Biaxially oriented polyester film
US5061571A · kind A · utility
7Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Dec 7, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A biaxially oriented polyester film containing 0.01 to 4 wt %, based on the polyester film, of inorganic particles, the volumetric shape parameter being 0.02 to 0.2, the weight-average particle size being 0.05 to 3 .mu.m, and the ratio (Dw/Dn) of the weight-average particle size (Dw) and the number-average particle size (Dn) being not more than 1.1 is disclosed. The film of the present invention has a uniform surface and shows excellent running property and wear resistance so that it is useful as a base film for a magnetic tape, for example. Thus, the film of the present invention has a high industrial value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.