CN105705123A - Pants-type disposable absorbent article - Google Patents

Abstract

Provided is a pants-type disposable absorbent article whereby leakage of excrement from a waist opening can be prevented. A pants-type diaper (10) that: includes a front waist area (14), a rear waist area (15), a crotch area (16) positioned between the front and rear waist areas, and an absorbent core (58) positioned in at least the crotch area; and has a waist opening (22) and a pair of leg openings (23) demarcated by the joining of both side edges (18c, 18d, 19c, 19d) of the front and rear waist areas to each other. The separation distance (L1) in the vertical direction, from an outer edge (28b) of a leak-prevention sheet in the front waist area to a front opening edge, is greater than the separation distance (L2) in the vertical direction, from an outer edge (29b) of a leak-prevention sheet in the rear waist area to a rear opening edge. The separation distance (L3) in the vertical direction from a front edge of the absorbent core to the front opening edge is less than the separation distance (L5) in the vertical direction from the rear edge of the absorbent core to the rear opening edge.

Description

The disposable absorbent article of Briefs type

Technical field

The present invention relates to the disposable absorbent article of the Briefs types such as disposable urine napkin, disposable toilet training trousers, disposable incontinence trousers。

Background technology

In the past, it is known to the disposable absorbent article of Briefs type, there is longitudinal direction and the transverse direction orthogonal with longitudinal direction, comprise skin opposite face and at the non-skin opposite face of its opposition side, front waist region, rear waist region, crotch region between described front waist region and the absorbent core being located at least in described crotch region, by the edge, both sides of described front waist region is bonded with each other, thus delimiting waist opening and a pair leg opening。Such as, in patent documentation 1, disclose following absorbent commodity: in described longitudinal direction, described absorbent core extends to described front waist region till playing near the end of waist opening from described crotch region, described front waist region contains the liquid permeable top sheet being configured at skin opposite face and is configured at the opaque liquid tergite of non-skin opposite face, in described longitudinal direction, described opaque liquid tergite is made more to extend than described liquid permeable top sheet, end in described front waist region, the part that extends making opaque liquid sheet is turned back to the skin opposite face of described liquid permeable top sheet, this is extended part and is fixed on liquid-permeable sheet。

At first technical literature

Patent documentation

Patent documentation 1: Japanese Patent Publication 03-122823 publication

Summary of the invention

The problem that invention to solve

Absorbent commodity disclosed in patent documentation 1, due to make the opaque liquid sheet of opaque liquid tergite extend part to the skin opposite face of liquid permeable top sheet turn back by this extend part be fixed on liquid-permeable sheet, therefore, it is possible to suppress the situation of the Excreta neighbouring leakage from the end the longitudinal direction of front waist region。

But, for the baby that still can not stand voluntarily, most time with face upward to posturizing sleep, and empty the bowels continually, and the situation draining soft stool be in the majority。

As disclosed in patent documentation 1, till described absorbent core is played near the opening ora terminalis of the part forming described waist opening from described crotch region to rear waist region extend configure time, then the rigidity of absorbent structure is big, elongation stress if, with elastomer makes this position shrink, then can form big fold or protuberance, absorbent commodity is not in close contact with waist, between the waist and absorbent commodity of wearer, produce gap, there is the hidden danger that Excreta leaks from opening ora terminalis。

It is an object of the invention to the absorbent commodity that improvement is conventional, it is provided that be prevented from the disposable absorbent article of the Briefs type that Excreta leaks from waist opening。

For solving the means of problem

In order to solve described problem, first invention has longitudinally and the transverse direction orthogonal with this longitudinal direction, there is skin opposite face and the non-skin opposite face in the opposition side of this skin opposite face, comprise front waist region, rear waist region, it is positioned at the crotch region between described front waist region, and it is located at least in the absorbent core of described crotch region, by making the edge, both sides of described front waist region be bonded with each other, thus delimiting waist opening and a pair leg opening, the disposable absorbent article of described Briefs type is characterised by, described front waist region comprises the open front ora terminalis of the part delimiting described waist opening, the front waist that can stretch and be positioned at described open front ora terminalis side along waistline direction keeps region, and it is positioned at the anti-leakage sheet of the described non-skin opposite face side of described absorbent core, described rear waist region comprises the after-opening ora terminalis of the part delimiting described waist opening, the back lumbar part that can stretch and be positioned at described after-opening ora terminalis side along waistline direction keeps region, and it is positioned at the described anti-leakage sheet of the described non-skin opposite face side of described absorbent core, the size of space described longitudinal direction till playing described open front ora terminalis from the external end edge of the described anti-leakage sheet of described front waist region play described after-opening ora terminalis than the external end edge from the described anti-leakage sheet of described rear waist region till described longitudinal direction on the size of space big, the size of space described longitudinal direction till playing described open front ora terminalis from the described front-end edge of described absorbent core is less than the size of space in the described longitudinal direction till playing described after-opening ora terminalis from the described end edge of described absorbent core。

In order to solve described problem, second invention has longitudinally and the transverse direction orthogonal with this longitudinal direction, there is skin opposite face and the non-skin opposite face in the opposition side of this skin opposite face, comprise front waist region, rear waist region, it is positioned at the crotch region between described front waist region, and it is located at least in the absorbent core of described crotch region, by making the edge, both sides of described front waist region be bonded with each other, thus delimiting waist opening and a pair leg opening, the disposable absorbent article of described Briefs type is characterised by, described rear waist region comprises the opening ora terminalis of the part forming described waist opening, the waist stretching region can stretched along waistline direction, form the sheet material of described waist stretching region, and it is positioned at the anti-leakage sheet of the described non-skin opposite face side of described absorbent core, described anti-leakage sheet extends to described opening ora terminalis side than the end edge of described absorbent core, described waist stretching region is at least formed between described end edge and the described opening ora terminalis of described absorbent core, the longitudinal size of the part extended to described opening ora terminalis side from the described end edge of described absorbent core is bigger than the size in the described longitudinal direction of the described absorbent core described rear waist region。

The effect of invention

The pull-on disposable absorbent commodity comprising more than one embodiment according to disclosed first invention, owing to the size of space in the longitudinal direction till the front-end edge from forward open end genesis to absorbent core is less than the size of space in the longitudinal direction till the end edge from rear open end genesis to absorbent core, it is possible to suppress back lumbar part to keep the situation that region is left from the skin of wearer because of the rigidity of absorbent core, the rear waist region of absorbent commodity is made to fit with the back of wearer。In addition, it is big that the size of space longitudinal direction till playing open front ora terminalis from the external end edge of the anti-leakage sheet of front waist region plays the size of space in the longitudinal direction till after-opening ora terminalis than the external end edge from the anti-leakage sheet of rear waist region, it is possible to suppress the leakage of the Excreta opening ora terminalis from rear waist region。

The pull-on disposable absorbent commodity comprising more than one embodiment according to disclosed second invention, longitudinal size of the part owing to extending from the end edge of absorbent core to opening ora terminalis side is bigger than the size of the longitudinal direction of the absorbent core in rear waist region, it is possible to suppress the situation that waist stretching region is left from the skin of wearer because of the rigidity of absorbent core, the rear waist region of absorbent commodity can be made to fit with the back of wearer, it is possible to suppress the leakage of the Excreta opening ora terminalis from rear waist region。

Accompanying drawing explanation

Accompanying drawing represents the specific embodiment of the present invention, but is not all the indispensable structure of invention, but comprises selective and preferred embodiment。

Fig. 1 indicates that the axonometric chart of the disposable urine napkin of an example of the disposable absorbent article of the Briefs type of the present invention, the first embodiment Briefs type。

Fig. 2 be each elastomer longitudinally with extending transversely to maximum elongation time (degree to the fold disappearance produced by the contraction of elastomer) the disrumpent feelings expansion plane graph in local of diaper。

Fig. 3 is the disrumpent feelings exploded perspective view in local of diaper。

Fig. 4 is the schematic sectional view of the IV-IV line along Fig. 2。

Fig. 5 is the schematic sectional view of the V-V line along Fig. 2。

Fig. 6 (a) is the disrumpent feelings enlarged drawing in local of rear waist region, and Fig. 6 (b) is the disrumpent feelings enlarged drawing in local of front waist region。

Fig. 7 is the axonometric chart observing the diaper worn state from front。

Fig. 8 is the axonometric chart observing the diaper worn state from the back side。

