CN104066408A

CN104066408A - Disposable diaper

Info

Publication number: CN104066408A
Application number: CN201380005920.6A
Authority: CN
Inventors: 坂口智
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2012-11-27
Filing date: 2013-11-27
Publication date: 2014-09-24
Anticipated expiration: 2033-11-27
Also published as: CN104066408B; KR20140096156A; SA515360491B1; WO2014084234A1; KR101453251B1; JP5588498B2; JP2014104149A

Abstract

An elastic crotch section (200a) in a disposable diaper (10) is disposed in such a manner as to straddle a center line (O) of the disposable diaper (10) in a product width direction (W), and overlap with a region in which at least an absorbent body (40) is disposed. The elastic crotch section (200a) is provided away from a waist holding section (150) without intersecting the waist holding section (150). A liquid-permeable top sheet (50) is provided closer to a skin contact surface side (S1) of the disposable diaper (10) than the absorbent body (40). A liquid-permeable second sheet (51), which is bulkier than the top sheet, is provided between the top sheet (50) and the absorbent body (40). The second sheet (51) is disposed in such a manner as to overlap with a region in which the elastic crotch section (200a) is disposed.

Description

Disposable diaper

Technical field

The present invention relates to disposable diaper.

Background technology

In the past, known have a following disposable diaper,, there is the territory, crotch zone between predecessor region, rear body region, Yu Houshen region, He predecessor region, and be formed with pair of leg week peristome, and possess and stride across the absorber that at least one party of territory, crotch zone towards He Houshen region, predecessor region extends.

In this disposable diaper, in order to improve suction, keep the ability of discharged liquid, known have a following technology,, between absorber and top-sheet, the second sheet material of the liquid permeability more fluffy than top-sheet is set that is.

Look-ahead technique document

Patent documentation

Patent documentation 1: Japanese kokai publication sho 61-141361 communique

Patent documentation 2: Japanese kokai publication hei 5-261126 communique

Summary of the invention

In Fig. 4 (a), represent to be provided with the state that the disposable diaper 10 of the second such sheet material 51 is worn by wearer, in Fig. 4 (b), schematically represent the result of the CT scan under state that this disposable diaper 10 worn by wearer.

As shown in Fig. 4 (b), this disposable diaper 10, under the state of being worn by wearer, hangs down in wearer's crotch bottom.

Therefore, in this disposable diaper 10, although be provided with the second sheet material 51, but this second sheet material 51 bendings and further hanging down, thus, in this second sheet material 51, suitably suck on one side, the discharged liquid A that maintenance is drained from wearer's scavenge port makes its diffusion become insufficient on one side, particularly in the situation that discharged liquid A is a large amount of, or after repeatedly draining, the situation of further draining is inferior, there is following problem points, , a large amount of discharged liquid A is present in the space between wearer and disposable diaper 10, according to wearer's action, easily become outside disposable diaper 10 and leak such state.

Therefore, the present invention proposes in view of such situation, its object is, provide a kind of and can more desirably manifest absorption maintenance function and the diffusion function of being located at the second sheet material between absorber and top-sheet, its result, reduce the amount of the discharged liquid be present in the space between wearer and disposable diaper, can suppress the disposable diaper that discharged liquid that the action because of wearer causes is leaked to outside.

The 1st technical scheme of the present invention is, a kind of disposable diaper, this disposable diaper has predecessor region, rear body region, and the territory, crotch zone between above-mentioned predecessor region and above-mentioned rear body region, this disposable diaper is formed with pair of leg week peristome, and possesses absorber, this absorber strides across territory, above-mentioned crotch zone, at least one party towards above-mentioned predecessor region and above-mentioned rear body region extends, this disposable diaper has from above-mentioned predecessor region the goods length direction in body region towards above-mentioned, with the goods width with said products length direction quadrature, it is characterized in that, this disposable diaper possesses: body portion maintaining part, in above-mentioned predecessor region and above-mentioned rear body region, along said products width, extend, above-mentioned disposable diaper is remained on wearer's health, and crotch's pars contractilis, be formed on territory, above-mentioned crotch zone, at least along said products length direction, can stretch, above-mentioned crotch pars contractilis is configured to, stride across the centrage of the said products width of above-mentioned disposable diaper, at least with the region overlapping that configures above-mentioned absorber, above-mentioned crotch pars contractilis not with above-mentioned body portion maintaining part across from liftoff the setting of above-mentioned body portion's retaining part, in the skin bearing surface side by above-mentioned disposable diaper than above-mentioned absorber, the top-sheet that possesses liquid permeability, between above-mentioned top-sheet and above-mentioned absorber, the second sheet material that possesses the liquid permeability more fluffy than above-mentioned top-sheet, above-mentioned the second sheet material is configured to, with the region overlapping that disposes above-mentioned crotch pars contractilis.

Accompanying drawing explanation

Fig. 1 is the expansion plane graph of the disposable diaper of embodiments of the present invention.

Fig. 2 is the cutaway view along the disposable diaper of the present embodiment of the F1-F1 line shown in Fig. 1.

Fig. 3 means the figure of the state that the disposable diaper of embodiments of the present invention is worn by wearer.

Fig. 4 means the figure of the state that disposable diaper is in the past worn by wearer.

The specific embodiment

With reference to Fig. 1～Fig. 3, the disposable diaper 10 of the 1st embodiment of the present invention is described.

In addition, in the record of following accompanying drawing, to same or similar part, mark same or similar Reference numeral.But should be careful, accompanying drawing is schematic figure, and the ratio of each size etc. are different from reality.

Thereby concrete size etc. should judge with reference to the following description.In addition,, even mutual at accompanying drawing, also may comprise the different part of relation, ratio of size each other.

In addition, in the present embodiment, the disposable diaper 10 of banding pattern of take describes as example, but the present invention is also applicable to the disposable diaper 10 of pants type.

Fig. 1 is the expansion plane graph of the disposable diaper 10 of present embodiment.In addition, expansion plane graph shown in Fig. 1, the figure of state of the fold of the top-sheet 50 that shank pars contractilis 75 and leg side rivel 80 is elongated to do not form to form disposable diaper 10, flank sheet 70 etc., but for convenience of explanation, so that the state that leg side rivel 80 has stretched illustrates.

Fig. 2 is the cutaway view along the disposable diaper 10 of the present embodiment of the F1-F1 line shown in Fig. 1, Fig. 3 (a) means the figure of the state that the disposable diaper 10 of present embodiment is worn by wearer, and Fig. 3 (b) is the figure that schematically represents the result of the CT scan under state that the disposable diaper 10 of present embodiment worn by wearer.

As shown in Figure 1, the disposable diaper 10 of present embodiment has predecessor region 20, territory, crotch zone 25 and rear body region 30.In addition, on disposable diaper 10, be formed with pair of leg week peristome 35.

Here, predecessor region 20 is the parts that contact with wearer's portion of predecessor, and rear body region 30 is the parts that contact with wearer's rear body section, the part between Yu25Shi predecessor region, crotch zone 20 and rear body region 30.

In addition, in the present embodiment, the direction of Jiang Cong predecessor region 20 towards rear body region 30 is called goods length direction L, and the direction with the L-orthogonal of goods length direction is called to goods width W.

, be formed with crotch 200 in territory, crotch zone 25 here, Jiang Bi crotch 200, by the region of wearer's veutro, is defined as predecessor region 20, and Jiang Bi crotch 200, by the region of wearer's dorsal part, is defined as rear body region 30.

In addition, on disposable diaper 10, form pair of leg week peristome 35.The all peristomes 35 of lower limb are located at the side end of the goods width W of disposable diaper 10, are under the state of being worn by wearer at disposable diaper 10, along wearer's the part being configured in lower limb week.

The disposable diaper 10 of present embodiment possesses absorber 40, and this absorber 40 strides across territory, crotch zone 25, and from territory, crotch zone 25 towards predecessor region 20 and at least one party in body region 30 extend.

As shown in Figure 2, absorber 40 consists of absorbent core 40a and core thin film 40b.

The absorbent core 40a absorbent core used with disposable diaper is in the past identical, can use the known members such as comminution pulp, high absorption polymer, material to carry out suitable formation absorbent core 40a.Absorbent core 40a is encased by the core thin film 40b of lamellar.

