EP3402668A1 - Plaster-based acoustic board - Google Patents

Plaster-based acoustic board

Info

Publication number
EP3402668A1
EP3402668A1 EP17702426.2A EP17702426A EP3402668A1 EP 3402668 A1 EP3402668 A1 EP 3402668A1 EP 17702426 A EP17702426 A EP 17702426A EP 3402668 A1 EP3402668 A1 EP 3402668A1
Authority
EP
European Patent Office
Prior art keywords
textile
fibers
plaster
plate according
varies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17702426.2A
Other languages
German (de)
French (fr)
Inventor
Katarzyna Chuda
Caroline DEMATHIEU-ROELTGEN
Véronique CHOPIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Placo SAS
Original Assignee
Saint Gobain Placo SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Placo SAS filed Critical Saint Gobain Placo SAS
Publication of EP3402668A1 publication Critical patent/EP3402668A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/02—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material with fibres or particles being present as additives in the layer
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B13/08—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B13/12—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/14—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/043—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of plaster
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/044—Water-setting substance, e.g. concrete, plaster
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • 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
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]

Definitions

  • the invention relates to a gypsum board with acoustic properties.
  • a plate can be used in particular for the realization of a wall covering, a ceiling or a floor, and a partition wall.
  • the gypsum boards are generally composite boards comprising a plaster core disposed between two layers of paper or cardboard cover. These plates have mechanical properties that meet the standards in force, in particular good resistance to flexing under load.
  • Plaster-based plates as such do not exhibit particular acoustic performance.
  • a sound insulating material such as a glass wool or rock or a polymer
  • This composite product can be held in place by means of profiles, glue, screws or dowels depending on the intended use.
  • the most common gypsum boards have an average thickness of 12.5 mm and are generally marketed under the name "BA 13". These plates have a surface density of the order of 9 kg / m 2 . It is certainly well known that the acoustic performance of a plate can be improved by increasing its surface density, for example up to 12 kg / m 2 , without modifying its thickness, but this necessarily results in an increase in the amount of plaster in the plate.
  • the object of the present invention is to provide a gypsum board having improved acoustical properties while maintaining good mechanical properties.
  • This object is achieved according to the invention by replacing at least one of the layers of paper or cardboard coating of the plasterboard with a textile comprising glass fibers and an organic binder and / or incorporating said textile. in the plaster soul.
  • the gypsum-based plate thus comprises a textile containing glass fibers and an organic binder, and the plate is characterized in that said textile constitutes the coating layer (s) of the plaster core and / or is embedded in the plaster constituting the soul.
  • non-woven fabric also referred to as “non-woven”
  • non-woven fabric especially in the form of a veil or a mat, or a fabric.
  • the textile according to the invention contains at least 80% by weight of glass fibers, and preferably at least 90%.
  • the glass fibers may be in the form of unit filaments having a diameter ranging from 5 to 30 ⁇ m, yarns comprising a plurality of these glass filaments (base yarn) or an assembly of several basic yarns ( rovings or "roving").
  • the linear density of the basic glass or assembly son of such son ranges from 30 to 1500 tex.
  • the glass may be E, C, R or AR glass (alkali resistant). Glass E or C is preferred.
  • the glass fibers present in the nonwoven may be continuous or cut.
  • the length of the cut fibers generally varies from 0.5 to 15 cm, preferably from 1 to 10 cm and advantageously from 1 to 8 cm.
  • the textile may contain up to 20% by weight of fibers of a different chemical nature from that of the glass fibers, preferably at most 10%.
  • fibers examples include natural organic fibers such as silk, wool, cotton and cellulose or wood fibers, synthetic fibers such as viscose or rayon; the polymer fibers, in particular polyethylene, polypropylene, polystyrene, poly (meth) acrylate, polyamide, polyvinyl chloride, polyacrylonitrile, polyvinyl acetate, polyvinyl alcohol, polyester such as polyethylene terephthalate, polytetrafluoroethylene and aramid; mineral fibers such as silica, alumina, basalt or ceramic fibers; carbon fibers; and metal fibers such as silver, copper or steel fibers.
  • natural organic fibers such as silk, wool, cotton and cellulose or wood fibers
  • synthetic fibers such as viscose or rayon
  • the polymer fibers in particular polyethylene, polypropylene, polystyrene, poly (meth) acrylate, polyamide, polyvinyl chloride, polyacrylonitrile, polyvinyl acetate, polyvinyl alcohol
  • the textile comprising the glass fibers and optionally the other fibers also comprises an organic binder whose function is to bind the fibers together and to "consolidate” them, which gives the textile better mechanical properties, in particular sufficient rigidity for It can be handled easily without risk of being torn.
  • the organic binder according to the invention contains one or more organic polymers having a glass transition temperature (Tg) which varies from -50 to + 80 ° C., measured by differential scanning calorimetric analysis according to the standard ISO 1,1357-1: 2009.
  • Tg glass transition temperature
  • the glass transition temperature ranges from -40 to + 60 ° C, preferably from -10 to + 25 ° C and more preferably from 0 to + 10 ° C.
  • all the organic polymers present in the organic binder have a glass transition temperature within the limits indicated above.
  • the organic polymer is chosen from copolymers of an olefin such as ethylene, propylene, butylene or isobutylene and vinyl acetate, copolymers of vinyl acetate and of acid ( (meth) acrylate or (meth) acrylate, copolymers of (meth) acrylate and a monomer other than vinyl acetate, in particular styrene, homopolymers of (meth) acrylic acid or acrylate, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and acrylonitrile polymers, in particular copolymers of acrylonitrile and (meth) acrylate, in particular acrylonitrile and methacrylate, methyl, terpolymers of acrylonitrile, butadiene and styrene.
  • an olefin such as ethylene, propylene, butylene or isobutylene and vinyl acetate
  • the copolymers of (meth) acrylate and styrene are preferred, in particular copolymers of butyl acrylate and styrene.
  • the glass textile in the form of a nonwoven according to the invention is obtained by applying an aqueous organic binder composition to the glass textile formed by the dry process or the wet process, and then subjecting the textile to a heat treatment for eliminate the water.
  • molten glass contained in an oven is fed to a set of dies from which filaments flow by gravity and are drawn by a gaseous fluid.
  • the mineral filaments are harvested on a conveyor where they intermingle forming a mat.
  • the aqueous organic binder is applied using a suitable device, usually operating by curtain deposition, and the excess organic binder is removed by suction at the face. opposite.
  • the mat then enters a device containing hot air whose temperature, of the order of 200 to 250 ° C is adapted to remove the water and crosslink the organic binder in a very short time, of the order of 10 seconds to 1 minute, then the mat (non-woven) is collected in the form of a winding.
  • the mat is obtained from an aqueous dispersion of chopped glass fibers which is deposited by means of a forming head on a conveyor provided with perforations and the water is extracted through the conveyor thanks to a suction box.
  • the chopped glass fibers remaining on the conveyor form a mat which is treated under the same conditions as those described for the dry process to form a nonwoven.
  • the organic binder composition generally contains 10 to 70% by weight of water, preferably 30 to 60%.
  • the textile generally contains 10 to 50% by weight of organic binder calculated on the basis of solids, preferably 15 to 25%.
  • the textile may consist of several identical or different textiles bonded together by a mechanical treatment, for example by needling or air jet, and the assembly of these textiles is consolidated by the application of the aforementioned organic binder.
  • the textile generally has a basis weight which varies from 10 to 800 g / m 2 , preferably from 20 to 600 g / m 2 , advantageously from 30 to 500 g / m 2 , and more preferably from 35 to 120 g / m 2 .
  • the core of the plate is obtained from a composition based on plaster which comprises calcined gypsum and possible additives to improve the physico-chemical properties of the final product and to obtain good conditions of application .
  • the core can thus comprise the following additives in the following proportions by weight, expressed in parts per 100 parts by weight of plaster:
