CN1241925A - Extensible and/or flexible disposable absorbent article for topical adhesive attachment to the skin of a wearer - Google Patents

Abstract

The present invention relates to disposable absorbent articles particularly sanitary napkins, pantiliners, adult incontinence products or sweat pads. In particular the present invention relates to such disposable absorbent articles which are worn by direct attachment to the skin of the wearer in the area were absorption of bodily liquids is desired. In order to provide the articles according to the present invention with additional comfort they are adaptable, preferably elastically adaptable.

Description

The part sticks with glue agent and is fixed to tensile and/or flexible disposable absorbent article on the wearer's skin

Invention field

The present invention relates to disposable absorbent article, particularly sanitary towel, scanties lining, adult incontinence products or sweat-blocking pad.The present invention be more particularly directed to this kind disposable absorbent device, these articles for use are by being worn on the position that needs absorb body fluids on the skin that directly is fixed on the wearer.In order to make articles for use of the present invention have additional comfortableness, they should be adaptable (adaptable), but preferably elasticity adapts to.

Background technology

The general prior art that locally applies to the disposable absorbent article field on the wearer's skin is especially developed in Band-aid, Gypsum Fibrosum preparata (plaster) and binder field.But these absorbent devices with in case of emergency, for example wound occurred in the wearer's skin usually in this case, need to absorb the body fluid that wound is discharged.In this sense, the performance parameter of absorbent device, as comfortable and use easily and use, painless removal, discreteness are subordinated to aseptic as wound, the standard of treatment support, mechanical protection.And these class wound covering absorbent device great majority are used for this class skin part, before using absorbent device, can remove the chaeta at these positions or not long chaeta or chaeta herein seldom.

The present invention does not relate to the wound covering absorbent device, and relates to absorb the absorbent device of nature from health rather than the effusive body fluid of wound.For example, sanitary towel or the scanties lining that is used for genital area is exactly these class articles for use.Being worn on as the incontinence article of people's genital area or the sweat-blocking pad that is worn on axillary fossa also is theme of the present invention.

These class articles for use are used for wearer's skin part, thus this class position usually growth to have the hair of quite big quantity to remove the requirement of articles for use particularly important easy and painlessly.These class articles for use have been done general disclosure in United States statutory invention registration H1602 or WO96/33683.The more details of these class articles for use has been done research in as PCT application WO95/16424.Disclosed in this document and had the hygienic article that is administered to the body and function adhesive on wearer's side (body adhesive) of sanitary towel along whole periphery.The root problem that this document exists mainly is that safety is fixed on the skin, mentions simultaneously and uses the back at the separation problem that wearer is not caused these class articles for use under the undue pain.

The open part of WO95/16424 comprises the rheology standard of labor body and function adhesive.But this document does not almost relate to the painless removal problem of these class articles for use, because the rheology standard of describing comprises depilation, promptly removes hair, and commercially available compositions is as the STREP MIELE (TM) that is sold by Laboratori Vai S.p.A in Italy.The adhesive of the localized immobilization of mentioning in WO95/16424 comprises that also of today being used for is fixed to pressure-sensitive adhesive on the underwear with sanitary towel.And this document has only been discerned static rheological charactristics, does not promptly describe the dynamic rheology feature of body and function adhesive.

WO96/13238 discloses the body and function adhesive model that depends on frequency.But disclosed all measured values as on the 9th page, all are to carry out under-60 ℃～+ 120 ℃ temperature and under the actual frequency of 0.1～100 radian per second (rad/s).For the necessary data under the temperature that is applied (about 20 ℃, general bathroom, i.e. storage temperature), used Williams-Landel-Ferry (hereinafter claiming WLF) formula.

This WLF equation is an empirical formula, and only in specific scope effectively, can not be used to be extrapolated to temperature below the glass transition temperature that is lower than polymer adhesive as it, same WLF equation can not be used for based on the numerical value that obtains below the glass transition temperature.About the details of WLF equation and application thereof can find in following document: " Principles ofPolymer processing " (the Polymer Processing principle) of Z.Tadmor and C.G.Gogos, by John Wiley; " Viscoelastic Properties of Polymers " (viscoelastic properties of polymer) of Sons publication or J.D.Ferry is also by JohnWiley ﹠amp; Son publishes.Because this disappears from WO96/13238 already, so can not assess the suitability of disclosed data.And the disclosure content does not relate to and has adaptive absorbent device.

European patent application EP-638303 has disclosed uses the body and function adhesive so that make the side hoop remain on stand up position on the side hoop of sanitary towel.Switzerland publication number CH-643730 has disclosed the purposes of the sanitary towel with outer chamfered edge, in four bights of outside the body and function adhesive is arranged so that just in time provide the body and function adhesive areas in the outside in the hair growth district of pubis.

The neither one file relates to the absorbent device that is fixed on the wearer's skin and must follow the interior general relative motion of skin area that stretching, extension, contraction or articles for use cover in the prior art.In wound covering thing field, be well known that and be applied to the common Gypsum Fibrosum preparata on the joints of hand or limit the motion in this joint or acceptable covering can not be provided.Also there is same situation for the absorbent device of the present invention in genital area that is fixed to the wearer or the axillary fossa.But for absorbent device, problem is very complicated, may separate easily because can not follow the articles for use of relative motion, thereby cause the leak of liquid of planning to absorb.

Based on above-mentioned prior art, an object of the present invention is to provide to be fixed to and be used on the wearer's skin absorb from the wearer's body disposable absorbent article of effusive liquid naturally, these articles for use have the relative motion of adaptability with the skin area of following its wearer who is covered simultaneously.Another object of the present invention is painless removal absorbent device.

A further object of the present invention is to guarantee when removing absorbent device, does not have remaining adhesive to stay on wearer's the skin or hair.A further object of the invention provides disposable absorbent article, wears the liquid that will flow to the absorbent device outside and minimizes or eliminate thereby these articles for use discharge the position near wearer's liquid.For the disposable absorbent article that is worn on wearer's crotch portion, this shows as the improved safety that prevents the pollution of surrounding skin tissue and medicated clothing.

