Arkema France

Centre National De La Recherche Scientifique

Patrice Gaillard

Gilles Hochstetter

Thibaut Savart

Arthur Pierre Babeau

Serge Bordere

Mathieu Capelot

Denis Huze

François Tanguy

Dominique Plee

Daniel Cochard

Axel Salinier

Eric Dutilh

Anthony Florencie

Alexander Korzhenko

Philippe Poulin

Patrick Delprat

Andriy Tymoshenko

André Lozowski

Damien Voiry

Carole Baddour

Anatolly Goryashkin

Dimitry Zakharov

Oleksadr Korzhenko

Mickael Havel

Pierre Miaudet

Patrick Piccione

Carine Perrot

Thibault Savart

An impregnated fibrous material including at least one fibrous material of continuous fibers and: at least one non-reactive thermoplastic polymer matrix, or at least one reactive thermoplastic prepolymer, which is a precursor of the non-reactive thermoplastic polymer, optionally mixed with a chain extender, wherein the at least one non-reactive thermoplastic polymer or the reactive prepolymer is an amorphous polymer or prepolymer having a glass transition temperature such that Tg≥80° C., or is a semi-crystalline polymer or prepolymer having a melting temperature Tf≥150° C., the fiber content in the pre-impregnated fibrous material being between 45 and 65 volume %, and the average thickness of the impregnated fibrous material being less than or equal to 100 μm, independently of the number of fibers present in the fibrous material before impregnation.

Fibrous material impregnated with thermoplastic polymer having a thickness of less than or equal to 100MM and method for the production thereof

The invention relates to a process for manufacturing a pre-impregnated fibrous material comprising a continuous fibre fibrous material and at least one thermoplastic polymer matrix, characterized in that said pre-impregnated fibrous material is made of a single unidirectional ribbon or a plurality of parallel ribbons unidirectional and in that said method comprises an impregnation step, in particular at the core, of said fibrous material being in the form of a roving or of several parallel rovings by said thermoplastic polymer being in powder form, said step of impregnation being carried out with said at least one thermoplastic polymer and said fibrous material the D90/D10 ratio of which by volume of the thermoplastic polymer particles ranges from 1.5 to 50, in particular from 2 to 10 and the ratio of the average diameter by volume (D50) thermoplastic polymer particles on the average diameter of the unit fibres of said fibrous material ranges from 3 to 40, except for an impregnation process in aqueous suspension of a fibrous material made of carbon fibres by a thermoplastic polymer, said D50/mean unit fibre diameter ratio being comprised from 3 to 8, and excluding any electrostatic process in voluntary charge.

Process for manufacturing a fibrous material pre-impregnated with thermoplastic polymer in powder form

A method of manufacturing an impregnated fibrous material including a fibrous material made of continuous fibers and at least one thermoplastic polymer matrix, the method including pre-impregnating the fibrous material while it is in the form of a roving or several parallel rovings with the thermoplastic material and heating the thermoplastic matrix for melting, or maintaining in the molten state, the thermoplastic polymer after pre-impregnation, the at least one heating step being carried out by means of at least one heat-conducting spreading part (E) and at least one heating system, with the exception of a heated calendar, the roving or the rovings being in contact with part or all of the surface of the at least one spreading part (E) and partially or wholly passing over the surface of the at least one spreading part (E) at the level of the heating system.

Method for manufacturing a fibrous material impregnated with thermoplastic polymer

A web of impregnated fibrous material(s) including N individual tapes of fibrous material(s) stacked and/or joined in relation to one another, in which said N tapes adhere to each other and can overlap at least partially. The tapes of fibrous material(s) include continuous fibers impregnated with at least one thermoplastic polymer, and optionally a chain extender. The web has a surface, in cross-section perpendicular to the axis of the fibers, S, that is substantially equal to the sum of the surface, in cross-section perpendicular to the axis of the fibers, of each initial individual tape, denoted S, Sbeing equal to N&#xd7;l&#xd7;Ep, wherein l represents the average width of a tape and Ep represents the average thickness of a tape, N being between 2 and 2000, and the average thickness of each individual tape being less than or equal to 150 &#x3bc;m.

