CN1241921A - Disposable absorbent article with side cuffs comprising an adhesive for secure topical attachment of the side cuffs to the skin of a wearer - Google Patents
Disposable absorbent article with side cuffs comprising an adhesive for secure topical attachment of the side cuffs to the skin of a wearer Download PDFInfo
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- CN1241921A CN1241921A CN 97180970 CN97180970A CN1241921A CN 1241921 A CN1241921 A CN 1241921A CN 97180970 CN97180970 CN 97180970 CN 97180970 A CN97180970 A CN 97180970A CN 1241921 A CN1241921 A CN 1241921A
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Abstract
The present invention relates to disposable absorbent articles, particularly sanitary napkins, pantiliners, adult incontinence products, or baby diapers. In particular the present invention relates to such disposable absorbent articles with side cuffs which are maintained in their in-use position by direct attachment to the skin of the wearer. The topical adhesive attachment of such side cuffs needs to be secure and pleasing upon application and during use of such articles, yet cause no discomfort upon removal of the article. This is achieved by the present invention selecting the rheological characteristics of adhesives for such articles.
Description
Invention field
The present invention relates to disposable absorbent article, particularly sanitary towel, scanties lining, adult incontinence products or baby diaper, it has the side hoop.The present invention be more particularly directed to have the side hoop disposable absorbent article of (side cuffs), these articles for use are by remaining on its use location on the skin that directly is fixed on the wearer.When using and between the operating period, it should be safe and pleasant that the part of these class articles for use sticks with glue agent fixing, thereby can not cause uncomfortable when removing articles for use.The present invention realizes these benefits by the rheological properties of the side hoop selecting these class articles for use and use.
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, these standards 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.The incontinence article that is worn on as people's genital area also is a 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.The articles for use that this class is used for directly being fixed on the skin have been done general disclosure at United States statutory invention registration H 1602 or WO 96/33683.The more details of these class articles for use has been done research in as PCT application WO 95/16424.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 WO 95/16424 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 the compositions of depilation (promptly removing hair), as the STREP MIELE (TM) that is sold by Laboratori Vaj S.p.A in Italy.The adhesive of the localized immobilization of mentioning in WO 95/16424 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.
WO 96/13238 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 John Wiley﹠amp; Son publishes.Because this disappears from WO 96/13238 already, so can not assess the suitability of disclosed data.
And this document and WO 95/16424 do not have disclosure to have the absorbent device of side hoop, and only relate to the articles for use that directly are fixed on the skin.
European patent application EP-638 303 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.But this document does not disclose any details that is used for the concrete adhesive of this content.Switzerland publication number CH-643730 has disclosed the purposes of the very long 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.
Based on above-mentioned prior art, an object of the present invention is to provide and be used to absorb from the wearer's body disposable absorbent article of effusive liquid naturally, these articles for use have the side hoop, and this side hoop safety is fixed on the wearer's skin when using and between the operating period.But the side hoop that this class is bonded on the health also needs painless removal.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.To be the adhesive used of localized immobilization side hoop cause cold or other unacceptable temperature sense using Shi Buhui further object of the present invention, although the temperature difference of adhesive and skin temperature.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.
Summary of the invention
The present invention relates to have the disposable absorbent article of side hoop, this side hoop has specified contact wearer's position.These articles for use have a surface and the outer surface towards the wearer usually, and the articles for use below being worn on medicated clothing, outer surface is also referred to as the surface towards medicated clothing.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.The adhesive to the small part at position that disposable absorbent article of the present invention is included in the specified contact wearer of side hoop is used for the part and sticks with glue the skin that agent is fixed to the side hoop wearer.
The labor of the precedence of the normal conditions that occur when being applied to of disposable absorbent article with side hoop removed these class articles for use shows that the characteristic that must satisfy very concrete adhesive is to realize required performance purpose.The characteristic of having considered in this case be describe material elastic performance elastic modelling quantity and the viscous modulus of the adhering performance of adhesive material is described.
The adhering performance of adhesive can be interpreted as representing the fixing rapidly and agglutinating ability of safety of adhesive.Elastic performance may be interpreted as " hardness " performance of expression adhesive.Its value also is important to good initial fixation.The combination that it is believed that them is the indication of required power when removing.The relation of elastic modelling quantity and viscous modulus is considered to which part of expression except that deenergizing and will being dissipated in the adhesive, and which part can be used for causing actual removing.
