Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1997-08-26
2000-06-13
Resan, Stevan A.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428323, 428329, 428336, 4284259, 428694BR, 428694BS, 428694BM, 428694BL, 428900, G11B 5702
Patent
active
060747242
ABSTRACT:
A magnetic recording medium is disclosed, which comprises a support having thereon a magnetic layer comprising a binder and a ferromagnetic powder dispersed therein, wherein said binder comprises a polyurethane resin having at least one cyclic hydrocarbon group and at least one ether linkage, and said ferromagnetic powder is a ferromagnetic metallic powder which comprises Fe and has a mean major-axis length of from 0.05 to 0.19 .mu.m and a crystallite size of from 100 to 230 .ANG.; and further a magnetic recording medium is disclosed, comprising a support having thereon in succession an undercoat layer comprising a binder U and an inorganic powder dispersed therein and a magnetic layer comprising a binder M and a ferromagnetic powder dispersed therein, wherein at least either of the binder U or M comprises a polyurethane resin having at least one cyclic hydrocarbon group and at least one ether linkage and said ferromagnetic powder is a ferromagnetic metallic powder which comprises Fe and has a mean major-axis length of from 0.05 to 0.19 .mu.m and a crystallite size of from 100 to 230 .ANG..
REFERENCES:
patent: 5496622 (1996-03-01), Isobe et al.
patent: 5702821 (1997-12-01), Murayama et al.
patent: 5718964 (1998-02-01), Naoe et al.
patent: 5747157 (1998-05-01), Hashimoto et al.
patent: 5876833 (1999-03-01), Suzuki et al.
Ejiri Kiyomi
Inaba Hiroo
Murayama Yuichiro
Naoe Koji
Suzuki Masaki
Fuji Photo Film Co. , Ltd.
Resan Stevan A.
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