Composite polyester films suitable in particular as supports for magnetic recording materials, and magnetic recording materials thus produced
US5476707A · kind A · utility
5Cited by
12References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | May 20, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to composite films consisting of a semicrystalline polyester substrate film, free from filler and with a roughness Ra lower than or equal to 0.01 .mu.m, carrying on at least one of its faces a coating based on a modified polymer obtained by polymerization of one or more acrylic monomers in the presence of a water-dispersible sulphonated copolyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.