Aromatic polyamide film and magnetic recording medium using the same
US6096419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Aug 1, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/8305
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides an aromatic polyamide film wherein a heat-shrinkage in the TD direction at 220.degree. C. is of 0.2 to 8% under a load of 80 kg/cm.sup.2, and wherein an average ten-point roughness Rz of the surface that is opposite to a surface for providing a magnetic layer is 10 to 200 nm; and a magnetic recording medium, wherein a magnetic layer is provided on a surface of the film. Since the heat-shrinkage at a high temperature and the properties of the surface of the film are within the confines of the present invention, there is obtained a magnetic recording medium having a high degree of flatness with small curls, and a high recording density by using the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.