CN1116018C

CN1116018C - Extensible absorbent article having less extensible barriers

Info

Publication number: CN1116018C
Application number: CN94102655A
Authority: CN
Inventors: T·W·奥斯本
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1993-07-22
Filing date: 1994-01-21
Publication date: 2003-07-30
Anticipated expiration: 2014-01-21
Also published as: MY112564A; CN1097589A; EG20368A; TW333036U

Abstract

The invention relates to absorption products, e. g. sanitary napkins, tight pant pads or incontinence pads. The invention in particular relates to an extractable absorption product such as sanitary napkin, which is provided with a smaller extension lip used as a block layer to block liquid flow.

Description

The extensible absorbing articles that less extension barrier layer is arranged

Technical field

The present invention relates to as diaper sanitary towel, the absorbing articles of panty lining and incontinence pad.More particularly, the present invention relates to the extendible absorbing articles as sanitary towel, it has the less extension lip as the effusive barrier function of barrier liquid.

Background technology

Normally be through the articles for use in underwear crotch district as the absorbing articles of sanitary towel, panty lining and incontinence pad.Other thing and avoid making dirty health and clothes that these articles for use were used to absorb and preserved liquid and discharge from human body.Although carrying out a lot of improvement aspect the material of absorbing articles and the structure two, yet improving the performance of absorbing articles, still particularly the improvement of the leaking performance of absorbing articles is difficult.

For example, the previous absorbing articles that uses has the elastic component of the side leaking performance that improves this product.For example, authorize on January 14th, 1975 in the United States Patent (USP) 3,860,003 of Buell and disclose the disposable absorbing articles made from elastic component, wherein, elastic component is set in place in the product side lappet between surface layer and backing layer.The side lappet is drawn in by elastic component, exists a ship shape and side lappet to form the barrier layer along the edge of product like this.

The name of authorizing Foreman is called the United States Patent (USP) 4 of " having the absorbing articles that keeps bag ", 738,677 disclose the effusive barrier layer of barrier liquid of another kind of type, and it has along first group of barrier layer flange of absorbing articles longitudinal edge and along second group of barrier layer flange on absorbing articles end limit.The barrier layer flange keeps bag at angle end overlap joint to form.First group of barrier layer flange has inter space device as an elastic component, and it separates two groups of barrier layer flange to receiving liquid surface ground away from absorbing articles.

Usually, the disposable absorbing articles of most of the above-mentioned types (that is, sanitary towel, panty lining and incontinence pad) is by can not making by tensile material.Just, put under the normal holding capacity effect of Shi Zaiqi when absorbing articles, material (and article self) will not stretch.Yet recently, for improve comfortableness and with the concordance of wearer's body and underwear (wearing type) if article are underwears, towards providing extensible absorbing articles direction to make many effort.PCT application publication number 93/01785 and its corresponding U. S. application number 07/915,133, both disclose extensible absorbing articles at the application case of application on July 23rd, 1992 (the application is their subsequent application) simultaneously.Yet, improve such absorbing articles The Characteristic Study and still continuing.

Particularly, need provide the energy barrier liquid effusive barrier layer to extensible absorbing articles such as sanitary towel.

Therefore, an object of the present invention is to provide a kind of extensible absorbing articles, as sanitary towel, it has the effusive barrier layer of barrier liquid.

Another object of the present invention provides a kind of extensible absorbing articles, and as sanitary towel, it has than the barrier layer that less percentage elongation is arranged in the sanitary towel, and it will transfer the commentaries on classics stand up position to from corresponding flat position when sanitary towel extends.

These and other objects of the present invention will with reference to below description and in conjunction with the accompanying drawings after more apparent.

The invention provides a kind of absorbing articles as sanitary towel.Sanitary towel of the present invention has some extensible parts at least.Has the effusive less extension of barrier liquid barrier layer in the sanitary towel.

Sanitary towel has first petiolarea, second petiolarea, the center between first and second petiolareas, and the limit, a pair of longitudinal side and the pair of end limit that form sanitary towel's periphery.In a preferred embodiment, sanitary towel has the center (for example, sanitary towel can be water leakage shape or 8 fonts) that is narrower than first and second petiolareas.Preferably include extensible sepage surface layer in the sanitary towel, link the non-sepage backing layer on the surface layer, the extensible absorbent core layer between surface layer and backing layer, and the non-sepage lip of less extension that plays the effusive barrier function of barrier liquid.In this preferred embodiment, lip comprises the fillet film, and it covers on surface layer along the limit, longitudinal side of sanitary towel, and each bar film all has inner edge, outside and pair of end portions.The ratio inner edge that the outside is set up will be away from the longitudinal centre line of sanitary towel, and the outside of bar film and end are fixed on the surface layer along the periphery of sanitary towel.The inner edge of bar film is not fixed on the surface layer between both ends.

If do not have tensile words in the sanitary towel then the bar film leans against on the surface layer flatly.When sanitary towel was stretched, the disconnected part of band transferred to than stand up position from flat position, and the bar film forms and inside lip (or lining ring) along the longitudinal edge of sanitary towel, and it plays the barrier function that barrier liquid flows through surface layer.The rise of bar film is because the fillet and the different cause of disconnected limit extensibility of barrier layer bar film.When being narrower than limit portion zone, the center in the sanitary towel make sanitary towel have water when leak forming 8 fonts, effect is significant especially, in a specific preferred embodiment, the bar film also can fixingly along the end limit of sanitary towel form the barrier layer with the whole periphery along sanitary towel similarly.