Core thin film 40b is the sheet material that covers absorbent core 40a.A part of at least skin bearing surface side S1 of core thin film 40b, consists of various fabric nonwoven cloths or the thin crepe paper sheet with liquid permeability.

For example, as the member that forms core thin film 40b, can service property (quality) about 10～30g/m ²the about 10～30g/m of hot blast fabric nonwoven cloth, spun-bonded non-woven fabrics, SMS (spin SMS-spunbond) non-woven fabrics, quality ²thin crepe paper sheet.

In addition, as shown in Figure 2, at face side (the skin bearing surface side) S1 of absorber 40, possess the top-sheet 50 of liquid permeability, rear side (the non-skin bearing surface side) S2 at absorber 40, possesses back sheet material 60.

In addition, as shown in Figure 2, between top-sheet 50 and back sheet material 60, possesses the leakproof sheet material 61 of opaque liquid.

In addition,, between top-sheet 50 and absorber 40, possesses the second sheet material 51 of liquid permeability.Preferably the second sheet material 51 is more fluffy than top-sheet 50.

Here, about the loft (Japanese: high) of the non-woven fabrics of the second sheet material 51 and top-sheet 50 etc., can as below, measure.

For example, use the tail rugged making ピ processed ーコッ Network ダイヤ Le シッ Network ネスゲージ of society of institute of Co., Ltd. (pachometer), the diameter of circular measuring piece of take is 40mm, and load is 3.0g/cm ²mode adjust, also can measure the loft of the non-woven fabrics of measuring object.

In addition, in the situation that the size of the non-woven fabrics of measuring object is less than 40mm, also can change the size of circular measuring piece, take load as 3.0g/cm ²mode adjust, the loft of the non-woven fabrics of measuring object is measured.

Here, the second sheet material 51 preferably contains cross-linked cellulose fibres.Cross-linked cellulose fibres (comparing with common cellulose fibre) are difficult to produce interfibrous hydrogen bonded.During excremental absorption, there is hydrogen bonded loss and the tendency of the loft loss of sheet material in common cellulose fibre.With respect to this, by with cross-linked cellulose fibres, because interfibrous hydrogen bonded is just few originally, so can reduce the variation of the loft based on excremental absorption, its result, can prevent that loft from losing such state of affairs.

Edge, both sides on the goods width W of absorber 40, possesses respectively flank sheet 70.Flank sheet 70 consists of multiple more than 1 or 2 overlapping non-woven fabrics.

In addition, as shown in Figure 1, the disposable diaper 10 of present embodiment, possesses a pair of cingulum 90 in rear body region 30, in the regulation region of the non-skin bearing surface side in predecessor region 20, possesses target portion 95.

, by cingulum 90, be installed in target portion 95 here, disposable diaper 10 can be remained on wearer's health.Thereby, in the present embodiment, by predecessor region 20, rear body region 30, cingulum 90 and target portion 95, form body portion maintaining part 150.

Here, body portion maintaining part on rear body region 30, be the scope of extending along goods width W from being provided with the region of the fastened component of cingulum 90, the body portion maintaining part on predecessor region 20, is the scope of extending along goods width W from being provided with the region of target portion 95.

In addition, as shown in Figure 1, the disposable diaper 10 of present embodiment also can possess the pars contractilis 200a of crotch in territory, crotch zone 25.

Particularly, the pars contractilis 200a of crotch, in crotch 200, more specifically, in territory, crotch zone 25, strides across the center of goods width, and is formed in the absorber configuring area that disposes absorber 40.In addition, the structure of the relevant pars contractilis 200a of crotch, after explain.

In addition, as shown in Figure 1, in the face side (top-sheet 50 sides) of absorber 40, possesses a pair of shank pars contractilis (shank rivel) 75 that forms and at least can stretch along goods length direction L along all peristomes 35 of lower limb.

Shank pars contractilis 75 is long at the goods length direction L Shang Bi pars contractilis 200a of crotch, and is located at than the pars contractilis 200a of crotch in the outer part on goods width W.

Shank pars contractilis 75 both can be configured to all peristomes 35 of lower limb can be stretched along goods length direction L, can, along peristome 35 configurations of lower limb week, can also be also that a part for shank pars contractilis 75 configures under the state with respect to peristome 35 inclinations of lower limb week.

In addition, shank pars contractilis 75 is parts of utilizing Stretchable sheet etc. to shrink along goods length direction L in fact, is the concept disposing under the state not bringing into play contractility the part of Stretchable sheet.In addition, the structure of relevant shank pars contractilis 75, after explain.

[leg side rivel 80]

In addition, as shown in Figure 1, also can, in the inner side of a pair of shank pars contractilis 75 (the close central authorities of goods width W), possess a pair of leg side rivel 80 extending along goods length direction L.

Leg side rivel 80 is located at the medial end of the goods width W of flank sheet 70, is to be configured in the flexible rivel by the erecting property of the inner side of goods width W than shank pars contractilis 75.

Leg side rivel 80 can adopt in the past known structure, particularly, can consist of the sheet material different from flank sheet 70.

The medial end of flank sheet 70 on goods width W, turns back to top-sheet 50 sides, is laminated into 2 layers.

Between the flank sheet 70 of stacked state, under the state extending along goods length direction L, be provided with elastic component 71.By flank sheet 70 and elastic component 71, form leg side rivel 80.

Leg side rivel 80 has: the bonding part 81 that is engaged in top-sheet 50 or back sheet material 60; And the free end portion 82 that disposes elastic component 71.

The middle body of goods length direction L in free end portion 82, that comprise territory, crotch zone 25, utilizes elastic component 71 to shrink along goods length direction L, forms contraction flow region 84.

Leg side rivel 80, when wearing disposable diaper 10, usings bonding part 81 to erect as base end part, the contraction flow region 84 of free end portion 82 as apex and with wearer's contact skin.That is, bonding part becomes the base end part erecting of leg side pars contractilis.

In addition, contraction flow region 84 is parts of utilizing elastic component 71 to shrink along goods length direction L in fact, is the concept disposing under the state not bringing into play contractility the part of elastic component 71.

In addition, in Fig. 1, in leg side rivel 80, offside fin 70 and top-sheet 50 (or back sheet material 60 etc.) engaged bonding part 81 mark oblique lines and representing.

Bonding part 81 is provided with a plurality of, and the 1st bonding part 81A is configured in the outside by goods length direction L than contraction flow region 84, and the 2nd bonding part 81B is configured in the outside by goods width W than contraction flow region 84.

Thus, leg side rivel 80 is constituted as, and comprises that the middle body of goods length direction L in territory, crotch zone 25 is to edge-on of wearer.

In the bonding part 81 of leg side rivel 80, be configured in the 1st bonding part 81A by the outside of goods length direction L than contraction flow region 84, be engaged in top-sheet 50.

In the bonding part 81 of leg side rivel 80, be configured in the 2nd bonding part 81B by the outside of goods width W than contraction flow region 84, on goods width W, be configured between the pars contractilis 200a of crotch and shank pars contractilis 75.

The 2nd bonding part 81B is engaged in back sheet material 60 or leakproof sheet material 61 in the total length of goods length direction L.

In addition, the bonding part 81 of leg side rivel 80 can adopt various structures.This bonding part 81 can be both for example on goods length direction L from territory, crotch zone 25 extend to predecessor region 20 and body region 30, and be engaged in the part of top-sheet 50, also can be in the outside by goods width W than absorbent core 40a, the part that is engaged in back sheet material 60, leakproof sheet material 61, is constituted as the base end part erecting.

In addition, leg side rivel 80 can be to be also configured in the rivel by the erecting property of the inner side of goods width W than shank pars contractilis 75, is certainly not limited to above-mentioned structure, can adopt in the past the structure of known leg side rivel 80.

[waist pars contractilis (waist rivel) 100]

In addition, disposable diaper 10 also can possess and is formed at rear body region 30, waist pars contractilis 100 that can be flexible along goods width W.

Particularly, waist pars contractilis 100 is located between a pair of cingulum 90 on goods width W, between cingulum 90, along goods width W, shrinks.

In the present embodiment, waist pars contractilis 100 consists of Stretchable sheet.About forming the member of waist pars contractilis 100, though be not specially limited, preferred use is thin as far as possible and flexural rigidity is low, the member that contracting amplitude-frequency is little.

