target portion 95 to extend on product width direction.
In addition, disposable diaper 10 possesses the crotch pars contractilis 200 being configured at the region overlapping with the absorber of lower crotch region 25.In addition, be described in detail in the aftermentioned structure to crotch pars contractilis 200.
Be provided with at flank 70 and be configured at than leg opening part 35 by the position inside product width direction and a pair leg pars contractilis 75 that can stretch on the L of product length direction.
Leg pars contractilis 75 is set to longer than crotch pars contractilis 200 on the L of product length direction, and on the W of product width direction than crotch pars contractilis 200 in the outer part.
Leg pars contractilis 75 is configured to make leg opening part 35 flexible on product length direction, leg pars contractilis 75 can be configured, the state configuration leg pars contractilis 75 that also can tilt relative to leg opening part 35 with a part for leg pars contractilis 75 along leg opening part 35.
In addition, be configured with buttocks pars contractilis 77 than leg pars contractilis 75 by the position outside product width direction, its be configured to through lower crotch region 25 and after waist area 30, and flexible along product length direction.
In addition, leg pars contractilis 75 and buttocks pars contractilis 77 are the parts of shrinking on product length direction in fact under the effect of rubber band etc., and are the concepts except configure the part of Stretchable sheet under the state not given play to contractility except.In addition, the aftermentioned structure to leg pars contractilis 75 and buttocks pars contractilis 77 is described in detail.
In addition, a pair leg side rivel 80 extended along product length direction L is provided with in the inner side (near the central authorities on the W of product width direction) of a pair leg pars contractilis 75.Leg side rivel 80 is located at the medial end on the product width direction of flank 70, and for being configured at than the flexible rivel of leg pars contractilis 75 by the erecting of the inner side on product width direction.Leg side rivel 80 is configured at than the position of leg pars contractilis 75 by the inner side on product width direction.Leg side rivel 80 can adopt known structure, specifically, can by with flank 70 phase independently other sheet material form.
In addition, the waistline pars contractilis 85 that can stretch on product width direction is provided with between a pair magic tape on product width direction.Waistline pars contractilis 85 makes the part between magic tape shrink on product width direction.
In the present embodiment, waistline pars contractilis 85 is made up of Stretchable sheet.Do not limit especially about the component forming waistline pars contractilis 85, but preferably use thin as far as possible and that bending stiffness is low, contracting amplitude-frequency is little component.Form waistline pars contractilis 85 by the material utilizing bending stiffness lower, waistline pars contractilis 85 is easy to bend along health, does not apply load waistline pars contractilis 85 just can be made along health of fitting corporally to the health of wearer.In addition, waistline pars contractilis 85 is formed by utilizing the material that contracting width is less, can disposable diaper be suppressed when disposable diaper extends on product width direction to shrink on product length direction, and suppress at the waistline place of wearer disposable diaper drop-down to crotch side.
In the present embodiment, as waistline pars contractilis 85, applying unit area weight is 20g/m 2~ 45g/m 2retractility film.
Waistline pars contractilis 85, being elongated after 1.5 times ~ 2.5 times to the length under non-elongate state (naturalness), utilizing hot-melt adhesive or heat treated etc. and is adhered to outer load 60.
In the present embodiment, waistline pars contractilis 85 is configured between outer load 60 and back sheet 60a.But when being configured to core covering 40b and extending to than the position of absorbent core 40a by the outside on product length direction, waistline pars contractilis 85 also can be configured between core covering 40b and back sheet 60a or between core covering 40b and outer load 60.The position of waistline pars contractilis does not limit especially.In addition, when being in the region not configuring absorber, waistline pars contractilis also can be configured between flank 70 and back sheet 60a or between flank 70 and outer load 60.
In addition, the waistline pars contractilis of present embodiment is formed in mode flexible on product width direction, but waistline pars contractilis also can be formed in mode flexible on product width direction and product length direction.
Magic tape 90 is installed on the region corresponding with rear waist area 30 of flank 70.Magic tape 90 possesses: substrate sheets 91, and itself and flank 70 are connected; And hook tabs 92, its be provided with multiple as combination member in conjunction with hook (not shown), and be fixed on substrate sheets 91.Hook tabs 92 is the regions being provided with combination member, and forms the engaging portion being fixed on target portion.Above-mentioned waistline maintaining part starts from hook tabs 92 region that extends on product width direction.
Hook tabs 92 is fixed in substrate sheets 91, is specifically engaged in substrate sheets 91.Joint between hook tabs 92 and substrate sheets 91 preferably can not make the rigidity of magic tape 90 be elevated to more than required degree.Specifically, the hot-melt adhesive applied discontinuously that hook tabs 92 and substrate sheets 91 preferably utilize point-like, wire or helical form such engages.In addition, hook tabs 92 and substrate sheets 91 also can be engaged by heat-sealing etc.
Substrate sheets 91 is made up of 1 non-woven fabrics or the non-woven fabrics of multiple overlaps of more than two is formed.As substrate sheets 91, the non-woven fabrics utilizing the manufacture method such as spunbond (SB) or spunbond-melt blown-spunbond (SMS) to manufacture can be used.The weight per unit area (being the summation of weight per unit area when multiple) forming the non-woven fabrics of substrate sheets 91 is 30g/m 2~ 120g/m 2, be preferably 40g/m 2~ 90g/m 2.
Target portion 95 is located at the surface of the non-skin contact side of the outer load 60 of front waist area.Target portion 95 is formed in the mode in conjunction with hook tangling magic tape, and waves function as the environment-development of locking system of hook and ring composition.As target portion 95, such as, hot-wind nonwoven cloth can be used.
Target portion 95 such as can use the thermoplastic synthetic resin film of fabric nonwoven cloth or the polyolefin made by the thermoplastic synthetic resin fiber of polyolefin.In addition, the thermoplastic synthetic resin of polyolefin can be utilized to form the ring being arranged on target portion.
And as target portion 95, also can use fluffy non-woven fabrics, this non-woven fabrics is by preventing nonwoven surface from fluffing its local embossing.
