MAGNETIC TAPE
First Claim
1. A magnetic tape comprising:
- a non-magnetic support;
a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and
a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support,wherein a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm,a contact angle with respect to 1-bromonaphthalene measured regarding the surface of the magnetic layer is 45.0°
to 55.0°
, anda logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is equal to or smaller than 0.060.
1 Assignment
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Accused Products
Abstract
The magnetic tape includes a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, in which a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm, a contact angle with respect to 1-bromonaphthalene measured regarding the surface of the magnetic layer is 45.0° to 55.0°, and a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is equal to or smaller than 0.060.
99 Citations
11 Claims
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1. A magnetic tape comprising:
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a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, wherein a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm, a contact angle with respect to 1-bromonaphthalene measured regarding the surface of the magnetic layer is 45.0°
to 55.0°
, anda logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is equal to or smaller than 0.060. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification