CN105407849A - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
CN105407849A
CN105407849A CN201480042310.8A CN201480042310A CN105407849A CN 105407849 A CN105407849 A CN 105407849A CN 201480042310 A CN201480042310 A CN 201480042310A CN 105407849 A CN105407849 A CN 105407849A
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CN
China
Prior art keywords
disposable diaper
width direction
waist area
product
product width
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
CN201480042310.8A
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Chinese (zh)
Other versions
CN105407849B (en
Inventor
坂口智
山中康弘
泽加奈
三宅真纪
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Unicharm Corp
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Unicharm Corp
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Publication of CN105407849A publication Critical patent/CN105407849A/en
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Publication of CN105407849B publication Critical patent/CN105407849B/en
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49011Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
    • A61F13/49012Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region the elastic means being elastic panels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56Supporting or fastening means
    • A61F13/5622Supporting or fastening means specially adapted for diapers or the like
    • A61F13/5633Supporting or fastening means specially adapted for diapers or the like open type diaper

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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) arranged on an outside end section in the product width direction in the rear waist area and comprising: a pair of fastening tapes (90) that fasten to the front waist area; and a waist expanding/contracting sheet that straddles the center of the disposable diaper in the product width direction and has expansion/contraction properties in the product width direction. The waist expanding/contracting sheet has a rear-side waist expansion/contraction sheet (85) arranged in a rear-side end section (10R) of the disposable diaper. The rear-side end section (10R) of the disposable diaper has a curved shape whereby the center in the product width direction is recessed more on the inside in the product longitudinal direction than the outside in the product width direction, in the natural state of the disposable diaper.

Description

Disposable diaper
Technical field
The present invention relates to a kind of disposable diaper.
Background technology
In the past, be known to a kind of disposable diaper, this disposable diaper has front waist area, rear waist area and lower crotch region, and comprise and cross over lower crotch region and the absorber that extends of waist area and rear waist area and for the magic tape (for example, referring to patent documentation 1) by front waist area and the set of rear waist area forward.
Usually, magic tape extends out outside width from the width outboard end of the rear waist area of disposable diaper.When dressing the disposable diaper of patent documentation 1, waist area before the magic tape of rear waist area being pulled under the state of the in-leg lower crotch of disposable diaper being configured in wearer waist area before this magic tape is bonded to.
In addition, the elastic component that can stretch in the width direction is configured with in the waist opening portion of the disposable diaper of patent documentation 1.By the flexible waistline making the waist opening portion of disposable diaper be sealed at wearer of elastic component.
prior art document
patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2006-20665 publication
Summary of the invention
Usually, the abdominal circumference of infant is given prominence to.In order to suitably cover the convex camber of the abdominal part of this infant, can expect that dressing auxiliary anchors at magic tape on the convex camber of abdominal part.Anchor at the state on the convex camber of abdominal part at magic tape under, the region that self-adhesion cingulum extends in the width direction is sealed at the health of wearer, and waist opening portion fits in because elastic component shrinks in the direction of the width around the abdominal part of wearer.
Anchor at the state on the convex camber of abdominal part at magic tape under, the size in the region that self-adhesion cingulum extends in the width direction and the abdominal circumference size bloated of wearer match.But, sometimes, make the position of disposable diaper offset because of the motion of wearer.Such as, when the set position of the magic tape of disposable diaper offsets to in-leg side, the region that self-adhesion cingulum extends in the width direction can offset from the convex camber of the abdominal part of wearer.Therefore, the size in the region that self-adhesion cingulum is extended in the width direction is greater than the waistline of wearer, thus the position of disposable diaper more easily offsets.
Therefore, the present invention makes in view of such situation, its object is to, and provides a kind of disposable diaper that suitably can cover the convex camber of the abdominal part of wearer.
Will being intended to of disposable diaper of the present disclosure (disposable diaper 10), it comprises: front waist area (front waist area 20); Rear waist area (rear waist area 30); Lower crotch region (lower crotch region 25), it is between described front waist area and described rear waist area; Product length direction (product length direction L), its from described front waist area towards described rear waist area; Product width direction (product width direction W), it is orthogonal with described product length direction; Absorber (absorber 40), it crosses over described lower crotch region, and extends at least one in described front waist area and described rear waist area; A pair magic tape (magic tape 90), it is configured at the outboard end on the product width direction of described rear waist area, is bonded to described front waist area; And waist stretchable sheet, it crosses over the center in the described product width direction of disposable diaper, and on described product width direction, there is retractility, wherein, described waist stretchable sheet has the posterior lumbar stretchable sheet (posterior lumbar stretchable sheet 85) of the rear end being configured at described disposable diaper, and the described rear end of described disposable diaper has the curved shape caved in than the inner side in product length direction described in lateral, product width direction at center, product width direction under the naturalness of described disposable diaper.
Accompanying drawing explanation
Fig. 1 is the expansion plane graph under the elongation state of the disposable diaper of present embodiment.
Fig. 2 is the plane graph under the naturalness of the local of the disposable diaper of present embodiment.
Fig. 3 is the sectional view of the disposable diaper along the F1-F1 line shown in Fig. 1.
Fig. 4 is the sectional view of the disposable diaper along the F2-F2 line shown in Fig. 1.
Fig. 5 is the figure representing the state disposable diaper of present embodiment being worn on wearer.
Fig. 6 is the figure of the deformation state schematically showing posterior lumbar stretchable sheet.
Detailed description of the invention
Next, the embodiment of disposable diaper 10 of the present invention is described with reference to accompanying drawing.In addition, in the record of accompanying drawing below, the Reference numeral identical or similar to identical or similar part mark.But should be noted that accompanying drawing is schematic, the ratio of each size etc. are different from the ratio of each size of reality.
