B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/36 (2006.01) B29C 55/06 (2006.01) B29C 55/12 (2006.01) B29C 55/14 (2006.01) C08J 5/18 (2006.01) G11B 5/73 (2006.01)
Patent
CA 2273499
A biaxially oriented polyester film having at least one film layer mainly formed from polypropylene terephthalate and a heat shrinkage at 80 ~C in 30 minutes of 0.8 % or below. It is excellent in abrasion resistance and particularly useful as a magnetic recording medium.
La présente invention concerne un film de polyester à orientation biaxiale. Une couche au moins de ce film est formée essentiellement de polypropylène téréphtalate. Ce film présente un rétrécissement à la chaleur n'excédant pas 0,8 % après 30 mn à 80 ·C. Ce film, qui présente en outre une très bonne résistance à l'abrasion, convient particulièrement comme support d'enregistrement magnétique.
Kubota Akira
Nakajima Shozi
Nakamori Yukari
Okazaki Iwao
Shirakawa Yuri
Smart & Biggar
Toray Industries Inc.
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