Sandwich structure comprising outer films having low permeability to hydrocarbons
US6068934A · kind A · utility
3Cited by
5References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1999 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Jan 12, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31757
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a sheet molding compound consisting in a sandwich structure comprising a central layer of reinforced uncured heat hardenable sheet molding compound; and two outer layers of a release film having low permeability to hydrocarbons comprising at least one layer (i) of a polyamide/polyolefin alloy having a polyamide matrix and at least one layer (ii) of a polyolefin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.