Cellulose ester film manufacturing method

Details Cellulose ester film manufacturing method Cellulose ester film manufacturing method

1998-02-24

2000-03-14

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Microwave

264217, 264344, B29D 701

Patent

active

060369132

ABSTRACT:
Disclosed is a method of manufacturing a cellulose ester film, the method comprising the steps of dissolving a cellulose ester and a plasticizer in a solvent containing a cyclic diether solvent to obtain a cellulose ester solution, casting the solution on a support to form a cellulose ester film, separating the cellulose ester film from the support, and drying the separated film, wherein the water content of the solution is 0.06 to 15 weight %, and the residual solvent content in the film at the separation step is 50 to 450 weight %.

REFERENCES:
patent: 2167909 (1939-08-01), Rooney et al.
patent: 2232012 (1941-02-01), Rooney et al.
patent: 2319051 (1943-05-01), Fordyce et al.
patent: 3857759 (1974-12-01), Fiore et al.
patent: 5314647 (1994-05-01), Rieth
English Translation of French Patent 744,570 Dreyfus, Apr. 24, 1933.

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