METHOD OF MANUFACTURING A FIBROUS MATERIAL PREIMPREGNATED WITH THERMOPLASTIC POLYMER USING AN AQUEOUS DISPERSION OF POLYMER

摘要

A method of manufacturing a pre-impregnated fibrous material produced as a plurality of unidirectional parallel tapes, said method including the following steps: i) impregnation of the fibrous material while it is in the form of several parallel rovings, said impregnation step including: ia) immersion in a bath containing an aqueous dispersion of thermoplastic polymer, said immersion being followed by ib) drying, then ii) shaping by calendering, using at least one heated calender, into the form of a plurality of unidirectional parallel tapes using said calender including a plurality of calendering grooves according to the number of said tapes and with a pressure and/or separation between the rolls of said calender regulated by a control system.

主权项

1. A method of producing a pre-impregnated fibrous material comprising a fibrous material of continuous fibres and a thermoplastic polymer matrix, wherein said pre-impregnated fibrous material is produced in a plurality of parallel unidirectional ribbons, wherein said method comprises the following steps:
i) an impregnation step of said fibrous material in the form of several parallel rovings, said impregnation step comprising:
ia) immersion of said fibrous material in a bath containing an aqueous dispersion of said thermoplastic polymer, said immersion being followed by:ib) drying of said fibrous material, then ii) a forming step of said parallel rovings of said fibrous material impregnated at step i), via calendering by means of at least one heating calender (51, 52, 53), into the form of a plurality of parallel unidirectional ribbons, said heating calender comprising a plurality of calendering grooves, the pressure and/or spacing between the rollers of said calender being regulated by a servo system.