Thus, concrete size etc. should be judged with reference to the following description.In addition, the relation of size each other, part that ratio is different may also be comprised each other at accompanying drawing.
(1) the overall schematic configuration of disposable diaper
Fig. 1 is the expansion plane graph under the elongation state of the disposable diaper 10 of present embodiment.Fig. 2 is the plane graph under the naturalness of the local (rear end side) of the disposable diaper of present embodiment.Fig. 3 is the sectional view of the disposable diaper along the F1-F1 line shown in Fig. 1.Fig. 4 is the sectional view of the disposable diaper along the F2-F2 line shown in Fig. 1.
Elongation state shown in Fig. 1 is the state 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 elongated to formation disposable diaper does not form till the state of fold.On the other hand, naturalness is when disposable diaper 10 is enclosed in packaging etc., takes out disposable diaper 10 from packaging, with this state 20 DEG C ± 2 DEG C, place 12 hours under the environment of relative humidity 60% ± 5%RH after state.For the disposable diaper under naturalness, be formed with fold at the positive dough sheet 50, flank 70 etc. forming disposable diaper.
Disposable diaper 10 is the disposable diaper of banding pattern.The diaper of banding pattern refers to that the outboard end on the product width direction of outboard end on the product width direction of front waist area and rear waist area does not engage before use and utilizes the diaper that the set components such as magic tape engage in use.
Disposable diaper 10 has front waist area 20, lower crotch region 25 and rear waist area 30.Front waist area 20 is the part contacted with the frontal cowl of wearer (abdominal part part).In addition, rear waist area 30 is the part contacted with the rear waist portion (back portion) of wearer.Lower crotch region 25 is between front waist area 20 and rear waist area 30.
In addition, in the present embodiment, be called product length direction L by from front waist area 20 towards the direction of rear waist area 30, the direction with the L-orthogonal of product length direction be called product width direction W.
Disposable diaper 10 comprises absorber 40, and this absorber 40 crosses over lower crotch region 25, and from lower crotch region 25 towards at least any one extension in front waist area 20 and rear waist area 30.Absorber 40 comprises absorbent core 40a and core covering 40b.
Absorbent core 40a is identical with the absorbent core of disposable diaper in the past, can use and pulverize the known component such as slurry, superabsorbent polymer, material and suitably forming.Absorbent core 40a is coated with by the core covering 40b of lamellar.
Core covering 40b is the sheet covering absorbent core 40a.A part for the side, at least skin face of core covering 40b is formed by the various fabric nonwoven cloth or cotton paper sheets with liquid permeability.Grammes per square metre such as can be used to be about 10g/m 2~ 30g/m 2hot blast fabric nonwoven cloth, spun-bonded non-woven fabrics, SMS (spunbond-melt blown-spunbond) non-woven fabrics or grammes per square metre be about 10g/m 2~ 30g/m 2cotton paper sheets.
After being positioned at of absorber 40, the position of waist area is provided with the low rigidity portion 110 as Low rigidity region, the weight per unit area of this low rigidity portion 110 is lower than the weight per unit area at other positions of absorber, or this low rigidity portion 110 does not exist absorbent core 40a.Low rigidity portion 110 is shapes that the product width direction central authorities of the end of the side, waist area rearward of length self-priming acceptor 40 on product width direction go towards side, front waist area to shorten gradually.More specifically, when overlooking disposable diaper 10, low rigidity portion 110 is wedge shape.In addition, the boundary between absorbent core 40a and low rigidity portion 110 is formed by the circular arc protruded towards the center on the W of product width direction.The ratio low rigidity portion 110 of absorber 40 is the trapezoidal shape protruded towards the end of side, waist area rearward by the part outside product width direction.
The positive dough sheet 50 of liquid permeability is provided with in the face side (side, skin contact face) of absorber 40.In addition, the back sheet 60a of opaque liquid is provided with 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.
Back sheet 60a is configured at anterior end 10F than disposable diaper by inside product length direction and than the rear end 10R of disposable diaper by the position inside product length direction.Back sheet 60a is configured at end, product width direction than disposable diaper by the position inside product width direction.Outer load is configured at the surface by side, non-skin contact face of disposable diaper.Outer load is formed by such as non-woven fabrics.
Side edge part on the product width direction W of absorber 40 is respectively equipped with flank 70.Flank 70 crosses over front waist area 20, lower crotch region 25 and rear waist area 30, and is configured at than absorber 40 by the position outside product width direction.Flank 70 is formed by a non-woven fabrics, or is laminated by multiple non-woven fabrics 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 provided at side end on the product width direction of disposable diaper and encloses the part of configuration under the state being dressed in wearer at disposable diaper along the lower limb of wearer.Leg opening part 35 is towards the central concave on the product width direction of absorbent main body.
In addition, magic tape 90 is respectively equipped with at a pair flank 70.Magic tape 90 is configured at the outboard end on the product width direction of rear waist area, for being bonded to front waist area.Magic tape 90 extends to than flank 70 by the position outside product width direction.Magic tape 90 extends along product width direction W in rear waist area 30, by being bonded to 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 to, and is configured at the non-skin contact face in front waist area and supplies a pair magic tape 90 set respectively.
In the present embodiment, waistline maintaining part is formed by front waist area 20, rear waist area 30 and magic tape 90.The scope that the waistline holding part of rear waist area 30 extends in the region of the snap portions being certainly provided with magic tape 90 along product width direction.The scope that the waistline holding part of front waist area 20 extends in the region being certainly provided with target portion 95 along product width direction.
Be provided with a pair leg pars contractilis 75 at flank 70, this pair leg pars contractilis 75 is configured at than leg opening part 35 by than absorber 40 by the position outside product width direction, stretching along product length direction L inside product width direction.
As long as leg pars contractilis 75 is configured to make leg opening part 35 can stretch along product length direction, both can configure along leg opening part 35, the state configuration also can tilted for leg opening part 35 with Local Phase.
