Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
  • B29C70/28—Shaping operations therefor
  • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
  • B29C70/545—Perforating, cutting or machining during or after moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
  • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
  • B29C70/745—Filling cavities in the preformed part
• • 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
  • B32B27/12—Layered products comprising a layer of synthetic resin 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
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
  • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
• • 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
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
  • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• • 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
  • B32B5/18—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 features of a layer of foamed material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
  • B29K2023/04—Polymers of ethylene
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
  • B29K2023/10—Polymers of propylene
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
  • B29K2025/04—Polymers of styrene
  • B29K2025/06—PS, i.e. polystyrene
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
  • B29K2033/04—Polymers of esters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
  • B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2081/00—Use of polymers having sulfur, with or without nitrogen, oxygen or carbon only, in the main chain, as moulding material
  • B29K2081/06—PSU, i.e. polysulfones; PES, i.e. polyethersulfones or derivatives thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2009/00—Layered products
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/778—Windows
  • B29L2031/7782—Glazing
• • 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
  • B32B2260/046—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
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/40—Properties of the layers or laminate having particular optical properties
  • B32B2307/412—Transparent
• • 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
  • B32B2419/00—Buildings or parts thereof
• • 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
  • B32B2451/00—Decorative or ornamental articles
• • 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
  • B32B2457/00—Electrical equipment
• • 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
  • B32B2457/00—Electrical equipment
  • B32B2457/12—Photovoltaic modules
• • 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
  • B32B2603/00—Vanes, blades, propellers, rotors with blades
• • 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
  • B32B2605/00—Vehicles
• • 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
  • B32B2605/00—Vehicles
  • B32B2605/12—Ships
• • 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
  • B32B2605/00—Vehicles
  • B32B2605/18—Aircraft