  • an adhesion agent whose function is to increase the adhesion of the coating when the latter is made of paper or cardboard with the plaster, preferably at most 15 parts,
  • a setting accelerator for example calcium sulphate hydrate or potassium sulphate
  • a biocide for example sodium omadine
  • a foaming agent whose role is to create pores to reduce the density of the final product.
  • At least one water-repellent agent for example a siloxane or a polysiloxane
  • At least one anti-fire agent for example vermiculite, silica, in particular of micrometric size, a clay or metal fibers,
  • At least one reinforcing agent for example polymer fibers, mineral fibers, in particular glass fibers, and animal or vegetable fibers.
  • the adhesion agent is a starch, in particular pretreated with an acid, a dextrin, a vegetable meal, in particular wheat or maize, a cellulose derivative, for example a methylcellulose or a hydroxymethylcellulose, a vinyl polymer , for example a polyvinyl alcohol, a polyvinyl acetate or an ethylene-vinyl acetate copolymer, a polymer of (meth) acrylic acid or alkyl (meth) acrylate, for example a polymethyl methacrylate, a polyvinylpyrrolidone in particular crosslinked with a polystyrene sulphonate, a styrene-butadiene latex, a polyester resin or an epoxy resin.
  • a starch in particular pretreated with an acid, a dextrin, a vegetable meal, in particular wheat or maize, a cellulose derivative, for example a methylcellulose or a hydroxymethylcellulose, a vinyl polymer , for example
  • the reinforcing agent consists of at most 5 parts of glass fibers having a length ranging from 3 to 12.5 mm and a diameter ranging from 5 to 50 ⁇ , preferably at most 3 parts.
  • the gypsum board is formed by a method known per se which consists of mixing calcined gypsum powder (calcium sulfate hemihydrate) with water to form a paste which is continuously deposited between two sheets of paper or of cardboard.
  • the formed product is pressed to obtain the desired thickness, and is then conveyed continuously on a conveyor over a distance allowing the dough to reach a level of hardening sufficient to be able to be cut into plates of determined length.
  • the plates are then dried in an oven to remove excess water.
  • the thickness of the plate thus obtained may vary from 6 to 25 millimeters, and preferably is of the order of 12.5 millimeters.
  • the amount of calcined gypsum used to form the dough generally varies from 50 to 150 parts by weight per 100 parts by weight of water and preferably from 60 to 120 parts.
  • the textile according to the invention replaces at least one of the coating layers of paper or cardboard coating the main faces of the plasterboard, and / or said textile is incorporated into the core. plaster.
  • the plasterboard comprises a textile which is disposed on one of the main faces of the plaster core or is embedded in the plaster.
  • the plaster-based plate comprises two textiles arranged on the two main faces of the plaster core, or a textile on one of these faces and the other embedded in the plaster.
  • the plaster-based plate comprises two textiles arranged on the two main faces of the plaster core and a third textile embedded in the plaster.
  • the textile incorporated in the core of the plate is arranged parallel to the layers of paper, cardboard or textile which cover the main faces of the core, and preferably the textile is located at an equal distance from the two layers of coating.
  • these textiles can be distributed in the thickness of the plaster uniformly or not, and in particular can be juxtaposed.
  • Another object of the present invention relates to the use of a textile as described above containing glass fibers and an organic binder comprising at least one organic polymer having a glass transition temperature which varies from -50 to +80. ° C for improving the acoustic properties, especially acoustic insulation properties, of a gypsum board comprising a gypsum core disposed between two layers of coating, wherein said textile constitutes the coating layer (s) and / or is drowned in the plaster soul.
  • the present invention also relates to a method for improving the acoustic properties of a gypsum board comprising providing a textile as described above containing glass fibers and an organic binder comprising at least one organic polymer having a vitreous transition temperature which varies from -50 to + 80 ° C, and the incorporation of said textile into the gypsum board, the latter constituting a coating layer and / or being embedded in the plaster core.
  • Another object of the present invention relates to the use of a gypsum board according to the invention for improving the sound insulation in a building.
  • the present invention also relates to a method for improving acoustic insulation in a building comprising the installation of a plasterboard plate according to the invention to form wall claddings, false ceilings, floors and / or partitions.
  • the gypsum board according to the invention can be used as such or in combination with another material, for example a mineral or wood wool, or a polymer to form an acoustic and / or thermal panel, or a film interlayer polymer providing the connection between two plaster-based plates to form composite panel.
  • another material for example a mineral or wood wool, or a polymer to form an acoustic and / or thermal panel, or a film interlayer polymer providing the connection between two plaster-based plates to form composite panel.
  • This plate can be used to form wall claddings, false ceilings, floors and partition walls.
  • Plaster-based plates comprising one or two textiles according to the invention are manufactured under the following conditions:
  • a plaster composition is prepared by introducing 1000 g of calcium sulfate hemihydrate, 5 g of starch, 0.1 g of a setting accelerator (fine gypsum treated with sucrose), 0.05 g of a retarding agent (Plast Retard L marketed by Sicit 2000) and 750 g of water in a blender equipped with a three-blast at a speed of 650 RPM for 15 seconds then 1850 RPM for 45 seconds.
  • a setting accelerator fine gypsum treated with sucrose
  • 0.05 g of a retarding agent Plast Retard L marketed by Sicit 2000
  • a foam is prepared by introducing 138.5 g of water and 1.4 g of foaming agent (Milifoam® marketed by Hunstman) in a blender equipped with a three-blast at a speed of 3300 RPM for 1 minute.
  • foaming agent Moilifoam® marketed by Hunstman
  • the gypsum composition obtained in step a) and 30 g of foam obtained in step b) are introduced into a mixer equipped with a planetary blade operating at a speed of 250 RPM for 50 seconds in order to obtain a paste.
  • the paste is poured into a brass mold with 4 parallelepipedic cavities (length: 300 mm, width: 30 mm, depth: 13 mm), the internal walls of which are coated with a layer of oil and the bottom is coated with a cardboard sheet or textile according to the invention.
  • the dough is first poured into the mold to a thickness of 6 mm, then deposits the cut fabric to the size of the mold and fills the mold with dough.
  • a sheet of cardboard or a mold-size textile is deposited on the dough and the mold is closed with a plate on which two masses of 5 kg each are placed.
  • the plates are demolded after 20 minutes, left in the open air for 10 minutes, then placed in a first oven at 180 ° C for 35 minutes and in a second oven at 100 ° C for 25 minutes.
  • the plates are stored in a dry chamber at 40 ° C.
  • the nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,
  • the nonwoven contains 20% by weight of binder calculated on the basis of solids and has a basis weight of 80 g / m 2 ,
  • the nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,
  • the nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,
  • the nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,
  • the nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight equal to 50 g / m 2 , and
  • V5 a sheet of cardboard (V5 marketed by Saint-Rersons).
  • Example 1 comprises a nonwoven (1) on one side of the plate and a sheet of cardboard on the other side.
  • Example 2 comprises a nonwoven (1) on each face of the plate.
  • Example 3 comprises a nonwoven (2) on one side of the plate and a sheet of cardboard on the other side.
  • Example 4 comprises a nonwoven (2) on each face of the plate.
  • Example 5 comprises a nonwoven in the plaster core, halfway up the thickness, and a carton on each side of the plate.
  • Example 6 comprises a nonwoven (4) on each face of the plate.
  • Example 7 comprises a nonwoven (5) on each side of the plate.
  • Comparative Example 8 comprises a nonwoven (6) on each face of the plate.
  • Comparative Example 9 comprises a nonwoven (7) on each face of the plate.
  • a plate having two sheets of cardboard and not including any textile according to the invention was prepared under the same conditions in the plaster core (Reference Example 10).
  • the acoustic performance of the plates is evaluated by measuring their mechanical impedance MIM ("Measurement of Mechanical Impedance") under the conditions of ISO 16940: 2008 (E). From the curve of the acceleration frequency (dB) as a function of the frequency (Hz), the dynamic Young's modulus (in GN / m 2 ) and the loss factor ⁇ (in%) are calculated. The acoustic gain is also calculated with respect to the plate of Example 6 (comparative).