In addition, be configured with a pair auxiliary telescopic portion 77 than leg pars contractilis 75 by the position outside product width direction, lower crotch region 25 and the configuration of ground, rear waist area 30 are crossed over by this pair auxiliary telescopic portion 77, and flexible along product length direction.Flank 70 can be made along the buttocks with convex camber of wearer by making the regions contract being provided with auxiliary telescopic portion 77 of flank 70, thus this region can be utilized to cover buttocks.
In addition, the part that leg pars contractilis 75 and auxiliary telescopic portion 77 shrink along product length direction in fact for utilizing the elastic components such as rubber band is the concept except the part except being configured with elastic component under the state not playing contractility.
Leg pars contractilis 75 by stretch along product length direction, the elastic component that to be provided with three in every side formed.Auxiliary telescopic portion 77 by stretch along product length direction, the elastic component that to be provided with one in every side formed.The elastic component of present embodiment comprises polyurethane elastomeric fiber, natural rubber.
The rear end 75R of leg pars contractilis 75 is configured at than the forward side of magic tape 90 and than magic tape by the position inside product width direction.Thus, leg pars contractilis 75 is utilized to make than the forward side of magic tape 90 and by the regions contract inside width.
The anterior end 77F in auxiliary telescopic portion 77 is configured at the position of the anterior end 75F side rearward than leg pars contractilis 75.Therefore, the anterior end 75F regions contract rearward that auxiliary telescopic portion 77 makes than leg pars contractilis 75 is utilized.The rear end 77R in auxiliary telescopic portion 77 is configured at the position of the rear end side rearward than leg pars contractilis.Thus, auxiliary telescopic portion 77 is utilized to make than leg pars contractilis 75 regions contract rearward.
Leg pars contractilis 75 can be utilized to mention the lower crotch region of disposable diaper towards the lower crotch of wearer.Further, can utilize auxiliary telescopic portion 77 that the power being mentioned lower crotch region by leg pars contractilis is passed to magic tape 90.Therefore, under the state by magic tape 90 set, not only be easy to utilize magic tape 90 to make the region of the waistline that will be held in wearer be sealed at wearer with the region being configured with leg pars contractilis 75, but also be easy to make the region between magic tape 90 and leg pars contractilis 75 be sealed at wearer.
Further, auxiliary telescopic portion can be utilized to make than leg pars contractilis by the regions contract outside product width direction, thus the part of the rear waist area of flank can be utilized suitably to cover buttocks.Therefore, it is possible to especially suppress rear side leg opening part to tilt when wearing.In addition, the contraction of leg pars contractilis can be utilized to be furthered to bodyside by leg opening part, thus the skew of leg opening part can be suppressed.
Leg pars contractilis 75 is configured between flank 70 and outer mounting 60.Or in the region being provided with the back sheet 60a be configured between absorber 40 and outer mounting 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 as 1.9 times ~ 2.2 times.In addition, percentage elongation refers to the elongation degree of leg pars contractilis, specifies in the following way.
Percentage elongation=(length under the elongation state of leg pars contractilis) ÷ (length under the naturalness of leg pars contractilis) of leg pars contractilis
In addition, the percentage elongation in auxiliary telescopic portion 77 is preferably 1.6 times ~ 2.4 times.In addition, the percentage elongation in auxiliary telescopic portion 77 refers to and the elongation degree in auxiliary telescopic portion specifies in the following way.
Percentage elongation=(length under the elongation state in the auxiliary telescopic portion) ÷ (length under the naturalness in auxiliary telescopic portion) in auxiliary telescopic portion
In addition, in this manual, this percentage elongation is such as measured in such a way.
First, when disposable diaper 10 is enclosed packaging etc., from packaging, disposable diaper 10 is taken out.Then, the configuring area of the measuring objects such as leg pars contractilis is cut out.Now, cut with also comprising the outer load that engages with measuring objects such as leg pars contractilis.Measure the percentage elongation of the sample cut out, thus measure the percentage elongation of measuring object.
By each sample 20 DEG C ± 2 DEG C, relative humidity places 60 minutes under being the environment of 60% ± 5%RH, and measures the length of measuring object along telescopic direction.This length is set to " length under the naturalness of measuring object (leg pars contractilis etc.) ".
Then, measure length in telescopic direction of desired region under this state (i.e. naturalness) and sample has been extended to from naturalness by range estimation cannot till non-telescoping sheet observes the state of the fold produced because of elastic component time the length of desired region in telescopic direction.This length is set to " length under the elongation state of measuring object (leg pars contractilis etc.) ".
By using these measurement results and utilizing described formula to calculate, thus measure percentage elongation.
In addition, following measuring method is utilized to measure " length " in this description.
Use the sample obtained in the following way, namely, when disposable diaper 10 is enclosed packaging etc., take out disposable diaper 10 from packaging, with this state 20 DEG C ± 2 DEG C, place 12 hours under the environment of relative humidity 60% ± 5%RH and the sample that obtains.
Then, by use affine mensuration Co., Ltd. of Japan elasticity tape measure (tape portion: be base material with glass fibre take polrvinyl chloride as cover layer) and to make its mode along measuring object position measure the length under this state at measuring object position.In addition, for the length of elongation state, measure in length disposable diaper 10 having been extended to measuring object position when passing through till range estimation cannot observe the state of the fold produced because of elastic component from naturalness.
At this, under respective state, described measurement is carried out for 10 samples, and its meansigma methods is set to length.
In addition, a pair leg side rivel 80 extended along product length direction L is provided with in the inner side (the central side by 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, is to be configured at than the flexible rivel of leg pars contractilis 75 by the erecting inside product width direction.Leg side rivel 80 is configured at than leg pars contractilis 75 by the position inside product width direction.Leg side rivel 80 can adopt known structure, specifically, also can by with flank 70 phase independently sheet material formed.