Fig. 9 is the schematic sectional view same with Fig. 4 of the diaper of the second embodiment。

Figure 10 is the schematic sectional view same with Fig. 5 of the diaper of the second embodiment。

Figure 11 is the local disrumpent feelings expansion plane graph same with Fig. 2 of the diaper of the 3rd embodiment。

Figure 12 is the axonometric chart same with Fig. 8 of the diaper of the 3rd embodiment。

Figure 13 is the schematic sectional view same with Fig. 4 of the diaper of the 4th embodiment。

Figure 14 is the schematic sectional view same with Fig. 5 of the diaper of the 4th embodiment。

Detailed description of the invention

Embodiment disclosed below relates to the disposable urine napkin of the Briefs type shown in Fig. 1～14, but is not all the structure that the present invention is indispensable, but comprises selective and preferred structure。

< the first embodiment >

With reference to Fig. 1～3, diaper 10 has longitudinal axis P and transverse axis Q, longitudinal Y and horizontal X and skin opposite face and is positioned at the non-skin opposite face of its opposition side, the elastic crotch sheet 13 of absorbent structure 11 that the elastic waist sheet 12 comprising the ring-type extended along waistline direction and the skin opposite face of elastic waist sheet 12 link and the skin opposite face side that is installed on elastic waist sheet 12。It addition, diaper 10 has front waist region 14, rear waist region 15 and the crotch region 16 between front waist region 14 and 15, and symmetrical relative to longitudinal axis P。

< elastic waist sheet >

Elastic waist sheet 12 have under the hip for absorbent structure 11 being fixed on wearer between elastic webbing function, there is the front waist sheet 18 forming front waist region 14 and form the back lumbar part sheet 19 of rear waist region 15。Front waist sheet 18 has the transverse rectangular shape delimited by interior ora terminalis 18a, external end edge 18b, both side edges 18c and 18d between interior external end edge 18a and 18b。Back lumbar part sheet 19 has the transverse rectangular shape delimited by interior ora terminalis 19a, external end edge 19b, both side edges 19c and 19d between interior external end edge 19a and 19b。The mutually corresponding both side edges 18c of front waist sheet 18,18d and the both side edges 19c of back lumbar part sheet 19,19d overlap each other, at longitudinally Y seam 20 place arranged intermittently by known means, such as heat embossing/coinging, the thermally welded means of sound wave etc. are utilized to link, thus delimiting waist opening 22 and a pair leg opening 23。Waist opening 22 is formed by the open front ora terminalis 22a on front waist sheet 18 and the after-opening ora terminalis 22b on back lumbar part sheet 19。In the present invention, comprise the waist opening 22 upper end by front waist sheet 18 align with the upper end of back lumbar part sheet 19 and the bottom of front waist sheet 18 align with the bottom of back lumbar part sheet 19 in the way of the diaper 10 that coincides with one another, and the diaper that the upper and lower end parts not comprising the front/back waist sheet 18,19 of one party vertically highlights relative to the upper and lower end parts of the front/back waist sheet 18,19 of the opposing party。Wherein, the upper and lower end parts of so-called front/back waist sheet 18,19 is in alignment with each other and includes the situation that the upper and lower end parts because of foozle vertically slightlys offset each other。Here " slightlyying offset " specifically refers to, and in the manufacture of diaper 10, the upper end of front/back waist sheet 18,19 offsets the situation within 10mm each other each other with bottom on longitudinal Y。It addition, in the present invention, front waist region 14,15 is the part linked its edge, both sides by seam 20, and interior ora terminalis 18a, 19a refer to the lower end of this linking part at seam 20 place, rather than leave this bond sites in the part of crotch region 16 side。

Front/back waist sheet 18,19 is respectively provided with the waist internal layer (waist inner layer piece) 24,25 being positioned at skin opposite face side and the waist outer layer (waist outer-skin sheet) 26,27 being positioned at non-skin opposite face side。The width dimensions of longitudinal Y of waist outer layer 26,27 is bigger than waist internal layer 24,25, extends to the outside of longitudinal Y further from external end edge 24a, 25a of waist internal layer 24,25。

< waist outer layer >

For waist outer layer 26,27, it is possible to use quality to be about 15-30g/m²SMS (spunbond, melt-blown, spunbond) fabric nonwoven cloth, spun-bonded non-woven fabrics, hot-wind nonwoven cloth, plastic sheet or described any fabric nonwoven cloth and plastic sheet laminate etc.。Waist internal layer 24,25 and waist outer layer 26,27 engage by coating the suitable bonding agent of the inner surface of at least one party, such as hot-melt adhesive or known thermally welded means。

< waist internal layer >

For waist internal layer 24,25, elastic fibrous nonwoven cloth can be used, for instance can have elastic fabric nonwoven cloth individually or they be formed in combination with spun-bonded fibre non-woven fabrics, melt blown fibrous nonwoven cloth, hot-rolling fabric nonwoven cloth, SMS fabric nonwoven cloth, airlaid fibrous non-woven fabrics and hot blast fabric nonwoven cloth etc. are known。Elastic non-woven cloth such as can be formed with the elastic resin formed by polyethylene kind, polyurethanes etc., the thermoplastic resin etc. that formed by polyethylene, polypropylene, polyester, propylene etc.。Non-elastic fiber non-woven fabrics can be used as waist internal layer 24,25, but as described later, owing to the waist internal layer 25 of rear waist region 15 is the part of the health directly contacting wearer, so in order to improve flexibility and skin feel, it is preferable that at least waist internal layer 25 is elastic fibrous nonwoven cloth。

< anti-leakage sheet >

With reference to Fig. 2 and 3, between waist internal layer 24,25 and waist outer layer 26,27, front waist region 14,15 horizontal X central part and be between waist outer layer 26,27 and enhancement Layer 30, be configured with front and back anti-leakage sheet 28,29。With reference to Figure 4 and 5, external end edge 28b, 29b of front and back anti-leakage sheet 28,29 extend opening ora terminalis 22a, 22b side forwards, backwards than front and back end wing flap 54a, 55a of absorbent structure 11。Interior ora terminalis 28a, 29a of front and back anti-leakage sheet 28,29 extend to crotch region 16 side than front and back ora terminalis 58a, 58b of absorbent core 58。Printing preferably in the non-skin opposite face of front and back anti-leakage sheet 28,29 can the pattern (not shown) of visuognosis from outside。

Before and after anti-leakage sheet 28,29 both can be formed with the sheet of the opaque liquid formed by the plastic material such as polyethylene film or polypropylene film and poisture-penetrability, it is also possible in order to improve liquid permeability and with such as water repellent-treated fabric nonwoven cloth formation。

With reference to Fig. 6 (a), (b), the size of space L1 longitudinal Y till playing open front ora terminalis 22a from the external end edge 28b of the front anti-leakage sheet 28 of front waist region 14 play after-opening ora terminalis 22b than the external end edge 29b from the rear anti-leakage sheet 29 of rear waist region 15 till longitudinal Y on size of space L2 big。Size of space L1 is such as 10～50mm, size of space L2 is such as 1～30mm。

The each waist elastics > of <

With reference to Figure 4 and 5, at front/back waist sheet 18,19, turn back to skin opposite face side in the position that extends of the waist outer layer 26,27 extended to the foreign side of longitudinal Y further from external end edge 24a, 25a of waist internal layer 24,25。In kink 26a, the 27a formed by turning back, a plurality of front/back waist elastomer 31,32 is contractably fixed with the state of elongation via suitable bonding agent, such as hot-melt adhesive。It addition, between waist outer layer 26,27 and absorbent structure 11, be configured with enhancement Layer 30 and the front and back anti-leakage sheet 28,29 of the elongate formed by fabric nonwoven cloth。Between enhancement Layer 30 and front and back anti-leakage sheet 28,29, a plurality of front/back waist elastomer 33,34 and front/back waist elastomer 35,36 are contractably fixed with the state of elongation via suitable bonding agent, such as hot-melt adhesive。

< front waist region >

Front waist region 14 has the outer Hookean region 37 of the front waist in open front ora terminalis 22a side, in the front waist of crotch region 16 side Hookean region 38 and in the outer Hookean region 37 of front waist and front waist front waist Elastic region 39 between Hookean region 38。The outer Hookean region 37 of front waist does not comprise absorbent core 58, Hookean region 38 comprises a part for absorbent core 58 in front waist Elastic region 39 and front waist。