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Civil Engineering (AREA)
  • Textile Engineering (AREA)
  • Electromagnetism (AREA)
  • Laminated Bodies (AREA)
  • Nonwoven Fabrics (AREA)
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Abstract

The present invention relates to a plaster-based board comprising a core made of plaster positioned between two coating layers, in which a textile containing glass fibers and an organic binder constitutes at least one of the coating layers and/or the textile is embedded in the plaster constituting the core. In said textile, the binder comprises one or more organic polymers having a glass transition temperature which varies from -50 to +80°C measured by differential scanning calorimetry according to the standard ISO 1357-1:2009.

Description

PLAQUE ACOUSTIQUE A BASE DE PLATRE  ACOUSTIC PLATE BASED ON PLASTER

L'invention se rapporte à une plaque à base de plâtre dotée de propriétés acoustiques. Une telle plaque peut être utilisée notamment pour la réalisation d'un parement mural, d'un plafond ou d'un plancher, et d'une cloison de séparation. The invention relates to a gypsum board with acoustic properties. Such a plate can be used in particular for the realization of a wall covering, a ceiling or a floor, and a partition wall.

Les plaques à base de plâtre sont généralement des plaques composites comprenant une âme en plâtre disposée entre deux couches de revêtement en papier ou en carton. Ces plaques possèdent des propriétés mécaniques qui répondent aux normes en vigueur, en particulier une bonne résistance à la flexion sous charge.  The gypsum boards are generally composite boards comprising a plaster core disposed between two layers of paper or cardboard cover. These plates have mechanical properties that meet the standards in force, in particular good resistance to flexing under load.

Les plaques à base de plâtre en tant que telles ne présentent pas de performances acoustiques particulières. Lorsqu'on souhaite améliorer ces performances, il est connu d'associer à ladite plaque un matériau isolant phonique tel qu'une laine de verre ou de roche ou un polymère, pour former un produit composite. Ce produit composite peut être maintenu en place au moyen de profilés, d'une colle, de vis ou de chevilles selon l'usage visé.  Plaster-based plates as such do not exhibit particular acoustic performance. When it is desired to improve these performances, it is known to associate with said plate a sound insulating material such as a glass wool or rock or a polymer, to form a composite product. This composite product can be held in place by means of profiles, glue, screws or dowels depending on the intended use.

Les plaques à base de plâtre les plus usuelles ont une épaisseur moyenne de 12,5 mm et sont commercialisées généralement sous la dénomination « BA 13 ». Ces plaques présentent une masse surfacique de l'ordre de 9 kg/m2. Il est certes bien connu que l'on peut améliorer les performances acoustiques d'une plaque en augmentant sa masse surfacique, par exemple jusqu'à 12 kg/m2, sans modifier son épaisseur, mais cela se traduit nécessairement par une augmentation de la quantité de plâtre dans la plaque. The most common gypsum boards have an average thickness of 12.5 mm and are generally marketed under the name "BA 13". These plates have a surface density of the order of 9 kg / m 2 . It is certainly well known that the acoustic performance of a plate can be improved by increasing its surface density, for example up to 12 kg / m 2 , without modifying its thickness, but this necessarily results in an increase in the amount of plaster in the plate.

De ce fait, le coût de la plaque est plus élevé.  As a result, the cost of the plate is higher.

La pose d'une plaque de masse surfacique plus élevée présente aussi des inconvénients : à cause de l'augmentation du poids, la manipulation de la plaque est plus délicate et éprouvante, et aussi du fait que la plaque est plus dense, il est plus difficile de la transpercer quand la fixation au support est effectuée à l'aide de vis. Ces inconvénients deviennent majeurs quand la plaque doit être fixée en hauteur, par exemple sur un plafond ou pour réaliser une cloison. The installation of a higher weight-density plate also has drawbacks: because of the increase in weight, the handling of the plate is more delicate and demanding, and also because the plate is denser, it is more difficult to pierce it when fixing to the support is done with screws. These disadvantages become major when the plate must be fixed in height, for example on a ceiling or to make a partition.

La présente invention a pour but de fournir une plaque à base de plâtre qui présente des propriétés acoustiques améliorées, tout en conservant de bonnes propriétés mécaniques.  The object of the present invention is to provide a gypsum board having improved acoustical properties while maintaining good mechanical properties.

Ce but est atteint selon l'invention en remplaçant l'une au moins des couches de revêtement en papier ou en carton de la plaque à base de plâtre par un textile comprenant des fibres de verre et un liant organique et/ou en incorporant ledit textile dans l'âme en plâtre.  This object is achieved according to the invention by replacing at least one of the layers of paper or cardboard coating of the plasterboard with a textile comprising glass fibers and an organic binder and / or incorporating said textile. in the plaster soul.

La plaque à base de plâtre comprend ainsi un textile renfermant des fibres de verre et un liant organique, et la plaque est caractérisée en ce que ledit textile constitue la ou les couches de revêtement de l'âme en plâtre et/ou est noyé dans le plâtre constituant l'âme.  The gypsum-based plate thus comprises a textile containing glass fibers and an organic binder, and the plate is characterized in that said textile constitutes the coating layer (s) of the plaster core and / or is embedded in the plaster constituting the soul.

Par « textile », on entend un non-tissé (aussi dénommé « intissé »), notamment se présentant sous la forme d'un voile ou d'un mat, ou un tissu.  By "textile" is meant a non-woven fabric (also referred to as "non-woven"), especially in the form of a veil or a mat, or a fabric.

Le textile conforme à l'invention renferme au moins 80 % en poids de fibres de verre, et de préférence au moins 90 %.  The textile according to the invention contains at least 80% by weight of glass fibers, and preferably at least 90%.

Les fibres de verre peuvent se présenter sous la forme de filaments unitaires ayant un diamètre qui varie de 5 à 30 μιτι, de fils comprenant une pluralité de ces filaments de verre (fil de base) ou d'un assemblage de plusieurs fils de base (stratifils ou « roving »). La masse linéique des fils de verre de base ou d'assemblage de tels fils varie de 30 à 1500 tex.  The glass fibers may be in the form of unit filaments having a diameter ranging from 5 to 30 μm, yarns comprising a plurality of these glass filaments (base yarn) or an assembly of several basic yarns ( rovings or "roving"). The linear density of the basic glass or assembly son of such son ranges from 30 to 1500 tex.

Le verre peut être du verre E, C, R ou AR (résistant aux alcalins). Le verre E ou C est préféré.  The glass may be E, C, R or AR glass (alkali resistant). Glass E or C is preferred.

Les fibres de verre présentes dans le non-tissé peuvent être continues ou coupées. La longueur des fibres coupées varie généralement de 0,5 à 15 cm, de préférence de 1 à 10 cm et avantageusement de 1 à 8 cm.  The glass fibers present in the nonwoven may be continuous or cut. The length of the cut fibers generally varies from 0.5 to 15 cm, preferably from 1 to 10 cm and advantageously from 1 to 8 cm.

Le textile peut renfermer jusqu'à 20 % en poids de fibres de nature chimique différente de celle des fibres de verre, de préférence au plus 10 %.  The textile may contain up to 20% by weight of fibers of a different chemical nature from that of the glass fibers, preferably at most 10%.

A titre d'exemples de telles fibres, on peut citer les fibres organiques naturelles telles que la soie, la laine, le coton et les fibres de cellulose ou de bois, les fibres synthétiques telles que la viscose ou la rayonne; les fibres de polymère, notamment en polyéthylène, polypropylène, polystyrène, poly(méth)acrylate, polyamide, polychlorure de vinyle, polyacrylonithle, poly(acétate de vinyle), poly(alcool vinylique), polyester tel que le polytéréphtalate d'éthylène, polytétrafluoroéthylène et aramide; les fibres minérales telles que les fibres de silice, d'alumine, de basalte ou de céramique; les fibres de carbone; et les fibres métalliques telles que les fibres d'argent, de cuivre ou d'acier. Examples of such fibers include natural organic fibers such as silk, wool, cotton and cellulose or wood fibers, synthetic fibers such as viscose or rayon; the polymer fibers, in particular polyethylene, polypropylene, polystyrene, poly (meth) acrylate, polyamide, polyvinyl chloride, polyacrylonitrile, polyvinyl acetate, polyvinyl alcohol, polyester such as polyethylene terephthalate, polytetrafluoroethylene and aramid; mineral fibers such as silica, alumina, basalt or ceramic fibers; carbon fibers; and metal fibers such as silver, copper or steel fibers.

