Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
  • D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
  • D06M15/647—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing polyether sequences
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
  • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
  • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
  • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
  • A61F2013/51059—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers being sprayed with chemicals
  • A61F2013/51066—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers being sprayed with chemicals for rendering the surface hydrophilic
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2933—Coated or with bond, impregnation or core
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
  • Y10T428/31609—Particulate metal or metal compound-containing
  • Y10T428/31612—As silicone, silane or siloxane
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31652—Of asbestos
  • Y10T428/31663—As siloxane, silicone or silane
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—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
  • Y10T442/2139—Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc.]

Definitions

• the invention relates to a product comprising a fibrous support and a hydrophilic and / or permeabilizing coating, its preparation process and its use for example in or for absorbent disposable products, for example in diapers.
• a product comprising fibrous supports, often polymeric, whose hydrophilicity and / or permeability is modified, preferably in a lasting manner.
• it is sought to permanently modify the hydrophilicity and / or permeability of polypropylene nonwovens used in the construction of disposable absorbent products such as baby diapers.
• the polypropylene nonwoven may be the layer at least partially enveloping an absorbent compound, and in contact with the skin.
• nonwoven hydrophilic and / or permeable in order not to repel the urine, in a sustainable manner, and so that the hydrophilic and / or the permeability is retained after at least one contact with the 'urine.
• surface tension of the urine is not greatly lowered after it is brought into contact with a compound modifying the hydrophilicity and / or the permeability of the nonwoven.
• surfactants such as polyethoxylated al ylphenols. This is for example described 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 corona or plasma treatment.
• the hydrophilic polymer is an optionally modified polysaccharide.
• it is always sought to propose other products and methods in order to reduce the amount of coating used and / or to improve product performance and / or to simplify industrial processes, for example by proposing coatings that are easier to apply. implemented, and / or more simply to reduce the cost of the product.
• the invention provides a product comprising a fibrous support and a hydrophilic and / or permeabilizing coating bonded to at least part of a surface of the support, characterized in that the coating comprises: - a film covering at least one part of the support, - a hydrophilic and / or permeabilizing agent, - optionally, a compatibilizing agent for the film and at least part of a surface of the support, and - optionally, a wetting agent, other than the hydrophilic and / or permeabilizing agent.
• the invention also relates to disposable absorbent products, for example diapers for babies, comprising as one of its components, the product as mentioned above, or obtained using the method described below.
• the invention also relates to the use of the product described above or obtained using the method below, in disposable absorbent products, or for disposable absorbent products, for example in diapers for babies.
• the product can also be used in or for wipes, for household or skin care, mops, filters, technical papers or intended for printing.
• the invention also relates to a process for the preparation of products comprising a support and a coating on the support, which can make it possible to obtain a product as mentioned above.
• the process is described below.
• hydrophobic polymer is meant a polymer which lacks affinity for water.
• a hydrophobic polymer is a polymer whose surface has a contact angle (with water) of at least 70 °.
• durable bond or lasting hydrophilization or lasting permeabilization or resistance to leaching it is meant that a property in terms of bond (cohesion), hydrophilicity, or permeability, is at least partially preserved after two soaking of the product for a few seconds (by example 5 seconds) in water or in a solution of sodium chloride.
• polymer any macromolecular compound, crosslinked or not.
• the term “polymer” covers in particular the term “resin”.
• the product according to the invention comprises a fibrous support and a hydrophilic and / or permeabilizing coating.
• the fibrous support can be a thread, a fiber or a filament, a textile surface, woven or non-woven, or a paper.
• the yarns, fibers or filaments can be fiber yarns or filaments as such, not assembled on the textile surface.
• the textile surfaces can be woven or knitted surfaces, textile surfaces flocked or assembled in carpet (tufted surfaces) or non-woven surfaces.
• the fibrous support for example a nonwoven surface, can for example comprise a synthetic, natural polymer, or derivative of a natural polymer, for example a thermoplastic, cellulosic polymer or cellulose derivative, in the form of threads, fibers or filaments.
• the nonwoven surfaces include the surfaces produced by entanglement of preformed fibers, and possibly subsequent treatments of calendering, thermofusions, needling.
• the nonwoven surfaces also include the nonwoven surfaces obtained using high productivity processes, generally hot, "meltblown” or “spunbound” type. All these nonwoven surfaces and all these preparation methods are known to those skilled in the art.
• the polymer of the support is advantageously a hydrophobic polymer. As examples of hydrophobic polymers, there are:
• polyolefins such as polyethylenes, polypropylenes, ethylene-propylene copolymers, polyisobutene, polyisoprene,
• PET polyethylene terephthalates
• the polymer of the fibrous support can advantageously be a thermoplastic polymer based on polypropylene or polyethylene terephthalate, cellulose or a derivative, or a mixture.
• the support can 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 fibers of fibers polypropylene and cellulose fibers or a derivative).
• These supports are particularly useful for products (coated supports) used in disposable absorbent products such as baby diapers, feminine hygiene products, comfort products for incontinence. adult.
• the polymer of the support can contain more or less significant amounts of additives, such as pigments, delustrants, antioxidants, stabilizers (in particular thermal stabilizers or light or UV stabilizers), dyes, free radical scavengers, catalyst residues, etc.
• additives such as pigments, delustrants, antioxidants, stabilizers (in particular thermal stabilizers or light or UV stabilizers), dyes, free radical scavengers, catalyst residues, etc.