Disposable diaper 10 has waist stretchable sheet, and this waist stretchable sheet is crossed over the center, product width direction of disposable diaper and have retractility on product width direction.Waist stretchable sheet has the posterior lumbar stretchable sheet 85 of the rear end being configured at disposable diaper and is configured at the front side waist portion stretchable sheet 86 of anterior end of disposable diaper.In addition, in FIG, the center, product width direction by disposable diaper is shown and the imaginary line L1 extended along product length direction.
The rear end 10R of disposable diaper has the center, product width direction of rear end 10R than the curved shape caved in inside the product length direction, lateral, product width direction of rear end 10R under the naturalness of disposable diaper.The rear end being positioned at the posterior lumbar stretchable sheet 85 of the rear end of disposable diaper also has center, product width direction in its natural state than the curved shape caved in inside product length direction, lateral, product width direction.
In addition, under the elongation state (state shown in Fig. 1) extended making disposable diaper, the anterior end 85F of posterior lumbar stretchable sheet 85 has the center, product width direction of anterior end 85F than the curved shape caved in outside the product length direction, lateral, product width direction of anterior end 85F.In addition, the curved shape of posterior lumbar stretchable sheet is not formed at the whole region of anterior end 85F, but is formed at the width central authorities as a part for anterior end.
Posterior lumbar stretchable sheet 85 is configured between a pair magic tape on product width direction.A part of the anterior end 85F of posterior lumbar stretchable sheet 85 is overlapping with absorber.The rear end 85R of posterior lumbar stretchable sheet 85 aligns with the rear end of disposable diaper.Length on the product width direction of posterior lumbar stretchable sheet 85 is longer and longer than the length on the width of back sheet 60a than the length on the product width direction of absorber 40.Posterior lumbar stretchable sheet extends to and to extend to than the position of back sheet 60a by the outside on product width direction by the position in the outside on product width direction than absorber 40.
The anterior end 10F of disposable diaper has the center, product width direction of anterior end 10F than the curved shape caved in inside the product length direction, lateral, product width direction of anterior end 10F under the naturalness of disposable diaper.The anterior end 86F being positioned at the front side waist portion stretchable sheet 86 of the anterior end of disposable diaper also has the center, product width direction of anterior end 86F than the curved shape caved in inside the product length direction, lateral, product width direction of anterior end 86F under the naturalness of disposable diaper.
In addition, under the elongation state (state shown in Fig. 1) extended making disposable diaper, the rear end 86R of front side waist portion stretchable sheet 86 has the center, product width direction of rear end 86R than the curved shape caved in outside the product length direction, lateral, product width direction of rear end 86R.In addition, the curved shape of front side waist portion stretchable sheet is not formed at the whole region of rear end 86R, but is formed at the width central authorities as a part of rear end 86R.
The rear end 86R of front side waist portion stretchable sheet 86 is adjacent with absorber 40 and adjacent with target portion 95 on product length direction.The rear end 86R of front side waist portion stretchable sheet 86 is positioned at than absorber 40 in the outer part and than target portion 95 position in the outer part on product length direction.
The anterior end 86F of front side waist portion stretchable sheet 86 aligns with the anterior end of disposable diaper.Length on the product width direction of front side waist portion stretchable sheet 86 is longer and longer than the length on the width of back sheet 60a than the length on the product width direction of absorber 40.Front side waist portion stretchable sheet 86 extends to and to extend to than the position of back sheet 60a by the outside on product width direction by the position in the outside on product width direction than absorber 40.
In the present embodiment, as waist stretchable sheet, preferably use the sheet when extending the narrowed width (so-called contracting width) on 2nd direction orthogonal with prolonging direction of time slice along a direction of sheet.
As waist stretchable sheet, can using by having the elastic fiber of elasticity and extensibility and the sheet that elasticity but the mixture with these two kinds of fiber mixing of non-elastic fiber of extensibility make of not having, grammes per square metre particularly can be used for 20g/m 2~ 80g/m 2, be more preferably 40g/m 2~ 75g/m 2, more preferably 50g/m 2~ 70g/m 2spun-bonded non-woven fabrics sheet, in this spun-bonded non-woven fabrics sheet, elastic fiber is the long filament of the polyurethane fiber of the fiber number with 2dtex ~ 6dtex, non-elastic fiber is at least one long filament in the long filament of the polyolefine fiber of the fiber number with 2dtex ~ 6dtex, polyester fiber and this three of Fypro, by elastic fiber and described non-elastic fiber the Mixing ratio by weight between elastic fiber with described non-elastic fiber be 40:60 ~ 60:40 scope in coordinate.Utilize gear that a part for the non-elastic fibrous layer of the non-woven fabrics as the fiber mixed by non-elastic fiber and elastic fiber is ruptured, thus make this non-woven fabrics show retractility.As other waist stretchable sheets, if it can carry out the sheet of contracting width, then can become in this structure relatively easily, carry out contracting width after shape.In addition, waist stretchable sheet is not limited to non-woven fabric plate, also can be formed by diaphragm.In addition, also can use and prepare telescopic sheet in advance, then with the sheet making the mode of the change width on the length direction of product (cutting to make its mode protruded towards inner side) carry out predeformation to this telescopic sheet.
The percentage elongation of posterior lumbar stretchable sheet 85 is preferably 1.4 times ~ 1.8 times.In the present embodiment, the percentage elongation of posterior lumbar stretchable sheet 85 is set as 1.5 times ~ 1.6 times.In addition, percentage elongation refers to the elongation degree of posterior lumbar stretchable sheet, specifies in the following way.
