Fiber reinforced multi-ply stampable thermoplastic sheet
US4240857A · kind A · utility
15Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1978 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Aug 8, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1039
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Reinforced thermoplastic polymer composite sheets, formable into smooth, shaped objects in a stamping process. The composite sheet is produced by laminating together (1) a first layer of thermoplastic resin containing short glass fibers and a mineral filler such as kaolin, (2) a backing reinforcing layer comprising a long glass mat impregnated by thermoplastic resin and (3) optionally a third layer similar to said first layer. The long glass mat is positioned within the reinforcing layer during impregnation, whereby the mat becomes encased in a resin matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.