Le textile comprenant les fibres de verre et éventuellement les autres fibres comprend aussi un liant organique qui a pour fonction de lier les fibres entre-elles et de les « consolider », ce qui confère au textile de meilleures propriétés mécaniques, notamment une rigidité suffisante pour pouvoir être manipulé facilement sans risque qu'il puisse être déchiré.  The textile comprising the glass fibers and optionally the other fibers also comprises an organic binder whose function is to bind the fibers together and to "consolidate" them, which gives the textile better mechanical properties, in particular sufficient rigidity for It can be handled easily without risk of being torn.

Le liant organique conforme à l'invention contient un ou plusieurs polymères organiques ayant une température de transition vitreuse (Tg) qui varie de -50 à +80°C mesurée par analyse calorimétrique différentielle selon la norme ISO 1 1357-1 :2009. De préférence, la température de transition vitreuse varie de -40 à +60°C, avantageusement de -10 à +25°C et mieux encore de 0 à +10°C.  The organic binder according to the invention contains one or more organic polymers having a glass transition temperature (Tg) which varies from -50 to + 80 ° C., measured by differential scanning calorimetric analysis according to the standard ISO 1,1357-1: 2009. Preferably, the glass transition temperature ranges from -40 to + 60 ° C, preferably from -10 to + 25 ° C and more preferably from 0 to + 10 ° C.

Avantageusement, tous les polymères organiques présents dans le liant organique ont une température de transition vitreuse comprise dans les limites indiquées ci-dessus.  Advantageously, all the organic polymers present in the organic binder have a glass transition temperature within the limits indicated above.

De manière générale, le polymère organique est choisi parmi les copolymères d'une oléfine telle que l'éthylène, le propylène, le butylène ou l'isobutylène et d'acétate de vinyle, les copolymères d'acétate de vinyle et d'acide (méth)acrylique ou de (méth)acrylate, les copolymères de (méth)acrylate et d'un monomère autre que l'acétate de vinyle, en particulier le styrène, les homopolymères d'acide (méth)acrylique ou d'acrylate, les terpolymères d'acétate de vinyle, d'une oléfine et d'un monomère d'ester vinylique, et les polymères d'acrylonitrile, notamment les copolymères d'acrylonitrile et de (méth)acrylate, en particulier d'acrylonitrile et de méthacrylate de méthyle, et les terpolymères d'acrylonitrile, de butadiène et de styrène. Les copolymères de (méth)acrylate et de styrène sont préférés, en particulier les copolymères d'acrylate de butyle et de styrène. Le textile de verre sous forme de non-tissé conforme à l'invention est obtenu en appliquant une composition aqueuse de liant organique sur le textile de verre formé par la voie sèche ou la voie humide, puis en soumettant le textile à un traitement thermique pour éliminer l'eau. In general, the organic polymer is chosen from copolymers of an olefin such as ethylene, propylene, butylene or isobutylene and vinyl acetate, copolymers of vinyl acetate and of acid ( (meth) acrylate or (meth) acrylate, copolymers of (meth) acrylate and a monomer other than vinyl acetate, in particular styrene, homopolymers of (meth) acrylic acid or acrylate, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and acrylonitrile polymers, in particular copolymers of acrylonitrile and (meth) acrylate, in particular acrylonitrile and methacrylate, methyl, terpolymers of acrylonitrile, butadiene and styrene. The copolymers of (meth) acrylate and styrene are preferred, in particular copolymers of butyl acrylate and styrene. The glass textile in the form of a nonwoven according to the invention is obtained by applying an aqueous organic binder composition to the glass textile formed by the dry process or the wet process, and then subjecting the textile to a heat treatment for eliminate the water.

Dans le procédé par voie sèche, du verre fondu contenu dans un four est acheminé vers un ensemble de filières à partir desquelles des filaments s'écoulent par gravité et sont étirés par un fluide gazeux. Les filaments minéraux sont récoltés sur un convoyeur où ils s'entremêlent en formant un mat.  In the dry process, molten glass contained in an oven is fed to a set of dies from which filaments flow by gravity and are drawn by a gaseous fluid. The mineral filaments are harvested on a conveyor where they intermingle forming a mat.

Sur la face supérieure du mat ainsi formé, on applique le liant organique aqueux à l'aide d'un dispositif adapté, le plus souvent opérant par dépôt par rideau, et on élimine l'excès de liant organique par aspiration au niveau de la face opposée. Le mat entre ensuite dans un dispositif contenant de l'air chaud dont la température, de l'ordre de 200 à 250°C est adaptée pour éliminer l'eau et réticuler le liant organique en un temps très court, de l'ordre d'une dizaine de secondes à 1 minute, puis le mat (non-tissé) est collecté sous la forme d'un enroulement.  On the upper face of the mat thus formed, the aqueous organic binder is applied using a suitable device, usually operating by curtain deposition, and the excess organic binder is removed by suction at the face. opposite. The mat then enters a device containing hot air whose temperature, of the order of 200 to 250 ° C is adapted to remove the water and crosslink the organic binder in a very short time, of the order of 10 seconds to 1 minute, then the mat (non-woven) is collected in the form of a winding.

Dans le procédé par voie humide, le mat est obtenu à partir d'une dispersion aqueuse de fibres de verre coupées qui est déposée au moyen d'une tête de formage sur un convoyeur muni de perforations et l'eau est extraite à travers le convoyeur grâce à un caisson d'aspiration. Les fibres de verre coupées restant sur le convoyeur forment un mat qui est traité dans les mêmes conditions que celles décrites pour le procédé par voie sèche pour former un non-tissé.  In the wet process, the mat is obtained from an aqueous dispersion of chopped glass fibers which is deposited by means of a forming head on a conveyor provided with perforations and the water is extracted through the conveyor thanks to a suction box. The chopped glass fibers remaining on the conveyor form a mat which is treated under the same conditions as those described for the dry process to form a nonwoven.

La composition de liant organique contient généralement 10 à 70 % en poids d'eau, de préférence 30 à 60 %.  The organic binder composition generally contains 10 to 70% by weight of water, preferably 30 to 60%.

Le textile contient généralement 10 à 50 % en poids de liant organique calculé sur la base des matières solides, de préférence 15 à 25 %.  The textile generally contains 10 to 50% by weight of organic binder calculated on the basis of solids, preferably 15 to 25%.

Le textile peut être constitué de plusieurs textiles identiques ou différents liés ensemble par un traitement mécanique, par exemple par aiguilletage ou jet d'air, et l'assemblage de ces textiles est consolidé par l'application du liant organique précité. Le textile présente en général une masse surfacique qui varie de 10 à 800 g/m2, de préférence 20 à 600 g/m2, avantageusement 30 à 500 g/m2, et mieux encore 35 à 120 g/m2. The textile may consist of several identical or different textiles bonded together by a mechanical treatment, for example by needling or air jet, and the assembly of these textiles is consolidated by the application of the aforementioned organic binder. The textile generally has a basis weight which varies from 10 to 800 g / m 2 , preferably from 20 to 600 g / m 2 , advantageously from 30 to 500 g / m 2 , and more preferably from 35 to 120 g / m 2 .

L'âme de la plaque est obtenue à partir d'une composition à base de plâtre qui comprend du gypse calciné et d'éventuels additifs permettant d'améliorer les propriétés physico-chimiques du produit final et d'obtenir de bonnes conditions d'application.  The core of the plate is obtained from a composition based on plaster which comprises calcined gypsum and possible additives to improve the physico-chemical properties of the final product and to obtain good conditions of application .

