CN1241928A - Disposable absorbent article for secure topical adhesive attachment to the skin of a wearer - Google Patents
Disposable absorbent article for secure topical adhesive attachment to the skin of a wearer Download PDFInfo
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- CN1241928A CN1241928A CN 97180979 CN97180979A CN1241928A CN 1241928 A CN1241928 A CN 1241928A CN 97180979 CN97180979 CN 97180979 CN 97180979 A CN97180979 A CN 97180979A CN 1241928 A CN1241928 A CN 1241928A
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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. The topical adhesive attachment of such articles 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 selecting the chemical composition and rheological characteristics of the topical adhesives.
Description
Invention field
The present invention relates to disposable absorbent article, especially sanitary towel, scanties lining, adult incontinence products or Sweat-absorbing cushion.The present invention be more particularly directed to this kind disposable absorbent device, they directly are fixed on the wearer needs on the skin part of absorb body fluids.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 adhesive selecting these class articles for use and use.
Background technology
The general prior art that is administered to the disposable absorbent article field on wearer's local skin is especially developed in Band-aid, adhesive plaster (plaster) and binder field.But these articles for use usually with in case of emergency, for example wound occurred in the wearer's skin, need to absorb under the situation of the body fluid that wound discharges.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-absorbing cushion that is worn on axillary fossa also is theme of the present invention.
The common growth that these class articles for use are used for the wearer has the skin part of the hair of quite big quantity, thereby the requirement of removing 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 how safety is fixed on the skin, mentions simultaneously and uses the back the wearer not being caused the problem of separating 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 the compositions of commercially available depilation (promptly removing hair), as the STREP MIELE (TM) that is sold by Laboratori VajS.p.A in Italy.The localized immobilization of mentioning in WO95/16424 sticks with glue agent and 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 measurements 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 WO96/13238 already, so can not assess the suitability of disclosed data.
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 have outer chamfered edge purposes of very long sanitary towel of (chamfered outer edges), 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 disposable absorbent article, these articles for use are fixed to safely when using and between the operating period and are used on the wearer's skin absorbing from the effusive naturally liquid of wearer's body.But these class articles for use that are fixed on the health also need and can painlessly remove.Another 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 cause cold or other unacceptable temperature sense using Shi Buhui further object of the present invention, although there are the temperature difference in 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.
The present invention is 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, concerning the articles for use that are worn on medicated clothing inside, this 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.Disposable absorbent article of the present invention is included in its adhesive at least a portion on wearer's surface and is used to stick with glue agent with the skin of articles for use localized immobilization to the wearer.
The labor of the precedence of the normal conditions that occur when being applied to of disposable absorbent article removed these class articles for use has shown the characteristic that must satisfy concrete adhesive to realize required performance purpose, and the safety when particularly using is fixed, the safety between the operating period is fixed and last painless removal.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.Power required when removing has been indicated in the combination that it is believed that them.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 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, " 37; 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; be defined as Δ G " 37 that are defined as Δ G, 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 1500-2000Pa, 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 G ' 37 (1 radian per second)/G " ratio of 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 concrete 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 will satisfy 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 the outward appearance of health 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% polymeric compounds or component and a kind of tackifying resin of solvable or swellable in plasticized compound or component, 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 polymeric compounds or component are preferably selected from block-copolymer-thermoplastic elastomer (TPE), styrene-block-copolymer and hydrogenant styrene-block-copolymer simultaneously.
Detailed Description Of The Invention
The present invention relates to 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.
In a preferred embodiment, 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 USP3, is described in 929,135, USP4,324,246, USP4,342,314, USP4,463,045 and USP5,006,394.Particularly preferred many micropores formed film top flat 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 The Procter ﹠amp; (Cincinnati Ohio) sells with " DRI-WEAVE " in sanitary towel Gamble Company.
