Laminated film and magnetic recording medium made therewith

Details Laminated film and magnetic recording medium made therewith Laminated film and magnetic recording medium made therewith

1983-03-09

1985-10-29

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428145, 428147, 428149, 428152, 428201, 428206, 428447, 428480, 428483, 428484, 428694, 428695, 428900, G11B 572, B32B 300

Patent

active

045500495

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.

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patent: 4390601 (1983-06-01), Ono et al.
patent: 4394420 (1983-07-01), Tamai et al.
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