Satisfy the fixedly disposable absorbent article with side hoop of needs of initial safety in order to provide, the safety between the operating period is fixing and easy/painlessly remove, the relation of elastic modelling quantity and viscous modulus with and kinetic property be particular importance.
Adhesive has elastic modelling quantity under the temperature of 37 ℃ (100), be abbreviated as G ' 37, has viscous modulus under the temperature of 37 ℃ (100), is abbreviated as G " 37.Adhesive also has dynamic elasticity character, is defined as Δ G ' 37, and it is the difference of the G ' 37 under the frequency of G ' 37 under the frequency of 100 radian per seconds and 1 radian per second.Adhesive also has dynamic adhering performance, is defined as Δ G, and " 37, it is the difference of G " G under the frequency of 37 and 1 radian per second " 37 under the frequency of 100 radian per seconds.
Articles for use of the present invention comprise the topical adhesive that satisfies following condition.
O G ' 37 (1 radian per second) in the scope of 1500-20000Pa, preferred 1500-15000Pa, most preferably 3000-10000Pa;
O G " 37 (1 radian per seconds) in the scope of 100-15000Pa, preferred 100-10000Pa, most preferably 300-5000Pa;
O ratio G ' 37 (1 radian per second)/G " 37 (1 radian per seconds) in the scope of 2-50,3-30 preferably;
O ratio
Be not less than 0.5, preferably in the scope of 0.7-3, more preferably in the scope of 1-1.8;
O ratios delta G ' 37/G ' 37 (1 radian per second) is not more than 1.5, preferably is not more than 1, most preferably is not more than 0.8; Perhaps
Δ G ' 37 is not more than 10000Pa, preferably less than 5000Pa, most preferably less than 2000Pa; Perhaps both;
O is the G ' 37/G in the frequency range of 1～100 radian per second at least " 37 ratio should be preferably 2 or bigger, and more preferably 3.3 or bigger, simultaneously at arbitrary place of frequency interval, be no more than about 50, preferred 30;
The o rheological property also can be relevant with the value of glass transition temperature Tg.For body and function adhesive of the present invention (body adhesive), Tg should be more preferably less than-20 ℃, most preferably less than-25 ℃ preferably less than-15 ℃;
The acceptance of o rheological property and the disposable product that contains topical adhesive is also relevant with specific heat capacity.The preferably local specific heat capacity that sticks with glue agent is more preferably less than 3J/g/K, most preferably less than 2J/g/K less than 4J/g/K;
The acceptance of o rheological property and the disposable product that contains topical adhesive is also relevant with the specific heat conductance of adhesive.Preferably the specific heat conductance is preferably greater than 0.6W/m/K greater than 0.1W/m/K, most preferably greater than 1W/m/K.
If satisfy above-mentioned rheology condition, adhesive also satisfies as competent caking property conditions such as (remaining on the skin to prevent adhesive), and competent caking property is important and is conspicuous for those of ordinary skills the commerce application of this class adhesive.The adhesive compound that satisfies above-mentioned standard can be used as the topical adhesive that disposable absorbent article is used, and condition is that they also satisfy between the operating period and generally be used safely in common requirement on people's the skin after removing articles for use.
The comfort of sanitary appearance when contacting also is important, thus adhesive compound preferably clear or white and ice-cold, discomfort when preventing to use.
Above-mentioned rheology standard and other consider that item 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, and polymerizable compound or component are preferably selected from block-copolymer-thermoplastic elastomer (TPE), styrene-block-copolymer and hydrogenant styrene-block-copolymer simultaneously.
In particularly preferred embodiment of the present invention, adhesive covers the whole specified contact wearer's of side hoop position.If the side hoop is elastic (elasticated), also can use the present invention.
Detailed Description Of The Invention
The present invention relates to have the disposable absorbent article of side hoop.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 baby diaper.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.
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 USP 3,929, and 135, USP 4,324,246, USP4,342,314, be described among USP 4,463,045 and the USP 5,006,394.The porous formed film top flat of particularly preferred microcosmic is at USP 4,609,518 and USP 4,629,643 in done disclosure.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 the monophasic fluid passage and distributes, 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 WO 93/09741.In addition, can handle that it is become is hydrophilic with surfactant to the surface towards the wearer of top flat, as US 4,950,254 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 WO 93/09744, WO 93/11725 or WO 93/11726.
