Photographic film base comprising a poly(ethylene terephthalate)-based material
US6558884B1 · kind B1 · utility
11Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2005/168
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to a poly(ethylene terephthalate)-based photographic film base having improved properties with regard to cutting, perforating, and other finishing or phototofinishing operations. The film base comprises a material in which a specified amount of monomeric units derived from 1,4-cyclohexane dimethanol (CHDM), such that the film base has a specified cutting-related property. The level of CHDM in the PET-based polyester material can be adjusted either by physical blending of polyesters containing CHDM monomeric units or by synthetic incorporation of CHDM monomer units into a PET-based polyester backbone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.