Magnetic disk having a magnetic layer comprising a binder and fe

Details Magnetic disk having a magnetic layer comprising a binder and fe Magnetic disk having a magnetic layer comprising a binder and fe

1989-10-20

1991-09-24

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428694, 428900, 4284259, G11B 2300

Patent

active

050512870

ABSTRACT:
A magnetic disk comprising a nonmagnetic support having provided thereon a magnetic layer comprising a ferromagnetic metal powder and a binder resin, wherein the magnetic layer has a mechanical loss tangent, tan .delta., of from 8.times.10.sup.-3 to 6.times.10.sup.-2, measured at a frequency of 110 Hz and in a temperature range of from 20.degree. to 50.degree. C. with a temperature increase rate of 2 deg/min.

REFERENCES:
patent: 4520070 (1985-05-01), Yamamoto et al.
patent: 4659626 (1987-04-01), Fukushima et al.
patent: 4741977 (1988-05-01), Koga et al.
patent: 4863793 (1989-09-01), Ogawa et al.

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