Biaxially oriented and heat-set multilayer thermoplastic film for packaging
US7063885B2 · kind B2 · utility
1Cited by
8References
15Claims
0Family size
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Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | May 18, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3175
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A multi-layer, thermoplastic film bi-axially oriented at a stretching ratio ≧ to about 3.0:1 in the machine direction and at a stretching ratio ≧ about 6.0:1 in the transverse direction, which film comprises a layer a) comprising at least 50 wt. % of a crystalline or partially crystalline co-polyamide characterized by a Tg≦100° C. and at least one outer heat-sealing layer b) comprising a polyolefin, said film being further characterized in that it has a % free shrink at 100° C.≦3 in each direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.