Here, by forming waist pars contractilis 100 by the low material of flexural rigidity, it is easily crooked along wearer's health that waist pars contractilis 100 becomes, and can to wearer's health, not apply load and make waist pars contractilis 100 along wearer's health coupling.

In addition, by forming waist pars contractilis 100 by the little material of contracting amplitude-frequency, can be suppressed at disposable diaper 10 along the contraction of the goods length direction W of the disposable diaper 10 in the situation of goods width W elongation, and can be suppressed at wearer's waistline (waist), disposable diaper 10 declines to wearer's crotch downside.

In the present embodiment, as waist pars contractilis 100, applying unit area weight is 20～45g/m ²retractility film.

Waist pars contractilis 100, after 1.25～2.5 times that are elongated as the length of non-elongation state (naturalness), is adhered to back sheet material 60 (or leakproof sheet material 61) by hot-melt adhesive or heat treated etc.

In the present embodiment, waist pars contractilis 100 also can be configured between leakproof sheet material 61 and back sheet material 60.But when becoming core thin film 40b and extend to than absorbent core 40a by the structure in the outside of goods length direction L, waist pars contractilis 100 also can be configured between core thin film 40b and back sheet material 60 (or leakproof sheet material 61).

The position of waist pars contractilis 100 is not specially limited.In addition, be positioned at while being unworthy of putting the region of absorber 40, waist pars contractilis 100 also can be configured between flank sheet 70 and back sheet material 60 (or leakproof sheet material 61).

In addition, the waist pars contractilis 100 of present embodiment is constituted as along goods width W flexible, but also can be constituted as along goods width W and goods length direction L both sides flexible.

[the low rigid region 210 of absorber 40]

Here, absorber 40 is in rear body region 30, has weight per unit area lower or do not have a low rigid region 210 of absorbent core 40a than other position of absorber 40.

In addition, low rigid region 210 is formed, and extends near the rear body region 30Ce end E9 on the goods length direction L of absorber 40.

The width of the low rigid region 210 on goods width W, along with the rear body region 30Ce end E9 on the goods length direction L towards absorber 40 goes and broadens.

More specifically, the shape of low rigid region 210 is chock shape in the plane graph of disposable diaper 10.

In addition, absorber 40 has the flexible i.e. flexible inhibition zone 220, repressed region of comparing with other region on goods width W.

Here, flexible inhibition zone 220 as shown in Figure 1, is respectively formed at the outside of the goods width W of low rigid region 210.

In addition, the boundary of flexible inhibition zone 220 and low rigid region 210, forms by protruding such circular arc towards the center of goods width W.In addition, the absorber 40 than low rigid region 210 by the outside of goods width W, is the trapezoidal shape protruding towards rear body region 30Ce end E9.

According to this structure, can make to wear the impression of the shape of the buttocks that auxiliary entertains wearer.

Particularly in the situation that disposable diaper 10 is disposable diapers 10 of banding pattern, while laying disposable diaper 10 under wearer's health, by making absorbent core 40a, be that above-mentioned shape or the waist pars contractilis that makes rear body region 30 100 are above-mentioned shape, can make to wear the position that auxiliary remembers the buttocks that should place wearer, therefore, can make disposable diaper 10 be worn in position more accurately.

In addition, waist pars contractilis 100 and absorber 40 are constituted as, overlapping at least a portion in the plane graph of disposable diaper 10.

Particularly, waist pars contractilis 100 is constituted as, in the plane graph of disposable diaper 10, overlapping with at least a portion of low rigid region 210.

In addition, in the present embodiment, waist pars contractilis 100 is configured overlappingly with a part for low rigid region 210, but also can overlap and be configured with the institute of low rigid region 210.

By being formed with so low rigid region 210, even if do not hinder the waist pars contractilis 100 that telescopically makes of waist pars contractilis 100 to shrink, low rigid region 210 also can constriction, also can constriction by the absorber 40 in the outside of goods width W interval each other than low rigid region 210, therefore, absorber 40 becomes and is difficult to unexpected shape protuberance.

In addition, if consider to prevent the leakage of discharged liquid, low rigid region 210 preferably has the width narrower than the width of waist pars contractilis 100.

In addition, if absorber 40 is because waist pars contractilis 100 shrinks along goods width W, than low rigid region 210, by the absorber 40 in the outside of goods width W interval each other, narrow down, at low rigid region 210, the position of the close end E9 of rear body region 30 sides is compared with the position in territory, close crotch zone 25, significantly near the central authorities of goods width W, therefore, the position of close end E9 and the position in territory, close crotch zone 25 in rear body region 30 sides, produce the poor of amount of contraction on goods width W, rear body region 30 is erected.

; due on disposable diaper 10, be provided with can be flexible along goods width W waist pars contractilis 100 and the low rigid region 210 of chock shape; so when wearing disposable diaper 10, at non-skin bearing surface side S2, disposable diaper 10 easily forms the cup-shaped of heaving.

In addition, in the present embodiment, owing to not having absorbent core 40a at low rigid region 210, there is waist pars contractilis 100 with the overlapping mode of low rigid region 210, so at low rigid region 210, the position of the close end E9 of rear body region 30 sides is compared with the end position of absorbent core 40a, significantly near goods width W central authorities, erecting of rear body region 30 becomes more obvious, therefore can more stably form cup-shaped.

In the present embodiment, because surpassing lateral margin on the goods width W of absorbent core 40a, waist pars contractilis 100 exists, so when disposable diaper 10 is formed to cup-shaped, can make the absorbent core 40a of E9Ce position, close end of rear body region 30 sides on goods length direction L energetically along wearer's health.

In addition, at least a portion of waist pars contractilis 100 and low rigid region 210, is present in the region of extending from a pair of cingulum 90 along goods width W.

Therefore, even make under health under state that wearer go to bed disposable diaper 10 is laid in, when disposable diaper 10 is dressed in to wearer, the waist pars contractilis 100 existing over the lateral margin on the goods width W of absorbent core 40a also can not be laid under wearer's health.

Thereby by pulling a pair of cingulum 90, the lateral margin of waist pars contractilis 100 extends, easily make the position of close waist side of cup-shaped more reliably along wearer's health.

In the present embodiment, than low rigid region 210, depending on the absorbent core 40a in the outside of goods width W is convex form towards rear body region 30 sides.Therefore, as mentioned above, except disposable diaper 10 easily forms the cup-shaped of heaving at non-skin bearing surface side S2, the surface area of absorbent core 40a is maintained, and therefore, can prevent that discharged liquid is from the end leakage of absorbent core 40a.

In the present embodiment, low rigid region 210 is chock shape in the plane graph of disposable diaper 10, and the boundary of absorbent core 40a and low rigid region 210 is by towards territory, crotch zone, the such circular arc of 25 protrusion forms.In addition, the radius of this circular arc is 50mm～200mm.

Therefore, length (width) on the goods width W of (naturalness) low rigid region 210, along with the rear body region 30Ce end E9 on goods length direction L, go but not linear become large, erecting of rear body region 30 becomes more obvious, therefore, easily more stably form cup-shaped.

In addition, because the boundary of absorbent core 40a and low rigid region 210 is by 25 protruding such circular arc and form towards territory, crotch zone, after body region 30 by the contraction of low rigid region 210, become the cup-shaped with fillet, become the shape of the easy buttocks with fillet along wearer.

In addition,, by being formed with low rigid region 210, at the rear body region of absorber 40 30Ce end E9, left and right is formed with respectively the convex form towards rear body region 30 sides.Because the shape of this absorber 40 is reminded and wear auxiliary and loaded the buttocks in wearer, so have, easy disposable diaper 10 is matched with concerning wearer to the such effect in position more accurately.

[flexural rigidity of absorber 40]

The flexural rigidity of present embodiment, based on according to the values of stiffness of Taber method (JISP8125), is measured by following method.

First, make disposable diaper 10 for deployed condition, gather the sample (for example absorber 40) of the measuring object part of flexural rigidity.

About the measuring object part of flexural rigidity, sample is the size of 70mm (length of goods width W) * 38mm (length of goods length direction L).In sample, in the situation that comprising elastic component, remove in advance this elastic component.In addition, the exerciser of the measurement of values of stiffness uses (strain) peace field essence mechanism to make made Taber rigidity testing instrument.In addition, sample number is 10, measures each sample, usings its meansigma methods as values of stiffness.

