CN104812344A - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
CN104812344A
CN104812344A CN201380058343.7A CN201380058343A CN104812344A CN 104812344 A CN104812344 A CN 104812344A CN 201380058343 A CN201380058343 A CN 201380058343A CN 104812344 A CN104812344 A CN 104812344A
Authority
CN
China
Prior art keywords
disposable diaper
pars contractilis
product
waist area
crotch
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
CN201380058343.7A
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Chinese (zh)
Other versions
CN104812344B (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 CN104812344A publication Critical patent/CN104812344A/en
Application granted granted Critical
Publication of CN104812344B publication Critical patent/CN104812344B/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 articles specially adapted to be worn around the waist, e.g. diapers
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium

Abstract

This disposable diaper (10) has a crotch stretch section (200) formed at a position at which the crotch stretch section (200) overlaps an absorbent body (40) in a crotch region (25). The crotch stretch section (200) is formed so as to straddle an imaginary product centerline (VLT) and overlaps a fold-in-half line (FL). An imaginary crotch centerline (VLC) is provided forwards of the imaginary product centerline (VLT), and the fold-in-half line (FL) is provided rearwards of the imaginary product centerline (VLT).

Description

Disposable diaper
Technical field
The present invention relates to a kind of disposable diaper.
Background technology
Conventionally, there is known a kind of disposable diaper, it has front waist area, rear waist area and lower crotch region, and it is formed with pair of leg and encloses peristome, and possess through lower crotch region forward waist area and after waist area extend absorber.
In such disposable diaper, in order to prevent leakage of exudates and realize good wearing feeling and carried out various design.Such as, be known to such structure (such as, patent documentation 1): absorber is divided into three parts on product length direction, and the outside on the product width direction of absorber is in the elastic component (such as leg rivel or three-dimensional rivel) of elongation state along the configuration of product length direction.
Adopt such disposable diaper, narrower intervals between the absorber that divided tripartite absorber is adjacent when wearing and close contact, thus make disposable diaper fit in wearer, and therefore, gap when suppressing to wear disposable diaper between disposable diaper and wearer.
In addition, when being sealing in packaging by disposable diaper, the mode becoming inner side with skin contact face folds disposable diaper (such as, patent documentation 2).
prior art document
patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2004-141270 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2005-329106 publication
Summary of the invention
In above-mentioned disposable diaper, under the effect of the contractility of the elastic component of leg rivel or three-dimensional rivel etc., disposable diaper is overall on product width direction to be shunk along product length direction, and wearer is close to by disposable diaper.As a result, easily retreat to in-leg direction in the front waist area of disposable diaper and rear waist area.Particularly, after disposable diaper absorbs Excreta, the downward crotch direction in the front waist area of disposable diaper and rear waist area is departed from, thus easy enclosing at the lower limb of wearer produces unnecessary gap between disposable diaper.
In addition, disposable diaper is with folded and be sealing in packaging by the state compressed, and constant pressure puts on disposable diaper.In addition, with skin contact face become inner side mode fold disposable diaper.Thus, the folding line with the convex protruded towards the direction leaving wearer is formed at disposable diaper.Due to such folding line, between disposable diaper and wearer, form gap, and growth encourage produces gap when wearing disposable diaper between disposable diaper and wearer.In order to suppress to produce gap due to folding line between disposable diaper and wearer, also can consider the contractility strengthening elastic component, but the front waist area of disposable diaper and rear waist area become large towards departing from of in-leg direction.
Therefore, the present invention completes to solve above-mentioned problem, even if its object is to provide a kind of when disposable diaper is sealing in packaging with folding state, also can suppress between disposable diaper and wearer, to produce gap when wearing disposable diaper, and the disposable diaper that the front waist area of disposable diaper and rear waist area can be suppressed to depart from towards in-leg direction.
The disposable diaper of the 1st technical characteristic, it has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area, and 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.Disposable diaper possesses: absorber, its through described lower crotch region and to described front waist area and described after in waist area at least any one extends; And crotch pars contractilis, it is formed at position overlapping with described absorber in described lower crotch region, and has retractility.Under the elongation state of described disposable diaper, described crotch pars contractilis is by the center on the described product length direction of described disposable diaper, and be formed to pass the imaginary product center line extended along described product width direction, and, under the naturalness of described disposable diaper, in order to be piled up in described front waist area and described rear waist area, described crotch pars contractilis is overlapping in described lower crotch region with the broken line extended along described product width direction.When described disposable diaper is in elongation state, the imaginary crotch centrage extended by the center on the described product length direction of described crotch pars contractilis and along described product width direction is located at the position of side more forward than described imaginary product center line, and described broken line is located at the position than described imaginary product center line side rearward on described product length direction.
Accompanying drawing explanation
Fig. 1 is the expansion top view of the disposable diaper 10 of the 1st embodiment.
Fig. 2 is the sectional view along the F1-F1 line shown in Fig. 1 of disposable diaper 10.
Fig. 3 is the sectional view along the F2-F2 line shown in Fig. 1 of disposable diaper 10.
Fig. 4 is the sectional view of the disposable diaper 10 of variation 1.
Fig. 5 is the expansion top view of the disposable diaper 10 of variation 2.
Detailed description of the invention
Below, be described with reference to the disposable diaper of accompanying drawing to embodiments 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.
[summary of embodiment]
The disposable diaper of embodiment has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area, and 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.Disposable diaper possesses: absorber, its through described lower crotch region and to described front waist area and described after in waist area at least any one extends; And crotch pars contractilis, it is formed at position overlapping with described absorber in described lower crotch region, and has retractility.Under the elongation state of described disposable diaper, described crotch pars contractilis is by the center on the described product length direction of described disposable diaper, and be formed to pass the imaginary product center line extended along described product width direction, and, under the naturalness of described disposable diaper, described crotch pars contractilis is overlapping in described lower crotch region with the broken line extended along described product width direction, aligns to make the height of the rear end of the height of the anterior end of described front waist area and described rear waist area.When described disposable diaper is in elongation state, the imaginary crotch centrage extended by the center on the described product length direction of described crotch pars contractilis and along described product width direction is located at the position of side more forward than described imaginary product center line, and described broken line is located at the position than described imaginary product center line side rearward on described product length direction.
In embodiments, overlapping with absorber in lower crotch region position forms crotch pars contractilis.In addition, crotch pars contractilis is formed to pass imaginary product center line, and overlapping with broken line.Therefore, even if when inhibit the gap between disposable diaper and wearer produced when wearing disposable diaper under the effect of the contractility of the elastic components such as leg rivel or three-dimensional rivel, also on absorber (that is, the position that the rigidity at other positions of ratio of rigidity is high), horizontal wrinkle is not randomly formed.In addition, crotch pars contractilis has retractility, and is formed at the position overlapping with absorber.Thus, under the state that front waist area and rear waist area are held in the health of wearer, under the effect of the contraction of crotch pars contractilis, comprise the lower crotch region of broken line to carry in the mode of the health of wearer together with absorber.Therefore, at broken line place, inhibit the gap between disposable diaper 10 and wearer.