Percentage elongation=(length under the elongation state of posterior lumbar stretchable sheet) ÷ (length under the naturalness of posterior lumbar stretchable sheet) of posterior lumbar stretchable sheet
The percentage elongation of front side waist portion stretchable sheet 86 is preferably 1.3 times ~ 1.7 times.In the present embodiment, the percentage elongation of front side waist portion stretchable sheet 86 is set as 1.4 times ~ 1.6 times.In addition, percentage elongation refers to the elongation degree of front side waist portion stretchable sheet, specifies in the following way.
Percentage elongation=(length under the elongation state of front side waist portion stretchable sheet) ÷ (length under the naturalness of front side waist portion stretchable sheet) of front side waist portion stretchable sheet
In the present embodiment, waist stretchable sheet is configured between outer load 60 and back sheet 60a.But extend at core covering 40b and lean in the structure of the position outside product length direction than absorbent core 40a, waist stretchable sheet also can be configured between core covering 40b and back sheet 60a or between core covering 40b and outer load 60.The position of waist stretchable sheet is not particularly limited.In addition, in the region not configuring absorber, waist stretchable sheet also can be configured between flank 70 and back sheet 60a or between flank 70 and outer load 60.
Posterior lumbar stretchable sheet 85 is with configuring mode overlapping with a part for the low rigidity portion 110 of absorber during disposable diaper planar development.In addition, in the present embodiment, posterior lumbar stretchable sheet 85 configures in the mode overlapping with a part for low rigidity portion 110, but also can be, whole posterior lumbar stretchable sheet 85 configures in the mode overlapping with low rigidity portion 110.
By forming such low rigidity portion 110, do not hinder the flexible of posterior lumbar stretchable sheet 85, even if posterior lumbar stretchable sheet 85 shrinks, because low rigidity portion 110 narrows, absorber ratio low rigidity portion 110 by both sides, product width direction part between narrower intervals, therefore absorber 40 be also difficult to expect beyond shape protuberance.In addition, consider and prevent excremental leakage, preferably, the width of low rigidity portion 110 is less than the width of posterior lumbar stretchable sheet 85.
In addition, the waist stretchable sheet of present embodiment is configured to flexible along product width direction, but waist stretchable sheet also can be configured to stretch along 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 comprises: substrate sheets 91, and itself and flank 70 are connected; And hook tabs 92, it is fixed on substrate sheets 91, is provided with multiple clamping hooked as fastened component (not shown) in this hook tabs 92.Hook tabs 92 is the regions being provided with fastened component, and the waistline maintaining part in described rear waist area is the region extended along product width direction from hook tabs 92.
Hook tabs 92 is fixed on substrate sheets 91, and specifically, hook tabs 92 is engaged in substrate sheets 91.Joint between hook tabs 92 and substrate sheets 91 is not preferably to make the high mode more than required degree of the rigidity of magic tape 90 carry out.Specifically, the hot-melt adhesive be coated with 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 utilize heat-sealing etc. to engage.
Substrate sheets 91 is formed by a non-woven fabrics, or is formed by multiple non-woven fabrics overlaps of more than two.As substrate sheets 91, the non-woven fabrics utilizing the manufacture method manufacture such as spunbond (SB) or spunbond-melt blown-spunbond (SMS) can be used.The weight per unit area (multiple when be summation unit area weight) forming the non-woven fabrics of substrate sheets 91 is 30g/m 2~ 120g/m 2, be preferably 40g/m 2~ 90g/m 2.
Magic tape comprises: base portion 93, and it is overlapping with outer load; And extension 94, it extends to than outer load by the position outside product width direction.Base portion 93 is the parts overlapping with outer load under the state expanded by magic tape in substrate sheets 91.Extension 94 is not overlapping with the outer load parts in substrate sheets 91.Under the elongation state of the disposable diaper shown in Fig. 1, on product length direction, align with the center, product length direction of base portion in the center, product length direction of extension.But, under the naturalness of disposable diaper, bending along with posterior lumbar stretchable sheet 85, the position of magic tape changes, thus the product length direction of extension is centrally located at center, product length direction than base portion by the position outside product length direction.
In addition, in the present invention, the state of component overlap is following concept, that is, not only comprise the state that component is directly overlapping each other, but also comprises the state (state that the ground that is clipped in the middle by other components is overlapping) of component ground connection overlap to each other.
Target portion 95 is located at the side by non-skin contact side of the outer load 60 of front waist area.Target portion 95 is configured to the clamping hooked hook for magic tape, waves function as the environment-development comprised in the locking system of hook and ring.Target portion such as can use hot-wind nonwoven cloth.
Target portion 95 such as can use the thermoplastic synthetic resin film of fabric nonwoven cloth or the TPO be made up of the thermoplastic synthetic resin fiber of TPO.In addition, the ring being installed on target portion can be formed by the thermoplastic synthetic resin of TPO.
In addition, as target portion 95, fluffy, by preventing nonwoven surface from fluffing a part of embossing of non-woven fabrics non-woven fabrics also can be used.
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 magic tape 90 is printed on the side by non-skin contact side of back sheet 60a or outer load 60, or figuratum of band is configured in the non-skin contact side of back sheet 60a or outer load 60, thus is set to target portion.
Then, the wearing state of the disposable diaper so formed is described.When dressing disposable diaper, dress auxiliary by the magic tape of rear waist area side, waist area tractive forward.Dress auxiliary, under the state of front waist area of being furthered to by magic tape, magic tape is bonded to target portion.
Disposable diaper by present embodiment shown in Figure 5 is worn on the state of wearer.The set position of magic tape to be located at inside crotch side and width and to be mentioned front waist area while dressed the state after disposable diaper to the mode of tractive outside width by Fig. 5.By so disposable diaper being worn on wearer, the front waist area of mentioning disposable diaper can be continued, thus be easy to the abdominal part bloated covering infant.
