Process for making fibre reinforced products
US4783349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1985 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Feb 19, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2918
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing a fibre reinforced structure by melt impregnation of continuous fibres with a thermoformable polymer melt comprising pre-wetting the filaments of the fibres with a composition containing a melt plasticizer for the thermoformable polymer, prior to introducing the pre-wetted fibres into the melt, optionally removing the plasticizer when the composition contains a polymer miscible with plasticizer to leave polymer coated filaments and introducing the pre-wetted filaments into a polymer melt, optionally a polymer melt containing a metal plasticizer for the melt and preferably removing the plasticizer from the composition by volatilization. The pre-wetted polymer coated filaments are useful materials as reinforcing fibres for use in processes other than direct melt impregnation. They can be used in the process known as film stacking impregnation or in processes involving initial impregnation using particulate polymers or alternatively in conventional extrusion compounding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.