Biaxially oriented laminated polyester film having different size particles in a layer thereof
US5516574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A biaxially oriented laminated polyester film comprising: PA1 (A) a first thin polyester layer formed from an aromatic polyester containing two kinds of inert fine particles having different size and PA1 (B) a second polyester layer formed from an aromatic polyester, on at least one surface of which the above first thin polyester layer is present. This biaxially oriented laminated polyester film is is excellent in lubricity, abrasion resistance and scratch resistance and is particularly useful as a base film for a magnetic recording medium. The two kinds of inert fine particles include inorganic fine particles having an average particle diameter, d.sub.a of 0.02 to 0.3 .mu.m and organic fine particles having an average particle diameter, d.sub.b of 0.2 to 1.5 .mu.m, and d.sub.b >d.sub.a.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.