Biaxially-oriented polyester film
AssigneeToray Industries, Inc.
InventorsIwao Okazaki, Shozi Nakajima, Yukari Nakamori
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Abstract
A biaxially-oriented polyester film includes at least two layers and at least one outermost layer is composed of a polyester having a rigid amorphous content of about 10 to 55%. The biaxially-oriented polyester film has a longitudinal Young's modulus of at least about 4.5 GPa. The biaxially-oriented polyester film is suitable for high-density magnetic recording media, such as digital video tapes and high-density data recording tapes.
Claims36
A biaxially-oriented polyester film comprising at least two layers, at least one layer being an outermost layer and comprising a polyester having a rigid amorphous content of about 10 to about 55%, said film having an inner layer, said biaxially-oriented polyester film having a longitudinal Young's modulus of at least about 4.5 GPa.
Dependencies are inferred from the claim text.