Top flat extends along whole absorbent structure usually, and stretch out with the coplanar zone of absorbent structure outside.Top flat can stretch and form preferred flank, side is surrounded the part or all of of the parts or the wing.
When relating to top flat, consider multiple structure or single layer structure.A kind of multilamellar design that hydridization top flat above-mentioned comes to this, but consider that also other multilamellar top flat is as the secondary top flat design of advocating peace.
Absorbent structure or absorbent article core can comprise following parts: (a) optional main fluid Distribution Layer, preferably with optional secondary fluid Distribution Layer; (b) fluid storage layer; (c) the optional fiber that stores below the layer (" bottoming " (dusting)) layer of being positioned at; And (d) other optional feature.A. master/secondary fluid Distribution Layer
An optional feature of absorbent structure of the present invention is main fluid Distribution Layer and secondary 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 is used for final assignment for this main Distribution Layer the FLUID TRANSPORTATION of collecting and gives the storage 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.Also be choose wantonly but preferred secondary fluid Distribution Layer be usually located at the following of main Distribution Layer and with main Distribution Layer fluid communication.The purpose of this secondary fluid Distribution Layer is to collect fluid from main Distribution Layer easily, and it is transported to following storage layer rapidly.This helps the fluid displacement of the storage layer of lower floor to make full use of.Fluid distribution layer can be made of any material that is generally used for this class Distribution Layer.Particularly, keep fibrous layer capillaceous between fiber (even moist) to can be used as Distribution Layer.B. 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 any hygroscopic material commonly used or its combination.It preferably comprises absorbent gelling formed material and suitable carriers, and the absorbent gelling formed material is commonly referred to " hydrogel ", " superabsorbent ", " hydrocolloid " material.
The absorbent gelling formed material 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 can even or non-homogeneous being dispersed in the suitable carriers.If carrier itself is moisture absorption, also can use these suitable carriers separately.
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 by polymerisable, undersaturated acidiferous monomer preparation well known in the art.
Suitable carriers comprises that routine is used for the material of absorbent structure, as natural, modification or synthetic fiber, particularly is the modification of fine hair and/or tissue paper form or the cellulose fibre of non-modification.Suitable carriers can be used together with sucting wet gel material, but also can be used alone or in combination carrier.Concerning sanitary towel/scanties lining, most preferably tissue paper or tissue paper lamination.
An embodiment of absorbent structure prepared in accordance with the present invention comprises tissue paper itself is folding and double-deck tissue paper lamination that form.These layers can be connected to each other.Sucting wet gel material or other optional material can be included between these layers.
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 compounds (as the polyacrylonitrile silk), polyvinyl acetate, insoluble polyvinyl alcohol, polyethylene, polypropylene, polyamide (as nylon), poly-vinegar, bicomponent fibre, tricomponent fibre and composition thereof etc.Preferably, fiber surface is hydrophilic or is processed into hydrophilic.Store layer and can comprise that also filler as perlite, kieselguhr, Vermiculitum etc. is to improve the stand-up of liquid.
If sucting wet gel material anisotropically is 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.C. Ren Xuan fiber (" bottoming ") layer
A contained optional feature of absorbent structure 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 structure.Really, be at sucting wet gel material under the situation of macrostructure such as fiber, sheet or strip, can not contain this fiber " bottoming " layer.But, should provide the fluidic ability of some additional processing as length direction fast Absorption fluid by " bottoming " layer along pad.D. other optional feature of absorbent structure
Absorbent structure of the present invention can comprise other optional feature that exists usually in the moisture absorption net.For example, in each layer of absorbent structure or between each layer enhanced rare gauze (scrim) can be set.To such an extent as to the enhanced rare gauze of this class should have the interface barrier that such configuration can not form FLUID TRANSPORTATION.If when having the structural integrity that occurs usually as the heat bonding result, concerning the absorbent structure of heat bonding, it is normally unwanted that this strengthens rare gauze.
