Photographic multilayer film base comprising 1,4-cyclohexane dimethanol
US6670110B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2002 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Dec 20, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
This invention relates to a poly(ethylene terephthalate) photographic multilayer film base having improved properties with regard to cutting, stiffness and curl property. The multilayer film base comprises a multilayer structure, in which a tie layer comprises a PET-based polyester material having a specified amount of monomeric units derived from 1,4-cyclohexanedimethanol (CHDM), such that the support layers of the multilayer film base does not delaminate. This PET-based polyester material can be obtained either by the addition/blending of polyester polymers containing CHDM monomeric units to PET material and/or the incorporation of CHDM monomer units into a PET-polymer backbone at appropriate levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.