High density magnetic recording medium

Details High density magnetic recording medium High density magnetic recording medium

1991-12-27

1993-05-18

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428143, 428213, 428480, 428694BB, B32B 2700

Patent

active

052120066

ABSTRACT:
A novel high density magnetic recording medium is disclosed. Said medium comprises a polyester film formed of a plurality of layers laminated by coextrusion and oriented by stretching, which simultaneously satisfies the conditions of the following relations (1) to (4); a back coat layer which is provided on the rougher surface side of said polyester film layer and whose surface roughness simultaneously satisfies the conditions of the following relations (5) and (6); and a magnetic film layer provided on the less rough surface side of said polyester film.

REFERENCES:
patent: 4568599 (1986-02-01), Ono et al.
patent: 4798759 (1989-01-01), Dallman et al.
patent: 5047278 (1991-09-01), Ono et al.
patent: 5069962 (1991-12-01), Okazaki et al.

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