Contained another parts in the absorbent structure 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.Optional active carbon or active carbon and other odor control agent that is coated with odor control agent, zeolite that described odor control agent is particularly suitable or the clay material of adding in the absorbent structure.These parts can any suitable form add, but add with discrete particulate forms usually.
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, 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 porous steam at least, but air permeable preferably provides breathability to absorbent device like this, 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.
And absorbent device of the present invention comprises side hoop (side cuffs)." side hoop " speech refers to the to have barrier component articles for use of (barrier means), described stop member can stretch out from the surface towards the wearer of articles for use.The peripheral part of their close absorbent devices, the particularly limit, longitudinal side of close articles for use.
The side hoop is well known in the art, and is widely used in diaper and sanitary towel.They are can be with articles for use in aggregates or separate with articles for use.For example, in the articles for use of top flat were arranged, top flat had extension or folding in the vertical side edge of articles for use, this extension or folding can be from extending towards the wearer towards wearer's surface.
When considering that this area is described and during commercial multiple variations that is used for the side hoop embodiment in diaper or the sanitary towel, there is no question about for the barriers function of side hoop improvement leakage.The side hoop can be impermeable, thoroughly liquid but breathable, hydrophobic, hydrophilic but be processed into hydrophobic or hydrophilic.But the barriers function of side hoop depends on them consumingly, and how to remain on its predetermined use location well also be known.The use location that intercepts hoop normally makes them extend towards the wearer from the surface towards the wearer of articles for use, to such an extent as to and remain on their contact wearers of this position.But, proved that now it is difficult holding them in this position during whole wearing.
For example, US 3,860,003 has disclosed elastic disposable absorbent article, wherein in the flank of the product of elastomeric element between top flat and egative film so that form the configuration of a ship shape, thereby flank forms a barriers along the edge of product, US 4,738,677 have described two types obstruct hoop.One cover intercepts the longitudinal extension of hoop at articles for use, and the waist hoop also is arranged on the front end of articles for use and tail end along horizontal expansion, and overlaps another and intercept on the hoop.Therefore, form a pouch by four eclipsed hoops.The most suitable being applied to of the present invention can certainly be applied to laterally intercept on the hoop on the hoop of side obstruct longitudinally.Recently, disclosed the tensile absorbent device with tensile barrier layer in WO94/02095, it also benefits from the present invention.
Side hoop on the baby diaper is also referred to as and intercepts hoop, and is known.Described intercepting hoop in the following files, they are US 3,776,233, US 4,695,278, US 4,704, and 115, US4,738,677, US 4,795,454, US 4,808, and 177, US 4,808,178, US 4,816, and 025, US 4,900,317, US 4,938,755, US 5,021, and 051, US 5,032,120, US5,085,654, EP-A-374,640 or EP-A-459,178.Should be noted that not should be mixed mutually with the lower limb hoop of using on side hoop/obstruct hoop and the diaper.The lower limb hoop has the function of the wearer's who encases diaper lower limb usually, and the side hoop is from extending to the wearer towards wearer's surface, normally in order to contact with wearer's skin.
The inventor does not recognize and attempts on diaper to provide the body and function adhesive to the side hoop.This may partly be because diaper is fixed on the wearer, thereby ratio is better fixing as the sanitary towel on the underwear that is fixed to the wearer.
In EP-638 303, illustrated self at first trial of adhesive side hoop to sanitary towel is provided.But it may be useful that this publication does not disclose which kind of adhesive of local application, therefore more general discussion body and function adhesive.
This general disclosure is not clearly stipulated the specific (special) requirements of the adhesive of the localized immobilization of side hoop.The present invention has proposed the bonds well of local application of side hoop and the agglutinating problem of painless removal really and so that the side hoop is remained on it side hoop has been connected to use location on the wearer's skin.
Side hoop of the present invention can be activated (promptly swelling) by the whole bag of tricks on wearer's surface.For example, they can be by elastification as this area is modal.When putting into arc, swell the profile of the cross section of the wearer's who the wearer is divided into left and right sides two halves genital area (usually as) to such an extent as to also can dispose side hoop side hoop like this.
If have specific benefits of the present invention, also can have only by the activatory side hoop of body and function adhesive.In fact, in this preferably designed, before being applied to articles for use on the wearer, the side hoop can not swell to the wearer on wearer's surface.When being used for articles for use such as sanitary towel on the underwear (normally by medicated underpants fixing glue stick), then underwear is pulled upwardly, these articles for use will be near the wearer, and contact wearer's genital area.