Definitions

• the present invention relates to a method of manufacturing a multilayer composite material comprising a surface layer comprising a thermoplastic polymer A; a substrate layer comprising a polymeric composite material based on a thermoplastic polymeric (meth) acrylic matrix and a fibrous reinforcing material, and which allows the formation of one or more windows comprising a thermoplastic material capable of being transparent.
• the method is particularly suitable for producing parts or elements of two or three-dimensional mechanical structures or decorative articles requiring one or more windows comprising a thermoplastic material, which may be transparent.
• the invention also relates to a multilayer composite material comprising one or more windows of thermoplastic material capable of being transparent, obtained by the method and parts or elements of two or three-dimensional mechanical structures or decorative articles made with said material
• a composite material is a macroscopic combination of two or more immiscible materials.
• the composite material is constituted by at least one material that forms the matrix, that is to say a continuous phase ensuring the cohesion of the structure, and a reinforcing material.
• composite materials are widely used in several industrial sectors such as construction, automotive, aerospace, transportation, leisure, electronics and sports, particularly because of their better mechanical performance ( superior tensile strength, superior tensile modulus, superior fracture toughness) compared to homogeneous materials and their low density.
• the most important class in terms of volume on a commercial industrial scale is that of organic matrix composites, in which the matrix material is generally a polymer.
• the matrix or main continuous phase of a polymeric composite material is either a thermoplastic polymer or a thermosetting polymer.
• Thermosetting polymers consist of three-dimensional crosslinked structures. Crosslinking is achieved by baking reactive groups in said prepolymer. Baking can for example be achieved by heating the polymer chains to permanently cure and cure the material.
• the prepolymer is mixed with the other component such as beads or glass fibers or the other component is wetted or impregnated and subsequently baked.
• the other component such as beads or glass fibers or the other component is wetted or impregnated and subsequently baked.
• prepolymer or matrix material for thermosetting polymers are unsaturated polyesters, vinyl esters, epoxy or phenolic materials.
• thermosetting polymer matrix A major disadvantage of a thermosetting polymer matrix is its crosslinking.
• the matrix can not easily be shaped into other forms. Once the polymer is crosslinked, the shape is fixed. This also makes it difficult to recycle the thermosetting composite material and mechanical or structured manufactured parts or articles, including said thermosetting composite material, are burned in a cement plant or disposed of in a landfill.
• thermoplastic polymers To allow thermoforming and recycling it is preferred to use thermoplastic polymers.
• thermoplastic polymers are linear or branched polymers which are not crosslinked.
• the thermoplastic polymers are heated in order to mix the constituents necessary for the manufacture of the composite material and are cooled for the final frozen form.
• the problem of these molten thermoplastic polymers is their very high viscosity.
• thermoplastic polymer-based polymer composite material In order to prepare a thermoplastic polymer-based polymer composite material, a melt thermoplastic polymer resin, commonly known as a “syrup”, is used to impregnate the reinforcing material, for example a fibrous substrate. Once polymerized, the thermoplastic polymer syrup constitutes the matrix of the composite material. At the time of impregnation, the viscosity of the impregnating syrup must be controlled and adapted so as not to be too fluid or too viscous, so as to correctly impregnate each fiber of the fibrous substrate and to avoid the appearance of defects in the material final composite which causes, among other things, a loss of mechanical strength of the final composite material.
• an additional surface layer is applied. This can be achieved by means of a "gel coat” surface coating or a layer of paint.
• the gel coat is usually made chemically by an epoxy resin or an unsaturated polyester, treated to form a crosslinked polymer which adheres to the composite material.
• the multilayer material comprising a thermoplastic composite has lost the properties of the thermoplastic polymers and can no longer be thermoformed or recycled.
• the multilayer composite material for producing mechanical parts or structured elements or articles, described in this patent application comprises:
• thermoplastic polymer A a surface layer comprising a thermoplastic polymer A
• a substrate layer comprising a polymeric composite material, characterized in that the polymeric composite material comprises a thermoplastic polymeric (meth) acrylic matrix and a fibrous reinforcing material in which the fibrous material comprises either fibers having a form at least equal to 1000 or said fibrous material has a macroscopic structure in two dimensions.