Except above-mentioned purpose, reduce or even sanitary towel, scanties lining and the sanpro of eliminating the abnormal smells from the patient that discharges from product also be desirable, because it is applied to a kind of odor seal is provided on the wearer's skin, sealing has prevented the abnormal smells from the patient of the liquid that absorbs or has arrived the outer and abnormal smells from the patient that forms of absorbent device by the liquid that absorbs.

Summary of the invention

The present invention relates to the part sticks with glue agent and is fixed to disposable absorbent article on the wearer of these class articles for use, these articles for use have a surface and the outer surface towards the wearer usually, the articles for use below being worn on medicated clothing, this outer surface is also referred to as the surface towards medicated clothing.These articles for use have a longitudinal axis, and this longitudinal axis is divided into the left and right sides with the articles for use of being worn, and these articles for use also have a transverse axis, and this transverse axis is vertical with the longitudinal axis.These articles for use comprise an absorbent article core structure, this absorbent article core towards the wearer the surface and between the medicated clothing face, be used to absorb nature from the effusive liquid of wearer.

Disposable absorbent article of the present invention is included in its adhesive at least a portion on wearer's surface and is used for the part and sticks with glue the skin that agent is fixed to articles for use the wearer.Articles for use of the present invention are being parallel at least one direction of the longitudinal axis and/or transverse axis, and preferably both direction can adapt to.

In one embodiment of the invention, these articles for use are become corrugated or pleating and adaptability is provided.This can be parallel to the longitudinal axis or transverse axis or both combinations and provide.Can consider also to be parallel to that two axles ripple or pleating, thereby obtain at the adaptable articles for use of both direction.

In another embodiment of the invention, when the size by some part of inhaling the skin surface that warm articles for use cover reduces, articles for use are contractile, it has adaptability, and but articles for use are elastic shrinkage, and in this case, articles for use and tensile surface are (as when mentioning arm, at the axillary fossa position) stretch together, it can be returned to original size at least in a way simultaneously.This elasticity can have elasticity by a plurality of parts that make absorbent device or make some part of each parts of absorbent device have elasticity setting.

Can use any body and function adhesive that can be accepted by the wearer of articles for use of the present invention.But, particularly preferably be adhesive and have following properties.The feature of adhesive especially is to have elastic modelling quantity under the temperature of 37 ℃ (100), is abbreviated as G ' 37, has viscous modulus under the temperature of 37 ℃ (100), is abbreviated as G " 37.Thereby select adhesive to be no more than 150% of G ' 37 under 1 radian per second with difference with dynamic elasticity character G ' 37 under the frequency of G ' under the frequency of 100 radian per seconds 37 and 1 radian per second (Δ G " 37), preferably 80%, or preferably less than 1000Pa.Thereby further select adhesive to be no more than 10000Pa in the difference of G under the frequency of 100 radian per seconds " G under the frequency of 37 and 1 radian per second " 37 (Δ G " 37), preferably be no more than 5000Pa, most preferably be not more than 1000Pa to have dynamic adhering performance.

Particularly preferably be the G ' 37/G of articles for use of the present invention in the whole frequency range of 1～100 radian per second " 37 ratio is more than or equal to 1, more preferably greater than or equal 1.6, most preferably more than or equal to 3.3.

At least " 37 ratio can change along with the increase of frequency the G ' 37/G in the frequency range of 1～100 radian per second, needn't be directly proportional with frequency change simultaneously." 37 ratio is not taken in the frequency range and changes greater than 3 times this G ' 37/G, should most preferably should be constant greater than 2 times preferably.

When 1 radian, the preferred value of G ' 37 is lower than 20000Pa, preferably is lower than 15000Pa, most preferably even less than 10000Pa." 37 value should not surpass 15000Pa, and it should be preferably less than 10000Pa, most preferably even less than 5000Pa on the other hand, G under the frequency of 1 radian per second.Above-mentioned rheology standard can satisfy by adhesive compound, this moment compositions comprise 51%～99.5% be the plasticized compound or the component of liquid in the time of 20 ℃, 0.5～20%, preferred 5～15% polymerizable compound or component and a kind of tackifying resin of solvable or swellable in plasticized compound, the amount ranges of this resin is 0～600% of a polymerizable compound weight.Plasticized compound or component are preferably selected from water, alcohol, preferably glycerine, glycol, Polyethylene Glycol, liquid polybutadiene, oil or its combination, polymerizable compound or component are preferably selected from block-copolymer-thermoplastic elastomer (TPE), styrene-block-copolymer and hydrogenant styrene-block-copolymer simultaneously.

Be more typically, preferred body and function adhesive is that part is hydrophobic at least, and is preferred 60%, and more preferably the adhesive of 80% weight is made of hydrophobic components, and it is hydrophilic most preferably not having a kind of material in the adhesive, and promptly it is made by hydrophobic components fully.

In particularly preferred embodiment of the present invention, adhesive covers less than 20%, perhaps even be more preferably less than the surface towards the wearer of 10% absorbent device.The present invention is the most favourable to be to be applied to sanitary towel or scanties lining field.

Detailed Description Of The Invention

The present invention relates to adapt to and can directly apply to the disposable absorbent article on the user skin.These articles for use avoid staiing, improving the physiological comfort of user to the medicated clothing that body fluid has absorbability, protection user, and produce easily and pack.Describe disposable absorbent article below with reference to sanitary towel or menopad, but term " disposable absorbent article " comprises medicated underpants lining, adult-incontinence articles or perspiration pad.Term used herein " sanitary towel " refers near be worn on the perineal region and planned to absorb and hold the multiple body fluid (as vagina Excreta, menstruation and/or urine) of discharging from health and once using the back to plan to throw away by the women articles for use.This disposable absorbent article preferably approaches, and most preferably 1～5mm is thick, can be flat basically before use, perhaps is preformed state.

