• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to disposable absorbent products, in particular sanitary napkins, panty liners, adult incontinence products or sweat pads. In particular, the present invention relates to such disposable absorbent articles as are worn by direct attachment to the wearer's skin in areas where absorption of body fluid is desired.
    公开号:KR20000069674A
    申请号:KR1019997005714
    申请日:1997-12-22
    公开日:2000-11-25
    发明作者:코르차니이탈로；로마노마리오
    申请人:데이비드 엠 모이어；더 프록터 앤드 갬블 캄파니；
    IPC主号:
    专利说明:

    Disposable absorbent products that adhere to the wearer's skin with topical adhesives {DISPOSABLE ABSORBENT ARTICLE FOR TOPICAL ADHESIVE ATTACHMENT TO THE SKIN OF A WEARER}
    Prior art in the field of disposable absorbent products for topical application to the wearer's skin has been developed in particular in the fields of disposable bands, plasters and bandages. However, these products are usually applied in emergencies where the skin of the wearer is cut and trying to absorb the fluids secreted from the wound. In this case, the performance aspects of absorbent products such as comfort and ease of use and application, pain-free removal and separation are neglected according to criteria such as wound sterility, maintenance of treatment, mechanical protection. In addition, such wound covering absorbent products are mainly used in areas of the skin where hair removal is possible or little or no growth of hair is present prior to application of the absorbent product.
    The present invention does not relate to absorbent articles for wound coating, but to absorbent articles for body fluid absorption which are naturally secreted from the body without a wound. Such products are for example sanitary napkins or pantyliners used in the genital area. In addition, for example, incontinence devices worn in the genital area or sweat pads worn on the human armpit are also subjects of the present invention.
    The product is applied to the wearer's skin in areas where there is typically a significant amount of hair growth, in which easy and painless removal of the product is the most important criterion. Such products are generally disclosed in U.S. Law No. H1602 or WO 96/33683, which discloses the invention. Some of the more detailed descriptions of these products are given in WO 95/16424. This document discloses a sanitary napkin in which an adhesive is applied along the entire circumference of the sanitary napkin's wearer facing surface. The problem of this document primarily addresses the problem of safe attachment to the skin, but also of the need to remove the product after use without causing severe pain to the wearer.
    International Publication No. WO 95/16424 discloses a more detailed analysis of the criteria for body adhesives in terms of rheological criteria. However, the rheological criteria taught include commercially available hair loss (ie, hair removal) compositions, such as STREP MIELE®, available from Laboratori Vaj SpA, Italy. The literature rarely considers the problem of removing the product painlessly. Topical adhesives mentioned in WO 95/16424 also include current pressure sensitive adhesives used to attach sanitary napkins to undergarments. In addition, the document only confirms the static rheological properties of the body adhesive and does not mention its dynamic rheological behavior.
    International Patent Publication No. WO 96/13238 discloses a body adhesive model that is frequency dependent. However, for example, all measurements disclosed on page 9 are performed at temperatures between -60 and + 120 ° C. and actual frequencies between 0.1 and 100 rad / sec. The Williams-Landel-Ferry (hereinafter WLF) equation was used to obtain the required data at the application temperature (typical bathroom, ie storage temperature of about 20 ° C).
    These WLF equations are experimental and valid only at certain limits and therefore cannot be used to extrapolate to temperatures below the glass transition temperature of the polymeric adhesive and also WLF cannot be used based on values obtained below the glass transition temperature. A detailed description of the WLF equation and its applicability can be found in Z. Tadmor and CG Gogos, "Principles of Polymer processing", published by John Wiley & Sons, or JD Ferry. " Viscoelastic Properties of Polymers, "published by John Wiley & Sons. This is not described in WO 96/13238, so the applicability of the disclosed data cannot be evaluated.
    EP 638 303 discloses the use of a body adhesive on the side cuff of a sanitary napkin to hold the cuff in an upright position. Swiss Patent No. CH-643730 discloses the use of very long sanitary napkins with rounded outer edges in which body adhesive is applied at the four corners of the outer edge to provide a body adhesive region sufficiently outside of the hair growth region.
    Based on the foregoing in the prior art, it is an object of the present invention to provide a disposable absorbent product for the absorption of body fluids attached to the wearer's skin and naturally secreted from the wearer's body, which product is removed without the pain of the absorbent product. . Still another object of the present invention is to ensure that the absorbent product is removed such that no residue of adhesive is present on the wearer's hair or skin. It is another object of the present invention to provide a disposable absorbent article that is worn very close to the wearer's body fluid secretion area to minimize or reduce the loss of liquid out of the absorbent article. In the case of disposable absorbent products worn in the crotch region of the wearer, this will improve the safety of contamination around the skin and clothing.
    In addition to the above object of the present invention, sanitary napkin pantyliners and sanitary articles provide an odor seal that prevents the odor of the absorbed body fluid or the odor formed from the absorbed body fluid from exiting the absorbent product by applying it to the skin of the wearer. It is also desirable to reduce or even eliminate odors emanating from the.