Description of drawings

Description be with particularly point out and required clearly to think that the claims that form theme of the present invention finish, will understand the present invention better in the description taken together with the accompanying drawings below the phase believer in a certain religion, wherein,

Fig. 1 is the top plan view of the preferred embodiment of sanitary towel of the present invention, and wherein the part of surface layer is cut so that following structure to be shown,

Fig. 2 is along the cutaway view of the sanitary towel that 2-2 line among Fig. 1 is cut open (be diagram, the size on barrier layer has been amplified widely),

Fig. 3 is the flat sheet of the bottom view in the sanitary towel shown in Figure 1,

Fig. 4 is the perspective view (only showing a barrier layer for simplicity) of sanitary towel after the sanitary towel shown in Fig. 1 is stretched,

Fig. 5 is the schematic sectional view of cutting open along sanitary towel's 5-5 line among Fig. 4 (showing the layout layer and two barrier layers on the throne of simplification),

Fig. 6 is the top plan view (unobstructed for simplicity layer) that sanitary towel's percentage elongation is shown,

Fig. 7 is a chart, has represented to be applied to the preferable relation between the corresponding with it sanitary towel of the tensile force size amount of tension in the sanitary towel.

The specific embodiment

Fig. 1-3 shows the preferred embodiment of disposable absorbing articles of the present invention.The present invention relates to as diaper, sanitary towel, the extending absorbing articles of panty lining and incontinence pad, it has the effusive barrier layer of barrier liquid.

In illustrated preferred embodiment, absorbing articles is a sanitary towel that usefulness 20 is represented, at the article of this term " sanitary towel " expression genital area that the women is close to dress, it be used for absorbing and hold various effluents from the human body discharge (as, blood, menstruation, and urine), yet, be to be understood that, the present invention is applicable to that also other feminine hygiene or menopad such as panty serve as a contrast, or other absorbing articles such as incontinence pad, and analog.

Sanitary towel 20 has two surfaces, the sepage surface of contact human body or the outer surface 20B of " contact surface " 20A and liquid-impermeable.Sanitary towel 20 shown in Fig. 1 is observed from the angle of its contact surface 20A.Contact surface 20A is near wearer's body.The outer surface 20B of the sanitary towel 20 shown in Fig. 2 is positioned at opposite side, and in dressing sanitary towel, it is placed near the underwear of wearer.

Sanitary towel 20 has two centrages that intersect at an I place, longitudinal centre line L and transverse centerline.Line, axis or direction in the sanitary towel of the term of Shi Yonging " vertically " expression herein 20 planes, it generally is divided equally into upright user when wearing sanitary towel 20 vertical plane consistent (for example approximately paralleling) of left and right halved body.Used term " laterally " or " level " are interchangeable, and expression is positioned at sanitary towel's 20 planar line, axis or directions longitudinally of being generally perpendicular to.

Sanitary towel 20 shown in Fig. 1 also has two isolated longitudinal edges (or " side "), 22 and two isolated horizontal or end limits (or " end ") 24, and they form the periphery (or periphery) 26 of sanitary towel 20 jointly.Sanitary towel's (or its main part) also has the zone, both ends, and they are represented as first end zone 28 and the second end zone 30.Central area 32 is arranged between end regions 28 and 30.32 the outward extending length in edge is about the 1/8-1/3 of main part length to

end regions

28 and 30 from the central area.The detailed description in central area 32 and both

ends zone

28 and 30 is seen the United States Patent (USP) 4,690,680 that JIUYUE in 1987 was granted Higgins on the 1st.

Sanitary towel 20 can have any thickness, comprises thicker, thinner, or even extremely thin.The embodiment of the shown sanitary towel 20 of accompanying drawing 1-3 is a kind of examples of thin sanitary towel, preferably a kind of " ultra-thin " sanitary towel.Yet, be to be understood that the multilayer material of seeing from these views can be felt sanitary towel 20 thicker than its reality.At the United States Patent (USP) 4,950,264 and 5,009 of Osborn, the thickness that " ultra-thin " sanitary towel 20 described in 653 preferably has less than about 3mm.Shown thin sanitary towel 20 is also preferably more softish so that the wearer is more comfortable.

Fig. 2 shows each parts of sanitary towel 20 of the present invention.Sanitary towel 20 shown in Fig. 2 generally comprises at least four kinds of basic elements of character.They comprise sepage surface layer 38, non-sepage backing layer 40, the absorbent cores 42 between surface layer 38 and backing layer 40 and along effusive at least one barrier layer of side 22 barrier liquids and the best a pair of barrier layer 44 of sanitary towel.Preferred embodiment shown in Fig. 1-3 also comprise one be arranged in the center 32 along with stretch bending (and preferably protuberance) to improve Body contact can less extension 216.The sanitary towel that adds the barrier layer on it can be one of disclosed international monopoly WO 93/01785 and 93/01786, and it is made of one or more extensible parts, particularly, it constitutes (except that can less extension) by extensible parts entirely, and it has whole extendability.

Fig. 6 shows the extendability of sanitary towel 20 with mode the most simply.Term " extendible " expression article at least one size on X-Y plane can increase as used herein.X-Y plane is generally the plane that is parallel to sanitary towel 20 surfaces.But the extendible article that comprise of term are stretchable and elastic stretching (being limited hereinafter).Sanitary towel 20 shown in Fig. 6 is preferably on length and the width all extensible.Yet in other embodiments, sanitary towel 20 can only extend on one of these directions.Preferably, sanitary towel 20 is extendible at least in the vertical.

