Production method of polymer film

Details Production method of polymer film Production method of polymer film

2007-03-22

2010-06-01

Wyrozebski, Kat (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

C264S172190

Reexamination Certificate

active

07727438

ABSTRACT:
A primary dope is obtained by mixing a solvent and a polymer, and an additive is added to the primary dope, and thus a second dope for a main layer, a first dope for a contact layer and a third dope for an exposure layer are prepared. Only in the second dope is contained at least one of retardation controller, UV absorbing agent and deterioration inhibitor. The first-third dopes are cast from a casting die onto a casting belt to form a casting film of a three layer structure having the base, contact and exposure layers. Since the volatile compound is contained in the main layer, a precipitation of the volatile compounds on a surface of a produced film is prevented.

REFERENCES:
patent: 2005/0077648 (2005-04-01), Sugiura
patent: 2001-054936 (2001-02-01), None
patent: 2003-053752 (2003-02-01), None

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