Low-hardness and high-drawing-fatigue-resistance flame-retardant wire rope core conveyer belt core rubber and preparation method thereof

Abstract

The invention relates to low-hardness and high-drawing-fatigue-resistance flame-retardant wire rope core conveyer belt core rubber which comprises the following raw materials: 10-20 parts by weight of natural rubber, 10-20 parts by weight of cis-1,4-polybutadiene rubber, 60-80 parts by weight of chloroprene rubber CR3222, 10-30 parts by weight of reinforcing agent, 10-20 parts by weight of binding agent, 40-80 parts by weight of flame retardant, 1-5 parts by weight of anti-aging agent, 1-4 parts by weight of sulfur, 0-4 parts by weight of vulcanizing agent, 2-4 parts by weight of zinc oxide, 2-3 parts by weight of magnesium oxide, 1-2 parts by weight of accelerator and 2-3 parts by weight of activating agent. The invention also provides a preparation method of the core rubber. On the premise of not increasing the carbon black filler content in the core rubber, the invention increases the modulus of the flame-retardant wire rope core conveyer belt core rubber by adjusting the vulcanizing system in the core rubber, so that the flame-retardant wire rope core conveyer belt core rubber has favorable working property, and the drawing fatigue resistance is enhanced.

Description

technical field [0001] The invention relates to a low-hardness, high-fatigue-resistant and extractable flame-retardant conveyor belt steel cord core rubber with neoprene as the main rubber material and a preparation method thereof. The conveyor belt prepared by using the core rubber can be used with various types of large-capacity, The long-distance conveyor is used in conjunction with it, and is mainly used in coal mining and other industries. Background technique [0002] The steel cord conveyor belt is made of high-performance galvanized steel wire ropes arranged at a fixed longitudinal distance and equal tension as the skeleton material, and the upper and lower sides and both sides are covered with core rubber and covering rubber with different properties and thicknesses after molding and vulcanization. The steel cord conveyor belt has the advantages of high strength, low elongation, good grooving, reliable joints, etc., and its safety performance (including flame retard...

AI Technical Summary

Problems solved by technology

[0005] To reduce the relative deformation between the core rubber and the steel wire rope, it is necessary to increase the modulus of the core rubber. The traditional method is to increase the filling amount of carbon black, but increasing the filling amount of carbon black will lead to uneven dispersion of the filler during processing; Moreover, the high hardness of the mixed rubber with high filling content is very unfavorable for the cold forming of the conveyor belt; the high filling content will also cause the finished product of the conveyor belt to generate heat during use. On the one hand, it is not conducive to energy saving, on the other hand, the continuous Accumulated heat reduces belt life