Term used herein " connection " or " fixing " comprise wherein that first parts are directly connected to the configuration of second parts and wherein by first parts are connected on the intermediate member, thereby intermediate member is connected to the configuration that first parts on second parts are connected to second parts indirectly.

An embodiment preferred, sanitary towel of the present invention comprise liquid thoroughly top flat, be connected to liquid-tight egative film and the absorbent article core between top flat and egative film on the top flat.Sanitary towel has two first type surfaces, with Body contact or towards wearer's surface with towards or contact the surface of medicated clothing.

In one aspect, the present invention relates to the adaptability of product.The material of the parts of fitness by selecting product noted earlier, its separately quantity and they are handled so that adaptive degree to be provided.Be apparent that for those of ordinary skills, in order to reach adaptability of the present invention, the selection of raw material types, quantity and processing should with other desirable characteristics of absorbent product, as moisture absorption capacity, infiltration rate and between the operating period dry tack free etc. in the top flat outside balance each other.

Therefore, the description of the typical material of following critical piece to absorbent product will provide a large amount of product mutation of satisfying needs of the present invention.

Except adaptability, but are elastic stretch according to the absorbent device of the preferred embodiments of the invention.Term used herein " but elastic stretch " meaning is when remove stretching force, and articles for use will trend towards being returned to its " elongation " or " stretching, extension " (or the size of " originally ").But it needn't be returned to the size that it does not stretch fully.If but absorbent device is an elastic stretch, it can one or two direction (they are not parallel) in the plane of articles for use be extensile, and promptly profile is parallel to the surface towards the wearer.

But but the collapsible and used material of articles for use elastic stretch itself can be elastic stretch or handle so that elastic stretch to be provided.Particularly, in this case, can use elasticity stock footage, elasticated topsheet material, filamentary material and elastic webbing, silk or net and to material shirred, pleating or the ring ingot roll.If but when preparing the absorbent device of elastic stretch of the present invention, suitable material and method are well known in the art, as in the U. S. application 08/192240 in 4 days February in 1994 being disclosed in the concrete reference of this paper in detail to make things convenient for the selection of material.

The non-limiting embodiments of the critical piece of absorbent product will be described below.These embodiments are contractile, but preferably also are can use in the design of elastic stretch or non-stretching, extension.

Absorbent article core generally includes following parts: (a) optional main fluid Distribution Layer; (b) optional but preferred secondary fluid Distribution Layer; (c) fluid storage layer; (d) the optional fiber that stores below the layer (" bottoming " (dusting)) layer of being positioned at; And (e) other optional feature.A. main fluid Distribution Layer

An optional feature of absorbent article core of the present invention is the main fluid Distribution Layer.This main Distribution Layer be usually located at the following of top flat and with the top flat fluid communication.Top flat flows to this main Distribution Layer with the menstrual fluid of collecting and is used for final assignment to storing layer.Liquid not only carries out along thickness by the conveying of main Distribution Layer, and carries out along the length and the width of absorbent product.B. Ren Xuan secondary fluid Distribution Layer

The secondary fluid Distribution Layer also is the optional still preferred absorbent article core parts of the present invention.This pair Distribution Layer be usually located at the following of main Distribution Layer and with its fluid communication.The purpose of this pair Distribution Layer is to collect fluid from main Distribution Layer easily, and it is flowed to following storage layer rapidly.This helps the fluid displacement of the storage layer of lower floor to make full use of.C. fluid storage layer

The fluid storage layer be usually located at main or secondary Distribution Layer below, and with they fluid communication, this fluid storage layer contains specific absorbent gelling formed material and/or other hygroscopic material, it can form the carrier matrix that the absorbent gelling formed material is used.The absorbent gelling formed material is commonly referred to " hydrogel ", " superabsorbent ", " hydrocolloid " material.The absorbent gelling formed material be those when with aqueous fluid, when especially aqueous body fluids contacts, absorb this class I liquid I, thereby form hydrogel.These absorbent gelling formed materials can absorb a large amount of aqueous body fluids usually, and can also keep the liquid of these absorptions under middle pressure.These absorbent gelling formed materials are discrete, non-fibrous particulate forms usually.

The fluid storage layer can only contain the absorbent gelling formed material, and perhaps these absorbent gelling formed materials can even or non-homogeneous being dispersed in the suitable carriers, and perhaps it can only contain the moisture absorption carrier material.

Suitable carriers comprises cellulose fibre, is fine hair, tissue paper or paper, is used for those of absorbent article core as routine.Also can use the cellulose fibre of modification, as stiffening cellulose fibre.Also can use synthetic fibers, comprise the synthetic fibers of making by following material: cellulose acetate, polyvinyl fluoride, Vingon, acrylic acid (as Orlon), polyvinyl acetate, insoluble polyvinyl alcohol, polyethylene, polypropylene, polyamide (as nylon), poly-vinegar, bicomponent fibre, tricomponent fibre and composition thereof etc.Preferred synthetic fibers are about 3～25 dawn/long filament, are more preferably 5～16 dawn/long filament.Further preferably, fiber surface is hydrophilic or is processed into hydrophilic.Store layer and also can comprise the filler that alleviates back wet problem, as perlite, kieselguhr, Vermiculitum etc.

If anisotropically be dispersed in the carrier, storing layer can be local uniform, and promptly one or several direction in the scope that stores layer has the distribution gradient.Non-uniform Distribution also can refer to partly or entirely surround the carrier lamination of absorbent gelling formed material.If the use lamination, they can form having or do not have under the absorbent gelling formed material granule.Particularly, have now found that the fibre plate of air lay of heat bonding or the sheet or the lamination of lamination and/or heat bonding wet-laying are useful, especially concerning the scanties lining that does not use the absorbent gelling formed material.

