CN1286611A - Non-Unitary absorbent articles - Google Patents

Abstract

The present invention relates to absorbent articles comprising an absorbent element and a fixation garment so as to achieve or maintain a convexo-concave shape of the absorbent core in the aborbent element with an upwardly bulged (i.e. towards the wearer during use) center crotch part, and outwardly bulged parts at the longitudinal ends of the absorbent element following the body curvature to surround the waist.

Description

Non-Unitary absorbent articles

Technical field

The present invention relates to sanitary absorbent article, be specifically related to be used to hold the absorbent device of relatively large discharge liquor of body (for example urine and/or excrement), for example adult-incontinence articles or baby diaper, and more specifically relate to non-Unitary absorbent articles, for example the articles for use of forming by absorption piece that separates and fixed part (for example underwear).

Background technology/prior art

The absorbent device that is applied in the health field is widely known by the people in prior art.This articles for use comprise absorption component and fixture usually at least, and the former is used for holding and keeping here body excretions, and the latter is used for the absorption component and the health opening of discharging corresponding body excretions are kept aliging.

A kind of articles for use as known in the art are " integral type " articles for use, that is, absorption component and fixture form a product basically.This articles for use are widely used in the baby diaper field, and it has typical band structure, by allowing these articles for use to hold wearer's health and in use being fixed in the effect of playing fixture on the health thus.Other integral type articles for use are shorts type diapers, perhaps directly are fixed to the moisture absorption pad on wearer's the underwear, similarly be called as " pantiliner " as is well known or woman month through or the mild incontinence field in other liner.

The articles for use of other kind are non-Unitaries, make absorption piece can separate with fixture.Known so-called " liner-underwear " system in the adult-incontinence field for example.

For all systems, all made the trial of attempting to improve these systems, particularly improve the performance persistent next to the shin of liner, that is, even under the situation of long time that wears and loading, all liner is held in place.

So far, some trials have been made at absorption piece or on fixed part.

For example, US-A-5,300,055 (Buell) discloses a kind of improved absorption piece that has, its have one raise up towards body surface, make whole articles for use or have " U of handstand " shape (that is, the opening surface of U-shaped is to the direction away from the wearer) or have " W " shape.A kind of similar articles for use have been described, by " W " shape structure that obtains as the global facility of these articles for use with flexible member in WO95/31165 (Olsen).

Disclose a kind of sanitary towel in WO95/17148 (Bergman), it has realized better contact between wearer's labia and articles for use, improve the disposal ability of fluid (that is menstruation).Similarly described a kind of sanitary towel among the WO88/04547 (Thoren), target is: by on MD and the CD both direction elastic element is affixed to top flat on a side away from wearer's direction, improve the contact between articles for use and the wearer.In addition, EP-A-0302,523 (Lassen) have described a kind of women's liner according to the anatomical structure abnormal shape, make by molding, mold pressing or other forming technique.

Other effort is intended to improve fixed system.

GB22 discloses some progress of prior art in 82,053, has wherein described a kind of underwear that can be used by the male, and these male are owing to reason medically need be dressed absorbent device at its groin place.The design of this underwear and being configured to: in use, the local liner of making by impermeable material and make absorbent device surround wearer's health tightly by underwear prevents moving of absorbent device simultaneously.This solution has certain effect, but still more such problems of existence, promptly stretch tight to such an extent that the wearer is felt under the weather, the crimping of underwear leg area can cause escape of liquid, and wearer's motion simultaneously may cause in groin and back part region generating slit.

GB2,185,678A discloses a kind of disposable underclothes, and it comprises an integral type moisture absorption pad, can be used as the mild incontinence underwear and uses.This moisture absorption pad from the crotch district simultaneously latter two zone of pro-extend up on the higher position of general moisture absorption pad of ratio.The design of this articles for use makes the escape of liquid when using night reach basically and minimizes.This structure may be because of moisture absorption pad by built-in and be in very high position and the wearer is felt under the weather.

US4,355,425 have described a kind of improved underwear and manufacture method thereof, and this underwear has non-woven porous fibre sheet and non-woven elastic component simultaneously.This underwear is characterised in that in all directions all have elasticity.But may appear at the problem of the aspect, location of Body contact and absorbent device.In addition, this underwear just designs for women and child use.

WO92/00051 discloses a kind of underwear, and it has a permanent elongation district, is placed with incontinence guard in this zone, and elastic properties of materials that should the zone is lower than the remainder of underwear.These features make incontinence guard correctly and easily to locate, and have improved wearer's confidence.Yet this structure can cause gathering in Background Region, can not guarantee Body contact closely.In addition, when incontinence guard was loaded, above-mentioned underwear can not cover incontinence guard effectively and may leak.

WO95/09594 relates to a kind of mild incontinence underwear, it is characterized in that having the elastic device that extends to the rear portion from the front portion of underwear.This elastic device may comprise elastica, bar or band, and they preferably are fixed on and constitute the two-layer of this underwear or between two.Yet this invention does not openly obtain elastic underwear by the one knitting technology.This underwear can occur that the wearer is uncomfortable such as causing, the belt place is lax and defective such as applying degree difference.

On March 18th, 1997 authorized the U.S. Pat 5,611,722 of Osborn and has described a kind of Briefs type underwear.This Briefs type underwear comprises anter, rear panel and crotch district.This underwear comprises that also one is the support chip of anchor shape basically, and it has the enhanced stretch resistance bigger than the other parts of underwear, and is knitted on the rear panel integratedly.This support chip be it is said the buccal that is used for promoting and separating wearer's buttocks.This support chip comprises a belt and along the upwardly extending portion that is bent upwards of the leg opening of underwear.Underwear although it is so can promote and separate the buccal of wearer's buttocks, and this underwear can not provide the lifting force that can improve the Body contact between sanpro and wearer's pudendum position.

Yet prior art is not recognized in concrete mode of the present invention the certain benefits that occurs after absorption piece and the fixed part combination.

Goal of the invention

Therefore one object of the present invention is, a kind of non-Unitary, the special absorbent device that is used for receiving a large amount of relatively discharge liquor of body (for example urine or feces) that designs are provided, make these articles for use can not produce undue discomfort, can not influence the performance of these articles for use nocuously the wearer.

Another object of the present invention is, a kind of articles for use that have the absorbability of extra improvement for feces are provided.

Another object of the present invention is, following design is provided, and it can be using that wearer's (can be him or she oneself, also can be that father and mother or nurse personnel wait other people) provides convenience when satisfying the demand.

Summary of the invention

The present invention relates to a kind of absorbent device, comprise absorption piece and fixing underwear, thereby realize or remain on a protruding concave shape of the absorbent cores in the absorption piece, described articles for use have one and raise up (promptly, in the use towards the wearer) middle crotch district and follow the outside bossing of health curve closely around waist in vertical end of absorption piece.

Brief description of drawings

Fig. 1 represents the moisture absorption pad as an example of absorption piece;

Fig. 2 a represents that pack according to the present invention becomes the articles for use of Ω shape;

Fig. 2 b represents to be used for the articles for use of the W collapsed shape of correlated prior art;

Fig. 3 is the front view of a preferred embodiment of underwear of the present invention;

Fig. 4 is the rearview of underwear shown in Figure 1;

Fig. 5 is with underwear shown in Figure 1 plane graph after latasuture is taken apart and elastic component evened up;

Fig. 6 is the rearview of another embodiment of underwear of the present invention;

Fig. 7 is the side view of another embodiment of underwear of the present invention;

Fig. 8 is the front view of underwear shown in Figure 7;

Fig. 9 is the front view of another embodiment of underwear of the present invention.

Detailed description of preferred embodiment

A kind of absorbent device generally includes:

--absorption component (be referred to as core or cored structure usually, it can be made up of minor structure);

--" main element ", for example

--liquid-tight egative film;

--optional other structure example such as packaged unit

--or flexible member.

In the context of the present specification, absorbent device can be " one " (that is, all elements links together), makes that these articles for use are a slice basically in use; Perhaps this absorbent device can be made up of the parts that separate, can comprise absorption piece such as absorption pad, with external stability parts such as the Telescopic Fixed underwear that can utilize again, for example, the mode of elasticity trousers that in adult-incontinence articles, often use and the combination of disposable absorbent pad.

In any situation, these articles for use or its each parts can disposablely maybe can be reused.Therefore, the term of Shi Yonging " disposable " vocabulary shows and does not plan to transporting that a little absorbent devices or parts wash or otherwise reclaiming or reuse (promptly as absorbent device or its parts herein, fortune kind of article will be dropped after using once, preferably reclaim, make fertilizer, or with mode environmentally compatible they are handled) with a kind of.

This absorbent device has one horizontal (x direction or width), and it is defined as the direction that is parallel to cross central line and aligns with the direction of wearer " from left to right " in use; One vertical (y direction or length), the short transverse when being defined as the direction that is parallel to longitudinal centre line and in use being in the standing place with the wearer is alignd; With one axial (z direction or thickness), be defined as the direction of the thickness extension of passing diaper 20.

In the context of the present invention, the curved portion of term " spill " expression one " to outer lug ", that is, for example when following the roughly curved portion of waist closely, the roughly concave curve part that will show around the belt of waist worn.Term " convex " relates to opposite curved portion.Certainly, these terms are relative, and " make progress " with term and " downward " (following usually the understanding to gravity) interrelates.Henceforth, letter " U " expression has " protruding " or recessed shape downwards.Greece capitalization Ω (Omega) represents a curved portion that has " raising up " at middle body.If use term " to be recessed into " and " projection " under the situation that does not have explanation " making progress " or " downwards " direction, then its implication is " making progress ".If use these terms, unless stated otherwise, suppose that all the wearer is in the position of standing with respect to wearer's position.

In Fig. 1 a, b and c, illustrate the present invention by the absorption piece of describing an absorbent device (it can be baby diaper or adult-incontinence liner).

This liner comprises an absorbent article core 10, is used for absorbing and holding fluid, mainly is moisture fluid for the basis in most applications.This absorbent article core 10 can be any moisture absorption apparatus, and is normally compressible, submissive and can absorb and keep main aqueous liquid.The example of suitable hygroscopic material comprises wood pulp, the crape fiberfill of pulverizing; Meltblown polymer; Chemicosolidifying, modification or cross-linked cellulosic; The thin paper that comprises thin paper bag and thin paper lamination; The moisture absorption foam; The moisture absorption sponge; The superabsorbent polymer; Sucting wet gel material; Or any suitable material or the combination of material.The profile of moisture absorption pad and structure also can change (for example, moisture absorption pad can have different thickness areas, hydrophilic gradient, the superabsorbent gradient is perhaps than low average density and less average quantitative reception area; Perhaps comprise one or more layers or minor structure).Preferably, this moisture absorption pad has a flat substantially profile, thereby avoids owing to having the complication that blocky three-dimensionally shaped structure produces.

The name that JIUYUE in 1986 was authorized people such as Weisman on the 9th is called the U.S. Pat 46,10,678 of " highdensity absorbent structure "; The name of authorizing people such as Weisman on June 16th, 1987 is called the U.S. Pat 46,73,402 of " absorbent structure with two layering cores "; The name that December in 1989 was authorized Angstadt on the 19th is called the U.S. Pat 4,888,231 of " absorbent article core with shop bisque "; The name of authorizing people such as Alemany on May 30th, 1989 is called the U.S. Pat 4,834,735 of " having low-density and low quantitative high density absorption piece ".The design of other moisture absorption pad has been described in european patent application No.933051500 and .93309614.1.

