Polarizing plate protective film and manufacturing method for the same
AssigneeKonica Minolta Opto, Inc.
InventorsYasuki Nagai, Kazuto Kiyohara, Masahiko Yamasaki, Akihiko Takeda
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Abstract
A method for manufacturing a polarizing plate protective film including the steps of: 1) mixing a cellulose ester resin and an organic additive to obtain a mixing composition, 2) placing the mixing composition in a mold to obtain an integral molding, and 3) heating to melt the integral molding so as to form the polarizing plate protective film, wherein the integral molding has a size of 1 mm×1 mm×1 mm to 20 mm×20 mm×20 mm, and the cellulose ester resin is contained in the integral molding in a state of particles.
Claims9
A method for manufacturing a polarizing plate protective film comprising the steps of:
- 1) mixing a cellulose ester resin and an organic additive to obtain a mixing composition in a state of particles comprising the cellulose ester resin and the organic additive both having adjusted particle diameter,
- 2) placing the mixing composition in a mold and compressing to obtain an integral molding, the integral molding having a size of 1 mm×1 mm×1 mm to 20 mm×20 mm×20 mm, and the cellulose ester resin is contained in the integral molding in a state of particles wherein a weight average particle diameter (cDw50) of the cellulose ester film resin is in the range of 1 to 200 μm, and
- 3) melting the cellulose ester resin particles in the integral molding by heating the integral molding thereby to form the polarizing plate protective film.
Dependencies are inferred from the claim text.