Title:
BIAXIALLY-STRETCHED RESIN FILM
Document Type and Number:
Japanese Patent JP2007130997
Kind Code:
A
Abstract:
To provide a biaxially-stretched resin film in which the generation of a rainbow pattern is inhibited in the inspection of a crossed Nichol method.
The biaxially-stretched resin film comprises a layer containing a polyethylene terephthalate-based resin (A) and a layer containing a syndiotactic polystyrene-based resin (B) alternately overlying into five or more layers, wherein the birefringence ΔP in each direction of 0°, 45°, 90° and 135° is 0.05 or less. Further, the difference between the maximum value and the minimum value in the birefringence ΔP in each direction of 0°, 45°, 90° and 135° is preferably 0.01 or less.
Inventors:
ITO KATSUYA
HAMAMOTO SHIRO
NOSE KATSUHIKO
HAMAMOTO SHIRO
NOSE KATSUHIKO
Application Number:
JP2006276088A
Publication Date:
May 31, 2007
Filing Date:
October 10, 2006
Export Citation:
Assignee:
TOYO BOSEKI
International Classes:
B32B27/30; B29C55/12; B32B27/36; B29K25/00; B29K67/00; B29L7/00; B29L9/00
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