U.S. Patent No. 4,411,660 disclose the bilayer of being made by dissimilar hygroscopic materials have been arranged in a kind of absorbent product, make top layer get slowly than ground floor gel.

European patent specification EP-B-0,401,189 disclose the absorbent product with good characteristic, and product is to use two kinds of dissimilar sucting wet gel materials to realize in each layer, rather than use the mixture of two kinds of sucting wet gel materials to realize in a monolayer.

But can be used for aquogel type absorbent polymer among the present invention and comprise the multiple water insoluble basically but polymer of imbibition, it has the ability that absorbs big quantity of fluid.This polymeric material generally also is known as " hydrocolloid " or " super moisture absorption " material.The absorbent polymer of these aquogel types preferably has a large amount of anionic functional groups, as sulfonic acid and more typical carboxyl.Be suitable for using the example of polymer herein to comprise the polymer that those are got by the unsaturated acidiferous monomer preparation of polymerizable.Therefore, these monomers comprise and contain alkene unsaturated acids and the acid anhydride of at least one carbon to the two keys of carbon olefin.More specifically, these monomers can be selected from the unsaturated carbonic acid of alkene and anhydride, alkene unsaturated sulfonic acid and their mixture.

As mentioned above, the absorbent polymer of aquogel type preferably slight cross-linked network.Cross-linked network plays and makes the water-fast substantially effect of polymer, and has partly determined the content characteristic of the extractible polymer of wettability power and precursor granules and the final macrostructure that forms.No. 4076663 patent of the U.S. of quoting as proof previously and (Dahmen's) German patent DE-A-4020780 have described the preparation method of these cross-linked network polymer and cross-linked network agent commonly used in more detail.

In order to contrast the absorbent device with different final service conditions, perhaps the articles for use of different size have been found that " design capacity " is suitable means.

For example, the baby represents a typical colony that uses, even but in a fortune colony, the composition of its quantity of urinating, loading frequency, urine difference greatly all on the one hand from littler baby (neonate) to the child who has just learnt to walk, and equally also be like this for the Different Individual among the child that for example just learnt to walk.

Other uses colony can be child bigger, that still perplexed by incontinence to a certain degree.

In addition, the incontinence adult can use this articles for use, has the more condition of urinating of wide region again, is often referred to from light incontinence to serious incontinence.

Henceforth, the absorbent device that can satisfy these requirements should have the ability that absorbs a certain amount of urine, in order further to discuss described a certain amount of urine is referred to as " design capacity " (below will discuss in more detail).

The fluid of above-mentioned discharge capacity must finally be stored the absorbed of these discharge liquor of body (being moisture wherein at least), even make to have, also have only very small amount of liquid residue absorbent device on the surface of wearers skin." finally " speech represents that on the one hand absorbent device has been worn a kind of like this state of a very long time, represents that on the other hand hygroscopic materials has reached their " finally " capacity after reaching balance with the environment around it.Fortune both can be this class absorbent device residing actual user mode after having passed through wearing for a long time, also can be to a kind of state in the simple testing procedure that material or material component carried out.Because the many steps among considering all have asymptotic dynamic characteristic, when actual capacity reaches one during with the fully approaching value of asymptotic terminal point the certainty of measurement of instrument (for example with respect to), those skilled in the art can recognize at an easy rate and will reach " finally " capacity.

Owing to can comprise that some are mainly used in the material of final storage of liquids in the absorbent device, and some other is mainly used in realization such as receiving and/or the function of diffusion liquid one class but the material that also may have certain final storage capacity, so, when describing suitable absorbent article core material of the present invention, artificially these functions are not separated.However, still not only can determine the final memory capacity, the final memory capacity of hygroscopicity structure in some zones of final memory capacity, the absorbent article core of whole absorbent article core, perhaps even the final memory capacity of substructure, and can determine the memory capacity of the employed material of above-mentioned these elements.

Discuss at changing the articles for use size as top, those of skill in the art can use colony for other targets at an easy rate and adopt suitable design capacity.For example, the superabsorbent materials (this superabsorbent material has the moisture absorption capacity of about 31 milliliters/gram when carrying out known tea-bag centrifuge capacity test) that can comprise 9 grams for the adult-incontinence articles of using prepare for serious incontinent patients, and comprise that 97 grams have the plain air felt of traditional fibre of about 4 milliliters/gram volume, thereby obtain about 667 milliliters total final storage volume.Other examples relate to the articles for use that are used for the light incontinence patient.For example, have the ATTENDS MINI type of 70 milliliters final storage volume, 90 milliliters ATTENDS MINI PLUS type, perhaps about 167 milliliters ATTENDS NORMAL type, all these products are by Procter ﹠amp; Gamble company sells in many countries in Europe.

Again with reference to Fig. 1, described absorbent article core has the lumbar region 14,15 on the vertical limit 12,13 of next-door neighbour, and with the crotch district 11 that is connected these parts 14,15, this crotch district has a minimum widith " ò A ".As the example that provides among Fig. 1 a, the width of lumbar region 14,15 approximately is the twice of the width in crotch district 11.This absorbent article core 10 is connected with liquid-tight egative film 16.Egative film 16 can be by weaving or non-woven material, makes as the composite of non-woven material one class of the polymer thin film of polyethylene or polypropylene thermoplastic thin film one class or lining thin film.Usually, egative film is the thermoplastic film of a layer thickness between the extremely about 0.051mm (2.0mil) of about 0.012mm (0.5mil), for example can be from Tredegar lndustries Inc.of TerreHaute, blowing that RR8220 (blown film) that IN. produces and RR5475 (cast films) obtain or casting polyethylene (PE) thin film.Such egative film 16 has preferably passed through embossing and/or has not had optical processing so that have the outward appearance that more resembles cloth.

In addition, usually preferably, egative film 16 can allow vapour transmission itself can prevent again that liquid from seeing through from egative film 16.

The width of egative film 16 and length dimension be all greater than the size of absorbent article core 10, thereby form the neighboring.The part vertically stretching out the core outside of egative film 16 is referred to as empennage.

The widthwise edge 17,18 of the ratio broad of egative film 16 is inwardly folding, thereby to small part covering absorbent core 10.Vertically elastomeric element 21,22 (for example elastic webbing or bar) is contained on limit 19,20 freely.When absorbent device is pulled outwardly stretching, extension at ordinary times as shown in Figure 1, these elastomeric elements are stretched, and obtain better body fit so that in use can shrink.

Now widthwise edge 17,18 is in tubulose with folded portions not and arranges 23,24, thereby is connected with 27,28 of the inside widthwise edge 17,18 that folds respectively by its terminal tensile flexible member that is connected with end limit 25,26.

In use top flat 29 is positioned on wearer's absorbent article core 10.Top flat 29 is submissive, and is soft.And top flat 29 is that liquid can see through, and makes discharge liquor (for example urine) can see through its whole thickness easily.A variety of materials may be used to make suitable top flat, for example porous foam; Reticulated polymer foam; Plastic film; Perhaps by weaving or the nonwoven web sheet that the combined material of natural fiber (as the wood fiber or cotton fiber), synthetic fibers (as the polymer fiber of polyester, polyethylene fibre one class) or natural fiber and synthetic fibers is made.Can use multiple manufacturing process to produce top flat 29.For example, top flat 29 can by spunbond, make through combing, that soaked in the water, fibrous nonwoven webs that hydrogenation is tangled, combinations thereof or other similar materials.A kind of top flat of frequent use is to make (for example by Veratec lnc. with artificial polypropene staple through carded and heat bonding by means known in the field of textiles, a Division of International Paper Company, of Walpole, the product of the label P-8 that Massachusetts produces).

Top flat is attached on the whole or most surfaces of absorbent article core basically, perhaps can be above being bonded in partly.Top flat can be foraminous, makes ejection (for example urine or menstruation) permeate it easily.This top flat can also be all or part of flexible.

In order absorption piece to be remained on wearer's the health as mentioned above, and keep registration with the health opening of discharging bodily exudate, this absorbent device needs one or more fixtures.

Such fixture can be a mechanical type, promptly by utilizing frictional force between these articles for use and the wearer's skin or structural support force (for example and wearer's body contours such as hipbone coincide) can overcome the frictional force between gravity and/or this articles for use and the outer goods (for example wearer's coat and/or bedding) basically.

This absorption piece also can pass through traditional closed-system, and for example the whole tape subsystem that forms by the element by belt that scribbles binding agent or mechanical engagement remains in position, so that fix these articles for use or absorption piece around wearer's waist.

Therefore, this absorbent device or absorption piece have the closed-system that is made of band shape sheet clamp device and overlap joint element.Band shape sheet clamp device comprises set district and functional areas, and overlap joint element certain part of stiffener or egative film preferably.This functional part can adopt combination or other any devices well known by persons skilled in the art of multiple structure example such as bonding tightening member, mechanical tightening component, bonding tightening member and mechanical tightening component.

Hold the closed-system of wearer's waist for these, these articles for use preferably also comprise the elastomeric element that can be connected with these closing structures selectively, so that improve and keep the stickiness of these articles for use in the use.

Absorbent device (being referred to as " pant-like diaper " sometimes) is the integral type articles for use (promptly forming the structure of complete closed with the latasuture of sealing in the lumbar region) with pant-like design, form fixing as above-mentioned elasticity underwear thereby have elastomeric element simultaneously, also comprise absorbent article core (include application number that the underwear of elastic part submits on August 1st, 1996 and be in 96112413.8 the european patent application and further describe) in addition.

In addition, aforesaid absorption piece can have the device on the common underwear that is connected to user simplifiedly, and for example the device in being usually used in thin women's sanpro (for example being called " panty-liners ") is represented by fixture 30 in Fig. 1 c.

Another one distortion is to have the be adhesively fixed clamp device of type of top.Described at european patent application 9710666.91, the purpose of this " health is bonding " device is these articles for use directly are fixed on the wearer's skin.

Another one embodiment of the present invention relates to the non-Unitary articles for use, comprises absorption piece and independent fixture or underwear (for example netted or stretching underwear), and it both can be used as substitute and also can be attached on wearer's the conventional underwear and use.For a similar design of this non-Unitary parts are attachable belts of describing as among EP-A-0.409.307 people such as () Gipson.

In addition, can have several said fixing devices, for example both have the body adhesives that is administered on the absorption piece, have an additional tensioning member simultaneously or be in the underwear that the double fixed device is arranged according to absorbent device of the present invention.

In the design of non-Unitary, absorption piece and fixed part can be disposable, perhaps one of them or be (for example washing after) that can utilize again all.

The shape absorbent device of Ω-(Omega)

Except above-described structure, the following examples make the present invention be specially adapted to hold urine and/or feces ejection.

Primary with fundamental is, these articles for use be used for wearer and/or use form one at least in the crotch district (particularly at least in urine loading zone or position) produces the structure of raised bumps.The urine loading zone is usually located at, and promptly normally about forward 5 centimetres from the crotch point of these articles for use, corresponding to the narrowest width dimensions of the hard portion of these articles for use.

