Packaging sheet for elevated-temperature use
US10384854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2017 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Oct 5, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/80
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A packaging sheet is described. The sheet comprises a first layer comprising a first copolyester having a glass transition temperature of from 70° C. to 90° C. and an intrinsic viscosity of from 0.70 dl/g to 0.90 dl/g. The first copolyester comprises from 50% to 85% by volume of the sheet. The sheet also comprises a second layer comprising a second copolyester having a glass transition temperature of equal to or greater than 112° C. The second copolyester comprises from 15% to 50% by volume of the sheet. The sheet is thermally stable after exposure to temperatures up to 112° C. Various embodiments of the sheet are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.