Store layer and preferably comprise 15～100% absorbent gelling formed material and 0～85% carrier.Store layer and more preferably contain 30～100%, most preferably contain 60～100% sucting wet gel material and more preferably contain 0～70%, most preferably contain 0～40% carrier.

Suitable sucting wet gel material used herein is the most common to contain water-insoluble, crosslinked slightly substantially, the neutral polymer gel material of part.When contacting with water, this material forms hydrogel.This base polymer material can be from polymerisable, undersaturated acidiferous monomer preparation.The suitable undersaturated acid monomer that is used to prepare the used polymer sucting wet gel material of the present invention comprises lists in US patent 4,654,039 and as RE32,649 those monomers of promulgation again.Preferred monomer comprises acrylic acid, methacrylic acid and 2-acrylamido-2-methyl propane sulfonic acid.It is particularly preferred that acrylic acid itself is used to prepare the polymer gel material.The polymers compositions of being made by undersaturated acidiferous monomer can be grafted on the polymer moieties of other type, as starch or cellulose.The starch material of such polyacrylate grafting is especially preferred.Can comprise the starch, polyacrylate of starch, the polyacrylate grafting of the acrylonitrile grafting of hydrolysis by the preferred polymer sucting wet gel material of the monomer of general type preparation, based on the copolymer and the combination thereof of maleic anhydride.The starch of polyacrylate and polyacrylate grafting is especially preferred.

Although these sucting wet gel materials are graininess usually, be contemplated that also sucting wet gel material is macrostructure such as fiber, sheet or bar form.D. Ren Xuan fiber (" bottoming ") layer

A contained optional feature of absorbent article core of the present invention is near storing layer, common fibrous layer below storing layer.The fibrous layer of this lower floor is commonly referred to " bottoming " layer, because it provides substrate for the sucting wet gel material in the deposition storage layer in the process of producing absorbent article core.Really, be at sucting wet gel material under the situation of lamination or macrostructure such as fiber, sheet or strip, can not contain this fiber " bottoming " layer.But,, preferably contain this " bottoming " layer in the absorbent article core of the present invention usually owing to should provide the fluidic ability of some additional processing as length direction fast Absorption fluid by " bottoming " layer along pad.E. other optional feature

Absorbent article core of the present invention can comprise other optional feature that exists usually in the moisture absorption net.Rare gauze (scrim) of reinforcement for example, can be set in each layer of absorbent article core or between each layer.To such an extent as to rare gauze that this class is strengthened should have the interface barrier that such configuration can not form FLUID TRANSPORTATION, especially when between each layer at absorbent article core.If when having the structural integrity that occurs usually as the heat bonding result, absorbent structure of the present invention does not need this to strengthen rare gauze usually.But if use this rare gauze, they must have required contractility.

Contained another parts in the absorbent article core of the present invention, and preferably to be arranged on be odor control agent near main or the secondary fluid Distribution Layer or as its part.These odor control agents can be selected to cover color from the active carbon of active carbon or coating, and suitable zeolite or the clay material of optional adding has now found that it also is useful that sucting wet gel material combines with particular zeolite in the absorbent article core.These parts can any suitable form add, but usually with discrete, non-fibrous particulate forms adding.

Top flat is submissive, soft feel and non-stimulated to wearer's skin.Top flat also can have elastic performance, makes it extensible in one or two direction or its whole extension of some part of top flat.In addition, top flat is a liquid, allows liquid (as menstruation and/or urine) to see through its thickness easily.Suitable top flat can be made by many materials, as weaving or non-woven material; The thermoplastic film of polymeric material such as porous formed thermoplastic film, porous plastic film and hydroforming; And the rare gauze of thermoplasticity.Suitable weaving and non-woven material can by natural fiber (as wood or cotton fiber), synthetic fibers (as polymer fiber such as polyester, polypropylene or polyethylene fibre) or natural and synthetic fibers or two-/combination of many-component fibre makes.

The used preferred top flat of the present invention is selected from the nonwoven top flat and the porous formed film top flat of high loft usually.Porous formed film especially is preferred in the top flat, because they can see through bodily exudate, and does not absorb them, and liquid is returned and the trend of returning wet wearer's skin reduces.Therefore, the surface of the formed film that contacts with the wearer keeps dry, and therefore reduces health and is stain, for the wearer provides a more comfortable sensation.Suitable formed film is at USP3, is described in 929,135, USP4,324,246, USP4,342,314, USP4,463,045 and USP5,006,394.The porous formed film top flat of particularly preferred microcosmic is at USP4, done disclosure in 609,518 and USP4,629,643.The used preferred top flat of the present invention comprises the formed film of describing in above-mentioned one or more patent, and by TheProcter ﹠amp; (Cincinnati Ohio) sells with " DRI-WEAVE " in sanitary towel Gamble Company.

The present invention also considers not have homogeneous fluid passage to distribute, and only some top flat contains the top flat of fluid passage.To such an extent as to this class top flat has central authorities' liquid thoroughly of the fluid passage top flat of distribution like this usually, and periphery liquid thoroughly.

The surface towards the wearer of formed film top flat can be thereby that the hydrophilic flowing fluid ratio body surface that helps is not the hydrophilic top flat that sees through quickly.In a preferred embodiment, surfactant is joined in the polymeric material of formed film top flat, described in PCT publication number WO93/09741.In addition, can handle that it is become is hydrophilic with surfactant to the surface towards the wearer of top flat, as US4,950,254 is described.

Another kind of alternative plan is so-called hydridization top flat, and this top flat combines fibrous and membrane structure.The useful especially embodiment of this class hydridization top flat has been done disclosure in PCT publication number WO93/09744, WO93/11725 or WO93/11726.

When relating to top flat, can consider loose structure or single layer structure.Hydridization top flat above-mentioned is so a kind of multilamellar design, but also considers other multilamellar top flat, as the secondary top flat design of advocating peace.