The device in the crotch district (specifically being the urine loading zone place of articles for use) by being arranged on articles for use can be realized this raised bumps, and in use the health of more closely pressing close to the wearer is compared with the transverse sides of absorption component in the location of the centrage of articles for use, and it is more approaching when being in flat pattern, make its position of center line compare more health with side thus, thereby this absorption component is in fact towards wearer's protuberance upwards near the wearer.

In Fig. 2 a, such absorbent article core 228 forms the shape (that is the mid portion of Ω (Omega)) that raises up.Ω (Omega) than lower part by main element, promptly mainly be that thin film and/or non-woven stock footage form.This structure is called as " Ω-protuberance ".

The absorbent article core of this Ω shape projection needs at least around the position that loads urine, preferably to the front and back of articles for use stretch out at least approximately+/-2.5 centimetres.For comfortable wearing, the crotch district core of this convex shaped should be transited into the preceding and back lumbar part of the articles for use with concave curve, so that center on wearer's waist well.

The elastomeric element that is used for making the side of articles for use and wearer's shank to keep in touch is positioned at the zone than lower part of Ω equally.

Compare with adopting the articles for use of " U " shape or W shape in the prior art, articles for use of the present invention provide special advantage; The slice cutaway view of articles for use 320 has been shown in Fig. 2 b, and it is clear has represented that whole absorption piece is with W formation type or folding.

Ω of the present invention (Omega) protuberance can form the pocket of vertical shaping in the outside of absorption component, and it in use can provide certain benefit.Because absorption component will locate to be loaded at its top " oncus " (230), its absorbing bodily ejection (because having only very little space to allow fluid to flow to other places) fully on the one hand; Secondly, even when using high performance material and structure, gravity helps fluid permeability to receiving in the material, thereby the time that fluid stops on the surface is reduced to minimum, makes and get wearer's skin wet or leak into the minimizing possibility of outside thus.

When having the cored structure combination of time good liquid handling performance, this advantage even become more remarkable.Even urine does not penetrate in the articles for use immediately when contacting with articles for use, it will be along the slope (i.e. the slope of this Ω (Omega)) " outflow " of the bossing that upwards is orientated.If core is being closed (may take place for performance or the relatively poor core of capacity) by the zone of being got wet (lastingly or momently) is full, the fluid that then can not penetrate in the core will be by the side interception of the liquid thoroughly of Ω (Omega), and this side keeps good sealing by the impermeable egative film of liquid (216) with respect to wearer's coat.

Can also see another advantage in Fig. 2 a and 2b, what represent among the figure is to have absorbed a certain amount of urine absorbent article core afterwards.Expand the back by approaching the expansible cores of border 240 and 242 expressions, and under the situation of traditional " W folds " core, urine will be full of the darker part of this W, and this almost forms a cup that is full of fully (particularly under the impact of wearer's motion).Particularly for the core of forming by the superabsorbent material, the superabsorbent material is tending towards reducing the Test Liquid Permeability of Core of the matrix that comprises these materials, owing to the restriction of how much expansions or owing to lack the transmission of fluid, will cause the expansion of W to be hindered than lower part (towards direction) away from the wearer to these parts.

Yet in situation of the present invention, this core only expands in the raised bumps of " Ω ", does not hinder reverse fluid transmission basically.

If with high performance core combination, the Ω protuberance for the function of fluid treatment change has taken place also: the requirement for transverse sealing now becomes inessential, " but Ω oncus " (230) provide flowing of CD direction, it increases the receiving velocity of liquid by increasing load-carrying area on the CD direction, and can also improving longitudinally significantly, fluid distributes.

In addition, when being loaded with feces in the articles for use, these feces can be deposited on these in the localized machine-direction oriented pocket of absorbent article core lateral outer side, thereby reserve the absorption component surface, are used for receiving further urine and load.Under the situation of the feces of rare relatively (perhaps mobile strong or than low viscosity), (for example when the wearer is in the position of standing owing to gravity) feces can further flow in the crotch district.Yet, have upwards projection and nonhygroscopic side seal herein, feces will be not can the covering absorbent core and can not destroy the performance that it receives urine.

In above-mentioned each situation, egative film (216) must stand these and load, and does not allow infiltration (also is like this even be designed to allow the situation of vapour transmission) under the normal condition of using.

Be understood that easily the pocket of these vertical sides need seal with respect to wearer's skin, for example realize by the elastic device (234) that is placed between egative film (216) and the top flat (236).

Within the scope of the invention, these pockets also can form by be referred to as " shank-closing in " that (for example EP-A-0,263,720 in) as known in the art is used for baby diaper.In a preferred embodiment of this " shank-closing in ", second upstanding part that closes up is located in lateral outer side from the fixed base of same closing in, thereby avoid these to close up, so that lower the ability of the urine that receives fast or even gush out repeatedly in the surface in alignment of absorbent article core.

Comprise a main body for a concrete preferred embodiment of the present invention, said pocket can be by folded inward and fixedly egative film and top sheet materials form, described egative film and top sheet materials have elastica (as at EP-A-0 on its longitudinal extension limit, describe among 098,512 (Beckestrom)).

Another key element of the present invention is that the raised bumps from the crotch district forms transition to the recessed protuberance of waist when wearing.

Known from the consideration of static state, similar arcual structure has certain structure intensity.This structural strength is the core main points of the present invention in the crotch district, and the protuberance that makes progress in the crotch district can produce such arcuate structure.As mentioned above, this raised bumps should be transformed into recessed structure at the waist of articles for use.By the folding round about scraps of paper can clearly be seen that wherein transitional region has tangible intensity and non-deformability in any one end to a direction is folding at the middle part.Based on context, " pocket " that this is in use formed, the perhaps void space between articles for use and wearer's health.

Such pocket has desirable effect, because feces can be stored in by in the void space that forms between Ω protuberance and the wearer, i.e. the part of the concave shape generation transition of the convex shape in the crotch district in the waist of the back upper place of articles for use produces one " rear portion colostomy bag ".This bag has a volume that is fit to be used for holding excrement, comprises from about 10cm ³To about 500cm ³Perhaps more.

This pocket also has advantage in the concrete articles for use design of distinguishing sex, promptly when such pocket be transition region by the front when forming, be space of male genital organ formation.

Such pocket also may be undesirable, for example preparing to be used for not planning when mild incontinence is used splendid attire feces, perhaps in the front region of the articles for use that aim at women's use, when particularly absorbent article core itself is very stiff (for example because highdensity fibre structure).

In all situations, not hope is in optional position, but has this transition on desirable position.Henceforth, a preferred embodiment of the present invention defines from the transition of convex to spill with " turning point ".

Relative size between projection, the recessed and transition region depends on the purposes and the wearer of expection.Yet usually the horizontal expansion minimum of these articles for use in the structural requirement use of human body preferably less than 7cm, more preferably is less than 5cm, and most preferred or even less than 4cm.Under the situation of W folded core, this size is 4 times of thickness of core, and under the situation of the core of Ω protuberance, it only is 2 times of thickness of core (ignoring under the condition with the thickness of the irrelevant material of core).In order to keep contact fully in drain site, the length in the zone of raised bumps should be at least about 5cm.This regional upper limit depends on the purposes of expection, can be from the minima of being a bit larger tham described 5cm (for example, for the women, urinary incontinence product) to about 20cm (also will be used for holding the articles for use of feces and needs " rear portion colostomy bag " for expection) variation.

Describing after how each key element of the present invention to interact with each other, providing the more detailed description of each single parts below.

Be used to form the device of persistent Ω (Omega) shape

At present, many absorbent devices are made flat pattern,, do not have special 3D shape that is.Use these articles for use people (that is, user he or she oneself, perhaps similar nursing staff such as caregiver, father and mother) can with difformity with discharge this articles for use by different use steps.

Promptly it is formed preferred Ω shape at least in the crotch district on one's body the time absorbent device being applied to the wearer, normal motion or loading itself can cause this Ω shape not keep fully significantly and/or fully for a long time in the use.Therefore, in order to keep this Ω shape, articles for use are provided with a device, be used for these articles for use are being administered in wearer's process on one's body, and the maintenance of strengthening Ω shape during use.

It can be any device that fortune is planted the device that is used to provide the Ω protuberance, and it can be out of shape or keep the distortion of absorption piece in the crotch district, makes in the process of using and the above-mentioned shape of formation between the operating period.

The simplest mode that realizes Ω shape in articles for use being applied to wearer's process on one's body is with folding these articles for use of appropriate shape by manufacturer.Thereby, the centrage that need extend longitudinally folds these articles for use, make this folded part top flat (in use preparing) towards the wearer outwards and egative film (prepare outward or towards wearer's clothes orientation) inwardly, this folded portions should comprise crotch district, particularly loading zone at least.Follow this folding, the people who uses these articles for use has the device of a Ω shape protuberance in being easy to realize using.

In addition, these articles for use can be folding in any way by manufacturer, but comprise a kind of device, manually produced this Ω shape or supported this Ω shape by the people who uses these articles for use before facing use.

Such device can be (when being in non-Ω shape structure) that is stretched and the elastomeric element that shrinks when using, thereby forms Ω shape, and perhaps it can be to be used for the egative film part device fixed to one another that each is corresponding.

An implementation method is, and is similar to the binding agent that uses in women's sanpro (for example being used for articles for use are fixed on so-called " the underwear fixed adhesive " of wearer's underwear), adopts bonder in a conventional manner simply.Yet in present case, target is that egative film is partly linked together and is not to be to be connected on the medicated clothing.

Can in manufacture process, apply this binding agent, use then for " underwear fixed adhesive " known separate paper to cover.In use, only combine and this separate paper is thrown off before forming Ω shape at each counterpart with egative film.Clearly, in first kind of situation, the packing of these articles for use and transportation are easier, and should be noted that in transportation in second kind of situation and do not destroy/damage its setting.

In addition, can in the manufacture process of articles for use, form this Ω shape.In this case, this bonder can be applied on it when articles for use are in flat and non-protuberance state, and then that each is corresponding egative film partly combines and produces this protuberance.

Another distortion of this Ω shape protuberance device is to utilize mechanical connecting device (for example being commonly referred to " mechanical tightening device "), make be added on the part first member (for example, by hook-forming) with second member (for example, by annular overlap) mechanical engagement.

The preferred distortion that the appropriate section of egative film is fixed together is: not by fixed mode, but by allowing backsheet surface can the slight movement mode to form relative to each other in the vertical.This relative motion has special benefit in wearer's motion (for example walking) process.Then, this Ω shape passage has " distortion " to a certain degree, but the function that can not lose it can not lost its whole Ω shape yet.

If these articles for use are prepared to be worn by movable people (for example movable, the ambulant adult or the child that learns to walk), because it has the comfort sense of increase in the process of walking, thereby particularly useful.

Such structure can be one or more elastic webbings or the bar (for example 240 expressions among Fig. 2 a) with contractility component of at least one CD direction.They can be connected to the widthwise edge (promptly to waist) of egative film rather than the mid portion (being the crotch district) of egative film, thus widthwise edge are moved to together, thereby are formed protuberance upwards or Ω protuberance.Though elastic device of the present invention do not need necessarily to be fixed on outer edge (promptly " Ω " by under base portion) on, but it should be noted that this articles for use setting, making only has being formed by absorbent article core by last bossing of Ω, rather than forms a complete W shape (promptly not having absorbent article core in the zone of flank 225).This can realize by the combination of core with certain degree of hardness and the structural rigidity that is obtained by protuberance.

