Process for the admixture of additives into plastics with simult

Details Process for the admixture of additives into plastics with simult Process for the admixture of additives into plastics with simult

1975-04-03

1977-12-27

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 37, 264102, 264211, 264349, 425812, 366 75, 366 78, 366 80, B29B 104, B29B 110

Patent

active

040655326

ABSTRACT:
A process for admixing additives to plastics and simultaneously removing volatile constituents in a horizontal devolatilizing extruder. Taken in sequence in the direction of flow, the additives are first introduced into the devolatilizing extruder from above, and the plastic melt, solution or dispersion is then introduced from below, while the bulk of the volatile constituents are withdrawn from the devolatilizing extruder at an orifice located vertically above the point at which the plastic is fed in. The process permits the removal of volatile constituents with simultaneous admixture of additives during aftertreatment of plastics, in a single step and at very high throughputs.

REFERENCES:
patent: 3023456 (1962-03-01), Palfey
patent: 3040005 (1962-06-01), Bernhardt et al.
patent: 3376603 (1968-04-01), Colombo
patent: 3410938 (1968-11-01), Schippers
patent: 3563514 (1971-02-01), Shattuck
patent: 3742093 (1973-06-01), Skidmore

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