Polyamide release film for sheet molding compound
US4444829A · kind A · utility
20Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1980 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Dec 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- 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.