The order of this measurement is as following (a)～(e).

(a) measure the thickness (A) of the sample gathering.

(b) the degree clamped sample then, contacting with the center of the dop with testing machine (downside).

(c) total in the gap, left and right of backing roll and sample is adjusted to (A) * 0.80 (mm).

(d) to indicate the mode of load scale in 15～85% scope of maximum scale, suitably select auxiliary counterweight.

(e) make sample two direction rotations to the left and right, it is stopped at the 15 degree supporting groove point consistent with the center groove of pendulum, read the scale of testing machine.The numerical value in left side of scale of take is (B), and the numerical value on right side of scale of take is (C).

Values of stiffness is obtained by following numerical expression.

Numerical expression: values of stiffness (mN ﹒ m)=(((B)+(C))/2) * (auxiliary counterweight coefficient) * 9.81 * 10 ^-2

In addition, in the situation that width that cannot acquisition test sheet is 38mm, to the bending moment of 38mm width, convert.

The values of stiffness of measuring is like this higher, and flexural rigidity is higher, and values of stiffness is lower, and flexural rigidity is lower.

[structure of cingulum and target portion]

Cingulum 90 is installed in the region of the flank sheet 70 corresponding with rear body region 30.

Particularly, as shown in Figure 1, cingulum 90 possesses: the substrate sheet 91 that is linked to flank sheet 70; And hook sheet 92, be provided with a plurality of clamping hooked as fastened component (not shown), be fixed in substrate sheet 91.

Hook sheet 92 is the regions that are provided with fastened component, and above-mentioned body portion maintaining part is the region of extending from hook sheet 92 along goods width W.

Hook sheet 92 is fixed (particularly, engaging) in substrate sheet 91.

The rigidity of the preferred cingulum 90 of joint of this hook sheet 92 and substrate sheet 91 is not high to more than necessity.Particularly, hook sheet 92 and substrate sheet 91 are preferably engaged by the such intermittently coated hot-melt adhesive of point-like, wire or helical form.In addition, hook sheet 92 and substrate sheet 91 also can wait joint by heat-sealing.

Substrate sheet 91 consists of multiple more than 1 or 2 overlapping non-woven fabrics.As substrate sheet 91, can use by the non-woven fabrics of the method for making manufacturings such as SB (spunbond) or SMS (spin SMS-spunbond).The weight per unit area (in the situation of multiple, summation unit area weight) that forms the non-woven fabrics of substrate sheet 91 is 30～120g/m ², 40～90g/m preferably ².

Target portion 95 is located at the non-skin bearing surface of the back sheet material 60 in predecessor region 20.Target portion 95 is constituted as the clamping hooked hook for cingulum, as the ring of the engaging system of hook and ring, plays a role.As target portion 95, for example, can use hot-wind nonwoven cloth.

Target portion 95 for example can be used by the fabric nonwoven cloth of the thermoplastic synthetic resin fiber making of polyolefin or the thermoplastic synthetic resin film of polyolefin.In addition the ring that, is installed in target portion 95 can be formed by the thermoplastic synthetic resin of polyolefin.

In addition, as target portion 95, also can be with fluffy and by its part is carried out to the non-woven fabrics that embossing prevents the fluffing of nonwoven surface.

In addition, even if formed the leakproof sheet material 61 of disposable diaper 10 by non-woven fabrics, the pattern that represents the installation site of cingulum 90 is printed onto on the non-skin bearing surface of back sheet material 60 or leakproof sheet material 61, maybe the sheet material of this pattern is configured in to the non-skin bearing surface side S2 of back sheet material 60 or leakproof sheet material 61, also can be as target portion 95.

[shank pars contractilis 75]

Shank pars contractilis 75 is along being located at lower limb week peristome 35 configurations by the outside of goods width W than absorber 40, and along goods length direction, L can telescopically form.

Shank pars contractilis 75 has position on goods width W and is positioned at the width inner end region 75I of inner side in territory, crotch zone 25.

The all peristomes 35 of lower limb and shank pars contractilis 75, particularly in rear body region 30, along with going from territory, crotch zone 25 towards the outside of goods length direction L, extend towards the outside of goods width W.

In addition, the width inner end region 75I of shank pars contractilis 75 both can configure continuously on goods length direction L, also can be discontinuous on goods length direction L.

In the present embodiment, lower limb week peristome 35 goods width W on position in territory, crotch zone, be positioned at the region of inner side, consistent with the width inner end region 75I of shank pars contractilis 75, but also can be consistent.

In the present embodiment, shank pars contractilis 75 consists of Stretchable sheet.For example, as this Stretchable sheet, can use the thermoplastic elastomer resin of melting as polyurethane or styrene and form membranaceous retractility film, the flexible nonwoven fabrics being formed by contractile fibre, the local composite sheet that is cut off or is formed by the fragile non-extension sheet material of having changed of laminating etc. on retractility film or flexible nonwoven fabrics.

In addition, also can replace this Stretchable sheet, by configuring the elastic component of the 1 or many wire-band shape being formed by polyurethane elastic fiber or natural rubber, form shank pars contractilis 75.

Or for example shank pars contractilis 75 also can for example, consist of the elastic component (3 elastic components) of regulation radical.

Shank pars contractilis 75 is configured between flank sheet 70 and back sheet material 60.Or, possessing the region that is configured in the leakproof sheet material 61 between absorber 40 and back sheet material 60, shank pars contractilis 75 is configured between leakproof sheet material 61 and flank sheet 70.

Particularly, the width of this Stretchable sheet member (width on the goods width W under the naturalness of disposable diaper 10) is at least in territory, crotch zone 25, preferably more than 5mm and below 45mm, more than being more preferably 12.5mm and below 35mm.

In addition, this measurement is used affine (シ Application ワ) to measure Co., Ltd.'s measurements of springs instrument processed (スプリ Application グメジャー) (band portion: the vinyl chloride coating of putting into glass fibre), carry out (10 samples) in the mode along measuring object position.

At this, when the width of this Stretchable sheet member is less than 5mm, all along wearer's lower limb with face in fact, the power of tying tight thus can not concentrated partly, cannot manifest and reduce by elasticity key element the such effect of the load of wearer's skin, if the width of this Stretchable sheet member surpasses 45mm, compare with the length of the goods width W of (naturalness) disposable diaper 10 integral body, along lower limb week, the region of peristome 35 can become excessive, and Stretchable sheet becomes easily and to be involved in or curling to wearer's bodyside.

Preferably 1.5～2.2 times of the expansion and contractions of shank pars contractilis 75.For example in the present embodiment, the expansion and contraction of shank pars contractilis 75 is set to 1.8～2.0 times.

In addition, expansion and contraction represents the flexible degree of the shank pars contractilis 75 in flexible direction (being goods length direction L in the present embodiment), as below, is prescribed.

Expansion and contraction=(length in the flexible direction of the shank pars contractilis 75 under maximum dilatation state)/(length in the flexible direction of the shank pars contractilis 75 under naturalness)

In addition, in this manual, this expansion and contraction is for example measured as below.

The 1st, in the situation that disposable diaper 10 is loaded into packaging body etc., from packaging body, take out disposable diaper 10.

Then, cut out the configuring area of shank pars contractilis 75.Now, also comprising back sheet material 60 ground that are engaged in shank pars contractilis 75 cuts out.The percentage elongation of the sample of the shank pars contractilis 75 after measurement cuts out, the percentage elongation of instrumentation shank pars contractilis 75.

Each sample is placed 60 minutes under 20 ℃ ± 2 ℃, the atmosphere of relative humidity 60% ± 5%RH, along the length of flexible orientation measurement shank pars contractilis 75.Using this length as " length of the shank pars contractilis 75 of naturalness ".

The 2nd, measure the length the flexible direction of length in the flexible direction of the desired area under this state (that is, naturalness) and the desired area when naturalness extends to the state of the fold that cannot be brought by elastic component by Visual Confirmation.Using this length as " length of the shank pars contractilis 75 under elongation state ".

Use these measurement results, with above-mentioned numerical expression, calculate, measure thus percentage elongation.

