Heat sealable, multi-ply polypropylene film
US4390385A · kind A · utility
34Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1981 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Nov 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A heat sealable and shrinkable, coextruded, multi-layer packaging film having a propylene homopolymer base layer and a skin layer of a preferred blend of 60% to 80% propylene-ethylene copolymer with propylene homopolymer provides a sealing temperature range of up to 30.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.