CN1450884A

CN1450884A - Abcorent articles exhibiting improved and bending softness

Info

Publication number: CN1450884A
Application number: CN00819305.3A
Authority: CN
Inventors: 加里·D·拉沃恩; 西尔克·阿恩特; 马赛厄斯·K·希普; 安德烈亚·L·林克; 马蒂厄斯·施米特
Original assignee: Procter and Gamble Ltd
Current assignee: Procter and Gamble Ltd; Procter and Gamble Co
Priority date: 2000-03-10
Filing date: 2000-03-10
Publication date: 2003-10-22
Also published as: AU2000236228A1; JP2003526464A; KR20020077531A; MXPA02008155A; BR0017152A; EP1267769A1; WO2001068022A1; CA2399797A1

Abstract

An absorbent article, in particular a diaper, having a composite comprising a topsheet, a backsheet, and an absorbent structure in between, which upon application of a deformation force first buckles with a certain buckling resistance corresponding to a buckling force, whereby upon further deformation the buckling deformation mechanism changes to a bending deformation mechanism with a corresponding lower deformation force.

Description

Show the absorbent device of improved distortion and crooked pliability

Technical field

The present invention relates to absorbent device, such as baby diaper, training pants, adult-incontinence articles, maternal protection articles for use or the like.Particularly, the present invention relates to such articles for use, it makes the wearer very comfortable by being designed to present special pliability, more particularly relates to present the articles for use of high liquid bulk disposal ability.

Background technology

Baby and the absorbent device of other incontinent individuals wear as diaper absorb and retain urine and other body exudates.Absorbent device had both played the effect of holding EM, also played these materials and wearer's body and wearer's clothes and the isolated effect of sheet.Having the disposable absorbent article that many differences design substantially is known in the art.For example, the title of authorizing Duncan and Baker on January 31st, 1967 is for having described a kind of disposable diaper that has obtained to accept extensively with business success among the U.S. reexamination patent Re 26152 of " disposable diaper ".Authorized the United States Patent (USP) 3860003 of the title of Buell for " the contractile sidepiece that is used for disposable diaper " on January 14th, 1975, described a kind of elastic leg closing in disposable diaper, it has obtained to accept extensively and business success.

Except hold with isolation requirement, extensively will be appreciated that, for the wearer, comfortable be the design these class articles for use an importance.Although several different methods is known for the articles for use of similar trousers pad or menopad, announced such as US-A-4950264 (people such as Osborne), in the zone of dry and the articles for use particularly when moistening, between wearer's two lower limbs, laid, comparatively extensive and more usually for the design of demand high liquid handling property (such as being used for the articles for use that baby or incontinence are grown up).A trial of improvement wearer comfort level is in these cases described in United States Patent (USP) 4610678 people such as () Weisman.In the United States Patent (USP) 5098423 of authorizing people such as Pieniak, a kind of disposable diaper of low dry bulk density has been described, (in patent, be defined as two and 3/5ths of articles for use length in " influence area " especially when paying close attention to drying, that is, roughly in wearer's crotch district) in low cross-sectional area.Its basic skills is hygroscopic material to be dispersed in this influence area spread all over than large tracts of land, and in use it can swell by being pressed between wearer's both legs.

Another kind of technical concerns is in providing the high-performance absorbent device, and these articles for use have narrow crotch district, low thickness and high liquid handling performance, for example referring to PCT bulletin WO98/43580.May cause the structure made by potential stiffening material to the liquid handling performance requirements of the strictness of these articles for use, perhaps comprise complex than soft material, these than soft material by in conjunction with losing a large amount of flexibilities again, thereby form lamination or laminate-type structure.Yet these elements show the stiffness of remarkable increase usually, as from so-called as reinforcing element " interlayer " structure or from the cardboard ripple struction, can know.

Thus, although made several trials, still need under the situation of the effluent handling property of not sacrificing articles for use, improve wearer comfort for the pliability of the absorbent device that improves high liquid handling performance.

Summary of the invention

The present invention is a disposable absorbent article, having will be at the crotch district and at least one petiolarea that are arranged between the operating period of its expectation between wearer's both legs, this absorbent device comprises by top flat, is bonded to the complex that egative film on the top flat and the absorbent structure between the two constitute, and absorbent structure extends on the part of described crotch district and petiolarea at least.Particularly, this complex shows volume softness force (BS) for crotch district and petiolarea displacement (s) is concerned, it can be expressed as mathematic curve, therefrom can determine derivative (d{BS}/ds)=(BS '), it is the shift value (s of null value for these complexs have curve at least one zone derivative ₀).For this shift value (s ₀), complex shows the volume softness force value { BS (s less than 10N ₀), preferably less than 7.5N, be more preferably less than 5N.

Preferably, the volume pliability in the crotch district is less than petiolarea, preferably less than 5N, more preferably less than 3N.

In the preferred embodiment of absorbent structure, it comprises the wicking layer, and this wicking layer has the volume softness values less than 3N, preferably less than 1N.This wicking layer can be fibrous width of cloth sheet, is handled by aftershaping activation processing process, preferably handles by secondary (double pass).Absorbent structure can also have securing layer, has the volume pliability less than 3N, preferably less than 1N.

Absorbent structure can comprise the moisture absorption complex of another lamination, as supporting course, also comprises absorbing liquid and the granule that can be incorporated on the described supporting course, as superabsorbent gelatin polymer, polymer foams and combination thereof.

The moisture absorption complex of this lamination can be discrete, has at least two and vertically goes up district at interval, and preferably, at least one in these districts extends into the petiolarea of described articles for use, preferred back zone.

The supporting course that the moisture absorption complex of lamination is used can comprise thin paper, non-woven fleece, yarn fabric or foaming structure, and granule can be attached on it by combination, and combination is as melting and spraying hot-melt adhesive.The moisture absorption complex of lamination comprises fixed gelatin polymer, and the fixed degree of preferred particulates is dry quantitative at least about 80%, preferably at least about 95%.

Granule quantitatively can be greater than about 100g/m ², be preferably greater than about 300g/m ², more preferably greater than about 500g/m ²Absorbent structure can be designed to possess the moisture absorption capacity, thereby described crotch district has final moisture absorption capacity, and it is less than 55% of total final moisture absorption capacity of described absorbent structure.Absorbent structure also can be designed to possess the final moisture absorption capacity of described absorbent structure, is positioned at about 60% of the crotch final storage capacity that to put the final moisture absorption capacity of position backward be total articles for use.

Of the present invention one special aspect, absorbent device with absorbent structure can have two centers of aliging in each side of articles for use longitudinal centre line, with in outside localized two side zones of the side direction of the described corresponding center of described absorbent structure, and absorbent structure comprise have before and the preceding and low back end limit of low back end hem width degree, outward extending width reaches the wideest part 25% of absorbent structure to each side zones from the center.This absorbent structure also has into the two-layer at least hygroscopic material of contact relation, therefore define common contact surface district, these two synusia are bonded to one another by adhering device thus, adhering device is as covering the hot-melt adhesive of adhering device area, the adhering device area is long-pending less than common contact surface, thereby at least 75% adhering device area is arranged in the central core zone.

