| 摘要 |
Polymers containing volatile solvents or the like are fed into a cylindrical cage and carried through the cage by screw members past injectors which add a desolventizing agent to the polymer. This agent is mixed into the polymer and the polymer is then forced through a circular ring, which is axially adjustable, forming an annular restriction which exits into a vented section of the cage where pressure on the polymer is substantially reduced and the volatile solvent escapes through slit-like vent openings to be collected and returned to solvent recovery apparatus. This arrangement is repeated through a second set of injectors, mixing screws, and vent section. The polymer may have compounding agents, such as an oil, injected and mixed into it, either in the same apparatus, or in a second machine, and either before or after the desolventizing steps.
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