Magnetic recording substance

Details Magnetic recording substance Magnetic recording substance

1977-01-18

1979-01-02

Ansher, Harold

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 252 6258, 427 48, 428408, 428900, H01F 1002, B32B 2720

Patent

active

041328272

ABSTRACT:
In a magnetic recording substance comprising a non-magnetic support and a magnetic recording layer provided on the support, carbon black having a surface area of at least 700 m.sup.2 /g and an oil absorption of at least 300 ml (DBP)/100 g is contained in the magnetic layer thereby lowering the surface electric resistance without deteriorating the characteristics of the magnetic recording layer.

REFERENCES:
patent: RE28866 (1976-06-01), Haefele et al.
patent: 2734033 (1956-02-01), Menard
patent: 2772761 (1956-12-01), Janson
patent: 3262812 (1966-07-01), Falk
patent: 3274111 (1966-09-01), Sada et al.
patent: 3320090 (1967-05-01), Graubart
patent: 3597273 (1971-08-01), Akashi et al.
patent: 3647539 (1972-03-01), Weber
patent: 3689317 (1972-09-01), Akashi et al.
patent: 3726714 (1973-04-01), Haines
patent: 4048375 (1977-09-01), Loewenberg et al.
patent: 4049871 (1977-09-01), Ogawa et al.

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