The role of the reinforcement system in the formulation of rubber products is to improve the tensile strength, tear resistance, wear resistance, modulus, and swelling resistance of vulcanizates. When using black natural reclaimed rubber to reduce the raw material cost of rubber V-belts, a reasonable design of reinforcement system can significantly improve the physical and mechanical properties of rubber V-belts. In actual production, there are certain differences in the types and amounts of reinforcing agents for different rubber layer formulations for rubber V-belts containing reclaimed latex rubber.
1. Reinforcement system with cloth covering glue
When black latex reclaimed rubber is used for the rubber V-belt with natural rubber and styrene-butadiene rubber as the main raw material, the V-belt cloth rubber usually uses high wear-resistant carbon black and semi-reinforced carbon black, such as carbon black N330 (reinforcing carbon black) ), N660 (semi-reinforcing carbon black), N770 (semi-reinforcing carbon black), the dosage is generally controlled between 30-35 parts to improve the tensile strength, tear resistance, abrasion resistance and While being elastic, it further improves the tensile stress, flexural resistance and processing performance of the vulcanizate.
2. Cord rubber reinforcement system
The reinforcement system of ordinary rubber V-belt cord rubber is generally semi-reinforced carbon black. Semi-reinforcing carbon black belongs to soft carbon black. In the production of rubber V-belts, it can improve the elongation, elasticity and aging resistance of products, reduce the heat generated in the working process of V-belts, and extend the performance and service life of V-belts. When using black latex 2LLYY114 reclaimed rubber in rubber V-belts, it is recommended that rubber product manufacturers mainly use semi-reinforced carbon black, and use high-wear carbon black in small amounts to further improve the mechanical strength of rubber V-belts.
3. Compression layer reinforcement system
The rubber V-belt compression layer glue plays an important role in supporting the work of the entire V-belt, and has certain requirements for the hardness of the rubber material used. When black natural reclaimed rubber is used in the rubber V-belt compression layer rubber, the use of high abrasion-resistant carbon black and super abrasion-resistant carbon black can significantly increase the hardness of the rubber, and improve the tensile strength, tear strength, and abrasion resistance of the compressed layer. And physical properties such as anti-aging performance.
In order to coordinate the relationship between the hardness and elasticity of the rubber V-belt compression layer containing latex reclaimed rubber, generally high wear-resistant carbon black is used together with other types of carbon black, and the amount is controlled between 50-60 parts; if you want To further increase the wear resistance and lateral rigidity of the rubber V-belt compression layer compound, 10-20 short fibers can be added.
When black natural rubber is used to prepare each layer of rubber V-belt, the application of the reinforcement system can significantly improve the product hardness, tensile strength, abrasion resistance and other indicators, but it will affect the elasticity and tearing of the V-belt to a certain extent. Length rate etc. In this regard, rubber V-belt manufacturers can coordinate the relationship between the various indicators of the V-belt by adjusting the softening system of the natural rubber/latex reclaimed rubber V-belt formula. The editor will have the opportunity to continue discussing with you.
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