    Summary of the Invention
    The present invention relates to an absorbent article for attaching a topical adhesive to a wearer of a disposable absorbent article. Absorbent products usually have a wearer facing surface and an outward surface, also referred to as a garment facing surface, in view of the product being worn inside the garment. The article includes an absorbent core structure between the wearer facing surface and the garment facing surface to absorb body fluids naturally secreted from the wearer. The disposable absorbent article according to the present invention comprises an adhesive for topically adhesive attachment of the article to the wearer's skin on at least a portion of the wearer's opposing face.
    This adhesive is characterized in particular by having an elastic modulus at 37 ° C. (100 ° F.) abbreviated as G ′ 37 and a viscous modulus at 37 ° C. (100 ° F.) abbreviated as G ″ 37. The adhesive is also 100 rad / sec. or less G difference "37 and 1rad / sec G in frequency, between 37 ΔG than 150% of the" 37 is G at 1rad / sec frequency '37, preferably at least 80% of the frequency, less preferably 10000Pa than The adhesive is additionally selected to have a kinetic elastic behavior that is less than. The adhesive additionally has a difference ΔG ″ 37 between G ″ 37 at 100 rad / sec frequency and G ″ 37 at 1 rad / sec frequency of 10000 Pa or less, preferably 5000 Pa or less, Most preferably selected to have a kinetic viscous behavior to be less than or equal to 1000 Pa.
    Products according to the invention is 1 to 100rad / the entire frequency range of sec G '37 / G "value of 37 ratio is 1 or less, preferably 1.6 or less, and most preferably 3.3 or less is particularly preferred.
    At least 1 to in the frequency range of 100rad / sec G '37 / G " value of 37 ratio, but may be varied in accordance with the increase of the frequency, but is not necessarily proportional to the frequency change. G' 37 / G" 37 ratio It should not change within the frequency range by more than 3 times, preferably 2 times, and most preferably it should remain constant.
    At 1 rad, a preferred value of G ′ 37 is less than 20000 Pa, preferably less than 15000 Pa, most preferably less than 10000 Pa. On the other hand, at a frequency of 1 rad / sec, the value of G ″ 37 should not exceed 15000 Pa, which is preferably less than 10000 Pa and most preferably less than 5000 Pa. The rheological criterion is a plastic compound which is liquid at 20 ° C. Or 51% to 99.5% of the composition, 0.5 to 20% of the polymeric compound or composition which can be dissolved or swelled in the plastic compound or the composition, preferably 5 to 15%, 0 to 600% by weight of the adhesive resin (weight of the polymeric compound) Plastic compound or composition is preferably from the group consisting of water, alcohols, preferably glycerol, glycols, polyglycols, liquid polybutenes, oils, and combinations thereof. And the polymeric compound or composition is preferably a block copolymer-thermoplastic elastomer, a styrene-block copolymer and hydrogen Selected from the group consisting of styrene-block copolymers.
    Very generally, preferred body adhesives are at least partially hydrophobic, wherein 60% by weight of the adhesive, more preferably 80% by weight, consists of a hydrophobic component and none of the materials in the adhesive are hydrophilic, ie the adhesive is completely hydrophobic. Most preferably made of.
    In a particularly preferred embodiment according to the invention the adhesive comprises less than 20%, more preferably less than 10% of the wearer facing surface of the absorbent article. The present invention is most advantageously applied in the field of sanitary napkins or pantyliners.
    The present invention relates to disposable absorbent products, in particular sanitary napkins, panty liners, adult incontinence products or sweat pads. In particular, the present invention relates to such disposable absorbent articles as are worn by direct attachment to the wearer's skin in areas where absorption of body fluid is desired.
    The present invention relates to disposable absorbent articles that can be applied and modified directly on the skin of a user. It exhibits absorption into body fluids, prevents the user's garments from being soiled, improves physical comfort for the user, and is easy to manufacture and package. Disposable absorbent articles are described below with respect to sanitary napkins or sanitary articles, but panty liners, adult incontinence products or sweat pads are also included in the term disposable absorbent articles. As used herein, the term “physiological zone” is intended to absorb and contain various body fluids (eg, vaginal discharge, menstrual blood and / or urine) that are worn by the woman adjacent to the vulva region and secreted from the body, and after one use Refers to a product that is intended to be discarded. Disposable absorbent articles are preferably thin, most preferably 1 mm to 5 mm thick, and may be present in a substantially flat or pre-shaped state prior to use.
    As used herein, the term “connected” or “fixed” refers to a structure in which the first member is directly coupled to the second member and to an intermediate member in which the first member is coupled to the second member such that the first member is coupled to the second member. It includes a structure that is indirectly coupled to.
    In a preferred embodiment, the sanitary napkin of the present invention comprises a liquid permeable top sheet, a liquid impermeable back sheet connected to the top sheet and an absorbent core positioned between the top sheet and the back sheet. The sanitary napkin has two major surfaces: a body contact surface or a wearer facing surface and a garment facing surface or a garment contact surface.
    The topsheet is compliant, soft to the touch and non-irritating to the wearer's skin. The topsheet may also have elastic properties that allow it to extend in one or two directions at a portion thereof or through the entirety of its extension. In addition, the topsheet allows fluid (eg, menstrual and / or urine) permeation to readily permeate through its thickness. Suitable topsheets include woven and nonwoven fabrics; Polymeric materials such as perforated thermoplastic films, perforated plastic films, and hydroformed thermoplastic films; And thermoplastic scrims. Suitable fabrics and nonwovens can be natural fibers (eg wood or cotton fibers), synthetic fibers (eg polymeric fibers such as polyester, polypropylene or polyethylene fibers) or mixtures of natural and synthetic fibers or bicomponent / multicomponent fibers It may be made of.