• the polymeric composite material comprises a thermoplastic polymeric (meth) acrylic matrix and a fibrous reinforcing material in which the fibrous material comprises either fibers having a form at least equal to 1000 or said fibrous material has a macroscopic structure in two dimensions.
• the object of the present invention is to solve this technical problem.
• the invention aims to provide a method of producing multilayer composite material that can be implemented at low cost, which includes the production of one or more windows of transparent or non-transparent material and which allows a production at the same time.
• industrial scale for producing the structural parts in a thermoplastic multilayer composite material comprising at least one transparent window or not.
• the process must be simple and quick to implement using commercially available components. Parts manufacturing also needs to be repeatable and fast, which means short cycle times.
• Another object of the present invention is to be able to manufacture a composite multilayer structure for producing parts comprising a thermoplastic composite material with one or more transparent or non-transparent windows, having a satisfactory surface appearance concealing the fibrous appearance of the surface layer while remaining a thermoplastic composite material.
• Another object of the present invention is to be able to manufacture multilayer structural parts comprising a thermoplastic composite material with one or more transparent or non-transparent windows, in which the adhesion between the respective different layers does not require additional adhesive materials.
• Another object of the present invention is to be able to manufacture multilayer structural parts comprising a thermoplastic composite material with transparent windows or not, which can be transformed and shaped by the flexibility of each layer.
• Another object of the invention is to be able to recycle structural parts comprising a multilayer material that are worn or do not meet the quality criteria of manufacture.
• WO2012 / 088569 discloses a production process for testing the surface quality of composites.
• the document W2012 / 136235 describes a process for producing a multi-body composite material with a class A surface coating.
• the surface is obtained by applying a spray to a coating system of a mold. and treatment.
• the coating is not thermoplastic and therefore it can not be thermoformed or recycled.
• WO2007 / 021797 discloses a powder coating composition for the surface coating of thermoplastic composites.
• the powder coating comprises a vinyl acetate copolymer and a thermoplastic or thermosetting binder.
• US2005 / 051255 discloses a method of manufacturing a multilayer composite material for the manufacture of a thin panel with transparent windows. The windows are made using metal frames in the panel.
• thermoplastic polymer one of the layers being a surface layer (1) comprising a thermoplastic polymer A, and at least one window in a fibrous reinforcing material comprising long fibers , said windows being intended to coincide,
• thermoplastic plate insert or not a thermoplastic plate in the said window or windows
• the windows are made by the same method of manufacturing the multilayer composite material.
• the production of one or more windows is included in the manufacturing steps of the multilayer composite material.
• the material present in the windows is obtained by the insertion of a thermoplastic plate into said windows and / or with the impregnation and polymerization stages allowing the manufacture of the multilayer composite material, which represents a gain of time and simplification for manufacturing parts on an industrial scale.
• the insertion of a transparent or non-transparent thermoplastic plate into the window or windows in the process for manufacturing the multilayer composite material makes it possible, thanks to the impregnation and polymerization steps, to join the plate or plates to the layers constituting the material. composite and to obtain a material with one or more transparent windows or not.
• the method does not require bonding or welding operation of a reported transparent part.
• thermoplastic polymer one of which is a surface layer (1) comprising a thermoplastic polymer A
• a substrate layer (2) comprising a polymeric composite material comprising a thermoplastic (meth) acrylic polymeric matrix and a reinforcing fibrous material, said fibrous material consisting of long fibers and
• thermoplastic polymer and substrate layers at least one window in the thermoplastic polymer and substrate layers, said window being filled with a thermoplastic material consisting of the thermoplastic polymeric (meth) acrylic matrix or a thermoplastic plate,
• thermoplastic material allows the realization of mechanical parts or structured elements or articles with windows filled with a thermoplastic material.
• the multilayer composite material comprises an additional intermediate layer between the surface layer and the substrate layer, said intermediate layer comprising a thermoplastic polymer B comprising a window also filled with the thermoplastic material or the thermoplastic plate.
