Multiple-layer polyolefin films
US5204180A · kind A · utility
3Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1992 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Jan 31, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multiple-layer film comprises an oriented propylene polymer substrate having on opposed surfaces thereof, respectively, a first vinylidene halide copolymer having a Tg of up to 25.degree. C. and a molecular weight not exceeding 135,000 and a second vinylidene halide copolymer having a Tg greater than that of the first copolymer. Such films offer excellent sealing profile, blocking resistance, gas-barrier, humid ageing and printing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.