Polyester film for recording medium and magnetic recording tape

Details Polyester film for recording medium and magnetic recording tape Polyester film for recording medium and magnetic recording tape

2004-02-04

2009-10-27

Bernatz, Kevin M. (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magnetic recording media substrate

C428S847300, C428S847600, C428S147000

Reexamination Certificate

active

07608349

ABSTRACT:
A polyester film for recording medium, having one major surface thereof provided with a coating layer containing fine particles of 5 to 60 nm diameter and an organic compound, wherein the number of fine surface projections existing on the surface of the coating layer is in the range of 3 million to 100 million/mm2, and the number of surface defects of 120 nm or greater height attributed to foreign matter contained in the film is 30/100 cm2or less, and wherein the polyester contains a titanium compound substantially not having any particle diameter. Thus, there are provided a magnetic recording tape for digital data recording that can reduce dropouts and excels in durability, and further provided a polyester film that is suitable as a base film thereof.

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