English Abstract

Breaking Behavior of Elastomer in Rubber Mixers (2)
Possibility of Formation of Rheological Unit on a Two-Roll Mill and Rubber Powders Produced by Dynamic Vulcanization in Various Mixers

Michiharu TOH *2
*1:Nihon Spindle Manufacturing Co.,Ltd, Amagasaki-city, Hyogo, Japan
*2:Professor Emeritus, Kurume National College of Technology, Kasuyagun, Fukuoka, Japan
Nippon Gomu Kyokaishi,(2018),91(6),177-184 General Review in Japanese

In absence of cutting and folding on a two-roll mill, it is assumed that the radial mixing a powder in bank into band rubber on the roll surface was caused by rheological unit. It is thought that the rheological unit will be formed on the surface band rubber when the band rubber passes through from the bank to the nip of the roll.
Rubber powders was produced by comminution due to dynamic vulcanization of rubbers containing curing regents. Dynamic vulcanization was carried out in a two-dimensional internal mixer. The torque of a rotor axis, and temperature and pressure of the rubber increased when the vulcanization occurred. The same vulcanization was also carried out in a internal mixer, a sand mill and a two-roll mill.

Keywords: Mixing, Roll Mill, Mixer, Breaking, Failure, Rheological Unit, Rubber Powder, Dynamic Vulcanization