This flexible member can be placed in the outside or the inside of egative film, but they should be placed in following (promptly away from wearer direction) of absorbent article core part, because otherwise to obtain the probability of U-shaped structure too big.

European patent EP-A-0 discloses the example of using of CD direction stretching structure in 652,175.

Another preferred version is that fixture is arranged on the position of leaving the egative film certain distance (for example by liner or block component), thus articles for use laterally vertically form between the left and right sides on limit one hinged.

In a further advantageous embodiment, not only egative film partly takes place to contact closely, and further whole absorption component is connected on its whole thickness.

Even this makes this shape also can keep better having under the service condition of pressure.

Bear the pressure in the use and become wet though this connection should have enough intensity, connection also should have enough flexibilities, thereby can not increase the uncomfortable of wearer.

Realize between the egative film, egative film and being used for keeps and the attachment device of lasting Ω protuberance between other method of connecting be other known technology, for example use glue, fusion connects and similar method.

In a particularly preferred embodiment aspect the breathable backsheet (for example non-woven material) be, pointwise ground effect hot-air, the specific part fusing with this structure links together thus.

In another embodiment of the present invention, can be kept the upwards convex (that is, Ω shape) of this absorption component by an independent device, this independent device produces a power that makes progress (that is, in use towards the wearer) in the crotch district.

In first embodiment, such lifting piece can be integrally formed in the integral type articles for use, for example this realizes that by laying flexible member in a side of absorption piece (in the use away from wearer direction) this flexible member has a component of contractility longitudinally that is positioned at articles for use.Thus; these parts should be arranged in crotch district and/or loading zone at least; also should be arranged in the longitudinal centre line zone, to such an extent as to promptly can not too far can not form Ω protuberance (if on a left side or right disalignment this can occur usually when being not less than 2.5cm) from this longitudinal centre line.

In second embodiment, such lifting piece also can be arranged in independent parts, and itself and absorbent article core parts (being moisture absorption pad) are not one or whole.This device can be an independent underwear (for example netted underwear) that wears on absorbent device.For one of this application preferred especially underwear is at the patent application Attorney of series application Docket, described in the CM1637Q.

This suitable underwear includes elastic belt, has the anter of first and second parts, has the rear panel of first and second parts, couple together between them and with anter and rear panel crotch district and a pair of resilient leg opening.The first of anter has the enhanced stretch resistance bigger than the second portion of anter in the horizontal.The first of rear panel has the enhanced stretch resistance bigger than the second portion of rear panel in the horizontal.The crotch district is provided with a longitudinal stretching control piece that is provided with along the longitudinal centre line of underwear.This longitudinal stretching control piece restriction crotch district stretching in vertically makes that the crotch district can adaptive wearer's skin surface.Stretching control piece and its extend to belt from the longitudinal stretching control piece before being provided with one in the anter.Be provided with an after-drawing control piece in the rear panel and it extends to belt from the longitudinal stretching control piece.

Suitable underwear although it is so can be made by the material with desired mechanical property as known in the art, but preferably knitting, make the knitting type by being used for particular elements and the combination of employed yarn obtain having the mechanical property of different components.In a concrete preferred embodiment, longitudinal stretching control piece and crotch district one are knitting, and preceding stretching control piece and anter one are knitting, and after-drawing control piece and rear panel one are knitting.

In addition, two or more above-mentioned parts can be combined in this absorbent device.For example, moisture absorption pad that can this underwear that preferably can stretch will fold in advance by (recited above) remains in the position.Perhaps, non-folding in advance pad can produce Ω shape structure by elastic component (this elastic component is in elongation state in the transportation of articles for use), and before using pad, just produce Ω shape structure, and this pad can be held in place by traditional stretched underwear (such as underwear), and do not need special member to keep this Ω shape, it is fixing on the throne perhaps can to support underwear by improved Ω shape.In addition, body adhesives also is suitable with the combination of the integral type articles for use that fold in advance, and these integral type articles for use have the elastic device that is used for forming the MD direction of lifting force on crotch district or loading zone.

Bend line

As explaining in the above, " male-female " transition should not be optionally to locate, and should appear on the desirable position.This can be by in these articles for use, particularly (if it is parts the hardest in these articles for use) be provided with " turning device " and realizes in absorbent article core.

There are not these attachment devices, this transition appears at the somewhere, the outside in crotch district usually, may be forwardly also may be in the rear portion, in these positions owing to lack the restriction of wearer's both legs, this Ω shape can be smooth, allow easier transition thus, this transition may still cause the reduction of deleterious distortion or structure.

Therefore it is evident that limiting from raised bumps will be very useful to the transition region of recessed protuberance, this qualification can realize by form bend line in absorbent structure.

Such bend line can form by the whole bag of tricks, for example cutting or mold pressing are (promptly, on whole hygroscopic piece, produce highdensity line, feasible easy curved edge) in these high-density lines, perhaps low-density line (for example, by articles for use being formed make but keep the zone of same thickness to produce simultaneously) by low quantitative material.

Promote the bend line of described convex-concave transition to extend to the longitudinal centre line direction from the outside vertically limit of core or the parts of definite articles for use hardness, promptly these bend lines should be designed to have horizontal orientation.These bend lines can be straight line or curve, thus the specific design of optimization articles for use and meet the physiological structure of target wearer colony.And the length of bend line can be selected at an easy rate.In addition, can use several independently lines in each transition region, perhaps a line can be divided into other several.Preferably, these bend lines do not run through the whole width of absorption component, and are because may cause the detrimental loss on the intensity or on the globality like this, particularly all the more so in concrete use.

Such bend line can pass through the whole bag of tricks, for example cutting or mold pressing are (promptly, go up the highdensity line of generation in whole rigid component (for example absorbent article core), edge in these high-density lines is crooked easily thus), perhaps the low-density line (for example, hang down the quantitative material district by in hard components, forming, and make its consistency be lower than high quantification area on every side) form.

The design capacity of absorption piece and final storage volume

In order to contrast the absorbent device of different final service conditions or different size, find that " design energy " is a suitable tolerance.

For example, the baby represents a typical use crowd, even but in this crowd, to the baby that learns to walk, the frequency of urine amount, load, the composition of urine are all different widely from young infant (neonate) for one side, and, for example in the different babies that respectively learns to walk, above-mentioned value also has nothing in common with each other.

Another use crowd is bigger child, still has the inconvenience of a definite form.

In addition, the adult of incontinence also can use this articles for use in the scope of broad loading condition, promptly from so-called light incontinence to serious incontinence.

Therefore, the articles for use that can satisfy this requirement should have the ability that absorbs above-mentioned amount of urine, and this is called " design capacity " in further discussing.

These amount of urine must finally be stored the absorbed of body fluid or at least the moisture of these materials partially absorb, thereby make the liquid (if any) have only minute quantity stay articles for use surface towards wearers skin." finally " speech refer on the one hand absorbent device long wear number of times the time state, refer to the hygroscopic material that with the surrounding balance time, reaches " termination capacity " on the other hand.This situation can be to be in absorbent device under the true user mode long after wearing number of times, perhaps also can be in the process of the test that is in simple material or material composition.Because many processes of being considered all have dynamic progressive nature, when the capacity of design for example reaches with respect to the measuring accuracy of equipment when being enough near progressive end points, those of ordinary skill in the art can think and reached " finally " capacity.

Because absorbent device can comprise the material that mainly is designed to final storage of liquids, the material that mainly is designed to finish other function (as receiving and/or dispersing liquid) but also can has certain final memory capacity, suitable core materials according to the present invention are to cut apart under the prerequisite of these functions at view not to be described with thinking.But, can for each zone of whole absorbent article core, absorbent article core, absorbent structure or or even substructure determine final memory capacity, also can determine the used material of aforementioned components.

When the present invention was used for the absorbent device of other different final uses, those of ordinary skill in the art can be easy to mine massively for other target end user and get suitable design.

In order to determine or estimate the final design stores energy of absorbent device, many methods have been proposed.

In narration of the present invention, the final memory capacity of supposing absorbent device is the summation of the final moisture absorption capacity of each element or material.For these independent elements, can use various mature technique, as long as can using in comparison process continuously, these technology just can.For example, the centrifugal capacity test of tea-bag of developing and setting up for the superabsorbent polymer can be used for the superabsorbent polymeric material, also can be used for other material (as above).

In case the capacity of each material is known, the capacity of total absorbent device can multiply each other and draws by transporting in a little values (milliliter/gram) and the absorbent device weight of used this middle material.

For special function is not the material (as receiving layer etc.) of the final storage of liquid, final stored energy can be ignored, this is in fact only to have low-down capability value owing to compare this material with the final liquid storage material of special use, perhaps this class material is not for loaded liquid, and they are discharged into liquid on other final storage medium.

By these qualifications, so-called " panty-liners " presents low-down several milliliters or final memory capacity still less.Sanitary pad's final memory capacity is generally about 20 milliliters, the final memory capacity of slight urinary incontinence articles for use is for example 75 milliliters or about 90 milliliters, the final memory capacity of medium urinary incontinence articles for use or young infant is about 165 milliliters, the final memory capacity of baby diaper of learning to walk reaches 300 milliliters or more, and the final memory capacity of serious incontinence article is 600 milliliters or more.

The centrifugal capacity test of tea-bag

What the centrifugal capacity test of tea-bag was measured is the centrifugal capability value of tea-bag, and it is an index weighing fluid preservation amount in the gel rubber material under the hydrostatic(al) mechanical pressure.

The superabsorbent material is placed in one " tea-bag ", it is immersed in the sodium chloride solution of a kind of 0.9% (weight), soaked 20 minutes, used centrifuge then centrifugal 3 minutes.The liquid weight of being preserved is exactly the absorptive capacity of superabsorbent material with the ratio of the initial weight of drying material.

The distilled water solution of the sodium chloride of 2 liter of 0.9% weight is poured in the tray that is of a size of 5 centimetres of 24 cm x, 30 cm x.The packed height of liquid should be about 3 centimetres.

The tea-bag parcel is of a size of 6.5 centimetres of 6.5 cm x, can buy from the Teekanne company of German Dusseldorf.The plastic bag sealing machine for kitchen use of an available standard (for example VACUPACK2 PLUS that is produced by German Krups) seals parcel.

, open it the tea-bag partial cut by carefully, weigh up its weight then.About 0.200 gram (being accurate to+/-0.005 gram) superabsorbent material sample is put into tea-bag.With heat sealing machine tea-bag is sealed then.This just is known as the sample tea-bag.

Seal an empty tea-bag again, with it as blank bag.

Each bag is held horizontally, and rocks the sample tea-bag then, thereby makes the superabsorbent material distribute more evenly in whole bag.Subsequently sample tea-bag and blank tea-bag are placed on the surface of saline solution, and are pressed in the solution, make its submergence 5 minutes (tea-bag can float on the surface of saline solution earlier, but subsequently can be moistening fully) fully with a spatula.Pick up counting immediately.

