Method for producing cellulose acylate film and optical...

Details Method for producing cellulose acylate film and optical... Method for producing cellulose acylate film and optical...

2011-04-19

2011-04-19

Wollschlager, Jeffrey (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Continuous or indefinite length

C264S001290, C264S001340, C264S002700, C264S172190, C264S173100, C264S175000, C264S210100, C264S210700, C264S211210, C264S288400, C264S290200

Reexamination Certificate

active

07927521

ABSTRACT:
According to the present invention, a cellulose acylate film having high thickness precision and no streaks can be formed by producing a film with a cellulose acylate resin by means of the polishing roller method, and a high-performance optical film, which is free from the retardation distribution, can be produced by subsequently stretching the cellulose acylate film thus obtained within a magnification range from 1 or more and 2.5 or less.

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