Description of drawings

Fig. 1 is an absorbent device.

Fig. 2 is schematically illustrating of crotch point (crotch point) definition.

Fig. 3 to 5 is used for absorbent article core of the present invention.

Fig. 6 is volume pliability (bulk softness) method/chuck figure.

Fig. 7 is the typical plot that is recorded by the volume pliability.

The specific embodiment

Integrated definition

Refer to the device that absorbs and hold body exudates at this used term " absorbent device ", more particularly, refer to and place on the wearer's body or neighbouring to absorb and to hold the device of the effluent that various healths discharge.Absorbent device comprises the device that is designed to by the absorption urine of incontinence adult use.These incontinence articles include, but is not limited to be designed for the articles for use that are received in the big quantity of fluid under the higher speed of shoving, such as diaper, and adult-incontinence medicated underpants, training pants, diaper holders and liner.Term " disposable " is used herein to describes such absorbent device, its do not plan to be washed keep or once more as absorbent device (promptly, absorbent device plans just to abandon after once using, preferably can recovery, compost or dispose in a kind of mode of control environment)." whole " absorbent device refers to discrete each several part and combines the absorbent device that forms the integral body that cooperates, thereby this absorbent device does not need discrete functional unit, as discrete holder and liner.

Refer at this used term " absorbent article core " that playing of absorbent device obtained, disperseed, those parts of the effect of transmission, storage and/or redispersion liquid (as, each layer).Obtain material and comprise that it mainly acts on is the material that obtains, discharges then liquid.These materials comprise mobile securing layer, top sheet materials, transfer layer, the Control Component that flows, parcel tissue or nonwoven sheet such as being designed to prevent hydrogel molding polymer.Refer to absorbent article core material (one or more) at this used term " dispersion ", its mainly act on be absorb and with the dispersing liquid of liquid dispersion/once more to those those some places away from the initial liquid load(ing) point.Refer to the absorbent article core material of preservation at this used term " storage medium " by most of liquid of articles for use absorption.Should be appreciated that term " dispersion " and " storage medium " are not to repel mutually.In certain embodiments, a kind of material can provide the function of dispersing liquid and storage of liquids.

It is forward that part of that the plan that refers to articles for use or absorbent article core at this used term " preceding " is positioned at the wearer.The plan that term " back " refers to articles for use or absorbent article core is positioned at that part of of wearer back.So, the use of relational language " front portion " refer to articles for use or core towards the forward position of articles for use or core, and the use of term " rear portion " refer to articles for use or core towards the position at the rear portion of articles for use or core.

Refer to perpendicular to the length of element, core or articles for use and the direction of width at this used term " z-to ".Z is to common thickness corresponding to element, core or articles for use.

Refer to plane at this used term " x-y to " perpendicular to the thickness of element, core or articles for use.X and y direction correspond respectively to the width and the length of element, core or articles for use usually.

" the crotch point " of articles for use and articles for use absorbent article core is by placing articles for use the wearer to make the wearer be in stand up position on one's body then, then extensible silk thread (filament) being held both legs and become 8 font configurations to determine.(see figure 2).The crotch point that is considered to articles for use and absorbent article core in articles for use and the absorbent article core corresponding to the point in the cross point of silk thread.Be appreciated that by absorbent device being placed in a predefined manner on one's body the wearer, determine that then the silk thread that intersects can contact articles for use and absorbent article core wherein and determine the crotch point.

Be equivalent to 50% (that is, y to) of absorbent article core length overall in " the crotch district " of the absorbent article core of this indication, the crotch point is positioned at crotch district longitudinal center.That is, the crotch district is by at first locating the crotch point of absorbent article core, measures 25% the distance forward and backward of absorbent article core length overall then and determines.

Refer to width in the absorbent article core crotch district, the narrowest width when just measuring at this used term " crotch is wide " at crotch point place.When this layer was made of a plurality of dispersive layers, the layer with minimum widith was the width of this layer, therefore was that the shelves of absorbent article core are wide.If the section of layer is intersecting (x-) direction, then Ceng width is definite by the width of the highest quantification area of section.

Refer to identifiable parts in the absorbent structure at this used term " multilamellar ", any structure that is called " layer " in fact can comprise the lamination or the assembly of several sheet materials of required types of material described herein or width of cloth sheet.Comprise term " multilamellar " and " stratification " at this used term " layer ".For the purposes of the present invention, be also to be understood that term " on " refer to absorbent article core near moisture absorption top flat and the layer faced with it; On the contrary, the term D score refer to absorbent article core near moisture absorption egative film and the layer faced with it.Should be noted that: various elements, multilamellar and structure according to absorbent device of the present invention can maybe needn't be general plane shape under naturalness, but can be moulding or make any required configuration.Though above described each regional segmentation of the product of the continuing to use longitudinal centre line of articles for use, further cut apart and to carry out along cross central line.Therefore, the zone of contiguous longitudinal centre line is called " center ", and should the zone outer routine zone (that is, towards the example of articles for use to the edge) is called " side zones ".

Exemplary embodiment according to absorbent device of the present invention is the form with diaper 20 of absorbent article core shown in Figure 1.Fig. 1 is in open and flat, the top plan view of the diaper 20 of (that is, removed the flexible contraction that causes) not under the contraction state, and it has top flat 22, egative film 24 and mark and makes 28 the absorbent article core between top flat 22 and the egative film 24 of being positioned at.It is transparent that top flat 22 is shown, thereby absorbent article core 28 is shown preferably.

Also as can be seen from Fig. 1, diaper 20 has front waist region 32, back waist region 34, crotch district 36 and periphery 38, and peripheral outward flange by egative film 24 limits, and has the end limit of the longitudinal edge and the mark work 42 of mark work 40.The longitudinal axis of diaper 20 is arranged essentially parallel to longitudinal edge 40 and stretches, and be depicted as longitudinal centre line 67 (corresponding to y to or length); And transverse axis be arranged essentially parallel to the end limit 42, and be depicted as cross central line 66 (corresponding to x to or width).Lumbar region 32 and 34 constitutes the top of diaper 20, centers on waist when wearing.Articles for use crotch district 36 is the parts between the lumbar region 32 and 34 of diaper 20, and constitutes being positioned between wearer's both legs when wearing and covering the part of wearer's lower body of diaper 20.Therefore, crotch district 36 defines the sedimentary zone of liquids in general of diaper 20 or other disposable absorbent articles.

Top flat 22 and egative film 24 can be linked together, and preferably only are linked together at periphery.Included following configuration at this used term " connection ": make top flat 22 directly be attached to configuration on the egative film 24 on the egative film by top flat directly is fixed to; By top flat is fixed on the middleware, and being fixed on the egative film, middleware make top flat directly be attached to configuration on the egative film.Preferably, top flat 22 and egative film 24 are directly fixing each other by the coupling arrangement (not shown), coupling arrangement such as binding agent or any other coupling arrangement as known in the art.As shown in Figure 1, the dimensional configuration of top flat 22 is slightly smaller than egative film 24.Yet top flat 22 can all have identical dimensional configuration (that is, coextending) with egative film 24, combines at the periphery 38 of diaper 20.The size of egative film 24 is partly by the size of absorbent article core 28 and selected accurate diaper structure and determine.In the embodiment shown in fig. 1, egative film 24 has the hourglass shape configuration.Yet other configurations also are suitable as rectangle, 1 shape etc.

