English Abstract

Mill Behavior of Rubber on Two Roll Mill with Temperature

Hiroyuki ONTSUKA *1
Michiharu TOH *2
*1:Chemicals Evaluation and Research Institute, Nagoya, Japan, Nagoya-shi, Aichi, Japan
*2:R & D Department, Kurume Research Park Co., Ltd., Kurume-shi, Fukuoka, Japan
Nippon Gomu Kyokaishi,(2015),88(4),130-135 General Review in Japanese

The mixing of unvulcanized compounds and vulcanizing agents is performed on two roll mills at present. It was known that the mixing between the rubber and ingredients is conducted only at the nip on the two roll mill. So the size and temperature of bank at the nip, and the clearance of nip are very important.
It was found that when the roll temperature was varied, four regions of mill behavior were observed. In region 1 the highly elastic rubber will scarcely move into the mil nip at room temperature. In region 2 a good elastic rubber band is obtained on one of rolls. In region 3 the elastomer crumbles and bagging or crumbs occur. In region 4 a melt fluid coats on one of rolls at high roll temperature.
In this paper, mill behavior of rubber on two roll mills with the variation of temperature was expressed.

Keywords: Two Roll Mill, Roll Temperature, Rubber Temperature, Bank Temperature, Heat Transfer