Atochem

L'etat Francais

Atochem Sa La Defense

Roland A Ganga

Jacques Grossoleil

Jean-Paul Merval

Michel Leone

Robert F Carbone

A composite material the characteristics of which can be modulated by preimpregnation of a continuous fiber. It is characterized in that it is comprised of a sheath and a core consisting of continuous fibers, a powder and a filler the melting temperature of which is higher than at least the highest melting temperature of the other constituents of the material. Applicable notably in the radioelectric fields and to radomes in particular.

Composite material the characteristics of which can be modulated by

Solid particles are coated with a uniform and continuous polyamide layer by immersion in a reaction medium capable of forming polyamides by anionic polymerization in solution.

Polyamide-coated particles and process for their preparation

Composite material comprising a flexible sheath covering a roving of fibers impregnated to the core with a finely powdered thermoplastic, the melting point of which thermoplastic is equal to or greater than that of the sheathing material, together with process and apparatus for producing same by using an extrusion coating technique, the coating die being mounted on a leakproof powder fluidization tank via a blowing chamber thermally insulated from the tank.

Apparatus for producing flexible composite material

Flexible composite material and process for producing same

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Roland A Ganga