In addition, the interval of the medial extremity on the goods width W of the shank pars contractilis 75 of pair of right and left, along with going towards predecessor region 20 from territory, crotch zone 25 and broadening, and along with from territory, crotch zone 25 towards body region 30 go and broaden.

In the situation that disposable diaper 10 is worn to wearer's health, the shape broadening by shank pars contractilis 75 being configured to waistlines narrow in crotch bottom and towards front and back, shank pars contractilis 75 can be further along the profile of wearer's health, shank pars contractilis 75 is preferably configured in wearer's lower limb week under the state extending.

In addition, the interval of the end in the predecessor region 20 of the shank pars contractilis 75 of pair of right and left (D1 in figure), narrower than the interval (D2 in figure) of the end in the rear body region 30 of the shank pars contractilis 75 of pair of right and left.

In addition, these intervals are, by disposable diaper 10 from naturalness along goods length direction L and goods width W widen and remain the state that there is no fold, the distance of measuring between the medial extremity on the goods width W of shank pars contractilis 75 of pair of right and left obtains.

The stretching, extension of the skin surface of wearer's health, large especially at buttocks, in the position near its width outside, be obvious.In addition, shank pars contractilis 75 is closely attached on wearer's health.Therefore, by making D2>D1, even in the situation that disposable diaper 10 is applied with to wearer's action, shank pars contractilis 75 also can keep being adjacent to state and stretch in wearer's buttocks side, even if the variable quantity stretching is large, shank pars contractilis 75 can not stretch out yet.Thereby, can suppress the skew of the disposable diaper 10 that brought by shank pars contractilis 75.

In addition, the Shi Dang bottom, interval of wearer's both legs is the narrowest and go and the shape that broadens from crotch bottom towards veutro or dorsal part.Due to lower limb week peristome 35 and shank pars contractilis 75 are the shapes of extending towards the outside of goods length direction L and the outside of goods width W from territory, crotch zone 25, so can be along wearer's all peristomes 35 of lower limb week configuration lower limb and shank pars contractilis 75, can suppress local stress concentration, therefore, can be closely attached on wearer with lower percentage elongation, can alleviate the burden to skin.

Shank pars contractilis 75 is constituted as disposable diaper 10 is shunk along wearer's lower limb week bending.The end of the goods length direction L of shank pars contractilis 75 is configured to broaden on goods width W, be configured in body portion maintaining part near.Thus, the end of the goods length direction L of shank pars contractilis 75 with together with body portion maintaining part, along goods width W, shrink and play a role.

[the pars contractilis 200a of crotch]

The shape of the pars contractilis 200a of crotch then, is described.

The part of other of the pars contractilis 200a of crotch and absorber 40 is compared, and when disposable diaper 10 is dressed in wearer, the part being constituted as in territory, crotch zone 25 can maintain smooth shape.

Here, the pars contractilis 200a of crotch both can stretch along goods length direction L, also can stretch along goods width W, can also can stretch along goods length direction L and goods width W both sides.

For example, the pars contractilis 200a of crotch and shank pars contractilis 75 divide and are arranged independently, with the overlapping position of absorbent core 40a (in the present embodiment, surround the core thin film 40b of absorbent core 40a and the position between back sheet material 60), shrink the more than 60% of length (naturalness) of the goods width W of this locational absorbent core 40a.

Like this, by utilizing the pars contractilis 200a of crotch that the part that disposes absorbent core 40a is shunk, absorbent core 40a shortens, and compares with the part that absorbent core 40a does not shorten, and easily maintains smooth shape.

On the other hand, be positioned at than the pars contractilis 200a of crotch by the predecessor region 20 in the outside of goods length direction L and be positioned at the absorbent core 40a in rear body region 30, the pars contractilis 200a of Bu Yin crotch and shrinking.

Thereby, utilize cingulum 90 being maintained under wearer's waist or waist state around, the pars contractilis 200a of crotch that is maintained at the territory, crotch zone 25 of disposable diaper 10 with smooth shape can exceedingly not be closely attached on health, result, and the pars contractilis 200a of crotch is moderately configured along health.

In addition, at the pars contractilis 200a of crotch along goods length direction L can be flexible in the situation that, predecessor region 20 and rear body region 30 easily erect because the contraction of the pars contractilis 200a of crotch becomes, and when wearing, can along health, form smooth territory, crotch zone in wearer's crotch bottom.

Its result, because predecessor region 20 and the rear body region pars contractilis 200a of 30Cong crotch erect, so 10 couples of wearers' of disposable diaper matching improves.

That is, due to the contraction of the pars contractilis 200a of crotch, can with the territory, crotch zone 25 of disposable diaper 10, be configured in the mode of wearer's crotch bottom, stably wear disposable diaper 10.

In addition, as mentioned above, because the pars contractilis 200a of crotch is constituted as, can stretch, thus the part in the territory, crotch zone 25 of disposable diaper 10 shrink, disposable diaper 10 the surface of clothing side (non-skin bearing surface side S2) form concavo-convex fold.

Its result, can be visually and in sense of touch, remind and wear auxiliary clearly have crotch 200 in the disposable diaper 10 of present embodiment.

Particularly, the pars contractilis 200a of crotch is configured to, and strides across the centrage O of the goods width W of disposable diaper 10, at least with the region overlapping that disposes absorber 40.

For example, crotch's pars contractilis 200a also can be equipped between absorber 40 (core thin film 40b) and back sheet material 60.

In addition, crotch's pars contractilis 200a also can consist of Stretchable sheet.

By consist of the pars contractilis 200a of crotch Stretchable sheet, the absorbent core 40a that disposes the region of Stretchable sheet similarly dwindles, and becomes and more easily maintains smooth shape.In addition, Stretchable sheet for example can be by forming with the same Stretchable sheet of shank pars contractilis 75.

For example, as this Stretchable sheet, can use the thermoplastic elastomer resin of melting as polyurethane, styrene and form membranaceous retractility film, the flexible nonwoven fabrics being formed by contractile fibre, the local composite sheet that is cut off or is formed by the fragile non-extension sheet material of having changed of laminating etc. on retractility film or flexible nonwoven fabrics.

In addition, as the replacement of this Stretchable sheet, also can by by the wire-band shape being formed by polyurethane elastic fiber or natural rubber can be flexible elastic component arrange side by side mutually and form the pars contractilis 200a of crotch.

In this case, can consider the rigidity of absorbent core 40a and form disposable diaper 10 other the rigidity of member and the thickness of suitable selection elastic component used and the pitch configuring, but preferably, when making disposable diaper 10 bodies be naturalness (non-stretched condition), the whole region of side edge part on the goods width W of absorbent core 40a becomes the state of contraction.

In addition,, owing to absorbent core 40a similarly being dwindled by the pars contractilis 200a of crotch, elastic component interval is each other preferably below 7mm, more preferably below 5mm.In addition,, due to absorbent core 40a is similarly dwindled, comparatively it is desirable to make the difference at the interval of adjacent elastic component is below 2mm.

Particularly, the expansion and contraction of crotch's pars contractilis 200a is preferably more than 1.2 times and below 1.8 times.For example in the present embodiment, the expansion and contraction of crotch's pars contractilis 200a is set to 1.3 times.

Expansion and contraction represents the flexible degree of the pars contractilis 200a of crotch in flexible direction (being goods length direction L in the present embodiment), as below, is prescribed.

Expansion and contraction=(length in the flexible direction of the pars contractilis 200a of crotch under maximum dilatation state)/(length in the flexible direction of the pars contractilis 200a of crotch under naturalness)

The 1st, in the situation that disposable diaper 10 is loaded into packaging body etc., from packaging body, take out disposable diaper 10.Under this state, under 20 ℃ ± 2 ℃, the atmosphere of relative humidity 60% ± 5%RH, place 60 minutes, along the length of the flexible orientation measurement pars contractilis 200a of crotch.Using this length as " length of the pars contractilis 200a of crotch of naturalness ".

The 2nd, measure the length the flexible direction of length in the flexible direction of the desired area under this state (that is, naturalness) and the desired area when naturalness extends to the state of the fold that cannot be brought by elastic component by Visual Confirmation.Using this length as " length of the pars contractilis 200a of crotch under elongation state ".

Use these measurement results, by calculating with above-mentioned numerical expression, measure percentage elongation.