In some preferred embodiments, sanitary towel 20 also can stretch except extending, and term " can stretch " and represent that article are extendible and some opposing stretching when tensile force is applied on the article as used herein.Be that sanitary towel 20 still can stretch the elasticity position better.Term " but elastic stretching " or " but elastic extension " are defined as synonym.These terms mean when tensile force is removed as used herein, and sanitary towel will restore towards its non-extension or non-stretching (or " original ") size.Yet sanitary towel 20 does not need all to reset on its non-stretching size.See Fig. 6, it will reset on its non-stretching size and the random size (as LR and WR) between extension size (or stretched dimension) Ls and the Ws.When removal makes the tensile power of sanitary towel, but the elastic stretching of sanitary towel will reduce (promptly vertically collection holds together) shunk by undesirable sanitary towel in vertically tendency, and when wearer's panty pursed up, this was ideal especially.

Sanitary towel 20 is preferably extendible as can be known in the total description of international monopoly WO 93/01785 and WO 93/01786.In order to summarize above-mentioned situation, in helping, be through under the power effect in the close-fitting pants of a cover sanitary towel, sanitary towel preferably can extend about 5% to less than about 50%, be better about 10% to 40% about between, be best about 25% to 40% about between.Be best, sanitary towel can extend under the power effect between to about the 100-1500g about 50-100g, is better extending under the power effect between to about the 800g about 250g.Other preferable elongation is shown in the table 1 (Fig. 7).Be to be understood that these determined all ultimate values and scope comprise all be in determined ultimate value and the scope than close limit, ultimate value and numerical value.Any other characteristics that also can have the sanitary towel described in the above-mentioned patent disclosure description in the sanitary towel of the present invention, the structure that comprises a kind of band " power wall " in the above-mentioned patent disclosure description, it is used for preventing to surpass the elongation of certain numerical value and does not in fact increase the power value that is applied in the sanitary towel.

Explain each parts of sanitary towel 20 of the present invention referring now to Fig. 1-3.

Surface layer 38 comprises one first sepage parts.When using sanitary towel 20, surface layer 38 nestles up the skin of user.For the skin of user, surface layer 38 is preferably submissive as much as possible, soft feel and non-stimulated.Surface layer 38 should further present good penetrance and a kind of probability of reducing rewetting, allow health emission rapid osmotic it and flow to sandwich layer 42, but do not allow these emissions to flow back on wearer's the skin through surface layer 38.

Surface layer 38 has both sides (or face or surface), comprises in the face of bodyside 38A with in the face of clothing side (in the face of the core side) 38B.Surface layer 38 usually form the zone of body contact surface (" the body surface ") 20A that is at least sanitary towel 20 in the face of bodyside 38A.Surface layer 38 has two vertical 38C of limit portion and limit, two ends 38D.

(similarly the figure notation system applies is to other parts of sanitary towel.That is, can represent with part numbers and Reference character " A " facing to the sidepiece of wearer's body.Represented side and hold the limit can be respectively to be represented with part numbers and Reference character " C " and " D " facing to the sidepiece available unit of wearer's underwear numeral and letter " B ".)

The surface layer 38 that is suitable for can be made by the material of wide region, that these materials are not limited to weave and non-woven material, they comprise the porous thermoplastic film of generation, plastic film, the thin film of hydroforming, perforated foams, reticulated foam, the plain cloth that weblike heat plastic films and thermoplasticity are lax.The weaving and the non-woven material that are suitable for can be by following fibrous, they be natural fiber (as, wood or cotton fiber), natural fiber (for example, the polymer fiber that synthesizes or improve, as polyester, polypropylene fibre, with polyethylene or polyvinyl alcohol, starch-based resin, polyurethanes, cellulose esters, nylon and staple fibre) or from the compositions of nature and synthetic fibers.When surface layer 38 comprised a nonwoven web, this net can be that the blowing of spunbond, combing, wet-laying, melt, that hydraulic pressure tangles, above-mentioned combination or similar fashion made.

Usually, porous membrane is preferably and is used on the surface layer 38, and this is because they can sepage, and if suitable hole is arranged, the tendency that can reduce liquid return and get wearer's skin again wet.The porous membrane that is suitable for discloses in following United States Patent (USP) of authorizing, and they are United States Patent (USP)s 3,929 that December in 1975 was authorized Thompson on the 30th, 135, authorize the United States Patent (USP) 4,324 of Mullane etc. April 13 nineteen eighty-two, 426, authorize the United States Patent (USP) 4,342 of Radel etc. August 13 nineteen eighty-two, authorized the United States Patent (USP) 4,463 of Ahr etc. on July 31st, 314,1984,045, and on April 9th, 1991 authorize the United States Patent (USP) 5,008,394 of Bairol.

It is extendible that surface layer 38 can become it as the mode at pleating on the surface material, wrinkling or roll extrusion ring grain with generation fold on surface layer by machined, this fold can launch when surface layer stretches, and such processing method can be carried out on above-mentioned many surface materials.In a preferred embodiment of the present invention, surface layer 38 is by according to United States Patent (USP) 4,463,045 make and the roll extrusion ring grain so that it has the longitudinal extension rate.Such surface layer August 25 in 1992 by John J.Curro, wait application, Application No. is 07/936,195, name is called in the application of " have the deformed area so that in fact fabric increases elastic polymeric fabrics " and is disclosed.

The suitable processing method that is used for roll extrusion ring grain or " giving wrinkling " is disclosed at following United States Patent (USP), they are United States Patent (USP)s 4 of authorizing Sisson on August 15th, 1978,107,364, authorized the United States Patent (USP) 4 of Sabee on May 30th, 1989,834,741 and pendent, on February 28th, 1991 the common given Application No. by applications such as Gerald M.Weber be 07/662,536, Application No. 07/662,543 on February 28th, 1991 by applications such as Kenneth B.Buell.