• additives which may be present are known to those skilled in the art. Supports that can be used are sold in particular by
• VILMED® brand Feudenberg
• BBA Nonwovens. Festra® or Veraspun® brands.
• the typical specific weights of these sails are, for example, from 10 to 20 g per m 2 .
• the coating is bonded to the support on at least a portion of a surface of the support.
• the coating includes:
• hydrophilic and / or permeabilizing agent optionally a compatibilizing agent for the film and at least part of a surface of the support, and
• a wetting agent other than the hydrophilic and / or permeabilizing agent.
• the film can for example be a polymeric film.
• the film can be obtained from at least one film-forming agent (film-forming agent alone, or combination of film-forming agents), for example a polymeric film-forming agent (polymer formed before application) or not (but capable of forming a polymer or a crosslinked resin after application). Details are given below.
• the compatibilizers may be agents intended to promote the bonding of the film to the support, or agents intended to promote 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 film-forming agents. Such agents are known to those skilled in the art.
• the wetting agents can be agents intended to promote the approach of film-forming agents or of a vector comprising film-forming agents on the support.
• Such agents may depend on the nature of the support, the coating process, and the nature of the film or film-forming agents. Such agents are known to those skilled in the art.
• the hydrophilic and / or permeabilizing agent may be an organic or inorganic agent. It may for example be a mineral hydrophilic agent. In that case the agent can be a dispersion of mineral particles included in the film, possibly in an upper part of the film, not linked to the support (peripheral part opposite the interface between the film and the support).
• the agent can according to another embodiment be a layer of mineral material covering at least part of the film.
• the hydrophilic and / or permeabilizing agent can be a hydrophilic polymeric agent, advantageously a polyether silicone.
• the polyether silicone has the following formula (I):
• OE means -O-CH2-CH2-
• OP means -O-CH2-CH2-CH2- R represents a hydrogen atom, or a linear or branched alkyl radical having from 1 to
• x is a number between 5 and 50
• y is a number between 3 and 10
• e is a number between 10 and 30
• p is a number between 0 and 10
• x / y is less than 10 and preferably less than or equal to 8
• e + p is less than 30 and preferably less than or equal to 20
• e / p is greater than 1 and preferably greater than or equal to 4
• x + y is less than 60 and preferably less than 40.
• Polyether silicones which can be used are in particular marketed by Rhodia under the name Rhodorsil SP3301, or by Degussa under the names Tegopren 5843, 5851, 5857, 8404, 8450, or 8462.
• the film can be a polymer in the form of a film.
• the film can be obtained from at least one film-forming agent, polymeric or not. It may be a film obtained from an aqueous dispersion of film-forming polymer insoluble in water (latex), for example a natural or synthetic latex.
• latex aqueous dispersion of film-forming polymer insoluble in water
• the preferred water-insoluble film-forming polymers can be obtained by polymerization of monomers chosen from:
• These monomers can be copolymerized with each other or with other ethylenically unsaturated monomers, to form homopolymers, copolymers or terpolymers.
• ethylene and olefins such as isobutene
• vinyl aromatic monomers such as methylstyrenes, vinyltoluenes
• vinyl halides such as vinyl chloride, vinylidene chloride, diolefins especially butadiene; (meth)
• a terpolymer of acetate / versatate / Dibutyl maleate type By way of example, mention may be made of a terpolymer of acetate / versatate / Dibutyl maleate type.
• the polymerization of the latex can be carried out in a manner known per se as an aqueous emulsion of the polymerizable monomers in the presence of at least one radical initiator and preferably of a transfer agent, for example of the mercaptan type with a concentration of monomers in the medium. reaction generally between 20 and 60% by weight.
• the polymerization can be carried out continuously, batchwise or semi-continuously with the introduction of a portion of the monomers continuously and be of the "seeded" or “incremental” type according to any known variant for obtaining particles of homogeneous and heterogeneous structure .
• a latex for the preparation of a latex, by way of nonlimiting example, reference will be made to the procedures described in patent EP 599,676 in the name of the present applicant.
• acrylic polymers are used for the film, that is to say which comprise polymers based on acrylic type monomers (such as alkyl acrylates and methacryiates, the alkyl group of which contains from 1 to 10 atoms).
• acrylic polymers for example the acrylates and methacryiates of methyl, ethyl, n-butyl, 2-ethylhexyl).
• acrylic polymers can also comprise other monomers, it can be for example styrene-acrylic varnish.
• the "pure" acrylic coating compositions ie based on acrylic type monomers only, are even more preferred.
• the latexes used can be chosen so that their glass transition temperature (TG) is between 10 ° and 60 ° C, and preferably between 20 ° and 40 ° C.
• TG glass transition temperature
• the sizes of the polymer particles in aqueous dispersion constituting the latexes according to the invention can be between 300 nanometers and 20 nanometers. These particle sizes are measured by laser particle size or by scanning microscopy after cryofracture of the sample.
• the aqueous dispersions of film-forming polymers may comprise plasticizers, this in order to reduce the film-forming temperature (TMMF) when the process of the invention is carried out under very cold temperature conditions, that is to say at temperatures below 0 ° C.
• TMMF film-forming temperature
• the hydrophilic and / or permeabilizing agent is included in the film.
• the hydrophilic agent may be advantageous for the hydrophilic agent to migrate to the periphery of the coating (or of the film) opposite the surface of the support to which the coating is bonded. It is believed that such migration can be induced for example by training during the elimination of the vector.
• the hydrophilic agent is a layer of material covering at least part of the film. For this embodiment, one can for example first apply a composition to form the film, then form a layer of hydrophilic and / or permeabilizing material.
• the coating, the hydrophilic and / or permeabilizing agent, the film, at least part of the surface of the support, optionally other ingredients of the coating, their quantities and the methods of preparation, are preferably chosen so that the bond between the support and the film is durable in the presence of an aqueous solution at a temperature between 10 ° C and 50 ° C.
• durable coating or durable treatment, or lasting bond of lasting hydrophilization or resistance to leaching, or lasting permeabilization are advantageously permeable to water (in particular for a non-woven support of polypropylene and / or cellulose or derivative, for products (coated supports) used in disposable absorbent products such as baby diapers, feminine hygiene, comfort products for adult incontinence.
