Heat-laminable multi-layer film
US6489038B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Dec 24, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layered film that may be heat laminated to a substrate is described. The multi-layered film comprises a base layer comprising polypropylene, a first external layer comprising polypropylene, and a second external layer. The base layer is interposed between the first and second external layers. The second external layer comprises a mixture of first (i) and second (ii) ethylene vinyl acetate (EVA) copolymers, each having different vinyl acetate residue contents. The content of vinyl acetate residues in the first EVA copolymer (i) is 10 to 30 percent by weight, based on the weight of the first copolymer (i), the content of vinyl acetate residues in the second EVA copolymer (ii) is 1 to 10 percent by weight, based on the weight of the second copolymer (ii). The multi-layered film is heat laminated and oriented at least monoaxially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.