Films prepared from plasticized polyesters
US7030181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Oct 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/49029
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A film or sheet having a glass transition temperature below about 23° C. and a melting temperature greater than about 120° C. is prepared by first preparing a polyester composition of about 50 to about 95 weight percent of a base copolyester having a melting temperature of less than about 220° C. and exhibiting more than about 1 percent crystallinity after annealing for 2000 minutes at a temperature of which the base copolyester has a maximum crystallization rate; and about 5 to about 50 weight percent of a plasticizer suitable for use with the base copolyester. The polyester composition is formed into a film or sheet. During formation of the film or sheet or afterwards, crystallization is induced to provide a soft and flexible film or sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.