In addition, by the outer load 60 utilizing non-woven fabrics to form disposable diaper, the pattern of the installation site representing magic tape 90 is printed on the surface of the non-skin contact side of back sheet 60a or outer load 60, or the sheet material of pattern is configured in the non-skin contact side of back sheet 60a or outer load 60, also can makes target portion.
And, on front side of rear side leg opening part and the area ratio by the center on product width direction and between the straight line L1 parallel with product length direction leg opening part and the area by the center on product width direction and between the straight line L1 parallel with product length direction large.Thus, be positioned at and extend to flank than the position being positioned at side more forward than the center on the product length direction of leg opening part by the position outside product width direction than the flank of the position of side rearward, the center on the product length direction of leg opening part, the area that can cover health is larger.
In addition, by the center on product width direction and the straight line L1 parallel with product length direction refer to by the center on the product width direction of disposable diaper and the straight line parallel with product length direction.
Not front and back are symmetrical for the health of wearer, and the surface area of the surface area ratio veutro of dorsal part is large.This is because the outside of the dorsal part wearer exists buttocks.In addition, under the state that wearer has worn disposable diaper, the center on the product length direction of leg opening part is easy to become the position corresponding with the center on the product length direction of the in-leg of wearer.Such as, if than the center on the product length direction of leg opening part, the rear side leg opening part of the position of side and the area by the center on product width direction and between the straight line parallel with product length direction equal at the front side leg opening part of the position than the forward side, center on the product length direction of leg opening part and the area by the center on product width direction and between the straight line parallel with product length direction rearward, or rear side leg opening part and the area by the center on product width direction and between the straight line parallel with product length direction are less than front side leg opening part and area by the center on product width direction and between the straight line parallel with product length direction, then cannot configure disposable diaper in the mode covering the asymmetrical health in front and back, become the state tightened at the dorsal part place of wearer, or become the state of crooking at the veutro place of wearer.
And, on product width direction, roughly the same position is positioned at the flank be positioned at than the position of the forward side, center on the product length direction of leg opening part than the flank of the position of side rearward, the center on the product length direction of leg opening part if be positioned at, become the state tightened at the dorsal part place of wearer, the leg opening part 35 clot youngster of side, waist area after then sometimes under the state be worn, the buttocks of wearer exposes.In addition, owing to not having enough areas that can cover buttocks, after therefore sometimes when dressing, the end, product width direction of waist area is involved in inner side, and the buttocks of wearer exposes.
But, flank than the position being positioned at side more forward than the center on the product length direction of leg opening part is extended to by the position outside width than the flank of the position of side rearward, the center on the product length direction of leg opening part owing to being positioned at, therefore, it is possible to configure disposable diaper in the mode covering the asymmetrical health in front and back, and disposable diaper can be configured accordingly with the health of wearer.
The protuberance 36 of multiple convex in protruding outside product width direction is formed at rear side leg opening part 35R.Protuberance 36 projects to the part leaning on the position outside product width direction than the region of the front and back of leg opening part.Leg opening part 35 is positions that the lower limb that against wearer encloses, and is the part being easy to the inner side entering disposable diaper 10.Thus, leg opening part 35 preferably covers health more broadly, and especially, preferably, rear side leg opening part 35R is configured in the mode covering health on a large scale.By being provided with protuberance 36, increase the area of rear side leg opening part 35R part, and the convex by making its shape become outwardly, buttocks can be covered on a large scale.
Further, because stress is easy to concentrate on rear side leg opening part 35R, the particularly rear portion of rear side leg opening part 35R, it is therefore preferable that by forming protuberance 36, forming the state can disperseing the pressure to skin further in advance.Specifically, in the position of the cardinal extremity close to magic tape 90, stress is easy to concentrated, and is the position sometimes also forward lapped when wearing disposable diaper 10, therefore preferably forms convex can disperse the pressure to skin.
The recess in the shape caved in inside product width direction is formed at front side leg opening part 35F.Recess 37 is recessed to the part leaning on product width direction inner side than the region of the front and back of leg opening part.Due to recess 37 concavely, be therefore easy to the groin along wearer.Therefore, flank 70 and leg pars contractilis 75 fit in wearer further, and, regardless of the activity of wearer, can both to make from the front waist area 20 of disposable diaper 10 to the regional stability of lower crotch region 25 along health.Such as, even if when the activity narrowing such under the effect of the activity of the lower limb having carried out making the width of absorber 40 wearer, recess 37 also continues to fit in groin, and the mode that can not be able to narrow with the width of absorber 40 maintains wider state.Except relaxing the pressure to skin, protuberance 36 and recess 37 also need the health along wearer.
(2) structure of leg pars contractilis and buttocks pars contractilis
Leg pars contractilis 75 is configuring along product length direction L by the position outside product width direction than absorber 40, and can stretch along product length direction L.
Leg pars contractilis 75 is made up of the elastic component (being 2 elastic components in the example in fig 1) of predetermined radical.The elastic component of present embodiment is made up of polyurethane elastomeric fiber, natural rubber.Buttocks pars contractilis 77 is made up of the elastic component (being 1 elastic component in the example in fig 1) of predetermined radical.The elastic component of present embodiment is made up of polyurethane elastomeric fiber, natural rubber.
In addition, the elastic component forming the buttocks pars contractilis 77 of present embodiment is the rubber band configured along product length direction.Thus, owing to making the whole region being provided with buttocks pars contractilis of flank 70 shrink equably, and flank 70 can along the buttocks heaved that has of wearer, and therefore this region can not clot youngster cover buttocks.
Distance La between the product width direction outboard end of magic tape and buttocks pars contractilis on product width direction is shorter than the distance Lb between the center, product width direction of disposable diaper and the product width direction outboard end of leg pars contractilis 75 on product width direction.When disposable diaper is worn on wearer, waist area side stretching magic tape 90 forward, is fixed on the target portion 95 etc. of front waist area by magic tape.Now, if magic tape to be fixed on the position of width inner side, then the product width direction outboard end of magic tape is alignd with the center, product width direction of disposable diaper.In this condition, disposable diaper becomes the state being farthest close to wearer.Therefore, when designing disposable diaper, sometimes verify that disposable diaper fits in the stickiness etc. of the health of wearer in the product width direction outboard end of magic tape and the Centered position, product width direction of disposable diaper.
