Atochem

Alain Causier

Michel Glemet

Gilles Cognet

Michel Lottiau

Bernard Gourdon

In the process for manufacturing thermoplastic polymer articles reinforced with long continuous fibers by pultrusion, including impregnating tufts of fibers with thermoplastic resin, circulating an assemblage of said impregnated tufts in a heat assembly so as to melt the resin, and then hot shaping the article in an appropriate die to give it essentially its final shape before passing it through a second cooling die, the improvement including compressing the assemblage of impregnated tufts in the heated assembly consisting essentially of a flat die having an inlet zone and an exit zone, the inlet being wide enough to allow the initial volume of the impregnated tufts to pass through and a horizontal gap adapted to be varied in thickness, and allowing the emerging assembly of impregnated tufts to be brought to the shape of a sheet of minmimium thickness before shaping, and the flat die and rigid polyvinyl chloride article prepared by the process.

Pultrusion process

In the process for the manufacture of a polyamide composite material reinforced with long fibers, the improvement comprising impregnating the fibers with a polyamide oligomer or prepolymer, heat-treating the impregnated fiber to increase the length of the polymer chain, and then shaping the impregnated fiber by pultrusion.

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Bernay, France

Alain Causier