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  Decorative flame barrier surface coveringUSPTO Application #: 20070275618Title: Decorative flame barrier surface covering Abstract: The invention relates to a product comprising a fibrous support and a hydrophilic coating, the preparation method thereof and the use of same, such as in or for disposable absorbent products, e.g. in diapers. More specifically, the invention relates to a product comprising a fibrous support and a hydrophilic and/or permeabilizing coating which is linked to at least part of a surface of the support. The invention is characterized in that the coating comprises a film that covers at least part of the support and a hydrophilic and/or permeabilizing agent. (end of abstract) Agent: Hunton & Williams LLP Intellectual Property Department - Washington, DC, US Inventors: Gilles Lorentz, Daniel Joubert, Marc Balastre USPTO Applicaton #: 20070275618 - Class: 442076000 (USPTO) Related Patent Categories: Fabric (woven, Knitted, Or Nonwoven Textile Or Cloth, Etc.), Coated Or Impregnated Woven, Knit, Or Nonwoven Fabric Which Is Not (a) Associated With Another Preformed Layer Or Fiber Layer Or, (b) With Respect To Woven And Knit, Characterized, Respectively, By A Particular Or Differential Weave Or Knit, Wherein The Coating Or Impregnation Is Neither A Foamed Material Nor A Free Metal Or Alloy Layer, Coating Or Impregnation Specified As Porous Or Permeable To A Specific Substance (e.g., Water Vapor, Air, Etc.) The Patent Description & Claims data below is from USPTO Patent Application 20070275618. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The invention relates to a product comprising a fibrous support and a hydrophilic and/or permeabilizing coating, to the process for preparing it and to its use, for example, in or for absorbent disposable products, for example in diapers. [0002] There is a need for products comprising fibrous supports, which are often polymeric, whose hydrophilicity and/or permeability is modified, preferably durably. For example, it is sought to durably modify the hydrophilicity and/or permeability of polypropylene nonwovens included in the construction of absorbent disposable products such as baby diapers. In diapers, the polypropylene nonwoven may be the layer at least partially surrounding an absorbent compound, and in contact with the skin. In particular, it is sought to make the nonwoven durably hydrophilic and/or permeable so as not to repel urine, and so that the hydrophilicity and/or the permeability is conserved after at least one contact with urine. Furthermore, it is sought to make provision such that the surface tension of urine is not greatly lowered after it comes into contact with a compound that modifies the hydrophilicity and/or the permeability of the nonwoven. [0003] To modify the hydrophilicity of polypropylene nonwoven, it is known practice, for example, to use surfactants, for instance polyethoxylated alkylphenols. This is described, for example, in example 1 of document WO 97/47801. Document WO 97/47801 describes products comprising a support durably coated with a hydrophilic polymer. The products are prepared by exposing the support to a plasma or corona treatment. The hydrophilic polymer is an optionally modified polysaccharide. [0004] However, it is still sought to propose other products and processes in order to reduce the amount of coating used and/or to improve the performance qualities of the product and/or to simplify the industrial processes, for example by proposing coatings that are simpler to implement, and/or more simply to reduce the cost price of the product. [0005] To this end, the invention proposes a product comprising a fibrous support and a hydrophilic and/or permeabilizing coating bonded over at least part of an area of the support, characterized in that the coating comprises: [0006] a film covering at least part of the support, [0007] a hydrophilic and/or permeabilizing agent, [0008] optionally, a compatibilizer for the film and for at least part of an area of the support, and [0009] optionally, a wetting agent, other than the hydrophilic and/or permeabilizing agent. [0010] The invention also relates to disposable absorbent products, for example baby diapers, comprising as one component thereof, the product as mentioned above or obtained using the process described below. The invention also relates to the use of the product described above or obtained using the process below, in disposable absorbent products, or for disposable absorbent products, for example in baby diapers. The product may also be used in or for wipes, for household care or for skincare, floor mops, filters, and technical papers or printing papers. [0011] The invention also relates to a process for preparing products comprising a support and a coating on the support, which can allow the production of a product as mentioned above. The process is described below. Definitions [0012] The term hydrophobic polymer means a polymer that lacks water affinity. In the present patent application, a hydrophobic polymer is a polymer for which one surface has a contact angle (with water) of at least 70.degree.. [0013] The terms "durable bonding", "durable hydrophilization", "durable permeabilization" and "resistance to leaching" mean that a property in terms of bonding (cohesion), hydrophilicity or permeability is at least partly maintained after soaking the product twice for a few seconds (for example 5 seconds) in