Process to produce sheet molding compound using a polyamide release film
US4568505A · kind A · utility
7Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Jan 23, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2309/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a polyamide film of low crystallinity suitable for use in the manufacture of sheet molding compound (SMC). The sheet is produced from a blend comprising a polyamide selected from the group consisting of polyepsiloncaprolactam, polyhexamethylene adipamide or mixtures thereof, and about 10 to 30 wt. %, based on the total weight of said blend, of a polyolefin compound, or copolymer thereof, such as ethylene-vinyl acetate copolymer. The film has a tear strength of at least about 400 grams in the longitudinal direction as measured by ASTM D-1004-66.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.