    Preferred topsheets used in the present invention are usually selected from high loft nonwoven topsheets and perforated film topsheets. Perforated shaped films are particularly desirable for topsheets because they pass through body feces but are nonabsorbent and reduce the tendency for the fluid to pass back through to wet the wearer's skin again. Thus, the surface of the molded film in contact with the wearer remains dry, thereby reducing body soiling and providing more comfort to the wearer. Suitable molding films are described in US Pat. No. 3,929,135, US Pat. No. 4,324,246, US Pat. No. 4,342,314, US Pat. No. 4,463,045 and US Pat. No. 5,006,394. Particularly preferred microperforated molded films are disclosed in US Pat. Nos. 4,609,518 and 4,629,643. Preferred topsheets for this invention are moldings described in one or more of the above patents and marketed as sanitary napkins as "DRI-WEAVE" by The Procter & Gamble Compony, Cincinnati, Ohio. It includes a film.
    Also contemplated by the present invention is a topsheet that does not have a uniform liquid passage except for a portion of the topsheet that includes the liquid passage. Typically, such topsheets will have liquid passages oriented such that they are permeable in the central direction to the liquid and impermeable in the circumferential direction.
    The wearer facing surface of the formed film topsheet may be hydrophilic to aid in the transfer of liquid through the topsheet faster than if the body facing surface is not hydrophilic. In a preferred embodiment, the surfactant is incorporated into the polymeric material of the film topsheet formed as described in WO 93/09741. The wearer facing surface of the topsheet can also be hydrophilized by treatment with a surfactant as described in US Pat. No. 4,950,254.
    Another alternative is called hybrid topsheets incorporating fibrous and film-like structures, and particularly useful embodiments of hybrid topsheets are disclosed in WO 93/09744, WO 93/11725 or WO 93/11726. It is described in.
    When referred to as topsheet, a multilayer structure or a single layer structure is considered. The hybrid topsheet is also contemplated as other multilayer topsheets, such as multilayer designs or primary and second topsheet designs.
    The absorbent structure or absorbent core may comprise the following components: (a) optionally, a first fluid distribution layer, preferably together with a second optional fluid distribution layer; (b) a fluid storage layer; (c) optionally a fibrous (“dusting”) layer beneath the storage layer; And (d) any other optional ingredient.
    a. First / second fluid distribution layer
    One optional component of the absorbent structure according to the present invention is a first fluid distribution layer and a second fluid distribution layer. The first distribution layer is typically under the topsheet and in fluid communication. The topsheet delivers the captured fluid to this first distribution layer for final distribution to the storage layer. The transfer of fluid through this first distribution layer takes place not only in thickness but also along the length and width of the absorbent article. Also an optional but preferred second distribution layer is typically below the first distribution layer and in fluid communication. The purpose of this second distribution layer is to easily capture fluid from the first distribution layer and quickly transfer it to the underlying storage layer. This helps to make full use of the fluid retention capacity of the underlying storage layer. The fluid distribution layer can be made of any material typical for such distribution layers. In particular, a fibrous layer that holds capillaries between fibers even when wet is useful as a distribution layer.
    b. Fluid storage layer
    The fluid storage layer is located in fluid communication and is typically below the first or second distribution layer. The fluid storage layer may comprise any common absorbent material or mixtures thereof. It preferably comprises an absorbent gelling material generally referred to as a "hydrogel", "superabsorbent", "hydrocolloid" material in combination with a suitable carrier.
    Absorbent gelling materials can absorb large amounts of aqueous body fluid and can also retain such absorbed fluid under moderate pressure. The absorbent gelling material may be uniformly or heterogeneously dispersed in a suitable carrier. Suitable carriers can also be used alone if they are absorbent on their own.
    Suitable gelling materials for use herein will often include substantially water insoluble, slightly crosslinked, partially neutralized, polymeric gelling materials. This material forms a hydrogel upon contact with water. Such polymeric materials can be prepared from polymerizable, unsaturated, acid containing monomers known in the art.
    Suitable carriers include materials commonly used in absorbent structures, such as natural, modified or synthetic fibers, especially modified or unmodified cellulose fibers, in fluff and / or tissue forms. Suitable carriers can be used with the absorbent gelling material, but they can also be used alone or in combination. Tissue or tissue laminate is most preferred in sanitary napkins / panty liners.
    An aspect of an absorbent structure made in accordance with the present invention includes a bilayer tissue laminate formed by folding the tissue itself. These layers may be combined with each other. Absorbent gelling material or other optional material may be included between the layers.
    Modified cellulose fibers such as reinforcing cellulose fibers can also be used. Synthetic fibers can also be used and include cellulose acetate, polyvinylidene fluoride, polyvinylidene chloride, acrylics (eg Orlon), polyvinyl acetate, insoluble polyvinyl alcohol, polyethylene, polypropylene, polyamides (eg Nylons), polyesters, bicomponent fibers, ternary fibers, mixtures thereof, and the like. Preferably, the fiber surface is treated to be hydrophilic or hydrophilic. The storage layer may also include filler materials such as perlite, diatomaceous earth, vermiculite and the like to improve liquid retention.