water or in a sodium chloride solution. A property is said to be partly maintained if at least 50%, preferably 60%, preferably at least 70%, preferably at least 80%, preferably at least 90% and preferably at least 95% of the value of a measurement attributed to said property is maintained after soaking, relative to said value before soaking. [0014] The term "polymer" means any crosslinked or noncrosslinked macromolecular compound. In the present patent application, the term "polymer" especially covers the term "resin". Support [0015] The product according to the invention comprises a fibrous support and a hydrophilic and/or permeabilizing coating. [0016] The fibrous support may be a yarn, a fiber or a filament, a woven or nonwoven textile surface, or a paper. The yarns, fibers or filaments may be yarns, fibers or filaments per se, not assembled into a textile surface. The textile surfaces may be woven or knitted surfaces, flocked textile surfaces or surfaces assembled as carpets (tufted surfaces) or nonwoven surfaces. The fibrous support, for example a nonwoven surface, may comprise, for example, a synthetic or natural polymer, or a polymer derived from a natural polymer, for example a thermoplastic or cellulose-based polymer or a cellulose derivative, in the form of yarns, fibers or filaments. The nonwoven surfaces include surfaces made by entangling preformed fibers, and optionally subsequent calendering, hot-bonding, needlepunching, etc. treatments. The nonwoven surfaces also include nonwoven surfaces obtained using high productivity processes, generally with heat, such as "meltblown" or "spunbound" processes. All these nonwoven surfaces and all these preparation processes are known to those skilled in the art. [0017] The polymer of the support is advantageously a hydrophobic polymer. Examples of hydrophobic polymers that may be mentioned include: [0018] polyolefins such as polyethylenes, polypropylenes, ethylene-propylene copolymers, polyisobutene and polyisoprene, [0019] polystyrenes, and copolymers comprising styrene units, [0020] halogenated vinyl polymers such as PVC, PTFE or PVDF, [0021] hydrophobic vinyl polymers, [0022] polyethylene terephthalates (PET). [0023] It may also be a polymer that is not particularly hydrophobic, for instance polyamide, for example polyamide 6 or 66, or cellulose, or cellulose derivatives. [0024] The polymer of the fibrous support may advantageously be a thermoplastic polymer based on polypropylene or polyethylene terephthalate, cellulose or a derivative, or a mixture. The support may thus be a nonwoven comprising fibers based on polypropylene, polyethylene terephthalate, cellulose or a derivative, or a mixture of these fibers (for example a nonwoven of polypropylene fibers or nonwoven of polypropylene fibers and of fibers of cellulose or of a derivative). These supports are particularly advantageous for products (coated supports) used in disposable absorbent products, for instance baby diapers, feminine hygiene products and comfort products for adult incontinence. [0025] The polymer of the support may contain more or less large amounts of additives, for instance pigments, delustering agents, antioxidants, stabilizers (especially heat stabilizers, light stabilizers or UV stabilizers), paints, free-radical scavengers, catalyst residues, etc. The additives that may be present are known to those skilled in the art. [0026] Supports that may be used are sold especially by Feudenberg (brand name Vilmed.RTM.) or BBA Nonwovens (brand name Celestra.RTM. or Veraspun.RTM.). The typical specific weights of these voile fabrics are, for example, from 10 to 20 g/m.sup.2. Coating [0027] The coating is bonded to the support over at least part of an area of the support. The coating comprises: [0028] a film covering at least part of the support, [0029] a hydrophilic and/or permeabilizing agent, [0030] optionally, a compatibilizer for the film and for at least part of an area of the support, and [0031] optionally, a wetting agent, other than the hydrophilic and/or permeabilizing agent. [0032] The film may be, for example, a polymer film. The film may be obtained from at least one film-forming agent (film-forming agent alone, or combination of film-forming agents), for example a film-forming agent that is polymeric (polymer formed before application) or nonpolymeric (but capable of forming a polymer or a crosslinked resin after application). Details are given later. [0033] The compatibilizers may be agents for promoting the bonding of the film to the support, or agents for promoting the attachment of film-forming agents to the support. The use and choice of such agents may depend on the nature of the support, the coating process, and the nature of the film or of the film-forming agents. Such agents are known to those skilled in the art. [0034] The wetting agents may be agents for promoting the bringing together of film-forming agents or of a vector comprising film-forming agents with the support. The use and choice of such agents may depend on the nature of the support, the coating process, and the nature of the film or of the film-forming agents. Such agents are known to those skilled in the art. Continue reading... Full patent description for Decorative flame barrier surface covering Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Decorative flame barrier surface covering patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. 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