Title:
SYNDIOTACTIC POLYSTYRENE BIAXIALLY DRAWN FILM FOR OVERHEAD PROJECTOR
Document Type and Number:
Japanese Patent JPH0691748
Kind Code:
A
Abstract:
PURPOSE: To provide a syndiotactic polystyrene biaxially drawn film for overhead projector which is superior in transparency, and also in phototaxis, wear resistance and heat-resistance.
CONSTITUTION: The title syndiotactic polystyrene biaxially drawn film for overhead projector has a light transmittance of 80% or higher, the three- dimensional surface roughness SΔa of which on at least one surface is not less than 0.004 and not more than 0.04, and the coefficient of heat shrinkage of which at 150°C is not more than 1%.
Inventors:
ODA NAONOBU
IMAI MASAYUKI
YOSHINAGA TOMONORI
OKUDAIRA TADASHI
IMAI MASAYUKI
YOSHINAGA TOMONORI
OKUDAIRA TADASHI
Application Number:
JP24346192A
Publication Date:
April 05, 1994
Filing Date:
September 11, 1992
Export Citation:
Assignee:
TOYO BOSEKI
International Classes:
B29C55/12; C08J5/18; C08L25/00; C08L25/04; B29K25/00; B29K105/32; B29L7/00; (IPC1-7): B29C55/12; C08J5/18; C08L25/04