So, even if when disposable diaper is sealing in packaging with folding state, also can suppress between disposable diaper and wearer, to produce gap when wearing disposable diaper, and the front waist area of disposable diaper and rear waist area can be suppressed to depart from towards in-leg direction.
In embodiments, imaginary crotch centrage is located at the position of side more forward than imaginary product center line, and broken line is located at the position than imaginary product center line side rearward.That is, crotch pars contractilis is located at the position of the front side of deflection disposable diaper on product length direction.Therefore, under the state that disposable diaper is worn on wearer, be easy to the height of the height of the anterior end of front waist area with the rear end of rear waist area to align, and configure crotch pars contractilis in the position that the lower crotch region with wearer is corresponding.
[the 1st embodiment]
(1) schematic configuration of disposable diaper
Below, the schematic configuration of disposable diaper is described.Fig. 1 is the expansion top view of the disposable diaper 10 of the 1st embodiment.Fig. 2 is the sectional view along the F1-F1 line shown in Fig. 1 of disposable diaper 10.Fig. 3 is the sectional view along the F2-F2 line shown in Fig. 1 of disposable diaper 10.Expansion top view shown in Fig. 1 is the figure that the positive dough sheet 50, flank 70 etc. making the elastic component 71 of leg pars contractilis 75 and leg side rivel 80 etc. 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, be formed with pair of leg at disposable diaper 10 and enclose peristome 35.Leg-openings portion 35 is located at the side end on the product width direction W of disposable diaper 10, and is the part of enclosing configuration under the state being dressed in wearer at disposable diaper 10 along the lower limb of wearer.
In the 1st 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 to possess through lower crotch region 25 waist area 20 forward 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 is identical with the absorbent core used in disposable diaper in the past, by absorbable polymer (SAP; Super Absorbent Polymer) and predetermined fiber formation.Predetermined fiber is such as paper pulp fiber or thermoplastic fibre.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.
Side edge part on the product width direction W of absorber 40 is respectively equipped with a pair flank 70.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.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, thus disposable diaper 10 is held in the health of wearer.
Target portion 95 is configured at 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 1st embodiment, form waistline maintaining part by front waist area 20, rear waist area 30 and magic tape 90.The waistline maintaining part of rear waist area 30 is positions that the region being provided with fastened component of self-adhesion cingulum 90 starts to extend along product width direction W.The waistline maintaining part of front waist area 20 is the positions starting from the region being provided with target portion 95 to extend along product width direction W.
In addition, disposable diaper 10 has and is formed at the position overlapping with absorber 40 in lower crotch region 25 and the crotch pars contractilis 200 with retractility.In addition, be described in detail in the aftermentioned structure to crotch pars contractilis 200.
Be provided with in the face side (positive dough sheet 50 side) of absorber 40 and be formed at around leg-openings portion 35 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-openings portion 35 stretch along product length direction L, both can configure leg pars contractilis 75 along leg-openings portion 35, under the state that also can tilt relative to leg-openings portion 35 in a part for leg pars contractilis 75, configure leg pars contractilis 75.
In addition, leg pars contractilis 75 is in fact along the part that product length direction L shrinks under the effect of Stretchable sheet etc., and is the concept except be configured with the part of Stretchable sheet under the state not given play to contractility except.In addition, be described in detail in the aftermentioned structure to leg pars contractilis 75.
< leg side rivel >
The 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 W of flank 70, and for being configured at the flexible rivel than the erecting of leg pars contractilis 75 position in the inner part on the W of product width direction.Leg side rivel 80 is configured on the W of product width direction than leg pars contractilis 75 position in the inner part.Leg side rivel 80 can adopt known structure, specifically, can by with flank 70 independently other sheet material form.
The medial end of flank 70 on the W of product width direction turns back towards positive dough sheet 50 side, and is laminated into two-layer.Between this two-layer flank 70, be provided with elastic component 71 (with reference to Fig. 2) with the state of having extended on the L of product length direction.This flank 70 and elastic component 71 is utilized to form leg side rivel 80.
Leg side rivel 80 has the bonding part 81 engaged with positive dough sheet 50 or back sheet 60a and the free end portion 82 being configured with elastic component.Under comprising in free end portion 82, the middle body of the product length direction L of crotch region 25 shrinks along product length direction L under the effect of elastic component 71, thus forms contraction flow region 84.Leg side rivel 80 erects as base end part using bonding part 81 when wearing, and the contraction flow region 84 of free end portion 82 contacts with the skin of wearer as apex.That is, bonding part becomes the base end part erected of leg side pars contractilis.
In addition, contraction flow region 84 is in fact along the part that product length direction L shrinks under the effect of elastic component 71, and is the concept except be configured with the part of elastic component 71 under the state not given play to contractility except.In addition, mark oblique line to represent (with reference to Fig. 1) to the bonding part 81 engaged at leg side rivel 80 place flank 70 and positive dough sheet 50 (or back sheet 60a etc.).
Bonding part 81 is provided with multiple, and the 1st bonding part 81A is configured at than contraction flow region 84 position in the outer part on the L of product length direction, and the 2nd bonding part 81B is configured on the W of product width direction than contraction flow region 84 position in the outer part.Therefore, leg side rivel 80 is configured to comprise middle body on the product length direction L of lower crotch region 25 to edge-on of wearer.
In the bonding part 81 of leg side rivel 80, the 1st bonding part 81A be configured at than contraction flow region 84 position in the outer part on the L of product length direction engages with positive dough sheet 50.
In the bonding part 81 of leg side rivel 80, the 2nd bonding part 81B be configured at than contraction flow region 84 position in the outer part on the W of product width direction is configured between crotch pars contractilis 200 and leg pars contractilis 75 on the W of product width direction.The whole length of 2nd bonding part 81B on the L of product length direction engages with back sheet 60a (and a part on the L of product length direction engages with outer mounting 60).In addition, back sheet 60a is configured between absorber 40 and outer load 60, and plays function as leakage prevention sheet.
In addition, the bonding part 81 of leg side rivel 80 can adopt various structure.Bonding part 81 both can be such as that from lower crotch region 25, waist area 20 and rear waist area 30 extend and the part engaged with positive dough sheet 50 forward on the L of product length direction, also can be than the part that absorbent core 40a position in the outer part engages with back sheet 60a, outer load 60 on the W of product width direction, thus become the base end part erected.
In addition, as long as leg side rivel 80 is configured at the rivel than the erecting of leg pars contractilis 75 position in the inner part on the W of product width direction, be not limited to said structure, certainly can adopt the structure of known leg side rivel.
< waistline pars contractilis >
The waistline pars contractilis 85 that can stretch on the W of product width direction is provided with between a pair magic tape on the W of product width direction.Waistline pars contractilis 85 makes the region between magic tape shrink on the W of product width direction.