After soaking 20 minutes, sample tea-bag and blank tea-bag are taken out from saline solution, and put into a Bauknecht WS130, in Bosch 772 NZK096 or the similar centrifuge (diameter is 230 millimeters), make each pouch all paste the outer wall of centrifugal basket.The lid of centrifuge is covered, start centrifuge, speed is brought up to 1400 rev/mins rapidly.When the stabilization of speed of centrifuge during at 1400 rev/mins, the starting timer.After 3 minutes, centrifuge is stopped.

Sample tea-bag and blank tea-bag are taken out, weigh respectively.

Calculate the centrifugal capacity of tea-bag (TCC) of hygroscopic materials sample according to the methods below:

Sample tea-bag weight after TCC=[(is centrifugal)-(the blank tea-bag weight after centrifugal)-(weight of the hygroscopic materials of doing)] ÷ (weight of dried hygroscopic materials).

Be used for fixing the underwear of absorption piece

Be used for absorption piece is fixed on the correct position on wearer's the health and is used for realizing and/or keeping the main device that is in the Ω shape in the urine loading zone at least of these articles for use to be isolating underwears.

Therefore, can keep the shape that raises up (being Ω shape) of absorption component by an independent device, this device produces a power that makes progress (that is, in use towards the wearer) in the crotch district.

The summary description of underwear

Fig. 3 and 4 shows the front view and the rearview of incontinence undergarments 420 of the present invention.Shown in Fig. 3 and 4, underwear 420 of the present invention comprises an anter 430 with first 436 and second portion 438, rear panel 440 with first 446 and second portion 448, crotch district 450, a pair of leg opening 460 and belt 422 with flexible member with flexible member.Underwear 420 also has the waist opening 421 that a health that makes the wearer can enter into underwear 420.Underwear 420 further comprises the longitudinal stretching control piece 452 that is provided with along the longitudinal centre line in crotch district 450, be arranged in anter 430 and extend to the preceding stretching control piece 454 of belt 422, be arranged in rear panel 440 and extend to the after-drawing control piece 456 of belt 422 from longitudinal stretching control piece 452 from longitudinal stretching control piece 452.In these parts each all will provide more detailed description below.

Fig. 5 illustrates underwear 420 of the present invention and is in a kind of state that flattens fully, and its latasuture 432,434 has been opened, and flexible member is evened up.The plane graph (referring to following formation underwear) that can also regard Fig. 5 as a blank of underwear 420.As can see from Figure 5, underwear 420 has a longitudinal centre line L and a transverse centerline.As it can also be seen that from Fig. 5, underwear 420 of the present invention is symmetrical simultaneously with respect to the transverse centerline symmetry with respect to longitudinal centre line L.Underwear 420 also can be symmetrical and asymmetric with respect to transverse centerline with respect to longitudinal centre line L.

Underwear 420 can be made by woven, non-woven or knitting fabric.Underwear 420 is preferably made by a kind of knitting fabric.A kind of particularly preferred knitting means are, weave half the seamless tubular blank that a width is approximately the final width of underwear 420 earlier.The blank of this tubular can be made into hourglass shape, so that can form the leg opening 460 on the finished product underwear 420, perhaps also can be with the several portions excision of the barrel of opening forming this leg opening 460 (referring to following formation underwear).

Elastic waist belt

As mentioned above, waist opening 421 allows wearer's health can enter into underwear 420 of the present invention.Waist opening 421 preferably is equipped with the belt 422 that an elastic component is made, and makes can closely fit wearer's waist of this waist opening.The method that forms elastic waist belt 422 can be: two ends of contiguous brief blants are respectively installed an elastic component as Lycra  or SPANDEX material one class as shown in Figure 5, with two ends of this blank around himself being converted into C shape, form end limit 423 and 424, then these two ends are sewn on anter 430 and the rear panel 440, thereby form waist opening 421 and elastic waist belt 422.Preferably, elastic waist belt 422 have the yarn identical with anter 430 and rear panel 440 and with anter 430 and the knitting formation of rear panel 440 one.More preferably, elastic waist belt 422 comprises the welt of upset.Comprise for a particularly preferred knit pattern of elastic waist belt 422 and the combination of plain loop (plain knit stitches) and float needle coil (float knit stitches) wherein to be provided with a positive float needle coil every four ripples.

Anter

From Fig. 3 and Fig. 4 as can be seen, anter 430 is to combine around that part of wearer's waist and buttocks with rear panel 440 (back will be discussed) on the underwear 420.Can also see that from Fig. 3 and Fig. 4 anter 430, rear panel 440 and crotch district 450 also combine formation leg opening 460 (back will go through).Anter 430 comprises first 436 and second portion 438.

Simultaneously, can also use other structures, for example, anter 430 can be cut into suitable shape by woven, non-woven fabric and be connected with other parts of underwear 420.Anter 430 of the present invention preferably all adopts flat pin, more preferably knitting flat pin (jersey knit), and stretchable and non-resilient stretchable yarn is combined to form by elasticity.Those of ordinary skills can be clear, and the designer can utilize the elastic characteristic of single yarn and the mechanical performance that concrete knit pattern limits anter 430.In a special preferred embodiment of the present invention, anter 430 comprises all being that the nylon of flat pin (preferably knitting flat pin) and Lycra  or SPANDEX yarn (can be from Unifi, lnc.of Greensboro, NC buys) alternate coils line (courses).In another embodiment, anter 430 can be whole flat pins, and preferably knitting flat pin is all utilizing Lycra  or the SPANDEX yarn with suitable mechanical property in the row.Can be clear from the discussion of following mechanical property to anter 430, those of ordinary skill in the art can utilize other yarns to limit other knit patterns and obtain such mechanical property.As mentioned above, also can envision the anter 430 with this mechanical property is by weaving or non-woven material is made.

In the preferred embodiments of the present invention shown in Fig. 3 to 5, first 436 has the cross directional stretch resistance bigger than second portion 438.Preferably, first 436 also has the longitudinal stretching resistance bigger than second portion 438.The bigger elastic extension that second portion 438 has makes underwear 420 can be suitable for various builds and size, and can form good applying with wearer's health.The bigger enhanced stretch resistance of first 436 (particularly in horizontal direction) can be in the gamut of wearer's motion provides " Z a to " biasing force to absorption piece.This biasing force impels the absorption piece that together wears with underwear 420 to keep closely contacting with health.

Rear panel

As mentioned above, rear panel 440 is to combine around wearer's waist and that part of buttocks with anter 430 on the underwear 420.Rear panel 440 comprises first 446 and second portion 448.

Simultaneously can also use other structures, for example, rear panel 440 can be cut into suitable shape by woven, non-woven fabric and be connected with other parts of underwear 420.Rear panel 440 of the present invention preferably all adopts flat pin, more preferably knitting flat pin, the combination of and non-resilient stretchable yarn stretchable by elasticity and being made into.Those of ordinary skills can be clear, and the designer can utilize the elastic characteristic of single yarn and the mechanical performance that concrete knit pattern limits rear panel 440.In a special preferred embodiment of the present invention, rear panel 440 comprises the alternate coils line of (the preferably knitting flat pin) nylon of whole flat pins and Lycra  or SPANDEX yarn (can be from Unifi, Inc.of Greensboro, NC. buys).In another embodiment, rear panel 440 can all be flat pin (a preferably knitting flat pin), utilizes Lycra  or the braiding of SPANDEX yarn with suitable mechanical property in all coils line.Can be clear from the discussion of following mechanical property to rear panel 440, those of ordinary skill in the art can utilize other yarns, limit other knit patterns obtains such mechanical property.As mentioned above, also can envision the rear panel 440 with this mechanical property is by weaving or non-woven material is made.

In the preferred embodiments of the present invention shown in Fig. 3 to 5, first 446 has the cross directional stretch resistance bigger than second portion 448.Preferably, first 446 also has the longitudinal stretching resistance bigger than second portion 448.The bigger elastic extension that second portion 448 has makes underwear 420 can be suitable for various builds and size, and can form good applying with wearer's health.The bigger enhanced stretch resistance that first 446 has provides " Z a to " biasing force to absorption piece in the gamut of wearer motion.This biasing force impels the absorption piece that together wears with underwear 420 to keep closely contacting with health.

The crotch district

Crotch district 450 is along the longitudinal centre line L of underwear 420 of the present invention, between anter 430 and rear panel 440.In the preferred embodiments of the present invention shown in Fig. 3 to 5, crotch district 450 combines with anter 430 and rear panel 440 and forms leg opening 460.As shown in Figure 5, longitudinally centre line L is set with a longitudinal stretching control piece in crotch district 450.This crotch district cross-over connection the distance between elastic leg opening 460.

Simultaneously can also use other structures, for example, crotch district 450 can be cut into suitable shape by woven, non-woven fabric and be connected with other parts of underwear 420.Crotch of the present invention district 450 preferably all adopts flat pin, more preferably knitting flat pin, the combination of and non-resilient stretchable yarn stretchable by elasticity and being made into.Those of ordinary skills can be clear, and the designer can utilize the elastic characteristic of single yarn and the mechanical performance that concrete knit pattern limits crotch district 450.In a special preferred embodiment of the present invention, crotch district 450 comprises it all being the alternate coils line of the nylon of flat pin (preferably knitting flat pin) and Lycra (r) or SPANDEX yarn (can be from Unifi, Inc.of Greensboro, NC. buys).In another embodiment, crotch district 450 can all be flat pin (a preferably knitting flat pin), utilizes Lycra  or the SPANDEX yarn with suitable mechanical property in all coils line.Can be clear from the discussion of following mechanical property to crotch district 450, those of ordinary skill in the art can utilize other yarns to limit other knit patterns and obtain such mechanical property.As mentioned above, also can envision the crotch district 450 with this mechanical property is by weaving or non-woven material is made.

Preferably, crotch district 450 is made less than the knit materials of elastic leg opening 460 or longitudinal stretching control piece 452 by the longitudinal stretching modulus.More preferably be that shown in Fig. 3 to 5, crotch district 450 utilizes flat pin decorative pattern and have an elastomeric yarn and anter 430 and rear panel 440 knitting integratedly.

The longitudinal stretching control piece

As mentioned above, longitudinal stretching control piece 452 is used for limiting crotch district 450 stretching of centre line L longitudinally.Particularly, longitudinal stretching control piece 452 restriction crotch districts 450 stretching of centre line L on machine-direction oriented longitudinally.Yet needn't be limited with theory, the applicant believes that such longitudinal stretching restriction can pass to crotch district 450 from rear panel 440 with from anter 430 with " Z to " biasing force.Any absorption piece that the transmission of this power makes crotch district 450 and its go up to place can be securely fixed in the gamut that the wearer moves on wearer's the health longitudinal centre line L of underwear 420 (particularly along).

