Producing low shrink packaging film
US5152946A · kind A · utility
39Cited by
13References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Jan 30, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0053
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Biaxially oriented film is post-treated by an annealing process in a limited temperature range of 45.degree. C. to 120.degree. C. for various time periods based on the temperature for annealing in order to produce a film having less than a 0.2% shrinkage in the machine direction as measured at 51.7.degree. C. for 24 hours. This film has a wide range of uses, such as overwrapping film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.