Although not shown, diaper 20 also can have the elastic component that applies contractility on diaper, thereby its structure is pressed close to comfortable more for the wearer.These elastic components can be assembled into the multiple configuration of knowing, such as roughly in the United States Patent (USP) of authorizing on January 14th, 1,975 3860003 (Buell), describe those, this patent is incorporated herein by reference.This elastic component can place near the periphery 38 of diaper 20, preferably be provided with along each longitudinal edge 40, thereby elastic component helps tractive diaper 20 and it is supported on wearer's the both legs.Another kind of scheme is, elastic component can be arranged on any or two in the end limit 42 of diaper 20 near, to form belt or belt and leg cuff.For example authorize people's such as Kievit United States Patent (USP) 4545595 referring on May 7th, 1985, this patent is incorporated herein by reference.Elastic component is fixed on the diaper 20 the contractile state of elasticity, does not therefore have in the constraint configuration normal, and these elastic components shrink efficiently or draw diaper 20 in.Elastic component can be fixed into the contractile state of elasticity with dual mode at least.For example, when diaper 20 was in not contraction state, elastic component can be stretched and fix.Perhaps, diaper 20 can (for example) shrink by pleating, elastic component be under the state lax or that do not stretch fixing and be connected on the diaper 20.Elastic component can extend the total length in the crotch district 36 of diaper 20 basically, perhaps can extend the total length of diaper 20, perhaps extends being suitable for forming on the random length of the collapsible lines of elasticity.The length of these elastic components is determined by diaper structure usually.

With reference to Fig. 1, absorbent article core 28 is painted work " l " shape.As implied above, before absorbent article core 28 comprises and back zone 52,54, and core crotch district 56.These zones limit at the crotch point of the core 28 of this explanation by determining basis.As mentioned above, crotch point is by determining with reference to wearer's anatomical structure.Only for illustrative purposes, the crotch point of core 28 is painted in Fig. 1 and is done 27.Crotch point 27 is plotted on the longitudinal centre line 67 that is positioned at diaper 20 and absorbent article core 28.This is common situation, and no matter the configuration of diaper and absorbent article core how.

Yet as directed, crotch point 27 is not positioned on the cross central line 66 in this specific embodiment, although in the structure of other diaper/cores it also can the position thereon.As mentioned above, in case determined the crotch point 27 of absorbent article core 28, the distance (paint and make horizontal line 63) of a core total length 25% by the distance (paint and make horizontal line 61) of measuring a core total length 25% from crotch point forward, and is measured backward by then following definite crotch district 56 from crotch point.In this diagram, the crotch district is the zone that is positioned at the core between horizontal line 61 and 63.As shown in Figure 1, absorbent article core 28 has proparea 52, back zone 54 and crotch district 56.And the crotch district 56 of core 28 is determined by crotch point position in the core.The crotch district of core can be used for limiting the corresponding crotch district of articles for use.

Top flat 22 is preferably submissive, soft-touch and non-stimulated to wearers skin.In addition, top flat is a transflective liquid, makes liquid (as, urine) penetrate its thickness at an easy rate.Suitable top flat can be used material manufacture widely, such as porous foam; Reticulated polymer foam; Apertured plastic films; Perhaps natural fiber (as, wood or cotton fiber) weave or the nonwoven web sheet, synthetic fibers (as, polyester or polypropylene fibre), the perhaps combination of natural fiber and synthetic fibers.Isolated for the liquid that wearers skin and absorbent article core is contained, top flat can be by the hydrophobic material manufacturing, top flat its at least one side handle with surfactant, make liquid see through its thickness easily.

At least a portion of top flat can stand mechanical stretching, so that " zero strain " stretch laminate that forms elastic side panels is provided.For realizing this, top flat is preferably tensile, be more preferably tractile, but need not to be elastomeric, thereby the permanent elongation that top flat will acquire a certain degree when mechanical stretching at least, thereby it can not reply its original configuration fully.Top flat can stand mechanical stretching, and top flat can excessively not break or tear, and preferred thus top flat has low across the machine direction yield strength of (laterally).

There is multiple production technology to be used to produce top flat.For example, top flat can be the nonwoven web sheet of fiber.When top flat comprised the nonwoven web sheet, width of cloth sheet can be for spunbond, carded, wet method shop is wadding, that melt and spray, water law is interlacing or the combination of said method.Preferred top flat is careless, and utilizes the device hot adhesion of knowing for the technical staff in the fabric field.Preferred top flat comprises the polypropylene fibre of the average fiber length with about 2.2 daniers.Refer to those at this used term " fiber of average fiber length " and have fiber at least about 15.9mm (0.625in) length.Preferably, top flat has about 18 to about 25g/m ²Quantitatively.Suitable top flat is made by Veratec.Inc, and product are called P-8, and the said firm is International Paper Company of Walpole, the branch company of Massachusetts.

Top flat 22 is positioned on the body surface of absorbent article core 28.In a preferred embodiment, obtaining material is positioned between absorbent article core 28 and the top flat 22.Top flat 22 can be attached on absorbent article core 28 and/or the egative film 24 by coupling arrangement (not shown) described herein.Suitable coupling arrangement is hereinafter at top flat 22 and/or egative film 24 being attached on the absorbent article core 28 and describe.Included following configuration at this used term " combination ": make this element directly be fixed to configuration on another element on another element by an element directly is fixed to; By an element is fixed on the intermediary element, and being fixed on another element, intermediary element make this element be fixed to configuration on another element indirectly.In the preferred embodiment of the present invention, top flat and egative film be in the directly combination each other of diaper periphery, and can combine according to the content indirection of instruction described herein.

Top flat can comprise disclosed structure carrier (structuredcarrier) material among the PCT bulletin WO99/25288 (Roe), and its disclosed content is incorporated herein by reference.Structure carrier is submissive, soft-touch and non-stimulated to wearers skin.In addition, structure carrier is a transflective liquid, makes liquid (as, urine) penetrate its thickness at an easy rate.Suitable structure carrier can be used material manufacture widely, such as porous foam; Reticulated polymer foam; Apertured plastic films; Perhaps natural fiber (as, wood or cotton fiber) weave or the nonwoven web sheet, synthetic fibers (as, polyester or polypropylene fibre), the perhaps combination of natural fiber and synthetic fibers.Preferably, isolated for the liquid that wearers skin and absorbent article core is contained, structure carrier can be by the hydrophobic material manufacturing.Perhaps, structure carrier usable surface activating agent is handled, and makes it to become hydrophobic.

Structure carrier preferably has a plurality of holes, and the effective aperture is at least 0.2 square millimeter; More preferably, the effective aperture in a plurality of holes is at least 0.5 square millimeter; Even more preferably, the effective aperture in a plurality of holes is at least 1.0 square millimeters; What choosing was arranged most is that a plurality of holes have the effective aperture that is at least 2.0 square millimeters.Effectively the hole is under those Image Acquisition parameters of describing in the PCT bulletin WO99/25288 that is quoted, has 18 or the hole of littler gray value when the standard grayscale grade of 0-255.