The applicant has been found that underwear 420 of the present invention is comfortable especially for the wearer, although this underwear closely with wearer's body fit with contact (particularly as discussed here in the crotch area).Underwear in the prior art and/or underwear are attempted by elasticity lifting member (for example sanitary pad), or realize adaptive with crotch region by all wrapping tightly.These underwears are described to uncomfortable usually.These uncomfortable reasons (particularly for health banding pattern underwear) are that the anus to the wearer has compressing.The perianal tissue can cause uncomfortable to oppressing responsive especially and affacting supra-anal power.Health banding pattern underwear (, describing in 551) for example in U.S. Pat 3,608 but use an elasticity tensile member that lifting force is provided usually, absorbent item is sealed in wearer's perineal position.This elastic component is connected on the underwear at the certain position place usually, and this position is positioned at above wearer's the anus when wearing underwear.As a result, not only there is a desirable lifting force that absorbent item is sealed on wearer's the perineum, and also has act on the wearer supra-anal to make us uncomfortable compressing.On the other hand, underwear 420 of the present invention provides " Z to " discussed above biasing force, makes to keep and Body contact in whole wearer's range of movement, does not act on wearer's supra-anal insupportable compressing simultaneously.

As the clearest demonstration among Fig. 5, longitudinally centre line L is provided with a longitudinal stretching control piece 452 in crotch district 450.Longitudinal stretching control piece 452 both can be that the separate part that is connected in the crotch district 450 also can become one with crotch district 450.Preferably, longitudinal stretching control piece 452 becomes one with crotch district 450.In a special preferred embodiment of the present invention, longitudinal stretching control piece 452 is knitting with crotch district 450 one.

As mentioned above, longitudinal stretching control piece 452 is used for limiting and stretches the particularly machine-direction oriented stretching of centre line L longitudinally in crotch district 450.For this reason, longitudinal stretching control piece 452 can be made greater than the fabric in crotch district 450 by any its stretch modulus.For example, longitudinal stretching control piece 452 can be by the high-modulus film material, perhaps in addition single-strand yarn or one filament with relative high modulus make.For the knitting longitudinal stretching control piece 452 of this preferred one, the longitudinal stretching control piece can be made by the yarn identical with the used yarn in crotch district, and the yarn of wherein making stretching control piece 452 is knitting with the tensile decorative pattern of known restriction in the prior art.For example, longitudinal stretching control piece 452 can comprise such decorative pattern, and wherein the alternate coils line is played (tucked) by pleat.In addition, can float and inweave elastomeric yarn to obtain having the longitudinal stretching control piece 452 of known additional enhanced stretch resistance in the prior art.

The yarn that is suitable for longitudinal stretching control piece 452 is identical with the combination that those are considered to be suitable for the yarn in crotch district 450 or yarn basically.

The longitudinal stretching resistance that longitudinal stretching control piece 452 has is greater than the longitudinal stretching resistance of the described first 436 of described anter 430.The longitudinal stretching resistance that longitudinal stretching control piece 452 has is greater than the longitudinal stretching resistance of the described first 446 of described rear panel 440.

Preceding stretching control piece

Before stretching control piece 454 and 452 combinations of longitudinal stretching control piece, provide " Z a to " biasing force along the longitudinal centre line L of underwear 420 (specifically being in the crotch district 450).This power helps to promote crotch district 450 (particularly being placed on longitudinal stretching control piece 452 wherein), makes any absorption piece that can be placed on it keep contacting closely with health.Particularly, stretching control piece 454 will be guided to belt 422 by the power that longitudinal stretching control piece 452 provides before the applicant believes, help promote crotch district 450 and keep contacting closely with health.

As mentioned above, preceding stretching control piece 454 helps to provide " Z to " biasing force of centre line L longitudinally.Thereby, preceding stretching control piece 454 preferably longitudinally centre line L be arranged in the anter 430.More preferably, preceding stretching control piece 454 is divided into two equal parts with the first 436 of anter 430.Preceding stretching control piece 454 longitudinally centre line L is connected on the anter 430.Preferably, preceding stretching control piece 454 becomes one with anter 430.In a special preferred embodiment shown in Fig. 3 to 5, preceding stretching control piece 454 is knitting with first's 436 one of anter 430.

For the ease of the guiding of power, the stretching of preceding stretching control piece 454 should be less than first and second parts 436,438 of anter 430.For obtaining so less stretching, preceding stretching control piece 454 can be higher than the material of anter 430 by stretch modulus, perhaps makes by the knit materials of the knit pattern of bigger enhanced stretch resistance that can provide as known in the art is provided.Be suitable for comprising high-modulus film material (for example mylar material), perhaps or even have the single-strand yarn or an one filament (for example, cotton thread, polyester or nylon) of relative high modulus as the material of the higher stretch modulus of preceding stretching control piece 454.Preferably, preceding stretching control piece 454 can be by making with the same yarn of first and second parts 436,438 that are applicable to anter 430, and use stretch knitting less than the knit pattern and the anter one of first and second parts 436,438.Just, stretching control piece 454 before above-mentioned first and second parts, 436,438 yarns of being discussed with respect to anter 430 are equally applicable to.Damask for a special preferred pin of preceding stretching control piece 454 and to be to use the stretching that known weave obtains reducing in the prior art.For example, have been found that tuck stitch (tuck stitches) decorative pattern is well suited for.

The after-drawing control piece

After-drawing control piece 456 and 452 combinations of longitudinal stretching control piece provide " Z a to " biasing force.This power helps to promote crotch district 450 (particularly being arranged on longitudinal stretching control piece 452 wherein), makes any absorption piece that is placed on it to keep contacting closely with health.Particularly, the applicant believes that after-drawing control piece 456 will be guided to belt 422 by the power that longitudinal stretching control piece 452 provides, and helps promote crotch district 450 to keep contacting closely with health.

As mentioned above, after-drawing control piece 456 helps to provide " Z a to " biasing force.After-drawing control piece 456 preferably in rear panel 440 along extending from longitudinal stretching control piece 452 with isolated two lines of longitudinal centre line L.By after-drawing control piece 456 is separated from longitudinal centre line L, being shifted from longitudinal centre line L more energetically of after-drawing control piece 456.The applicant finds this point particular importance, because it allows the first 446 of rear panel 440 to cover the anus location.Because first 446 all has the enhanced stretch resistance less than after-drawing control piece 456 in horizontal and vertical, this first can extend under less power.This zone with stretching, extension of low power forms a pocket 458 in rear panel 440, it can stretch and hold BM.

After-drawing control piece 456 can be connected on the rear panel 440.Preferably, after-drawing control piece 456 becomes one with rear panel 440.In a special preferred embodiment shown in Fig. 3 to 5, after-drawing control piece 456 is knitting with first's 446 one of rear panel 440.

For the ease of the guiding of power, the stretching of after-drawing control piece 456 should be less than the first 446 and the second portion 448 of rear panel 440.For obtaining this less stretching, after-drawing control piece 456 can be higher than the material of rear panel 440 by stretch modulus, perhaps makes by the knit materials of the knit pattern of bigger enhanced stretch resistance that can provide as known in the art is provided.Be suitable for comprising high-modulus film material (for example mylar material), perhaps or even have the single-strand yarn or an one filament (for example, cotton thread, polyester or nylon) of relative high modulus as the material of the higher stretch modulus of after-drawing control piece 456.Preferably, after-drawing control piece 456 is by making with the identical yarn of first 446 that is applicable to rear panel 440 and second portion 448, and use stretch knitting less than knit pattern and their one of first 446 and second portion 448.Just, the above-mentioned yarn of being discussed with respect to the first 446 and the second portion 448 of rear panel 440 is equally applicable to after-drawing control piece 456.Be to use for a particularly preferred knit pattern of after-drawing control piece 456 that known can providing reduces tensile weave in the prior art.For example, have been found that the tuck stitch decorative pattern is well suited for.

Leg opening with flexible member

Can see that from Fig. 3 to 5 underwear 420 of the present invention also has a pair of leg opening 460 that elastic component is housed.As mentioned above, anter 430, rear panel 440 and crotch district 450 combine the periphery that defines each leg opening 460.Be equipped with a leg elastic 462 on this periphery, make leg opening 460 have elasticity.Leg elastic 462 forms the sealing that can prevent that discharge liquor of body from leaking round the periphery of each leg opening.

Though leg elastic 462 must provide a minimized contractility, the periphery of helping to seal leg opening 460 prevents that discharge liquor of body from leaking, and importantly this contractility can not be greatly to causing that the wearer's is uncomfortable.In the cycle of wearing, on desirable elastic stretching scope, stretch modulus is minimized equally and wearer's possible sense of discomfort can be reduced to minimum.Just, if leg elastic is designed to provide a contractility in the concrete stretching of using, then no matter be because different wearers' leg configuration or because wearer's motion, this contractility should not be increased to bigger scope basically.

Can utilize means as known in the art, with leg elastic 462 round the periphery of leg opening 460 in anter 430, rear panel 440 and crotch district 450.Particularly, leg elastic 462 joins on the edge 425,426,427 and 428 of leg opening 460 (that is, forming its periphery).For example, can adopt the mechanical system of bonding mode or employing as stitching one class, leg elastic 462 is joined in anter 430, rear panel 440 and the crotch district 450.For preferred knitted underwear 420 of the present invention, preferably utilize the mode of sewing up that leg elastic 462 is joined in anter 430, rear panel 440 and the crotch district 450.

Form underwear

At first, the blank that utilizes means known in the prior art will be used for underwear 420 is made into tubular.Particularly, anter 430, rear panel 440 and crotch district 450 are that one is knitting.By form one knitting therein band and stretching control piece 454 before in the first 436 of anter 430, being provided with.By form one knitting therein band and an after-drawing control piece 456 is set in the first 446 of rear panel 440.Similarly, crotch district 450 has a longitudinal stretching control piece 452 that one is knitting.Used suitable knit pattern recited above.

Then with the blank of this tubular longitudinally (walewise) cut open and launch.Remove the excess stock that will fill up leg opening 460, form a blank of paving of underwear 420, the shape in the plane graph of its shape and underwear 420 shown in Figure 5 is similar.Also demonstrate among Fig. 5, the blank of this underwear has 425,426 and two back side edge 427,428 of 424, two front side edge of 423, one back end edge of a front end edge.

With leg elastic 462 along the periphery of leg opening 460 as discussed above to underwear 420.Then the blank of underwear 420 is folded up about transverse centerline, those two relative parts between leg opening 460 and end limit 423,424 on two sides are combined, form latasuture 432,434, the assembling of finishing underwear 420 thus (promptly, that part between the end of the leg elastic in anter 430 462 on the side 425 and the end limit 424 and the end of the leg elastic in rear panel 440 462 on the side 427 and the part between the end limit 423 are joined together formation latasuture 432.In the same way side 426 and side 428 are joined together and form latasuture 434).

Also have a kind of way to be, the some parts excision with the knitting blank of tubular forms leg opening 460.For example, the tubular blank can be flattened, its two inner surfacies are contacted each other, form a pair of machine-direction oriented side simultaneously.Can form the predecessor of leg opening then in the following manner: downcut compatible portion with the interval of standard from two horizontal opposed side edges with semicircle, half elliptic or other anticipated shape along the blank that is driven plain.Then with predetermined repeat pattern described below along transverse cuts this tubular blank that has flattened, form half-finished underwear, this predetermined repeat pattern is: transverse cuts for the first time, that part of material that will not cut away when forming the predecessor of leg opening forms the predecessor in crotch district along transversely cutting; Transverse cuts is for the second time carried out across the whole width of the tubular blank that has flattened, to form waist opening 421.Leg elastic 462 is placed and is bonded on these peripheries round the periphery of each leg opening 460.By once laterally making, two engaged at end that will form by transverse cuts for the first time together, thereby finish the making in crotch district 450.Elastic waist belt 422 is placed and elastic waist belt is joined on the described periphery along the periphery of waist opening 421, finish the making of underwear 420 thus.

