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July 12, 2017

I. Crack and Thread

(1) raw materials are not sufficiently dry. The pre drying temperature should be increased and the drying time should be prolonged.

(2) impurities in the raw material are mixed with foreign matter. Should be completely removed.


(3) the melt temperatur...

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The role of the three functional zones of the PVC extruder

March 18, 2019