It addition, front waist region 14 has the front waist stretching region 49a between the front-end edge 58a being formed at absorbent core 58 and open front ora terminalis 22a。

The outer Hookean region 37 of front waist has a plurality of front waist elastomer 31, and described a plurality of front waist elastomer 31 is certain size transversely X extension away from each other on longitudinal Y, for instance be wire, string-like or wire harness shape。

Front waist Elastic region 39 has a plurality of front waist elastomer 33, and described a plurality of front waist elastomer 33 is certain size transversely X extension away from each other on longitudinal Y, for instance be wire, string-like or wire harness shape。

In front waist, Hookean region 38 has a plurality of front waist elastomer 35, and described a plurality of front waist elastomer 35 is certain size transversely X extension away from each other on longitudinal Y, for instance be wire, string-like or wire harness shape。Additionally, in front waist outer Hookean region 37, front waist Hookean region 38, front waist Elastic region 39, it is also possible to give elasticity by configuring flexure strip, replace the configuration of the waist elastics 31,33,35 of such as wire, string-like or wire harness shape。

< rear waist region >

Rear waist region 15 has the outer Hookean region 40 of the back lumbar part in after-opening ora terminalis 22b side, in the back lumbar part of crotch region 16 side Hookean region 41 and in the outer Hookean region 40 of back lumbar part and back lumbar part back lumbar part Elastic region 42 between Hookean region 41。The outer Hookean region 40 of back lumbar part does not comprise absorbent core 58, although back lumbar part Elastic region 42 does not comprise absorbent core 58, but adjacent with the end edge 58b of absorbent core 58, Hookean region 41 comprises a part for absorbent core 58 in back lumbar part。

Having a plurality of rear waist elastic body 32 in the outer Hookean region 40 of back lumbar part, described a plurality of rear waist elastic body 32 is certain size transversely X extension away from each other on longitudinal Y, for instance be wire, string-like or wire harness shape。

Having a plurality of rear waist elastic body (rear waist elastic body) 34 in back lumbar part Elastic region 42, described a plurality of rear waist elastic body 34 is certain size transversely X extension away from each other on longitudinal Y, for instance be wire, string-like or wire harness shape。Rear waist elastic body 34 is configured at the non-skin opposite face side of absorbent structure 11。

Having a plurality of rear waist elastic body 36 in back lumbar part in Hookean region 41, described a plurality of rear waist elastic body 36 is certain size transversely X extension away from each other on longitudinal Y, for instance be wire, string-like or wire harness shape。Additionally, in back lumbar part outer Hookean region 40, back lumbar part Hookean region 41, back lumbar part Elastic region 42, it is also possible to give elasticity by configuring flexure strip, replace the configuration of the waist elastics 32,34,36 of such as wire, string-like or wire harness shape。

< waist elastics >

The elongation stress to horizontal X elongation of the outer Hookean region 37,40 of front/back waist is set to bigger than the elongation stress to horizontal X elongation in front/back waist Elastic region 39,42。In the present embodiment, front/back waist elastomer 31,32 be by fiber number be 470～940dtex be such as that the elastomeric material of wire, string-like or wire harness shape extends about 1.6～3.5 times and the parts contractably installed。Front/back waist elastomer 33,34 is to be such as that the elastomeric material of wire, string-like or wire harness shape extends about 1.8～2.8 times and the parts contractably installed by fiber number 310～780dtex。By like this fiber number of front/back waist elastomer 31,32 and elongation multiplying power being set to bigger than front/back waist elastomer 33,34 such that it is able to the elongation stress making the outer Hookean region 37,40 of front/back waist is bigger than the elongation stress in front/back waist Elastic region 39,42。

Specifically, outer Hookean region 37,40 elongation stress of 171% when maximum elongation of front/back waist is about 0.7～1.7N/mm, and front/back waist Elastic region 39,42 elongation stress of 171% when maximum elongation is about 0.4～1.4N/mm。So, the outer Hookean region 37,40 of front/back waist has relatively large elongation stress, fits to the body steadiness with wearer, therefore, even if being set to relatively low by the elongation stress in leg elastic region 62, it is also possible to prevent diaper 10 from offseting downwards。In addition it is also possible to the elongation stress of Hookean region 37,40 is equal with the elongation stress in front/back waist Elastic region 39,42 outside making front/back waist。

The situation of the material that difference is not limited to use the fiber number of elastomer, elongation multiplying power is different that elongation stress is set。For example, it is also possible to reach in the following way: formed elastomer by different materials；And difference is set with in being formed from the same material elastomer the spacing distance each other of the elastomer in each Hookean region。Of course it is also possible to the spacing distance by the material used, the fiber number of elastomer and elongation multiplying power, elastomer is appropriately combined, thus the desired elongation stress set in each Hookean region。

The assay method > of < elongation stress

In front/back waist is outer, the elongation stress in Elastic region 37～40 uses the cupping machine (INSTRON model: 5564) that company limited of Instron Japan (Japanese: イ Application ス ト ロ Application ジ ャ パ Application カ Application パ ニ リ ミ テ ッ De) manufactures to measure as follows。First, in cupping machine, make the size of space R between lower chuck on a pair (fixture) become and size that the size (distance between the side seam portion of lumbar region) of diaper horizontal X in its natural state is identical, be measured when circulation pattern, draw speed 100mm/min。

Then, cut, in the mode not comprising absorbent structure 11, the mensuration sample that the length dimension of horizontal X is 3～5cm from diaper 10, sample transversely X elongation will be measured, until the state that the fold produced by the contractility of each waist elastics disappears, the size R1 (not shown) during using the size between the seam 20 of the edge, both sides under this state as maximum elongation。Additionally, sample used in this full-size R1 is not used in the mensuration of elongation stress。Then, the both side edges portion of the sample cut from diaper 10 is individually fixed in upper lower chuck。In this condition, the mode that above lower chuck leaves mutually tensile sample along the vertical direction, until sample is elongated to required length。

It addition, using measure in advance maximum elongation time size R1 as 100%。Start to measure from jaw separation from R, till the size of space being elongated to by sample between chuck becomes about the 87% of full-size R1。Then, sample by be elongated to full-size R1 about 87% gradually tapers up, elongation stress when spacing distance between lower chuck becomes about 71% in mensuration, and the value of the per unit width (about 30mm) conversed by the width based on sample is as measured value (N/30mm)。

The elastomeric material that the front/back waist elastomer 35,36 that in front/back waist, Hookean region 38,41 comprises is such as wire, string-like or wire harness shape that fiber number is about 310～620dtex extends about 1.1～3.5 times and the parts contractably installed。In front/back waist, Hookean region 38,41 elongation stress of 171% when maximum elongation is about 0.2～1.2N/mm。About the elongation stress of Hookean region in front/back waist 38,41, cut the sample of about 30mm from front/back waist sheet 18,19, and be measured in the same manner as the elongation stress in the outer Hookean region 37,40 of front/back waist and front/back waist Elastic region 39,42。

Bigger than front/back waist elastomer 35,36 by the fiber number and elongation multiplying power that make front/back waist elastomer 31,32 such that it is able to the elongation stress making the elongation stress (hot strength) of Hookean region 38,41 in front/back waist Hookean region 37,40 outer than front/back waist is low。

By make front/back waist elastomer 33,34 fiber number and elongation multiplying power bigger than front/back waist elastomer 35,36 such that it is able to the elongation stress (hot strength) making Hookean region 38,41 in front/back waist is lower than the elongation stress in front/back waist Elastic region 39,42。

In diaper, when from when arranging a plurality of waist elastics to the opening ora terminalis side of waist opening near absorbent core, it is positioned at the waist elastics of the vicinity of absorbent core to be subject to the impact of the high rigidity of the comparison of absorbent structure and be difficult to shrink, on the other hand, required contractility is played by being positioned at the waist elastics of opening ora terminalis side, thus the horizontal size in the region of opening ora terminalis side diminishes, the body fit of front/back waist sheet and wearer。In the present embodiment, the outer Hookean region 37,40 of front/back waist does not comprise absorbent core 58, the outer Hookean region 37,40 of front/back waist is formed between front and back ora terminalis 58a, 58b of absorbent core 58 and open front ora terminalis 22a, 22b, therefore, make the impact that the rigidity of absorbent core 58 causes for front/back waist elastomer 31～34 make front/back waist elastomer 31～34 stretch littlely。Therefore, the size in the waistline direction that the size being configured with the front/back waist waistline direction of Hookean region 37,40 outward of front/back waist elastomer 31～34 compares front and back ora terminalis 58a, 58b of being positioned at absorbent core 58 is little, so the body fit of the outer Hookean region 37,40 of front/back waist and wearer。Especially, back concavo-convex for wearer, owing to the outer Hookean region 37,40 of front/back waist stretches, so also inhibits the situation producing gap between back and back lumbar part sheet 19, it is possible to suppress the leakage of the Excreta after-opening ora terminalis 22b from rear waist region 15。This is also same in front waist region 14。

