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MAGNETIC TAPE

  • US 20180061447A1
  • Filed: 08/30/2017
  • Published: 03/01/2018
  • Est. Priority Date: 08/31/2016
  • Status: Active Grant
First Claim
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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,wherein a center line average surface roughness Ra measured regarding the surface of the magnetic layer is 1.0 nm to 1.8 nm,the ferromagnetic powder is ferromagnetic hexagonal ferrite powder,the magnetic layer includes non-magnetic powder,a tilt cos θ

    of the ferromagnetic hexagonal ferrite powder with respect to a surface of the magnetic layer acquired by cross section observation performed by using a scanning transmission electron microscope is 0.85 to 1.00, andlogarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is equal to or smaller than 0.060.

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