So what the fold line in the fold of the surface layer of roll extrusion ring grain should transversely be arranged surface layer vertically is extendible.In other embodiments, the fold line can be along the longitudinal, both direction and/or other direction are arranged simultaneously.Surface layer 38 will be extendible on the direction perpendicular to the fold line.

In a preferred embodiment, surface layer 38 is hydrophobic words, what the liquid infiltration by surface layer 38 will be faster than non-hydrophobic facing.This will reduce body exudates and can flow out surface layer rather than be absorbed the possibility that sandwich layer absorbs.Surface layer can make it have hydrophobicity its processing with surfactant.The proper method of application surface activator has been described in the United States Patent (USP) 4,950,254 and 5,009,653 of Osborn.

In addition, in preferred embodiment, the absorbed layer of the inner surface 38B of surface layer 38 below it fixed in contact.This contact relation causes the speed of liquid infiltration surface layer 38 not contacted with absorption piece faster than surface layer 38.By means of being bonded to, surface layer can make surface layer 38 and lower floor keep this contact relation in the lower floor.Yet, to following laminar surface, be not the sin qua non's with the surface adhesion of surface layer 38.By binding agent being applied between surface layer and the lower member, with lower floor's fiber and surface layer tangle up, surface layer 38 is fused on the following absorbed layer or, surface layer 38 can be kept contacting with following absorption piece by a plurality of unconnected single fusion sticky points by any way well-known in the art.

Absorbent core layer 42 is between surface layer 38 and backing layer 40.Absorbent core layer 42 has the device that absorbs menstruation and other proper effluent.Absorbent core layer 42 does not need to have the absorbability of the total amount of liquid that will absorb greater than the phase of giving.For the skin of user, absorbent core layer 42 is normally compressible, and is submissive and non-stimulation.

For this purpose, absorbent core layer 42 can comprise the general material in any present technique field.Infinite example comprises the wood pulp of nature material as pulverizing, it generally is called gas felt (airfelt), wrinkle yarn (creped) cellulose wadding, form the flocculation agent of hydrogel, improved cross-linked cellulose fibres (for example these are authorized on June 8th, 1993 in the United States Patent (USP) 5,217,445 of Young etc. and have been described), capillary channel (capillary chaunel) fiber (is that fiber has interior fiber capillary channel as authorizing Thompson on April 6th, 1993, Deng United States Patent (USP) 5,200,248 described), absorbing foams, absorb spongy body, synthesis of artificial short fiber, polymer fiber, peat bog, or the combination of any equivalent material or these materials.

Above-named flocculation agent also can be called " absorption gel rubber material " or " superabsorbent material ".Flocculation agent is such material, promptly when contacting with liquid phase on liquid such as water or other health, forms hydrogel thereby suck these liquid.So, the liquid that enters in the absorbent core layer 42 can be obtained by flocculation agent and accommodate, thereby has enhanced absorption ability and/or improved liquid retainability energy at the article that this provides.Be used in flocculation agent in the absorbent core layer 42 and generally will comprise having insoluble in water basically, crosslinked slightly, close in the part, form the polymeric material granule 41 of hydrogel.Flocculation agent can be any form, as is ball shape, lamellar or fibers form.

In a preferred embodiment shown in Fig. 2, absorbent core layer 42 is a kind of laminated products.Laminated product be by as for the super absorbing polymer material layer of granule 41 forms constitutes, it be positioned at two gas twisted weave things promptly be respectively first and second tissue layer (or " on " and the D score tissue layer) between 43 and 47.First and

second tissue layer

43 and 47 can keep super absorbing polymer material, and the horizontal wicking (wicking) of effluent of the absorption run through absorbent core layer 42 and the absorbability that provides are provided.

Tissue layer

43 and 47 can be made up of single fabric web, and this fabric web is with being positioned at or two particles of superabsorbent material 41 folds in addition that separate between the thin layer of (or different) fabric equally.

The laminated product that is suitable for is a kind of from Muscatine, the super absorbed layer stampings (the fiber process company limited is registered as TM with WATER-LOCK) of the known WATER-LOCK L-535 of the fiber process company limited of Iowa.Super absorbed layer stampings are like this authorized the United States Patent (USP) 4,467,012 of Pedersen etc. on August 21st, 1984, the United States Patent (USP) 4 of authorizing the United States Patent (USP) 4,260,443 of Lindsay etc. on April 7th, 1981 and authorizing Kramer etc. on March 25th, 1986, disclosed in 578,068.Laminated product absorbent core layer 42 can be cut into joint-cutting to be become extendible.Absorbent core layer 42 shown in Fig. 1 is a kind of above-mentioned laminated products, it by joint-cutting (preferably spreading all on its Zone Full) with longitudinal extension.

In alternative embodiment, the fabric sheet that makes laminated product absorbent core layer 42 usefulness have stretching (that is, can make extension be of a size of 1.2 to 3 times extension of the non-extension size) power between 20% to 200% is made extendible.Such fabric sheet can be processed into multiple.In one embodiment, fabric sheet can be traditional (creped) crape fabric.For example, fabric sheet is a kind of BOUNTY fabric, and before any crape was extracted out from fabric, one directly obtained the BOUNTY fabric after fabric crape leaves the Yankee drying machine.The processing method of making this fabric is authorized on March 24th, 1992 in the United States Patent (USP) 5,098,522 of Smurkoski etc. and has been described.