In addition, when dressing, by magic tape is pulled to front waist area, thus by the rear end of disposable diaper tractive in the width direction.Fig. 6 be represent by magic tape by the rear waist area of disposable diaper in the width direction tractive time the figure of deformation form of posterior lumbar stretchable sheet.(a) of Fig. 6 represents the state before being out of shape, (b) of Fig. 6 represents that (c) of Fig. 6 represents the further tractive state of magic tape by magic tape from the state of (a) of Fig. 6 state to tractive outside product width direction.
Under state before the distortion shown in (a) of Fig. 6, the rear end of disposable diaper is that the product width direction central authorities of rear end are than the curved shape caved in inside the product length direction, lateral, product width direction of rear end.In addition, under state before being deformed, the anterior end of posterior lumbar stretchable sheet is that the product width direction central authorities of anterior end are than the curved shape caved in outside the product length direction, lateral, product width direction of anterior end.
When by magic tape from distortion before state outside width a little tractive time, become the state shown in (b) of Fig. 6.By magic tape is pulled to front waist area, thus by the rear end of disposable diaper tractive in the width direction.Even if in this condition, the rear end of disposable diaper is also for the product width direction central authorities of rear end are than the curved shape caved in inside the product length direction, lateral, product width direction of rear end.In addition, the anterior end of posterior lumbar stretchable sheet is that the product width direction central authorities of anterior end are than the curved shape caved in outside the product length direction, lateral, product width direction of anterior end.
When by magic tape from the state shown in (b) of Fig. 6 outside width a little tractive time, become the state shown in (c) of Fig. 6.Rear end and the product width direction of disposable diaper are almost parallel.The anterior end of posterior lumbar stretchable sheet is that the product width direction central authorities of anterior end are than the curved shape caved in outside the product length direction, lateral, product width direction of anterior end.
In addition, under state before being deformed, the rear end of disposable diaper is curved shape, and therefore, the length on the width of the rear end of disposable diaper is longer by the length on the width of the part of the position inside product length direction than this rear end than being positioned at.Thus, the rear end of disposable diaper is easy to extend in the width direction.But, the state of (c) as Fig. 6 by under the state (disposable diaper being worn on the state of wearer) of magic tape to tractive outside width, the elongation based on waist stretchable sheet of the rear end of disposable diaper is greater than the elongation based on waist stretchable sheet being positioned at the part (such as, the anterior end of posterior lumbar stretchable sheet) leaning on the position inside product length direction than this rear end.Therefore, the active force of posterior lumbar stretchable sheet becomes large along with going outside product length direction gradually.Under the state of dressing disposable diaper, can utilize the rear end of posterior lumbar stretchable sheet that tractive outside width is mentioned in front waist area.
(2) manufacture method of disposable diaper
Then, an example of the manufacture method of the disposable diaper of present embodiment is described.In addition, unaccounted method can use existing method in the present embodiment.In addition, manufacture method illustrated is below an example, and other manufacture method also can be utilized to manufacture.The manufacture method of disposable diaper at least comprises component formation process, component loads operation, lower limb encloses formation process and cut off operation.
In the manufacture method of disposable diaper, manufacture the continuum being in disposable diaper continuous print state on product length direction, by the size that this continuum is cut to a product along product width direction W, manufacture each disposable diaper thus.
In component formation process, form the component forming disposable diaper.Specifically, such as, stacked absorbing material and molding absorber 40.
In component mounting operation, form the continuous print of back sheet knit that mounting on sheet forms waist stretchable sheet, the continuous print of positive dough sheet knits sheet etc. other knit the component that sheet, absorber, leg pars contractilis 75, auxiliary telescopic portion 77 etc. form disposable diapers 10.
Now, waist stretchable sheet is by state integrated for the posterior lumbar stretchable sheet 85 of the front side waist portion stretchable sheet 86 of arbitrary disposable diaper and the disposable diaper adjacent with this arbitrary disposable diaper.Utilize and attract parts etc. to keep the both ends of this waist telescopic sheet (in the part becoming product width direction outboard end under in order to the state of disposable diaper that is shaped), make waist telescopic sheet along the product width direction elongation of disposable diaper and this waist telescopic sheet is pasted onto continuous print to knit on sheet.Due under the state that has been kept at the both ends of this waist telescopic sheet, waist telescopic sheet is extended, therefore the both ends of waist telescopic sheet are not almost extended.Percentage elongation on the product width direction at the both ends of waist telescopic sheet is less than the percentage elongation on the product width direction in the region between these both ends of waist telescopic sheet.
Specifically, being configured with in the region of waist stretchable sheet at disposable diaper, is formed with three subregions that percentage elongation is different.The region by being configured with waist stretchable sheet product width direction central authorities be set to middle section, the end, product width direction (being equivalent to the both ends of waist stretchable sheet) being configured with the region of waist stretchable sheet is set to lateral region, the region between middle section and lateral region is set to zone line time, the relation of percentage elongation meets: the percentage elongation on the product width direction of the percentage elongation > lateral region on the product width direction of the percentage elongation > zone line on the product width direction of middle section.
Percentage elongation on the product width direction of middle section can be set to 1.4 times ~ 1.8 times.Percentage elongation on the product width direction of lateral region is set be less than percentage elongation on the product width direction of middle section, 1.0 times ~ 1.1 times can be set it to.Percentage elongation on the product width direction of zone line is set be less than the percentage elongation on the product width direction of middle section and is greater than the percentage elongation of lateral region, 1.2 times ~ 1.3 times can be set to.In addition, the percentage elongation on the product width direction of lateral region is 1.0 times, and lateral region also can be the region of not extending in fact.
In addition, the telescopic sheet extended along product width direction is along product length direction contracting width.Particularly, the product width direction central authorities contracting width of telescopic sheet.Therefore, for the telescopic sheet under elongation state, the length on the product length direction of its product width direction central authorities is shorter than the length on the product length direction of end, product width direction.The telescopic sheet that state with contracting width like this has been pasted become as shown in Figure 1 the end be equivalent on the product length direction of telescopic sheet, the width central authorities of the rear end of front side waist portion stretchable sheet and both anterior end of posterior lumbar stretchable sheet are than the curved shape caved in outside width.
