| 摘要 |
The invention relates to a method of producing a pre-impregnated fibrous material comprising a fibrous material consisting of continuous fibres and a thermoplastic polymer matrix, characterized in that the pre-impregnated fibrous material is produced in a single unidirectional strip or in a plurality of parallel unidirectional strips, and in that the method comprises 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 (22); and (ii) shaping the strand or parallel strands of the fibrous material impregnated as in step (i) by calendering by means of at least one heating calender (51, 52, 53) in the form of a single unidirectional strip or of a plurality of parallel unidirectional strips, the heating calender, in the latter case, comprising a plurality of calendering grooves (73), preferably up to 200 calendering grooves, corresponding to the number of strips, and the pressure and/or a spacing between the rollers of the calender being regulated by an auxiliary system. |