When verifying such stickiness, because the distance La between the product width direction outboard end of magic tape and buttocks pars contractilis on product width direction is shorter than the distance Lb between the center, product width direction of disposable diaper and the product width direction outboard end of leg pars contractilis 75 on product width direction, therefore, under the product width direction outboard end of magic tape and the Centered state in product width direction of disposable diaper, buttocks pars contractilis 77 is overlapping with leg pars contractilis 75.Annularly form rivel thereby, it is possible to enclose along the lower limb of wearer, thus the stickiness that lower limb encloses can be improved.
Thus, utilize buttocks pars contractilis 77 and leg pars contractilis 75, the lower limb fitting in wearer near the leg opening part 35 of disposable diaper can be made to enclose, even if when descending movable leg on the wearer, also leg opening part 35 can be prevented wrinkling, and prevent end, the product width direction crimping when dressing.
In addition, when the elastic component of formation leg pars contractilis is many, the product width direction outboard end of leg pars contractilis refers to the width outboard end being positioned at the outermost elastic component in product width direction, when the elastic component of formation leg pars contractilis is one, the product width direction outboard end of leg pars contractilis refers to the width outboard end of this elastic component.
In addition, also can be configured to, shorter than the distance Ld between the line of production medial end of target portion 95 and the product width direction outboard end of leg pars contractilis on product width direction as the distance Lc between the product width direction outboard end of the hook tabs 92 of the engaging portion of magic tape and buttocks pars contractilis 77 on product width direction.Adopt such structure, under the state hook tabs of magic tape being fixed on the position of inner side of the width in target portion, buttocks pars contractilis 77 and leg pars contractilis 75 overlap.Annularly form rivel thereby, it is possible to enclose along the lower limb of wearer, and the stickiness that lower limb encloses can be improved.
In addition, in the present embodiment, target portion 95, but also can so that dividing right and left, continuous print mode is not formed target portion in configuration of dividing right and left.In such target portion 95, there is not the line of production medial end of target portion 95, if the hook tabs of magic tape to be fixed on the position of width in target portion inner side, then become the product width direction outboard end of magic tape and the Centered state in product width direction of disposable diaper.Thus, preferably be configured to, the distance Lc between the product width direction outboard end of the hook tabs 92 of magic tape and buttocks pars contractilis 77 on product width direction is shorter than the distance Lb between the center, product width direction of disposable diaper and the product width direction outboard end of leg pars contractilis on product width direction.Adopt such structure, under the state hook tabs of magic tape being fixed on the position of inner side of the width in target portion, buttocks pars contractilis 77 and leg pars contractilis 75 overlap.Annularly form rivel thereby, it is possible to enclose along the lower limb of wearer, and the stickiness that lower limb encloses can be improved.
Center O3 on the product length direction of leg pars contractilis 75 is positioned at the position of side more forward than the center O1 on the product length direction of disposable diaper under the elongation state of disposable diaper.In addition, under the elongation state of disposable diaper, the center O4 on the product length direction of leg opening part 35 is positioned at the position of side more forward than the center O1 on the product length direction of disposable diaper.
So, by the center O4 on the product length direction of the center O3 on the product length direction of leg pars contractilis 75 and leg opening part 35 being configured at the position of side more forward than the center O1 on the product length direction of disposable diaper, under the state can dressing disposable diaper in the mode at the center that against on the product length direction of health with the center O4 made on the product length direction of the center O3 on the product length direction of leg pars contractilis 75 and leg opening part 35, length on the product length direction L of rear waist area 30 is arranged to longer than the length on the product length direction L of front waist area 20.
As mentioned above, not front and back are symmetrical for the health of wearer, but dorsal part is longer than veutro.Such as, if the length on the product length direction L of rear waist area 30 is identical with the length on the product length direction L of front waist area 20, then disposable diaper the lines of asymmetrical health cannot be configured along front and back.
Particularly, in the situation while being seated (particularly lift lower limb, stand) of wearer's activity, for the stroke (variable quantity of length) of the skin on the surface of the health of wearer, the stroke of dorsal part (buttocks) is larger than the stroke of veutro.Thus, such as, if the length on the product length direction L under the naturalness of the rear waist area 30 of disposable diaper 10 is identical with the length on the product length direction L under the naturalness of the front waist area 20 of disposable diaper 10, then become the state tightened at the dorsal part place of wearer.
But, adopt the disposable diaper of present embodiment, due to the length on the product length direction L under the naturalness of the rear waist area 30 of disposable diaper 10 can be made longer than the length on the product length direction L under the naturalness of the front waist area 20 of disposable diaper 10, therefore, it is possible to cover the hip circumference of wearer rightly.Thus, even if when wearer's activity, also the front waist area 20 of disposable diaper 10 and rear waist area 30 can be suppressed to be subject to the impact of the movement of the skin of wearer and in such situation that moves up along the court of product length direction L, buttocks can be covered rightly.
And, by the center O4 on the product length direction of the center O3 on the product length direction of leg pars contractilis 75 and leg opening part 35 being configured in the position of side more forward than the center O1 on the product length direction of disposable diaper, leg opening part can be formed at the position of forward side (near veutro).The lower limb of wearer extends towards the direction of the front side near health.Because leg opening part 35 is utilizing the position becoming forward side under the conjugate state of magic tape 90, therefore become the diaper of the health being more suitable for wearer.Therefore, when dressing, wearer is easy to movable leg, and rear waist area also can be difficult to tighten.
In addition, buttocks pars contractilis 77 be configured to through lower crotch region 25 and after waist area 30, the leading section 77F of buttocks pars contractilis is positioned at the position than side rearward, the center on the product length direction of leg opening part 35.Thus, the rear portion of leg pars contractilis and the region outside product width direction are shunk under the effect of buttocks pars contractilis 77, can by (end of the crotch side of buttocks) near the leg opening part of rear waist area towards pull-up outside rear side and width.Fig. 4 is the figure schematically showing the state of having dressed disposable diaper.
