Method and apparatus for producing dope

Details Method and apparatus for producing dope Method and apparatus for producing dope

2008-04-08

2008-04-08

Cain, Edward J. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S303000

Reexamination Certificate

active

07354964

ABSTRACT:
The mixture solvent of dichlorimethane type, the TAC and the plasticizer are supplied into a dissolution tank, and stirred therein with a stirrer to obtain a dispersing solution. The dispersing solution is fed into a storing tank and further stirred therein. Then the dispersing solution is fed by a pump to a heat exchanger for the heating, and thereafter the stirring is made with a static mixer. The temperatures of the dope is measured at many measuring points. On the basis of the temperature distribution, the heat transmission conditions of the heat exchanger are adjusted. Then the dope is fed to a heat exchanger for cooling, to cool to at most the normal boiling point of the dope. Then the mixing is made with a static mixer. Thus the obtained dope is uniform.

REFERENCES:
patent: 6974608 (2005-12-01), Shimizu et al.
Japan Institute of Invention and Inovation (JIII) Journal of Technical Disclosure; No. 2001-1745; Issued Mar. 15, 2001; pp. 1-84.

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