Thermo-shrinkable polyester type film and tube and processing method for preparing the tube
US4963418A · kind A · utility
44Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Jan 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1328
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thermo-shrinkable polyester type film having the following shrinking properties: PA1 a shrinking ratio in one axis is not less than 30% at 80.degree. C. and not less than 50% at 100.degree. C., and PA1 a shrinking ratio in a perpendicular axis to the former axis shows the minimum value at a temperature range of 80.degree..+-.25.degree. C., and the process therefor. PA1 This film shows an excellent shrinking properties for packaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.