FIBROUS MATERIAL IMPREGNATED WITH THERMOPLASTIC POLYMER OF THICKNESS LESS THAN OR EQUAL TO 100ΜM AND ITS PREPARATION PROCESS

摘要

The present invention relates to an impregnated fibrous material comprising at least one continuous fiber fibrous material and: - at least one non-reactive thermoplastic polymer matrix, or - at least one reactive thermoplastic prepolymer, precursor of said non-reactive thermoplastic polymer, optionally mixed with a chain extender, characterized in that said at least non-reactive thermoplastic polymer or said reactive prepolymer is an amorphous polymer or prepolymer whose glass transition temperature is such that Tg ≥ 80 ° C, in particular Tg ≥ 100 ° C, in particular ≥ 120 ° C, in particular ≥ 140 ° C, or is a semi-crystalline polymer or prepolymer with a melting point Tf ≥ 150 ° C, the fiber content in said prepreg fibrous material being from 45 to 65% in volume, preferably from 50 to 60% by volume, in particular from 54 to 60%, the average thickness of said impregnated fibrous material being less than or equal to 100 μm, independently of the number of fibers present ntes in said fibrous material before impregnation.