Method of producing a fibrous material pre-impregnated with thermoplastic polymer in a fluid bed
US10974418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2015 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Sep 15, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing a pre-impregnated fibrous material including a fibrous material of continuous fibres and a thermoplastic polymer matrix, wherein the pre-impregnated fibrous material is produced in a single unidirectional strip or in a plurality of parallel unidirectional strips, the method including 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; and (ii) shaping the strand or parallel strands of the fibrous material impregnated as in step (i) by calendering by at least one heating calender in the form of a single unidirectional strip or of a plurality of parallel unidirectional strips, the heating calender, in the latter case, including a plurality of calendering grooves, and the pressure and/or a spacing between the rollers of the calender being regulated by an auxiliary system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.