Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1982-02-02
1983-11-08
Pianalto, Bernard D.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428328, 428329, 428330, 428331, 428336, 428694, 428900, B32B 516
Patent
active
044142706
ABSTRACT:
A magnetic recording medium comprising a magnetic layer on one surface of a non-magnetic base and a back coating on the other surface thereof which is not thicker than 2.mu. and which contains inorganic particles and a binder is disclosed. The inorganic particles have an average size between 0.02 and 5.mu. and a Mohs hardness of 2.5 to 9.0, and the surface of the back coating has a center line average roughness (Ra) of 0.024 or less and the surface of the magnetic layer has a center line average roughness (Ra) of 0.02.
REFERENCES:
patent: 3293066 (1966-12-01), Haines
patent: 3916039 (1975-10-01), Akashi et al.
patent: 4135032 (1979-01-01), Akashi et al.
Akashi Goro
Fujiyama Masaaki
Kitamoto Tatsuji
Miyoshi Takahito
Okutu Toshimitu
Fuji Photo Film Co. , Ltd.
Pianalto Bernard D.
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