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the silica gel for food is an inorganic polymer colloid obtained by polycondensation of silicic acid. the main component is sio2·nh2o. its content is above 98%, it is non-toxic and tasteless, and its

1. off mold pressure: in principle, it should be greater than the total pressure of the plastic injection mold, based on no flash.2. pressure and speed have some of the same contact effects in the mol