Due to front/back waist elastomer 31～34 in the outer Hookean region 37,40 of front/back waist and front/back waist Elastic region 39,42 transversely X extend continuously, so these front/back waist elastomers 31～34 are continuous along waistline direction。Therefore, in the outer Hookean region 37,40 of the front/back waist of front/back waist sheet 18,19 and front/back waist Elastic region 39,42, it is possible to make diaper 10 push from the complete cycle of waistline to wearer, it is possible to make the body fit of diaper 10 and wearer。

In the front waist of front waist region 14 in Hookean region 38, front waist elastomer 35 is not at the central authorities of the horizontal X of absorbent structure 11, is absent from the hidden danger that its contractility acts on absorbent structure 11 and produces to become the fold of the reason of the leakage of body fluid。

In the back lumbar part of rear waist region 15 in Hookean region 41, rear waist elastic body 36 is not at the central authorities of the horizontal X of absorbent structure 11, is absent from the hidden danger that its contractility acts on absorbent structure 11 and produces to become the fold of the reason of the leakage of body fluid。

Additionally, elastic waist sheet 12 has waist and keeps region 51a and waist middle section 51b, described waist keeps region 51a to extend specific length dimension L9 to crotch region 16 side longitudinally Y from the opening ora terminalis 22a of front waist sheet 18, described waist middle section 51b keeps the lower end genesis of region 51a to extend specific length dimension L10 to crotch region 16 side longitudinally Y from waist, and with waist keep region 51a adjacent (with reference to Fig. 1,4 and 5)。

Waist keeps region 51a to be formed between the front-end edge 58a of absorbent core 58 and open front ora terminalis 22a on front waist sheet 18, and the region set according to the length dimension L9 on longitudinal Y, the region set to crotch region 16 side according to length dimension L9 from after-opening ora terminalis 22b on back lumbar part sheet 19。Waist keeps the length dimension L9 of longitudinal Y of region 51a such as equal with the length dimension of waist middle section 51b。

Specifically, length dimension L9 is 10～60mm, and length dimension L10 is 10～60mm。

Waist keeps region 51a to be kept the back lumbar part of region 49b and back lumbar part sheet 19 side to keep region 50b to be formed by the front waist of front waist sheet 18 side。Front waist maintenance region 49b and front waist stretching region 49a is identical region。

Front waist keeps region 49b not comprise absorbent core 58, body side liner 59 in stacking waist internal layer 24, waist outer layer 26, enhancement Layer 30, front anti-leakage sheet 28, absorbent structure 11, outer covering layer 60 and anti-leakage sheet 61 and constitute。Therefore, front waist keeps a part of region 49b to have the part 7 sheet material stackings constituted。It addition, front waist keeps region 49b to comprise such as 3 front waist elastomers 31 and 1 front waist elastomer 33。

In rear waist region 15, region 50b is kept to comprise such as 6 front waist elastomers 32 with the length dimension L9 back lumbar part set from after-opening ora terminalis 22b, do not comprise the absorbent core 58 of absorbent structure 11, body side liner 59, outer covering layer 60, anti-leakage sheet 61 and enhancement Layer 30, stacking waist internal layer 25, waist outer layer 27 and rear anti-leakage sheet 29 and constitute。Therefore, back lumbar part keeps region 50b to have the part 4 sheet material stackings constituted。Therefore, back lumbar part keeps region 50b to have constituting the part that front waist keeps the number of sheet material of region 49b fewer than the number of sheet material constituting back lumbar part maintenance region 50b。Therefore, the back lumbar part that can make back lumbar part sheet 19 keeps the gauge of the region 50b gauge than the front waist of front waist sheet 18 maintenance region 49b little, it is possible to back lumbar part sheet 19 is strongly pushed to the health of wearer, on the other hand, it is possible to make front waist sheet 18 push in the way of the health of wearer not being applied too much power in front waist region 14。Above-mentioned effect and effect also are able to reach in the following way: to make formation back lumbar part keep the mass ratio of per unit area of sheet material of region 50b to be formed in the way of front waist keeps the quality of per unit area of sheet material of region 49b little, form front/back waist sheet 18,19。

Waist middle section 51b to extend the length dimension L10 of regulation and to keep region 49b to configure in the way of adjoining with front waist on front/back waist sheet 18,19 from the lower end genesis of front waist maintenance region 49b to crotch region 16 longitudinally Y。Therefore, waist middle section 51b is formed by the identical front waist middle section 49c in the position on longitudinal Y and back lumbar part sheet 19。

Front waist middle section 49c is formed in the way of a part and 1 front waist elastomer 33 of the front-end edge 58a that comprises such as absorbent core 58。

Back lumbar part middle section 50c is formed in the way of not comprising absorbent core 58 and comprising such as 1 rear waist elastic body 34。

Owing to as described above the fiber number of front/back waist elastomer 31,32 and elongation multiplying power being set to bigger than the fiber number of front/back waist elastomer 33,34 and elongation multiplying power, therefore, it is possible to make the front/back waist of the per unit length on longitudinal Y keep the elongation stress in the elongation stress in waistline direction of region 49b, 50b waistline direction than front/back waist middle section 49c, 50c of the per unit length on longitudinal Y big。

Therefore, keep in region 49b, 50b at the front/back waist that elongation stress is big, the body steadiness ground laminating of front/back waist sheet 18,19 and wearer, it is possible to the elongation stress by front/back waist middle section 49c, 50c is set to relatively small, it is possible to the elongation stress in leg elastic region 62 is set to relatively small。Therefore, even if the elongation stress in leg elastic region 62 is low, it is also possible to prevent diaper 10 skew downwards。

< crotch sheet >

Elastic crotch sheet 13 is formed by the crotch sheet material 44 of opaque liquid。Crotch sheet material 44 can use the sheet member of the single or multiple lift that the plastic sheeting by various known fabric nonwoven cloths or poisture-penetrability formed。

Elastic crotch sheet 13 has rear ends 46,47 and the pars intermedia 48 between rear ends 46,47。Rear ends 46,47 is via being positioned at the skin opposite face that its non-skin opposite face side, coating hot-melt adhesive engaging zones is fixed on ora terminalis 18a, 19a side of front/back waist sheet 18,19。It addition, pars intermedia 48 is held within the absorbent structure 11 of its skin opposite face side。

< absorbent structure >

Absorbent structure 11 has the gasket shape of lengthwise, comprises rear ends 54 and 55, pars intermedia 56, the absorbent core 58 at least extended at crotch region 16 longitudinally Y, the body side liner (top flat) 59 of skin opposite face side being positioned at absorbent core 58 and is positioned at the outer covering layer (tergite) 60 of non-skin opposite face side of absorbent core 58 and is positioned at the anti-leakage sheet 61 of non-skin opposite face side of outer covering layer 60。The substantially overall of non-skin opposite face in absorbent structure 11 is coated with suitable bonding agent, for instance hot-melt adhesive is coated with known pattern。Rear ends 54,55 is fixed on the skin opposite face of front/back waist sheet 18,19 respectively via this bonding agent, and pars intermedia 56 is fixed on the skin opposite face of elastic crotch sheet 13 via this bonding agent。As it is shown on figure 3, the skin opposite face of the waist internal layer 24 of front waist sheet 18 is fixed in the leading section 54 of absorbent structure 11, rearward end 55 is fixed on the skin opposite face of waist outer layer 27 between the waist internal layer 25 and waist outer layer 27 of back lumbar part sheet 19。The skin opposite face of waist internal layer 24 is fixed in the leading section 54 of absorbent structure 11, thus, has soft waist internal layer 24 and the direct skin contact of wearer of telescopic resilience, improves skin feel。Additionally, owing to rearward end 55 is fixed between waist internal layer 25 and waist outer layer 27, even if so the diffusion of body fluids being drained, being diffused into the rearward end 55 of the absorbent structure 11 being positioned at rear waist region 15 from crotch region 16, it is also possible to prevent the direct skin contact of body fluid and wearer。