In the 1st 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 fitting in health corporally to the health of wearer.In addition, waistline pars contractilis 85 is formed by utilizing the material that contracting width is less, can suppress when disposable diaper extends on the W of product width direction the product length direction L of disposable diaper 10 shrinks, and suppress at the waistline place of wearer disposable diaper 10 to be retreated to crotch side.
In the 1st 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 1st embodiment, waistline pars contractilis 85 is configured between outer load 60 and back sheet 60a.But, when be configured to core covering 40b on the L of product length direction extend to than absorbent core 40a position in the outer part, waistline pars contractilis 85 also can be configured between core covering 40b and back sheet 60a (or outer load 60).The position of waistline pars contractilis 85 does not limit especially.In addition, when being in the region not configuring absorber 40, also waistline pars contractilis 85 can be configured between flank 70 and back sheet 60a (or outer load 60).
In addition, the waistline pars contractilis of the 1st embodiment is formed in mode flexible on the W of product width direction, but waistline pars contractilis 85 also can be formed in mode flexible on product width direction W and product length direction L.
The breach > of < absorber
The weight per unit area at position in absorber 40, that be located at rear waist area 30 is lower than the weight per unit area at the position in the region be located at beyond rear waist area 30.Or absorber 40 has the breach 110 for the formation of the Low rigidity region that there is not absorbent core 40a.Breach 110 is formed at the central authorities on the product width direction W of the rear end of absorber 40.Width on the product width direction W of breach 110 is in the wedge shape of going towards front side to diminish gradually.In addition, absorbent core 40a's and breach 110 between boundary formed with the circular arc protruded towards the center of product width direction W.Than the trapezoidal shape that breach 110 absorber 40 in the outer part protrudes in the end towards side, rear waist area on the W of product width direction.
A part for breach 110 is configured to when overlooking disposable diaper overlapping with waistline pars contractilis 85.In addition, in the 1st embodiment, waistline pars contractilis 85 is configured to overlapping with a part for breach 110, but it is overlapping with breach 110 also can be configured to whole waistline pars contractilis 85.
By forming such breach 110, do not hinder the flexible of waistline pars contractilis 85, even if waistline pars contractilis 85 shrinks, because breach 110 narrows, than the narrower intervals between breach 110 absorber in the outer part on the W of product width direction, therefore absorber 40 be also difficult to expect outside shape protuberance.In addition, prevent leakage of exudates if consider, then the width of breach 110 is preferably narrower than the width of waistline pars contractilis 85.
In addition, if absorber 40 shrinks under the effect of waistline pars contractilis 85 on product width direction W, than the narrower intervals between breach 110 absorber in the outer part on the W of product width direction, position near the end of the then side, rear waist area 30 of breach 110 is than the central authorities of the position near lower crotch region 25 to a greater degree on the W of product width direction, therefore produce the difference of the amount of contraction on the W of product width direction between the position after near the position of side, waist area 30 and lower crotch region 25, rear waist area 30 erects.
That is, owing to having the breach 110 of waistline the pars contractilis 85 and wedge-like can stretched on the W of product width direction, therefore when dressing disposable diaper 10, the cup-shaped bloated at side, non-skin face formation disposable diaper 10 is easy to.
In addition, in the 1st embodiment, at breach 110 there is not absorbent core 40a in place, waistline pars contractilis 85 exists in the mode overlapping with breach 110, position near the end of the side, rear waist area 30 therefore on the L of product length direction is than the central authorities of end position to a greater degree on the W of product width direction of absorbent core 40a, erecting of rear waist area 30 becomes more remarkable, therefore, it is possible to more stably form cup-shaped.
In the 1st embodiment, because waistline pars contractilis 85 is present in the scope of the lateral margin exceeded on the product width direction W of absorbent core 40a, therefore, it is possible to make disposable diaper 10 form cup-shaped, and near the end side that can make the side, rear waist area 30 on the L of product length direction the absorbent core 40a of position energetically along the health of wearer.And, waistline pars contractilis 85 and breach 110 be present in the region starting to extend along product width direction W from a pair magic tape 90 at least partially.Therefore, even if when disposable diaper 10 being underlayed and dressing disposable diaper 10 under the state making wearer's recumbency, be not laid down under the health of wearer with the waistline pars contractilis 85 that the mode exceeding the lateral margin on the product width direction W of absorbent core 40a exists yet.Thus, by stretching magic tape 90, the lateral margin of waistline pars contractilis 85 is extended, be easy to make position near the waist side of cup-shaped more reliably along health.
In the 1st embodiment, on the W of product width direction than breach 110 absorbent core 40a in the outer part in the convex protruded towards side, rear waist area.Therefore, be easy to the cup-shaped bloated at side, non-skin face formation disposable diaper 10 as described above, and the surface area of absorbent core 40a is maintained, therefore, it is possible to prevent Excreta from the end leakage of absorbent core 40a.
In the 1st embodiment, breach 110 in wedge-like, absorbent core 40a's and breach 110 between boundary be towards the outstanding circular arc of lower crotch region 25.In addition, the radius of circular arc is 50mm ~ 200mm.Therefore, the width on the product width direction W of breach 110 non-linearly increases along with going towards rear side on the L of product length direction, and erecting of rear waist area 30 becomes more remarkable, is therefore easy to more stably form cup-shaped.And, absorbent core 40a's and breach 110 between boundary be the circular arc protruded towards lower crotch region 25, therefore after under the effect of the contraction of breach 110, waist area 30 becomes mellow and full cup-shaped, and becomes the shape of the mellow and full buttocks be easy to along wearer.
In addition, by forming breach 110, the outside on the product width direction W of breach 110, the rear end of absorber 40 has the convex protruded towards rear side.The shape of such absorber 40 has following effect: people is remembered and puts buttocks, and therefore user is easier aims at diaper for position accurately wearer.
The bending stiffness > of < absorber
The bending stiffness of the 1st embodiment is the rigidity value based on obtaining according to Taibo method (Japanese Industrial Standards JIS P8125), measures by the following method.First, under the state launching disposable diaper, extract the sample (such as absorber) of the measuring object part of bending stiffness.Sample is the size of length 38mm measuring object part made on the length 70mm × product length direction on product width direction.When comprising telescopic resilience component in the sample to which, remove elastic component in advance.In addition, the testing machine measuring rigidity value uses (Co., Ltd.) day intrinsic safety field essence mechanism to make made Taber Stiffness testing machine (Taber Stiffness Tester).In addition, sample size is 10, measures each sample, using its meansigma methods as rigidity value.
The process measured is as following (a) ~ (e).
A () measures the thickness (A) of the sample extracted.
(b) then, with the degree clamped sample of chuck (downside) central contact with testing machine.
C the summation in the gap, left and right between backing roll and sample is adjusted to (A) × 0.80 (mm) by ().