Like this, by making the expansion and contraction of the pars contractilis 200a of crotch, be 1.2 times of above and below 1.8 times, can preferably to follow wearer skin flexible.

For example, if wearer takes health front side to shrink such anteflexion posture,, on the skin of wearer's buttocks side, there is the position of stretching 30% left and right with respect to the state that has stretched health.

; if the expansion and contraction of the pars contractilis 200a of crotch is less than 1.2 times; the contraction of the pars contractilis 200a of crotch under naturalness is insufficient; compare with the situation that is not provided with the pars contractilis 200a of crotch; the contraction of the absorber configuring area in the territory, crotch zone 25 of disposable diaper 10 is little; the territory, crotch zone 25 of disposable diaper 10 becomes insufficient in wearer's crotch bottom along obtaining corporally smooth shape, and disposable diaper 10 is easily offset from wearer's health.

On the other hand, if the expansion and contraction of the pars contractilis 200a of crotch is greater than 1.8 times, the contraction size on the shrinkage direction of crotch's pars contractilis 200a becomes excessive, therefore, the region that the pars contractilis 200a of crotch exists more easily becomes the state being adjacent to comparing along health, and disposable diaper easy 10 is displaced to wearer's below.

In addition, the amount of contraction on the goods length direction L of crotch's pars contractilis 200a also can become 2～8% of length on the goods length direction L of disposable diaper 10.

In addition, it is fully little that amount of contraction is that fold becomes, the surface of sample become approach length " b (mm) " under the state extending smoothly and flexible direction along sample towards naturalness under length " a (mm) " poor, can calculate by (b-a).

Amount of contraction on the goods length direction L of the pars contractilis 200a of inventor Shi crotch be length on the goods length direction L of disposable diaper 10 2～8% time, disposable diaper 10 is being dressed in wearer's process, can confirm, the pars contractilis 200a of crotch is the easy health along wearer comparatively ideally.

Here, amount of contraction on the goods length direction L of the pars contractilis 200a of Ruo Shi crotch is greater than 8%, crotch's pars contractilis 200a too shortens, the curtailment of the goods length direction L of disposable diaper 10, is difficult to that disposable diaper 10 is attached to wearer's health or disposable diaper 10 and wearer's health is exceedingly adjacent in territory, crotch zone 25 and easily skew.

On the other hand, the amount of contraction on the goods length direction L of the pars contractilis 200a of Ruo Shi crotch is less than 2%, and the effect itself that disposable diaper 10 is close to the such pars contractilis 200a of crotch of wearer's health becomes and is difficult to manifest.

Particularly crotch's pars contractilis 200a is preferably that Stretchable sheet member below 10% forms by contracting amplitude-frequency.

In addition, in this manual, this contracting amplitude-frequency is for example measured as below.

The 1st, from disposable diaper 10, pull down the pars contractilis 200a of crotch, the pars contractilis 200a of crotch pulling down is placed on to 20 ℃ ± 2 ℃, the atmosphere of relative humidity 60% ± 5%RH after lower 24 hours, the lamellar elasticity key element width (WA) of the width of the central position of the goods width W when being equivalent to from the pars contractilis 200a of crotch to disposable diaper 10 configuration under naturalness.

The 2nd, the whole width of the waist pars contractilis 100 of having pulled down is held in to the measurement chuck of cupping machine (society of Shimadzu Seisakusho Ltd. autoplotter processed), width while upholding to disposable diaper 10 attaching with the speed of 100mm/ minute, the width (WB) of the central position of the goods width W of the pars contractilis 200a of crotch when measurement is equivalent to disposable diaper 10 configuration.

Then, use (WA) measured and (WB), according to following numerical expression, calculate contracting amplitude-frequency.

Contracting amplitude-frequency (%)=((WA)-(WB))/(WA)) * 100

In addition, the center O 2 of the pars contractilis 200a of crotch on goods length direction L is configured in the forward body of center O 1 region 20 sides than the disposable diaper 10 on goods length direction L.In addition, crotch's pars contractilis 200a is configured to stride across the center O 1 of the disposable diaper 10 on goods length direction L.

In addition, crotch's pars contractilis 200a is formed on the position of the center O 1 that comprises the disposable diaper 10 on goods length direction L.

In addition, the length (naturalness) on the goods length direction L in rear body region 30 is longer than the length (naturalness) on the goods length direction L in predecessor region 20.

Particularly, the ratio of the length (naturalness) on the length (naturalness) on the goods length direction L in rear body region 30 and the goods length direction L in predecessor region 20, be preferably more than 1.1 and below 1.6, more preferably more than 1.2 and below 1.5.

If this ratio surpasses 1.6, the veutro of disposable diaper 10 and the balance of dorsal part lose, and the pars contractilis 200a of Shi crotch is in the situation in territory, crotch zone 25, and predecessor region 20 can exceedingly be adjacent to or more than rear body region 30 capped necessity.

Particularly, because wearer's health generally becomes the buttocks state more outstanding than hypogastric region, so on the basis of the pars contractilis 200a of Shi crotch and wearer's crotch bottom coupling, by making above-mentioned ratio, it is above-mentioned scope, with respect to the shape of complicated wearer's health, disposable diaper 10 becomes more applicable shape.

That is, can prevent the stretching out of part because producing the disposable diaper 10 that the part of undersize brings, because producing disposable diaper 10 that the remaining part of size brings and the unwanted gap between health.

In addition, particularly in the situation that before starting for walking or just started the baby after walking, the posture of preferably taking health to curl towards veutro, under such posture, the skin of buttocks side easily becomes the state of stretching, extension, by making above-mentioned ratio, be above-mentioned scope, become the state of the baby's who is applicable to easily taking such posture health.

Row are given one example, goods length 400mm (length of the naturalness on goods length direction L) with respect to disposable diaper 10, predecessor region 20 is set to 130mm (length of the naturalness on goods length direction L), crotch 200 is set to 80mm (length of the naturalness on goods length direction L), and rear body region 30 is set to 190mm (length of the naturalness on goods length direction L).

In this case, predecessor region 20 is approximately 1.46 with the ratio of the length (naturalness) in rear body region 30.By the ratio as such, crotch's pars contractilis 200a not only, and also the goods length direction L integral body that can make disposable diaper 10 is further along wearer's health.

That is, according to this structure, by determining the fore-and-aft direction position of the pars contractilis 200a of crotch, can realize more reliably the health that disposable diaper 10 is suitable for wearer exactly, make the design of disposable diaper 10 such target of the present invention that can link.

Because crotch's forward body of the pars contractilis 200a of the contracted state Yu Bi of pars contractilis 200a crotch region 20 sides are compared in different states with the non-contraction state of the absorber configuring area of rear body region 30 sides, so in the situation that making wearer wear disposable diaper 10, easily the pars contractilis 200a of crotch and wearer's crotch bottom is worn matchingly.

In addition, according to this configuration, due under the contracted state in position of absorbent core 40a that is provided with the pars contractilis 200a of crotch, the rigidity at this position or thickness are different from rigidity or the thickness at the position of other absorbent core 40a, so wear the position consistent with wearer's crotch bottom, territory, crotch zone 25 that auxiliary is easily identified in disposable diaper 10.

In addition, after wearing disposable diaper 10, the pars contractilis 200a of crotch maintains smooth shape in wearer's crotch bottom, disposable diaper 10 itself becomes three-dimensional shape, can make the territory, crotch zone 25 of disposable diaper 10 along wearer's crotch bottom, therefore, the territory, crotch zone 25 of disposable diaper 10 and wearer's crotch bottom are as one man become more reliable by dress.

In addition, as shown in Figure 1, also can be configured to, the length W5 (naturalness) of the goods width W of the middle position O2 of the pars contractilis 200a of crotch on goods length direction L is shorter than the length W6 (naturalness) of the goods width W of the end of the pars contractilis 200a of crotch on goods length direction L.

According to this structure, the shape attenuating in the middle of for example becoming as the crotch bottom of women's underwear due to the shape of observing from the outward appearance of the pars contractilis 200a of crotch, so wearing auxiliary while making wearer wear disposable diaper 10, the mode that can be configured in wearer's crotch bottom with the pars contractilis 200a of crotch is worn, and visual confirmation is worn position more accurately.