The longitudinal edge of sanitary towel 20 and

end limit

22 and 24 are preferably sealed, prevent liquid or contain liquid superabsorbent material wicking from sanitary towel (Wicking) and discharge when sanitary towel is extended.On the other hand, can seal the 42C of limit portion and the 42D of absorbent core layer 42 rather than seal the limit portion of whole sanitary towel.For example, the limit portion of sandwich layer 42 can be sealed or be covered by tissue layer.In another alternative embodiment, the limit portion of fabric can be folded, or turns up on the contrary and discharge from sandwich layer 42 preventing wicking and to prevent liquid or contain liquid particles of superabsorbent material 41.Round all permanent seals of sanitary towel's 20 peripheries should when elongating, can not break (, between the whole operating period of sanitary towel, should keep any sealing.)。

Backing layer 40 prevents to be absorbed that sandwich layer 42 absorbs and the effluent that holds is got wet and sanitary towel's 20 contacted article, as panty, and flyaway trousers and underwear.40 pairs of liquid of backing layer (for example, menstruation and/or urine) are impervious.Preferably by what approach, softish, non-sepage material constitutes backing layer 40.

Backing layer 40 can be by weaving or non-woven material, polymer thin film such as polyethylene or polypropylene thermoplastic thin film, or the non-woven material that synthetic material if you would upper film constitutes.Preferably, backing layer 40 is a kind of polyethylene films, and its thickness is about 0.012mm (0.5mil) to 0.051mm (2.0mils).Typical polyethylene film is by ClopayCorporation of Cincinnati, and Ohio makes, and the trade mark is P18-0401 and by Tredegar Film Products of Tevre Haute, and Indiana makes, and the trade mark is the product of XP-39385.

Surface layer 40 best embossing and/or unglazed processing are to have the outward appearance that resembles clothes.In addition, surface layer 40 can allow steam to discharge (that is, surface layer 40 can be suitable for sucking) from absorbent core layer 42 simultaneously still to avoid effluent to pass through surface layer 40.Can wash or biodegradable surface layer also can together use with for example panty described here lining parts.

By carrying out machined, as pleating on backsheet, wrinkling or roll extrusion ring grain, it is extendible that backing layer 40 is become.Yet, preferably, make extendible backing layer 40 with the high resiliency thin film, this thin film is authorized on October 9th, 1984 in the United States Patent (USP) 4,476,180 of Wnuk and has been described.This thin film is obtained as Exxon thin film EXX-500 (EXX-7 in the past) by Exxon ChemicalCompany of Lake Zuroh IL.

Another kind of good especially extensible backing layer 40 is a kind of by Findley AdhesiresCompany of Wauwatosa, and the model that Wiseonsin makes is the extensible tacky film of #198-338.The Findley tacky film is that a kind of percentage elongation is the non-sepage thin film of 200-300%.The Findley tacky film is preferably, but because it also is elastic extension.Backing layer 40 can be by comprising that two-layer or multiwalled extensible laminar structure constitutes.For example, can be gluing film formed and cover extensible nonwoven web or extendible thin film in its both sides and form backing layer 40 by one deck Findley.The another kind of backsheet that is suitable for is a kind of described nonwoven/film laminated product of United States Patent (USP) of authorizing Osborn on April 16th, 1991.

Sanitary towel 20 also has the additional not too extension 216 between surface layer 38 and absorbent core layer 42.Not too extension 216 approximately is arranged on the center 32 of sanitary towel 20.Not too extension 216 bending (preferably lifting) to improve Body contact with the stretching of sanitary towel's remainder.

What not too extension 216 generally can be by any kind, compare parts with some other parts of the main part 21 of sanitary towel 20 at least and form with less extension.(these other parts of sanitary towel are called those parts of the sanitary towel except the barrier layer of not too extending.Preferably irrespectively work with less extension in the barrier layer.) less extension 216 can be inextensible relatively.In other embodiments, less extension can have percentage elongation.

Less extension 216 has one in the face of human body side 216A, in the face of coat side 216B, a pair of longitudinal edge 216C and pair of end limit 216D.The structure of less extension 216 is preferably inflexible, and when the longitudinal edge 216C that is applied to less extension 216 when the transverse compression power of inside orientation went up, it was enough to allow to bend or bend.During use, the less extension 216 any Z direction of (that is, being similar to sponge " flattening ") unlikely generation that preferably should can inwardly not rupture along with the transverse compression masterpiece is used in the sanitary towel 20 promotes.Less extension 216 can be the form of material layer, or certain other appropriate format.When less extension 216 dry and it become wet (as by body exudates) after under two kinds of situations, it all will keep enough rigidity.

Less extension 216 can be made by any suitable material.Material should be soft, flexible and absorbefacient, but have the rigidity that is enough to bending or bending.Less extension 216 can be made by the absorption core of a lot of basic types of listing at this.Yet these cores preferably should not bear any processing (as the roll extrusion ring grain, pleating, fold or joint-cutting) makes material have extensibility.Less extension 216 among the embodiment shown in Fig. 1-3 comprises the super absorbed layer stampings of a non-joint-cutting.Less extension 216 preferably also be designed to have bending as by fold it to produce the machine-direction oriented fold line of central authorities thereon.

Less extension 218 can be placed on the top of sandwich layer 42 simply and be close to be attached to sanitary towel 20 around on the parts and be fixed to the appropriate location.In the embodiment shown in Fig. 1-3, less extension 216 is fixed on the single-point 230 on each that is positioned at its vertical side.

