Continuous production of cross-linked polyethylene

Details Continuous production of cross-linked polyethylene Continuous production of cross-linked polyethylene

B - Operations, Transporting

29

B

18/733

B29B 1/10 (1980.01)

Patent

CA 1093266

CONTINUOUS PRODUCTION OF CROSS-LINKED POLYETHYLENE Abstract of the Disclosure Cross-linked polyethylene is continuously produced by injecting dicumyl peroxide (Dicup) into the polyethylene in the mixing barrel of the extruder. The Dicup injection nozzle extends into the flight of the screw of the extruder and the flight is interrupted, or notched, at this position. This enables the Dicup to be injected at a position about half way between the extruder barrel wall and the core of the screw and also avoids pulsed back- pressure on the feed pump for the Dicup. A closely controlled and constant ratio of cross-linking agent to raw polyethylene is obtained. - i -

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