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

1986-02-04

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

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

Patent

active

045685991

ABSTRACT:
A laminated film for a super-high density magnetic recording medium, which comprises (A) a layer composed of a thermoplastic resin and (B) a layer of a thermoplastic resin containing fine particles therein. In this laminated film, the outer surface of the layer (A) has a surface roughness of less than 0.005.mu. as expressed as the Ra value, and the outer surface of the layer (B) has a surface roughness of 0.005 to 0.040.mu. as expressed as the Ra value. The outer surface of the layer (B) has either (i) a plurality of depressions and a plurality of protrusions, which are formed thereon in a configuration such that at least one protrusion exists within each depression or at least one protrusion exists in the area where two or more depressions are contiguous to each other, or (ii) protrusions on a flat plane and a covering layer (C) composed of a lubricant, which is formed on the surface of the layer (B). This covering layer (C) may be formed on the surface having the above-mentioned depressions and protrusions. The covering layer (C) is a continuous film layer or a discontinuous film layer formed of worm-like nodules. When a ferromagnetic metal thin film is formed on the surface of the layer (A) by vacuum evaporation and a protective film layer is formed on this thin film, there is obtained a vacuum-deposited video tape excellent in running properties and electromagnetic transformation performance. In this vacuum-deposited video tape, the transfer of the surface configuration due to the coarseness of the running surface can be prevented.

REFERENCES:
patent: 3656996 (1972-04-01), Van Paesschen et al.
patent: 3821156 (1974-06-01), Farrar
patent: 3993846 (1976-11-01), Higuchi et al.
patent: 4138386 (1979-02-01), Motegi et al.
patent: 4171406 (1979-10-01), Yamaguchi et al.
patent: 4233352 (1980-11-01), Ono et al.
patent: 4348446 (1982-09-01), Mitsuishi et al.
patent: 4388360 (1983-06-01), Miyoshi et al.
patent: 4390601 (1983-06-01), Ono et al.
patent: 4394420 (1983-07-01), Tamai et al.
patent: 4461797 (1984-07-01), Adachi et al.
patent: 4489117 (1984-12-01), Ono et al.

Affiliated with

Also associated with

Rating

Laminated film and magnetic recording medium made therewith does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Laminated film and magnetic recording medium made therewith, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laminated film and magnetic recording medium made therewith will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2340352