FILM OF AROMATIC POLYAMIDE AND/OR AROMATIC POLYIMIDE AND MAGNETIC RECORDING MEDIUM USING THE SAME

Title:

FILM OF AROMATIC POLYAMIDE AND/OR AROMATIC POLYIMIDE AND MAGNETIC RECORDING MEDIUM USING THE SAME

Document Type and Number:

WIPO Patent Application WO/1997/044182

Kind Code:

A1

Abstract:

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 1.0.

Inventors:

IEKI TOSHIYA (JP)
TSUKUDA AKIMITSU (JP)
TSUZUKI TOSHIHIRO (JP)

Application Number:

PCT/JP1997/001715

Publication Date:

November 27, 1997

Filing Date:

May 22, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TORAY INDUSTRIES (JP)
IEKI TOSHIYA (JP)
TSUKUDA AKIMITSU (JP)
TSUZUKI TOSHIHIRO (JP)

International Classes:

B29D7/01; C08J5/18; C09D5/23; G11B5/73; (IPC1-7): B29C55/12; C08J5/18; G11B5/704

Foreign References:

JPH06136156A	1994-05-17
JPH07256750A	1995-10-09
JPH08134233A	1996-05-28
JPH0971670A	1997-03-18

Other References: