Heat shrinkable film and process for preparing the same
US4354997A · kind A · utility
31Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Aug 11, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for simultaneously, biaxially orienting tubular ethylene polymer film by expansion and extension of the tube under particular conditions for heating the expanding tube, to give a heat shrinkable film. The heat shrinkable film has excellent heat shrinkability, shrinkage stress, transparency, heat sealability and impact resistance, and is very suited for use in shrink packaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.