Title:
BIAXIALLY ORIENTED LAMINATED POLYESTER AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JP3235273
Kind Code:
B2
Abstract:
PURPOSE: To provide a film excellent in running properties and electromagnetic conversion characteristics.
CONSTITUTION: A film consists of at least three layers and the A- and B-layers constituting the outermost layers of the film are composed of a substantially identical polyester compsn. and the thickness tA(μm) of the A-layer, the thickness tB(μm) of the B-layer, the surface roughness RaA(μm) of the A-layer and the surface roughness RaB(μm) of the B-layer simultaneously satisfy the formulae of 1.5≤tA/tB≤50... (1), 0.3≤tA≤10... (2), 1.1≤RaA/RaB≤10... (3), 0.010≤RaA≤0.050... (4) and 0.005≤RaB≤0.020... (5).
Inventors:
Yoshinori Sato
Kawaguchi Affinity
Norio Okumura
Shigehiro Masuda
Kawaguchi Affinity
Norio Okumura
Shigehiro Masuda
Application Number:
JP13488093A
Publication Date:
December 04, 2001
Filing Date:
June 04, 1993
Export Citation:
Assignee:
Mitsubishi Polyester Film Co., Ltd.
International Classes:
B29C55/12; B29C47/06; B32B27/36; B29K67/00; B29L9/00; (IPC1-7): B32B27/36; B29C47/06
Domestic Patent References:
| JP5242449A | ||||
| JP6320694A |
Attorney, Agent or Firm:
Koji Hasegawa
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