L'âme peut ainsi comprendre les additifs suivants dans les proportions pondérales suivantes, exprimées en parts pour 100 parts en poids de plâtre :  The core can thus comprise the following additives in the following proportions by weight, expressed in parts per 100 parts by weight of plaster:

- 0,1 à 25 parts d'un agent d'adhésion dont la fonction est d'augmenter l'adhésion du revêtement lorsque ce dernier est en papier ou en carton avec le plâtre, de préférence au plus 15 parts,  0.1 to 25 parts of an adhesion agent whose function is to increase the adhesion of the coating when the latter is made of paper or cardboard with the plaster, preferably at most 15 parts,

- 0,001 à 10 parts d'un accélérateur de prise, par exemple le sulfate de calcium hydraté ou le sulfate de potassium,  0.001 to 10 parts of a setting accelerator, for example calcium sulphate hydrate or potassium sulphate,

- 0,001 à 10 parts d'un retardateur de prise,  - 0.001 to 10 parts of a retarder,

- 0 à 10 parts d'un biocide, par exemple le sodium omadine,  0 to 10 parts of a biocide, for example sodium omadine,

- 0,0001 à 1 part d'un agent moussant qui a pour rôle de créer des pores afin de diminuer la densité du produit final. A titre d'exemple, on peut citer les alkyléthers sulfate de sodium et le laurylsulfate de sodium,  - 0.0001 to 1 part of a foaming agent whose role is to create pores to reduce the density of the final product. By way of example, mention may be made of sodium alkyl ether sulphate and sodium lauryl sulphate,

- 0 à 10 parts d'au moins un agent hydrofugeant, par exemple un siloxane ou un polysiloxane,  0 to 10 parts of at least one water-repellent agent, for example a siloxane or a polysiloxane,

- 0 à 20 parts d'au moins un agent anti-feu, par exemple la vermiculite, la silice, notamment de dimension micrométrique, une argile ou des fibres métalliques,  0 to 20 parts of at least one anti-fire agent, for example vermiculite, silica, in particular of micrometric size, a clay or metal fibers,

- 0 à 20 parts d'au moins un agent de renforcement, par exemple des fibres de polymère, des fibres minérales, notamment en verre, et des fibres animales ou végétales.  0 to 20 parts of at least one reinforcing agent, for example polymer fibers, mineral fibers, in particular glass fibers, and animal or vegetable fibers.

De préférence, l'agent d'adhésion est un amidon, notamment préalablement traité avec un acide, une dextrine, une farine végétale, notamment de blé ou de maïs, un dérivé de cellulose, par exemple une méthylcellulose ou une hydroxyméthylcellulose, un polymère vinylique, par exemple un polyalcool vinylique, un polyacétate de vinyle ou un copolymère éthylène-acétate de vinyle, un polymère d'acide (méth)acrylique ou de (méth)acrylate d'alkyle, par exemple un polyméthacrylate de méthyle, une polyvinylpyrrolidone notamment réticulée par un polystyrènesulfonate, un latex styrène-butadiène, une résine polyester ou une résine epoxy. Preferably, the adhesion agent is a starch, in particular pretreated with an acid, a dextrin, a vegetable meal, in particular wheat or maize, a cellulose derivative, for example a methylcellulose or a hydroxymethylcellulose, a vinyl polymer , for example a polyvinyl alcohol, a polyvinyl acetate or an ethylene-vinyl acetate copolymer, a polymer of (meth) acrylic acid or alkyl (meth) acrylate, for example a polymethyl methacrylate, a polyvinylpyrrolidone in particular crosslinked with a polystyrene sulphonate, a styrene-butadiene latex, a polyester resin or an epoxy resin.

De préférence encore, l'agent de renforcement est constitué d'au plus 5 parts de fibres de verre ayant une longueur variant de 3 à 12,5 mm et un diamètre variant de 5 à 50 μιτι, de préférence au plus 3 parts.  More preferably, the reinforcing agent consists of at most 5 parts of glass fibers having a length ranging from 3 to 12.5 mm and a diameter ranging from 5 to 50 μιτι, preferably at most 3 parts.

La plaque à base de plâtre est formée selon un procédé connu en soi qui consiste à mélanger du gypse calciné en poudre (hémihydrate de sulfate de calcium) avec de l'eau pour former une pâte qui est déposée en continu entre deux feuilles de papier ou de carton.  The gypsum board is formed by a method known per se which consists of mixing calcined gypsum powder (calcium sulfate hemihydrate) with water to form a paste which is continuously deposited between two sheets of paper or of cardboard.

Le produit formé est pressé pour obtenir l'épaisseur désirée, puis il est transporté en continu sur un convoyeur sur une distance permettant à la pâte d'atteindre un niveau de durcissement suffisant pour pouvoir être découpé en plaques de longueur déterminée. Les plaques sont ensuite séchées dans une étuve afin d'éliminer l'excès d'eau.  The formed product is pressed to obtain the desired thickness, and is then conveyed continuously on a conveyor over a distance allowing the dough to reach a level of hardening sufficient to be able to be cut into plates of determined length. The plates are then dried in an oven to remove excess water.

L'épaisseur de la plaque ainsi obtenue peut varier de 6 à 25 millimètres, et de préférence est de l'ordre de 12,5 millimètres.  The thickness of the plate thus obtained may vary from 6 to 25 millimeters, and preferably is of the order of 12.5 millimeters.

Classiquement, l'hémihydrate de sulfate de calcium (CaSO4.0,5 H2O ; gypse calciné), qu'il soit naturel ou synthétique c'est-à-dire issu notamment de la désulfuration des gaz de centrales thermiques, subit une réaction d'hydratation en présence d'eau et se transforme en dihydrate de sulfate de calcium (CaSO4.2 H2O : gypse). Classically, calcium sulphate hemihydrate (CaSO 4 .0.5 H 2 O calcined gypsum), whether natural or synthetic that is to say derived from the desulphurization of gases from thermal power plants, undergoes a hydration reaction in the presence of water and is converted into calcium sulfate dihydrate (CaSO 4 .2 H 2 O: gypsum).

La quantité de gypse calciné mis en œuvre pour former la pâte varie généralement de 50 à 150 parts en poids pour 100 parts en poids d'eau et de préférence de 60 à 120 parts.  The amount of calcined gypsum used to form the dough generally varies from 50 to 150 parts by weight per 100 parts by weight of water and preferably from 60 to 120 parts.

Comme indiqué précédemment, le textile conforme à l'invention remplace l'une au moins des couches de revêtement en papier ou en carton revêtant les faces principales de la plaque à base de plâtre, et/ou ledit textile est incorporé dans l'âme en plâtre.  As indicated above, the textile according to the invention replaces at least one of the coating layers of paper or cardboard coating the main faces of the plasterboard, and / or said textile is incorporated into the core. plaster.

Selon une première variante, la plaque à base de plâtre comprend un textile qui est disposé sur l'une des faces principales de l'âme en plâtre ou est noyé dans le plâtre. Selon une deuxième variante, la plaque à base de plâtre comprend deux textiles disposés sur les deux faces principales de l'âme en plâtre, ou un textile sur une de ces faces et l'autre noyé dans le plâtre. According to a first variant, the plasterboard comprises a textile which is disposed on one of the main faces of the plaster core or is embedded in the plaster. According to a second variant, the plaster-based plate comprises two textiles arranged on the two main faces of the plaster core, or a textile on one of these faces and the other embedded in the plaster.

Selon une troisième variante, la plaque à base de plâtre comprend deux textiles disposés sur les deux faces principales de l'âme en plâtre et un troisième textile noyé dans le plâtre.  According to a third variant, the plaster-based plate comprises two textiles arranged on the two main faces of the plaster core and a third textile embedded in the plaster.