Egative film prevents mainly that moisture absorption is got wet with the transudate that retains in the absorbent structure and contacts the article of absorbent product, as short underpants, medicated underpants, nightwear and underwear.Egative film is impenetrable liquid (as menstruation and/or urine) preferably, and is preferably made by thin plastic, although also can use the liquid-tight material of other flexibility.Term used herein " flexibility " refers to submissive, and the material of the general shape of easy and human body and profile phase applying.Egative film also can have elastic performance, makes it extensible in one or two direction.

Egative film extends through whole absorbent structure usually, can be by fold a part that extends on the top flat and form top flat along absorbent structure.Therefore, US4, the disclosed top flat configuration in 342,314 (the 16th hurdles, 47-62 is capable) can be issued to the situation that top flat carries out perforate need not selectivity.

Egative film can contain weaving or non-woven material, thin polymer film such as polyethylene or polyacrylic thermoplastic film, the lamination of this class material or the non-woven material of composite such as plated film.Egative film is the polyethylene film of the about 0.012mm of thickness (0.5 mil)～0.051mm (2.0 mil) preferably.

Exemplary polyethylene film by Clopay Corporation (Cincinnati, Ohio) trade mark of Sheng Chaning is P18-1401 and Ethyl Corporation, (Terre Haute, Indiana) trade mark of Sheng Chaning is XP-39385 to Visqueen Division.Egative film preferably carries out embossing and/or delustring to be handled so that the outward appearance that more resembles fabric to be provided.

Preferably, egative film is by being porous steam at least, but preferably air permeable provide breathability to absorbent device, but under the situation of the major function of not sacrificing egative film.Egative film can be a laminated material, as the combination of microporous membrane, non-woven material and/or porous formed film.Breathability (if desired) can be limited to the peripheral of egative film or it can be along whole egative film.The adaptability of articles for use

Term used herein " adaptability " comprises contractility, extensibility and combined feature thereof.Adaptability is often referred to the ability of size adjusting on one or two direction of sanitary towel.

Adaptability of the present invention can be by producing a series of ripples or pleat on perpendicular to the direction of the adaptable direction of product needed.For example, will be provided at the ability of extending transversely so that when using articles for use or hold the variation of the crotch portion width of article during use at the thin hygienic article that vertically has ripple or pleat.These ripples or pleat can also provide and enlarge or reduce the ability of articles for use width so that the routine that produces for the wearer of different crotch portion width wears the position.

The ability of adjusting to required degree can provide vertical or horizontal.When making absorbent device, but can come together to provide cooperative effect with it and the material of elastic stretch.Certainly, it also is possible using intrinsic material adaptability and the structure adaptability that is provided by ripple or pleat.

The a series of successive variation that the planar vertical direction of expression sheet material that term used herein " becomes undulatory or ripple " exists.Planar " vertical direction " is perpendicular to that planar direction.Although ripple is the continuous variation of vertical direction in the sheet material plane, but term used herein " pleat " or " pleating " refer to along the folding of concrete line or in other words, the unexpected variation that makes progress in the planar vertical direction of sheet material also can use a series of pleats to simulate ripple.

Particularly for thin articles for use, can on entire product, adopt to be called the method that the ring ingot rolls and to be provided as the required structure ripple of adaptability that obtains product.At least this class ring ingot in the high-speed production operation rolls really and need carefully select material by those of ordinary skills, if but consider the selection of above-mentioned material and required adaptability, it is no problem that this ring ingot rolls.Before combination single material being encircled that ingot rolls also is useful so that provide outside the deconditioning, and flexible and flexibility is than conventional products improved products.The ring ingot rolls has made more detailed description: US4 in following patent, and 107,364, US4,834,741, US5,156,793, US5,143,679, US5,167,897 and US5,354,400, how these patents provides different extensibility if also having been explained in detail.

It also is known that the ring ingot rolls, and also is to use easily for those of ordinary skills.Ripple can exist at the vertical and horizontal of absorbent device, still, has now developed the ripple technology so that the ripple of crosscut material traffic direction to be provided in the process of the producer goods.Therefore, although ripple technology only provides the ripple of vertical direction usually, can consider to encircle the ingot rolling technique in process of production so that the ripple of material traffic direction to be provided.

But term used herein " ripple or pleat " really finger ring ingot rolls or fretful result, and no matter in the production process be traffic direction at material, still uses this technology at the traffic direction perpendicular to material.

The required ripple or the degree of pleat (are limited by amplitude and frequency, can determine so that required adaptability to be provided at an easy rate by simple trial and error procedure.It depends on the thickness and the flexible combination of articles for use.Those of ordinary skills also will appreciate that the ripple that can provide identical or pleat obtaining adaptability in various degree, this depend on they whether once more part flatten.

For the articles for use with high degree of adaptability are provided to the wearer, the ripple that forms when keeping producing when the individual of articles for use disposes during all the other processes of producing and the packaging operation and before ripple being transported to the supply place of product and being fixed on the skin is necessary.This can by as product is stable or be frozen in situation its ripple or pleating and realize, by with the product of this state attached to hard substrate, on the adhesive guard member of using as separate paper or body and function adhesive.The adhesive that localized immobilization is used

Articles for use of the present invention described above are directly used on the skin of user.Particularly, sanitary towel is used in the fluid discharge district genital area on every side by general women's user.The term that the present invention uses " skin " not only relates to the concrete skin of user really, and comprises mucous tissue and the common hair that occurs at the genital area of sanitary towel's user.

For articles for use of the present invention being fixed on the skin of user, also be necessary at the adhesive (as being called the body and function adhesive) that on the specific region on the top flat of wearer's articles for use, provides localized immobilization to use.