Structure carrier preferably has effective open area of at least 15%; More preferably structure carrier has effective open area of at least 20%; More preferably structure carrier has effective open area of at least 25%; Have most and select structure carrier to have effective open area of at least 30%.Carrier is configured in so that to receive the fecal matter aspect effective especially, in standing, describe as EP-A-0706546 run through top flat capacity (TransTopsheet Capacity) test the time, 0.2g/in at least is provided ²(1.3g/cm ²) run through the top flat capacity, this patent is incorporated herein by reference.

Egative film 24 is liquid-tight basically, is preferably made by plastic sheeting, although other flexible impenetrable liquid materials also can use.Refer to submissive and be easy to fit wearer's the global shape and the material of profile at this used term " flexible ".Egative film is used for preventing the article of absorbent article core absorbs and the effluent that holds is got wet touching diaper, as sheet and underwear.Therefore egative film can comprise woven or non-woven material, as the polymeric film of polyethylene or polyacrylic thermoplastic film or such as the composite of the non-woven material of thin film coated.Preferably, egative film is to have the thermoplastic film of about 0.012 (0.5mils) to the thickness of 0.051 (2.0mils).

In the particular embodiment of the present invention, at least a portion of egative film stands mechanical stretching, so that " zero strain " stretch laminate that forms the plastics lateral plate to be provided, and as need, the pretension egative film with elastic waist feature or any other elastic component superposed part.For this reason, egative film is preferably tensile, be more preferably tractile, but need not to be elastomeric, thereby the permanent elongation that egative film will acquire a certain degree when mechanical stretching at least, thereby it can not reply its original configuration fully.In a preferred embodiment, egative film can stand mechanical stretching, and egative film can excessively not break or tear.Preferred thus egative film according to the method consistent with ASTM D-638 measure across machine direction at least about 400% to about 700% final fracture elongation.Thus, the linear low density polyethylene that contains high level as the preferred polymeric film of egative film.Comprise the mixture that constitutes by about 45-90% linear low density polyethylene and about 10-55% polypropylene for the particularly preferred material of egative film.As the exemplary thin film of egative film of the present invention by Tredegar Industries, Inc.of Terre Haute, Indiana makes, product are called X-8323, are the RR8220 mixture for blown film, are the RR5475 mixture for plastic casting film.

Egative film 24 can embossing (usually, to approximately the thickness of 0.127mm (5.5mils)), and/or matt finishing is to form more the outward appearance like the cloth shape.In addition, egative film can allow steam to overflow (that is, breathable) from absorbent article core, and prevents that still effluent from passing through egative film.The example of saturating steam stock footage comprises microporous membrane, as from Exxon Chemical, and Texas, US buys, and product are called EXXAIRE ^Or lamination, monolithic membrane, as buying from Elf AtoChem, product are called PEEBAX, or buy from DuPont, product are called HYTREL ^, or buy from BF Goodrich, product are called ESTANE ^, perhaps lamination and non-woven laminate structure.

Egative film 24 is positioned near absorbent article core 28 lower surfaces.Perhaps, additional material (as, the additional material that obtains) can be placed between egative film 24 and the absorbent article core 28.Egative film 24 can pass through binding agent, preferably is fixed on absorbent article core 28 or any intervention material with following pattern.Perhaps, connecting mode can comprise hot adhesion, pressure bonding, ultrasonic bonding, dynamic mechanically bonding or any other suitable connecting mode, the perhaps combination of these connecting modes as known in the art.

Absorbent article core 28 can be included in for the baby or be grown up common such as can obtain under the condition of transfer rate or capacity, dispersion and/or retain liquid such as urine and other certain body exudates and any hygroscopic material of better fluid disposal ability can be provided, represent (particularly for urine) with forms such as the good property obtained, dispersibility and storages usually.

This performance can be obtained test and/or rewetting test such as the bending of describing among the PCT application IB99/00741 (acting on behalf of case CM-2060) by method evaluation as known in the art, and it is incorporated herein by reference.Content according to the disclosure, and according to method of testing described herein, preferred absorbent device presents the moisture absorption capacity of determining as whole articles for use vertical wicking test, wherein determined capacity for the segmentation that is positioned at away from the articles for use of the vertical dimension of articles for use broken line, 13.5cm at least 0.5 times of locating sectional absorptive capacity and be the sectional capacity in 0cm place, preferably at least 0.75 times, preferred 1.25 times, most preferably at least 2 times.

Suitable absorbent device can also be described by all thickness in crotch district, promptly (SCC) by saturated crotch district thickness (Saturated Crotch Caliper), actual hygrometric state crotch district thickness (Actual Wet CrotchCaliper) (AWCC), they obtain test method according to bending and determine, actual thus hygrometric state crotch district thickness is less than saturated crotch district thickness.

Obtain rewetting value (Post Curved Acquisition Rewet Value) less than about 180mg by showing the back bending, preferably less than 150mg, more preferably less than 90mg, articles for use preferably possess good rewetting performance.

Suitable absorbent device is also described by absorbent article core, actual hygrometric state crotch district thickness is less than actual hygrometric state lumbar region thickness, actual hygrometric state crotch district thickness obtains method of testing according to the bending of crotch point and determines, actual hygrometric state lumbar region thickness obtains method of testing according to bending to be determined, these articles for use obtain the rewetting value less than the back bending of about 180mg and possess good rewetting performance by showing.

Because in preferred design, the liquid storage district is positioned at away from liquid loading zone part, absorbent device or its each components list reveal the better fluid divergent function, and as described in detail in the PCT bulletin 98/43580, it is quoted at this especially.Content according to instruction, absorbent device comprises the absorbent article core with crotch district and at least one lumbar region, described thus crotch district has the final liquid storage ability lower than described at least one lumbar region, the crotch district also comprises high flow capacity liquid dispersion material, according to the vertical wicking test at this detailed description, this material has above 0.75g/cm ²The flow of the 12.4cm of/sec.

Though absorbent article core 28 plots " l " configuration in Fig. 1, Any shape can adopt.For example, absorbent article core 128 is shown in Figure 3 to be " hourglass shape " configuration, and wherein absorbent article core has mark at its longitudinal edge and makes 142 crossbow incision.In order to illustrate, crotch point mark does 127.(as mentioned above, the crotch point of absorbent article core is released from the wearer.) as shown, crotch point 127 is usually located on the longitudinal centre line 167 and x wire (although not being cross central line in this embodiment) 168 on.Put forward the distance of core total length 25% (paint and make x wire 161) and put backward the distance of core total length 25% (paint and make x wire 163) from crotch and determine by measuring from crotch in the crotch district.