• the present invention relates to a method for manufacturing a multilayer composite material for producing mechanical parts or structured elements or articles, comprising the following steps:
• thermoplastic polymer one of the layers being a surface layer (1) comprising a polymer thermoplastic A, and at least one window in a fibrous reinforcing material (2) consisting of long fibers, said windows being intended to coincide,
• the method comprises: thermoforming the surface layer comprising a thermoplastic polymer A,
• thermoforming is in the form of a film or plate.
• Said film or plate has a thickness less than 10mm, preferably less than 6mm.
• the method comprises:
• the plate inserted into the window or windows is transparent and allows a transmission of light greater than 65%, preferably greater than 75% and more preferably greater than 85%.
• step a) The cutting of step a) is done in a single step after superposition of the surface layer and the fibrous material or separately for the fibrous material and for the surface layer.
• the cutting step a) is performed by means of a cutting tool such as scissors, a cutting press, punch, laser.
• the impregnation of the fibrous material of step c) is carried out in a closed mold.
• Step c) of impregnating the reinforcing fibrous material with the liquid (meth) acrylic syrup and the d) polymerization step of the liquid (meth) acrylic syrup are carried out in the same closed mold.
• surface layer refers to the upper or outer layer of the multilayer composite material exposed to the environment.
• substrate layer refers to the layer comprising the thermoplastic polymeric composite material of the multilayer composite.
• intermediate layer means that this layer is between the surface layer and the substrate layer of the multilayer composite material.
• fibrous material refers to fabrics, veils, felts or nonwovens which may be in the form of strips, webs, braids, locks or pieces.
• window refers to a cut in the layers forming the composite material and intended to be filled with a thermoplastic material may be transparent.
• transparent window refers to a window filled with a transparent thermoplastic material.
• thermoplastic plate as used means a thermoplastic polymer plate.
• transparent as used means to let the light of the visible spectrum pass with a transmission of light greater than 65%, according to the light transmission measurements defined by the ASTM D 1003 standard.
• (meth) acrylic refers to any type of acrylic and methacrylic monomers.
• thermoplastic polymeric matrix [055] The term "thermoplastic polymeric matrix
• thermoplastic polymeric (meth) acrylic matrix essentially polymers having monomers at 50% by weight or more of the thermoplastic (meth) acrylic polymeric matrix.
• PMMA refers to homo- and copolymers of methyl methacrylate (MMA), the ratio of MMA in PMMA being at least 70% by weight for the MMA copolymer.
• polymerization refers to the process of converting a monomer or a mixture of monomers into a polymer.
• thermoplastic polymer refers to a polymer that turns into a liquid or becomes more liquid or less viscous when heated and that can take on new forms through the application of heat and pressure (thermoforming). After cooling the polymer comes back hard and keeps its new shaped shape.
• thermosetting polymer refers to a prepolymer in a liquid, solid or viscous state that irreversibly turns into an insoluble and infusible polymer network by firing.
• polymer composite refers to a multi-component material comprising several different phase domains, among which at least one type of phase domain is a continuous phase and wherein at least one component is a polymer.
• these are panels, lids, shells or parts made of composite material for aircraft, boats (hull or deck), wagons , parts of motor vehicles or agricultural machinery (bodywork, hoods, doors), housings of electrical or electronic appliances.
• (meth) acrylic polymer there may be mentioned alkyl polymethacrylates or alkyl polyacrylates. According to a preferred embodiment, the polymer
• (meth) acrylic is polymethyl methacrylate (PMMA).
• PMMA refers to a homopolymer or copolymer of methyl methacrylate (MMA) or mixtures thereof.
• the homopolymer or copolymer of methyl methacrylate comprises at least 70%, preferably at least 80%, advantageously at least 90% and more advantageously at least 95% by weight. of methyl methacrylate.
• the PMMA is a mixture of at least one homopolymer and at least one MMA copolymer, or a mixture of at least two homopolymers or two MMA copolymers having an average molecular weight different, or a mixture of at least two MMA copolymers having a different monomer composition.
• the methyl methacrylate (MMA) copolymer comprises from 70% to 99.7% by weight of methyl methacrylate and from 0.3 to 30% by weight of at least one monomer containing at least one ethylenic unsaturation which can copolymerize with methyl methacrylate.
• alkyl (meth) acrylates in which the alkyl group contains from 1 to 12 carbon atoms.
• the alkyl group contains from 1 to 12 carbon atoms.
• the comonomer is an alkyl acrylate wherein the alkyl group contains from 1 to 4 carbon atoms.