The quality of absorbent core 58 is about 300～900g/m²By core (not shown) with cover the fabric nonwoven cloth (not shown) of liquid permeability of core and constitute, this core by timber fluff pulp, superabsorbent polymer particles (SAP) and alternatively and the mixing of the thermally welded property staple fibre contained and formed。For body side liner 59, it is possible to use quality to be about 10～30g/m²The various known fabric nonwoven cloths such as spun-bonded fibre non-woven fabrics or SMS fabric nonwoven cloth of liquid permeability。For outer covering layer 60, it is possible to use quality to be about 10～30g/m²The spun-bonded non-woven fabrics of opaque liquid, SMS non-woven fabrics, the plastic sheet of poisture-penetrability or fabric nonwoven cloth and plastic sheet laminate etc.。

Absorbent core 58 longitudinally Y extends continuously, and on longitudinal Y, the position than front-end edge 58a, the position of end edge 58b configures on the lower。

The leading section 54 of absorbent structure 11 has the apex-flaps 54a formed by body side liner 59, outer covering layer 60 and anti-leakage sheet 61。The rearward end 55 of absorbent structure 11 has the rear end wing flap 55a formed by body side liner 59, outer covering layer 60 and anti-leakage sheet 61。

With reference to Fig. 6 (a), on longitudinal Y, size L4 longitudinal for the size of space L3 longitudinal Y till playing open front ora terminalis 22a from the front-end edge 58a of absorbent core 58 than the absorbent core 58 of front waist region 14 is little。

With reference to Fig. 6 (b), on longitudinal Y, bigger than the size L6 of longitudinal Y of the absorbent core 58 of rear waist region 15 from the size L5 of the longitudinal direction of the end edge 58b of absorbent core 58 part extended to rear open end edge 22b side。

It addition, in front waist region 14, play open front ora terminalis 22a from the front-end edge 58a of absorbent core 58 till longitudinal Y size of space L3 less than the size of space L5 longitudinal Y in rear waist region 15, from the end edge 58b of absorbent core 58 to after-opening ora terminalis 22b。

In this diaper 10, due to bigger than the size L6 of longitudinal Y of the absorbent core 58 in rear waist region 15 from the size L5 of the longitudinal direction of the end edge 58b of absorbent core 58 part extended to rear open end edge 22b side, it is possible to make the length dimension of longitudinal Y of the relatively larger absorbent core 58 of the rigidity in rear waist region 15 little, and the length dimension (L5 (with reference to Fig. 6)) being absent from longitudinal Y of the back lumbar part stretching region 50a of absorbent core 58 in rear waist region 15 can be made big。Therefore, as shown in Figure 8, the area being absent from the back lumbar part stretching region 50a of absorbent core 58 becomes big, so will not produce gap between recess and the back lumbar part stretching region 50a of back lumbar part sheet 19 at the back of wearer, it is possible to prevent Excreta from leaking from the after-opening ora terminalis 22b of waist opening 22。

For the waist of wearer, abdominal part highlights outward, and on the other hand, inwardly just cave in back。When wearer wears diaper, the front/back waist sheet of diaper applies along direction prominent outward power, but front/back waist sheet is pushed on waist due to the contractility etc. of waist elastics。In this diaper 10, due to the size of space L3 on the longitudinal Y till playing open front ora terminalis 22a from the front-end edge 58a of absorbent core 58 less than the size of space L5 on the longitudinal Y till playing after-opening ora terminalis 22b from the end edge 58b of absorbent core 58 (with reference to Fig. 6), therefore, as shown in FIG. 7 and 8, the length dimension L4 of longitudinal Y of absorbent core in front waist region 14 can be made bigger than the length L6 of longitudinal Y of the absorbent core in rear waist region 15, make the rigidity of front waist sheet 18 collided with abdominal part relatively large, on the other hand, the rigidity of back lumbar part sheet 19 collided with back can be made relatively small。Therefore, in abdominal part side prominent outward, it is possible to front waist sheet 18 ventrad making rigidity relatively larger weaker pushes, on the other hand, in the side, back with the inwardly part of side's depression, it is possible to the back lumbar part sheet 19 making rigidity smaller utilizes rear waist elastic body 32,34,36 strongly to push。In this diaper 10, owing to considering the concavo-convex of waistline, make varying in size of the size of the rigidity of front waist sheet 18 and the rigidity of back lumbar part sheet 19, front/back waist sheet 18,19 is pushed to wearer, therefore, it is possible to prevent diaper 10 from offseting downwards relative to the waist of wearer。Except this effect, the size of space L2 on longitudinal Y till playing after-opening ora terminalis 22b due to the size of space L1 on the longitudinal Y till playing open front ora terminalis 22a from the external end edge 28b of the front anti-leakage sheet 28 of front waist region 14 than the external end edge 29b from the rear anti-leakage sheet 29 of rear waist region 15 is big, it is possible to make the length dimension of longitudinal Y of rear anti-leakage sheet 29 in rear waist region 15 big, leak therefore, it is possible to be reliably prevented Excreta from the after-opening ora terminalis 22b of waist opening 22。

Each size > of < diaper

With reference to Fig. 2, preferably, size L11 on longitudinal Y of diaper 10 is about 350～600mm, size W1 on the horizontal X of diaper 10 is about 300～430mm, size L12 on longitudinal Y of crotch region 16 is about 180～300mm, and size on longitudinal Y of the lateral margin 18d of front waist region 14 (equivalently-sized with on longitudinal Y of the lateral margin 19d of rear waist region 15) L13 is about 60～130mm。

< elastic sides wing flap >

With reference to Fig. 2 and 3, elastic crotch sheet 13 also has a pair elastic sides wing flap 43 in the outside of the horizontal X being positioned at the both sides genesis from absorbent structure 11。Elastic sides wing flap 43 is made up of bending part and a plurality of leg elastics 52, and the both sides of crotch sheet material 44 are bent and formed by described bending part, and described a plurality of leg elastics 52 is arranged in this kink, and longitudinally Y extends, for string-like or wire harness shape。The rear ends (part for the rear ends 46,47 of elastic crotch sheet 13) of elastic sides wing flap 43 is fixed to the outer direction of horizontal X。Elastic sides wing flap 43 have the lateral margin 11c being configured at absorbent structure 11 inelastic region 63 and be positioned at inelastic region 63 horizontal X outside, the leg elastic region 62 that is configured with leg elastics 52。

In leg elastic region 62, it is configured with and leaves with certain size each other on horizontal X and the leg elastics 52 of longitudinally a plurality of such as wire, string-like or the wire harness shape that Y extends。Additionally, elasticity can also be given by configuring flexure strip in leg elastic region 62, thus replacing the configuration of a plurality of leg elastics 52 of wire, string-like or wire harness shape。

Leg elastics 52 is that the elastomeric material of such as wire, string-like or wire harness shape that fiber number is 210～470dtex is extended about 1.8～3.0 times and the parts contractably installed。

When can cut the sample of about 30mm from elastic sides wing flap 43, the elongation stress in leg elastic region 62 measures in the same manner as the elongation stress of the outer Hookean region 37,40 of front/back waist etc.。It addition, when cutting the sample of about 30mm, cut sample and measure extending force in the way of the constant dimension of longitudinal Y, the width that the value of this mensuration is converted into sample is elongation stress when 30mm。

Bigger than front/back waist elastomer 31,32 by the fiber number and elongation multiplying power that make leg elastics 52 such that it is able to the extending force making the extending force in leg elastic region 62 Hookean region 37,40 outer than front/back waist is low。

The outer Hookean region 37,40 of front/back waist applies power at front/back waist sheet 18,19 in the way of transversely X is flexible, on the other hand, in leg elastic region 62, in the way of longitudinally Y is flexible, applies power at elastic crotch sheet 13。The power of both is applied at the position that front/back waist sheet 18,19 and elastic crotch sheet 13 intersect。Diaper 10 according to present embodiment, owing to the elongation stress making the outer Hookean region 37,40 of front/back waist is bigger than the elongation stress in leg elastic region 62, suppress stretching of outer Hookean region 37, the 40 longitudinally Y of front/back waist, on the other hand, can stretch to horizontal X, it is possible to make the waistline of diaper 10 and wearer fit。

