Moisture-resistant, coated thermoplastic film having enhanced adhesion to inks and metallic layers
US4880695A · kind A · utility
9Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1987 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Nov 3, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A two-step, sequential coating method is disclosed which permits the use of aqueous precursor solutions to coat water-insoluble compounds onto thermoplastic film. In a preferred embodiment, an aqueous oleic acid/ammonium oleate solution is coated onto amorphous polyester sheet which is subsequently monoaxially oriented by stretching in the machine direction, and coated with an aqueous solution of calcium hydroxide, thereby forming a layer of calcium oleate in situ. The coated film is subsequently biaxially oriented by stretching in the transverse direction, and heat-set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.