Common problems and solutions of EVA processed rubber shoe materials

Common problems and solutions of EVA processed rubber shoe materials The primary quality problems and factors of rubber shoe materials

Factors in the mixing process:
The mixing time is not enough and the debinding temperature is too low or too high. The acidic compounding agent and the basic compounding agent should be added together (such as adding stearic acid and anti-scorch agent ESEN together with zinc oxide and magnesium oxide). Insufficient mastication, The order of adding the compounding ingredients is not appropriate, and the filler is added too late in the mixing cycle. Add small particle size carbon black and resin or viscous oil together, and the time for metal oxides to disperse is not good; when the materials have begun to tear or fragment Finally, add liquid plasticizer or the batch size of the rubber is too large or too small.

Factors in the process operation of EVA processed products:
The established mixing program was not followed, agglomerates of oily and dry materials stuck to the upper jack and the sides of the feed hopper, the rotor speed was not correct The compound was unloaded from the tablet machine too quickly and the tablet was not used correctly Gluing equipment on the machine.

Factors on the device:
The temperature control of the internal mixer is invalid, the pressure of the top bolt is not good, the welding layer in the mixing chamber is excessively worn, the temperature control of the roller of the tablet press is invalid, and the elevated glue turning equipment on the tablet press is malfunctioning

Source factors:
Rubber expired storage and part of the gel, 3 yuan EPDM or butyl rubber is too cold