• the methyl methacrylate (MMA) copolymer comprises from 80% to 99.7%, advantageously from 90% to 99.7% and more advantageously from 90% to 99.5% by weight. weight of methyl methacrylate and from 0.3% to 20%, advantageously from 0.3% to 10% and more preferably from 0.5% to 10% by weight of at least one monomer containing at least one ethylenic unsaturation which can copolymerize with methyl methacrylate.
• the comonomer is chosen from methyl acrylate or ethyl acrylate or mixtures thereof.
• the weight average molecular weight of the (meth) acrylic polymer must be high, which means greater than 50,000 g / mol, preferably greater than 100,000 g / mol.
• the weight average molecular weight can be measured by steric exclusion chromatography (SEC) or permeable gel chromatography (GPC).
• SEC steric exclusion chromatography
• GPC permeable gel chromatography
• the polymers are solubilized at 1 g / l in THF stabilized with BHT. Calibration is performed using monodisperse polystyrene standards.
• the monomer is selected from acrylic acid, methacrylic acid, alkyl acrylic monomers, alkyl methacrylic monomers and mixtures thereof.
• the monomer is selected from acrylic acid, methacrylic acid, alkyl acrylic monomers, alkyl methacrylic monomers and mixtures thereof, alkyl group containing from 1 to 22 carbons, linear, branched or cyclic; the alkyl group preferably containing 1 to 12 carbons, linear, branched or cyclic.
• the (meth) acrylic monomer is chosen from methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, methacrylic acid, acrylic acid, and the like.
• the (meth) acrylic monomer is selected from methyl methacrylate, isobornyl acrylate or acrylic acid and mixtures thereof.
• At least 50% by weight, preferably at least 60% by weight of the monomer is methyl methacrylate.
• % by weight of the monomer is a mixture of methyl methacrylate with isobornyl acrylate and / or acrylic acid.
• a fibrous substrate there may be mentioned fabrics, veils, felts or nonwovens which may be in the form of strips, webs, braids, locks or pieces.
• the fibrous material can have different shapes and dimensions, one-dimensional, two-dimensional or three-dimensional.
• a fibrous substrate comprises an assembly of one or more fibers. When the fibers are continuous, their assembly forms tissues.
• the one-dimensional form corresponds to long linear fibers.
• the fibers may be discontinuous or continuous.
• the fibers may be arranged randomly or in the form of a continuous filament in parallel with each other.
• a fiber is defined by its form factor, which is the ratio of the length and diameter of the fiber.
• the fibers used in the present invention are long fibers or continuous fibers.
• the fibers have a form factor of at least 1000, preferably at least 1500, more preferably at least 2000, preferably at least 3000, more preferably at least 5000. , even more advantageously at least 6000, still more preferably at least 7500 and most preferably at least 10,000.
• the two-dimensional form corresponds to fibrous mats or non-woven or woven reinforcements or bundles of fibers, which may also be braided. Even though the two-dimensional shape has a certain thickness and therefore has in principle a third dimension, it is considered two-dimensional according to the present invention.
• the three-dimensional shape corresponds, for example, to fibrous mats or non-woven reinforcements or bundles of fibers or their mixtures, stacked or folded, an assembly of the two-dimensional form in the third dimension.
• the origins of the fibrous material may be natural or synthetic.
• a natural material mention may be made of vegetable fibers, wood fibers, animal fibers or mineral fibers.
• Natural fibers are, for example, sisal, jute, hemp, flax, cotton, coconut fiber and banana fiber.
• Animal fibers are for example wool or hair.
• polymer fibers selected from thermosetting polymer fibers, thermoplastic polymers or mixtures thereof.
• the polymer fibers may consist of polyamide (aliphatic or aromatic), polyester, polyvinyl alcohol, polyolefins, polyurethanes, polyvinyl chloride, polyethylene, unsaturated polyesters, epoxy resins and esters of vinyl.
• the mineral fibers may also be chosen from glass fibers, especially of type E, R or S2, carbon fibers, boron fibers or silica fibers.
• the fibrous substrate of the present invention is chosen from vegetable fibers, wood fibers and fibers. animal fibers, mineral fibers, synthetic polymer fibers, glass fibers, carbon fibers or mixtures thereof.
• the fibrous substrate is chosen from mineral fibers.
• the fibers of the fibrous substrate have a diameter between 0.005 ⁇ and ⁇ , preferably between ⁇ and 50 ⁇ , more preferably between 5 ⁇ and 30 ⁇ and advantageously between ⁇ and 25 ⁇ .
• the fibers of the fibrous substrate of the present invention are chosen from continuous fibers (which means that the form factor is not necessarily applicable as for long fibers) for the one-dimensional shape, or for fibers long or continuous for the two-dimensional or three-dimensional form of the fibrous substrate.
• liquid (meth) acrylic syrup according to the invention which impregnates the fibrous substrate, it comprises a (meth) acrylic monomer or a mixture of monomers