By make front/back waist elastomer 33,34 fiber number and elongation multiplying power bigger than leg elastics 52 such that it is able to the extending force making leg elastic region 62 is lower than the extending force in front/back waist Elastic region 39,42。

To apply power at front/back waist sheet 18,19 in the way of front/back waist Elastic region 39,42 transversely X is flexible, on the other hand, to apply power at elastic crotch sheet 13 in the way of leg elastic region 62 longitudinally Y is flexible。The power of both is applied at the position that front/back waist sheet 18,19 and elastic crotch sheet 13 intersect。Diaper 10 according to present embodiment, owing to the elongation stress making front/back waist Elastic region 39,42 is bigger than the elongation stress in leg elastic region 62, inhibit stretching of outer Hookean region 37, the 40 longitudinally Y of front/back waist, on the other hand, can transversely stretch by X, it is possible to make the waistline of diaper 10 and wearer fit。

An example as present embodiment, employ the diaper 10 front waist sheet 18 disconnected on longitudinal Y and back lumbar part sheet 19 absorbent structure 11 linked, can also applying the present invention to be made up of main body, configure at the skin opposite face of main body the diaper of absorbent structure 11, described main body is formed by front waist region 14,15 and crotch region 16 continuous print sheet member。But, the diaper that the front waist sheet separated in the vertical and back lumbar part sheet absorbent structure link generally only is possessed the elastomer extended longitudinally and the elastomer extended transversely。Accordingly, there exist front/back waist sheet 18,19 due to the contractility of elastomer that extends longitudinally and the hidden danger offset downwards relative to the waist of wearer。Due to the fact that being prevented from front/back waist sheet 18,19 as mentioned above offsets downwards relative to the waist of wearer, thus very effective particularly with above-mentioned diaper。

An example as present embodiment, employ front and back anti-leakage sheet 28,29 there is opaque liquid and be printed with by can the diaper 10 of pattern that constitutes of the various visible elements of visual confirmation from outside at the non-skin opposite face of front and back anti-leakage sheet 28,29 but it also may additionally arrange the thin film of liquid permeability and be printed with the sheet material of this pattern。

Additionally, in the above-described embodiment, as an example, describe that front waist sheet 18 comprises front anti-leakage sheet 28, back lumbar part sheet 19 comprises rear anti-leakage sheet 29 and is used as the diaper 10 of front and back anti-leakage sheet 28,29, but front and back anti-leakage sheet 28,29 can also be arranged at front waist sheet 18 and back lumbar part sheet 19 respectively, but be made up of 1 the anti-leakage sheet extended from front waist region 14 to rear waist region 15 on longitudinal Y。

In addition, exemplified with the example between Hookean region 38 and front waist Elastic region 39 in front waist on longitudinal Y of the front waist region 14 of above-mentioned embodiment with the non-configuring area of the elastomer not configuring elastomer but it also may be not provided with the non-configuring area of elastomer。

Additionally, exemplified with the example between Hookean region 41 and back lumbar part Elastic region 42 in back lumbar part on longitudinal Y of the rear waist region 15 of above-mentioned embodiment with the non-configuring area of the elastomer not configuring elastomer but it also may be not provided with the non-configuring area of elastomer。

It addition, in the diaper 10 of above-mentioned embodiment, describe the situation that the elongation stress in the outer Hookean region 37,41 of front/back waist is bigger than the elongation stress in front/back waist Elastic region 39,42。But, the invention is not restricted to this situation, it is also possible to be that the elongation stress in front/back waist Elastic region 39,42 is equal with the elongation stress in the outer Hookean region 37,41 of front/back waist。

< the second embodiment >

With reference to Fig. 9, in the present embodiment, absorbent structure 11 is also formed by absorbent core 58, body side liner 59 (top flat), outer covering layer (tergite) 60 and anti-leakage sheet 61。On the other hand, front waist sheet 18 does not comprise front anti-leakage sheet 28 and enhancement Layer 30, and the anti-leakage sheet 61 forward opening end edge 22a side of absorbent structure 11 extends。It addition, waist internal layer 24 longitudinally Y extends near open front ora terminalis 22a。Additionally, be configured with front waist elastomer 31,33,35 between waist internal layer 24 and waist outer layer 26。Anti-leakage sheet 61 is arranged between waist internal layer 24 and outer covering layer 60。Additionally, absorbent core 58 is covered by not shown core covering piece。

With reference to Figure 10, back lumbar part sheet 19 does not comprise rear anti-leakage sheet 29 and enhancement Layer 30, and the anti-leakage sheet 61 of absorbent structure 11 extends to rear open end edge 22b side。It addition, waist internal layer 25 longitudinally Y extends near after-opening ora terminalis 22b。Additionally, be configured with rear waist elastic body 32,34,36 between waist internal layer 25 and waist outer layer 27。Anti-leakage sheet 61 is arranged between waist internal layer 25 and outer covering layer 60。

With reference to Fig. 9 and 10, the external end edge 61a of a side of the anti-leakage sheet 61 from front waist region 14 play open front ora terminalis 22a till longitudinal Y on size of space L7 play after-opening ora terminalis 22b than the external end edge 61b of the opposing party of the anti-leakage sheet 61 from rear waist region 15 till longitudinal Y on size of space L8 big。

Diaper 10 according to the second embodiment, has the effect identical with the diaper 10 of the first embodiment and effect。In addition, the anti-leakage sheet 61 of absorbent structure 11 is utilized, it is not necessary to respective front and back anti-leakage sheet 28,29 is set at front/back waist sheet 18,19, it is possible to make component costs cheap, make easy to manufacture。

< the 3rd embodiment >

With reference to Figure 11, in the present embodiment, being configured with the first pattern 71 in the both sides of elastic crotch sheet 13, the first pattern 71 is can be constituted in the way of visual confirmation from the non-skin opposite face of diaper 10。In fig. 11, the region being formed with the first pattern 71 is represented with accompanying drawing labelling 72。First pattern 71 comprises the first element 73 that transversely X extends。

Non-skin opposite face at the front anti-leakage sheet 28 of present embodiment is formed with the second pattern 74a, and the second pattern 74a is can be constituted in the way of visual confirmation from the non-skin opposite face of diaper 10。In fig. 11, the region being formed with the second pattern 74a is represented with accompanying drawing labelling 75。Second pattern 74a be formed on horizontal X before the such as whole width of anti-leakage sheet 28。Second pattern 74a comprises the second element 76 that longitudinally Y extends。On front waist sheet 18, form, in the open front ora terminalis 22a side in the region 75 being formed with the second pattern 74a, the non-display area 80 being formed without the second pattern 74a。

It addition, the non-skin opposite face at rear anti-leakage sheet 29 is formed with the second pattern 74b, the second pattern 74b is can be constituted in the way of visual confirmation from the non-skin opposite face of diaper 10。In fig. 11, the region being formed with the second pattern 74b is represented with accompanying drawing labelling 77。Second pattern 74b be formed on horizontal X after the such as whole width of anti-leakage sheet 29。Second pattern 74b comprises the second element 78 that longitudinally Y extends。On back lumbar part sheet 19, form, in the after-opening ora terminalis 22b side in the region 77 being formed with the second pattern 74b, the non-display area 81 being formed without the second pattern 74b。

With reference to Figure 12, in rear waist region 15, produce multiple longitudinally Y fold 79 extended due to the contraction of rear waist elastic body 32 and rear waist elastic body 34。If the direction that the direction that the fold 79 resulting from rear waist region 15 extends extends with the element 78 constituting the second pattern 74b is identical, the after-opening ora terminalis 22b in rear waist region 15 then can be made noticeable, can being configured to when assuming back lumbar part sheet 19 clot, wearer or the third party can easily pass through the second element 78 and know the situation of clot。This is also same in front waist region 14 side。

If it addition, the first pattern 71 and the second pattern 74b are formed as identical structure, it is possible to readily appreciate that where the part being prevented from excretory portion leakage is configured at。

