Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1990-02-09
1991-09-24
Cashion, Jr., Merrell C.
Stock material or miscellaneous articles
Composite
Of inorganic material
428900, G11B 2300
Patent
active
050513192
ABSTRACT:
A magnetic recording tape comprising a non-magnetic substrate, a magnetic layer which comprises magnetic powder and a binder resin coated on one surface of the substrate and a back coating layer which comprises non-magnetic powder and a binder resin coated on the other surface of the substrate, wherein an amount of compounds having a molecular weight of 1000 to 5000, as converted to polystyrene molecular weight, extracted with tetrahydrofuran and converted to a polystyrene extraction amount, per 3 .mu.m thickness from the magnetic layer (W.sub.M) and per 1 .mu.m thickness of from the back coating layer (W.sub.B), are both less than 200 mg/m.sup.2, which tape has improved traveling stability and durability.
REFERENCES:
patent: 4210703 (1980-07-01), Scantlin et al.
patent: 4313989 (1982-02-01), Suzuki et al.
Kaneno Kimihiko
Kawarai Seigi
Kuse Sadamu
Cashion Jr. Merrell C.
Hitachi Maxell Ltd.
Resan Stevan A.
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