Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1998-08-26

2000-10-10

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428328, 428336, 4284235, 4284259, 4284244, 4284752, 428532, 428694BG, 428694BS, 428694SL, 428900, G11B 5738, G11B 5735

Patent

active

061299790

ABSTRACT:
A magnetic recording medium composed of an aromatic polyamide support, a magnetic recording layer arranged on one surface side of the support, and a back-coating layer arranged on the other surface side of the support is improved in its running durability, by forming the back-coating layer from solid particles and a binder in amounts of the range of 8/10 to 20/10, and further by placing a subbing layer of polyester resin or polyurethane resin having a Tg of 40.degree. C.-80.degree. C. and a polar group such as --SO.sub.3 M, --OSO.sub.3 M, --COOM and --OPO.sub.3 MM.sup.1 (each of M and M.sup.1 is hydrogen, an alkaline metal ion or an ammonium ion) between the support and the back-coating layer.

REFERENCES:
patent: 4795672 (1989-01-01), Takeda et al.
patent: 5645918 (1997-07-01), Ito et al.

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