Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-03-24

1987-12-01

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

427128, 428216, 428480, 428694, 428900, G11B 570

Patent

active

047104210

ABSTRACT:
A magnetic recording medium having a heat shrinkage ratio of not higher than 1% and comprising a nonmagnetic support in the form of a tape which has a heat shrinkage ratio of not higher than 1.8%, a Young's modulus of 450 to 650 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of 450 to 550 kg/mm.sup.2 in the width direction, and a magnetic recording layer provided on the support which comprises a binder and a ferromagnetic powder dispersed therein and has a squareness ratio of not less than 0.89. All the heat shrinkage ratios are values determined after being allowed to stand at 110.degree. C. for 4 hours.

REFERENCES:
patent: 4187341 (1980-02-01), Suzuki et al.
patent: 4275107 (1981-06-01), Bartkus et al.
patent: 4316927 (1982-02-01), Kimura et al.
patent: 4481231 (1984-11-01), Hashimoto et al.
patent: 4546030 (1985-10-01), Minami et al.

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