Method for producing optical compensating film, optical...

Details Method for producing optical compensating film, optical... Method for producing optical compensating film, optical...

2006-08-29

2006-08-29

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

C359S506000, C264S001340, C349S096000

Reexamination Certificate

active

07099082

ABSTRACT:
Provided is a method for producing an optical compensating film, which comprises stretching a cellulose acetate film, the cellulose acetate film having a water content of 2.0 to 20.0% by weight, wherein the cellulose acetate for the film has an acetyl value of from 57.0% to 62.5%.

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K. Mantsumoto et al., “Stretchability of Cellulose Acetate Fims by Swell-Wet Process”, Journal of the Society of Fiber Science and Technology, Japan, vol. 56, No. 1, 2000, pp. 6-11, XP001117803, p. 6, left-hand column, line 1, p. 11, right-hand column, line 14.

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