Polyethylene naphthalate multilayered film for high density magnetic recording medium
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United States of America Patent
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Apr 23, 1996
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Jul 1, 1992
filing date -
Jul 12, 1991
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Abstract
Disclosed herein is a polyethylene naphthalate multilayered film for a high density magnetic recording medium comprising: a polyethylene naphthalate layer (A), and a polyethylene naphthalate layer (B) laminated on at least one surface of said polyethylene naphthalate layer (A) and having a thickness of not more than 2 .mu.m and specific surface characteristics, the multilayered film having Young's modulus of not less than 700 kg/mm.sup.2 in machine and transverse directions.
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