Can consider the different designs of this aspect, thereby still preferred periphery along top flat provides the body and function adhesive to stay the zone line of the articles for use that do not have adhesive.Thereby this will the most suitably make things convenient for the top flat of liquid thoroughly that does not have adhesive above the placement of articles for use be placed on the body fluid release aperture near, to such an extent as to do not have possibility leak or the situation of overflowing under, the liquid of release is transported in the absorbent structure of absorbent device immediately.

But, the body and function adhesive is arranged on the circle of closure on the periphery of top flat and there is no need, but it can be arranged in the zone that increases progressively as point or discrete line, thereby the separation between the different fixing position provides additional comfortableness for the wearer of these class articles for use.

Even can use the acceptable any body and function adhesive of the wearer of articles for use of the present invention, particularly preferably be and follow following consideration item.The physics of body and function adhesive, rheology and adhesive property

Even use the body and function adhesive at human body skin hair and viscosity tissue, as pressure-sensitive adhesive, be understood that the most distinctive rheologic behavio(u)r of body and function adhesive compound, can only regard typical pressure-sensitive adhesive (PSA hereinafter referred to as) with great difficulty as according to this class material of discriminating.

In fact, known to the those of ordinary skill of adhesive area, the feature that PSA is different from the tool characteristic of other material that can temporarily cling article (as water) is its rheological parameters, particularly elastic modulus G ' along with the frequency change of the stress that is applied is very big.More specifically, when the frequency of the stress that is applied during from typical bonding frequency change to typical releasing bonding frequency, promptly during hereinafter described 1 radian per second to 100 radian per second, the size of the G ' of PSA can increase more than the several magnitude.

Therefore, can draw by under given frequency values, provide rheological parameters particularly the value of the G ' material that will plan to use to be defined as " adhesive " be unallowed.This may make the people misread, because under the situation that lacks other characteristic, may cause comprising the material that does not have actual value.Therefore, it is believed that and think that rheological properties must consider that item is a basis with kinetics.

This be not only applicable to elastic modulus G ', and ", therefore also be applicable to tan (δ)=G "/G ' that is applicable to viscous modulus G.Well-knownly be that not only the variation of G ' is bigger for typical PSA under the frequency of being considered, and G " variation bigger; G " may level off to G ', perhaps even bigger than G ', promptly tan (δ) approximately or even greater than 1, particularly removing under the agglutinating typical frequency.

Do not wish to accept the end of opinion, this can be interpreted as meaning that major part is used for removing agglutinating energy expenditure internal friction (causing that therefore it is not effective removing on the bonding), although should cause showing as very big cohesive force on the fact macroscopic view.

For the bonding condition that provides, promptly under the frequency of about 1 radian per second, the absolute value of elastic modelling quantity should be too not high, otherwise adhesive can be too hard, can not finally connect or be molded into it and expect on the agglutinating surface.Have lower G " absolute value in case have good cohesion be important, this is valuable especially for being applied directly on the human body, material keeps soft and can mildly be attached on the skin simultaneously.

At last, the glass transition temperature Tg that it will be recognized by those of ordinary skills PSA is the useful parameter that more comprehensively and at length defines the classification of useful PSA material.

As mentioned above, the material that is used as body and function adhesive of the present invention has rheological properties, and they are as measuring under 37 ℃ of reference temperatures of body temperature He under a series of frequencies.Have now found that, when being applied to the body and function adhesive on the articles for use, under lower frequency, forming the adhesive contact, and bonding takes place to remove under the speed of removing articles for use.This speed represents with frequency 100 radian per seconds, and has now found that the low frequency that forms adhesive bonds is on the order of magnitude of 1 radian per second.Therefore, the used frequency range of the present invention is 1～100 radian per second.Should satisfy following series of features:

A) percentage of the elastic modulus G in frequency range ' 37 changes and to be less than or equal to 150% of G ' 37 under 1 radian per second, preferably is lower than its 100%, and more preferably less than its 80%, preferred this variation is 10000Pa with the absolute value representation.This is satisfied by the body and function adhesive that exemplifies below, and as the G ' 37 of Promeon RG-63B under identical frequency range that quote in the prior art be changed to 331%, this is that the present invention is unacceptable.

B) " 37 percentage variation is not more than 10000Pa to viscous modulus G in frequency range, preferably is not more than 5000Pa, most preferably is not more than 1000Pa.

C) G ' 37/G in the frequency range of 1～100 radian per second at least " 37 ratios should be preferably 1 or greater than 1, are more preferably more than 1.6 or 1.6, most preferably be more than 3.3 or 3.3, preferably be no more than 50 simultaneously.

Should be noted in the discussion above that G ' and G under the applying frequency of getting 1 radian per second under 37 ℃ the temperature ".In the practical application of articles for use of the present invention, the variations in temperature of body and function adhesive is very big when the physical holding of the stock temperature of articles for use and use.As the temperature that stores near the warmer the stew can should approach 0 ℃ and be stored in the storeroom or the temperature in the bathroom that do not have heating but window winter up to 37 ℃.But, because articles for use of the present invention directly are applied on the skin and the wearer does not want to use too cold article usually, the actual temperature of body and function adhesive will reach very soon 37 ℃ or even before using by wearer's preheating.Therefore, it is believed that the most suitable selection adhesive bonds characteristic under body temperature.

As noted above, rheological charactristics is also relevant with the value of glass transition temperature Tg.For body and function adhesive of the present invention, Tg should preferably be lower than-15 ℃,, most preferably is lower than-25 ℃ more preferably less than-20 ℃.The preferred chemistry of body and function adhesive and compositions feature

For the top preferred rheology that satisfies the body and function adhesive and the needs of physical characteristic, can use following preparation standard in addition.It should be noted that the most compositions that is used as the body and function adhesive has gelationus basically structure, preferably glue.This comes from the following fact:

Key component is the material that at room temperature is liquid.