Such as, usually when dressing disposable diaper, under the state that the lower crotch region of disposable diaper againsts the in-leg of wearer, disposable diaper is stretched along product length direction, and utilize magic tape etc. to fix.Dress if so, then disposable diaper is stretched between the standing part and lower crotch region of magic tape, and leg opening part 35 sometimes cannot enclose along the lower limb of wearer and be configured.
Particularly, compared with the veutro of wearer, the area of the buttocks of buttocks side is comparatively large, and after when therefore likely dressing, the end, product width direction of waist area is involved in inner side, and the local of buttocks is exposed.But, buttocks pars contractilis 77 can be utilized to make disposable diaper near rear waist area 30, thus the problem that the buttocks of wearer exposes can be suppressed.
Preferably, under the elongation state of disposable diaper 10, the distance D1 between buttocks pars contractilis 77 and leg pars contractilis 75 on product width direction is 10mm ~ 30mm.Such as, if the distance between buttocks pars contractilis 77 and leg pars contractilis 75 is longer than 30mm, then buttocks pars contractilis 77 and leg pars contractilis 75 stretch independently of each other, and buttocks pars contractilis 77 and leg pars contractilis 75 are difficult to interlock.But under the elongation state of disposable diaper 10, the distance between buttocks pars contractilis and leg pars contractilis on product width direction is 10mm ~ 30mm, buttocks pars contractilis 77 and leg pars contractilis 75 are easy to interlock.Such as, if can expect, only buttocks pars contractilis shrinks independently, then when dressing diaper, constriction is involved in inner side, or swings to inner side.But, by making buttocks pars contractilis and leg pars contractilis interlock, buttocks pars contractilis can be suppressed to swing to inner side.
Distance D11 between a pair buttocks pars contractilis is 150% ~ 200% of the length D12 on the product width direction of absorber.Specifically, be the distance D11 under the elongation state of disposable diaper between a pair buttocks pars contractilis, the length on the product width direction of absorber 40 is 100mm ~ 120mm, and the distance D11 between a pair buttocks pars contractilis is 150mm ~ 240mm.Flank 70 and buttocks pars contractilis 77 are in symmetrical by the line by the width center of absorbent commodity and centered by the straight line L1 extended on product length direction.Thus, the distance D13 between the product width direction outboard end of a pair buttocks pars contractilis 77 and absorber 40 becomes more than 25% of the length on the product width direction of absorber.
If wearer wears the diaper so formed, outside width, then extend the flank 70 of 25% size of the length D12 on product width direction that width is absorber along with the product width direction outboard end of self-priming acceptor, this part of extending can cover the sidepiece of wearer.
Such as, when designing disposable diaper, make the distance between the length on the product width direction of absorber equals and buttocks is heaved summit (X1, X1 shown in Fig. 5), or make length on the product width direction of absorber than this distance, cover heaving of buttocks to make absorber.Thus, by the distance between a pair buttocks pars contractilis is set to 150% of the length on the product width direction of absorber, absorber does not enter buttocks just can cover heaving of buttocks.
In addition, preferably, the distance between a pair buttocks pars contractilis is 200mm ~ 240mm.And the distance between the summit that buttocks is heaved (X1, X1 shown in Fig. 5) is less than 200mm usually when infant.Thus, by making the distance between a pair buttocks pars contractilis be 200mm ~ 240mm, the summit (X1, X1 shown in Fig. 5) that buttocks pars contractilis can be made to exceed buttocks heave and be configured at outside width, and heaving of buttocks can be covered.
Buttocks pars contractilis 77 is linearly configured along product length direction, and utilizes buttocks pars contractilis 77 that flank 70 is shunk along product length direction.Because buttocks pars contractilis 77 is linearly, therefore with by curved for buttocks pars contractilis shape compared with the operation that is configured, the arrangement step of buttocks pars contractilis is easier to.Thus, the flexible multiplying power in buttocks pars contractilis is stablized.Its result, can suppress the inequality of the flexible multiplying power of buttocks pars contractilis, suppresses the stress of local applying caused by contractility, and can suppress the problems such as buttocks pars contractilis clot youngster.Thereby, it is possible to form buttocks pars contractilis 77 more suitably along buttocks configuration, the state covering buttocks.
In addition, the measurement of " length " in undertaken this description by following measuring method.
Use following sample, this sample is when during disposable diaper 10 is sealing into packaging etc., takes out disposable diaper 10 from packaging, with this state 20 DEG C ± 2 DEG C, place under the environment of relative humidity 60% ± 5%RH and obtain for 12 hours.
Next, use elasticity tape measure (the tape portion: take glass fibre as base material of affine mensuration Co., Ltd. of Japan, take polrvinyl chloride as cover layer), along measuring object position, measure the length under this state of disposable diaper 10, namely measure the length under the naturalness of the leg pars contractilis 75 of disposable diaper 10.In addition, length under elongation state is measured disposable diaper 10 to extend to from naturalness and is obtained by the length of the leg pars contractilis 75 during the state of range estimation identification less than the fold caused by elastic component.
Herein, under each state, above-mentioned measurement is carried out, using this meansigma methods as length to 10 samples.Based on so measuring the length obtained, can reference area.
Leg opening part 35 is in the convex protruded inside product width direction outside product width, leg opening part 35 place under the elongation state of disposable diaper 10 is shorter than the distance between leg pars contractilis and buttocks pars contractilis on product width direction at the distance D2 of product width direction between the medial end 35I of the position of inner side and leg pars contractilis 75, and is below 15mm.
If under the elongation state of disposable diaper 10, distance between the medial end 35I of leg opening part 35 and leg pars contractilis 75 is longer than 15mm, contractility then likely caused by leg pars contractilis 75 cannot be applied to the medial end of leg opening part 35, thus cannot utilize leg pars contractilis 75 that leg opening part 35 is shunk rightly.In addition, the medial end 35I of leg opening part 35 is being clipped by the lower limb of wearer under the state of wearing and is being close to the part of wearer.By making the distance between the medial end 35I of leg opening part 35 and leg pars contractilis be below 15mm, the portion retracts be close to wearer that at least can make leg opening part, and enclose along the lower limb of wearer and be configured.
