Magnetic recording disc comprising magnetic powder and a binder

Details Magnetic recording disc comprising magnetic powder and a binder Magnetic recording disc comprising magnetic powder and a binder

1993-06-10

1994-12-06

Resan, Stevan A.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 64, 428286, 428287, 428694R, 428900, 206444, 360133, G11B 500

Patent

active

053709179

ABSTRACT:
A magnetic recording disc is disclosed which comprises a disc container with a liner comprising nonwoven fabric in which a flexible magnetic disc comprising a flexible non-magnetic support having on at least one side thereof a magnetic layer mainly comprising a ferromagnetic powder and a binder resin is rotably set, wherein said liner comprises (1) a nonwoven fabric layer mainly comprising rayon fiber on at least the side in contact with the magnetic layer, and (2) a nonwoven fabric layer mainly comprising polypropylene fiber, and said liner comprises from 70 to 80% by weight based on the liner of rayon fiber and from 20 to 30% by weight based on the liner of polypropylene fiber.

REFERENCES:
patent: 4610352 (1986-09-01), Howey et al.
patent: 4695912 (1987-09-01), Moriwaki
patent: 4699268 (1987-10-01), Oishi
patent: 4709816 (1987-12-01), Matsumoto et al.
patent: 5179487 (1993-01-01), Niitsuma et al.

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