Graphic film having a copolyester primed polyester film as its substrate
US4745019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Jan 23, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A primer coated, oriented polyester film material is provided wherein the primer is applied in an aqueous medium comprising a water dispersible copolyester consisting essentially of the condensation product of components A, B, C, and D or their polyester forming equivalents as follows: PA0 (A) about 60 to 75 mole percent of terephthalic acid; PA0 (B) about 15 to 25 mole percent of at least one dicarboxylic acid of the formula HOOC(CH.sub.2).sub.n COOH, wherein n ranges from about 1-11; PA0 (C) greater than from about 6 up to about 15 mole percent of at least one sulfomonomer containing an alkali metal sulfonate group attached to a dicarboxylic aromatic nucleus, and PA0 (D) Stoichiometric quantities, i.e., about 100 mole percent of at least one aliphatic or cycloaliphatic alkylene glycol copolymerizable therewith having about from 2 to 11 carbon atoms. The copolyester priming layer may be applied to the polyester film at any suitable stage during manufacture of the film, i.e., before or during the stretching operations. The resultant primed polyester film is found to provide excellent adhesion to many aqueous or organic solvent based coatings subsequently applied thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.