• the support, the coating, and their connection are preferably such that the surface tension of an aqueous solution is not lowered by more than 50%, preferably by more than 40%, preferably more than 30%, preferably more than 20%, preferably 10%, after contacting the product with the aqueous solution.
• compositions comprising in particular the coating ingredients mentioned above, and a liquid carrier (to be removed subsequently to form a film).
• a composition useful for the implementation of the invention comprises: - at least one film-forming agent in a liquid vector, forming a film after elimination of the vector, - a hydrophilic and / or permeabilizing agent, - optionally, a compatibilizing agent for the film or the film-forming agent and at least a portion a surface of the support, - optionally, a wetting agent, other than the hydrophilic and / or permeabilizing agent.
• the operation is carried out in several stages, by forming a film, preferably comprising no hydrophilic and / or permeabilizing agent, then by forming a layer of material covering at least part of the film.
• the liquid vector can be an aqueous or non-aqueous vector (alcoholic, hydroxyalcoholic or other solvent), the polymer being in the form of a solution, dispersion or emulsion in this vector.
• the film-forming polymer in a liquid vector is a polymer dissolved in an aqueous vector or in a solvent, or an aqueous dispersion of film-forming polymer (latex).
• the nature of the vector, its quantity, and a possible dilution can be determined by a person skilled in the art.
• the product preferably has a weight ratio between the film and the hydrophilic and / or permeabilizing agent of between 99.9 / 0.1 and 90/10, preferably between 97/3 and 95/5.
• the product can have a coating weight ratio (dry) / support between 1% and 25%.
• dry coating weight ratio
• the film can provide a sufficiently high bond by simple coating effect of fibers of the fibrous support.
• the presence of the film on the support can contribute to an improvement in its mechanical properties.
• products whose support is a nonwoven surface for example comprising polypropylene and / or cellulose fibers can have superior mechanical properties. It is also possible to reduce the density (g / m 2 ) of the nonwoven while retaining satisfactory mechanical properties.
• a practical process for the preparation of the product according to the invention can comprise the following stages: a) optionally, exposing at least the surface part of the support to a preparation treatment promoting a bond between the coating and at least the treated part of the surface of the support, b) forming the coating according to one of the following methods b1) or b2): b1) b1a) applying to at least the part of the surface of the support a coating composition comprising: - at least one film-forming agent , for example a film-forming polymer, in a liquid vector, forming a film after elimination of the vector, - a hydrophilic and / or permeabilizing agent, - optionally, a compatibilizing agent for the film or the film-forming agent and at least the part of the surface of the support, - optionally, a wetting agent, other than the
• the film-forming agent used is a film-forming polymer
• it may be a polymer dissolved in an aqueous vector or in a solvent, or an aqueous dispersion of film-forming polymer (latex).
• Step a) is an optional pre-treatment step.
• Such a step may aim to improve the affinity of the composition for at least the part of the support intended to be coated, and / or to improve the bond between the coating and at least the treated part of the surface of the support.
• This treatment can be a dry or wet treatment.
• the dry treatments are, for example, treatments of the corona type, UV irradiation, plasma.
• Such surface treatments are known to those skilled in the art.
• Wet treatments include, for example, chemical type treatments, for example using chemical compounds modifying the chemical functions present on the surface of the support (oxidations, degradations, reductions, etc.)
• Step b1a) or b2a) can be implemented by any process allowing a liquid composition to be applied to a support. Any impregnation, coating or coating technique can be used. We can for example operate by
• compositions are known in particular under the following names: "Kiss roll”, "foaming”.
• the elimination step b1b) or b2c) can be implemented by simple evaporation, possibly accelerated by heating, or any other means (infrared, etc.).
• the support is in motion during the implementation of step b) .
• the support is for example in movement of scrolling of a surface:
• the support is a nonwoven surface, for example a nonwoven surface based on polypropylene or polyethylene terephthalate.
• the product according to the invention included in (or used in) in a disposable absorbent product, preferably a diaper (diaper) for babies, a feminine hygiene product, or a comfort product for adult incontinence. Such products are known to those skilled in the art.
• the product according to the invention is preferably used as an internal layer in the construction of disposable absorbent products.
• the disposable absorbent product can comprise other elements, known to those skilled in the art, for example elastics, distribution veils, etc.
• the product can be presented as a semi-intermediate product. finish used for the construction or assembly of a disposable absorbent product, preferably a baby diaper (diaper), a feminine hygiene product, or a comfort product for adult incontinence. It can then be in the form of rolls, and be marketed by manufacturers of nonwoven surfaces.
• the treatment is then preferably carried out downstream of the manufacture of nonwoven surfaces.
• the product can also be presented as part of a disposable absorbent product, preferably a diaper (diaper) for babies, a feminine hygiene product, or a comfort product for adult incontinence, and can be marketed by manufacturers of finished consumer products.
• the treatment will have been carried out as mentioned above, or continuously upstream of the manufacture of the finished articles (assembly or construction of layers), from rolls of non-woven non-treated surfaces, or in integrated processes of surface manufacture. , processing, assembly.
• compositions are prepared by adding hydrophilic agents to latex 1, at room temperature, with the latex / agent ratios mentioned in Table I below expressed as dry / dry, and diluting with permuted water.
• the surface tension is measured with the Whilemy blade according to standard ASTM D1331.
• the tests are carried out at 24 ° C. with distilled water at 71.9 mN / m 2 and a saline solution measured at 71 mN / m 2 as reference .
• the invention provides an interesting, lasting hydrophilicity and / or permeability, without significantly lowering the surface tension of a leaching water.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Paints Or Removers (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Laminated Bodies (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (2)