The contraction flow region in ruffle shape shunk under the effect that flank 70 is formed at leg pars contractilis 75 and buttocks pars contractilis 77.Leg pars contractilis 75 and buttocks pars contractilis 77 can be utilized to make the contraction flow region of ruffle shape be close to health.In addition, because leg opening part place is shorter than the distance between leg pars contractilis and buttocks pars contractilis by the distance of product width direction between the medial end 35I of the position of inner side and leg pars contractilis, therefore leg pars contractilis is utilized to suppress the crimping of the medial end of leg opening part, in the region of rear waist area, buttocks pars contractilis is being configured, the shape that the whole region being configured with buttocks pars contractilis being easy to maintain flank has been unfolded from lower crotch.
And the ruffle formed owing to utilizing leg pars contractilis 75 and buttocks pars contractilis 77 is flexible along product length direction, and therefore ruffle (fold) stretches along product width direction.This ruffle (fold) becomes support, thus the end, product width direction of rear waist area can be prevented to be involved in inside width.
In addition, buttocks pars contractilis 77 both can be retracted position in whole region, also can be that the region at its both ends is non-telescoping state.Such as, be set to non-telescoping state by the region (region of 2mm ~ 10mm, the more preferably region of 2mm ~ 5mm) at the both ends by buttocks pars contractilis 77, the state that inhibit fold can be formed near rear side leg opening part 35R.Thus, can more seamlessly along health near rear side leg opening part 35R.In addition, by not arranging the bonding agents such as HMA bonding agent in the end of buttocks pars contractilis 77, the edge at the place, end of the buttocks pars contractilis 77 of rear side leg opening part 35R can be made soft.
Under the naturalness of disposable diaper 10, the medial end 35I of leg opening part is positioned in centre line L 2, and this centre line L 2 is by the center between leg pars contractilis and buttocks pars contractilis on product width direction and along product length direction.Adopt such structure, leg pars contractilis and buttocks pars contractilis can be utilized the medial end pull-up of leg opening part, and the crimping of the medial end of leg opening part can be prevented.Thereby, it is possible to make the medial end of leg opening part be configured along health.
Leg pars contractilis 75 is configured between flank 70 and outer load 60.Or in the region possessing the back sheet 60a be configured between absorber 40 and outer load 60, leg pars contractilis 75 is configured between back sheet 60a and flank 70.
The percentage elongation of leg pars contractilis 75 is preferably 1.7 times ~ 2.4 times.In the present embodiment, the percentage elongation of leg pars contractilis 75 is set to 1.9 times ~ 2.2 times.In addition, the degree being meant to the elongation of leg pars contractilis of percentage elongation, is defined as following.
Percentage elongation=(length of leg pars contractilis under elongation state) ÷ (leg pars contractilis length in its natural state)
In addition, in this manual, such as next, this percentage elongation is measured.
1st, when during disposable diaper 10 is enclosed in packaging etc., take out disposable diaper 10 from packaging.Then, the configuring area of clip leg pars contractilis.Now, also shear in the mode comprising the outer load engaged with leg pars contractilis.Measure the percentage elongation of the sample of the leg pars contractilis after clip, thus measure the percentage elongation of leg pars contractilis.
For each sample, 20 DEG C ± 2 DEG C, place 60 minutes under the environment of relative humidity 60% ± 5%RH, measure the length of leg pars contractilis along telescopic direction.Using this length as " leg pars contractilis length in its natural state ".
2nd, the length in the telescopic direction under this state (i.e. naturalness) of measurement target region and target area extend to the length in the telescopic direction when non-telescoping sheet material confirms the state less than the fold caused by elastic component by range estimation from naturalness.Using this length as " length of leg pars contractilis under elongation state ".
Carry out calculating by utilizing these measurement results with above-mentioned formula and measure percentage elongation.
(3) shape of crotch pars contractilis
Next, the shape of crotch pars contractilis 200 is described.Crotch pars contractilis 200 is configured to maintain smooth shape in the local of lower crotch region when wearing disposable diaper compared with other parts of absorber 40.Crotch pars contractilis 200 is configured to can be at least flexible on product length direction L or product width direction W.
Such as, crotch pars contractilis 200 and leg pars contractilis 75 are arranged independently of each other, in the overlapped position of crotch pars contractilis 200 and absorbent core 40a (in the present embodiment, position between the core covering 40b of back sheet 60a and coated absorbent core 40a) on, make the Length Contraction more than 60% on the product width direction W of the absorbent core 40a of this position.So, be configured with the portion retracts of absorbent core 40a by utilizing crotch pars contractilis 200 to make, absorbent core 40a shrinks, and is easy to keep smooth shape compared with the non-shrinking part of absorbent core 40a.
On the other hand, be positioned at and do not shrink under the effect of crotch pars contractilis 200 than the crotch pars contractilis 200 absorbent core 40a by the front waist area outside product length direction, rear waist area.Therefore, under the state being held in the waist of wearer, waistline utilizing magic tape, the crotch pars contractilis 200 being maintained smooth shape at the lower crotch of disposable diaper not excessively clings to the body, and its result, crotch pars contractilis 200 configures along health rightly.
In addition, when crotch pars contractilis 200 can stretch along product length direction L, front waist area 20 and rear waist area 30 are easy to erect under the effect of the contraction of crotch pars contractilis 200, can form smooth lower crotch region when wearing at the lower crotch of wearer along health.
Its result, because front waist area 20 and rear waist area 30 erect from crotch pars contractilis 200, therefore the stickiness of the laminating wearer of disposable diaper 10 improves.
That is, utilize the contraction of crotch pars contractilis 200, the mode of the lower crotch of wearer can be configured at the lower crotch region 25 of disposable diaper 10, stably dress disposable diaper 10.
And, crotch pars contractilis 200 also can with through the center O1 on the product length direction L of disposable diaper 10 forward side, waist area 20 and after side, waist area 30 extend mode formed.