The present invention has considered that also the fluid passage is not a uniform distribution, 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 dignity 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 (hybrid topsheets), 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, multiple structure or single layer structure have also been considered.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 top flat below, with top flat be 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 direction by the conveying of main Distribution Layer, and carries out along the length and the width of absorbent product.Also 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 to make full use of the fluid displacement of the storage layer of lower floor.Fluid distribution layer can be made of any material that is generally used for this class Distribution Layer.Particularly, kept fibrous layer capillaceous between fiber (even moist time) 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 only use this 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 fibers, 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 hardened cellulose fibre.Also can use synthetic fibers, comprise the synthetic fibers of making by following material: cellulose acetate, polyvinyl fluoride, Vingon, acrylic compounds (as Orlon), 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 deposition sucting wet gel material in storing layer in the process of producing absorbent structure.In fact, 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
Absorbent structure of the present invention can comprise other optional feature that exists usually in the moisture absorption net.Rare gauze (reinforcingscrim) of reinforcement for example, can be set in each layer of absorbent structure 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.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 composition 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 compositions can any suitable form add, but add with discrete particulate forms usually.
The used preferred abnormal smells from the patient control system of the present invention comprises following combination: i) silicon dioxide, AGM and zeolite, and preferred ratio is 5: 1: 1～1: 1: 5, most preferably is 3: 1: 1～1: 1: 3, ii) zeolite, active carbon and AGM; Iii) silicon dioxide and AGM, preferred ratio is 5: 1～1: 5, is more preferably 3: 1～1: 3, iv) zeolite and AGM; V) silicon dioxide and zeolite, preferred ratio is 1: 5～5: 1, is more preferably 1: 3～3: 1; Vi) chelating agen, particularly edetate; And vii) chelating agen and abnormal smells from the patient control system i)～v) in any combination, preferred ratio is 1: 10～10: 1, is more preferably 1: 5～5: 1, most preferably is 1: 3～3: 1.
According to the present invention, the consumption that joins the abnormal smells from the patient control system of absorbent device can be definite by those of ordinary skills easily, and depend on the desired use of absorbent device, and consider the size of absorbent device.Absorbent device contains 5～400gm usually
-2, more preferably 100～300gm
-2, 150～250gm most preferably
-2Quantitative described abnormal smells from the patient control system.For example, sanitary towel or scanties lining can contain 0.25～5g, preferred 0.4～3g, the described abnormal smells from the patient control system of 0.5～2.5g most preferably.
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 obtain under selectivity carries out perforate to top flat the situation need not.
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) producing the trade mark is P18-1401 and Ethyl Corporation, (Terre Haute, Indiana) produce the trade mark 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 will be 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 used suitable ventilative top flat of the present invention can be selected from all breathable backsheets as known in the art.In principle, two types breathable backsheet is arranged, promptly gas-pervious and liquid-tight monolayer breathable backsheet and have two-layer at least egative film lamination, this two-layer combining provides breathability and opaque liquid.The term " liquid-tight " that the present invention is used for breathable backsheet only relates to prevention liquid from the effusive barrier of articles for use.In principle, do not think and to enter fluid removal in the articles for use by breathable backsheet outside this term.
The used suitable monolayer breathable backsheet of the present invention comprises those as describing those in GBA2184389, GBA2184390, GBA2184391, US4591523, US3989867, US3156242 and EP application number 95120653.1.
Suitable bilayer that the present invention is used or multi-layered gas-permeable egative film comprise those that those are exemplified in US3881489, US4341216, US4713068, US4818600, EP0203821, EP0710471, EP0710472, European Patent Application No. 95120647.3,95120652.3,95120653.1 and 96830097.0.
The egative film that satisfies defined requirement in European Patent Application No. 96830343.8 is particularly preferred, and more preferably wherein absorbent device generally also satisfies wherein described requirement.The adhesive that localized immobilization is used
Articles for use of the present invention described above are directly to use 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 on the specific region on the top flat of wearer's articles for use, providing adhesive to be used for localized immobilization (as being called the body and function adhesive).