When sanitary towel 20 was elongated, the center 32 of sanitary towel narrowed down.This will make longitudinal centre line L crooked or bending and the formation oncus 218 (see Figure 4 and 5) of less extension 216 along sanitary towel 20.

Barrier layer 44 shown in Fig. 1-5 is made of the narrow material bar that covers surface layer 38.Preferably place along vertical side 22 of sanitary towel at least on barrier layer 44.Each of band 44 all has towards outside 44A, towards inboard 44B, a pair of inner edge 44C ' and the outside 44C of comprising " limit portion and pair of end portions 44D." what be provided be away from the intersection of the vertical and cross central line of sanitary towel than inner edge 44C ' for outside 44C.

By " and end limit 44D is fixed to the limit portion that is adjacent on formation barrier layer surface layer 38 above along the periphery 26 of the sanitary towel outside 44C with band.The inner edge 44C of band does not have fix in position free far lateral side with the formation barrier layer on the surface layer between strap ends 44D.Fig. 1 and 2 shows barrier layer 44 is connected to preferred mode on the surface layer 38.The outside 44C on barrier layer 44 among the embodiment that illustrates " has and the limit portion 22 of sanitary towel and the 24 same profiles of looking squarely.44C is " mutually concordant with these sides in the outside.Inner edge 44C ' inwardly elongation above absorbent core layer slightly.

Adopt the baffle seal 92 of best non-sepage that barrier layer 44 is connected with surface layer 38.Baffle seal 92 can be the fixture of any suitable type described here.Preferably, baffle seal 92 or form by glue or by heat seal, it is applied to and is used for fixing on the roughly the same profile of the peripheral seam 90 of surface layer and backing layer (hereinafter being described).

Barrier layer 44 shown in Fig. 1 and 2 only has a kind of preferable structure.The size and dimension on barrier layer, and the mode that the barrier layer is linked in the sanitary towel has many possible variations.For example, in other embodiments, the barrier layer can be very big, as the absorbing articles of dissimilar similar diapers.The profile on barrier layer is not must be identical with the limit portion of absorbing articles, does not need they mutually concordant connections of limit portion with absorbing articles yet.For example, on the immediate limit that the barrier layer limit portion with absorbing articles that can link inwardly separates.In a spot of preferred embodiment, the barrier layer also can have the far lateral side that is connected with sanitary towel at some the some place between the end, barrier layer.Other embodiment also is possible.

Barrier layer 44 can by any suitable anti-leakage liquid or liquid barrier materials form.With compare applying the parts (as surface layer 38) that under the power effect barrier layer are connected on it equally, the barrier layer is less extension.The barrier layer can not extended relatively.In other words, compare the extensible but less extension in barrier layer with the parts that the barrier layer will be linked on it.

In the preferred embodiment shown in Fig. 1-3, the barrier layer is made up of a thin film extendible, best elastic extension, such as being a kind of thin film of making according to the United States Patent (USP) 4,476,180 of authorizing Wnuk on April 16th, 1991.A kind of such thin film is by Exxon Chemical Company of Lake Zurich, the high resiliency thin film EXX-500 (being EX in the past)-7 that IL obtains).In a specific preferred embodiment, barrier layer 44 comprises such thin film band 144, and it has soft-surface in the face of health the wearer is provided enhanced comfort.Fig. 2 shows an example, wherein thin film band 144 has softish on the outside that is laminated to them, high hydrophobicity preferably, non-woven material 146.

In a specific preferred embodiment, band also can fixingly along the end limit of sanitary towel form the barrier layer with the whole periphery along sanitary towel similarly.Band along side and end limit can interconnect, and so that a successive barrier layer to be provided round whole periphery, perhaps they can not connect.

The barrier layer is with following mode effect.If sanitary towel is not stretched, side slat band 44 is against surface layer 38 flat placements.When sanitary towel stretches, the disconnected part of band 44 from flat position become than stand up position and along the longitudinal edge of sanitary towel form as barrier liquid flow through surface layer the barrier layer towards interior lip (or lining ring).The lifting of band is because the connection and the different cause of disconnected limit elongation of barrier layer band.Preferably see Fig. 5, barrier layer and limit portion of sanitary towel all roll to form lip and to provide " U " type barrier layer structure along limit portion of sanitary towel.

Above-mentioned sanitary towel's parts (surface layer, backing layer and absorbent core layer, or the like) can be any the permission sanitary towel 20 suitable mode of extending be fixed together.In the preferred embodiment shown in Fig. 1, make the limit portion of surface layer 38 and backing layer 40 outwards extend through the limit portion of absorbent core layer 42 thereby measure the size of deciding sanitary towel's 20 parts.The surface layer 38 limit portions that outwards extend through sandwich layer 38 limit portions are fixed to the appropriate section of backing layer 40.As shown in Figure 1, surface layer 38 preferably is fixed on the backing layer 40 along anti-leakage liquid seam 90.For this purpose, seam 90 can be formed and preferably be formed by surface layer 38 being adhered to backing layer glue upper type by the normally used any way in present technique field.

Found that such structure is suitable for the parts of fixing sanitary towel rather than the surface of adjacent component is interfixed.But, as above-mentioned, preferably also fix these parts through the surface of some parts of being everlasting.

Above-mentioned is a kind of preferred embodiment of simple structure.(can make and otherwise connect various parts.) for example, the present invention also comprises and be called " tubulose " product, in this product, sepage lid material (as surface material) can encase fully round absorbent core layer and backing layer, and then, parts can be fixed together.In replace arranging, surface layer can encase round sandwich layer, and the sandwich layer that encases can be placed on the backing layer and is fixed on the backing layer.

