Silica gel tube will bubble up there are two reasons:
1 silica raw material problem: transparent white carbon impurity, or mixed with other silica
2 rubber time problem: rubber mixing uneven, filling capacity is not reasonable, the discharge temperature and time is not properly controlled.
The specific solution:
1 for the problem of raw materials: the choice of raw materials to choose when the purity of good transparent white carbon black, kneading machine to clean up after in the refining of transparent glue.
2 for the coking process of coking problem: when you want to control the temperature of kneading, kneading time control, in the original kneading time best could be prolonged for another 5-10 minutes, in rows of rubber test.
