CN1241948A - Adhesive for secure topical attachment to the skin and comfortable removal - Google Patents

Abstract

The present invention relates to topical adhesives for attachment to the skin. In particular the present invention relates to such topical adhesives which can be employed for attachment to the skin that needs to absorb humoral. The topical adhesive provides secure attachment and is pleasing to the skin upon application, yet causes no discomfort upon removal. This is achieved by selecting the chemical composition and rheological characteristics of the topical adhesives.

Description

The adhesive that secure topical attachment to skin and comfortable is removed

Invention field

The part that the present invention relates to be used for fixing on the skin sticks with glue agent (topical adhesives).The present invention be more particularly directed to this class part and stick with glue agent, they can be used for fixing on the skin part that needs absorb body fluids, in particular for bonding sanitary towel, scanties lining, adult incontinence products or sweat-blocking pad.The part sticks with glue agent and provides safe fixing and dermal sensation is comfortable when using, and can not cause uncomfortable when removing articles for use.Realize these purposes by chemical composition and the rheological properties of selecting the part to stick with glue agent.

Background technology

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

The present invention relates to absorb nature and stick with glue agent from the part that the absorbent device of health rather than the effusive body fluid of wound is used.For example, the sanitary towel or the scanties lining that are used for fixing genital area.Be worn on as the incontinence article of people's genital area or the sweat-blocking pad that is worn on axillary fossa and also be fit to use adhesive of the present invention.

This class part sticks with glue agent and done general disclosure in United States statutory invention registration H 1602 or WO 96/33683.The more details of adhesive has been done research in PCT application WO 95/16424.Disclosed in this document and had the hygienic article that sticks with glue agent along the part on wearer's side that whole periphery is administered to sanitary towel.The root problem that this document solves 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 that the labor part sticks with glue the rheology standard of agent.But this document does not almost relate to the painless removal problem of these class articles for use, because the rheology standard of describing comprises depilation (promptly removing hair) compositions, as the STREP MIELE (TM) that is sold by Laboratori Vaj S.p.A in Italy.The adhesive that the localized immobilization of mentioning in WO 95/16424 is used 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 local dynamic rheology feature that sticks with glue agent.

WO 96/13238 discloses the part that depends on frequency and has sticked with glue the agent model.But disclosed all measured values as on the 9th page, all are to carry out under-60 ℃～+ 120 ℃ temperature and under the actual frequency of 0.1～100 radian per second (rad/s).For the necessary data under the temperature that is applied (about 20 ℃, general bathroom, i.e. storage temperature), used Williams-Landel-Ferry (hereinafter claiming WLF) formula.

This WLF equation is an empirical formula, and only in specific scope effectively, can not be used to be extrapolated to temperature below the glass transition temperature that is lower than polymer adhesive as it, same WLF equation can not be used for based on the numerical value that obtains below the glass transition temperature.About the details of WLF equation and application thereof can find in following document: " Principles ofPolymer processing " (the Polymer Processing principle) of Z.Tadmor and C.G.Gogos, by John Wiley; " Viscoelastic Properties of Polymers " (viscoelastic properties of polymer) of Sons publication or J.D.Ferry is also by JohnWiley ﹠amp; Son publishes.Because this disappears from WO 96/13238 already, so can not assess the suitability of disclosed data.

European patent application EP-638 303 has disclosed uses the part to stick with glue agent so that make the side hoop remain on stand up position on the side hoop of sanitary towel.Switzerland publication number CH-643730 has disclosed the purposes of the sanitary towel with very long outer chamfered edge, has the part to stick with glue agent in four bights of outside so that just in time provide the part to stick with glue the agent zone in the outside in the hair growth district of pubis.These two applications all do not relate to adhesive compound.

Based on above-mentioned prior art, an object of the present invention is to provide be used for safety fixing and from the skin painless part of removing stick with glue agent.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 adhesive and skin temperature have the temperature difference.