    Even if the absorbent gelling material is unevenly dispersed in the carrier, the storage layer can be locally uniform, ie have a distribution gradient in one or several directions within the dimensions of the storage layer. Heterogeneous distribution also refers to a laminate of carriers that partially or wholly contain the absorbent gelling material.
    c. Optional fibrous ("dusting") layer
    An optional component for inclusion in the absorbent core according to the present invention is a fibrous layer adjacent to the storage layer and usually underlying the storage layer. This underlying fibrous layer is commonly referred to as the "dusting" layer because it provides a substrate on which the absorbent gelling material is deposited in the storage layer during the manufacture of the absorbent core. Indeed, when the absorbent gelling material is in the form of a macrostructure, such as a fiber, sheet or strip, this fibrous "dusting" layer need not be included. However, since these "dusting" layers provide additional fluid handling capability, such as rapid suction of fluid along the length of the pad, incorporation thereof is usually preferred in the absorbent core according to the present invention.
    d. Other optional ingredients
    The absorbent core according to the present invention may comprise other optional components generally present in the absorbent web. For example, the reinforcing scrim can be placed in each layer of the absorbent core or between each layer. Such reinforcing scrims should have a structure that prevents the formation of interfacial barriers to fluid transfer, especially when located between each layer of the absorbent core. If structural integration occurs as a result of thermal bonding, a reinforcing scrim is generally not needed in the case of a thermally bonded absorbent structure according to the present invention.
    Another component which may be included in the absorbent core according to the invention and which is provided close to or as part of the first or second fluid distribution layer is an odor control agent. Activated carbon, coated activated carbon, suitable zeolite or clay material to conceal the color can optionally be incorporated into the absorbent core and also into the absorbent gelling material with the particular zeolite found to be useful. Such components may be incorporated in any desired form, but are often included as discrete, non-fibrous particles.
    The back sheet is absorbed by the absorbent core so that the contained secretions do not wet the materials in contact with the absorbent product, such as underpants, trousers, pajamas and undergarments. Preferably the back sheet is preferably made from a thin plastic film impermeable to liquids (eg, menstrual blood and / or urine), but other flexible liquid permeable materials may also be used. As used herein, the term "flexible" means a material that is compliant and easily conforms to the general shape and contour of the body. The back sheet can also have elastic properties that stretch in one or two directions.
    The back sheet typically extends throughout the absorbent core and extends to the top sheet and then folded around the absorbent core to form part of the top sheet. As such, the top sheet form described in US Pat. No. 4,342,314, column 16, lines 47-62 can be obtained without the need to selectively perforate the top sheet.
    The back sheet may comprise a woven material or a nonwoven material, a polymeric film such as a thermoplastic film of polyethylene or polypropylene, or a composite material such as a film coated nonwoven material. Preferably the back sheet is a polyethylene film having a thickness of about 0.012 mm (0.5 mil) to about 0.051 mm (2.0 mil).
    Examples of polyethylene films are the trade name P18-1401, manufactured by Clofei Corporation, Cincinnati, Ohio, and the trade name XP-39385, manufactured by Bisquin Division, Ethyl Corporation, Tere Haute, IN. Preferably the back sheet is embossed and / or matted to provide a more garment-like appearance.
    Preferably, the back sheet can also provide breathability to the absorbent article by making it at least water vapor permeable, preferably air permeable, without compromising the main function of the back sheet. The back sheet may be a laminate material, such as a combination of microporous film and / or nonwoven and / or perforated molded film. If desired, breathability may be defined around or in the center of the back sheet, or may exist over the entire back sheet.
    Topical Adhesive
    The product according to the invention described above is applied directly to the skin of a user. In particular, sanitary napkins are applied around the liquid discharge zone, typically in the genital area of female users. As used herein, the term “skin” refers not only to the specific derma of a user, but also to mucosal tissue and body hair typically observed in the genital area of a sanitary napkin user.
    In order to provide fixability to the user's skin of the product according to the invention, it is necessary to provide a topical adhesive, referred to as body adhesive, in a specific area on the top sheet side of the product opposite the wearer.
    Various designs are contemplated in this respect, but preferably a body adhesive is provided along the distal end of the top sheet such that the central area of the product is the adhesive free margin. Most suitably facilitates the installation of a product that places the liquid permeable top sheet of the adhesive member adjacent to the body fluid secretion organ so that the liquid is delivered into the absorbent structure of the absorbent product as soon as the liquid flows out without the possibility of leakage or spillage.
    However, the body adhesive does not need to be provided within the closure circumference around the top sheet, but in the incremental area, such as dots or discontinuous lines, to provide additional comfort for the wearer to the product, while cushioning between different attachment locations. Can be.
    In order to fulfill the object according to the invention, the following must be considered:
    Physical, rheological and adhesive properties of body adhesives
    Even when body adhesives are used as pressure sensitive adhesives on the hair and mucosal tissues of human skin, the body adhesive compositions are referred to as typical pressure sensitive adhesives (hereinafter referred to as PSAs) based on the most characteristic flowable aspect that identifies the substance. I understand that there is a difficulty in regard to this.