Dans toutes les variantes précitées, le textile incorporé dans l'âme de la plaque est disposé parallèlement aux couches de papier, de carton ou de textile qui revêtent les faces principales de l'âme, et de préférence le textile se situe à égale distance des deux couches de revêtement.  In all the aforementioned variants, the textile incorporated in the core of the plate is arranged parallel to the layers of paper, cardboard or textile which cover the main faces of the core, and preferably the textile is located at an equal distance from the two layers of coating.

On ne saurait toutefois exclure de l'invention l'incorporation de plusieurs textiles identiques ou différents dans l'âme de plâtre, ces textiles pouvant être répartis dans l'épaisseur du plâtre de manière uniforme ou non, et notamment pouvant être juxtaposés.  However, it can not be excluded from the invention the incorporation of several identical or different textiles in the plaster core, these textiles can be distributed in the thickness of the plaster uniformly or not, and in particular can be juxtaposed.

Un autre objet de la présente invention concerne l'utilisation d'un textile tel que décrit ci-dessus renfermant des fibres de verre et un liant organique comprenant au moins un polymère organique présentant une température de transition vitreuse qui varie de -50 à +80°C pour améliorer les propriétés acoustiques, notamment les propriétés d'isolation acoustique, d'une plaque à base de plâtre comprenant une âme en plâtre disposée entre deux couches de revêtement, dans laquelle ledit textile constitue la ou les couches de revêtement et/ou est noyé dans l'âme en plâtre. La présente invention concerne également un procédé pour améliorer les propriétés acoustiques d'une plaque à base de plâtre comprenant la fourniture d'un textile tel que décrit ci-dessus renfermant des fibres de verre et un liant organique comprenant au moins un polymère organique présentant une température de transition vitreuse qui varie de -50 à +80°C, et l'incorporation dudit textile dans la plaque à base de plâtre, celui-ci constituant une couche de revêtement et/ou étant noyé dans l'âme en plâtre.  Another object of the present invention relates to the use of a textile as described above containing glass fibers and an organic binder comprising at least one organic polymer having a glass transition temperature which varies from -50 to +80. ° C for improving the acoustic properties, especially acoustic insulation properties, of a gypsum board comprising a gypsum core disposed between two layers of coating, wherein said textile constitutes the coating layer (s) and / or is drowned in the plaster soul. The present invention also relates to a method for improving the acoustic properties of a gypsum board comprising providing a textile as described above containing glass fibers and an organic binder comprising at least one organic polymer having a vitreous transition temperature which varies from -50 to + 80 ° C, and the incorporation of said textile into the gypsum board, the latter constituting a coating layer and / or being embedded in the plaster core.

Un autre objet de la présente invention concerne l'utilisation d'une plaque à base de plâtre conforme à l'invention pour améliorer l'isolation acoustique dans un bâtiment. La présente invention concerne également un procédé pour améliorer l'insolation acoustique dans un bâtiment comprenant l'installation d'une plaque à base de plâtre selon l'invention pour former des parements muraux, des faux-plafonds, des planchers et/ou des cloisons de séparation. Another object of the present invention relates to the use of a gypsum board according to the invention for improving the sound insulation in a building. The present invention also relates to a method for improving acoustic insulation in a building comprising the installation of a plasterboard plate according to the invention to form wall claddings, false ceilings, floors and / or partitions.

La plaque à base de plâtre conforme à l'invention peut être utilisée telle quelle ou en association avec un autre matériau, par exemple une laine minérale ou de bois, ou un polymère pour former un panneau acoustique et/ou thermique, ou encore un film polymère intercalaire assurant la liaison entre deux plaques à base de plâtre pour former panneau composite.  The gypsum board according to the invention can be used as such or in combination with another material, for example a mineral or wood wool, or a polymer to form an acoustic and / or thermal panel, or a film interlayer polymer providing the connection between two plaster-based plates to form composite panel.

Cette plaque peut être utilisée pour former des parements muraux, des faux-plafonds, des planchers et des cloisons de séparation.  This plate can be used to form wall claddings, false ceilings, floors and partition walls.

Les exemples qui suivent permettent d'illustrer l'invention sans toutefois la limiter.  The following examples illustrate the invention without limiting it.

EXEMPLES 1 A 10  EXAMPLES 1 TO 10

On fabrique des plaques à base de plâtre comprenant un ou deux textiles conformes à l'invention dans les conditions suivantes :  Plaster-based plates comprising one or two textiles according to the invention are manufactured under the following conditions:

a) on prépare une composition de plâtre en introduisant 1000 g d'hémihydrate de sulfate de calcium, 5 g d'amidon, 0,1 g d'un accélérateur de prise (gypse fin traité par du saccharose), 0,05 g d'un retardateur de prise (Plast Retard L commercialisé par Sicit 2000) et 750 g d'eau dans un mélangeur muni d'une tripale à la vitesse de 650 RPM pendant 15 secondes puis 1850 RPM pendant 45 secondes.  a) a plaster composition is prepared by introducing 1000 g of calcium sulfate hemihydrate, 5 g of starch, 0.1 g of a setting accelerator (fine gypsum treated with sucrose), 0.05 g of a retarding agent (Plast Retard L marketed by Sicit 2000) and 750 g of water in a blender equipped with a three-blast at a speed of 650 RPM for 15 seconds then 1850 RPM for 45 seconds.

b) on prépare une mousse en introduisant 138,5 g d'eau et 1 ,4 g d'agent moussant (Milifoam® commercialisé par Hunstman) dans un mélangeur muni d'une tripale à la vitesse de 3300 RPM pendant 1 minute.  b) a foam is prepared by introducing 138.5 g of water and 1.4 g of foaming agent (Milifoam® marketed by Hunstman) in a blender equipped with a three-blast at a speed of 3300 RPM for 1 minute.

c) on introduit la composition de plâtre obtenue à l'étape a) et 30 g de mousse obtenue à l'étape b) dans un mélangeur muni d'une pale planétaire opérant à la vitesse de 250 RPM pendant 50 secondes afin d'obtenir une pâte. d) on verse la pâte dans un moule en laiton comportant 4 cavités parallélépipédiques (longueur : 300 mm ; largeur : 30 mm ; profondeur : 13 mm) dont les parois internes sont enduites d'une couche d'huile et le fond est revêtu d'une feuille de carton ou du textile selon l'invention.  c) the gypsum composition obtained in step a) and 30 g of foam obtained in step b) are introduced into a mixer equipped with a planetary blade operating at a speed of 250 RPM for 50 seconds in order to obtain a paste. d) the paste is poured into a brass mold with 4 parallelepipedic cavities (length: 300 mm, width: 30 mm, depth: 13 mm), the internal walls of which are coated with a layer of oil and the bottom is coated with a cardboard sheet or textile according to the invention.

Lorsqu'un textile conforme à l'invention est incorporé dans la pâte, on verse d'abord la pâte dans le moule sur une épaisseur de 6 mm, puis on dépose le textile découpé à la dimension du moule et on remplit le moule avec de la pâte. When a textile according to the invention is incorporated in the dough, the dough is first poured into the mold to a thickness of 6 mm, then deposits the cut fabric to the size of the mold and fills the mold with dough.

On dépose une feuille de carton ou un textile à la dimension du moule sur la pâte et on ferme le moule avec une plaque sur laquelle on place deux masses de 5 kg chacune.  A sheet of cardboard or a mold-size textile is deposited on the dough and the mold is closed with a plate on which two masses of 5 kg each are placed.

Les plaques sont démoulées après 20 minutes, laissées à l'air libre pendant 10 minutes, puis placées dans une première étuve à 180°C pendant 35 minutes et dans une deuxième étuve à 100°C pendant 25 minutes. Les plaques sont conservées dans une enceinte sèche à 40°C.  The plates are demolded after 20 minutes, left in the open air for 10 minutes, then placed in a first oven at 180 ° C for 35 minutes and in a second oven at 100 ° C for 25 minutes. The plates are stored in a dry chamber at 40 ° C.

