Method and apparatus for producing dope
US7354964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2004 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Dec 22, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2301/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.