In addition, the center O2 on the product length direction L of crotch pars contractilis 200 is configured in the position than the side, center O1 forward waist area 20 on the product length direction L of disposable diaper 10.
On the other hand, wearer movement situation (particularly, stand, when being seated or lifting lower limb under the attitude of recumbency) under, for the stroke (variable quantity of length) of the skin on the surface of the health of wearer, the stroke of dorsal part (buttocks) is larger than the stroke of veutro.
By the center O2 on the product length direction L of crotch pars contractilis 200 being configured at the position than the side, center O1 forward waist area 20 on the product length direction L of disposable diaper 10, the length on the product length direction L of the rear waist area 30 under the naturalness of disposable diaper 10 can be made longer than the length on the product length direction L of front waist area 20.Thus, even if when wearer movement, also can suppress the front waist area 20 of disposable diaper 10 and rear waist area 30 be subject to the motion of the skin of wearer impact and along product length direction L towards to move upward such situation.
Preferably, crotch pars contractilis 200 is made up of Stretchable sheet.
By utilizing Stretchable sheet to form crotch pars contractilis 200, the absorbent core 40a being configured with the region of Stretchable sheet is shunk equably, more easily keeps smooth shape.In addition, Stretchable sheet such as can be made up of the Stretchable sheet identical with leg pars contractilis 75.
In addition, also can substituting this Stretchable sheet, forming crotch pars contractilis 200 by configuring many thread, the banded elastic components be made up of polyurethane elastomeric fiber, natural rubber.In this case, in order to utilize crotch pars contractilis 200 to make absorbent core 40a shrink equably, elastic component interval each other can be set to below 7mm, more preferably be set to below 5mm.In addition, in order to make absorbent core 40a shrink equably, preferably the difference at the interval between adjacent elastic component is set to below 2mm.
In addition, specifically, preferably, the percentage elongation of crotch pars contractilis 200 is more than 1.2 times, less than 1.8 times.In the present embodiment, the percentage elongation of crotch pars contractilis 200 is set to 1.4 times.The meaning of percentage elongation refers to that crotch pars contractilis 200 is in the upper degree of extending of telescopic direction (product length direction L), is defined as following.
The meaning of percentage elongation refers to that crotch pars contractilis 200 is in the upper degree of extending of telescopic direction (in the present embodiment, product length direction L), is defined as following.
Percentage elongation=(length in the telescopic direction under the at utmost elongation state of crotch pars contractilis 200)/(length in the telescopic direction under the naturalness of crotch pars contractilis 200)
In addition, the measurement of percentage elongation is identical with above-mentioned leg pars contractilis, omits the description.
By the percentage elongation of crotch pars contractilis 200 is set to more than 1.2 times less than 1.8 times, the flexible of the skin of wearer suitably can be followed.
Such as, if wearer takes to roll up so anteflexion posture on front side of health, then there is the position of extending 30% size relative to the state stretching health at the skin place of the buttocks side of wearer.
That is, if the percentage elongation of crotch pars contractilis 200 is set to and is less than 1.2 times, contraction under the naturalness of then crotch pars contractilis 200 is insufficient, compared with the situation of crotch pars contractilis 200 is not set, the contraction of the absorbent body area at the crotch place of disposable diaper 10 is less, becomes insufficient in the crotch of wearer to form smooth shape along the mode of health.
On the other hand, if the percentage elongation of crotch pars contractilis 200 is set to and is greater than 1.8 times, contraction on the shrinkage direction of then crotch pars contractilis 200 is oversize, therefore the region that there is crotch pars contractilis 200 is easy to become and the state be close to more compared with health, and disposable diaper 10 is easy to depart to the below of wearer.
In addition, can be configured to, the amount of contraction on the product length direction L of crotch pars contractilis 200 is 2% ~ 8% of the length on the product length direction L of disposable diaper 10.
In addition, amount of contraction be stretched to that fold fully diminishes, the surface of sample is close to the length " b (mm) " under level and smooth state and the difference towards upper length " a (mm) " of the telescopic direction along sample under naturalness, can be calculated by (b-a).
The present inventor has confirmed: if the amount of contraction on the product length direction L of crotch pars contractilis 200 is set to 2% ~ 8% of the length on the product length direction L of disposable diaper 10, then be worn in the process of wearer by disposable diaper 10, crotch pars contractilis 200 is easy to aptly along the health of wearer.
Herein, if make the amount of contraction on the product length direction L of crotch pars contractilis 200 be greater than 8%, then crotch pars contractilis 200 exceedingly reduces, curtailment on the product length direction L of disposable diaper 10, causes on the health that is difficult to disposable diaper 10 is through wearer or the health of disposable diaper 10 and wearer is exceedingly close at lower crotch region 25 place and easily departs from.
On the other hand, if make the amount of contraction on the product length direction L of crotch pars contractilis 200 be less than 2%, be then difficult to embody making disposable diaper 10 near the effect of the such crotch pars contractilis 200 of the health of wearer itself.
In addition, the center configuration on the product length direction L of crotch pars contractilis 200 is in the position than the side, forward waist area 20, center on the product length direction L of disposable diaper 10.In addition, crotch pars contractilis 200 configures in the mode at the center on the product length direction L of disposable diaper 10.
In this case, for the rigidity of other components of the rigidity and formation disposable diaper 10 of considering absorbent core 40a, the thickness of used elastic component, the pitch of configuration can be selected aptly, but preferably, when being naturalness (non-elongate state) making disposable diaper 10 main body, the whole region of side edge part on the product width direction W of absorbent core 40a becomes contracted state.
In addition, breach 115 (breach 125) is formed with at the lower crotch region 25 of absorber 40.Breach 115 and breach 125 are the regions that there is not the absorbent core 40a forming absorber 40.In the present embodiment, breach 115 and breach 125 are equivalent to the weight per unit area of the absorbent core 40a low rigidity portion lower than the weight per unit area of other parts of absorbent core 40a.In addition, also can replace forming breach 115 and breach 125, and the weight per unit area region of breach 115 and breach 125 being set to absorbent core 40a is lower than the weight per unit area of other parts of absorbent core 40a.