D () suitably selects auxiliary counterweight, instruction load scale is entered in the scope of 15% ~ 85% of maximum scale.
E () makes sample both direction rotation to the left and right, make it stop, reading the scale of testing machine at 15 degree of points supporting groove consistent with the center rag of balancing point.Numerical value on the left of scale is set to (B), the numerical value on the right side of scale is set to (C).
Following formula is utilized to try to achieve rigidity value.
Formula: rigidity value (mNm)=(((B)+(C))/2) × (auxiliary counterweight coefficient) × 9.81 × 10 -2
In addition, when the width of test piece cannot extract 38mm, the moment of flexure that 38mm is wide is scaled.
The rigidity value measured like this is higher, then bending stiffness is higher, and rigidity value is lower, then bending stiffness is lower.
The structure > of < magic tape and target portion
Magic tape 90 is installed on the position corresponding with rear waist area 30 of flank 70.Magic tape 90 comprises: substrate sheets 91, and itself and flank 70 are connected; And hook tabs 92, it is provided with multiple clamping hooked as fastened component (not shown), and is fixed on substrate sheets 91.Hook tabs 92 is the positions being provided with fastened component, above-mentioned waistline maintaining part be from hook tabs 92 start along product width direction W extend position.
Hook tabs 92 is fixed on substrate sheets 91, is specifically engaged in substrate sheets 91.Preferably, the joint between hook tabs 92 and substrate sheets 91 can not make the rigidity of magic tape 90 be elevated to more than required degree.Specifically, preferably, the hot-melt adhesive that hook tabs 92 and substrate sheets 91 utilize point-like, wire or helical form to apply like that discontinuously engages.In addition, hook tabs 92 and substrate sheets 91 also can be engaged by heat-sealing etc.
Substrate sheets 91 is formed by 1 non-woven fabrics or is made up of the non-woven fabrics of multiple overlaps of more than two.Can use and utilize the non-woven fabrics of the manufacture method manufacture such as spunbond (SB) or spunbond-melt blown-spunbond (SMS) to be used as substrate sheets 91.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 of the clamping hooked 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 installed on target portion.
And as target portion 95, can use fluffy non-woven fabrics, this non-woven fabrics is by preventing the fluffing of nonwoven surface by its a part of embossing.
In addition, also can by being formed the outer load 60 of disposable diaper by non-woven fabrics, the pattern of the installation site representing connecting band 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, thus makes target portion.
(2) leg pars contractilis
Below leg pars contractilis 75 is described.
Leg pars contractilis 75 is configured than the leg-openings portion 35 of absorber 40 position in the outer part on the W of product width direction along being located at, and is formed in the mode can stretched on the L of product length direction.Leg pars contractilis 75 position had on the W of product width direction is positioned at the width inner end portion 75I of inner side in lower crotch region 25.Leg-openings portion 35 and leg pars contractilis 75, particularly at rear waist area place, extend towards the outside on the W of product width direction along with going towards the outside on the L of product length direction from lower crotch region 25.In addition, the width inner end portion 75I of leg pars contractilis 75 both can configure continuously on the L of product length direction, also can be discontinuous on the L of product length direction.In the 1st embodiment, the position that the position on the product width direction W in leg-openings portion 35 is positioned at inner side in lower crotch region 25 is consistent with the width inner end portion 75I of leg pars contractilis 75, but neither be unanimously necessary.
The leg pars contractilis 75 of the 1st embodiment is made up of Stretchable sheet.Such as, as this Stretchable sheet, can use and thermoplastic elastomer resin melting such to polyurethane, styrene be done the retractility film of film-like, the flexible nonwoven fabrics be made up of contractile fibre, paste on retractility film, flexible nonwoven fabrics by partial cutoff or the crisp non-extensible sheet material that weakens and the composite sheet etc. obtained.
In addition, also by configuring 1 or many thread, the banded elastic components be made up of spandex, natural rubber carry out this Stretchable sheet alternative, thus leg pars contractilis 75 can be formed.
Leg pars contractilis 75 is configured between flank 70 and outer load 60.Or be provided with the position of 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 Stretchable sheet (width on the product width direction W under the naturalness of disposable diaper 10) forming leg pars contractilis 75 is at least preferably 5mm ~ 45mm at its width of lower crotch region 25 place, is more preferably 12.5mm ~ 35mm.When being less than 5mm, do not find following effect, namely by enclosing with the lower limb of face along wearer in fact, the power of tying tight is not concentrated partly, thus reduce flexible member to the load of skin, if more than 45mm, then compared with the length on the product width direction W of whole disposable diaper, become excessive along the region that lower limb encloses, Stretchable sheet is easily involved in bodyside or the clot youngster of wearer.
The percentage elongation of leg pars contractilis 75 is preferably 1.5 times ~ 2.2 times.In the 1st embodiment, the percentage elongation of leg pars contractilis 75 is set to 1.8 times ~ 2.0 times.In addition, the meaning of percentage elongation refers to the degree of the elongation of leg pars contractilis, 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 clip comprises the outer load engaged with leg pars contractilis.Measure the percentage elongation of the sample of the leg pars contractilis 75 after clip, thus measure the percentage elongation of leg pars contractilis 75.
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 " length under the naturalness of leg pars contractilis ".
2nd, the length in the telescopic direction under this state (i.e. naturalness) in the region desired by measurement and desired region 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 under the elongation state of leg pars contractilis ".
Carry out calculating by utilizing these measurement results with described formula and measure percentage elongation.
In addition, the interval between the medial extremity of pair of right and left leg pars contractilis 75 on the W of product width direction broadens along with going from lower crotch region 25 towards front waist area 20, and broadens along with going from lower crotch region 25 towards rear waist area 30.When diaper being dressed in the health of wearer, go and the shape broadened by leg pars contractilis being configured to narrower at lower crotch region 25 and towards front and back waistline, leg pars contractilis more can be made along the lines of the health of wearer, and lower limb leg pars contractilis being suitably configured under elongation state wearer encloses.
And pair of right and left leg pars contractilis 75 this interval (D1 in figure) between the end of front waist area 20 is narrower at the interval (D2 in figure) of the end of rear waist area 30 than pair of right and left leg pars contractilis 75.In addition, these intervals do not have the state of fold and distance between the medial extremity measuring pair of right and left leg pars contractilis 75 after keeping this state on the W of product width direction obtains being spread to from naturalness along product length direction L and product width direction W by disposable diaper 10.
The skin surface of the health of wearer to extend in buttocks large especially, the position near the outside on the W of product width direction is comparatively remarkable.In addition, leg pars contractilis 75 is close to the health of wearer.Therefore, by being set to D2 > D1, even if when the action of wearer puts on disposable diaper 10, the leg pars contractilis 75 of buttocks side also can keep the state be close to stretch, even if the variable quantity stretched is comparatively large, leg pars contractilis 75 also can not be tightened.Thus, can suppress due to leg pars contractilis 75 and cause disposable diaper 10 to depart from.