    Indeed, as those skilled in the art of adhesives know, the most distinguishing factor that distinguishes PSA from other materials that can temporarily stick objects (e.g. water between two glass plates) is their rheological parameters, in particular elasticity. It is a fact that the modulus (G ′) varies greatly depending on the frequency of the stress applied. More particularly, the G 'of the PSA may increase by several orders of magnitude while the frequency of the stress applied varies from the normal binding frequency to the normal resolution frequency, ie 1 rad / sec to 100 rad / sec as described below.
    As a first result, it is concluded that it is unacceptable to define a material to be used as a "body adhesive" by providing a rheological variable value, in particular a G 'value at a fixed frequency. This may be misjudged as it will include materials that have no practical value in the absence of other features. Therefore, rheological properties should be based on dynamic considerations.
    This applies not only to the elastic modulus G 'but also to the viscous modulus G "and thus also to tan (δ) = G" / G'. A typical PSA not only has a high variation of G 'across the frequencies considered, but also closer to or much higher than the G' value (ie, especially tan (δ) is about 1 or much greater than 1 in the typical frequency of the solution sum). It is well known to have a greater G " than).
    While not based on theory, this is largely due to the fact that much of the energy applied to the solution solution dissipates in the adhesive (and therefore is not effective in generating solution solution). Can be.
    To provide good bonding conditions at a frequency of about 1 rad / sec, the absolute value of the elastic modulus should not be too high, otherwise the adhesive will be too hard and cannot be bonded or molded immediately to the surface to be bonded. It is also important to have a low G " absolute value in order for the material to be flexible and properly adhered to the skin while having good adhesion which is particularly useful for use in menstrual convection.
    Finally, those skilled in the art will also recognize that the glass transition temperature of the PSA is a useful parameter to more fully define a useful group of PSA materials.
    As mentioned above, the material useful as the body adhesive according to the present invention has a rheological property mainly measured at a reference temperature of 37 ° C. (general human body temperature) and a range of frequencies. In the application of absorbent products (eg sanitary napkins) comprising body adhesives, it has been found that the contact of the adhesive is formed at a low frequency while the solution bond occurs at the rate of tearing off the product. This rate was expressed in 100 rad / sec frequency while the low frequency of adhesive bond was found to be on the order of 1 rad / sec. Thus, the frequency range for use according to the invention is 1 to 100 rad / sec. The following set of characteristics must be satisfied:
    - in the frequency range, and the elastic modulus G 'rate of change (%) of 37 G in 1rad / sec' up to 150% of 37, preferably less than 100%, more preferably less than 80%, the variance is a value based on Less than 10,000 Pa. This is met by the body adhesive, but to be illustrative, Pro meon (Promeon) RG-63B, quoted in the prior art represents a variance of an unacceptable 331% of the G '37, if according to the invention in the same frequency range.
    In the frequency range, the percent change in viscosity modulus G ″ 37 is 10,000 Pa or less, preferably 5,000 Pa or less, 5,000 Pa or less, most preferably 1,000 Pa or less.
    At least one to the value of G '37 / G "37 in the frequency range of 100rad / sec is preferably one should be the same as or greater, more preferably 1.6 or more, and most preferably at least 3.3, preferably from about 150 It should not exceed.
    In the application frequency of 1 rad / sec, G 'and G "are to be understood as values taken at a temperature of 37 ° C. In practical use of the product according to the invention, the actual storage temperature of the product and the temperature of the body adhesive in subsequent application are For example, it can reach up to about 37 ° C when stored in a hot bathroom near a radiator, but can reach temperatures near 0 ° C when stored in a storage room or bathroom with no winter heating and in an open window. The product according to the invention is used directly on the skin and the user does not want to wear an overly cold product, so the actual temperature of the body adhesive will reach 37 ° C. very quickly and may be warmed by the wearer before wearing. Is considered to be the best choice for body temperature.
    As mentioned above, the rheological behavior is also related to the value of the glass transition temperature Tg. In the body adhesive according to the invention, the Tg should be below -15 ° C, more preferably below -20 ° C and most preferably below -25 ° C.
    Chemical and Compositional Properties of Body Adhesives
    The following formulation criteria may further be used to meet the above rheological and physical property requirements of body adhesives. It should be appreciated that most of the compositions useful as body adhesives have a substantially gel-like structure and are preferably gels. This is derived from the following facts.
    The main component is a plasticizer which is a liquid substance at room temperature.
    Macromolecular or polymeric components are present in small amounts relative to the plasticizer. They form, in a preferred embodiment, three-dimensional networks generated by physical or chemical bonds between molecules. Particularly useful are the physical bonds present in systems containing block thermoplastic elastomers.
    More particularly, the composition typically comprises the following components.
