1：The recipe is not planned properly:
Full squirting: common in sulfur, accelerators, active agents, anti-aging agents, relocation and squirting: common in processing aids, relocation anti-aging agents. Antistatic agent generated spray: common in sulfur vulcanization system accelerator and reverberation with reaction product: common in organic peroxide vulcanization system low molecular weight excess stress ejection: common in inorganic fillers: such as calcium carbonate.
2.Technical operation is not appropriate:
Uneven mixing results in poor dispersion, partially surpassing fullness
The temperature of the rubber compound is too high, so that the compounding agent is partially excessive.
Inaccurate weighing (multiple, less, missing, wrong)
The vulcanization temperature is too high, and the polymer degradation constitutes a frosting
If the vulcanization temperature is too low, the vulcanization of the sulphur-inhibiting vulcanization is not complete, and the mold release agent or the washing water which constitutes the sulphur spray is not properly operated, which constitutes a whitish appearance of the rubber surface.