Thermoformable heat-sealable PET sheet material
US8617673B1 · kind B1 · utility
8Cited by
40References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2010 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Apr 13, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A sheet for thermoforming is comprised of a material which is compatible with PET and which has slower crystallinity and a crystallization temperature which is at least 77° C. greater than its glass transition temperature, more preferably a crystallization temperature greater than 151° C. The material may be coextruded into a sheet with a first PET material, such that when thermoformed into a formed part the layers of second material are engaged with each other in the molded parts and for being subjected to heat sealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.