Rubber Product Archive

Calendering process of neoprene

Neoprene is temperature sensitive and has a low roll temperature control range of between 35 and 45 °C. No need for refining, direct feeding after roughing, in order to prevent scorch, full-chloroprene rubber calendering rubber hot conditions.

The hot-melt rubber is continuously fed by a special open mill to the calender. The speed of the conveyor belt should be slightly larger than the linear speed of the hot-roller drum. The amount of glue should be slightly larger than that of the calendering. The amount of glue for the anti-adhesive material should be less, and the amount of glue on the roller of the calender should be less, so as not to cause the thickness of the calender to fluctuate or bubbles appear. If it is a non-continuous supply of glue, increase the number of additions and reduce the amount of each addition; if it is necessary to use a feeding method with a small number of times and a large amount of addition each time, a thicker supply film should be used, and Support the rubber sheet to slow down the cooling rate of the rubber material as much as possible; when feeding, it is necessary to distribute the glue amount evenly along the width direction of the rolling.

With the improvement of the automation level of the calendering process and the calendering speed, the pin-type cold feed screw squeezing machine has been used for modern large-scale production for hot refining and feeding, which simplifies the process, saves the machine table, plant area and operators. It has greatly improved efficiency.

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