Web of impregnated fibrous material, production method thereof and use of same for the production of three-dimensional composite parts

The invention relates to a process for manufacturing a preimpregnated fibrous material containing a fibrous material made of continuous fibers and at least one thermoplastic polymer matrix, wherein the preimpregnated fibrous material is produced as a single unidirectional tape or of a plurality of parallel unidirectional tapes and wherein the process includes a step of impregnating, in particular fully and homogeneously, the fibrous material that is in the form of a roving or of several parallel rovings with the at least one thermoplastic polymer matrix that is in powder form, the impregnating step being carried out by a dry route in a tank and the control of the amount of the at least one thermoplastic polymer matrix in said fibrous material being achieved by control of the residence time of said fibrous material in the powder, with the exclusion of any electrostatic process with intentional charging.

Fluidized-bed process for manufacturing a fibrous material preimpregnated with thermoplastic polymer

A method of producing a pre-impregnated fibrous material including a fibrous material of continuous fibres and a thermoplastic polymer matrix, wherein the pre-impregnated fibrous material is produced in a single unidirectional strip or in a plurality of parallel unidirectional strips, the method including the following steps: (i) impregnating the fibrous material in the form of a strand or a plurality of parallel strands with the thermoplastic polymer in the form of a powder in a fluid bed; and (ii) shaping the strand or parallel strands of the fibrous material impregnated as in step (i) by calendering by at least one heating calender in the form of a single unidirectional strip or of a plurality of parallel unidirectional strips, the heating calender, in the latter case, including a plurality of calendering grooves, and the pressure and/or a spacing between the rollers of the calender being regulated by an auxiliary system.

Method of producing a fibrous material pre-impregnated with thermoplastic polymer in a fluid bed

An impregnated fibrous material comprising a fibrous material made of continuous fiber and at least one thermoplastic polymer matrix, wherein the at least one thermoplastic polymer is an non-reactive amorphous polymer, the glass transition temperature of which is such that Tg&#x2265;80&#xb0; C., or a non-reactive semi-crystalline polymer, the melting temperature of which is Tf&#x2265;150&#xb0; C., the fiber volume ratio is constant in at least 70% of the volume of the tape or ribbon, the fiber ratio in the pre-impregnated fibrous material ranging from 45 to 65% by volume, the porosity rate in the pre-impregnated fibrous material being less than 10%.

Fibrous material impregnated with thermoplastic polymer

A method for manufacturing a continuous carbon fiber from a precursor material. According to this method, a precursor material including a continuous natural fiber and carbon nanofillers is used, said natural fiber being obtained from at least one plant constituent such as a cellulose. A process for manufacturing a continuous carbon fiber from a precursor material, including a step of carbonization of said precursor material, in which the precursor material includes a continuous natural fiber and carbon nanofillers, said natural fiber being obtained from at least one plant constituent, wherein it also includes a step of sizing the precursor material before the carbonization step.

Method for manufacturing a carbon fibre, precursor material used by the method and carbon fibre obtained

The invention relates to a method for filling a receptacle () with carbon nanotubes from another receptacle () whereby the CNTs are passed from one receptacle to the other by means of a coupling () comprising a double-valve device (), each valve being coupled to one of the receptacles, the valves () closing independently and tightly and being openable only when they are coupled to one another.

Method for safe filling with carbon nanotubes, filling system and industrial plant employing this method

An industrial process and an apparatus for fabricating carbon nanotubes (CNTs) is provided, comprising synthesis of the carbon nanotubes by decomposing a carbon source brought into contact, in a fluidized-bed reactor, whereby the carbon nanotubes synthesized in the reactor and fixed onto the grains of catalytic substrate in the form of an entangled three-dimensional network, forming agglomerates constituting the CNT powder, are recovered sequentially by discharging them while hot, that is to say at the reaction temperature for synthesizing the CNTs, at the foot of the reactor, the sequence in which the discharges are carried out corresponding to the frequency of filling of the reactor.

Process for fabricating carbon nanotubes and apparatus for implementing the process

A subject of the present invention is a process for producing carbon nanotubes, the process comprising: The invention also relates to nanotubes capable of being obtained according to the abovementioned process, which can be advantageously used in all the known fields of application of carbon nanotubes.

Process for producing carbon nanotubes from renewable raw materials

The present invention relates to a process for preparing CNTs by bringing a carbon source into contact with a multivalent metal and/or metal-oxide-based catalyst deposited on an inorganic substrate having a BET specific surface area of greater than 50 m/g. The CNTs obtained may be used as agents for improving the mechanical and electrical conductivity properties in polymeric compositions.

Method for synthesis of carbon nanotubes

The invention relates to a method for synthesis of carbon nanotubes of the highest carbon purity by the process of vapour phase chemical deposition. The nanotubes produced can be used to advantage in all know applications of carbon nanotubes.

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Hagetaubin, France

Patrice Gaillard