Alternative

Referring now to Fig. 6,, provided the rearview of another embodiment of underwear 520 of the present invention.Except the structure of after-drawing control piece 556, underwear 520 is identical with underwear 420.

After-drawing control piece 556 and 552 combinations of longitudinal stretching control piece provide " Z a to " biasing force.This power helps to promote crotch district 550 (specifically being the longitudinal stretching control piece 552 that is placed on wherein), makes those absorption pieces that are placed on it and health keep contacting closely.Particularly, the applicant believes that after-drawing control piece 556 will be guided to belt 522 by the power that longitudinal stretching control piece 552 provides, and helps promote crotch district 550 and keeps contacting closely with health.

As mentioned above, after-drawing control piece 556 helps to provide " Z a to " biasing force.After-drawing control piece 556 preferably extends from longitudinal stretching control piece 552 along two camber lines from longitudinal centre line L interval along the part of its length, converges then, forms a line of centre line L longitudinally before arriving belt 522.By after-drawing control piece 556 is separated from longitudinal centre line L along the part on its length at least, and the higher power of after-drawing control piece 556 is moved away from longitudinal centre line L, produce bag 558.The applicant finds this point particular importance, because this design of underwear 520 covers the anus location with pocket 558.Because pocket 558 all has the enhanced stretch resistance less than after-drawing control piece 556 in horizontal and vertical, pocket 558 can extend under less power.Zone with low tensile force forms a pocket 558 in rear panel 540, can extend and hold BM.

After-drawing control piece 556 can be connected on the rear panel 540.Preferably, after-drawing control piece 556 becomes one with rear panel 540.In a special preferred embodiment shown in Figure 6, after-drawing control piece 556 is knitting with first's 546 one of rear panel 540.

For the ease of the guiding of power, the stretching of after-drawing control piece 556 should be less than the first 546 and the second portion 548 of rear panel 540.For obtaining so less stretching, after-drawing control piece 556 can perhaps be made by having the knit materials that is used to provide the knit pattern of bigger enhanced stretch resistance as known in the art by the material with the stretch modulus that is higher than rear panel 540.The material that is suitable for being used as the higher stretch modulus of after-drawing control piece 556 comprises high-modulus film material (for example mylar material), perhaps even have the single-strand yarn or an one filament (for example, cotton thread, polyester or nylon) of high relatively modulus.Preferably, after-drawing control piece 556 can be made by the yarn identical with the yarn of first 546 that is applicable to rear panel 540 and second portion 548, and use has less than tensile knit pattern and their one of first 546 and second portion 548 knitting.Just, the above-mentioned yarn of being discussed with respect to the first 546 and the second portion 548 of rear panel 540 is equally applicable to after-drawing control piece 556.Damask for one of after-drawing control piece 456 concrete preferred pin and to use weave known in the art that the stretching that reduces is provided.For example, have been found that the tuck stitch decorative pattern is well suited for.

Referring now to Fig. 7 and 8, demonstrate another preferred embodiment of underwear 620 of the present invention.Except having increased lateral plate 680, underwear 620 is identical with underwear 420.

Come as can be seen from Fig. 7 and Fig. 8, lateral plate 680 is that combining with anter 630 and rear panel 640 on the underwear 620 come around wearer's waist and those parts of buttocks.More specifically, lateral plate 680 be second portion 648 on the underwear 620 with the second portion 638 of anter 630 and rear panel 640 couple together that part of.

Simultaneously can also use other structures, for example, lateral plate 680 can be cut into suitable shape by woven, non-woven material, and be connected with the remainder of underwear.Lateral plate 680 preferably all adopts flat pin, more preferably knitting flat pin, and stretchable and non-resilient stretchable yarn is combined to form by elasticity.Those of ordinary skills can be clear, and the designer can utilize the elastic characteristic of single yarn and the mechanical performance that concrete knit pattern limits lateral plate 680.In a special preferred embodiment of the present invention, lateral plate 680 comprises it all being the alternate coils line of the nylon of flat pin (preferably knitting flat pin) and Lycra  or SPANDEX yarn (can be from Unifi, Inc.of Greensboro, NC. buys).In another embodiment, lateral plate 680 can all be flat pin (a preferably knitting flat pin), utilizes Lycra  or the SPANDEX yarn with suitable mechanical property in all coils line.Can be clear from the discussion of following mechanical property to lateral plate 680, those of ordinary skill in the art can utilize other yarns, limit other knit patterns obtains such mechanical property.As mentioned above, also can envision the lateral plate 680 with this mechanical property is by weaving or non-woven material is made.

In the embodiment shown in Fig. 7 and 8, lateral plate 680 laterally has the enhanced stretch resistance bigger than the second portion 648 of the second portion 638 of anter 630 and rear panel 640.Preferably, lateral plate 680 vertically has the enhanced stretch resistance bigger than the second portion 648 of the second portion 638 of anter 630 and rear panel 640.

In embodiment was shown, the first 636 of anter 630 had the enhanced stretch resistance bigger than lateral plate 680 in the horizontal.The first 646 of rear panel 640 has the enhanced stretch resistance bigger than lateral plate 680 in the horizontal.The first 636 of anter 630 has the enhanced stretch resistance bigger than lateral plate 680 in the vertical.The first 646 of rear panel 640 has the enhanced stretch resistance bigger than lateral plate 680 in the vertical.

In use, preferably because they provide less enhanced stretch resistance, second portion 638 and 648 at first stretches.If the power that wears increases, side 680 should stretch, and following by the tensile part of last generation on the underwear is first 636 and 646.Because first 636 and 646 is used for incontinence pad is remained in position, other parts ( second portion 638 and 648 and side 680) then provide body fit closely in advance simultaneously, and therefore this design is preferred.

Referring now to Fig. 4, shown a preferred embodiment of after-drawing control piece 456, it is 452 extensions along two lines at interval of the longitudinal centre line L from rear panel 440 from the longitudinal stretching control piece.A preceding stretching control piece 454 that has with after-drawing control piece 456 similar structures shown in Figure 4, promptly, before stretching control piece 454 along 452 extending from isolated two lines of longitudinal centre line L from the longitudinal stretching control piece, be advantageous for male's user: with the contiguous underwear of male genital organ in the zone of low power is provided.Similarly, preceding stretching control piece can with the structural similarity of the after-drawing control piece 556 shown in Fig. 6, for male genital organ provides a pocket, this part has the enhanced stretch resistance lower than stretching control piece.

Referring now to Fig. 9, provided another embodiment of underwear 720 of the present invention.The structure of the leg opening of making except elastic component 760, underwear 720 is identical with underwear 420.As can be seen from Figure 10 come, the leg opening 760 with elastic component is than more eminence excision of the leg opening with elastic component 460 shown in Fig. 3.Provide an opening bigger to the higher cutting of leg opening 760 than leg opening 460 with elastic component.In addition, total quantity of material of underwear 720 uses is less than underwear 420.

Be used for realizing and keeping other device of Ω (Omega) shape

At present, many absorbent devices are made flat pattern,, do not have special 3D shape that is.Discharge these articles for use people (that is, user he or she oneself, perhaps similar nursing staff such as caregiver, father and mother) can with difformity with use this articles for use by different step of applying.

Even when discharging absorbent device on one's body the wearer it is formed preferred Ω shape at least in the crotch district, normal motion or the loading of himself cause this Ω shape not keep fully significantly and/or fully for a long time in the use.Therefore, in order to keep this Ω shape, articles for use are provided with a device, be used for these articles for use are being administered in wearer's process on one's body, and the maintenance of strengthening Ω shape during use.

The device of this Ω of being used to provide protuberance can be any device, and it can be out of shape or keep the distortion of absorption piece in the crotch district, makes in the dispensing process and the above-mentioned shape of formation between the operating period.

The simplest mode that realizes Ω shape in the process that articles for use is administered to the wearer is with folding these articles for use of appropriate shape by manufacturer.Thereby, the centrage that need extend longitudinally folds these articles for use, make this folded part top flat (in use preparing) towards the wearer's outwards and egative film (outwards prepare or towards wearer's clothes) inwardly, this folded portions should comprise particularly loading zone of crotch district at least.Follow this folding, the people who uses these articles for use has the device of a Ω shape protuberance in being easy to realize using.

In addition, these articles for use can be folding in any way by manufacturer, but it comprises a device, and this device produces this Ω shape or supports this Ω shape when manually producing Ω shape by the people who uses these articles for use before using being close to.

Such device can be an elastomeric element, and it is stretched when being in non-Ω shape structure, and shrinks in use, thereby forms Ω shape, and perhaps it can be to be used for the device that corresponding egative film is fixed to one another.

A method that realizes this point is, and is similar to the binding agent that uses in women's sanpro (for example being used for articles for use are fixed on the what is called " underwear fixed adhesive " of wearer's underwear), applies bonding agent in a conventional manner simply.Yet in present case, target is not that egative film partly is connected on wearer's the clothes, but connects together.

Can in manufacture process, apply this binding agent, use then for " underwear fixed adhesive " known separate paper to cover.When using, the appropriate section with egative film combine form Ω shape before, this separate paper is thrown off.

In addition, can in the manufacture process of articles for use, form this Ω shape.In this case, this bonder can be applied on the articles for use when articles for use are in flat and non-protuberance state, the part of the egative film of correspondence is combined to produce this protuberance then.

Another distortion of this Ω shape protuberance device is to utilize mechanical connecting device (for example being commonly referred to " mechanical fastening device "), make be applied on the part first parts (for example, by hook-forming) with second parts (for example, the overlap of ring) mechanical engagement.

The preferred distortion that the appropriate section of egative film is fixed together is not by fixed mode, but allows the backsheet surface in the vertical relative to each other can slight movement.In wearer's motion (for example walking) process, this relative motion has certain benefit.Subsequently, this Ω shape passage has " distortion " to a certain degree, but can not lose its function or its whole Ω shape.

If this articles for use are prepared to be worn by movable people (for example motion, ambulant adult or the child that learns to walk), because it has the comfort sense of increase in the process of walking, and particularly useful.

Such structure can be one or more elastic webbings or the bar (for example 240 expressions among Fig. 2 a) with contractility component of at least one CD direction.They can be connected to the widthwise edge of egative film rather than the mid portion of egative film, thus widthwise edge are moved to together, thereby are formed protuberance upwards or Ω protuberance.Though elastic device of the present invention do not need necessarily to be fixed on outer end limit (promptly " Ω " by under base portion) on, but it should be noted that and these articles for use must be shaped to: only the bossing that leans at Ω is formed by absorbent article core, rather than forms a complete W shape (promptly not having absorbent article core in the zone of side 225).This can realize by the combination of core with certain degree of hardness and the structural rigidity that obtains from protuberance.

This flexible member can be placed in the outside or the inside of egative film, but they should be placed in following (promptly towards the direction away from the wearer) of absorbent article core part, because otherwise to obtain the probability of U-shaped structure too big.

The application of CD direction stretching structure is disclosed in CM586 (Festooning).