    0.5-20% by weight, preferably 5-15% by weight macromolecular polymeric material or mixtures thereof, soluble or swellable among the plasticizer (s) mentioned below. By way of non-limiting example, macromolecules or polymeric materials include natural and / or synthetic products, such as natural rubbers or derivatives such as natural rubbers and gelatins, derivatives and alginates thereof; Polyacrylic; Polyvinyl alcohol; Polyethylene oxide; Polyvinylpyrrolidone (PVP) or polyvinyl ether, copolymers and derivatives thereof; Cellulose derivatives; Block copolymer thermoplastic elastomer, preferably styrenic block copolymer, more preferably hydrogenated styrol / ethylene-butylene / styrene (SEBS), styrene / isoprene / styrene (SIS) and styrol / ethylene-propylene / styrene ( SEPS).
    51 to 99.5% by weight of plastic substances or mixtures thereof which are liquid at room temperature. By way of non-limiting example, the plasticizer can be water, various alcohols (particularly glycerol), glycols, polyglycols, liquid polybutenes, natural or synthetic oils such as vegetable oils, mineral oils or combinations thereof.
    0 to 600% by weight of macromolecular polymeric material of the tacky resin, whose main range is particularly adapted to the glass transition temperature in systems containing synthetic polymers (based on synthetic polymers).
    0 to 10% by weight, more preferably 0 to 5% by weight, for the promotion and stabilization of the gel forming process of both hydrophilic or hydrophobic liquid plasticizers. These include, for oily systems, for example fatty acids having C 8 -C 22 carbon atoms, metal salts thereof and polyoxo-derivatives thereof; Lanolin derivatives; Silica; Bentonite, montmorillonite and derivatives thereof; Polyamides, waxes or mixtures thereof.
    Additives commonly known in the art, such as preservatives, antioxidants, ultraviolet (UV) inhibitors, pigments, inorganic fillers, rheology modifiers, may each be included in amounts of up to 10%.
    When chemical crosslinks are formed in the system, the crosslinkers may be present in an amount of preferably up to 5% by weight. Chemical crosslinkers can be formed by mutual neutralization of polymers with different functional groups, such as in the reaction between acid polyacryl and polysaccharide.
    Product compositions for body adhesives can be classified into the following three groups depending on the nature of the main component, namely the liquid plasticizer (s).
    (1) A hydrophobic composition wherein the plasticizer is typically an oil derived from a vegetable or mineral source or a blend thereof and the polymer is generally a soluble or swellable polymer in the oil (s), preferably an elastomer.
    (2) Mixed-phase compositions wherever possible in both the plasticizer and the polymer, wherein both the hydrophobic and hydrophilic components form two or more separate phases. In this case the emulsifier / surfactant is preferably present in an amount suitable to form a stable emulsion between the immiscible phases. In the case of the body adhesive according to the present invention, it is preferable to include the hydrophobic component as a main component as compared to the hydrophilic component;
    (3) Hydrophilic compositions, typically wherein the plasticizer is water / glycerol / glycol and / or mixtures thereof and the like and the polymer phase originates from a synthetic (eg polyacrylic) or natural (eg natural rubber) source or mixtures thereof.
    In contrast to the foregoing prior art and medicinal fields, it is emphasized that the hydrophobic and mixed phase compositions (1) and (2) above are preferred for use in the present invention, while hydrophilic compositions are not preferred.
    This depends, in part, on technical reasons in that many hydrophilic compositions used in the medical field exhibit too low elastic properties and adhesion for use in the present invention. Another reason for favoring hydrophobic or mixed phase compositions is that the application of the present invention, particularly in the field of sanitary napkins, involves the possibility of contacting the liquid with which the body adhesive will be absorbed. Since liquids are all common aqueous types, contact with hydrophilic body adhesives can partially absorb body fluids into body adhesives.
    This results in a change in rheological properties and thus an unsanitary appearance which results in the maintenance of direct contact with the skin for an extended period of body fluid, which is not intended by any of the disposable absorbent articles according to the invention. . In addition, some hydrophilic compositions are potentially good culture media for the growth of a large number of microorganisms, including pathogens, which may result in potential diseases for the wearer.
    Additional hydrophilic body adhesives can also be perceived as cold or wet conditions that do not meet typical consumer expectations when applying new sanitary napkins or underarm sweat pads. A further problem arises due to the fact that body adhesives, especially those comprising water as plasticizers, tend to be dehydrated if they are not sealed as an impermeable package.
    Absorbent articles according to the invention can be prepared by methods customary in the art. Application of the adhesive to the top sheet of the absorbent article may be provided by similar techniques commonly used for panty anchoring adhesives and therefore should not cause major problems for those skilled in the art. The total area of the wearer facing surface of the absorbent article occupied by the body adhesive should be 20% or less, preferably 10% or less. Preferably the adhesive is close to the periphery of the absorbent article and in the case of the film top sheet (or when the back sheet is folded over the top sheet) the adhesive is preferably present on a portion of the film that is liquid impermeable.
    Body adhesives on products (used with panty fixed adhesives) need to be protected before use. Such protection may be provided by a release liner, such as a siliconized or surfactant treated paper, provided that the paper has a good release surface for a specially selected body adhesive.
    In principle, the absorbent article according to the invention is supported by the body adhesive to the wearer and does not require an additional support for fixing. However, a non-slip coating may be provided on the back sheet side of the sanitary napkin for the purpose of preventing the sanitary napkin form from slowly deviating from its position. In addition, even if panty anchoring adhesives are not intended and thus undesirable for the present invention, they are not strictly excluded from the present invention.