In addition, the interval between two lower limbs of wearer be lower crotch region the narrowest, from lower crotch region towards abdominal part side, side, the back shape of going and broadening.Because leg-openings portion and leg pars contractilis 75 are towards the outside on the L of product length direction and the shape towards product width direction W extension from lower crotch region, therefore, it is possible to enclose configuration leg-openings portion and leg pars contractilis 75 along the lower limb of wearer, the concentration of local of stress can be suppressed, therefore, it is possible to be close to wearer with relatively low percentage elongation, the burden to skin can be reduced.
Leg pars contractilis 75 is configured to make disposable diaper to enclose bending mode along the lower limb of wearer to shrink.End on the product length direction L of leg pars contractilis 75 is configured to broaden on the W of product width direction, and is configured near waistline maintaining part.Therefore, work in the mode of shrinking along product width direction W together with waistline maintaining part in the end on the product length direction of leg pars contractilis 75.
(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 the lower crotch region 25 of wearer when wearing disposable diaper 10 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.
In the 1st embodiment, on the L of product length direction, the length of crotch pars contractilis 200 is identical with the length of lower crotch region 25.Thus, on the L of product length direction, the length of front waist area 20 is the length of anterior end to the anterior end of front waist area 20 from crotch pars contractilis 200.Similarly, on the L of product length direction, the length of rear waist area 30 is the length of rear end to the rear end of rear waist area 30 from crotch pars contractilis 200.
In the 1st embodiment, crotch pars contractilis 200 is formed to pass imaginary product center line VL t.Imagination product center line VL tfor passing through the center C on the product length direction L of disposable diaper 10 tand along the imaginary line that product width direction W extends.
Disposable diaper 10 has the broken line FL extended along product width direction W.Such as, disposable diaper 10 is sealing in packaging under with the state of broken line FL for basic point doubling.Broken line FL is formed at position overlapping with crotch pars contractilis 200 in lower crotch region 25.
In addition, it should be noted that imaginary product center line VL tby the center C on the product length direction L of disposable diaper 10 when disposable diaper 10 (elastic component 71) is in elongation state timaginary line.Preferably, broken line FL when disposable diaper 10 (elastic component 71) is in contraction state by the center on the product length direction L of disposable diaper 10.Thus, preferably, under the elongation state of disposable diaper 10, broken line FL is located on the L of product length direction than imaginary product center line VL tthe position of side rearward.Thus, under the state in disposable diaper 10 doubling, the height of the height of the rear end of rear waist area 30 and the anterior end of front waist area 20 is easy to alignment.
In detail, when disposable diaper 10 is in elongation state, consider following situation: on the L of product length direction, from imaginary product center line VL tlength to the end of rear waist area 30 and from imaginary product center line VL tlength " L to the end of front waist area 20 h" represent, the length from broken line FL to the end of rear waist area 30 represents with X, from imaginary product center line VL tlength A to the anterior end of crotch pars contractilis 200 frepresent, from imaginary product center line VL tlength A to the rear end of crotch pars contractilis 200 brepresent, from imaginary product center line VL tlength to broken line FL represents with X.In addition, consider following situation: the percentage elongation of crotch pars contractilis 200 represents with " t ", represents with P according to the scope that the product thickness at the position overlapping with broken line FL is determined.
Under these circumstances, preferably, X={ [L is certainly being met h-A f(t-1)/t]-[L h-A b(t-1)/t] } form broken line FL in the scope of the position ± P of the relation of × 1/2 × t.By forming broken line FL in the position meeting above-mentioned relation, under the state in disposable diaper 10 doubling, the height alignment of the height of the rear end of rear waist area 30 and the anterior end of front waist area 20.
So, in the 1st embodiment, in lower crotch region 25, the position overlapping with absorber 40 is formed with crotch pars contractilis 200.In addition, crotch pars contractilis 200 is formed to pass imaginary product center line VL t, and overlapping with broken line FL.
Thus, crotch pars contractilis 200 can stretch on the L of product length direction, and is formed at the position overlapping with absorbent core 40a when overlooking.Thus, under the state that front waist area 20 and rear waist area 30 are held in the health of wearer, under the effect of the contraction of crotch pars contractilis 200, comprise the lower crotch region 25 of broken line FL to carry in the mode of the health of wearer together with absorber 40.Thus, inhibit the gap between disposable diaper 10 and wearer at broken line FL place.In addition, by suppressing the generation in gap under the effect of the contractility of crotch pars contractilis 200, can by the past under the effect of the contractility of the elastic component 71 of leg pars contractilis 75 or leg side rivel 80 etc. on the absorbent core 40a of disposable diaper 10 the random horizontal wrinkle (producing the main cause in gap) produced concentrate on crotch pars contractilis 200, the horizontal wrinkle produced under the effect of the contractility of the elastic component 71 of leg pars contractilis 75 or leg side rivel 80 etc. utilize crotch pars contractilis 200 in the mode of the health near wearer on carry.Thus, inhibit the gap between disposable diaper 10 and wearer.
So, even if when disposable diaper 10 is sealing in packaging with folding state, also can suppress the gap produced between disposable diaper 10 and wearer when wearing disposable diaper 10, and front waist area 20 and rear waist area 30 can be suppressed to depart from towards in-leg direction.
In the 1st embodiment, imaginary crotch centrage VL cbe located at than imaginary product center line VL tthe position of forward side.Imagination crotch centrage VL cby the center C on the product length direction L of crotch pars contractilis 200 c, and along product width direction W extend imaginary line.
So, in the 1st embodiment, imaginary crotch centrage VL cbe located at than imaginary product center line VL tthe position of forward side, broken line FL is located at than imaginary product center line VL tthe position of side rearward.That is, crotch pars contractilis 200 is located at the position of the front side of deflection disposable diaper 10 on the L of product length direction.Thus, crotch pars contractilis 200, to carry in the mode of wearer, is configured with crotch pars contractilis 200 in the position that the lower crotch region with wearer is corresponding.In such a state, front side is partial to by making crotch pars contractilis 200, under the state that disposable diaper 10 is worn on wearer, the height of the height of the anterior end of front waist area 20 and the rear end of rear waist area 30 is easy to alignment, disposable diaper 10 can be worn with the state of the feature of mating the health of wearer as following, namely not front and back are symmetrical for the health of wearer, but the buttocks being positioned at dorsal part is longer than veutro.
In addition, even if when being sealing in packaging by disposable diaper 10, the height of the height of the anterior end of front waist area 20 and the rear end of rear waist area 30 is also easy to alignment.Thus, inhibit disposable diaper 10 to be fractureed in packaging, and inhibit and form broken line in not overlapping with crotch pars contractilis 200 position.Thus, the gap between disposable diaper 10 and wearer can be suppressed.