Macromole or polymers compositions are compared with less amount with plasticizer and are existed.In preferred embodiments, it forms the three-dimensional network that is formed by intermolecular physics or chemical bond.Useful especially secondary or physical bond is to contain those keys that exist in the system of inlay section thermal plastic elastic body.

More specifically, compositions contains:

A) 0.5～20%, the solubilized of preferred 5-15% weight or swell in macromolecular polymeric material in the plasticizer cited below or the mixture of this class material.As non-limiting instance, the macromolecular or polymer material of this class is natural and/or synthetic, as natural gum or derivant such as natural gum and gelatin, its derivant and alginate; Polyacrylic (polyacrilics); Polyvinyl alcohol; Polyethylene glycol oxide; Polyvinylpyrrolidone (PVP) or polyvinylether, its copolymer and derivant; Cellulose derivative; The block copolymer thermoplastic elastomer, preferably cinnamic block copolymer is more preferably styrene/ethylene-butylene/styrene (SEBS), styrene/isoprene/styrene (SIS) and the styrene/ethylene-propylene/styrene (SEPS) of hydrogenation level.

B) mixture of the plasticised mass of 51～99.5% weight or plasticised mass, it at room temperature is a liquid.As non-limiting instance, plasticizer can be water, various alcohol (as glycerol particularly), glycol, Polyethylene Glycol, liquid polybutene, natural or artificial oil such as vegetable oil, mineral oil or its combination.

C) tackifying resin of the weight of 0～600% macromolecule polyalcohol, its main scope are to adjust Tg, particularly based on the Tg of the system of synthetic polymer.

D) 0～10%, more preferably 0～5% weight is used to be convenient to agglomerative material with stable hydrophilic or hydrophobic liquid plasticizer.These can be used for the oily system, as C ₈～C ₂₂Fatty acid, its slaine and its polyoxy for derivant; Lanolin derivative; Silicon dioxide; Bentonite, montorillonite clay and derivant thereof, polyamide, wax or its mixture.

Also can contain every kind of consumption up to 10% the conventional additives that changes agent etc. for antiseptic, antioxidant, ultraviolet (UV) resistant agent, pigment, mineral filler, rheology known in the art.

When forming chemical crosslinking in the system, cross-linking agent can preferably exist with the amount up to 5% weight.Chemical crosslinking also can be by having different functional groups the mutual neutralization of polymer form, as the reaction between acid polyacrylic and the poly-polysaccharide.

The compositions of the body and function adhesive of gained is according to key component, and promptly the character of liquid plasticizer can be divided into three classes:

1) hydrophobic composition, the concurrent mixture of the oil of normally a kind of oil of plasticizer or plant or mineral sources wherein, polymer normally dissolves in or swells in the synthetic polymer in the oil, preferably elastomer.

2) mixed phase compositions, wherein hydrophobicity and hydrophilic component (may in plasticizer and polymer) form two or more separating mutually.In this case, emulsifier/surfactant preferably exists to form inconsistent alternate stable emulsion with suitable content.For body and function adhesive of the present invention, preferably to compare with hydrophilic component be main to hydrophobic components.

3) hydrophilic composition, normally water/glycerol/glycol etc. and/or its mixture of plasticizer wherein, and polymer phase is synthetic (as polyacrylic) or natural (as natural gum) source or its mixture.

What should emphasize is, knownly with medical domain different with prior art that quote is, hydrophilic compositions is not preferred, and hydrophobic and mixed phase compositions 1) and 2) be preferred in an application of the invention.

This part depends on technical reason, because the used many hydrophilic compositions of medical domain show too low elastic property and the cohesiveness useful to the present invention.Preferred other reason hydrophobic or the mixed phase compositions is that the present invention is applied to the probability that the sanitary towel field comprises that the body and function adhesive contacts with the liquid that will absorb especially.Because the liquid that will absorb all is moisture class usually, contacts and to cause a certain amount of aqueous body fluids suction body to stick with glue in the agent so stick with glue agent with hydrophilic body.

Such result is rheologic behavio(u)r and its function that changes the body and function adhesive, causes antihygienic outward appearance, and causes body fluid direct and contact skin in long time, and this is not that any disposable absorbent article of the present invention is needed usually.In addition, this also may constitute potential defective to user.Because some hydrophilic compositions may be many microorganisms even the good culture medium that comprises pathogen.

And hydrophilic body and function adhesive also can be thought of as cold and wet, and when using clean sanitary towel or oxter sweat-blocking pad, this can not meet the expectation of ordinary consumer.Other problem comes from and particularly contains water and have the trend that drying is fallen as the body and function adhesive of plasticizer, unless they are sealed to impermeable packing.

Absorbent device of the present invention can be by this area any method preparation commonly used.Adhesive applications can not caused big problem for those of ordinary skills to the top flat side of absorbent device, because it can provide by similar techniques, as being generally used for medicated underpants fixing glue stick.The gross area towards the wearer surface of the absorbent device that is covered by the body and function adhesive should not surpass 20%, preferably be no more than 10%.Preferably, adhesive is near the periphery of absorbent device, and membranaceous top flat (or when egative film is folded on the top flat), adhesive is preferably on liquid-tight that a part of film.

Body and function adhesive on the articles for use (common as medicated underpants fixing glue stick) needs protection before use.This protection need be by paper release liner such as siliconization or that surfactant was handled, and condition is that this paper is the good adherent surfaces that the body and function adhesive of special selection is used.

In principle, absorbent device of the present invention is bearing on the wearer by the body and function adhesive, and does not need extra supporter to fix.But, on backsheet side, provide a nonskid coating so that prevent that sanitary towel from shifting out original position gradually also is possible as sanitary towel.And, do not want even medicated underpants fixing glue stick is required for the present invention, thus neither be preferred, and they are not got rid of outside content of the present invention by strictness yet.

Embodiment 1

Use the KratonG-1651 of 9.9% weight, cinnamic styrene/ethylene-the butylene/styrene block copolymer that promptly contains 33% weight, and available from Shell Co., the Kaydol of 59.3% weight, a kind of paraffin mineral oil available from Witco Co. is prepared the used compositions based on oil of the present invention.