• (meth) acrylic a (meth) acrylic polymer and at least one initiator or system initiating the start of polymerization of the (meth) acrylic monomer.
• the viscosity is increased by using a (meth) acrylic monomer or a mixture of a (meth) acrylic monomer with a dissolved (meth) acrylic polymer or a (meth) acrylic polymer. This solution is commonly known as “syrup” or "prepolymer"
• the liquid (meth) acrylic syrup must have a controlled viscosity for the impregnation process of the present invention, in particular for the correct and complete wetting and impregnation of the fibrous substrate.
• the liquid (meth) acrylic acid is in the range of 10 mPa * s to 10,000 mPa * s, preferably 50 mPa * s to 5000 mPa * s and preferably 100 mPa * s to 1000 mPa * s.
• the viscosity of the syrup can easily be measured with a rheometer or viscometer. The dynamic viscosity is measured at 25 ° C.
• (meth) acrylic liquid has a non-tonal behavior, which means that there is no dilution under shear, so that the dynamic viscosity is independent of the shear in a rheometer or the velocity of the moving part in a viscometer.
• the liquid (meth) acrylic syrup does not include solvent additives voluntarily.
• the liquid (meth) acrylic polymer is completely soluble in the (meth) acrylic monomer.
• This (meth) acrylic polymer is PMMA, that is to say the homo- or copolymer of methyl methacrylate (MMA) or their mixture as previously defined.
• the (meth) acrylic monomer is the same as defined above.
• (meth) acrylic preferably 50% by weight, preferably 60% by weight and more preferably 65% by weight of all (meth) acrylic syrup.
• the polymer or polymers of the liquid (meth) acrylic syrup is present at a level of at least 10% by weight and more preferably at least 20% by weight of the total (meth) acrylic syrup.
• the polymer or the polymers of the liquid (meth) acrylic syrup are present at most up to 60% by weight, preferably at most 50%, advantageously at most 40% and more advantageously at most 35% by weight of the all liquid syrup (meth) acrylic.
• the method of manufacturing composite parts is selected from resin transfer molding or infusion.
• Resin transfer molding is a process using a two-sided molding assembly that forms the two surfaces of a composite material.
• the bottom side is a rigid mold.
• the upper side may be a rigid or flexible mold.
• Flexible molds can be made from composite materials, silicone or extruded polymeric films such as nylon. Both sides snap together to form a molding cavity.
• the distinctive feature of resin transfer molding is that the fibrous substrate is placed in this cavity and the molding assembly is closed prior to syrup introduction
• Resin transfer molding includes many varieties that differ in the mechanics of introducing liquid (meth) acrylic syrup into the fibrous substrate in the molding cavity. These variations range from vacuum infusion to vacuum resin transfer molding.
• VARTM This process can be performed at room temperature or elevated.
• the liquid (meth) acrylic syrup must have the appropriate viscosity for this method of preparing the polymeric composite material.
• the liquid (meth) acrylic syrup is sucked into the fibrous substrate present in a special mold by applying a slight vacuum.
• the fibrous substrate is infused and completely impregnated with the liquid (meth) acrylic syrup.
• Another object of the invention is a multilayer composite material comprising:
• thermoplastic polymer one of which is a surface layer (1) comprising a thermoplastic polymer A
• a substrate layer (2) comprising a polymeric composite material comprising a thermoplastic (meth) acrylic polymeric matrix and a reinforcing fibrous material, said fibrous material consisting of long fibers and
• thermoplastic polymer and substrate layers at least one window in the thermoplastic polymer and substrate layers, said window being made of thermoplastic material consisting of the thermoplastic polymeric (meth) acrylic matrix or a thermoplastic material plate.
• the window or each window is filled with a transparent thermoplastic plate PET (polyethylene terephthalate), or polycarbonate, polystyrene, or preferably PMMA (polymethyl methacrylate).
• the composite material comprises an additional intermediate layer (3) between the surface layer (1) and the substrate layer (2), said intermediate layer comprising a thermoplastic polymer B.
• thermoplastic polymer A of the surface layer may be selected from the polymers of the following list:
• ABS acrylonitrile butadiene styrene copolymer
• SAN styrene-acrylonitrile copolymer
• ASA Acrylonitrile-styrene-acrylate copolymer
• PE Polyethylene
• PC polycarbonate
• PVDF Polyvinylidene fluoride
• Chlorinated PVC (CPVC)
• the surface layer may also comprise mixtures of two or more polymers from the thermoplastic polymer list above.
• the thermoplastic polymer A may comprise fillers or additives.
• additives mention may be made of organic additives such as impact modifiers or block copolymers, thermal stabilizers, flame retardant elements, and mixtures thereof.
• thermoplastic polymer A of the surface layer is chosen from (meth) acrylic polymers, acrylonitrile-styrene-acrylate copolymer (ASA), polyvinylidene fluoride (PVDF, polycarbonate (PC) or mixtures thereof .
