When using natural rubber, styrene-butadiene rubber or natural rubber/styrene-butadiene rubber to produce rubber V-belts, rubber products manufacturers can use black natural latex reclaimed rubber to reduce raw material costs. Reasonable design of the rubber layer formula of the rubber V-belt containing black natural reclaimed rubber can further improve the performance and service life of the V-belt. In actual production, the design of the vulcanization system directly affects the rubber V-belt operation process, especially the vulcanization process and the comprehensive index of the V-belt. The types and amounts of compounding agents in different rubber layer vulcanization systems are different.
1. Cloth rubber vulcanization system
Rubber V-belt cloth-covered rubber requires that the rubber material has good wear resistance, heat resistance, aging resistance, viscosity, etc., black natural reclaimed rubber is used alone or in combination with natural rubber and styrene-butadiene rubber to prepare rubber V-belt cloth-covered rubber. Sulfur 2LLYY1023 vulcanization, with accelerator M, accelerator DM, appropriately extend the rubber vulcanization flat curve to prevent scorching and oversulfur; add a small amount of zinc oxide to activate the vulcanization system to shorten the vulcanization time, improve the vulcanization efficiency and the mechanical strength of the vulcanizate the goal of.
2. Cord rubber vulcanization system
Rubber V-belt cord rubber needs to withstand the tensile stress and load of the V-belt during operation and bending. When black latex reclaimed rubber and natural rubber are used together to produce V-belt cord fabric rubber, the vulcanization system is basically the same as that of V-belt fabric rubber. Sulfur can be used for vulcanization. The amount of sulfur should be controlled between 2-3 parts. Use accelerator M or accelerator together. DM; or use the accelerator CZ and the accelerator NOBS together. When natural rubber/natural reclaimed rubber/styrene butadiene rubber is used together to prepare V-belt cord fabric rubber, the amount of accelerator can be increased appropriately.
When using latex reclaimed rubber to reduce the raw material cost of rubber V-belt cord rubber, the sulfur vulcanization system uses about 10 parts of zinc oxide and a proper amount of stearic acid to further improve the thermal conductivity of cord rubber.
3. Compression layer vulcanization system
The rubber V-belt compression layer glue needs to withstand the compressive stress generated during the operation of the V-belt, and has high requirements on the bending fatigue resistance of the rubber. Sulfur vulcanization is often used. The vulcanization system is basically the same as the cord rubber. Increase and improve the thermal conductivity of the rubber compound.
When black latex reclaimed rubber is used in each layer of rubber V-belt to reduce the cost of raw materials, rubber product manufacturers generally choose sulfur vulcanization system to improve the mechanical strength of rubber V-belt; reasonably adjust the type and amount of compounding agent of rubber V-belt vulcanization system through adjustment The amount of vulcanizing agent and accelerator increases the crosslinking density of vulcanized rubber, coordinates the vulcanization process and vulcanization effect, and improves the performance and service life of rubber V-belts while reducing the cost of raw materials.
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