In the 1st embodiment, absorbent core 40a has the overlapping part overlapping with crotch pars contractilis 200, be located at the position, front side of the position of side more forward than overlapping part and be located at the rear side position than the overlapping part position of side rearward.On the W of product width direction, the width of overlapping part is less than the width at front side position, and less than the width at rear side position.So, at the position overlapping with crotch pars contractilis 200, by reducing the width of absorbent core 40a, thus the lower limb making the fold of the absorbent core 40a produced under the effect of the contractility of crotch pars contractilis 200 be difficult to tangle wearer encloses, the gap between disposable diaper 10 and wearer can be reduced more reliably.
At this, in the position overlapping with broken line FL, the 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 of absorbent core 40a.
Preferably, in the position overlapping with broken line FL, the width on the product width direction W of crotch pars contractilis 200 is more than 80% of the width on the product width direction W of absorbent core 40a.Thus, in the position overlapping with broken line FL, carry on absorbent core 40a under the effect of the contractility of crotch pars contractilis 200, the gap between disposable diaper 10 and wearer can be reduced more reliably.In addition, the outside on the product width direction W of crotch pars contractilis 200, above-mentioned interval is preferably set to equal.
Preferably, at the position that crotch pars contractilis 200 is overlapping with absorbent core 40a, the width on the product width direction W of crotch pars contractilis 200 is narrower than the width on the product width direction W of absorbent core 40a.Thus, under the effect of the contractility of crotch pars contractilis 200, the end on the product width direction W of absorbent core 40a is difficult to shrink.Thus, the flexibility of the end on the product width direction W of absorbent core 40a is relatively kept, even if the lower limb of wearer is encountered in the end on the product width direction W of absorbent core 40a, wearer is also difficult to feel the sense of discomfort caused along with the contraction of the end of absorbent core 40a.
Such as, in the position overlapping with broken line FL, when the width of absorbent core 40a is 120mm, the width of crotch pars contractilis 200 is preferably 60mm ~ 110mm.It is further preferred that the width of crotch pars contractilis 200 is preferably 90mm ~ 110mm.
So, in the 1st embodiment, in the position overlapping with broken line FL, the 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 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 the position overlapping with broken line FL such absorbent core 40a on carry, the gap between disposable diaper 10 and wearer can be reduced.In the position overlapping with broken line FL, width on the product width direction W of crotch pars contractilis 200 is more than 80% of width on the product width direction W of absorber 40 (absorbent core 40a), 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 the position not configuring absorbent core 40a is shunk, and the rigidity at the position in the outside on the product width direction W of crotch pars contractilis 200 rises.Thus, crotch pars contractilis 200 is easy to the huckle tangling wearer.In addition, when the position not configuring absorbent core 40a is provided with crotch pars contractilis 200, at the position not configuring absorbent core 40a than under the position being configured with absorbent core 40a more contracted state, dress disposable diaper 10.Thus, form the component not configuring the position of absorbent core 40a overlapped, crotch pars contractilis 200 is hardening, compromises the wearing feeling of disposable diaper 10.
In the configuring area of crotch pars contractilis 200, the interval preferably 30mm ~ 60mm on the product width direction W between the medial end on the end on the product width direction W of absorbent core 40a and the product width direction W of leg pars contractilis 75.Thus, by making crotch pars contractilis 200 near the health of wearer, leg pars contractilis 75 is also easy to fit in lower limb and encloses (health), even if be applied with the action of wearer, is also difficult to produce gap between crotch pars contractilis 200 and the health of wearer.
Preferably, the narrowest position of the width on the product width direction W of absorbent core 40a is located at than imaginary product center line VL tthe position of forward side 10mm ~ 60mm.Preferably, the narrowest position of the width on the product width direction W of absorbent core 40a is located at than imaginary product center line VL tthe position of forward side 20mm ~ 40mm.Preferably, crotch pars contractilis 200 is formed to pass the narrowest position of width on the product width direction W of absorbent core 40a.
At this, 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.
Be located at product length direction L is positioned at and do not shrink under the effect of crotch pars contractilis 200 than the absorbent core 40a of crotch pars contractilis 200 front waist area 20 in the outer part, rear waist area 30.Thus, 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 region 25 of disposable diaper not excessively clings to the body, and its result, crotch pars contractilis 200 suitably configures along health.
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 25 when wearing in the crotch of wearer along health.
Its result, front waist area 20 and rear waist area 30 erect from crotch pars contractilis 200, and therefore the stickiness of the laminating wearer of disposable diaper 10 improves.
That is, under the effect of the contraction of crotch pars contractilis 200, the mode that can be configured in the lower crotch region 25 of wearer with the lower crotch region 25 of disposable diaper 10 stably dresses disposable diaper 10.
In addition, preferably, crotch pars contractilis 200 is made up of Stretchable sheet.Crotch pars contractilis 200 is formed by utilizing Stretchable sheet, the absorbent core 40a being configured with the region of Stretchable sheet shrinks equably, the lower crotch region 25 of disposable diaper 10 with absorbent core 40a together to carry in the mode of the health of wearer, can suppress the gap between disposable diaper 10 and wearer.In addition, Stretchable sheet such as can be made up of the Stretchable sheet identical with the Stretchable sheet of leg pars contractilis 75.
In addition, also can substituting this Stretchable sheet, by configuring many thread, the banded elastic components be made up of spandex, natural rubber, thus forming crotch pars contractilis 200.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, desirably the difference at the interval between adjacent elastic component is set to below 2mm.
Specifically, preferably, the percentage elongation of crotch pars contractilis 200 is 1.2 times ~ 1.8 times.In the 1st 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 1st embodiment, being 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, 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, with this state 20 DEG C ± 2 DEG C, place 60 minutes under the environment of relative humidity 60% ± 5%RH, measure the length of crotch pars contractilis along telescopic direction.Using this length as " length under the naturalness of crotch pars contractilis 200 ".
2nd, the length the telescopic direction when length in the telescopic direction under this state (i.e. naturalness) in the region desired by measurement and desired region extend to by estimating the state confirmed less than the fold caused by elastic component from naturalness.Using this length as " length under the at utmost elongation state of crotch pars contractilis 200 ".
Carry out calculating by utilizing these measurement results with described formula and measure percentage elongation.
Like this, 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 of the crotch of disposable diaper 10 is less, can not fully to form smooth shape along the mode of health in the crotch of wearer.
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 greatly 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 confirms: 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.
At this, 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 is easy to depart 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 occur to make 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, can on the basis of the rigidity of other components of the rigidity and formation disposable diaper 10 of considering absorbent core 40a, select the thickness of elastic component, the pitch of configuration that use 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 the 1st embodiment, be formed with the 1st inflection portion 41 and the 2nd inflection portion 42 at absorber 40.1st inflection portion 41 and the 2nd inflection portion 42 extend along product width direction W.2nd inflection portion 42 is positioned at the position than side rearward, the 1st inflection portion 41.1st inflection portion 41 and the 2nd inflection portion 42 become the bending basic point of disposable diaper 10.