Breach 115 and breach 125 exist along the edge on the product length direction L of crotch pars contractilis 200.In addition, preferably, even if be formed with breach 115 and breach 125, the absorbent core 40a being positioned at front waist area 20 and rear waist area 30 and the absorbent core 40a being positioned at lower crotch region 25 are not completely severed, particularly continuous on product width direction.
Go along with to the outside on the W of product width direction, the length (naturalness of disposable diaper 10) on the product length direction L of breach 115 and breach 125 is elongated.Utilize such shape, the outside on the product width direction W of absorbent core 40a is more easily shunk, and is therefore more easily formed smooth " bottom ".And, be positioned at and erect from " bottom " than the absorbent core 40a of breach 125 near rear waist area 30 near the absorbent core 40a of the position of front waist area 20 and being positioned at than breach 115, be easy to the curved of the health (abdominal part and buttocks) along wearer, therefore, it is possible to make the bodily form of shape closer to wearer of disposable diaper self.
In addition, the edge near the front waist area 20 (rear waist area 30) of breach 115 (breach 125) is arc-shaped.The edge of breach 115 (breach 125) be circular arc be centrally located at the shape more such than the position of waist area 30 (front waist area 20) rearward, this edge.Utilize such shape, be easy to more easily and produce the distortion of the curve of the health along wearer more significantly.
Width on the product width direction W of crotch pars contractilis 200 is more than 1/2 of the width on the product width direction W that there is the absorbent core 40a in the region of crotch pars contractilis of absorbent core 40a.
Thus, more than one fixed width is shunk at the position being configured with absorbent core 40a by utilizing crotch pars contractilis 200 to make, and absorbent core 40a shrinks, and absorbent core 40a to carry in the mode of the health of wearer.
By realize in lower gear region such absorbent core 40a on carry, the gap between disposable diaper 10 and wearer can be reduced.Width on the product width direction W of crotch pars contractilis 200 is more than 60% of width on the product width direction W of absorber 40 (absorbent core 40a), more preferably more than 80% when, the gap between disposable diaper 10 and wearer can be reduced further.
Further, if the width of crotch pars contractilis 200 is narrow compared with the width of absorbent core 40a, be then difficult to obtain the above-mentioned effect that will absorbent core 40a puies forward.On the other hand, if the width of crotch pars contractilis 200 is wide compared with the width of absorbent core 40a, then under the position not configuring absorbent core 40a is than the position being configured with absorbent core 40a more contracted state, dress disposable diaper 10.Thus, when formation does not configure the component overlap at the position of absorbent core 40a, crotch pars contractilis 200 is hardening, compromises the wearing feeling of disposable diaper 10.
Such as, preferably the size (under elongation state) that there is the position that width is the narrowest in the region of crotch pars contractilis of absorbent core 40a for 120mm when, the width of crotch pars contractilis 200 is 60mm ~ 110mm.It is further preferred that the width of crotch pars contractilis 200 is preferably 90mm ~ 110mm.
Preferably, the position of side 10mm ~ 60mm more forward than product length direction centrage is located at the narrowest position of the width on the product width direction W of absorbent core 40a.Preferably, the position of side 20mm ~ 40mm more forward than product length direction centrage is located at the narrowest position of the width on the product width direction W of absorbent core 40a.Preferably, crotch pars contractilis 200 is formed to pass the narrowest position of width on the product width direction W of absorbent core 40a.
The huckle of the left and right of wearer is positioned at the position of side more forward than the center on the fore-and-aft direction of the health of wearer in position the most close mutually.Thus, under the effect of the contractility of crotch pars contractilis 200, position that can be the narrowest by the width on the product width direction W of absorbent core 40a is configured at the mutually close position of the huckle of the left and right of wearer energetically.In other words, even if mother etc. wear the para-position that auxiliary does not carry out absorbent core 40a, the para-position of absorbent core 40a is also carried out automatically.
(4) manufacture method of disposable diaper
Next, an example of the manufacture method of the absorbent commodity of present embodiment is described.In addition, for unaccounted manufacture method in the present embodiment, existing method can be adopted.In addition, the manufacture method below illustrated is an example, also can be manufactured by other manufacture methods.The manufacture method of absorbent commodity at least comprises constituent part formation process, constituent part loads operation, lower limb encloses formation process and cut off operation.
In constituent part formation process, form the constituent part for forming absorbent commodity.Specifically, such as, stacked absorbing material thus coform absorbent body 40.
In constituent part mounting operation, knitting sheet for what form back sheet, load the Stretchable sheet for forming leg pars contractilis 75, for form positive dough sheet knit sheet etc. other knit the constituent parts for forming disposable diaper 10 such as sheet, leakproof sheet material, absorber, leg pars contractilis 75, buttocks pars contractilis 77.
Enclose in formation process at lower limb, cut positive dough sheet 50, outer load 60 and back sheet 60a.Thus, the leading section 77F of buttocks pars contractilis 77 is cut off, and the leg opening part 35 that the lower limb that formation is configured at wearer encloses.
In cut-out operation, the continuum being configured with positive dough sheet 50, back sheet 60a, absorber 40 etc. is cut into the size of a product along product width direction W.Thus, disposable diaper 10 is manufactured.
(5) other embodiment
As described above, disclose content of the present invention by embodiments of the present invention, but form the discussion of a part of the disclosure and accompanying drawing and should not be construed as the present invention is limited.For those skilled in the art, various alternate embodiments, embodiment and application technology can be specified from the disclosure.
Leg pars contractilis 75 both can align on product width direction with the bonding part of leg side rivel, also can be configured by the position inside product width direction in the bonding part than leg side rivel.The elastic component forming leg pars contractilis 75 and buttocks pars contractilis 77 both can be 1, also can be more than 2.