Dans les exemples, on utilise :  In the examples, we use:

- un non-tissé (1 ) constitué de filaments de verre E (diamètre : 10 μιτι ; longueur : 10mm) obtenu par la voie humide et lié par un liant aqueux contenant 50 % en poids d'un copolymère d'acrylate de butyle et de styrène (commercialisé sous la référence Acronal S 537 S par BASF ; Tg = -5°C). Le non-tissé contient 15 % en poids de liant calculé sur la base des matières solides et présente une masse surfacique égale à 50 g/m2, a non-woven fabric (1) consisting of glass filaments E (diameter: 10 μιτι, length: 10 mm) obtained by the wet route and bound by an aqueous binder containing 50% by weight of a butyl acrylate copolymer and styrene (marketed under the reference Acronal S 537 S by BASF, Tg = -5 ° C). The nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,

- un non-tissé (2) constitué de filaments continus de verre C (diamètre 5-13 μιτι) obtenu par la voie sèche et lié par un liant aqueux contenant 50 % en poids d'un copolymère d'acrylate de butyle et de styrène (commercialisé sous la référence Acronal S 537 S par BASF ; Tg = -5°C). Le non-tissé contient 20 % en poids de liant calculé sur la base des matières solides et présente une masse surfacique égale à 80 g/m2, - a nonwoven fabric (2) consisting of continuous glass filaments C (diameter 5-13 μιτι) obtained by the dry route and bound by an aqueous binder containing 50% by weight of a copolymer of butyl acrylate and styrene; (sold under the reference Acronal S 537 S by BASF, Tg = -5 ° C.). The nonwoven contains 20% by weight of binder calculated on the basis of solids and has a basis weight of 80 g / m 2 ,

- un non-tissé (3) constitué de filaments de verre E (diamètre : 10 μιτι ; longueur : 10mm) obtenu par la voie humide et lié par un liant aqueux contenant 47 % en poids d'un copolymère de butadiène et de styrène (commercialisé sous la référence Litex S 9076 par Synthomer ; Tg = -44°C). Le non-tissé contient 15 % en poids de liant calculé sur la base des matières solides et présente une masse surfacique égale à 50 g/m2, a non-woven fabric (3) consisting of glass filaments E (diameter: 10 μιτι, length: 10 mm) obtained by the wet route and bound by an aqueous binder containing 47% by weight of a copolymer of butadiene and styrene ( sold under the reference Litex S 9076 by Synthomer, Tg = -44 ° C.). The nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,

- un non-tissé (4) constitué de filaments de verre E (diamètre : 10 μιτι ; longueur : 10mm) obtenu par la voie humide et lié par un liant aqueux contenant 50 % en poids d'un copolymère de butadiène et de styrène (commercialisé sous la référence Lipaton SB 5841 par Synthomer ; Tg = -5°C). Le non-tissé contient 15 % en poids de liant calculé sur la base des matières solides et présente une masse surfacique égale à 50 g/m2, a non-woven fabric (4) consisting of glass filaments E (diameter: 10 μιτι, length: 10 mm) obtained by the wet route and bound by an aqueous binder containing 50% by weight of a butadiene-styrene copolymer ( sold under the reference Lipaton SB 5841 by Synthomer, Tg = -5 ° C.). The nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,

- un non-tissé (5) constitué de filaments de verre E (diamètre : 10 μιτι ; longueur : 10mm) obtenu par la voie humide et lié par un liant aqueux contenant 50 % en poids d'un copolymère de butadiène et de styrène (commercialisé sous la référence Synthomer VL10946 par Synthomer ; Tg = - 50°C). Le non-tissé contient 15 % en poids de liant calculé sur la base des matières solides et présente une masse surfacique égale à 50 g/m2, a nonwoven (5) consisting of glass filaments E (diameter: 10 μιτι, length: 10 mm) obtained by the wet route and bound by an aqueous binder containing 50% by weight of a butadiene-styrene copolymer ( sold under the reference Synthomer VL10946 by Synthomer, Tg = -50 ° C.). The nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight of 50 g / m 2 ,

- un non-tissé (6) constitué de filaments de verre E (diamètre : 10 μιτι ; longueur : 10mm) obtenu par la voie humide et lié par un liant aqueux contenant 25 % en poids d'un copolymère d'acide méthacrylique et d'ester acrylique (commercialisé sous la référence Rohagit sd 40 par Synthomer ; Tg = 100°C). Le non-tissé contient 15 % en poids de liant calculé sur la base des matières solides et présente une masse surfacique égale à 50 g/m2, et a non-woven fabric (6) consisting of glass filaments E (diameter: 10 μιτι, length: 10 mm) obtained by the wet route and bound by an aqueous binder containing 25% by weight of a methacrylic acid copolymer and acrylic ester (sold under the reference Rohagit sd 40 by Synthomer, Tg = 100 ° C). The nonwoven contains 15% by weight of binder calculated on the basis of solids and has a basis weight equal to 50 g / m 2 , and

- une feuille de carton (V5 commercialisé par la société Saint-Régis). a sheet of cardboard (V5 marketed by Saint-Régis).

L'exemple 1 comprend un non-tissé (1 ) sur une face de la plaque et une feuille de carton sur l'autre face. Example 1 comprises a nonwoven (1) on one side of the plate and a sheet of cardboard on the other side.

L'exemple 2 comprend un non-tissé (1 ) sur chaque face de la plaque. Example 2 comprises a nonwoven (1) on each face of the plate.

L'exemple 3 comprend un non-tissé (2) sur une face de la plaque et une feuille de carton sur l'autre face. Example 3 comprises a nonwoven (2) on one side of the plate and a sheet of cardboard on the other side.

L'exemple 4 comprend un non-tissé (2) sur chaque face de la plaque. Example 4 comprises a nonwoven (2) on each face of the plate.

L'exemple 5 comprend un non-tissé dans l'âme en plâtre, à mi-hauteur de l'épaisseur, et un carton sur chaque face de la plaque. Example 5 comprises a nonwoven in the plaster core, halfway up the thickness, and a carton on each side of the plate.

L'exemple 6 comprend un non-tissé (4) sur chaque face de la plaque. L'exemple 7 comprend un non-tissé (5) sur chaque face de la plaque. Example 6 comprises a nonwoven (4) on each face of the plate. Example 7 comprises a nonwoven (5) on each side of the plate.

L'exemple 8 comparatif comprend un non-tissé (6) sur chaque face de la plaque. Comparative Example 8 comprises a nonwoven (6) on each face of the plate.

L'exemple 9 comparatif comprend un non-tissé (7) sur chaque face de la plaque.  Comparative Example 9 comprises a nonwoven (7) on each face of the plate.

A titre de référence, on a préparé dans les mêmes conditions une plaque comportant deux feuilles de carton et n'incluant aucun textile conforme à l'invention dans l'âme en plâtre (Exemple 10 de référence). Les performances acoustiques des plaques sont évaluées en mesurant leur impédance mécanique MIM (« Measurement of Mechanical Impédance ») dans les conditions de la norme ISO 16940:2008(E). A partir de la courbe de la fréquence d'accélération (dB) en fonction de la fréquence (Hz), on calcule le module d'Young dynamique (en GN/m2) et le facteur de perte η (en %). On calcule aussi le gain acoustique par rapport à la plaque de l'exemple 6 (comparatif). As a reference, a plate having two sheets of cardboard and not including any textile according to the invention was prepared under the same conditions in the plaster core (Reference Example 10). The acoustic performance of the plates is evaluated by measuring their mechanical impedance MIM ("Measurement of Mechanical Impedance") under the conditions of ISO 16940: 2008 (E). From the curve of the acceleration frequency (dB) as a function of the frequency (Hz), the dynamic Young's modulus (in GN / m 2 ) and the loss factor η (in%) are calculated. The acoustic gain is also calculated with respect to the plate of Example 6 (comparative).

Les résultats sont donnés dans le tableau suivant.  The results are given in the following table.

