Laminated film and magnetic recording medium made therewith
US4550049A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1983 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Mar 9, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31801
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminated film comprising (A) a layer composed of a thermoplastic resin and (B) a layer composed of a thermoplastic resin containing fine particles therein, wherein a discontinuous skin having a height of 50 to 1,000 .ANG. is formed on the outer surface of the layer (A) and the outer surface of the layer (B) has a surface Ra value of 0.005 to 0.040.mu.. The laminated film is very valuable as a base film of a magnetic recording tape having a ferromagnetic metal thin film formed on the surface of the layer (A), especially a video tape, because it has good running properties and is excellent in electromagnetic transformation performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.