Crotch district 156 is zones of the core between x wire 161 and 163.Except crotch district 156, core 128 has proparea 152 and back zone 154.When dry state and hygrometric state, absorbent article core is wide at the crotch of crotch point to be important for improved suitability is provided on the wearer.Preferred crotch is wide less, even also is like this when by the liquid moistening, thereby absorbent article core swells the degree minimum when wearer's both legs draw in.Aspect this, the absorbent article core of using among the present invention has when dry state or to be no more than the crotch of about 9cm alternatively when hygrometric state wide.Preferably, the wide and crotch when preferably also comprising hygrometric state of the crotch during dry state is wide to be no more than about 7cm, more preferably is no more than 5cm, even more preferably less than 3cm.The hygrometric state crotch is wide can to obtain thermometrically according to following bending.Since it with wear during the protuberance degree relevant, the wide crotch point place cross-sectional area than core of crotch is more meaningful.And aspect this, the narrow dimension of lateral dimension is considered to the wide layer of crotch.

Be appreciated that the uniform capacity of the wide reduction per unit of absorbent article core crotch surface area must reduce the capacity in quantity of material and liquid deposition district.Thereby reducing the crotch sector width is by increasing the essential capacity in the per unit surface area capacity maintenance crotch district with the existing trial that improves suitability.This prior art utilization accessory fibers in the crotch district absorbs liquid, adopts additional hydrogel forming polymer in order to liquid storage in some cases.Therefore these methods cause thicker absorbent article core, and particularly in the crotch district, the liquid that the present invention is tending towards being deposited in the crotch district shifts out this zone.It is reflected on the reduction value of liquid storage amount in the absorbent article core crotch district.So, in the preferred embodiment of the present invention, the crotch district of absorbent article core will comprise that function is with the material (one or more) of liquid dispersion away from the crotch district.Although liquid dispersion is a critical function of the crotch district material of core, within the scope of the present invention, can comprise in the crotch district that also major function is the material of the storage of liquid, short ofly exceed must value getting final product of storing in the crotch district.

A special aspect of the structure of hygienic article is functional and contradiction demand comfortableness.Therefore, the low capacity articles for use design to such an extent that to have ideal softness values easier than the articles for use with high wettability power as so-called " trousers pad ", have articles for use such as the baby diaper or the adult-incontinence articles of high wettability power.Equally, even adopt the articles for use that under the service condition that increases as pressure, also have special good fluid transmission property and liquid stand-up material to realize by the intrinsic stiffness that increases usually.

The notion of " pliability " presses for as everyone knows for the hygiene applications field, has the whole bag of tricks to obtain the objective pliability and the wearer comfort effect of the material of giving by physical characteristic.Most these idio-morphosis characteristics with concrete various materials are relevant, rather than relevant with whole articles for use itself.

Therefore, for most application scenarios, the pliability of articles for use can be evaluated and realizes by the low thickness of articles for use and/or wherein used liquid handling parts, but can not be used to have the articles for use of the thickness of increase, such as for having the articles for use that stricter liquid handling requires.

Thereby the principal focal point of prior art research and development is to guarantee that these material lists reveal good pliability, it has been determined that in this area that various mechanical schemes can influence pliability.

The objective evaluation of fabric quality carries out/measures on (KESF) being used for the Kawabata evaluation system of fabric (KawabataEvaluation System).Can buy weave machine and surface property on the market and measure the total system of usefulness.This equipment is designed to be used for measuring low stress stretching, bending, shearing and the lateral compression performance of fabric, and fabric face friction and surface character (referring to: S.Kawabata, " TheStandardization and Analysis of Hand Evaluation (the 2nd edition) ").Researched and developed about being called " basic feel value (Primary Hand Values) (PHV) " each parts processing of fabric of (stiffness, crimpness, crease-resistant pleat, smoothness and richness) and a series of form of presentations of weave machine and surface characteristic.Also researched and developed for " overall feel value (Total Hand Value) " the overall fabric treating rate (THV) that is called that derives from basic feel value.The KESF data are in order to analyze fabric.

Whether these tests can reflect comprehensively that all aspects of pliability are disclosed debate.Yet Kawabata series has hindered the mensuration of the multiclass articles for use relevant with the present invention for the restriction of material thickness.In view of these complexity, i.e. these 17 kinds of parameters are according to draft described herein or by solving the different drafts of similar performance, most researchers pay close attention to a few in these parameters.Therefore, a key property that has been identified is a bending resistance, such as testing (referring to the tappi test method in the TABER stiffness, T489om-92, revised in 1992) or the middle mensuration of GURLEY stiffness test (referring to tappi test method 543), two kinds of method of testings all are designed for paper at first, are used to the flexible material that approaches subsequently, as fabric, therefore has significant unfavorable limiting factor with respect to sample thickness.

Although these method of testings are being useful for estimating various independent materials in varying degrees, they obviously have limitation at the maximum ga(u)ge of material or in comprising than the articles for use of thick material.

To be used in material or the composite that has thicker degree in the absorbent device but still possess comfortable pliability during use in order better describing, to have been found that " distortion/bending " test is particularly useful.Articles for use or composite pliability and the evaluation of material pliability are separately carried out in parameter and the sectional performance combination of outfit that this test is relevant with majority thus.This method is considered all aspects of articles for use structure, and therefore is specially adapted to the high articles for use of liquid handling performance.

Key element is " torsional resistance " and (concurrent) flexural deformation in this test.

Thereby comfortable articles for use should show the specific resistance for the lateral compression distortion of torsional resistance, so that avoid articles for use excessively to swell.

Swell the mechanism of so-called distortion, wherein articles for use were out of shape between the operating period under the unsteered mode, formed the cord-like structure thus, had arbitrary shape, excessive thickness and the performance of deterioration.On the contrary, ideal mechanism be articles for use are made progress (that is, towards the wearer) be deformed into the bow shape.

In case after articles for use were deformed to a certain degree via controlled distortion opposing protuberance, it can be further with controllable mode distortion, the i.e. distortion of further crooked arcuate deformation.In this bending stage, material deformation defines the curved wire shaped of the reduction that initial representation exerts oneself.Therefore, for distortion subsequently, will be in the power that the initial shaping after strain articles for use of distortion are required less than the power of initial twisting and shaping.Therefore, articles for use can excessively not bear cross force under the situation of protuberance, but also will reduce the tendency that applies undesired pressure impression on wearer's body.

When using as hereinafter in greater detail during " distortion/distortion " method of testing, this test result will be a chart, draw out distortion/deflection and be used for the ratio of the corresponding force of given deformation/deflection.This curve will at least initially have " making progress " trend, that is, increase for distortion, and power also will increase.It can be the curve that increases " monotonously ", that is, from the mathematics aspect, the increase of the distortion corresponding increase of will having exerted all one's strength.This state comprises " strain " district of rule, in this zone, and when power discharges, (for example), distortion will be returned to starting point; But, in this zone, when tensile force discharges, can not be returned to original-shape for " moulding distortion " district.

The curve that such dullness increases can observe from traditional articles for use, particularly comprises not in this bonding when still they are stuck together into the width of cloth sheet of lamination configuration or synusia by traditional bonding technique (as, fur wood pulp) on one's body when these articles for use.

Yet for articles for use according to the present invention, the curve table that produces in the bending/distortion test reveals maximum, that is, in certain scope of distortion/deflection, the increment of deflection can not cause the increment of desired power, but can cause the reduction of power.From the mathematics aspect, this maximum can be zero representation in this scope with the first derivative of this curve, and the value of deflecting force is during less than this peak, and this derivative will be greater than zero; The value of deflecting force is during greater than this peak, and the value of this derivative is less than zero.

