Patent ID: 8404371
Filing Date: 2013-03-26
Classification: B29C,B29K,C08J,G11B

Abstract:
1. A magnetic recording tape comprising a base film of the magnetic recording tape which is a biaxially oriented polyester film having a Young's modulus in a film machine direction (TMD) of 6.5 GPa or more and a Young's modulus in a film machine direction (TMD) of 6.5 GPa or more and a Young's modulus in width direction (YTD) of 8.2 to 9.8 GPa wherein YTD is larger than YMD by 0.5 to 2.5 GPa, the biaxially oriented polyester film has a temperature expansion coefficient in the film width direction of −5 to −1 ppm/° C., and a thickness of 3 to 6 μm, the magnetic recording tape is under a linear recording system, and a non-magnetic layer and a magnetic layer formed on one side of the film and a back coat layer formed on the other side.