Family Applications After (1)

Country Status (11)

Families Citing this family (16)

Family Cites Families (16)

• 2003
  • 2003-10-08 FR FR0311759A patent/FR2860799B1/fr not_active Expired - Fee Related
• 2004
  • 2004-10-08 WO PCT/FR2004/002553 patent/WO2005035675A2/fr active IP Right Grant
  • 2004-10-08 AU AU2004279969A patent/AU2004279969B2/en not_active Ceased
  • 2004-10-08 BR BRPI0415188-7A patent/BRPI0415188B1/pt not_active IP Right Cessation
  • 2004-10-08 BR BRPI0415186-0A patent/BRPI0415186A/pt not_active IP Right Cessation
  • 2004-10-08 JP JP2006530425A patent/JP2007508407A/ja not_active Withdrawn
  • 2004-10-08 EP EP04791502A patent/EP1670985A2/fr not_active Withdrawn
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  • 2004-10-08 CA CA002539628A patent/CA2539628A1/fr not_active Abandoned
  • 2004-10-08 JP JP2006530424A patent/JP2007514563A/ja active Pending
  • 2004-10-08 DE DE602004013041T patent/DE602004013041T2/de active Active
  • 2004-10-08 CN CNB2004800294438A patent/CN100478409C/zh not_active Expired - Fee Related
  • 2004-10-08 WO PCT/FR2004/002552 patent/WO2005035674A2/fr active Application Filing
  • 2004-10-08 CN CNA2004800296626A patent/CN1867728A/zh active Pending
  • 2004-10-08 CA CA2541091A patent/CA2541091C/en not_active Expired - Fee Related
  • 2004-10-08 EP EP04791503A patent/EP1697475B1/fr not_active Not-in-force

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