Except above-mentioned purpose of the present invention, the part sticks with glue agent, and additional benefit is provided also is desirable to skin or useful chemical compound or the compositions of health usually as supply/dispersion.And the part that does not preferably influence the natural skin situation sticks with glue agent, as passing through ventilative or permeable steam or suction steam/antiperspirant.

Summary of the invention

The present invention is used for explaining on the disposable absorbent article with it and is used for the adhesive of localized immobilization to its wearer.These articles for use have a surface and the outer surface towards the wearer usually.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, as urine, feces, menstruation, antiperspirant and vagina Excreta.The part sticks with glue agent is fixed on wearer's the skin articles for use.

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.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.

For be provided for safe initial and long-time fixing and easily/painless part of removing sticks with glue agent, the relation of elastic modelling quantity and viscous modulus with and kinetic property be particular importance.

The part sticks with glue agent and have elastic modelling quantity under the temperature of 37 ℃ (100), is abbreviated as G ' 37, has viscous modulus under the temperature of 37 ℃ (100), is abbreviated as G " 37.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 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.

Part of the present invention sticks with glue agent and satisfies following condition.

G ' 37 (1 radian per second) in the scope of 1500-20000Pa, preferred 1500-15000Pa, most preferably 3000-10000Pa;

G " 37 (1 radian per seconds) in the scope of 100-15000Pa, preferred 100-10000Pa, most preferably 300-5000Pa;

" 37 (1 radian per seconds) are in the scope of 3-30 for G ' 37 (1 radian per second)/G;

Ratio

Be not less than 0.5, preferably in the scope of 0.7-3, more preferably in the scope of 1-1.8;

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;

At least G ' the 37/G in the frequency range of 1～100 radian per second " 37 ratio should be preferably 3.3 or bigger, and more preferably 5 or bigger, most preferably 10 or bigger, simultaneously at arbitrary place of frequency interval, be no more than about 50, preferred 30;

Rheological property also can be relevant with the value of glass transition temperature Tg.Stick with glue agent for part of the present invention, Tg should be more preferably less than-20 ℃, most preferably less than-25 ℃ preferably less than-15 ℃;

Rheological property is also relevant with specific heat capacity with the acceptance that the part sticks with glue agent.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;

Rheological property is also relevant with the specific heat conductance of adhesive with the acceptance that the part sticks with glue agent.Preferably the specific heat conductance should be low as far as possible, preferred 1-0.1W/m/K, most preferably 0.6-0.1W/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 part that disposable absorbent article uses and sticks with glue agent, 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 usually, 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 comprised 45%, preferred 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 0～50% of a composition weight, preferably 0～600% of polymerizable compound weight.Plasticized compound or component are preferably selected from water, alcohol (preferably glycerine), glycol, Polyethylene Glycol, liquid polybutadiene, oil or its combination.Polymerizable compound or component are preferably selected from block-copolymer-thermoplastic elastomer (TPE), styrene-block-copolymer and hydrogenant styrene-block-copolymer.

The adhesive that the detailed Description Of The Invention localized immobilization is used

Part of the present invention is sticked with glue agent directly uses on the skin.In concrete application, adhesive can be used for sanitary towel, and sanitary towel generally is used in the fluid discharge district genital area on every side by 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 the part to stick with glue agent.

For sanitary towel, can consider the different designs of this aspect, thereby still preferred periphery along top flat provides the part to stick with glue the zone line that agent stays the articles for use that do not have adhesive.Thereby this most suitably do not have above the placement of convenient and healthy towel the top flat zone of the liquid thoroughly of adhesive be placed on the body fluid release aperture near, to such an extent as under the situation that does not have the possibility leakage or overflow, the liquid of release is transported in the absorbent structure of absorbent device immediately.The part sticks with glue physics, rheology and the adhesive property of agent

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

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 (the water between two glass plates) 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 from typical bonding frequency change when typically peeling off 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 " topical adhesive " be unallowed.This may make the people misread, because under the situation that lacks other characteristic, will comprise the material that does not have actual value.Therefore, rheological properties must consider that item serves as that basis is necessary 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 being 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 ', and perhaps even bigger than G ', promptly tan (δ) is approximately or even greater than 1, particularly under the typical frequency of peeling off.