The outer surface 20B of the sanitary towel shown in Fig. 3 can have a fastener, such as pressure sensitive adhesive 50, so that sanitary towel is fixed on the crotch of panty.Used glue can be other suitable profile.Glued joint component 50 can be extendible, non-extension or when using it the some parts of figure be extendible and some parts is inextensible.

As pectin is extendible, and preferably roughly the amount as shown in table 1 with sanitary towel is identical for its elongation so.The extensible glue that is suitable for comprises extendible glue itself, and extensible glue/barrier film compositions.Can use any extensible glue well-known in the art.Extensible glue/barrier film the compositions that is suitable for comprises elastic stretching glued membrane such as Findley glue 198-338; Or the spray glue on the low elastic modulus film, but do not limit the non-extension glue that is used on the extensible barrier film material as 3M glue 1442.

The non-extension glue that is suitable for can be those and is defined as the qualified effectively from the production number A305-4 of Century Adhesine or from Anchor Contineutal of 0.6mil, Inc., 3Sigma Division, of Covington, Ohio, glue and the Fuller H-22381P glue of making by H.B.Fuller Co..The non-extension that is suitable for is gluedd joint component by United States Patent (USP) 4,917, and 697 have at length been described.

Splicing component 50 is preferably taken off layer (or a cover fillet) 52 by one and is covered.Can use any commercialization effectively to take off layer.In a preferred embodiment, taking off layer can be replaced by a packing material, and it has the sanitary towel of encapsulation separately and uses the back to dispose the package of sanitary towel in sanitary towel, as authorizing Swanson on the 3rd at December in 1985, Deng United States Patent (USP) 4,556,146 disclosed the same.

By glue fastener has been carried out preliminary simple description.Yet the type of fastener is not limited to glue.Preferable fastener comprises and is not limited to glued joint component, as pressure sensitive adhesive, and the molectron of mechanical fastener and glue and mechanical fastener.Sanitary towel can have standby polyethylene end bib 140.

Following Example further illustrates practical operation of the present invention.Yet following Example is not subjected to the restriction in the scope of this absorbing articles that comprises.

Example

Obtain the parts of sanitary towel.Surface layer 38 is pressed United States Patent (USP) 4,463,045 make and the roll extrusion ring grain so that it has percentage elongation.Form with monolayer BOUNTY fabric obtains the superabsorbent material overcoat, and the BOUNTY fabric is taken from the Yankee dryer that does not remove the wrinkle removing yarn.Sandwich layer is absorbent gelling material (AGM) laminated product, it above its total length joint-cutting so that the longitudinal extension rate to be provided.Backing layer is Findley 198-338 glue-line goods and nonwoven fibrous web.Nonwoven fibrous web is from Veratec of Walpole, the Celanese nonwoven fibrous web t-138 of Massachusetts.Will be thereby nonwoven fibrous web is laminated on the Findley glued membrane laminated product in longitudinal stretching (this direction perpendicular to adhesive-bonded fabric in fibre orientation).Non-woven material will be positioned at the outside of finished product.

Following completed knocked down products.By size cutting roll extrusion ring grain surface layer.Thereby Findley H 2031 glue are applied on the surface layer by 0.005g/in2 amount with spiral figure wrinkle yarn BOUNTY fabric is adhered on the surface layer.Cover facing on the end regions of coat side with wrinkle yarn BOUNTY piece of cloth at sandwich layer.Absorbent core layer is placed on the face of backing layer." * 25/8 non-joint-cutting AGM laminated product is placed on the center top of sandwich layer in the face of the people side with 21/2.An AGM laminated product that will be positioned at backing layer longitudinal edge center with glue adheres to the limit portion of backing layer.Surface layer and wrinkle yarn woven fabric laminated product are placed on the sandwich layer top.Fixed part also makes limit portion smooth.Roll extrusion limit portion is with sealing strip portion.The finishing final form.By the side bonding EX-500 piece of heat-sealing along pad, thereby far lateral side is being extended 2mm towards the sandwich layer center that is positioned on the narrowest center of pad above the surface layer, and at the wideest end regions elongation of pad 5mm.Fullev HL 2238 panty joint glues (PFA) are adhered to facing on the surface of coat of product in spiral figure mode shown in Figure 3.On surface layer, spray upward from Lonza Inc.Williamsport, the 0.01g Pegospere 200ML surfactant of Pa.

Preferable sanitary towel has been described, the embodiment of many other sanitary towels by documents and materials in addition open.Sanitary towel can have some or all of parts described herein or characteristics.For example, sanitary towel 20 also can have a pair of lappet, and they adjoin each other and cross out from the side of sanitary towel's main part.(main part is the part that sanitary towel does not have lappet.) be applicable to that the many sanitary towels with lappet in the sanitary towel 20 of the present invention are known.This lappet is disclosed by following United States Patent (USP): the name of authorizing McNair on August 25th, 1981 is called the United States Patent (USP) 4 of " sanitary towel ", 285,343, the name of authorizing Van Tilburg on May 20th, 1986 is called the United States Patent (USP) 4 of " sanitary towel ", 589,876, the name of authorizing Mattingly on August 26th, 1986 is called the United States Patent (USP) 4,608 of " sanitary towel's adhering mode ", 047, the name of authorizing Van Tilbung on August 18th, 1987 is called the United States Patent (USP) 4,687,478 of the shaping sanitary towel of lappet " band ", and on April 27th, 1993 the review patent B of cloth frequently, 4,589,876.Disclosed in the lappet of the preferred type that some the are specific U.S. Patent application below: on October 1st, 1991 sequence number by applications such as Lavash be 07/769,891, name is called the application (PCT publication number WO 93/06805, open on April 15th, 199) of " have lappet and without the absorbing articles in percentage elongation zone "; And simultaneously in application on June 30th, 1992, sequence number by applications such as Lavash is 07/906 respectively, 593 applications that are called " having the absorbing articles that integral body can be taken off material " and be 07/906,629 and be called the application of " absorbing articles " by the sequence number of applications such as Osborn with pleating lappet.