In addition, in the above-described embodiment, be illustrated for disposable wearing article, but the present invention also can be applied to Breeches type disposable diaper.About by engaging the pants-shaped diaper for the formation of the edge, the left and right sides of the outer layer sheet of front waist area and rear waist area with waistline peristome and a pair leg opening part, the outer layer sheet of front waist area and rear waist area has the flexible member that can shrink along product width direction W and extend, and by being shunk, disposable diaper is held in the waistline of wearer.That is, the scope that the edge, the left and right sides extended along product length direction L engages becomes waistline maintaining part.
So, the present invention comprises the various embodiments etc. do not recorded herein certainly.Thus, according to above-mentioned explanation, the invention specified features of technical scope of the present invention only involved by appropriate patent claims limit.
In addition, the full content of No. 2012-259161, Japan's patent application (application on November 27th, 2012) enrolls present specification as reference.
utilizability in industry
A kind of disposable diaper that can prevent end, the product width direction crimping when dressing while covering buttocks rightly can be provided.
description of reference numerals
10: disposable diaper; 20: front waist area; 25: lower crotch region; 30: rear waist area; 35: leg opening part; 35F: front side leg opening part; 35R: rear side leg opening part; 35I: medial end; 40: absorber; 40a: absorbent core; 40b: core covering; 50: positive dough sheet; 60: outer load; 60a: back sheet; 70: flank; 75: leg pars contractilis; 77: buttocks pars contractilis; 77F: leading section; 80: leg side rivel; 81: elastic component; 85: waistline pars contractilis; 90: magic tape; 91: substrate sheets; 92: hook tabs; 95: target portion; 115: breach; 125: breach; 200: crotch pars contractilis; L: product length direction; W: product width direction.

Claims (12)

1. a disposable diaper, wherein,
This disposable diaper has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area,
This disposable diaper has from described front waist area towards the product length direction of described rear waist area and the product width direction orthogonal with described product length direction,
This disposable diaper possesses: absorber, its through described lower crotch region and to described front waist area and described after at least one in waist area extend;
Flank, its through described front waist area, described lower crotch region and described after waist area, and to be configured at than described absorber by the position outside described product width direction; And
A pair magic tape, it extends outside product width direction from the described rear waist area of described flank, and is fixed on described front waist area,
Have at described flank: leg opening part, it is to the central concave on the described product width direction of described absorber; And leg pars contractilis, it is configured at than described leg opening part by the position inside product width direction, and flexible on described product length direction,
Described leg opening part has: rear side leg opening part, and it is positioned at the position than side rearward, the center on the described product length direction of described leg opening part; And front side leg opening part, it is positioned at the position of side more forward than the center on the described product length direction of described leg opening part,
Described rear side leg opening part and the area by the center on described product width direction and between the straight line parallel with product length direction are greater than described front side leg opening part and area between the straight line extended by the center on described product width direction and along described product length direction
Be configured with a pair buttocks pars contractilis than described leg pars contractilis by the position outside two on described product width direction, this pair buttocks pars contractilis be configured to through described lower crotch region and described after waist area, and flexible along described product length direction,
Distance between the product width direction outboard end of described magic tape and described buttocks pars contractilis on described product width direction is shorter than the distance between the center, product width direction of described disposable diaper and the described product width direction outboard end of described leg pars contractilis on described product width direction.
2. disposable diaper according to claim 1, wherein,
This disposable diaper also possesses the target portion for fixing described magic tape in described front waist area,
Described magic tape possesses the engaging portion being fixed on described target portion,
Distance between the product width direction outboard end of the described engaging portion of described magic tape and described buttocks pars contractilis on described product width direction is shorter than the distance between the described line of production medial end of described target portion and the described product width direction outboard end of described leg pars contractilis on described product width direction, or shorter than the distance between the center, product width direction of described disposable diaper and the described product width direction outboard end of described leg pars contractilis on described product width direction.
3. disposable diaper according to claim 1 and 2, wherein,
Distance between described a pair buttocks pars contractilis is 150% ~ 200% of the length on the described product width direction of described absorber.
4. disposable diaper according to claim 3, wherein,
Distance between described a pair buttocks pars contractilis is 200mm ~ 240mm.
5. the disposable diaper according to any one of Claims 1 to 4, wherein,
The position be centrally located at than side rearward, the center on the described product length direction of described leg pars contractilis on the described product length direction of described buttocks pars contractilis.
6. the disposable diaper according to any one of Claims 1 to 5, wherein,
Described buttocks pars contractilis is along the linearly configuration in described product length direction.
7. the disposable diaper according to any one of claim 1 ~ 6, wherein,
The position being centrally located at side more forward than the center on the described product length direction of described disposable diaper on center on the described product length direction of described leg pars contractilis and the described product length direction of described leg opening part.
8. the disposable diaper according to any one of claim 1 ~ 7, wherein,
Distance between described buttocks pars contractilis and described leg pars contractilis on described product width direction is 10mm ~ 30mm.
9. the disposable diaper according to any one of claim 1 ~ 8, wherein,
Described leg opening part is the convex protruded inside described product width direction outside described product width direction,
Described leg pars contractilis and shorter than the distance between described leg pars contractilis and described buttocks pars contractilis in the distance of described leg opening part place between the medial end by the position of inner side, product width direction, and be below 15mm.
10. disposable diaper according to claim 9, wherein,
The medial end of described leg opening part is positioned on centrage, and this centrage is by the center between described leg pars contractilis and described buttocks pars contractilis on product width direction and along described product length direction.
11. disposable diapers according to any one of claim 1 ~ 10, wherein,
Side leg opening part is formed with protuberance in the rear, and this protuberance is in the convex protruded outside described product width direction.
12. disposable diapers according to any one of claim 1 ~ 11, wherein,
In described front side, leg opening part is formed with recess, and this recess is in the shape caved in inside described product width direction.
CN201380061623.3A 2012-11-27 2013-11-27 Disposable diaper Active CN104822348B (en)

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JP2012-259161 2012-11-27
JP2012259161A JP6118083B2 (en) 2012-11-27 2012-11-27 Disposable diapers
PCT/JP2013/081854 WO2014084230A1 (en) 2012-11-27 2013-11-27 Disposable diaper

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BR112015012214A2 (en) 2020-01-07
JP6118083B2 (en) 2017-04-19

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