Uneven dispersion problems such as foaming and white spots of mixed rubber
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The main reason: the white carbon black on the market is more than ten yuan per kilogram of mixed rubber filled with precipitation method white carbon black, the pH itself is alkaline and contains free water (4-7%). Precipitated white carbon black is susceptible to moisture; it is also susceptible to moisture during the refining process and inadequate dispersion of white carbon black causes the white point problem to be solved;
Solution: Use structure control agent, coupling agent, dispersant to combine with the precipitated silica carbon hydroxyl group, and better mixing dispersibility; increase the kneading temperature of the kneader and increase the vacuum degree to discharge water; improve the raw rubber Plasticity, can effectively adsorb each other in the liquid phase.