And compositions contains 301 parts of tackifying resin/100 part Kraton polymer.Tackifying resin is Escorez 5300, a kind of hydrogenant resin available from Exxon Co..

Use is available from the magnesium stearate of the Carlo Erba S.p.A gellant that helps as oil usefulness, and its consumption is 0.7% weight.

Add Irganox 1010, a kind of antioxidant available from Ciba-Geigy, its consumption is 0.3% weight.

Therefore, compositions finally has following percentage composition:

Kraton G-1651 9.9% weight

Kaydol 59.3% weight

Escorez 5,300 29.8% weight

Magnesium stearate 0.7% weight

Irganox 1,010 0.3% weight

In the time of 37 ℃, compositions table reveals following rheological properties:

A) elastic modelling quantity when 1 radian per second, G ' 37=6876Pa;

B) the ratio G ' 37/G of elastic modelling quantity and viscous modulus when 1 radian per second " 37=12.49,

Ratio G ' 37/G3 " the 37=7.01 of elastic modelling quantity and viscous modulus when 100 radian per seconds;

C) when 100 radian per seconds when G ' 37 and 1 radian per second the ratio of G ' 37 be 1.308.

Above-mentioned composition is judged as comfortable when being used on the skin responsive, hirsutism.Comparative Examples

Use the KratonG-1651 of 7.1% weight, a kind of styrene/ethylene-butylene/styrene block copolymer that contains 33% weight styrene, merge Co. in Shell, with the Kaydol of 41.9% weight, a kind of paraffin mineral oil available from Witco Co. is prepared the compositions based on Componotine oil.

And compositions contains 704 parts of tackifying resin/100 part Kraton polymer.Tackifying resin is Regalrez 3102, a kind of hydrocarbon resin available from Hercules Co..

Use is available from the magnesium stearate of the Carlo Erba S.p.A gellant that helps as oil usefulness, and its consumption is 0.7% weight.

Add Irganox 1010, a kind of antioxidant available from Ciba-Geigy, its consumption is 0.3% weight.

So compositions finally has following percentage composition:

Kraton G-1651 7.1% weight

Kaydol 41.9% weight

Regalrez 3,102 50.0% weight

Magnesium stearate 0.7% weight

Irganox 1,010 0.3% weight

In the time of 37 ℃, compositions table reveals following rheological property:

A) elastic modulus G ' 37=3059Pa when 1 radian per second;

B) ratio of elastic modelling quantity and viscous modulus when 1 radian per second, G ' 37/G " 37=2.53,

At the ratio of 100 radian per second amount elastic modelling quantity and viscous modulus, G ' 37/G " 37=0.74;

C) when 100 radian per seconds when G ' 37 and 1 radian per second the ratio of G ' 37 be 4.944.

Above-mentioned composition is judged as very uncomfortable when being used on the skin of forearm.It is unacceptable being administered on the skin of responsive hirsutism.

Claims (10)

1. a part sticks with glue agent and is fixed to disposable absorbent article on the wearer of described articles for use, these articles for use have a longitudinal axis and a transverse axis, said articles for use have a surface and the surface towards medicated clothing towards the wearer, described articles for use is characterized in that at described surface and the described absorbent article core that contains between the surface of medicated clothing towards the wearer:

Described articles for use are at the described adhesive that contains on wearer's surface to small part, and the topical adhesive that is used for described articles for use is fixed; And

Described articles for use are at least one direction, and preferred both direction can adapt to, and is limited by the described longitudinal axis and transverse axis.

2. the disposable absorbent article of claim 1, wherein said articles for use are into undulatory or pleating so that described adaptability is provided.

3. claim 1 or 2 disposable absorbent article, wherein

Described adhesive has an elastic modulus G ' 37 and a viscous modulus G under the temperature of 37 ℃ (100) " 37,

Select described adhesive having dynamic elasticity character, thereby be not more than 150% of under 1 radian per second G ' 37, preferably be not more than 10000Pa at the G ' under the frequency of 1 radian per second 37 with at the difference DELTA G ' 37 of the G ' under the frequency of 100 radian per seconds 37, and

Select described adhesive having dynamic adhesion properties, thereby " 37 are not more than 10000Pa, preferably are not more than 5000Pa at the difference DELTA G of the G under the frequency of 1 radian per second " 37 and under the frequency of 100 radian per seconds G " 37.

4. " 37 ratio is more than or equal to 1, is preferably greater than or equals 1.6, most preferably more than or equal to 3.3 for the articles for use of claim 2, wherein G ' 37/G in the frequency range of 1～100 radian per second.

5. each articles for use in the claim 1～4, wherein under the frequency of 1 radian per second, G ' 37 is less than 20000Pa, preferably less than 15000Pa, most preferably less than 5000Pa.

6. each articles for use in the claim 1～5, wherein, under the frequency of 1 radian per second, " 37 less than 15000Pa, preferably less than 10000Pa, most preferably less than 5000Pa for G.

7. each absorbent device in the claim 1～6, wherein said adhesive is the compositions of following material, contains:

51～99.5% weight in 20 ℃ of plasticized compounds that are in a liquid state or component;

0.5 the solubilized of～20% weight or swellable are in the polymer or the component of described plasticized compound or component;

Tackifying resin, its consumption are the described polymer or the component of 0～600% weight.

8. each absorbent device among the claim 1-7, wherein said adhesive is partially hydrophobic at least, and the described adhesive of preferred 80% weight is made of hydrophobic components, and most preferably all components of described adhesive is hydrophobic.

9. each articles for use among the claim 1-8, wherein said adhesive cover less than 20%, preferably less than 10% described towards the wearer surface.

10. each articles for use among the claim 1-9, but wherein said articles for use are contractile and elastic stretch.