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

As mentioned above, the material that sticks with glue agent as part of the present invention has rheological properties, and they are under as 37 ℃ of reference temperatures of body temperature and measure under a series of frequencies.Have now found that, in articles for use such as sanitary towel, use the part when sticking with glue agent, under lower frequency, form the adhesive contact, and under the speed of removing articles for use occurrence record.This speed represents with the frequency of 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.

It is believed that the bonding characteristic of the most suitable selection adhesive under body temperature.Because articles for use of the present invention directly are applied on the skin, those of ordinary skills have the little specific heat adhesive compound of (as preferably less than 4J/g/K) with selecting, the actual temperature that the part sticks with glue agent will reach very soon 37 ℃ or even before using by wearer's preheating.

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." have lower absolute value so that it also is important having being applied to the valuable especially good bonding in sanitary towel field, material keeps soft and can mildly be bonded on the skin G 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 value 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 the local safety that sticks with glue agent to fix 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 to guarantee kinetic property with a kind of like this relation (that is, providing safety bonding and painless and remove easily) maintenance elasticity and viscous modulus.

At last, those of ordinary skills will appreciate that also glass transition temperature Tg, specific heat capacity and the thermal conductivity of adhesive compound are the useful parameters that the part that is limited with usefulness more comprehensively sticks with glue agent.

Should satisfy following feature:

G ' 37 (1 radian per second) in the scope of 1500-20000Pa, preferred 1500-15000Pa, most preferably 3000-10000Pa;

G " 37 (1 radian per seconds) in the scope of 100-15000Pa, preferred 100-10000Pa, most preferably 300-5000Pa;

" 37 (1 radian per seconds) are in the scope of 3-30 for G ' 37 (1 radian per second)/G;

Ratio

Be not less than 0.5, preferably in the scope of 0.7-3, more preferably in the scope of 1-1.8;

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;

At least G ' the 37/G in the frequency range of 1～100 radian per second " 37 ratio should be preferably 3.3 or bigger, and more preferably 5 or bigger, most preferably 10 or bigger, simultaneously at arbitrary place of frequency interval, be no more than about 50, preferred 30;

Rheological property also can be relevant with the value of glass transition temperature Tg.Stick with glue agent for part of the present invention, Tg should be more preferably less than-20 ℃, most preferably less than-25 ℃ preferably less than-15 ℃;

Rheological property is also relevant with concrete specific heat capacity with the acceptance that the part sticks with glue agent.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;

Rheological property is also relevant with the specific heat conductance of adhesive with the acceptance that the part sticks with glue agent.Preferably the specific heat conductance should be low as far as possible, is more preferably 1-0.1W/m/K, most preferably is 0.6-0.1W/m/K.The part sticks with glue the chemistry and the composition characteristic of agent

To satisfy above-mentioned rheology that the part sticks with glue agent and the part of physical characteristic needs sticks with glue the agent compositions in order providing, can to use following preparation standard in addition.It should be noted to have gelatinous basically structure, preferably gel as the local most compositions that sticks with glue agent.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 contains:

A) 0.5～20%, the solubilized of preferred 5-15% weight or swell in macromolecular polymer in the plasticizer cited below or the mixture of this class material.As non-limiting instance, that this class is macromolecular or polymer material 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) 45～99.5% weight, the plasticised mass of preferred 51～99.5% weight or the mixture of 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) 0～50% weight, the tackifying resin of the weight of preferred 0～600% macromolecule polyalcohol, its main scope is to adjust Tg, particularly based on the Tg of the system of synthetic polymer.

D) 0～10%, more preferably 0～5% weight is used for conveniently and the material of stable hydrophilic or hydrophobic liquid plasticizer gel or 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 part of gained sticks with glue the compositions of agent 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.Stick with glue agent for part 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 the present invention to be applied to the sanitary towel field especially comprise that the part sticks with glue the probability that agent contacts with the liquid that will absorb.Because the liquid that will absorb all is moisture class usually, contact and to cause a certain amount of body fluid suction part to stick with glue in the agent so stick with glue agent with hydrophilic part.