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 placement of articles for use do not have above making the top flat of liquid thoroughly of adhesive be placed on the body fluid release aperture near, to such an extent as to the liquid that discharges is transported in the absorbent structure of absorbent device immediately, do not have the probability of leaking or overflowing.
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, separates between the different fixing position thereby make, and additional comfortableness is provided 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 muciparous 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 know under fixed frequency values, not allow to limit the material of desire as " body and function adhesive " by providing rheological parameters, particularly G ' value.This may make the people misread, because under the situation that lacks other characteristic, may comprise the material that does not have practical 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 remove under the agglutinating frequency typical.
Do not wish to be bound by theory, this can be interpreted as meaning that major part is used for removing agglutinating energy expenditure internal friction (therefore effectively do not cause and remove 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 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.
And should be noted in the discussion above that G ' and G under the applying frequency of measuring 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 is stored 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 bonding 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/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 disposable absorbent article 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
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.
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 1500-20000Pa, 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 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 the contains topical adhesive also specific heat capacity with concrete is relevant.The preferably local concrete 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 chemistry of body and function adhesive and compositions feature
For the above-mentioned rheology that satisfies the body and function adhesive and the body and function adhesive of physical characteristic needs 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 fluent material.
-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 usually:
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 gel of stable hydrophilic or hydrophobic liquid plasticizer or the material of gelation.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 that is used for 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 to be applied to especially comprise the probability that the body and function adhesive contacts with the liquid that will absorb in the application of the present invention in sanitary towel field.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-absorbing cushion, 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, but they are not got rid of outside content of the present invention by strictness yet.
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) the ratio G ' 37/G " 37=12.49 of elastic modelling quantity and viscous modulus when 1 radian per second;
D) ratio
＝1.22；
E) ratio/Δ 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) the ratio G ' 37/G " 37=2.53 of elastic modelling quantity and viscous modulus when 1 radian per second;
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 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,
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 1500-2000Pa, 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 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 polymeric compounds or the component of described plasticized compound or component;
Tackifying resin, its consumption are the described polymeric compounds or the component of 0～600% weight.
4. the disposable absorbent article of claim 3, wherein:
Described plasticized compound or component are selected from water, alcohol, glycol, oil or its combination; And
Described polymeric compounds or component are selected from block-copolymer-thermoplastic elastomer (TPE), styrene-block-copolymer or hydrogenant styrene-block-copolymer.
5. each disposable absorbent article 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 disposable absorbent article 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 disposable absorbent article among the claim 1-6, the specific heat capacity of wherein said adhesive is less than 4J/g/K, preferably less than 3J/g/K, most preferably less than 2J/g/K.
8. each disposable absorbent article 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 disposable absorbent article among the claim 1-8, wherein said adhesive cover less than 20%, preferably less than 10% described towards the wearer surface.
10. each disposable absorbent article among the claim 1-9, it is sanitary towel or scanties lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97180979 CN1241928A (en) | 1996-12-23 | 1997-12-22 | Disposable absorbent article for secure topical adhesive attachment to the skin of a wearer |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96120738.8 | 1996-12-23 | ||
| EP96120741.2 | 1996-12-23 | ||
| EP97110730.5 | 1997-07-01 | ||
| CN 97180979 CN1241928A (en) | 1996-12-23 | 1997-12-22 | Disposable absorbent article for secure topical adhesive attachment to the skin of a wearer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1241928A true CN1241928A (en) | 2000-01-19 |
Family
ID=5178007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97180979 Pending CN1241928A (en) | 1996-12-23 | 1997-12-22 | Disposable absorbent article for secure topical adhesive attachment to the skin of a wearer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1241928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753531A (en) * | 2017-06-30 | 2020-02-04 | T.J.史密夫及内修有限公司 | Spacer layer for wound dressing |
-
1997
- 1997-12-22 CN CN 97180979 patent/CN1241928A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753531A (en) * | 2017-06-30 | 2020-02-04 | T.J.史密夫及内修有限公司 | Spacer layer for wound dressing |
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