    Example 1
    The oil-based compositions useful in the present invention are 9.9% by weight of Kraton G-1651, Witko, a styrene / ethylene-butylene / styrene block copolymer sold from Shell Co. and containing 33% by weight of styrene. It is formulated using 59.3% by weight of Kaidol, a paraffinic mineral oil commercially available from Witco Co. Moreover, the composition contains 301 parts of the tacky resin per 100 parts of the Kraton polymer. The adhesive resin is Ewcorez 5300, a hydrogenation resin commercially available from Exxon Co.
    Magnesium Stearate, available from Carlo Erba S.p.A., is used as an auxiliary gelling agent for oils at a concentration of 0.7% by weight.
    The antioxidant Irganox 1010, available from Ciba-Geigy, is added at a concentration of 0.3% by weight.
    Thus, the final blend has the following weight percentages:
    Kraton G-1651 9.9% by weight
    Kaidol 59.3% by weight
    Escorts 5300 29.8% by weight
    Magnesium Stearate 0.7% by weight
    Aganox 1010 0.3 wt%
    The composition exhibits the following rheological properties at 37 ° C .:
    a) Elastic Modulus at 1rad / sec G '37 = 6876Pa
    b) non-G '37 / G "of the elastic modulus and the viscous modulus at 1rad / sec 37 = 12.49
    In 100rad / sec of the elastic modulus and viscous modulus ratio G '37 / G "37 = 7.01
    c) a ratio of 'G in 100rad / sec for 37' at 37 G 1rad / sec: 1.308
    Comparative Example
    7.1% by weight of Kraton G-1651, a styrene / ethylene-butylene / styrene block copolymer sold by Shell Company and containing 33% by weight of styrene, and 41.9% by weight of kaidol, a paraffinic mineral oil marketed by Witko Company. Comparative oil-based composition is blended. Moreover, the composition contains 704 parts of the tacky resin per 100 parts of the Kraton polymer. The adhesive resin is Regalerez 3102, a hydrocarbon resin commercially available from Hercules Co.
    Magnesium stearate, available from Carlo Erva S.P.A, is used as an auxiliary gelling agent for oils at a concentration of 0.7% by weight.
    The antioxidant Aganox 1010, available from Ciba-Geigy, is added at a concentration of 0.3% by weight.
    Thus, the final blend has the following weight percentages:
    Kraton G-1651 7.7% by weight
    Kydol 41.9% by weight
    Regalez 3102 50.0% by weight
    Magnesium Stearate 0.7% by weight
    Aganox 1010 0.3 wt%
    The composition exhibits the following rheological properties at 37 ° C .:
    a) Elastic Modulus at 1rad / sec G '37 = 3059Pa
    b) 1rad / sec in G ratio of the elastic modulus and the viscous modulus' 37 / G "37 = 2.53
    Ratio G '37 / G "37 = 0.74 for the elastic modulus and the viscous modulus at 100rad / sec
    c) a ratio of 'G in 100rad / sec for 37' at 37 G 1rad / sec: 4.944
    The combination is considered very inconvenient when applied to forearm skin. Sensitive body hair cannot be tolerated when applied to many skins.
    权利要求:
    Claims (10)
    [1" claim-type="Currently amended] A disposable absorbent article having a wearer facing surface and a garment facing surface and comprising an absorbent core between the wearer facing surface and the garment facing surface,
    An adhesive for topical adhesive attachment of the absorbent article to at least a portion of the wearer facing surface,
    The adhesive has an elastic modulus G ′ 37 at 37 ° C. (100 ° F.) and a viscous modulus G ″ 37 at 37 ° C. (100 ° F.),
    Adhesive 1rad / sec of frequency (frequency) in the G '37 and 100rad / G at frequencies of sec "37 variation ΔG' 37 is G at the 1rad / sec frequency 'up to 150% of 37, preferably Selected to have a kinetic elastic behavior of less than 10,000 Pa,
    The adhesive is selected such that the deviation ΔG " 37 of G" 37 at a frequency of 1 rad / sec and G " 37 at a frequency of 100 rad / sec is selected to have a kinetic viscosity behavior of 10,000 Pa or less, preferably 5,000 Pa or less. doing,
    Disposable absorbent products that adhere to the wearer with a topical adhesive.
    [2" claim-type="Currently amended] The method of claim 1,
    A product having a value of a ratio of G ′ 37 to G ″ 37 in a frequency range of 1 to 100 rad / sec of 1 or more, preferably 1.6 or more, most preferably 3.3 or more.
    [3" claim-type="Currently amended] The method of claim 2,
    Frequency is at least 1 to 100rad / as sec of the increase in frequency range G "G for 37 'the ratio value of 37 changes and, G" G for "the change of 3 or less, preferably 2 or less product.
    [4" claim-type="Currently amended] The method according to any one of claims 1 to 3,
    G '37 is less than 20,000Pa in frequency of 1rad / sec, preferably less than 15,000Pa, most preferably less than 10,000Pa product.
    [5" claim-type="Currently amended] The method according to any one of claims 1 to 4,
    G " 37 is less than 15,000 Pa, preferably less than 10,000 Pa, most preferably less than 5,000 Pa at a frequency of 1 rad / sec.