In addition, when wearing, also can remind and wear auxiliary and on disposable diaper 10, there is crotch 200, give more to approach the impression of underwear.

In addition, the second sheet material 51 is configured to, with the region overlapping that disposes the pars contractilis 200a of crotch.

According to this structure, in wearer's crotch bottom, the position that absorbent core 40a hangs down is not set, its result, can improve the diffusibility of Excreta A of second sheet material 51 in the region overlapping with the pars contractilis 200a of crotch.

In addition,, because the second pars contractilis 200a of sheet material 51Yu crotch when wearing disposable diaper 10 is overlapping, so shrink this overlapping region, easily produce fold.

Therefore, as mentioned above, by formed fiber in the second sheet material 51, the second sheet materials 51 hydrogen bonded each other by cross-linked cellulose fibres, compare and become less state with the situation of using common cellulose fibre, can improve thus the degree of freedom of the fiber in the second sheet material 51.

Its result, in contracted situation, by improving the degree of freedom of fiber, also suppressing the generation of fold by the pars contractilis 200a of crotch, therefore, improves fibre density while can suppress the generation of fold in above-mentioned overlapping region.

That is,, when wearing disposable diaper 10 (particularly before excretion), can make excremental maintenance and diffusion keep excellent state.

As shown in Figure 1, in the territory, crotch zone 25 of absorber 40, be formed with notch part 110 and notch part 120.Notch part 110 and notch part 120 are the regions that do not have the absorbent core 40a that forms absorber 40.

In the present embodiment, notch part 110 and notch part 120 belong to the weight per unit area low rigid portion lower than the position of other absorbent core 40a of absorbent core 40a.

In addition, also can replace forming notch part 110 and notch part 120, make the weight per unit area of absorbent core 40a lower than the position of other absorbent core 40a.

As shown in Figure 1, notch part 110 and notch part 120 form along the edge on the goods length direction L of the pars contractilis 200a of crotch.

In addition, even in the situation that being formed with notch part 110 and notch part 120, also the absorbent core 40a that is preferably placed at predecessor region 20 and rear body region 30 is not exclusively cut off ground continuously with the absorbent core 40a that is positioned at territory, crotch zone 25, particularly preferably continuous on goods width W.

Notch part 110 and notch part 120 are constituted as, and along with going to the outside of goods width W, the length (naturalness) on goods length direction L is elongated.

According to such shape, the outside of the goods width W of absorbent core 40a becomes and more easily shortens, and therefore, can on disposable diaper 10, form smooth " bottom ".

In addition, be positioned at than the absorbent core 40a of the forward body of notch part 110 region 20 sides and be positioned at the absorbent core 40a by rear body region 30 sides than notch part 120, from smooth " bottom ", erect, the fillet ground of the easy health (abdominal part and buttocks) along wearer is crooked, therefore, can make the shape of disposable diaper 10 own closer to wearer's the bodily form.

As shown in Figure 1, the 20Ce edge, predecessor region of notch part 110 and than notch part 120 by 30Ce edge, rear body region, can be also circular-arc.

Particularly, the 20Ce edge, predecessor region of notch part 110 is being centered close to than the such shape of Kao Houshen region, this edge 30 sides of circular arc, and the 30Ce edge, rear body region of notch part 120 is being centered close to than the such shape of this edge forward body region 20 sides of circular arc.

According to such shape, the distortion along the fillet of the wearer's of disposable diaper 1 health, is more prone to and easily produces significantly.

The 20Ce edge, predecessor region of the goods length direction L of notch part 110 forms the 1st and becomes turn of bilge 115, and the 30Ce edge, rear body region of the goods length direction L of notch part 120 forms the 2nd and becomes turn of bilge 125.

In addition, the 1st becomes turn of bilge 115 and the 2nd becomes turn of bilge 125 along goods width W extension, becomes the crooked basic point of disposable diaper 10.

Here, notch part 110 and notch part 120 are become better state and form in order to make the 1st change turn of bilge 115 and the 2nd become turn of bilge 125.

Its result, the pars contractilis 200a of crotch is constituted as, and does not link with the action of body portion maintaining part (, forming predecessor region 20, rear body region 30 and the cingulum 90 of body portion maintaining part).

As shown in Figure 1, in the disposable diaper 10 of present embodiment, under naturalness, it is symmetrical that the pars contractilis 200a of crotch both can stride across the centrage O of goods width W, also the centrage O of goods width W of can take is boundary, and the difference of the width of the left and right of the pars contractilis 200a of crotch is in 10%.

According to the disposable diaper 10 of present embodiment, the center that the pars contractilis 200a of crotch can form the health that strides across wearer is worn on the state of wearer's crotch bottom.

In addition,, in the disposable diaper 10 of present embodiment, the pars contractilis 200a of crotch and above-mentioned body portion maintaining part and elastic component 71 arrange discretely.

In addition, in the disposable diaper 10 of present embodiment, predecessor region 20 sides and rear body region 30 sides at the goods length direction L of the pars contractilis 200a of crotch, be provided with non-stretching region.

In addition,, in the disposable diaper 10 of present embodiment, as shown in Figure 1, the length of the goods width W of absorbent core 40a is gone towards territory, crotch zone 25 from predecessor region 20 and is shortened, and goes and shorten from rear body region 30 towards territory, crotch zone 25.

Here, crotch's pars contractilis 200a is located at the short region of Length Ratio specific length of the goods width W of absorbent core 40a.

For example, specific length is the length of the goods width W of the absorbent core 40a in the region that the length of goods width in predecessor region 20 or rear body region 30 is long.

In the long region of the Length Ratio specific length of the goods width W in the short region of the Length Ratio specific length of the goods width W of absorbent core 40a and predecessor region 20 and rear body region 30, the absorptive capacity of the unit length of goods length direction L (for example every 10mm) is different, and the absorptive capacity in the region shorter than this specific length is little.

As shown in Fig. 3 (a) and Fig. 3 (b), in the situation that disposable diaper 10 is worn by wearer, because the pars contractilis 200a of crotch forms smooth " bottom " in wearer's crotch bottom, disposable diaper 10 can and wearer between keep appropriate space, can not hang down in wearer's crotch bottom after having absorbed Excreta A yet.

Therefore, the second sheet material 51 does not produce the such state of affairs of bending yet, and the Excreta A that the scavenge port from wearer can be drained suitably sucks, is held in this second sheet material 51.

In addition, by forming smooth " bottom ", compare with the situation that disposable diaper 10 hangs down, the diffusion that is inhaled into the Excreta A in the second sheet material 51 is difficult to be subject to the impact of gravity, and therefore, the diffusion of Excreta A is preferably carried out.

In addition, because disposable diaper 10 is worn along wearer's health, so comprise the second sheet material 51, together with absorber 40, be not closely attached on interiorly wearer's health, the second sheet material 51 can not be subject to the pressurization bringing by being adjacent to yet, therefore, the suction velocity of the Excreta A in the second sheet material 51 is also better.

That is, maintenance, diffusion and the suction of the Excreta A of the function having as the second sheet material 51, become the state that can bring into play performance originally.

Thereby according to the disposable diaper 10 of present embodiment, a large amount of Excreta A is present in the space between wearer and disposable diaper 10, according to wearer's action, leaks into state such outside disposable diaper 10 and also become and be difficult to produce.

In addition, as shown in Figure 1, the pars contractilis 200a of crotch does not set from body portion maintaining part 150 across discretely with body portion maintaining part 150.

Length on the goods width W of the pars contractilis 200a of crotch is the more than 1/2 of length on the goods width W of the absorbent core 40a in the region that exists of the pars contractilis 200a of crotch.

Thereby the certain width that makes to dispose the position of absorbent core 40a due to the pars contractilis 200a of crotch shrinks above, thereby absorbent core 40a shortens, thereby absorbent core 40a lifts the health that approaches wearer.

By realize lifting of such absorbent core 40a in territory, crotch zone 25, can reduce the gap between disposable diaper 10 and wearer.

In the situation that the more than 60% of length on the goods width W of the absorber 40 (absorbent core 40a) in the region that the length on the goods width W of the pars contractilis 200a of crotch is the pars contractilis 200a of crotch to be existed, be more preferably in more than 80% situation, can further reduce the gap between disposable diaper 10 and wearer.

