Biaxially oriented polyester film to be laminated onto a metal plate and molded
US6086989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1998 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Jun 10, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A biaxially oriented polyester film to be laminated onto a metal plate and molded, which comprises a copolyester, said copolyester comprising (a) terephthalic acid in an amount of 82 to 100 mol % and 2,6-naphthalenedicarboxylic acid or a combination of 2,6-naphthalenedicarboxylic acid and other dicarboxylic acids in an amount of 0 to 18 mol % of the total of all dicarboxylic acid components and (b) ethylene glycol in an amount of 82 to 100 mol % and cyclohexanedimethanol or a combination of cyclohexanedimethanol and other diols in an amount of 0 to 18 mol % of the total of all diol components, and having (c) a glass transition temperature of 78.degree. C. or higher and (d) a melting point of 210 to 250.degree. C. The said film has the following relationship between the highest peak temperature (Te, .degree. C.) of loss elastic modulus and the glass transition temperature (Tg, .degree. C.): Te-Tg.ltoreq.30, or its content of a free dicarboxylic acid diol ester is 50 ppm or less. The said film has improved flavor retention properties for its contents taste, particularly taste and flavor retention properties after a retort treatment, while retaining excellent moldability, heat resista…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.