Lower limb encloses formation process and aligns dough sheet 50, outer load 60 and back sheet 60a and cut off.Thus, the anterior end 77F in auxiliary telescopic portion 77 is cut off, and the leg opening part 35 that the lower limb that formation is configured in wearer encloses.
In cut-out operation, the continuum being configured with positive dough sheet 50, back sheet 60a, absorber 40 etc. is cut to the size of a product along product width direction W.Thus, disposable diaper 10 is manufactured.
Continuum is cut to product one by one, thus be located at the waist stretchable sheet of disposable diaper, the elongation state of leg pars contractilis is become naturalness by removing.After the releasing elongation state, when extending contracting width state under waist stretchable sheet be out of shape in the mode of the state before returning to contracting width.Therefore, although the anterior end of the rear end of posterior lumbar stretchable sheet and front side waist portion stretchable sheet is linearity under elongation state, case of bending is deformed in its natural state.
The anterior end of front side waist portion stretchable sheet is shunk than the rear end of front side waist portion stretchable sheet, thus the anterior end of disposable diaper becomes its center, product width direction than the curved shape caved in inside the product length direction, lateral, product width direction of the anterior end of disposable diaper.Similarly, the rear end of posterior lumbar stretchable sheet is shunk than the anterior end of posterior lumbar stretchable sheet, thus the rear end of disposable diaper becomes its center, product width direction than the curved shape caved in inside the product length direction, lateral, product width direction of the rear end of disposable diaper.
In addition, continuum be cut to one by one product and become naturalness time, the anterior end of front side waist portion stretchable sheet is shunk than the rear end of front side waist portion stretchable sheet, and the rear end of posterior lumbar stretchable sheet is shunk than the anterior end of posterior lumbar stretchable sheet.The anterior end of front side waist portion stretchable sheet is than the rear end of front side waist portion stretchable sheet away from absorbent core 40a, thus the anterior end of front side waist portion stretchable sheet is not shunk more by the impact of the rigidity of absorbent core 40a.The rear end of posterior lumbar stretchable sheet is than the anterior end of posterior lumbar stretchable sheet away from absorbent core 40a, thus the rear end of posterior lumbar stretchable sheet is not shunk more by the impact of the rigidity of absorbent core 40a.
(3) action effect
Be configured with posterior lumbar stretchable sheet in the rear end of disposable diaper, thus be easy to stretch in the width direction, and due to the rear end of disposable diaper be curved shape in its natural state, therefore, be easier to make the rear end of disposable diaper to shrink.Under the state that disposable diaper is worn on wearer, can utilize the waist stretchable sheet being positioned at rear end that tractive outside width is mentioned in front waist area.Such as, even if when the position of disposable diaper offset by, also tractive outside width can be mentioned in front waist area, thus be easy to maintain the state of the convex camber being covered with abdominal part.
Posterior lumbar stretchable sheet configures in the mode overlapping with waistline maintaining part.It is further preferred that posterior lumbar stretchable sheet configures in the mode at the center, product length direction surmounting waistline maintaining part.Most preferably, posterior lumbar stretchable sheet configures in the mode of the crotch side end surmounting the product length direction of waistline maintaining part.Because the waistline maintaining part that waist contraction flow region can be utilized to be used in health disposable diaper being held in wearer is shunk in the direction of the width, therefore, even if when the wearing position of disposable diaper offset by, waistline maintaining part also can be made to continue to fit in around the abdominal part of wearer.
The rear end of posterior lumbar stretchable sheet is not overlapping with absorber, and the anterior end of posterior lumbar stretchable sheet is overlapping with absorber.In the component forming disposable diaper, the rigidity of absorber is higher.Therefore, the part overlapping with absorber of posterior lumbar stretchable sheet is shunk than not overlapping with the absorber part difficulty of posterior lumbar stretchable sheet.
Thus, the rear end of posterior lumbar stretchable sheet is easy to shrink than the anterior end of posterior lumbar stretchable sheet relatively, and what can play side, front waist area further when dressing mentions effect.
Low rigidity portion is provided with in the rear end of absorber.By being provided with this low rigidity portion, thus the rear end of absorber is easily launched in the width direction, when dressing, the rear end of waist stretchable sheet is easier to extend along product width direction.Thus, under the state that disposable diaper is worn on wearer, can play further based on posterior lumbar stretchable sheet side, front waist area mention effect.
The anterior end that there is disposable diaper is configured in the situation on the convex camber of the abdominal part of wearer.Now, can expect, if Attacking Midfielder end is parallel with width, then can not along the curved shape bloated of abdominal part.But, by making anterior end be this curved shape, anterior end can be configured along the convex camber of abdominal part.
Under the naturalness of disposable diaper, the product length direction of extension is centrally located at center, product length direction than base portion by the position outside product length direction.That is, under the naturalness of disposable diaper, the extension of magic tape to extend direction not parallel with product width direction, but to tilt outside product length direction along with going outside width inside width.
Because the extending area of magic tape is in leaning on the position outside length direction than base portion, therefore, under the state this magic tape being bonded to front side, be easy to extension is configured at than the position of base portion by crotch side.Therefore, the power of mentioning based on magic tape is easy to act on rear side and upside.
Back side film is configured at rear end than disposable diaper by the position inside product length direction.With do not configure opaque liquid back sheet part compared with, the rigidity being configured with the part of the back sheet of opaque liquid is higher and not easily extend.
The rear end of disposable diaper is easy to launch in the width direction, when dressing, the rear end of waist stretchable sheet can be made to extend further in the width direction, and when dressing, what can play side, front waist area further mentions effect.
