Process for producing cellulose acylate film

Details Process for producing cellulose acylate film Process for producing cellulose acylate film

2002-07-31

2008-12-30

Daniels, Matthew J. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

C264S207000, C264S212000, C524S037000

Reexamination Certificate

active

07470385

ABSTRACT:
A cellulose acylate film is produced by using a cellulose acylate solution and forming a film consisting of two or more layers by the co-casting method. The cellulose acylate to be used is selected so that the association molecular weight of cellulose acylate due to the static light scattering in the solution forming the outer layer becomes smaller than the association molecular weight of cellulose acylate due to the static light scattering in the solution forming the inner layer.

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Reference: Polymer Properties, Sigma Aldrich, p. 49.
International Search Report Mailed Nov. 19, 2002 for International Application No. PCT/JP02/07799.
Kokaigiho [Technical report (Japanese)] No. 2001-1745, p. 15, right col., line 1 to p. 16, left col., line 8, Japan Institute of Invention and Innovation, with verified English translation.
Kokaigiho [Technical report (Japanese)] No. 2001-1745, Mar. 15, 2001, p. 15, right col., line 1 to p. 16, left col., line 8, Japan Institute and Innovation, with verified English translation.

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