In addition, also be to be understood that PCT publication number WO 93/01785 and WO 93/01786 and can be at this in conjunction with reference in these all test methods of listing.In this respect, the method of measuring one inch (2.5cm) band longitudinal extension rate can change, and promptly not only by longitudinal centre line cutting band, also is parallel to longitudinal centre line cutting band, like this, the whole width of sample comprises one of absorption piece of absorbing articles at least.Yet sample also need not be too near to limit, the longitudinal side cutting of absorbing articles so that it has any side resilient characteristic.If any sample of Ce Lianging drops in the scope represented in claims like this, so, absorbing articles drops in the scope of claims.

Term " panty lining (pawty liner) " or " panty lining (pantiliner) " refer to the absorbing articles still less looser than sanitary towel, and it is worn at women's intermenstrual period usually.The name that the example of the absorbing articles of panty lining form is authorized Osborn on April 19th, 1988 is called in the U.S. Pat 4,738,676 of " panty lining " and discloses.

Term " incontinence article " refers to pad, underwear (pad by the suspension system of same-type) as band or analog fix in position, the insert that is used for absorbing articles, absorbing articles capacity reinforcement, panties, whether mattress and analog with are used by the adult or other easy incontinence people uses irrelevant.The incontinence article with said parts that are suitable for are disclosed by following United States Patent (USP): they are United States Patent (USP)s 4 of authorizing Strickland etc. on March 3rd, 1981,253,481, authorize the United States Patent (USP) 4,597 of Buell, 760, above-mentioned United States Patent (USP) 4,704,115, authorize the United States Patent (USP) 4 of Ahr etc., 909,802, authorize the United States Patent (USP) 4 of Gipson etc. October 23 nineteen ninety, 964,860, and be 07/637,090 and 07/637 by the Application No. of Noel etc. and applications such as Feist respectively on January 3rd, 1991,571 application (PCT publication number WO 92/11830 and WO 92/11831, both are all open on July 23rd, 1992).

Key of the present invention is to be through the absorbing articles in wearer's underwear crotch district.Yet characteristics of the present invention are the absorbing articles that also can be used for as diaper.The absorbing articles that is diaper is through on the infant and the easy incontinence person, promptly is fixed on wearer's waist.3,860,003 and 1992 year JIUYUE of United States Patent (USP) that the suitable diaper that can have said parts was authorized Buell on January 14th, 1975 was authorized the United States Patent (USP) 5,151 of Buell on the 29th, and 092 is disclosed.

By all patents that patent application of the present invention disclosed, patent application specification (and any patent and any corresponding disclosed foreign patent application of authorizing immediately), and publication is in this incorporated by reference.Yet any obviously document in this incorporated by reference is not all thought instruction or disclosed the present invention.Also know better any commercial material described here or product and all do not think instruction or disclosed the present invention.

Illustrated and illustrated specific embodiment of the present invention, other variation and change all do not exceed the spirit and scope of the present invention for those skilled in the art obviously.

Claims

1. an absorbing articles has the longitudinal centre line at longitudinal extension, at the cross central line of horizontal expansion, forms a pair of vertical side and the pair of end limit of absorbing articles periphery, and described absorbing articles comprises:

The sepage surface layer,

Link the non-sepage backing layer on the surface layer,

Absorbent core layer between surface layer and backing layer, and

With the adjacent barrier layer of one of vertical side of absorbing articles at least, this barrier layer has inner edge, outside and pair of end portions, wherein the outside on barrier layer and end link on the surface layer and at least the part of barrier layer inner edge be not connected on the surface layer between the both ends, and wherein

At least surface layer is extendible and to compare with surface layer be less extension on the barrier layer, so when surface layer extended, the barrier layer moved to more stand up position to form the lip as the mobile barrier function of barrier liquid.

2. according to the absorbing articles of claim 1, it is characterized in that surface layer vertically is being extendible.

3. according to the absorbing articles of claim 1, have two barrier layers, each barrier layer is adjacent with each vertical side.

4. according to the absorbing articles of claim 1, it is characterized in that the barrier layer covers on the surface layer.

5. according to the absorbing articles of claim 1, it is characterized in that backing layer and absorbent core layer also are extendible.

6. according to the absorbing articles of claim 3, further comprise a barrier layer that abuts each end limit.

7. according to the absorbing articles of claim 1, it is characterized in that the barrier layer comprises the thin film of an anti-leakage liquid.

8. according to the absorbing articles of claim 7, further comprise the flexible material that covers on the described anti-leakage liquid thin film.

9. according to the absorbing articles of claim 1, have the first end district, the second end district and be positioned at center between first and second end region, wherein the center of absorbing articles is narrower than end region.

10. according to the absorbing articles of claim 9, have water and leak shape.

11., have 8 word shapes according to the absorbing articles of claim 9.

12. absorbing articles according to claim 1 or 9, have at least by surface layer, the main part that backing layer and absorbent core layer are partly formed, the main part with a pair of vertical side and pair of end limit further comprises the outwardly directed lappet of a pair of longitudinal edge from the absorbing articles main part.