Hexcel Reinforcements

France

Hexcel Reinforcements

France
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The present invention concerns a multilayer element comprising a reinforcing material suitable for producing composite parts combined on at least one of the faces of same with a support layer characterised in that the reinforcing material and the support layer are combined by means of electrostatic forces, and a method for preparing such a material and a method for producing a composite part produced from at least one reinforcing material obtained from such an element, after having removed the support layer.


Patent
Hexcel Reinforcements | Date: 2015-11-03

The present invention provides a tape with a given width, said tape being composed of an assembly of filaments extending in a direction substantially parallel to the length of the tape, and between which a powder of a polymeric material is distributed, each face of said tape being associated with a nonwoven of polymeric fibers.


Patent
Hexcel Reinforcements | Date: 2014-03-06

A method for spreading a textile sheet where the sheet is caused to run between at least two rotary rollers, the axes of which extend parallel to each other and substantially perpendicular to the running direction of sheet. The sheet under pressure is caused to pass between at least. one pressure generator of the rollers driven into axial oscillation and in phase opposition. At least one pressure generator of the rollers has adjustable pressure values along the generator in order to spread the sheet with a low thickness variability.


A process for making a material adapted for the production of composite parts by a process in which a thermoplastic or thermosetting matrix is diffused within said material. The material includes at least one sheet of unidirectional carbon fibres associated on at least one of its faces with at least one conductive component associated or integrated with a permeable layer in a thermoplastic material or in a mixture of thermoplastic or thermosetting materials.


Fabric having warp and weft yarns where the filaments in the yarns freely move relatively to each other. The basis weight of the fabric is related to the thickness standard deviation of a stack of three identical fabrics deposited on each other. For basis weights greater than or equal to 40 g/m^(2 )and less than 100 g/m^(2), the thickness standard deviation is less than or equal to 35 m. For basis weights greater than or equal to 100 g/m^(2 )and less than or equal to 160 g/m^(2), the thickness standard deviation is less than or equal to 50 m. For basis weights greater than 160 g/m^(2 )and less than or equal to 200 g/m^(2), the thickness standard deviation is less than or equal to 60 m. For basis weights greater than 200 g/m^(2 )and less than or equal to 400 g/m^(2), the thickness standard deviation is less than or equal to 90 m.


The invention relates to a material (I) adapted for the production of composite parts by a process in which a thermoplastic or thermosetting matrix is diffused within said material, comprising at least one sheet (1) of unidirectional carbon fibres (2) associated on at least one of its faces with at least one conductive component (5) associated or integrated with a permeable layer (3a, 3b, 10) in a thermoplastic material or in a mixture of thermoplastic or thermosetting materials, said permeable layer being in the form of a fabric, a powder, a porous film, a knit, or, preferably, a non-woven (3a, 3b, 10), a process for fabricating composite parts using such a material and the composite parts that can be obtained by such a process.


The present invention relates especially to an intermediate material comprising, or even constituted exclusively by, an array of individualised ribbons, each ribbon being composed by a tape of unidirectional reinforcing fibres associated, by adhesion, on each of its faces with a veil of thermoplastic fibres, characterised in that the ribbons are disposed in successive layers, in such a way that the ribbons of two successive layers are superposed with or without crossing but without interlacement, the bond between a ribbon and the ribbon or ribbons with which it is superposed being ensured by adhesion, and in that in each layer the ribbons are disposed substantially parallel to each other over at least the major part of their length, while being independent and spaced from each other and in that the ribbons of at least two layers extend in two different directions.


Patent
Hexcel Reinforcements | Date: 2014-02-25

The invention relates to a composite material in which at least one reinforcement thread is deposited on a surface according to a path having at least one curved area on the deposition surface, wherein the reinforcement thread is connected to the surface by a polymeric binder. A twist is applied to the reinforcement thread before the deposition thereof at least in order to compensate the length differences of the extreme paths of the thread on either side of the width as measured in a direction parallel to the deposition surface.


Patent
Hexcel Reinforcements | Date: 2016-06-30

The present invention concerns preforms made with a new intermediate material composed of a unidirectional layer of carbon fibers with a weight of 100 to 280 g/m^(2), associated on each of its faces, with a web of thermoplastic fibers having a thickness of 0.5 to 50 microns, preferably 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns, and a process for manufacturing composite parts from such preforms and the resulting composite parts.


The present invention relates to a method for continuously applying on a deposition surface of an intermediate material composed of a unidirectional layer of reinforcing fibers associated on at least one of its faces to a layer of thermoplastic and/or thermosetting material that does not represent more than 10% of the total weight of the intermediate material.

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