Method of producing a photographic polyester laminate support
US5631124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1995 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | Jan 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24967
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of producing a photographic polyester laminate support having a laminate of layers of at least two kinds of polyesters can provide low formation of scratches in a camera and a curl in the film's width direction. In the support, the glass transition temperature (Tg) of each polyester of the laminate is within the range of from 90.degree. C. to 200.degree. C. and the laminate is subjected to heat-fixing in a temperature range as defined by formula (1): EQU Heat-fixing temperature (.degree.C.)=(Tm(L)-50) to (Tm(H)-10)formula (1) wherein Tm(H)(.degree.C.) means the highest melting temperature of polyesters that constitute the laminate support, and Tm(L)(.degree.C.) means the lowest melting temperature of polyesters that constitute the laminate support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.