Composite thermoplastic films and a process for their preparation
US4409286A · kind A · utility
11Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 17, 1982 |
| Grant date | Oct 11, 1983 |
| Priority date | — |
| Expiry date | May 17, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A composite film for packaging foods having at least one layer of a thermoplastic film of low density polyethylene, polypropylene, polybutene, polyamide, polystyrene or polyvinyl chloride having a thickness between 25 and 3,000 .mu.m, and another layer of a terpolymer film having a thickness between 10 and 100 .mu.m. The terpolymer film contains from 88 to 98.7 mol % of units derived from ethylene, from 1 to 10 mol % of units derived from an ester of an alkyl acrylate or an alkyl methacrylate, the alkyl group having from 1 to 6 carbon atoms, and from 0.3 to 3 mol % of units derived from maleic anhydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.