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)
• Building Environments (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2016
  • 2016-01-13 FR FR1650245A patent/FR3046567B1/fr not_active Expired - Fee Related
• 2017
  • 2017-01-11 KR KR1020187019671A patent/KR20180101381A/ko unknown
  • 2017-01-11 JP JP2018536494A patent/JP6960408B2/ja active Active
  • 2017-01-11 US US16/069,684 patent/US11162257B2/en active Active
  • 2017-01-11 CA CA3009134A patent/CA3009134C/fr active Active
  • 2017-01-11 AU AU2017206988A patent/AU2017206988A1/en not_active Abandoned
  • 2017-01-11 SG SG11201805945XA patent/SG11201805945XA/en unknown
  • 2017-01-11 EP EP17702426.2A patent/EP3402668A1/de not_active Withdrawn
  • 2017-01-11 RU RU2018129182A patent/RU2770055C2/ru active
  • 2017-01-11 WO PCT/FR2017/050057 patent/WO2017121954A1/fr active Application Filing
  • 2017-01-11 CN CN201780006685.2A patent/CN108430764A/zh active Pending
  • 2017-01-11 BR BR112018013025-7A patent/BR112018013025A2/pt not_active Application Discontinuation
• 2018
  • 2018-06-26 ZA ZA2018/04287A patent/ZA201804287B/en unknown
  • 2018-07-06 CL CL2018001853A patent/CL2018001853A1/es unknown

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