In this position, the specified contact wearer's of side hoop surface contact wearer, and because the side hoop is provided with the body and function adhesive, they will be bonded on the wearer.Then, when further wearing articles for use, when upwards drawing underwear, original tight contact that obtains alleviates to a certain extent, and the hoop of wearing simultaneously remains on its bond locations, thereby its required obstruct benefit is provided.
When drawing back underwear downwards, medicated underpants fixing glue stick is enough firmly to peel off the body and function adhesive on the side hoop from wearer's skin, make the side hoop be folded in once more sanitary towel on wearer's surface.
It should be understood that for those of ordinary skills the multiple design of known side hoop will need to adjust the quantity of body and function adhesive areas and consumption to be applied on the side hoop.But this design standard can need not made bigger effort by those of ordinary skills and just can be selected, and the simple trial of actual user that only needs articles for use under special situation is to adjust the design of articles for use preferably.
The adhesive that side hoop localized immobilization is used
Side hoop of the present invention directly is fixed on the skin of user.Term of the present invention " skin " not only refers to the concrete skin of user, and comprise usually as the viscosity tissue and the hair of the genital area existence of the user of sanitary towel.
For side hoop of the present invention is fixed on the skin of user, be necessary the adhesive that provides localized immobilization to use to some side hoop zone of the wearer who specifies the contact articles for use to be also referred to as the body and function adhesive.
Consider the multiple design of this respect, but preferred body sticks with glue the outermost edge setting of agent along the side hoop.This mentions the most suitable convenience with the side hoop, and holds them in this position.Like this, can prevent that body fluid from flowing out from the side edge of articles for use, and send in the absorbent structure of absorbent device, and the possibility of not leaking or overflowing.
But, there is no need the body and function adhesive to be arranged on the side hoop with continuous wire, but can the body and function adhesive be set with the zone of being interrupted such as point-like or discrete wire form, thereby the separation between the different fixing position (decoupling) provide additional comfortableness can for the wearer of these class articles for use.
In order to satisfy purpose of the present invention, should consider following content.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 ' and 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 comprise 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 be bound by theory, this can be interpreted as major part and be used for removing agglutinating energy expenditure binding agent (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.
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 using side hoop, under lower frequency, form the adhesive contact, and bonding takes place to remove under the speed of removing articles for use with body and function adhesive.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.
And 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, those of ordinary skills have little specific heat capacity with selecting (as preferably less than 4J/g/K, be more preferably less than 3J/g/K, most preferably less than 2J/g/K) adhesive compound, 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 bonding characteristic of the most suitable selection adhesive under body temperature.
For good bonding condition is provided, promptly under the frequency of 1 radian per second, the absolute value of elastic modelling quantity should be too not high, otherwise adhesive too hard and can not closely connect or be molded into it will adherent surface on." valuable especially good cohesive force also is important to G on the human body to being applied directly to so that have to have lower absolute value, and material keeps soft and can mildly be bonded on the skin simultaneously.
" 37 (1 radian per seconds) are important to ratio G ' 37 (1 radian per second)/G, to guarantee that these two values are equilibrated when being administered to disposable absorbent article on the skin.Simultaneously, in the frequency range of being considered, need the absolute change of restriction G ' 37.Therefore, should keep Δ G ' 37 (being G ' 37 (100 radian per second)-G ' 37 (1 radian per second)) less with the ratio of G ' 37 (1 radian per second), so that between the whole operating period or removing/keep side hoop safety to be fixed on the wearer when peeling off articles for use, and can not cause uncomfortable.This also can represent with absolute value by Δ G ' 37 is remained on below the particular value.
Importantly, ratio
" 37 (1 radian per seconds) need enough greatly so that the kinetic property with a kind of like this relation (that is, provide during use safety bonding and use the end of term to provide painless and remove easily) maintenance elasticity and viscous modulus to be provided G ' 37 (1 radian per second)-G.
At last, those of ordinary skills will appreciate that also glass transition temperature Tg, specific heat capacity and the specific heat conductance of adhesive compound are the useful parameters that is limited with the body and function adhesive of usefulness more comprehensively.