In addition, if the Length Ratio on the goods width W of the length on the goods width W of the pars contractilis 200a of crotch and absorbent core 40a is more narrow, be difficult to obtain lifting the effect of above-mentioned absorbent core 40a.

On the other hand, if the Length Ratio on the length on the goods width W of the pars contractilis 200a of crotch and the goods width W of absorbent core 40a is more wide, under the state more shrinking than the position that disposes absorbent core 40a at the position that does not configure absorbent core 40a, disposable diaper 10 is worn.

Thus, the member that forms the position that does not configure absorbent core 40a overlaps each other, the pars contractilis 200a of crotch hardening, and the wearing feeling of disposable diaper 10 is impaired.

For example, in the situation that the size (elongation state) at the narrowest position of length on the goods width W of the absorbent core 40a in the region that the pars contractilis 200a of crotch exists is 120mm, preferably the length on the goods width W of the pars contractilis 200a of crotch is 60～110mm, is more preferably 90～110mm.

The narrowest position of length on the goods width W of absorbent core 40a, is preferably located at 10～60mm front side with respect to the centrage of goods length direction L.

Preferably the narrowest position of length on the goods width W of absorbent core 40a, is located at 20～40mm front side with respect to the centrage of goods length direction L.

Preferably the pars contractilis 200a of crotch strides across the narrowest position of length on the goods width W of absorbent core 40a and forms.

The mutual immediate position of huckle of wearer's left and right is the forward side in fore-and-aft direction Shang Bi center of wearer's health.Thereby, due to the contractility of the pars contractilis 200a of crotch, the narrowest position of length on the goods width W of absorbent core 40a can be configured in energetically to the mutual immediate position of huckle of wearer's left and right.In other words, even if mother etc. wear auxiliary, not carry out the position of absorbent core 40a involutory, and the position of absorbent core 40a is involutory also can carry out naturally.

In addition, the ratio (weight) that is contained in the fiber in absorbent core 40a preferably, below 20%, is more preferably below 10%.

In situation (being more than 80% situation) due to the high absorption polymer ratio in improving absorbent core 40a, the liquid suction velocity of absorbing polymeric is lower to the suction velocity of the second sheet material 51 than Excreta, so for Leakage prevention, by configuring the second pars contractilis 200a of sheet material 51He crotch, improve excremental liquid suction velocity and diffusibility on one side, on one side do not make disposable diaper 10 be adjacent to and along wearer's health, guarantee thus excremental maintenance space, thus can realize thinner, flexibility is high, be difficult to the disposable diaper 10 that leaks.

(modification)

The situation of the 1st embodiment described above is such, also can replace the pars contractilis 200a of crotch that at least can telescopically form along goods length direction L, uses edge on goods length direction L to be formed with the crotch of pleat portion.

For crotch being formed to smooth " bottom ", this pleat portion is constituted as a part that pinches back sheet material 60.

Or the situation of the pars contractilis 200a of crotch the 1st embodiment described above is such, also can replace the pars contractilis 200a of crotch that at least can telescopically form along goods length direction L, use the crotch forming by strengthening sheet material.

In addition, the second sheet material 51 also can be constituted as, on goods length direction L, surpass the pars contractilis 200a of crotch goods length direction L end extend.

According to this structure, what can the pars contractilis 200a of Jiang You crotch form the 1st becomes turn of bilge 115 and the 2nd curved state of change that becomes turn of bilge 125 forms the more level and smooth state in appearance with fillet.Its result, can not cause by the 1st change turn of bilge 115 and the 2nd and become the discomfort that turn of bilge 125 brings wearer.

Above, with above-mentioned embodiment, the present invention is at length illustrated, but for a person skilled in the art obviously the present invention be not limited to the embodiment having illustrated in this manual.The present invention can not depart from the spirit and scope of the invention that claims limit as correction and alter mode and implement.Thereby the record of this description is that to illustrate be object, the present invention is not had to the meaning of any restriction.

In addition, by reference, the full content of Japanese patent application No. 2012-259176 (application on November 27th, 2012) is incorporated into this description.

In industry, utilize probability

The present invention can provide a kind of can more desirably manifest absorption maintenance function and the diffusion function of being located at the second sheet material between absorber and top-sheet, its result, reduce the amount of the discharged liquid be present in the space between wearer and disposable diaper, can suppress the disposable diaper that discharged liquid that the action because of wearer causes is leaked to outside.

The explanation of Reference numeral

10 ... disposable diaper

20 ... predecessor region

25 ... territory, crotch zone

30 ... rear body region

35 ... the all peristomes of lower limb

40 ... absorber

40a ... absorbent core

40b ... core thin film

50 ... top-sheet

51 ... the second sheet material

60 ... back sheet material

61 ... leakproof sheet material

70 ... flank sheet

71 ... elastic component

75 ... shank pars contractilis

80 ... leg side rivel

81 ... bonding part

82 ... free end portion

90 ... cingulum

90a ... target portion

100 ... waist pars contractilis

200 ... crotch

200a ... crotch's pars contractilis

Claims

1. a disposable diaper,

This disposable diaper has predecessor region, rear body region and the territory, crotch zone between above-mentioned predecessor region and above-mentioned rear body region,

This disposable diaper is formed with pair of leg week peristome, and,

This disposable diaper possesses absorber, and this absorber strides across territory, above-mentioned crotch zone, and at least one party towards above-mentioned predecessor region and above-mentioned rear body region extends,

This disposable diaper have from above-mentioned predecessor region towards above-mentioned the goods length direction in body region and with the goods width of said products length direction quadrature,

It is characterized in that,

This disposable diaper possesses:

Body portion maintaining part, in above-mentioned predecessor region and above-mentioned rear body region, extends along said products width, above-mentioned disposable diaper is remained on wearer's health; And

Crotch's pars contractilis, is formed on territory, above-mentioned crotch zone, at least along said products length direction, can stretch,

Above-mentioned crotch pars contractilis is configured to, and strides across the centrage of the said products width of above-mentioned disposable diaper, at least with the region overlapping that configures above-mentioned absorber,

Above-mentioned crotch pars contractilis not with above-mentioned body portion maintaining part across from liftoff the setting of above-mentioned body portion's retaining part,

In the skin bearing surface side by above-mentioned disposable diaper than above-mentioned absorber, possess the top-sheet of liquid permeability,

Between above-mentioned top-sheet and above-mentioned absorber, possess the second sheet material of the liquid permeability more fluffy than above-mentioned top-sheet,

Above-mentioned the second sheet material is configured to, with the region overlapping that disposes above-mentioned crotch pars contractilis.

2. disposable diaper according to claim 1, is characterized in that,

Along the edge on the said products length direction of above-mentioned crotch pars contractilis, the weight per unit area that is formed with the absorbent core that forms above-mentioned absorber is than low region, other region or do not have the region of above-mentioned absorbent core.

3. disposable diaper according to claim 1 and 2, is characterized in that,

Above-mentioned crotch pars contractilis is that Stretchable sheet member below 10% forms by contracting amplitude-frequency.

4. according to the disposable diaper described in any one in claim 1～3, it is characterized in that,

Above-mentioned the second sheet material on said products length direction, surpass above-mentioned crotch pars contractilis said products length direction end extend.

5. according to the disposable diaper described in any one in claim 1～4, it is characterized in that,

Above-mentioned crotch pars contractilis is located at the non-skin bearing surface side of above-mentioned absorber,

Above-mentioned the second sheet material comprises cross-linked cellulose fibres.

6. according to the disposable diaper described in any one in claim 1～5, it is characterized in that,

The length of the naturalness of the said products width of the middle position of the above-mentioned crotch pars contractilis on said products length direction, shorter than the length of the naturalness of the said products width of the end of the above-mentioned crotch pars contractilis on said products length direction.

7. according to any one in claim 1～6, record described disposable diaper, it is characterized in that,

The weight rate that is contained in the fiber in the absorbent core that forms above-mentioned absorber is below 20%.

8. according to the disposable diaper described in any one in claim 1～7, it is characterized in that,

Length on the goods width W of above-mentioned crotch pars contractilis is the more than 1/2 of length on the goods width W of the above-mentioned absorber in the region that exists of above-mentioned crotch pars contractilis.