The crotch pars contractilis 200 formed in the mode being easier to the smooth shape of maintenance than other positions of absorber 40 is provided with at the position clipped by the 1st inflection portion 41 and the 2nd inflection portion 42.1st inflection portion 41 and the 2nd inflection portion 42 are formed by the poor rigidity between the position beyond the position of the position of shrinking under the effect of the contraction of crotch pars contractilis 200 and contraction.Thus, formed smooth " bottom " at disposable diaper 10.
In addition, in the 1st embodiment, formation breach 115 (breach 125) near the 1st inflection portion 41 (the 2nd inflection portion 42).Breach 115 is formed at the region corresponding with the 1st inflection portion 41.Similarly, breach 125 is formed at the region corresponding with the 2nd inflection portion 42.Breach 115 and breach 125 are the regions that there is not the absorbent core 40a forming absorber 40.In the 1st 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, by lower than the weight per unit area of other parts of absorbent core 40a for the weight per unit area that the region of breach 115 and breach 125 is set to absorbent core 40a.
Be in better state to make the 1st inflection portion 41 and the 2nd inflection portion 42 and be formed with breach 115 and breach 125.In the 1st embodiment, 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 when being 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 and continuously.
Length along with going towards the outside on the W of product width direction on the product length direction L of breach 115 and breach 125.Utilize such shape, the outside of the rear waist area 30 of absorbent core 40a is more easily shunk, and is therefore formed smooth " bottom " at disposable diaper 10.In addition, be positioned at and erect from " bottom " than the absorbent core 40a of breach 125 near the position of 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.
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 the curve deformation of the more remarkable health along wearer.
With form the front waist area 20 of waistline maintaining part, rear waist area 30 and magic tape 90 crotch pars contractilis 200 be set independently.
(4) shape on the product length direction of disposable diaper
Below, the shape on the product length direction L of disposable diaper 10 is described.Below should notice and the length under naturalness and contraction state is described.
On the L of product length direction, the length L of rear waist area 30 rthan the length L of front waist area 20 flong.Specifically, preferably, the length L of rear waist area 30 rfor the length L of front waist area 20 f1.1 times ~ 1.6 times.Preferably, the length L of rear waist area 30 rfor the length L of front waist area 20 f1.2 times ~ 1.5 times.
At this, if the length L of rear waist area 30 rexceed the length L of front waist area 20 f1.6 times, then the balance between the dorsal part of disposable diaper 10 and veutro is collapsed, and when making crotch pars contractilis 200 along the lower crotch region of wearer, wearer is excessively close in front waist area 20, or rear waist area 30 is given prominence to from wearer.Thus, the gap produced between disposable diaper 10 and wearer is produced.
In detail, as the shape of the health of wearer, usually, buttocks is more outstanding than hypogastric region.When making crotch pars contractilis 200 along the lower crotch region of wearer, by the length L by rear waist area 30 rwith the length L of front waist area 20 fbetween ratio set in above-mentioned scope, achieve the shape of the disposable diaper 10 of the shape of the health being suitable for wearer.
That is, inhibit the generation of tightening of the disposable diaper 10 caused due to undersize, and inhibit and have more than needed due to size and the generation in unnecessary gap between the disposable diaper 10 caused and the health of wearer.
Particularly, walk front for starting or just started the infant after walking, preferably taking the attitude that health is curled towards veutro.Under such attitude, the skin of buttocks side is easy to the state becoming stretching, extension, by the length L by rear waist area 30 rwith the length L of front waist area 20 fbetween ratio set in above-mentioned scope, achieve the shape of the disposable diaper 10 of the health being suitable for infant.
Such as, under elongation state, the total length L on the product length direction L of disposable diaper 10 t(that is, 2L h) for 400mm when, preferably, the length L of front waist area 20 ffor 130mm, the length L of crotch pars contractilis 200 cfor 80mm, the length L of rear waist area 30 rfor 190mm.
Adopt such size, the length L of rear waist area 30 rfor the length L of front waist area 20 fabout 1.46 times.Thus, not only crotch pars contractilis 200, as the entirety on the product length direction L of disposable diaper 10 can both along the health of wearer thus dress disposable diaper 10.
(5) manufacture method of disposable diaper
Next, an example of the manufacture method of the absorbent commodity of the 1st embodiment is described.In addition, for unaccounted manufacture method in the 1st 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, cut off operation and broken line formation process.
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, knit on sheet what form back sheet, load the concertina type sheet material for forming crotch pars contractilis 200, for form leg pars contractilis 75 Stretchable sheet, for form positive dough sheet knit sheet etc. other knit the constituent part for forming disposable diaper 10 such as sheet, leakproof sheet material, absorber.
Such as, with the Stretchable sheet of non-elongate state conveying for being formed crotch pars contractilis 200, and, utilize the difference of the rotary speed of two rotating rollers to extend this Stretchable sheet.Preferably, this Stretchable sheet is extended more than 2 times.Then, utilize for carrying the speed difference between the ribbon conveyer of this Stretchable sheet and interval drum that this Stretchable sheet is elongated to desired multiplying power.Stretchable sheet cuts into the length of each product by interval drum.Along with the rotation setting Stretchable sheet interval each other of interval drum, Stretchable sheet is transferred in continuous print and knits on sheet.So, crotch pars contractilis 200 can be configured.
In addition, be used in the Stretchable sheet forming leg pars contractilis 75 and extend, and then be transferred on interval drum while the W displacement of product width direction, according to the length cutting Stretchable sheet of each product on interval drum.Set Stretchable sheet interval each other with the rotation of interval drum, Stretchable sheet is transferred to continuous print and knits on sheet.Like this, leg pars contractilis 75 can be configured to curve-like.
Enclose in formation process at lower limb, cut off positive dough sheet 50, outer load 60 and back sheet 60a along the end on the product width direction W of leg pars contractilis 75.Thus, the leg-openings portion 35 that the lower limb that formation is configured in wearer is placed.
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.
In broken line formation process, by the pressure of the wire along product width direction W being put on disposable diaper 10 from side, skin face towards side, non-skin face, form broken line FL.In detail, as mentioned above, preferably, X={ [L is certainly being met h-A f(t-1)/t]-[L h-A b(t-1)/t] } form broken line FL in the scope of the position ± P of the relation of × 1/2 × t.
[variation 1]
Below, the variation 1 of the 1st embodiment is described.Below, mainly the difference relative to the 1st embodiment is described.
Specifically, in variation 1, the thickness of rear waist area 30 is different according to position.Fig. 4 represents that disposable diaper 10 is with the figure of broken line FL for the state of basic point doubling.In detail, Fig. 4 represents the cross section along the F3-F3 line shown in Fig. 1 of disposable diaper 10.
As shown in Figure 4, rear waist area 30 has: opposite site 30X, and it is relative with crotch pars contractilis 200; And other positions 30Y.Other positions 30Y is continuous with opposite site 30X and has the position of the thickness of constant.
