Photographic film base comprising a poly(ethylene terephthalate)-based material
US6555303B1 · kind B1 · utility
3Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/41
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a poly(ethylene terephthalate)-based photographic film base having improved properties with regard to slitting, perforating, and other finishing or cutting operations. The film base comprises a polyester material in which a specified amount of monomer units derived from 1,4-cyclohexane dimethanol (CHDM), such that the film base has a specified cutting-related property. The level of CHDM can be adjusted in the PET-based polyester material either by physical blending of polyesters containing CHDM monomer 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.