• ASA acrylonitrile-styrene-acrylate copolymer
• PVDF polyvinylidene fluoride
• PC polycarbonate
• thermoplastic polymer A is chosen from (meth) acrylic polymers and preferably PMMA.
• thermoplastic polymer A of the surface layer may be in the form of a film, a plate, a sheet.
• thermoplastic polymer B of the intermediate layer may be selected from the polymers of the following list:
• ABS acrylonitrile butadiene styrene copolymer
• SAN styrene-acrylonitrile copolymer
• ASA Acrylonitrile-styrene-acrylate copolymer
• PE Polyethylene
• PC polycarbonate
• PVDF Polyvinylidene fluoride
• Chlorinated PVC (CPVC)
• the polymer of the intermediate layer may also comprise mixtures of two or more polymers B from the list of polymers B above. For example, blends of PET / PC, PMMA / PLA or ABS / PC blends.
• thermoplastic polymer B of the intermediate layer may comprise fillers or additives.
• Organic additives such as impact modifiers or block copolymers, thermal stabilizers, UV stabilizers, flame retardants and mixtures thereof may be mentioned as additives.
• thermoplastic polymer B is chosen from (meth) acrylic polymers, acrylonitrile butadiene styrene copolymer (ABS), acrylonitrile-styrene-acrylate copolymer (ASA), polyvinylidene fluoride (PVDF), polycarbonate ( PC) or their mixtures.
• ABS acrylonitrile butadiene styrene copolymer
• ASA acrylonitrile-styrene-acrylate copolymer
• PVDF polyvinylidene fluoride
• PC polycarbonate
• thermoplastic polymer B of the intermediate layer is an ABS or ASA.
• thermoplastic polymer B of the surface layer may be in the form of a film, a plate, a sheet.
• the thermoplastic (meth) acrylic matrix of the substrate layer of the polymeric composite material comprises at least one (meth) acrylic polymer comprising one or more (meth) acrylic monomers.
• the (meth) acrylic monomer or monomers represent at least 50% by weight or more, preferably 60% or more, advantageously 70% by weight and still more preferably 80% by weight of the thermoplastic (meth) acrylic matrix.
• the (meth) acrylic polymer or polymers are at least 80% by weight and preferably at least 90% by weight of the thermoplastic (meth) acrylic matrix.
• thermoplastic (meth) acrylic matrix comprises one or more (meth) acrylic polymers.
• the (meth) acrylic polymer mention may be made of polyalkyl methacrylate or alkyl polyacrylate.
• the (meth) acrylic polymer is an alkyl poly methacrylate.
• the composite parts thus manufactured mention may be made of automotive applications, nautical applications, railway applications, sports, aeronautical and aerospace applications, photovoltaic applications, computer applications, applications for telecommunications and applications for wind energy but also decorative objects.
• the composite part includes an automobile part, a boat part, a train piece, a sporting article, an airplane or helicopter part, a piece of spaceship or rocket, a piece photovoltaic module, a piece of wind turbine, a piece of furniture, a piece of construction or building, a piece of telephone or cell phone, a computer or television room, a printer and photocopier.
• FIG. 1 represents the diagram of a cross section AA of a multilayer composite material with a surface layer (1) comprising a thermoplastic polymer A, a substrate layer comprising a polymeric composite material (2) and a window 10 filled with a transparent thermoplastic material (20) in the thermoplastic polymer layers and substrate according to an object of the invention.
• the transparent thermoplastic material is obtained by a transparent thermoplastic plate or by polymerization of the impregnating syrup of the fibrous substrate.
• FIG. 2 shows the schematic of a cross-section of a multilayer composite material, comprising an additional intermediate layer (3) between the surface layer (1) and the substrate layer (2), said intermediate layer comprising a thermoplastic polymer B, the transparent thermoplastic material (20) filling the window passing through the layers
• FIG. 3 shows a perspective view of the material as seen in section in Fig. 1.
• Figure 4 shows a sectional view of a multilayer composite material according to the invention, comprising a window 10 having a non-transparent thermoplastic plate (21).

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Composite Materials (AREA)
• Mechanical Engineering (AREA)
• Laminated Bodies (AREA)
• Reinforced Plastic Materials (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Related Child Applications (2)

Publications (2)

Family

ID=48795653

Family Applications (1)

Country Status (5)

Cited By (5)

Families Citing this family (3)

Citations (8)

Family Cites Families (28)

• 2013
  • 2013-03-07 FR FR1352057A patent/FR3002877B1/fr not_active Expired - Fee Related
• 2014
  • 2014-03-07 EP EP14715039.5A patent/EP2964452B1/fr not_active Not-in-force
  • 2014-03-07 WO PCT/FR2014/050518 patent/WO2014135810A2/fr not_active Ceased
  • 2014-03-07 US US14/772,101 patent/US20150375464A1/en not_active Abandoned
  • 2014-03-07 JP JP2015560751A patent/JP7048199B2/ja active Active
• 2018
  • 2018-06-04 US US15/997,026 patent/US11040504B2/en not_active Expired - Fee Related

Patent Citations (8)

Also Published As

Similar Documents

Legal Events