The thickness of other positions of the Thickness Ratio of opposite site 30X 30Y is thin.Thus, the thickness utilizing crotch pars contractilis 200 to increase relaxes due to opposite site 30X, even if therefore that multiple disposable diaper 10 is overlapping, and also can the upper as a whole increase relaxed along with the thickness of the formation of crotch pars contractilis 200.
In addition, should notice, as shown in Figure 4, the height alignment of the height of the rear end of rear waist area 30 and the anterior end of front waist area 20.
The measurement > of < thickness
Can the thickness of measuring object position (such as after waist area 30) as follows.Specifically, in diameter 10mm circle by 2.5gf/cm 2load put on object position state under, use the thickness at the rugged making of Co., Ltd.'s tail made PEACOCK dial thickness gauge measuring object position.In addition, disposable diaper is being extended to the measurement confirming to carry out under less than the state of the state of the fold caused by elastic component such thickness at non-telescoping sheet material by range estimation from naturalness.
< measurement of length >
Use the elasticity tape measure (tape portion: be base material with glass fibre take polrvinyl chloride as cover layer) of affine mensuration Co., Ltd. of Japan along measuring object position to measure length, thus measure " length " in this description.Under respective state, above-mentioned measurement is carried out, using this meansigma methods as length to 10 samples.
[variation 2]
Below, the variation 2 of the 1st embodiment is described.Below, mainly the difference relative to the 1st embodiment is described.
Specifically, in the 1st embodiment, leg pars contractilis 75 is made up of Stretchable sheet.In other words, in the 1st embodiment, leg pars contractilis 75 is made up of the elastic component of band shape.In contrast, in variation 2, as shown in Figure 5, leg pars contractilis 75 is made up of thread elastic component.
In addition, Japanese Patent goes out to be willing to that the full content of No. 2012-247871 (on November 9th, 2012 files an application) is by referring to enrolling present specification.
utilizability in industry
So, following a kind of disposable diaper can be provided: even if when disposable diaper is sealing in packaging with folding state, also can suppress the gap produced between disposable diaper and wearer when wearing disposable diaper, and the front waist area of disposable diaper and rear waist area can be suppressed to depart from towards in-leg direction.
description of reference numerals
L ... product length direction, W ... product width direction, 10 ... disposable diaper, 20 ... front waist area, 25 ... lower crotch region, 30 ... rear waist area, 35 ... leg-openings portion, 40 ... absorber, 40a ... absorbent core, 40b ... core covering, 41 ... 1st inflection portion, 42 ... 2nd inflection portion, 50 ... positive dough sheet, 60 ... outer load, 60a ... back sheet, 70 ... flank, 71 ... elastic component, 75 ... leg pars contractilis, 75I ... width inner end portion, 80 ... leg side rivel, 81 ... bonding part, 81A ... 1st bonding part, 81B ... 2nd bonding part, 82 ... free end portion, 84 ... contraction flow region, 85 ... waistline pars contractilis, 90 ... magic tape, 91 ... substrate sheets, 92 ... hook tabs, 95 ... target portion, 110 ... breach, 115 ... breach, 125 ... breach, 200 ... crotch pars contractilis.

Claims (8)

1. a disposable diaper, it has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area, and have 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 is characterised in that
This disposable diaper possesses: absorber, its through described lower crotch region and to described front waist area and described after in waist area at least any one extends; And
Crotch pars contractilis, it is formed at position overlapping with described absorber in described lower crotch region, and has retractility,
Under the elongation state of described disposable diaper, described crotch pars contractilis is by the center on the described product length direction of described disposable diaper, and be formed to pass the imaginary product center line extended along described product width direction, and, under the naturalness of described disposable diaper, in order to be piled up in described front waist area and described rear waist area, described crotch pars contractilis is overlapping in described lower crotch region with the broken line extended along described product width direction
When described disposable diaper is in elongation state, the imaginary crotch centrage extended by the center on the described product length direction of described crotch pars contractilis and along described product width direction is located at the position of side more forward than described imaginary product center line, and described broken line is located at the position than described imaginary product center line side rearward on described product length direction.
2. disposable diaper according to claim 1, is characterized in that,
Described absorber has the absorbent core be made up of absorbable polymer and predetermined fiber,
Described absorbent core has the overlapping part overlapping with described crotch pars contractilis, be located at position, front side than the position of the forward side of described overlapping part and the rear side position be located at than the described overlapping part position of side rearward,
On described product width direction, the width of the overlapping part of described absorbent core is less than the width at position, described front side, and less than the width at described rear side position,
In the position overlapping with described broken line, the width on the described product width direction of described crotch pars contractilis is more than 1/2 of the width on the described product width direction of described absorbent core.
3. disposable diaper according to claim 1, is characterized in that,
Amount of contraction on the described product length direction of described crotch pars contractilis is 2% ~ 8% of the total length on the described product length direction of described disposable diaper.
4. disposable diaper according to claim 1, is characterized in that,
Described rear waist area has under described disposable diaper is with the state of described broken line for basic point doubling: opposite site, and it is relative with described crotch pars contractilis; And other positions,
Described in the Thickness Ratio of described opposite site, the thickness at other positions is thin.
5. disposable diaper according to claim 1, is characterized in that,
Length on the described product length direction of described rear waist area is 1.1 times ~ 1.6 times of the length on the described product length direction of described front waist area.
6. disposable diaper according to claim 1, is characterized in that,
Length on the described product length direction of described rear waist area is 1.2 times ~ 1.5 times of the length on the described product length direction of described front waist area.
7. disposable diaper according to claim 1, is characterized in that,
Described disposable diaper is sealing in packaging under with the state of described broken line for basic point doubling.
8. disposable diaper according to claim 1, is characterized in that,
When described disposable diaper is in elongation state, on described product length direction, from the length L of described imaginary product center line to the end of described rear waist area hrepresent, from the length A of described imaginary product center line to the anterior end of described crotch pars contractilis frepresent, from the length A of described imaginary product center line to the rear end of described crotch pars contractilis brepresent, represent with X from the length of described imaginary product center line to broken line,
The percentage elongation of described crotch pars contractilis represents with t,
The product thickness at the position overlapping with described broken line represents with P,
Described broken line is located at from meeting X={ [L h-A f(t-1)/t]-[L h-A b(t-1)/t] } in the scope of the position ± P of the relation of × 1/2 × t.
CN201380058343.7A 2012-11-09 2013-11-08 Disposable diaper Active CN104812344B (en)

Applications Claiming Priority (3)

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JP2012-247871 2012-11-09
JP2012247871A JP5249461B1 (en) 2012-11-09 2012-11-09 Disposable diapers
PCT/JP2013/080232 WO2014073635A1 (en) 2012-11-09 2013-11-08 Disposable diaper

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KR102153151B1 (en) 2020-09-07
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JP5249461B1 (en) 2013-07-31
BR112015010614B1 (en) 2022-01-18

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