< the 4th embodiment >

With reference to Figure 13, the front waist sheet 18 of present embodiment has the front waist elastomer 31,33,35 configured at a prescribed interval on longitudinal Y, by the length dimension trisection on longitudinal Y of playing from forward open end edge 22a till lower ora terminalis, there is the front outer end region 137 in open front ora terminalis 22a side, the front inner end region 138 in crotch region 16 side and the front zone line 139 between front outer end region 137 and front inner end region 138。

With reference to Figure 14, the back lumbar part sheet 19 of present embodiment has the rear waist elastic body 32,34,36 configured at a prescribed interval on longitudinal Y, by the length dimension trisection on longitudinal Y of playing from after-opening ora terminalis 22b till lower ora terminalis, there is the rear outer end region 140 in after-opening ora terminalis 22b side, the rear inner end region 141 in crotch region 16 side and the rear zone line 142 between rear outer end region 140 and rear inner end region 141。

Due to fiber number and the elongation multiplying power of waist elastics 31～36 set as above, so the dependency relation of the elongation stress in each region 140～142 of rear waist region 15 has: inner end region 141 after rear outer end region 140 >=zone line 142 >。Therefore, even if the elongation stress in leg elastic region 62 being set to relatively small also being able to prevent diaper 10 skew downwards。

Additionally, the dependency relation of the extending force in leg elastic region 62 and rear outer end region 140 preferably meets the relation of outer end region 140 after the < of leg elastic region 62, and the dependency relation of leg elastic region 62 and the extending force in rear zone line 142 preferably meets the relation of zone line 142 after the < of leg elastic region 62。

When the wearer of diaper 10 is infant, make distinctive action sometimes, as waist is lifted, toe is contained in mouth, or with accumbency state by two lower limb intersections etc.。When doing such action, rear inner end region 141 is stretched due to the contraction in leg elastic region 62, rear waist region 15 entirety forwards offset mobile, there is the problem that the dorsal part of infant exposes。In this case, when the extending force in leg elastic region 62 is bigger than each region 140～142 of rear waist region 15, rear waist region 15 easily forwards moves due to the contraction in leg elastic region 62。In the present embodiment, owing to the extending force making leg elastic region 62 is less than the extending force of rear outer end region 140 and rear zone line 142, even if so acting on, in rear inner end region 141, the power that forward side stretches due to the contraction in leg elastic region 62, rear inner end region 141 is without misplacing significantly, and rear waist region 15 entirety will not forwards move。Additionally, relatively large by making the most prominent part of the buttocks from wearer play the extending force of the relative rear zone line 142 of waist location and rear outer end region 140, even if thus being acted on, in rear inner end region 141, the power that forward side stretches by leg elastic region 62, rear zone line 142 in rear waist region 15 and the part at rear outer end region 140 place also with the body fit of wearer, and position in the way of being hung on the upper end of buttocks。

For constituting each component parts of the disposable urine napkin 10 of Briefs type, as long as no record clear and definite especially, it is also possible to use except the material that this specification is recorded, conventional in this area various known material unrestrictedly。It addition, " first ", " second " that use in specification and claims scope is intended merely to the identical key element of difference, position etc. and uses with the term of " the 3rd "。

Above relate to disclosure of the invention and can at least arrange as following item。

< the first invention >

A kind of disposable absorbent article of Briefs type, there is longitudinal and orthogonal with this longitudinal direction transverse direction, there is skin opposite face and the non-skin opposite face in the opposition side of this skin opposite face, comprise front waist region, rear waist region, it is positioned at the crotch region between described front waist region, and it is located at least in the absorbent core of described crotch region, by making the edge, both sides of described front waist region be bonded with each other, thus delimiting waist opening and a pair leg opening, in the disposable absorbent article of described Briefs type, described front waist region comprises the open front ora terminalis of the part delimiting described waist opening, the front waist that can stretch and be positioned at described open front ora terminalis side along waistline direction keeps region, and it is positioned at the anti-leakage sheet of the described non-skin opposite face side of described absorbent core, described rear waist region comprises the after-opening ora terminalis of the part delimiting described waist opening, the back lumbar part that can stretch and be positioned at described after-opening ora terminalis side along waistline direction keeps region, and it is positioned at the described anti-leakage sheet of the described non-skin opposite face side of described absorbent core, the size of space described longitudinal direction till playing described open front ora terminalis from the external end edge of the described anti-leakage sheet of described front waist region play described after-opening ora terminalis than the external end edge from the described anti-leakage sheet of described rear waist region till described longitudinal direction on the size of space big, the size of space described longitudinal direction till playing described open front ora terminalis from the described front-end edge of described absorbent core is less than the size of space in the described longitudinal direction till playing described after-opening ora terminalis from the described end edge of described absorbent core。

< the second invention >

A kind of disposable absorbent article of Briefs type, there is longitudinal and orthogonal with this longitudinal direction transverse direction, there is skin opposite face and the non-skin opposite face in the opposition side of this skin opposite face, comprise front waist region, rear waist region, it is positioned at the crotch region between described front waist region, and it is located at least in the absorbent core of described crotch region, by making the edge, both sides of described front waist region be bonded with each other, thus delimiting waist opening and a pair leg opening, in the disposable absorbent article of described Briefs type, described rear waist region comprises the opening ora terminalis of the part forming described waist opening, the waist stretching region can stretched along waistline direction, form the sheet material of described waist stretching region, and it is positioned at the anti-leakage sheet of the described non-skin opposite face side of described absorbent core, described anti-leakage sheet extends to described opening ora terminalis side than the end edge of described absorbent core, described waist stretching region is at least formed between described end edge and the described opening ora terminalis of described absorbent core, the longitudinal size of the part extended to described opening ora terminalis side from the described end edge of described absorbent core is bigger than the size in the described longitudinal direction of the described absorbent core described rear waist region。

The disposable absorbent article of the Briefs type of the present invention disclosed in above-mentioned paragraph includes at least embodiment disclosed below, and embodiment can be separated from each other or select in combination to adopt。

(1) possesses absorbent structure, described absorbent structure comprises described absorbent core, and has the top flat of the described skin opposite face being positioned at described absorbent core, be positioned at the tergite of the described non-skin opposite face of described absorbent core and be configured at the described anti-leakage sheet of described non-skin opposite face of described tergite。

(2) possesses absorbent structure, described absorbent structure comprises described absorbent core, and there is the top flat of the described skin opposite face being positioned at described absorbent core, be positioned at the tergite of the described non-skin opposite face of described absorbent core and be positioned at the opaque liquid sheet of described non-skin opposite face of described tergite, described anti-leakage sheet is configured at the described non-skin opposite face of described absorbent structure。

(3) described absorbent core along described in extend with being longitudinally continuous, in the vertical, the position of the end edge of described absorbent core is configured at the position on the lower, position of the front-end edge than described absorbent core。

(4) described front waist keeps region and described back lumbar part to keep region to set with the length dimension to the described front-end edge of described absorbent core of the described forward open end genesis from described front waist region for benchmark, and described back lumbar part keeps region to have forming the part that described front waist keeps the number of sheet material in region fewer than the number of the sheet material forming described back lumbar part maintenance region。

(5) form described back lumbar part to keep the mass ratio of per unit area of sheet material in region to form described front waist keeping the quality of per unit area of sheet material in region little。

(6) described front waist region and described rear waist region have front waist middle section and back lumbar part middle section, the length dimension that described front waist middle section and back lumbar part middle section specify along described longitudinal extension from the lower end genesis in described front waist maintenance region to described crotch region, and keeping area adjacency with described front/back waist, the elongation stress along described waistline direction in the described back lumbar part maintenance region of the per unit length in described longitudinal direction is bigger along the elongation stress in described waistline direction than the described back lumbar part middle section of the per unit length in described longitudinal direction。

(7) described back lumbar part keeps region to comprise the described non-skin opposite face side being configured at described absorbent structure the rear waist elastic body along described horizontal expansion, and described rear waist elastic body extends continuously along described waistline direction。

(8) show the pattern that can confirm from external view at the non-skin opposite face of described anti-leakage sheet, described pattern has the element along described longitudinal extension。

(9) when by described longitudinal length dimension trisection to the lower ora terminalis of described crotch region side from described rear open end genesis, described rear waist region has the rear outer end region being positioned at described after-opening ora terminalis side, it is positioned at the rear inner end region of described crotch region side, and the rear zone line between described rear outer end region and described rear inner end region, described rear outer end region, the dependency relation of the elongation stress in described rear inner end region and described rear zone line is rear inner end region described in described rear zone line >=described rear outer end region >。