Particularly, have been found that these deformation characteristics are relevant with the crotch district, in the crotch district, must keep liquid handling mechanism; Deformation characteristic is also relevant with proparea or back zone, to set up and to keep good suitability.

Even it is soft and flexible should be noted that the single parts of structure, and has described distortion/crooked character, but the combination of these parts can cause rigidity obviously to increase, and for example just is more readily understood when considering (for example) corrugated cardboard.Wherein, the gluing stiffness that causes of several layers of flexible layer of paper obviously increases.Should be by not being that the material of undue " stiffening " or the combination of material are made according to articles for use of the present invention.This point must be satisfied under the situation of not sacrificing fluid handling properties.

Therefore, if articles for use are made by different materials, each must satisfy distortion/crooked requirement separately in these materials.Thus, these materials can show other Ideal Characteristics, as the compression flexibility (as, for certain foam).In case selected suitable material, material must be arranged to can not have a negative impact to flexibility.This point has relation especially for the crotch district of articles for use, wishes to realize the smaller size smaller of efficient liquid transmission and structure in the crotch district.In addition, this zone is subjected to the gather together effect of altitude of the compression stress that produced of both legs motions and both legs.Suppose to have these motions, preferably, this region list reveal by obtain in the distortion/crooked test with respect at least one lowest force in the front or rear articles for use district.

For example, the high flow capacity material can be arranged to the contiguous storage material, as long as other requirements are satisfied.In addition, material should not be combined into the structural pliability that compositions table is revealed can not make us accepting.

Particularly, have been found that the binding agent bonding (as hereinafter describing in detail) of each layer may produce main influence to pliability, and may with pliability from initially extremely softness reduce to extremely stiffening.For the present invention, it relates to the bonding between two or more layers." bonding " in the scope of the invention relates to permanent or temporary bonding (promptly/as, manufacturing and use between the moistening first).Realize that agglutinating straightforward procedure is with the compressing mutually than large tracts of land or its part area of two kinds of materials, as forming pattern.In addition, bonding can also be also two kinds of materials than large tracts of land on or realize by using binding agent or glue on its part area.

Of the present invention one special aspect, the bonding between two-layer is designed to the requirement of the good fluid intercommunication between two adjacently situated surfaces of balance, and does not produce excessive stiffness, such as by these two surfaces can be moved relative to each other, and does not have excessive friction.Therefore, this aspect of the present invention relates to special bond pattern, and the surface characteristic that relates to these pattern perimeters.

Permanent bonding is usually by adopting glue or binding agent to realize.And be well known that the application process of these binding agents, this method produces special bond pattern, and overall classification is: slot coated, the glue that is in line drip the glue sprinkling that the glue that (gule bead) or spiral glue drips drips applications, causes point-like or fibrous outward appearance.

For all application, given surface is capped entirely, perhaps binding agent may apply with the form of pattern.

Within the scope of the present invention, term " pattern " refers at least two sub regions on this given surface, they can apply by different binding agents and distinguish, apply, be with or without glue and spray, be with or without glue and drip and apply such as being with or without glue, or be different, but have obviously not commensurability or apply the glue of type with " not having glue ".

In the subregion that is applied with glue, the subregion whether glue can further be arranged, can consider the glue of point-like spraying is applied to different pattern and clearly explanation between adjacent glue spots, to have the subregion that does not have glue, yet should distinguish easily with the zone that does not apply any spraying glue in the zone.

Similarly, parallel, collinear glue drips and will have the specific band that does not have glue betwixt, yet, if two or more glue drip layout close to each other, and drip with two or more glue another form relation at interval, then in groups glue drips and will form a zone each other, and the space between two zones will form another zone.

Do not carry out the pattern that straight line applies if glue drips, but be applied to bending or cycloid the pattern situation of (for example for known " spiral type glue applies "), the width of this pattern will be limited by this diameter that rotatablely moves.In the situation that two spiral glue of arranging of being adjacent to each other drip, the configuration that can present overlapping, limit a successive zone with glue thus, (a regional helix is overlapping perhaps to limit two glue zones with different glue quantities, a zone does not have), perhaps helix can not have the zone of glue to separate by a zone that is applied with glue and one.

Have been found that gratifying binding agent by Century Adhesives, Inc.of Columbus, Ohio sells, the commercially available Century 5227 that does; And by H.B.Fuller Company of St.Paul, Minnesota sells, the commercially available HL-1258 that does.

This special aspect of the present invention relates to the concrete layout of these bond pattern, thereby keeps the pliability of composite high as far as possible, and need not sacrifice the function globality of the required articles for use of liquid handling.Although the performance of balance tradition articles for use is tended to globality and liquid usually, but the present invention provides a kind of articles for use at this aspect special, it does not bond on overall with, but mainly bond in the center, the side area does not have glue basically simultaneously, can allow two synusia to relatively move thus, and therefore low flexing resistance be arranged.

The center of absorbent structure or articles for use can limit by laterally measure the amount that equals the wideest part 25% of absorbent structure from longitudinal centre line on both direction.The remainder of absorbent structure or articles for use comprises side portion.

When comprising microparticle material, these materials should fully be fixed in the structure, to prevent confusion or to lose.Therefore, preferred at least 80%, more preferably surpass 95% the dry state granule when quantitative and when vibrational structure, be retained in this structure.Vibrational structure can manually be finished, such as by internal vibration in 30 seconds it 60 times, perhaps can be thus completed, that is, (be placed on traditional screening machine (as, Retsch Vibro VS1000) as the sample of 10cm * 10cm) and known granule content by having known size, than large-mesh (as, 14 orders, approximately 1.4mm opening) on, vibrate highly about 2mm.Shake the granule that and fall into suitable plate or plate weight, determine the particulate percent that keeps.

It is open that the another kind of method that production is used for structure of the present invention or parts is announced WO99/42067 people such as () McFall at PCT, the document has been described method incision or microgranular hygroscopic material that a kind of manufacturing is used for absorbent device, absorbent device such as sanitary towel, diaper, incontinence article or the like.This method can originally be carried out in the production process that need not cut miscellaneous part on one's body at another parts of absorbent device.In one embodiment, hygroscopic material places between two carrier web sheets, and stress is applied on the complex of hygroscopic material and carrier web sheet.Stress and the power that is caused are broken hygroscopic material, but only make the distortion of carrier web sheet, and what form granular materials between two carrier web sheets holds width of cloth sheet certainly.The absorbent structure that this method forms also is disclosed.In one embodiment, absorbent structure comprises the compound width of cloth sheet of the dispersive element of hygroscopic material.Compound width of cloth sheet comprises at least one carrier web sheet and a plurality of dispersive elements that become the hygroscopic material of oldered array on the carrier web sheet that are arranged in.In one embodiment, the dispersive element of hygroscopic material location adjacent one another are, between the dispersive element of hygroscopic material without any interval insulant.