    [6" claim-type="Currently amended] The method according to any one of claims 1 to 5,
    51-99.5% by weight of the plastic compound or composition, wherein the adhesive is liquid at 20 ° C., 0.5-20% by weight of the polymeric compound or composition soluble or swellable in the plastic compound or composition, and 0-600% by weight of the polymeric compound or composition An absorbent article that is a composition of a material comprising a phosphorous adhesive resin.
    [7" claim-type="Currently amended] The method of claim 6,
    The plastic compound or composition is selected from the group consisting of water, alcohols, glycols, oils and combinations thereof, wherein the polymeric compound or composition is a block copolymer-thermoplastic elastomer, a styrene-block copolymer and a hydrogenated styrene-block copolymer An absorbent product selected from the group consisting of:
    [8" claim-type="Currently amended] The method according to any one of claims 1 to 7,
    Absorbent article wherein the adhesive is at least partially hydrophobic, preferably 80% by weight of the adhesive consists of hydrophobic components, and most preferably all components of the adhesive are hydrophobic.
    [9" claim-type="Currently amended] The method according to any one of claims 1 to 8,
    Product wherein the adhesive comprises less than 20%, preferably less than 10%, of the wearer's facing surface.
    [10" claim-type="Currently amended] The method according to any one of claims 1 to 9,
    Products that are sanitary napkins or panty liners.
    类似技术:
    公开号 | 公开日 | 专利标题
    JP4116447B2|2008-07-09|Hydrogel composition
    EP2424948B1|2017-03-22|Releasable adhesive having a multilayer substrate
    US7055526B2|2006-06-06|Anti-snoring device comprising a skin compatible adhesive
    EP1497391B1|2008-06-11|Novel hydrophilic adhesive compositions
    EP1513561B1|2007-09-19|Skin adhesive for cushions and wound dressings
    US20190269814A1|2019-09-05|Pressure-sensitive adhesive agent for skin, pressure-sensitive adhesive sheet for skin, and face plate of ostomy appliance
    DE69519680T3|2006-11-30|Self-adhesive absorbent article
    US6756520B1|2004-06-29|Hydrophilic compositions for use on absorbent articles to enhance skin barrier
    US5814031A|1998-09-29|Structured occllusive dressings
    AU2002327001B2|2007-11-08|Feminine care product with discrete areas of a skin wellness additive
    AU2008337182B2|2013-12-05|Formulation and products for promoting skin cleanliness and health
    DE69914479T2|2005-01-20|Pressure sensitive adhesive composition
    US6620143B1|2003-09-16|Sanitary napkin article having body-facing adhesive
    ES2243260T3|2005-12-01|Absorbent article that has a coating of the side of the body given with a treatment product.
    EP1153617B1|2004-03-10|Sheet with oily ingredient-containing layer
    CN100360100C|2008-01-09|Interlabial absorbent article
    ES2526700T3|2015-01-14|Adhesive composition
    AU782939B2|2005-09-08|Microporous films comprising flocked fibers
    US6613030B1|2003-09-02|Disposable absorbent articles with improved adhesive for skin attachment
    AU720421B2|2000-06-01|Adhesive composition comprising a polysiloxane
    JP5587354B2|2014-09-10|Multipurpose adhesive composition
    US5618281A|1997-04-08|Adhesive composition comprising a polysiloxane
    EP2358318B1|2015-12-23|Multifunctional acrylate skin-adhesive composition
    US6515029B1|2003-02-04|Absorbent article having a hydrophilic lotionized bodyside liner
    KR100608505B1|2006-08-08|An absorbent article comprising an agent able to convey a perception to the wearer
    同族专利:
    公开号 | 公开日
    EP0850624A1|1998-07-01|
    HU0002786A3|2003-02-28|
    JP2000505697A|2000-05-16|
    CO4910107A1|2000-04-24|
    IL130365D0|2000-06-01|
    WO1998027909A1|1998-07-02|
    BR9715023A|2001-03-06|
    HU0002786A2|2001-01-29|
    AU5708898A|1998-07-17|
    NO993054D0|1999-06-21|
    AR010859A1|2000-07-12|
    CA2275285A1|1998-07-02|
    EP1006973A1|2000-06-14|
    TW496734B|2002-08-01|
    PE33799A1|1999-04-19|
    NO993054L|1999-08-23|
    EG21371A|2001-09-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-23|Priority to EP96120738A
    1996-12-23|Priority to EP96120738.8
    1997-07-01|Priority to EP97110727A
    1997-07-01|Priority to EP97110727.1
    1997-12-22|Application filed by 데이비드 엠 모이어, 더 프록터 앤드 갬블 캄파니
    2000-11-25|Publication of KR20000069674A
    优先权:
    申请号 | 申请日 | 专利标题
    EP96120738A|EP0850619A1|1996-12-23|1996-12-23|Disposable absorbent article for topical adhesive attachment to the skin of a wearer|
    EP96120738.8|1996-12-23|
    EP97110727A|EP0850624A1|1996-12-23|1997-07-01|Disposable absorbent article for topical adhesive attachment to the skin of a wearer|
    EP97110727.1|1997-07-01|
    [返回顶部]