Biaxially oriented polyester film for lamination onto metal sheet
US5686510A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1994 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Nov 10, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A biaxially oriented polyester film made of a polyester composition, (A) which polyester composition comprises (a) an aromatic copolyester having a melting point of 210-245.degree. C., (b) first inert fine solid particles having an average particle diameter of 0.05 to 0.6 .mu.m, and (c) second inert fine solid particles having an average particle diameter of 0.3 to 2.5 .mu.m, the ratio of the average particle diameter of the second inert fine solid particles to the average particle diameter of the first inert fine solid particles being at least 2.5, and the amounts of the components (b) and (c) being 0.01 to 3% by weight and 0.001 to 0.2% by weight, respectively, based on the total weight of the components (a), (b) and (c); (B) which polyester film has a plane orientation coefficient of 0.08 to 0.16; and, (C) which polyester film shows excellent moldability when laminated onto a metal sheet and subjected to deep drawing. A can for drinks, foods, etc. having excellent heat resistance and flavor-retaining property can be produced from a metal sheet onto which the above biaxially oriented polyester film is laminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.