Example 1

A kind of absorbent device comprises the absorbent article core that schematically is shown among Fig. 4 and Fig. 5, and Fig. 4 shows the view of the garment side of this absorbent article core; Fig. 5 shows the viewgraph of cross-section of this absorbent article core.The securing layer 701 of example 1 comprises the cellulose layer of chemicosolidifying.The securing layer 701 of example 1 has the longitudinal size of 260mm and the lateral dimension of 60mm.Securing layer 701 quantitatively be 340gsm, cause the about 5.3g of gross weight.Securing layer 701 is to be positioned at towards wearer surface synusia the most nearby.

Example 1 also comprises preceding storaging piece 704 that is arranged in front waist region 706 and the back storaging piece 708 that is positioned at back waist region 707.In the example 1,

storaging piece

704 and 708 be positioned at absorbent article core on the surface of egative film, and constitute by same type of

material.Storaging piece

704 and 708 comprises the hollow cavity shaped foam of polymers of the opening of the HIPE base that is designed for liquid storage.Preceding storaging piece 704 is essentially rectangle except the inward flange 710 that is shaped, inward flange has the length (longitudinal size) of width (lateral dimension) and the 188mm of 130mm.Back storaging piece 708 quantitatively be 160gsm, cause the about 3.8g of gross weight.

Example 1 also comprises discrete item 703, its be positioned at before and the

back storaging piece

704 and 708 on the wearer surface, and be positioned at storage/

rewetting block piece

705 and 709 on backsheet surface.According to the content of EP-A-0.810.078 instruction, handle to apply on the described width of cloth sheet twice except mechanical aftershaping, discrete item 703 comprises the chemically treated agglutinating fibrous width of cloth sheet of aftershaping.Discrete item 703 extends into back waist region 707 from front waist region 706 by crotch district 702.The lateral dimension that has 80mm in the moulding a little one-tenth pro-of discrete item 703 and back

waist region

706 and 707, and the lateral dimension that in crotch district 702, has 60mm.The longitudinal size of discrete item 703 is 438mm.Discrete item 703 quantitatively be 120gsm, cause the about 3.9g of gross weight.

Discrete item is bonded to by conventional binders and obtains/dispersion layer on, such as only applying binding agent by spiral glue applicator, that is, not be used in outside this center bonding laterally in the longitudinal center district.

Example 1 also comprises storage/

rewetting block piece

705 and 709, this block piece be positioned at discrete item 703 and forward and

backward storaging piece

704 and 708 on the wearer surface, and be positioned at obtain part 701 on backsheet surface.Storage/

rewetting block piece

705 and 709 comprises with binding agent and is bonded to superabsorbent material on all the other cored structures.The shape approximation of storage/rewetting block piece is in the shape of storaging piece 704 and 708.Storage/

rewetting block piece

705 and 709 have demarcation 300gsm quantitatively.This quantitatively causes the gross weight of 11g.

Example 2

Example 2 is the absorbent devices that comprise absorbent article core of the present invention, and it schematically is shown among Fig. 7 and Fig. 8, and Fig. 7 shows the view of the garment side of this absorbent article core; Fig. 8 shows the viewgraph of cross-section of this absorbent article core.The securing layer 701 of example 2 comprises that the cellulose fibre of chemicosolidifying and bicomponent fibre are respectively with the bonded synusia of 87% to 13% ratio.The securing layer 701 of example 2 has the longitudinal size of 260mm and the lateral dimension of 60mm.The quantitative of securing layer 701 is 340gsm, causes gross weight to be similar to 5.3g.Securing layer 701 is to be positioned at towards wearer surface synusia the most nearby.

Example 2 also comprises preceding storaging piece 704 that is arranged in front waist region 706 and the back storaging piece 708 that is positioned at back waist region 707.In the example 2,

storaging piece

material.Storaging piece

704 and 708 comprises the hollow cavity shaped foam of polymers of the opening of the HIPE base that is designed for liquid storage.Preceding storaging piece 704 is essentially rectangle except moulding inward flange 710, and inward flange has the length (longitudinal size) of width (lateral dimension) and the 110mm of 130mm.Storaging piece 704 quantitatively be 160gsm, cause gross weight to be similar to 2.1g.Back storaging piece 708 is essentially rectangle except moulding inward flange 710, and inward flange has the length (longitudinal size) of width (lateral dimension) and the 188mm of 130mm.Back storaging piece 708 quantitatively be 160gsm, cause the about 3.8g of gross weight.

Example 2 also comprises discrete item 703, its be positioned at before and the

back storaging piece

704 and 708 on the wearer surface, and be positioned at storage/

rewetting block piece

705 and 709 on backsheet surface.Discrete item 703 comprises by chemicosolidifying, reverses and filamentary structure that the fluffy fiber that curls, high surface area fiber and chemical bonding additive constitute.Discrete item 703 extends into back waist region 707 from front waist region 706 by crotch district 702.The lateral dimension that has 80mm in the moulding a little one-tenth pro-of discrete item 703 and back

waist region

706 and 707, and the lateral dimension that in crotch district 702, has 60mm.The longitudinal size of discrete item 703 is 438mm.Discrete item 703 quantitatively be 120gsm, cause the about 3.9grams of gross weight.Discrete item is bonded on storaging piece and the block piece by conventional binders, such as only applying binding agent in the longitudinal center district by spiral glue applicator, that is, not be used in outside this center bonding laterally.

Example 2 also comprises storage/

rewetting block piece

backward storaging piece

rewetting block piece

705 and 709 has the nominal basis weight of 300gsm.This quantitatively causes the gross weight of 11g.

Method of testing

Volume pliability method

This method is used to the structure measuring various materials and comprise these materials.Thereby this method can be used for evaluating each zone of articles for use, as proparea, back zone or the crotch district of articles for use.This method provides the dependency between volume pliability (BS) value (unit is power [N]) (y-axle) and the displacement (long measure [mm]) (x-axle), as being expressed as curve.Suitable structure according to articles for use of the present invention will show smooth, successive curve in useful spreading range, therefore determine the first derivative (d{BS}/ds) of this curve, be abbreviated as (BS ') (see figure 7) usually.

The distortion power that tester for elongation under this method employing compact model and specimen holder (Fig. 6 a and 6b) are measured sample.

Device

Tester for elongation: suitable tester for elongation is from Zwick Company of Ulm, and Germany buys, and is Zwick Material Tester type 144560.

Specimen holder: the specimen holder that is used for this test is shown in Fig. 6 a and 6b.As seen from it, (radius of curvature of the outer member of clamper is 59mm ± 1mm to sample holder, and arc length is 150mm at two curve rulers; The radius of curvature of inner member is 54mm ± 1mm, and arc length is 140mm) between, this plate has the wide protuberance that extends upward 20mm (front elements) and 55mm (posterior elements) of 30mm, thereby specimen holder can be inserted in the jaw of tester for elongation.This equipment design is used for testing the various material thicknesses of 1mm up to 10mm.As realized, this class specimen holder all is essential for the upper and lower jaw of tester for elongation.

Specimen preparation

Sample was under the controlled condition (50%RH, 25 ℃) at least two hours before test.

Sample is cut into 60mm * 150mm (each size of ± 2mm).The minor face of sample should be orientated consistent (that is, if material has short size and long size in using, print should cut into and make that the minor face of sample is identical with relative edge in the integral material so) with the material that is used in the finished product with long limit.