Should satisfy following feature:
O G ' 37 (1 radian per second) in the scope of 1500-2000Pa, preferred 1500-15000Pa, most preferably 3000-10000Pa;
O G " 37 (1 radian per seconds) in the scope of 100-15000Pa, preferred 100-10000Pa, most preferably 300-5000Pa;
O ratio G ' 37 (1 radian per second)/G " 37 (1 radian per seconds) in the scope of 2-50,3-30 preferably;
O ratio
Be not less than 0.5, preferably in the scope of 0.7-3, more preferably in the scope of 1-1.8;
O ratios delta G ' 37/G ' 37 (1 radian per second) is not more than 1.5, preferably is not more than 1, most preferably is not more than 0.8; Perhaps
Δ G ' 37 is not more than 10000Pa, preferably less than 5000Pa, most preferably less than 2000Pa; Perhaps above-mentioned both;
O is the G ' 37/G in the frequency range of 1～100 radian per second at least " 37 ratio should be preferably 2 or bigger, and more preferably 3.3 or bigger, simultaneously at arbitrary place of frequency interval, be no more than about 50, preferred 30;
The o rheological property also can be relevant with the value of glass transition temperature Tg.For body and function adhesive of the present invention, Tg should be more preferably less than-20 ℃, most preferably less than-25 ℃ preferably less than-15 ℃;
The acceptance of o rheological property and the disposable product that contains topical adhesive is also relevant with specific heat capacity.The preferably local specific heat capacity that sticks with glue agent is more preferably less than 3J/g/K, most preferably less than 2J/g/K less than 4J/g/K;
The acceptance of o rheological property and the disposable product that contains topical adhesive is also relevant with the specific heat conductance of adhesive.Preferably the specific heat conductance is preferably greater than 0.6W/m/K greater than 0.1W/m/K, most preferably greater than 1W/m/K.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 body and function adhesive compound of physical characteristic are provided, 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 plasticizer 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 normally 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 and its ether, Polyethylene Glycol, liquid polybutene, ester such as phthalic acid ester, adipate ester, stearate, cetylate, sebacate or myristinate, 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 be used to be convenient to and the gelling of stable hydrophilic or hydrophobic liquid plasticizer and the material of gel formation process.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 body fluid 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 does not meet the expectation of ordinary consumer.Other problem comes from this fact: particularly contain 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 side hoop of absorbent device, because it can provide by similar techniques, as being generally used for medicated underpants fixing glue stick.
Body and function adhesive on the side hoop of 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.On the other hand, especially concerning diaper, can reach this protection, but make that preferably the adhesive self on the side hoop is not folding by articles for use self are folded.
In principle, absorbent device of the present invention is bearing on the wearer by the common components that can be applicable to articles for use, as the medicated underpants fixing glue stick and/or the wing concerning sanitary towel, gusset spare concerning diaper (sideclosure) and adhesive or mechanical adhesive tape (mechanical tape).In particularly preferred embodiments, sanitary towel or scanties lining have the wing, gusset spare or flank, they are to form by the part of top flat and egative film being stretched out the side of absorbent article core and being connected with each other in the outside of absorbent article core, as EP-A-130 848 or EP-A-134 086 disclosed content.
Provide a nonskid coating and shift out original position gradually so that prevent sanitary towel on the backsheet side as sanitary towel, it also is possible that the body and function adhesive on the while side hoop provides additional support for sanitary towel so that be fixed in due position.
Embodiment 1
Use the Kraton G-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) viscous modulus when 1 radian per second, G " 37=5505Pa;
C) ratio of elastic modelling quantity and viscous modulus when 1 radian per second, G ' 37/G " 37=12.49;
D) ratio
＝1.22；
E) ratios delta G ' 37/G ' 37 (1 radian per second) is 0.308, Δ G ' 37=2124Pa.