This elastomeric element can be substantially the CD direction, perhaps also can have the orientation of MD, for example when vertical limit of being connected more towards these parts, promptly towards waist.

Another preferred version is that fixture is arranged on position (for example realizing by liner or block component) away from the egative film certain distance, thereby forms a hinge between the horizontal left and right sides on vertical limit of articles for use.

In a further advantageous embodiment, not only egative film part can take place to contact closely, and further with whole absorbent article core or even absorption piece on its whole thickness, connect.Even this makes this shape can keep better having under the service condition of pressure.Bear the stress in the use and become wet though this connection should have enough intensity, can not increase the uncomfortable of wearer thereby this connection should have enough flexibilities.

Realize between the egative film, egative film and being used for keeps and the attachment device of lasting Ω protuberance between other method of connecting be other known technology, for example use glue, melting adhered and similar method.

A concrete preferred embodiment of the breathable backsheet of this paper (for example supatex fabric) is, applies hot-air to pointwise and thus the specific part fusing of this structure linked together, as described in european patent application.

The combinative structure of absorption piece and underwear

By the combination of several structures with by being adopted as the specially designed structure of each parts, the synergy of absorption piece and clamping underwear (they are designed to support each other in improved mode) will become more obvious.

In addition, two or more above-mentioned parts can be combined in this absorbent device.For example, can remain in the position by the moisture absorption pad that the underwear (recited above) that preferably can stretch will fold in advance.Perhaps, the elastic component of can be by a state that is in stretching, extension in transit and producing Ω shape structure when using forms Ω shape structure with folding in advance pad, this liner can remain in the position by traditional stretchable underwear (for example pull-on pant), and does not need specific being used for to keep the structure of this Ω shape; Perhaps the underwear that supports by an improved Ω shape keeps.In addition, body adhesives also is suitable with the combination of the integral type articles for use that fold in advance, and these integral type articles for use have the elastic device that is used for forming the MD direction of lifting force on crotch district or loading zone.

Similarly, no matter be underwear or absorption piece or both simultaneously, can have and be used for guaranteeing reliably the parts that are interconnected with one another.For example, moisture absorption pad is provided with the first that sticking altogether material is made, and the second portion that sticking altogether material is made can be set in the crotch district of underwear." sticky material " herein be a kind of preferential and himself is bonding and not with the material of other material adhesive.Authorize May 16 nineteen ninety-five in the U.S. Pat 5,415,650 of Sigl and described this affixed system, herein that the content of this patent is incorporated by reference.

In addition, can use " hook and ring " fastening system, wherein the underwear surface of absorption piece can be provided with hook material.For example, the fork of making according to the U.S. Pat 5,058,247 of authorizing people such as Thomas on October 22nd, 1991 (prong) will be a kind of gratifying hook material, and the content with this patent is incorporated herein by reference herein.The crotch district can be provided with ring material well known in the art, perhaps preferably, improves yarn and/or the knit pattern that is used for the crotch district according to prior art, obtains the ring with the engagement of hook material.

What can select is, adds labelling in the crotch district, so that help on the optimum position that the wearer is placed on it absorption piece.For example, this class labelling can comprise some labellings of centre line L longitudinally, when it makes the wearer a new absorption piece is placed on (that is, interior) the next to the shin surface in crotch district at every turn, this absorption piece can both be located reliably.In addition, can also on anter and rear panel, add labelling selectively, to help on the most preferably position that the wearer is placed on it absorption piece.

Method of testing

Stretch modulus and elastic contractile force

Purpose

The purpose of this method is to measure quantitatively and affact wearer on one's body power suitable power one with wearing in the process in the similar range of stretch of range of stretch that occurs usually of underwear by the retractable material that can be used in the underwear.

Method

The method of describing in INDA (non-woven fabric TIA) code test 110.1-92 is a kind of suitable method.Adopt following experimental condition:

Measurer length: 2 inches (5.08 centimetres)

Crosshead speed: 10 inch per minutes (25.4 centimeters/minute)

Cupping machine reaches the scope fit with the power of expecting, employing can be from Instron

The 5564 type testing machines that force cell: Corporation, Canton MA buy

And pick off is proper

Specimen width: 1 inch (2.54 centimetres).For width less than 1 inch (2.54 lis

Rice) sample, the width of first measuring samples is then according to 1 English

The ratio of very little/specimen width is adjusted the size of measured power

The sample direction: cutting longitudinal stretching modulus sample makes specimen width perpendicular to vertical

To direction.Cutting cross directional stretch modulus sample makes specimen width

Perpendicular to horizontal direction

Specimen size: at least three samples of every kind of measured material

Calculate

Power ₀: the power (gram/inch or gram per centimeter) during the beginning data acquisition, if having prestretched before the beginning image data.

Power ₂₅: percentage elongation is 25% o'clock a power (gram/inch or gram per centimeter)

Elastic contractile force=power ₂₅

Stretch modulus=(power ₂₅-Li ₀)/0.25

Calculate the meansigma methods and the standard deviation of elastic telescopic power (only to leg elastic) and stretch modulus.

All patents of being mentioned in this description, patent application (comprise any patent of authorizing subsequently, and any associated disclosed foreign patent application) and the disclosed content of public publication are all by incorporated by reference.But, obviously can not think any a teach literature that these are quoted as a reference or disclose the present invention.

Although showed and described several specific embodiment of the present invention, it will be readily apparent to those skilled in the art that and to make other various changes and improvements under the conditions without departing from the spirit and scope of the present invention.Claims will cover all these changes and improvements in the scope of the invention.

Claims (27)

1. absorbent device comprises: absorption piece and be used for the underwear of the described hygroscopic part of clamping, it is characterized in that described absorption piece has that the some parts that is at least described urine loading zone forms upwards towards the raised bumps shape of wearer's absorbent article core,

And wherein said underwear has the longitudinal stretching control piece, and the longitudinal centre line that described longitudinal stretching control piece is continued to use product is arranged in the urine loading zone with the raised bumps regional alignment at least.

2. absorbent device according to claim 1 is characterized in that,

Described underwear has

Article one, limit longitudinal centre line and a cross central line that limits horizontal direction of longitudinal direction, described underwear comprises:

Elastic waist belt;

Anter with first and second parts, described first has the cross directional stretch resistance bigger than described second portion;

Rear panel with first and second parts, described first has the cross directional stretch resistance bigger than described second portion;

The crotch district that between described anter and described rear panel and with both, is connected;

The a pair of leg opening of making by elastic component;

The longitudinal stretching control piece is arranged in the described crotch district along the described longitudinal centre line of underwear, and described longitudinal stretching control piece limits the described crotch district level of stretch of centrage in vertically longitudinally;

Preceding stretching control piece is arranged in described anter and extends to described belt from described longitudinal stretching control piece, thereby power is directed to described belt from described longitudinal stretching control piece; With

The after-drawing control piece is arranged in described rear panel and extends to described belt from described longitudinal stretching control piece, thereby power is directed to described belt from described longitudinal stretching control piece.

3. underwear according to claim 1 is characterized in that, the described first of described anter or rear panel has the longitudinal stretching resistance bigger than the described second portion of corresponding described anter or rear panel.

4. underwear according to claim 1 is characterized in that, described longitudinal stretching control piece has the longitudinal stretching resistance bigger than the corresponding first of described anter or described rear panel.

5. underwear according to claim 1, it is characterized in that, described first and second parts of described anter or rear panel have the longitudinal stretching modulus, and the described longitudinal stretching modulus of described first is greater than the described longitudinal stretching modulus of the described second portion of described anter or rear panel.

6. underwear according to claim 1, it is characterized in that, described first and second parts of described anter or rear panel have the cross directional stretch modulus, and the described cross directional stretch modulus of the described first of described anter or rear panel is greater than the described cross directional stretch modulus of described second portion.

7. underwear according to claim 1 is characterized in that described underwear is made by knit materials.

8. underwear according to claim 1 is characterized in that, also comprises the lateral plate that connects described anter and described rear panel.

9. underwear according to claim 8 is characterized in that, described lateral plate has the cross directional stretch resistance bigger than the described second portion of described anter or described rear panel.

10. underwear according to claim 8 is characterized in that, the described first of described anter or described rear panel has the cross directional stretch resistance bigger than described lateral plate.

11. absorbent device according to claim 1, it is characterized in that, at least the described raised bumps shape of urine loading zone obtains by following manner: the folding in advance absorbent article core of the longitudinal centre line of promptly continuing to use product at least in described urine loading zone makes at least some parts of egative film of covering absorbent core be in direct contact with one another.

12. absorbent device according to claim 1 is characterized in that, being used for the absorbent article core in crotch district is kept the described device of raised bumps shape is binding agent or the mechanical meshing device that is applied to from the outside on the absorption piece egative film.

13., it is characterized in that being used for the absorbent article core in crotch district is kept the described device of raised bumps shape is the contractile parts of elasticity according to any described absorbent device in claim 1 or 2, it has the force component of CD direction at least.

14. absorbent device according to claim 1 is characterized in that, it has length and width dimensions, and with all vertical z direction of above-mentioned both direction,

Also comprise with absorption piece being second device of one, be used for the absorbent article core at urine loading zone place is kept the raised bumps shape, it is contractile parts of elasticity and the force component that has the MD direction at least, in use can apply a force component towards wearer's z direction at least.

15., it is characterized in that it also comprises the one or more male-female transition apparatus between one or two lumbar region of urine loading zone and absorption piece according to each described absorbent device in the claim 1 to 14.

16. absorbent device according to claim 15 is characterized in that, described male-female transition apparatus is one or more bend lines.

17., it is characterized in that this urine loading zone is designed in application or keeps the raised bumps of the absorption piece of at least 50 millimeters long in the use according to each described absorbent device in the claim 1 to 16.

18. according to any one described absorbent device in the claim 1 to 17, it is characterized in that these articles for use also comprise the fixture that is applied to the adhesive type on the wearer's skin, be used for these articles for use are fixed on wearer's health.

19. according to the described absorbent device of aforementioned each claim, it is characterized in that, in the use have convex shape and have the urine loading zone of lumbar region of at least one concave shape and wearer's health between in use form the space.

20. absorbent device according to claim 1 is characterized in that, described absorption piece is in the same place by one or more fixtures are fixed to one another with described underwear.

21. absorbent device according to claim 20 is characterized in that, at least one described fixture is two bonding connections between the parts, is used for keeping being arranged at least the raised bumps of urine loading zone.

22. absorbent device according to claim 21 is characterized in that at least one described fixture is to be provided with along the longitudinal centre line of two parts.

23. absorbent device according to claim 24 is characterized in that, at least one described fixture is to be provided with along the longitudinal centre line of two parts.

24., it is characterized in that this absorbent article core has the design capacity that surpasses 70 milliliters of urines according to the described absorbent device of aforementioned each claim.

25., it is characterized in that this absorbent article core has the design capacity that surpasses 90 milliliters of urines according to the described absorbent device of aforementioned each claim.

26., it is characterized in that this absorbent article core has the design capacity that surpasses 165 milliliters of urines according to the described absorbent device of aforementioned each claim.

27., it is characterized in that this absorbent article core has the design capacity that surpasses 300 milliliters of urines according to the described absorbent device of aforementioned each claim.

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