C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/18 (2006.01) B29D 7/01 (2006.01) G11B 5/73 (2006.01)
Patent
CA 2227576
A film having a high flatness which is not curled even at a high temperature during the manufacture and use thereof, i.e., which does not encounter the deterioration of the flatness thereof even under the mentioned conditions. This film comprises aromatic polyamide and/or aromatic polyimide, in which maximum and minimum values Pmax, Pmin of degree of orientation and an average degree of orientation Pavr determined on the basis of a Raman spectrum in the cross-sectional direction of the film shall satisfy the expression, (Pmax- Pmin)/Pavr<=1Ø
Cette invention se rapporte à un film ayant une planéité élevée, qui ne boucle pas même à haute température pendant sa fabrication et son utilisation, et qui ne subit pas de détoriation de sa planéité même dans les conditions de haute températurature mentionnées ci-dessus. Ce film comprend un polyamide aromatique et/ou un polyimide aromatique, dans lequel les valeurs maximum et minimum Pmax, Pmin du degré d'orientation et un degré moyen d'orientation Pavr déterminé sur la base d'un spectre de Raman dans la direction de la section transversale du film doivent satisfaire la relation: (Pmax-Pmin)/Pavr<=1,0.
Ieki Toshiya
Tsukuda Akimitsu
Tsuzuki Toshihiro
Smart & Biggar
Toray Industries Inc.
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