Polarizing plate protective cellulose triacetate film
AssigneeKonica Corporation
InventorsIsamu Michihata, Masahito Takada, Kunio Shimizu, Koichi Nagayasu, Noriki Tachibana
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Abstract
A cellulose triacetate film characterized in being comprised of cellulose triacetate which is prepared by employing cotton liter as the raw material, having a value of weight average molecular weight Mw/number average molecular weight Mn of 3.5 to 4.5, or being comprised of cellulose triacetate which is prepared by employing wood pulp as the raw material, having a value of weight average molecular weight Mw/number average molecular weight Mn of 4.0 to 5.0.
Claims18
A protective film for a polarizing plate comprising cellulose ester having a value of weight average molecular weight Mw/number average molecular weight Mn of 3.0 to 5.0.
A polarizing plate comprising a first protective film, a polarizer and a second protective film wherein at least one of the first protective film and the second protective film comprises cellulose ester having a value of weight average molecular weight Mw/number average molecular weight Mn of 3.0 to 5.0.
Dependencies are inferred from the claim text.