Tear-resistant polyester film and laminated sheets comprised of the same
US5173357A · kind A · utility
19Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | May 29, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3179
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Polyester film has a thickness of between 10 to 500 .mu.m and exhibits excellent tear strength retention against thermal history conditions. The film is prepared from a resin composition which includes 100 parts by weight of a polyester consisting essentially of alkylene terephthalate groups as the main recurring units in the polymer chain and between 0.1 to 5 parts by weight of a bisoxazoline compound incorporated thereinto. The film is usefully employed as a sterilizing bag or as a food-packaging material and can be laminated to anther sheet of film or to paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.