Wedge rubber material for polywedge belt of automobile and preparation method thereof

Abstract

The invention discloses a wedge rubber material for a polywedge belt of an automobile. The wedge rubber material comprises the following substances by weight: 100 parts of chloroprene rubber, 4 to 6 parts of magnesium oxide, 1 to 2 parts of stearic acid, 1 to 5 parts of an antioxidant ODA, 5 to 8 parts of multifunctional masterbatch, 30 to 40 parts of carbon black, 10 to 15 parts of conductive carbon black, 0.1 to 3 parts of carbon nanotubes, 10 to 20 parts of nylon short fiber, 5 to 10 parts of aromatic hydrocarbon oil, 5 to 8 parts of zinc oxide and 1 to 3 parts of an antistatic agent. The invention also provides a preparation method for the wedge rubber material. The wedge rubber material has low electrostatic voltage value and good dynamic fatigue and service life; and the belt maintains low electrostatic voltage value in the whole life span.

Description

technical field [0001] The invention relates to the technical field of rubber transmission belts, in particular to a wedge rubber material used for automobile V-ribbed belts and a preparation method thereof. Background technique [0002] The V-ribbed belt for automobiles is a kind of rubber auto parts used to drive engine auxiliary devices (water pumps, generators, air-conditioning compressors, etc.). It has the advantages of high transmission power and space saving, but at the same time, in the process of friction transmission between the transmission belt and the wheel, due to the great difference in the conductivity of the two materials, the interface between the two is constantly in contact when the belt is running at high speed. Separation causes surface charge transfer, which will cause static electricity to accumulate on the surface of the V-ribbed belt. If the static electricity cannot be dissipated in time, it will cause some safety hazards when it accumulates to a ...

AI Technical Summary

Problems solved by technology

[0004] The most effective and simple way to make the rubber material have a certain antistatic property is to add substances that dissipate static electricity, such as acetylene carbon black with a high specific surface area. Generally speaking, the amount of conductive carbon black to make the rubber material have antistatic properties The number of parts is at least 30 parts (rubber mass parts are 100), but because the conductive carbon black is a fine particle carbon black with a relatively high structure and a relatively large specific surface area, it will cause poor dispersion during the mixing process. Poor processing performance. After being made into wedge rubber, due to the strong force between carbon blacks, excessive fatigue and heat generation will cause early damage during dynamic operation, and cracks will appear and the service life will be short.

[0005] The traditional V-ribbed belts of automobiles mostly have a top cloth. When the top cloth bypasses the pulleys during the operation of the belt, it is easy to generate static electricity and is not easy to dredge. Although the antistatic glue can be used to treat the cloth, the effect is not good. The rubber material replaces the top cloth. Due to the shrinkage of the cord during the vulcanization process, it is easy to cause wired marks or even cracks on the finished belt back, which affects the appearance and product quality, especially when neoprene with a low Mooney viscosity is used as the main material, so this The thickness of the layer rubber material and the molding process have a great influence on the quality and performance of the product

[0006] Chinese patent CN203570919 discloses an antistatic automotive V-ribbed belt, in which at least one layer of conductive fiber layer is provided at the wedge body, so as to reduce the friction coefficient of the surface of the elastomer and reduce the probability of static electricity generated by the friction between the belt body and the pulley, but the method The preparation process is complex and the conductive fiber layer is prone to dynamic flexion and separation from the wedge during use, which affects the service life of the product

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