Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1995-02-16
1997-07-15
Kiliman, Leszek
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428328, 428329, 428694B, 428694BS, 428694BR, 428694BA, 428694BH, 428900, G11B 566, B32B 516
Patent
active
056481551
ABSTRACT:
The present invention provides a thin magnetic tape for allowing a long play without degrading electro-magnetic transfer characteristics and mechanical strength of the magnetic tape. The magnetic tape comprises a base film, an an under layer provided on the base film, and a magnetic layer containing magnetic particles coated on the under layer. The under layer contains magnetic plate-particles each having a configuration such that a ratio of a major axis to a minor axis observed in a plate-like surface is preferred to be approximately 1 and a ratio of the major axis to a thickness off the magnetic particles is to be 5.about.10 so that the under layer has Young's modulus of not less than 2.0.times.10.sup.10 N/m.sup.2 in a longitudinal direction of the magnetic tape and has virtually the same value in a traversing direction thereof. The magnetic plate-particles have an easy axis of magnetization in a longitudinal direction of the magnetic tape to improve the electro-magnetic transfer characteristics and mechanical strength thereof by forming magnetic flux coupling between the magnetic plate-particles in the under layer and the magnetic particles in the magnetic layer.
REFERENCES:
patent: 4442159 (1984-04-01), Dezawa
patent: 4911951 (1990-03-01), Ogawa
patent: 4965120 (1990-10-01), Ono
Matsubayashi Yoshiteru
Ohata Yuji
Oshita Jyunji
Tokui Kenji
Yoshikawa Masashi
Kiliman Leszek
Meller Michael N.
Victor Company of Japan Ltd.
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