Such result changes local rheologic behavio(u)r and its function that sticks with glue agent, causes antihygienic outward appearance.

And hydrophilic part sticks with glue agent, and also to tend to be thought of as cold-peace wet, and it can not meet the expectation of ordinary consumer on being applied to people's skin the time.Other problem comes from and particularly contains water and stick with glue agent as the part of plasticizer and have the trend that drying is fallen, unless they are sealed to impermeable packing material.

The part sticks with glue using of agent

Can prepare absorbent device with this area any method commonly used, part of the present invention sticks with glue agent can be used for these articles for use.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 that is sticked with glue the absorbent device of agent covering by the part 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.

Part on the articles for use sticks with glue agent and preferably protects before use.This protection need be by paper release liner such as siliconization or that surfactant was handled, and condition is that this paper sticks with glue agent from selected part easily and peels off.

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

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

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

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.

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 part sticks with glue agent and is suitable for not having the distribution of monophasic fluid passage most, and only some top flat contains on 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.

Another kind of alternative plan is so-called hydridization top flat, and this top flat combines fibrous and membrane structure, and 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.

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 article core also can contain multilamellar, and fluid storage and distribution function are provided.

Absorbent article core be usually located at top flat below, and with its fluid communication.Absorbent article core can contain 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.

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 prepared as acrylic acid by polymerisable, undersaturated acidiferous monomer 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.

Be used in particular for implementing an embodiment of absorbent article core of the present invention, comprise 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.

Absorbent article core can comprise the optional feature that is present in usually in the moisture absorption net, as odor control agent, and particularly suitable zeolite.

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 made by thin plastic usually.

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 article core.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.

Preferably, egative film is by being porous steam at least, but preferably air permeable provide breathability to absorbent device.Egative film can be a laminated material, as the combination of microporous membrane and/or 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.

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., with the Kaydol of 59.3% weight, a kind of paraffin mineral oil available from Witco Co. is prepared the compositions based on oil that is used for sanitary towel 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) 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 in the Kaydol of Shell Co. and 41.9% weight, a kind of paraffin mineral oil available from Witco Co. is prepared the compositions based on contrast 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 (9)

1. the part that disposable absorbent article is fixed on the skin sticks with glue agent,

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:

G ' 37 (1 radian per second) in the scope of 1500-20000Pa, preferred 1500-15000Pa, most preferably 3000-10000Pa;

G " 37 (1 radian per seconds) in the scope of 100-15000Pa, preferred 100-10000Pa, most preferably 300-5000Pa;

" 37 (1 radian per seconds) are in the scope of 3-30 for G ' 37 (1 radian per second)/G;

Ratio

Be not less than 0.5, preferably in the scope of 0.7-3, more preferably in the scope of 1-1.8;

Perhaps 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 part of claim 1 sticks with glue agent, wherein in the frequency range of 1-100 radian per second G ' 37/G " 37 ratio is in the scope of 3.3-30.

3. claim 1 or 2 part stick with glue agent, contain:

45～99.5%, preferred 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 0～50% weight of described polymer or component, preferred 0～600% weight.

4. the part of claim 3 sticks with glue agent, 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 part sticks with glue agent among the claim 1-4, and wherein the described adhesive of 80% weight is made of hydrophobic components, and most preferably all components of described adhesive is hydrophobic.

6. each part sticks with glue agent among the claim 1-5, and 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 part sticks with glue agent among the claim 1-6, and 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 part sticks with glue agent among the claim 1-7, and the specific heat conductance of wherein said adhesive in the scope of 0.1-1W/m/K, most preferably is 0.1-0.6W/m/K preferably less than 1W/m/K.

9. each the part application of binding agent in sanitary towel or medicated underpants lining among the claim 1-8.