(10) there is the leg elastic region of the part configuration along described leg opening, the dependency relation of the extending force in described leg elastic region and described rear outer end region is rear outer end region described in described leg elastic region <, and the dependency relation of described leg elastic region and the extending force in described rear zone line is zone line described in described leg elastic region <。

The explanation of accompanying drawing labelling

The disposable absorbent article (disposable pull-on diaper) of 10 Briefs types

11 absorbent structure

14 front waist region

15 rear waist region

16 crotch regions

18 front waist sheets

19 back lumbar part sheets

22 waist openings

22a open front ora terminalis

22b after-opening ora terminalis

23 leg openings

Anti-leakage sheet (front anti-leakage sheet) before 28

Anti-leakage sheet (rear anti-leakage sheet) after 29

32 first rear waist elastic bodies

34 second rear waist elastic bodies (rear waist elastic body)

49a front waist stretching region

49b front waist keeps region

49c front waist middle section

50a back lumbar part stretching region

50b back lumbar part keeps region

50c front waist middle section

58 absorbent cores

58a front-end edge

58b end edge

59 body side liners (top flat)

60 outer covering layers (tergite)

61 anti-leakage sheets

62 leg elastic regions

74a the second pattern

76 second elements (element)

Outer end region before 137

Inner end region before 138

Zone line before 139

Outer end region after 140

Inner end region after 141

Zone line after 142

L1 plays the size of space the longitudinal direction till open front ora terminalis from the external end edge of the front anti-leakage sheet of front waist region

L2 plays the size of space the longitudinal direction till after-opening ora terminalis from the external end edge of the rear anti-leakage sheet of rear waist region

L3 play open front ora terminalis side from the front-end edge of absorbent core till longitudinal direction the size of space

L5 play after-opening ora terminalis from the end edge of absorbent core till longitudinal direction the size of space

Longitudinal size of the absorbent core in L6 rear waist region

L9 waist keeps longitudinal size (length dimension to the leading section of absorbent core of the open front genesis from front waist region) in region

Longitudinal size (length dimension that the lower end genesis from front waist maintenance region extends longitudinally to crotch region) of L10 waist middle section

X is laterally

Y is longitudinally。

Claims (12)

1. the disposable absorbent article of a Briefs type, there is longitudinal and orthogonal with this longitudinal direction transverse direction, there is skin opposite face and the non-skin opposite face in the opposition side of this skin opposite face, comprise front waist region, rear waist region, the crotch region being positioned between described front waist region and be located at least in the absorbent core of described crotch region, by making the edge, both sides of described front waist region be bonded with each other, thus delimiting waist opening and a pair leg opening, the disposable absorbent article of described Briefs type is characterised by

Open front ora terminalis that described front waist region comprises the part delimiting described waist opening, can stretch and be positioned at the front waist of described open front ora terminalis side along waistline direction and keep region and be positioned at the anti-leakage sheet of described non-skin opposite face side of described absorbent core

After-opening ora terminalis that described rear waist region comprises the part delimiting described waist opening, can stretch and be positioned at the back lumbar part of described after-opening ora terminalis side along waistline direction and keep region and be positioned at the described anti-leakage sheet of described non-skin opposite face side of described absorbent core

It is big that the size of space described longitudinal direction till playing described open front ora terminalis from the external end edge of the described anti-leakage sheet of described front waist region plays the size of space in the described longitudinal direction till described after-opening ora terminalis than the external end edge from the described anti-leakage sheet of described rear waist region, and the size of space described longitudinal direction till playing described open front ora terminalis from the described front-end edge of described absorbent core is less than the size of space in the described longitudinal direction till playing described after-opening ora terminalis from the described end edge of described absorbent core。

2. the disposable absorbent article of a Briefs type, there is longitudinal and orthogonal with this longitudinal direction transverse direction, there is skin opposite face and the non-skin opposite face in the opposition side of this skin opposite face, comprise front waist region, rear waist region, the crotch region being positioned between described front waist region and be located at least in the absorbent core of described crotch region, by making the edge, both sides of described front waist region be bonded with each other, thus delimiting waist opening and a pair leg opening, the disposable absorbent article of described Briefs type is characterised by

The opening ora terminalis that described rear waist region comprises the part forming described waist opening, the waist stretching region can stretched along waistline direction, the sheet material forming described waist stretching region and be positioned at the anti-leakage sheet of described non-skin opposite face side of described absorbent core

Described anti-leakage sheet extends to described opening ora terminalis side than the end edge of described absorbent core,

Described waist stretching region at least formed between described end edge and the described opening ora terminalis of described absorbent core,

The longitudinal size of the part extended to described opening ora terminalis side from the described end edge of described absorbent core is bigger than the size in the described longitudinal direction of the described absorbent core described rear waist region。

3. absorbent commodity according to claim 1 and 2, it is characterised in that

Possesses absorbent structure, described absorbent structure comprises described absorbent core, and has the top flat of the described skin opposite face being positioned at described absorbent core, be positioned at the tergite of the described non-skin opposite face of described absorbent core and be configured at the described anti-leakage sheet of described non-skin opposite face of described tergite。

4. absorbent commodity according to claim 1 and 2, it is characterised in that

Possesses absorbent structure, described absorbent structure comprises described absorbent core, and there is the top flat of the described skin opposite face being positioned at described absorbent core, be positioned at the tergite of the described non-skin opposite face of described absorbent core and be positioned at the opaque liquid sheet of described non-skin opposite face of described tergite

Described anti-leakage sheet is configured at the described non-skin opposite face of described absorbent structure。

5. absorbent commodity according to any one of claim 1 to 4, it is characterised in that

Described absorbent core along described in extend with being longitudinally continuous, in the vertical, the position of the end edge of described absorbent core is configured at the position on the lower, position of the front-end edge than described absorbent core。

6. the absorbent commodity according to any one of claim 1,3,4,5, it is characterised in that

Described front waist keeps region and described back lumbar part to keep region to set with the length dimension to the described front-end edge of described absorbent core of the described forward open end genesis from described front waist region for benchmark,

Described back lumbar part keeps region to have forming the part that described front waist keeps the number of sheet material in region fewer than the number of sheet material forming described back lumbar part maintenance region。

7. the absorbent commodity according to any one of claim 1,3,4,5, it is characterised in that

Form described back lumbar part to keep the mass ratio of per unit area of sheet material in region to form described front waist keeping the quality of per unit area of sheet material in region little。

8. the absorbent commodity according to claim 6 or 7, it is characterised in that

Described front waist region and described rear waist region have front waist middle section and back lumbar part middle section, the length dimension that described front waist middle section and back lumbar part middle section specify along described longitudinal extension from the lower end genesis in described front waist maintenance region to described crotch region, and keep area adjacency with described front/back waist

The elongation stress along described waistline direction in the described back lumbar part maintenance region of the per unit length in described longitudinal direction is bigger along the elongation stress in described waistline direction than the described back lumbar part middle section of the per unit length in described longitudinal direction。

9. the absorbent commodity according to any one of claim 6 to 8, it is characterised in that

Described back lumbar part keeps region to comprise the described non-skin opposite face side being configured at described absorbent structure the rear waist elastic body along described horizontal expansion,

Described rear waist elastic body extends continuously along described waistline direction。

10. the absorbent commodity according to any one of claim 5 to 9, it is characterised in that

Non-skin opposite face at described anti-leakage sheet shows the pattern that can confirm from external view,

Described pattern has the element along described longitudinal extension。

11. absorbent commodity according to any one of claim 1 to 10, it is characterised in that

When by described longitudinal length dimension trisection to the lower ora terminalis of described crotch region side from described rear open end genesis, described rear waist region has the rear outer end region being positioned at described after-opening ora terminalis side, it is positioned at the rear inner end region of described crotch region side, and the rear zone line between described rear outer end region and described rear inner end region, described rear outer end region, the dependency relation of the elongation stress in described rear inner end region and described rear zone line is rear inner end region described in described rear outer end region >=described rear zone line >。

12. absorbent commodity according to claim 11, it is characterised in that

There is the leg elastic region of the part configuration along described leg opening,

The dependency relation of the extending force in described leg elastic region and described rear outer end region is rear outer end region described in described leg elastic region <,

The dependency relation of the extending force in described leg elastic region and described rear zone line is zone line described in described leg elastic region <。