Multilayer shrink film with polystyrene and polyethylene layers
US7192636B2 · kind B2 · utility
3Cited by
25References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2003 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Dec 9, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multilayer shrink film and methods of making same comprising one or more polyethylenic layers, one or more polystyrenic layer and polystyrene compatibilizing layers situate between each polyethylenic layer and polystyrenic layer wherein the polystyrene compatibilizing layers comprise less than 1% by weight substantially random interpolymer. The multilayer shrink films of the invention are produced using film biaxial orienting means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.