Claims

REVENDICATIONS 1 . Plaque à base de plâtre comprenant une âme en plâtre disposée entre deux couches de revêtement, caractérisée en ce qu'elle comprend un textile renfermant des fibres de verre et un liant organique comprenant au moins un polymère organique présentant une température de transition vitreuse qui varie de -50 à +80°C, ledit textile constituant la ou les couches de revêtement et/ou étant noyé dans l'âme en plâtre. 1. Plaster-based plate comprising a plaster core disposed between two coating layers, characterized in that it comprises a textile containing glass fibers and an organic binder comprising at least one organic polymer having a glass transition temperature which varies from -50 to + 80 ° C, said textile constituting the coating layer or layers and / or being embedded in the plaster core. 2. Plaque selon la revendication 1 , caractérisée en ce que le textile est un non-tissé ou un tissu.  2. Plate according to claim 1, characterized in that the textile is a nonwoven or a fabric. 3. Plaque selon la revendication 1 ou 2, caractérisée en ce que le textile renferme au moins 80 % en poids de fibres de verre, de préférence au moins 90 %.  3. Plate according to claim 1 or 2, characterized in that the textile contains at least 80% by weight of glass fibers, preferably at least 90%. 4. Plaque selon l'une des revendications 1 à 3, caractérisée en ce que les fibres de verre sont des filaments unitaires ayant un diamètre qui varie de 5 à 30 μιτι, des fils comprenant une pluralité de ces filaments de verre (fil de base) ou un assemblage de plusieurs fils de base.  4. Plate according to one of claims 1 to 3, characterized in that the glass fibers are unit filaments having a diameter which varies from 5 to 30 μιτι, son comprising a plurality of these glass filaments (basic yarn ) or an assembly of several basic threads. 5. Plaque selon l'une des revendications 1 à 4, caractérisée en ce que le textile renferme jusqu'à 20 % en poids de fibres de nature chimique différente des fibres de verre, de préférence des fibres organiques naturelles ou synthétiques, des fibres de polymère, des fibres minérales, des fibres de carbone et des fibres métalliques.  5. Plate according to one of claims 1 to 4, characterized in that the textile contains up to 20% by weight of fibers of a different chemical nature of the glass fibers, preferably natural or synthetic organic fibers, polymer, mineral fibers, carbon fibers and metal fibers. 6. Plaque selon l'une des revendications 1 à 5, caractérisée en ce que le polymère organique est choisi parmi les copolymères d'une oléfine telle que l'éthylène, le propylène, le butylène ou l'isobutylène et d'acétate de vinyle, les copolymères d'acétate de vinyle et d'acide (méth)acrylique ou de (méth)acrylate, les copolymères de (méth)acrylate et d'un monomère autre que l'acétate de vinyle, en particulier le styrène, les homopolymères d'acide (méth)acrylique ou d'acrylate, les terpolymères d'acétate de vinyle, d'une oléfine et d'un monomère d'ester vinylique, et les polymères d'acrylonitrile, notamment les copolymères d'acrylonitrile et de (méth)acrylate, en particulier d'acrylonitrile et de méthacrylate de méthyle, et les terpolymères d'acrylonitrile, de butadiène et de styrène. 6. Plate according to one of claims 1 to 5, characterized in that the organic polymer is selected from copolymers of an olefin such as ethylene, propylene, butylene or isobutylene and vinyl acetate copolymers of vinyl acetate and (meth) acrylic acid or (meth) acrylate, copolymers of (meth) acrylate and a monomer other than vinyl acetate, in particular styrene, homopolymers (meth) acrylic acid or acrylate, terpolymers of vinyl acetate, an olefin and a vinyl ester monomer, and acrylonitrile polymers, in particular copolymers of acrylonitrile and meth) acrylate, in particular acrylonitrile and methyl methacrylate, and terpolymers of acrylonitrile, butadiene and styrene. 7. Plaque selon la revendication 6, caractérisée en ce que le polymère organique est un copolymère d'acrylate de butyle et de styrène. 7. Plate according to claim 6, characterized in that the organic polymer is a copolymer of butyl acrylate and styrene. 8. Plaque selon l'une des revendications 1 à 7, caractérisée en ce que le polymère organique a une température de transition vitreuse (Tg) qui varie de -40 à +60°C, de préférence de -10 à +25°C et avantageusement de 0 à +10°C.  8. Plate according to one of claims 1 to 7, characterized in that the organic polymer has a glass transition temperature (Tg) which varies from -40 to + 60 ° C, preferably from -10 to + 25 ° C and preferably from 0 to + 10 ° C. 9. Plaque selon l'une des revendications 1 à 8, caractérisée en ce que le textile contient 10 à 50 % en poids de liant organique calculé sur la base des matières solides, de préférence 15 à 25 %.  9. Plate according to one of claims 1 to 8, characterized in that the textile contains 10 to 50% by weight of organic binder calculated on the basis of solids, preferably 15 to 25%. 10. Plaque selon l'une des revendications 1 à 9, caractérisée en ce que le textile présente une masse surfacique qui varie de 10 à 800 g/m2, de préférence 20 à 600 g/m2, avantageusement 30 à 500 g/m2, et mieux encore 35 à 120 g/m2. 10. Plate according to one of claims 1 to 9, characterized in that the textile has a basis weight which varies from 10 to 800 g / m 2 , preferably 20 to 600 g / m 2 , preferably 30 to 500 g / m 2. m 2 , and more preferably 35 to 120 g / m 2 . 1 1 . Plaque selon l'une des revendications 1 à 10, caractérisée en ce qu'elle possède une épaisseur qui varie de 6 à 25 millimètres, et de préférence est de l'ordre de 12,5 millimètres.  1 1. Plate according to one of claims 1 to 10, characterized in that it has a thickness which varies from 6 to 25 millimeters, and preferably is of the order of 12.5 millimeters. 12. Utilisation d'une plaque à base de plâtre selon l'une des revendications 1 à 1 1 pour améliorer l'isolation acoustique dans un bâtiment.  12. Use of a gypsum board according to one of claims 1 to 1 1 to improve the sound insulation in a building. 13. Utilisation d'un textile renfermant des fibres de verre et un liant organique comprenant au moins un polymère organique présentant une température de transition vitreuse qui varie de -50 à +80°C pour améliorer les propriétés acoustiques d'une plaque à base de plâtre comprenant une âme en plâtre disposée entre deux couches de revêtement, dans laquelle ledit textile constitue la ou les couches de revêtement et/ou est noyé dans l'âme en plâtre.  13. Use of a textile containing glass fibers and an organic binder comprising at least one organic polymer having a glass transition temperature which varies from -50 to + 80 ° C to improve the acoustic properties of a plate based on glass fibers. plaster comprising a plaster core disposed between two layers of coating, wherein said textile constitutes the coating layer (s) and / or is embedded in the plaster core.
EP17702426.2A 2016-01-13 2017-01-11 Plaster-based acoustic board Withdrawn EP3402668A1 (en)

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FR1650245A FR3046567B1 (en) 2016-01-13 2016-01-13 ACOUSTIC PLATE BASED ON PLASTER.
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US11162257B2 (en) 2021-11-02
WO2017121954A1 (en) 2017-07-20
US20190017261A1 (en) 2019-01-17
CA3009134A1 (en) 2017-07-20
AU2017206988A1 (en) 2018-08-02
RU2018129182A (en) 2020-02-13
SG11201805945XA (en) 2018-08-30
JP6960408B2 (en) 2021-11-05
CL2018001853A1 (en) 2018-10-12
CN108430764A (en) 2018-08-21
FR3046567B1 (en) 2019-07-12
KR20180101381A (en) 2018-09-12
BR112018013025A2 (en) 2018-12-04
RU2018129182A3 (en) 2020-06-26
ZA201804287B (en) 2019-04-24
CA3009134C (en) 2023-06-13
JP2019504778A (en) 2019-02-21
RU2770055C2 (en) 2022-04-14
FR3046567A1 (en) 2017-07-14

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