Crotch district sample should be from articles for use upper edge longitudinal centre line intercepting, its orientation make specimen length 75mm with respect to crotch point forward, and the 75mm of specimen length is with respect to crotch point backwards.Before or after district's sample also longitudinally centrage obtain, the long sample of 150mm longitudinally centrage absorbent structure end or back absorbent structure end are measured in the past respectively.Preceding and back sample can extend to the crotch district of absorbent structure partly.

The preparation of device

1. calibrate tester for elongation (one-tenth compact model) according to the description of manufacturer.

2. compression speed is set at 200mm/min.The crosshead halt is set to 30mm.

3. sample being inserted in the specimen holder, is 7mm ± 1mm for the degree of depth of each chuck group.

4. the jaw with tester for elongation separates, thereby the not bound part of sample is smooth and not distortion.It is corresponding to the space of the 46mm between the specimen holder upper and lower.

Operation and data acquisition

1. sample/specimen holder assembly is inserted in the jaw of tester for elongation.

2. under compact model, operate tester for elongation, write down the power/compression curve of each sample.

3. write down the distortion power of each sample.Distortion power is to make the required power of the initial distortion of sample.On the force compresses curve before comparatively constant power plateau visible initial spike power, and the power plateau is measure (bending force) of sample flexing resistance.

For the test each structure, at least to 5 sample repeating step 1-3, and the report distortion power meansigma methods and standard deviation.

Determining of curve and deviation

Fig. 2 shows the device that is used for determining articles for use crotch point and its absorbent article core.With reference to Fig. 2, the wearer's who stands both legs are plotted cross section 301 and 302.Successive material 303 (as, cord or rubber strip) reverse once, place at some place of fully close wearer's lower limb around wearer's both legs, thereby the cross point 304 of material 303 can be extended on the articles for use in wearing.Determine the crotch point of articles for use core thus, determine the crotch district of core according to above-mentioned explanation.

Further test

Especially referring to asking IB99/00741 (inner case CM-2060) among the PCT, particularly for the following method that in its Test Methods section, describes in detail:

The synthetic urine solution prescription

Crooked acquisition methods

Collagen protein rewetting method is obtained in back bending

Absorbent article core capacity and absorbent article core crotch district capacity by tea-bag centrifugal force capacity test (TCC Test)

Method for measuring thickness

The capillarity absorption test

The vertical wicking test of whole articles for use

The vertical wicking test of dispersion

Claims

1. disposable absorbent article,

Described articles for use comprise in the crotch district that is arranged between the operating period of its expectation between wearer's both legs, and at least one petiolarea, at least in a described crotch district and a petiolarea part, described articles for use comprise first complex that is made of top flat, egative film and the absorbent structure between the two, at least described thus top flat and described egative film are bonded to one another

It is characterized in that,

Described first complex for described crotch district and petiolarea show the volume softness force BS} with respect to displacement the relation of s}, it can be expressed as mathematic curve, therefrom can determine derivative (d{BS}/ds)=(BS '),

Thus for described first complex, at least in a described district, at least one shift value (s ₀) locate, described derivative is zero,

For described shift value (s ₀), this complex shows the volume softness force value { BS (s less than 10N ₀), preferably less than 7.5N, be more preferably less than 5N.

2. absorbent device as claimed in claim 1 is characterized in that, for the null shift value of the derivative { BS (s of volume pliability curve ₀), the described volume softness values of described first complex ratio in the crotch district is low in petiolarea.

3. absorbent device as claimed in claim 1 or 2 is characterized in that, the volume softness values of the petiolarea of described first complex is less than about 5N, preferably less than 3N.

4. as each described absorbent device of claim 1 to 3, it is characterized in that described absorbent structure comprises the wicking layer.

5. absorbent device as claimed in claim 4 is characterized in that, described wicking layer has the volume softness values less than 3N, preferably less than 1N.

6. as claim 4 or 5 described absorbent devices, it is characterized in that described wicking layer is the fibrous width of cloth sheet of being handled by the aftershaping activating treatment method.

7. absorbent device as claimed in claim 6 is characterized in that, described aftershaping activating treatment method is twice (double pass) activation.

8. each described absorbent device of claim as described above is characterized in that, described absorbent structure comprises and obtains the district.

9. absorbent device as claimed in claim 6 is characterized in that, the described district that obtains comprises and showing less than 3N, preferably less than the material of the volume softness values of 1N.

10. each described absorbent device of claim as described above is characterized in that described absorbent structure comprises the second lamination moisture absorption complex with at least one supporting course, and this supporting course comprises and can absorb liquid and be attached to granule on the described supporting course.

11. absorbent device as claimed in claim 10 is characterized in that, described granule is selected from the group of being made up of superabsorbent gelatin polymer, polymeric foamed materials and compositions thereof.

12., it is characterized in that as claim 10 or 11 described absorbent devices, comprise that the described particulate described second lamination moisture absorption complex is discontinuous, have at least two complex zones that vertically separate.

13. as each described absorbent device of claim 10 to 12, it is characterized in that, comprise that the moisture absorption complex of described particulate described second lamination is positioned at least one petiolarea of described articles for use.

14. as each described absorbent device of claim 10 to 13, it is characterized in that, comprise that the moisture absorption complex of described particulate described second lamination is positioned at the articles for use Background Region.

15., it is characterized in that described supporting course is selected from the group of being made of thin paper, non-woven fleece, yarn fabric or foaming structure as each described absorbent device of claim 10 to 14.

16., it is characterized in that described granule is attached on the described supporting course by coupling arrangement as each described absorbent device of claim 10 to 15.

17. absorbent device as claimed in claim 16 is characterized in that, described coupling arrangement is to melt and spray hot-melt adhesive.

18., it is characterized in that described granulopectic degree is that dry state is quantitative at least about 80%, preferably at least about 95% as each described absorbent device of claim 10 to 17.

19., it is characterized in that granule is quantitatively greater than 100g/m as each described absorbent device of claim 10 to 18 ², be preferably greater than 300g/m ², more preferably greater than 500g/m ²

20. each described absorbent device of claim is characterized in that described absorbent structure possesses the moisture absorption capacity as described above, thereby described crotch district has final moisture absorption capacity, it is less than 55% of total final moisture absorption capacity of described absorbent structure.

21. each described absorbent device of claim is characterized in that as described above, described articles for use have the crotch point in described crotch district, are positioned at final moisture absorption capacity that described crotch puts position backward thus greater than 60% of the final storage capacity of total articles for use.

22. each described absorbent device of claim is characterized in that as described above,

Described absorbent structure has two centers of aliging on described each side of articles for use longitudinal centre line, outward extending width reaches the wideest part 25% of absorbent structure from the center for outside two side zones with being positioned at described corresponding center side direction, each described side zones;

Described absorbent structure comprises into the two-layer at least hygroscopic material of contact relation, therefore defines common contact surface district;

Described thus two synusia are bonded to one another by the adhering device that covers the adhering device area, and it is long-pending less than common contact surface, thereby at least 75% adhering device area is arranged in the central core zone.

23. absorbent device as claimed in claim 22 is characterized in that, described adhering device is a hot-melt adhesive.