Heat-sealable multi-layer films of polyolefins
US4842930A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Jul 13, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Heat-sealable, at least monoaxially orientated multi-layer film of a base layer of a polypropylene and at least one heat-sealable layer of PA0 1. 35 to 70% by weight, preferably 38 to 60% by weight, of olefin polymers of PA1 (A) at least one terpolymer consisting of PA2 (a) 65 to 82% by weight of propylene, PA2 (b) 25 to 14% by weight of butene-1, PA2 (c) 10 to 4% by weight of ethylene, and PA1 (B) 0 to 7% by weight of a copolymer of ethylene and butene-1, PA1 wherein the sum of (A) and (B) or of (a) to (c) must always give 100% by weight and the monomer content of components (A) and (B) must always give 65 to 82% by weight of propylene, 25 to 14% by weight of butene-1 and 10 to 4% by weight of ethylene, PA0 2. 65 to 30% by weight, preferably 62 to 40% by weight, of a propylene/ethylene copolymer with 2 to 6% by weight of ethylene, wherein the sum of 1. and 2. must always give 100% by weight, and PA0 3. if appropriate customary auxiliaries and additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.