(4) other embodiments
As mentioned above, disclose content of the present invention by embodiments of the present invention, but should not be construed form the disclosure the discussion of a part and accompanying drawing for limiting the present invention.To those skilled in the art, various replacement embodiment, embodiment and application technology can be specified from the disclosure.
In variation, also can be, posterior lumbar stretchable sheet configure in the mode overlapping with waistline maintaining part.
In variation, both can be, posterior lumbar stretchable sheet configures in not overlapping with absorber mode, also can be, front side waist portion stretchable sheet configures in the mode overlapping with absorber.
In variation, also can be, not form Low rigidity region at absorber 40.
In variation, can be, disposable diaper have front side waist portion stretchable sheet yet.
In variation, under the naturalness of disposable diaper, both can align with the center, product length direction of base portion in the center, product length direction of extension on product length direction, also can be positioned at center, product length direction than base portion by the position inside product length direction.
In variation, back side film both can extend to the rear end of disposable diaper, also can extend to the anterior end of disposable diaper, can also extend to the end, product width direction of disposable diaper.
As mentioned above, certainly, the present invention is included in this various embodiments etc. do not recorded.Thus, protection scope of the present invention is only limited by the technical characteristic of the claims gone out according to described explanation reasonable generalization.
In addition, by the full content of No. 2013-156030th, Japan's patent application (application on July 26th, 2013) by referring to enrolling present specification.
utilizability in industry
A kind of disposable diaper that suitably can cover the convex camber of the abdominal part of wearer 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; 40, absorber; 40a, absorbent core; 40b, core covering; 50, positive dough sheet; 60, outer load; 60a, back sheet; 70, flank; 75, leg pars contractilis; 75F, anterior end; 75R, rear end; 77, auxiliary telescopic portion; 77F, anterior end; 77R, rear end; 80, leg side rivel; 81, elastic component; 85, posterior lumbar stretchable sheet; 85F, anterior end; 85R, rear end; 86, front side waist portion stretchable sheet; 86F, anterior end; 86R, rear end; 90, magic tape; 91, substrate sheets; 92, hook tabs; 93, base portion; 94, extension; 95, target portion; 110, low rigidity portion; L, product length direction; W, product width direction.

Claims (7)

1. a disposable diaper, it comprises: front waist area; Rear waist area; Lower crotch region, it is between described front waist area and described rear waist area; Product length direction, its from described front waist area towards described rear waist area; Product width direction, it is orthogonal with described product length direction; Absorber, it crosses over described lower crotch region, and extends at least one in described front waist area and described rear waist area; A pair magic tape, it is configured at the outboard end on the product width direction of described rear waist area, for being bonded to described front waist area; And waist stretchable sheet, it crosses over the center in the product width direction of disposable diaper, and has retractility on described product width direction, wherein,
Described waist stretchable sheet has the posterior lumbar stretchable sheet of the rear end being configured at described disposable diaper,
The described rear end of described disposable diaper has the curved shape caved in than the inner side in product length direction described in lateral, product width direction at center, product width direction under the naturalness of described disposable diaper.
2. disposable diaper according to claim 1, wherein,
This disposable diaper comprises waistline maintaining part, and this waistline maintaining part extends along product width direction in described front waist area and described rear waist area, for disposable diaper being held in the health of wearer,
Described posterior lumbar stretchable sheet configures in the mode overlapping with described waistline maintaining part.
3. disposable diaper according to claim 1 and 2, wherein,
Described absorber is configured at described rear end than described rear waist area by the position inside product length direction, and the anterior end of described posterior lumbar stretchable sheet configures in the mode overlapping with described absorber.
4. disposable diaper according to any one of claim 1 to 3, wherein,
Be provided with Low rigidity region at described absorber, the weight per unit area in this Low rigidity region is lower than the weight per unit area at other positions of absorber, or this Low rigidity region does not exist absorbent core,
Described Low rigidity region is the shape that the length on product width direction goes towards side, described front waist area from the product width direction of the rear end of described absorber central authorities to shorten.
5. disposable diaper according to any one of claim 1 to 4, wherein,
Described waist stretchable sheet has the front side waist portion stretchable sheet of the anterior end being configured at described disposable diaper,
The anterior end of described disposable diaper has the curved shape caved in than the inner side in product length direction described in lateral, product width direction at center, product width direction under the naturalness of described disposable diaper.
6. disposable diaper according to any one of claim 1 to 5, wherein,
This disposable diaper at least in the rear waist area is provided with outer load, and this outer load is configured in the side, non-skin contact face of described absorber,
Described magic tape comprises: base portion, and it is overlapping with described outer load; And extension, it extends to than the position of described outer load by the outside in described product width direction,
Under the naturalness of described disposable diaper, the center than the described product length direction of described base portion of being centrally located in the described product length direction of described extension is by the position in the outside in described product length direction.
7. disposable diaper according to any one of claim 1 to 6, wherein,
This disposable diaper at least in the rear waist area is provided with the back side film of opaque liquid, and the back side film of this opaque liquid is configured in the side, non-skin contact face of described absorber,
Described back side film is configured at described rear end than described rear waist area by the position inside product length direction.
CN201480042310.8A 2013-07-26 2014-07-11 Disposable diaper Active CN105407849B (en)

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PCT/JP2014/068593 WO2015012129A1 (en) 2013-07-26 2014-07-11 Disposable diaper

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WO2015012129A1 (en) 2015-01-29
KR102312228B1 (en) 2021-10-14
JP6193666B2 (en) 2017-09-06
CN105407849B (en) 2018-09-14
JP2015024048A (en) 2015-02-05
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TW201529056A (en) 2015-08-01
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MY168983A (en) 2019-01-29
PH12016500186A1 (en) 2016-05-02

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