Above-mentioned composition is judged as comfortable when being used on the skin responsive, hirsutism.Comparative Examples
Use the Kraton G-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 modelling quantity when 1 radian per second, G ' 37=3059Pa;
B) viscous modulus when 1 radian per second, G " 37=1208Pa;
C) ratio of elastic modelling quantity and viscous modulus when 1 radian per second, G ' 37/G " 37=2.53;
D) ratio
＝-2.87；
E) ratios delta G ' 37/G ' 37 (1 radian per second) is 3.944, Δ G ' 37=12064.7Pa.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, said articles for use have a surface and the surface towards medicated clothing towards the wearer, described articles for use are at described surface and the described absorbent article core that contains between the surface of medicated clothing towards the wearer, described articles for use also comprise the side hoop with specified contact wearer zone, it is characterized in that:
Described articles for use contain adhesive to small part on the specified contact wearer zone described side hoop,
Described adhesive has an elastic modulus G ' 37 and a viscous modulus G under the temperature of 37 ℃ (100) " 37,
Select described adhesive to have following character:
O G ' 37 (1 radian per second) in the scope of 1500-20000Pa, preferred 1500-15000Pa, most preferably 3000-10000Pa;
O G " 37 (1 radian per seconds) in the scope of 100-15000Pa, preferred 100-10000Pa, most preferably 300-5000Pa;
O ratio G ' 37 (1 radian per second)/G " 37 (1 radian per seconds) in the scope of 2-50,3-30 preferably;
O ratio
Be not less than 0.5, preferably in the scope of 0.7-3, more preferably in the scope of 1-1.8;
O or G ' 37 (100 radian per second)-G ' 37 (1 radian per second) is not more than 10000Pa, preferably less than 5000Pa, is more preferably less than 2000Pa;
Perhaps ratio (G ' 37 (100 radian per second)-G ' 37 (1 radian per second))/G ' 37 (1 radian per second) is not more than 1.5, preferably is not more than 1, most preferably is not more than 0.8; Perhaps both combinations.
2. the disposable absorbent article of claim 1, wherein G ' 37/G in the frequency range of 1-100 radian per second " 37 ratio in the scope of 2-50, preferred 3.3-30.
3. claim 1 or 2 disposable absorbent article, 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 polymerizable compound or the component of 0～600% weight.
4. the absorbent device of claim 3, wherein:
Described plasticized compound or component are selected from water, alcohol, glycol, oil or its combination; And
Described polymerizable compound or component are selected from block-copolymer-thermoplastic elastomer (TPE), styrene-block-copolymer or hydrogenant styrene-block-copolymer.
5. each absorbent device among the claim 1-4, wherein the described adhesive of 80% weight is made of hydrophobic components, and most preferably all components of described adhesive is hydrophobic.
6. each absorbent device among the claim 1-5, the glass transition temperature Tg of wherein said adhesive is more preferably less than-20 ℃, most preferably less than-25 ℃ less than-15 ℃.
7. each absorbent device among the claim 1-6, the specific heat capacity of wherein said adhesive is more preferably less than 3J/g/K less than 4J/g/K, most preferably less than 2J/g/K.
8. each absorbent device among the claim 1-7, the specific heat conductance of wherein said adhesive is preferably greater than 0.6W/m/K greater than 0.1W/m/K, most preferably greater than 1W/m/K.
9. each articles for use among the claim 1-8, wherein said adhesive cover on whole specified contact wearer's the zone of described side hoop.
10. each articles for use among the claim 1-9, wherein said side hoop is elastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97180970 CN1241921A (en) | 1996-12-23 | 1997-12-22 | Disposable absorbent article with side cuffs comprising an adhesive for secure topical attachment of the side cuffs to the skin of a wearer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96120739.6 | 1996-12-23 | ||
| EP97110731.3 | 1997-07-01 | ||
| CN 97180970 CN1241921A (en) | 1996-12-23 | 1997-12-22 | Disposable absorbent article with side cuffs comprising an adhesive for secure topical attachment of the side cuffs to the skin of a wearer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1241921A true CN1241921A (en) | 2000-01-19 |
Family
ID=5177998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97180970 Pending CN1241921A (en) | 1996-12-23 | 1997-12-22 | Disposable absorbent article with side cuffs comprising an adhesive for secure topical attachment of the side cuffs to the skin of a wearer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1241921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10475010B2 (en) | 2008-01-10 | 2019-11-12 | Microsoft Technology Licensing, Llc | Federated entertainment access service |
-
1997
- 1997-12-22 CN CN 97180970 patent/CN1241921A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10475010B2 (en) | 2008-01-10 | 2019-11-12 | Microsoft Technology Licensing, Llc | Federated entertainment access service |
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