Process for alkali saponification of cellulose ester film...

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

Reexamination Certificate

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C536S068000, C536S069000, C536S076000, C536S124000

Reexamination Certificate

active

10368391

ABSTRACT:
A process for alkali saponification of polymer film is disclosed. The process comprises the steps of applying solution of an alkali onto a polymer film having a temperature of not lower than room temperature, and washing away the alkaline solution from the film.

REFERENCES:
patent: 4945026 (1990-07-01), Tomiyama et al.
patent: 6649231 (2003-11-01), Ito
patent: 81034323 (1981-08-01), None
patent: 06279756 (1994-10-01), None

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