Rubber elasticity refers to the large reversible deformation of the rubber under the action of external force. In the production process of rubber products, the type of rubber material, the rubber content of the product, and the type and amount of compounding agents will all affect the elasticity of the rubber product. When nitrile rubber is used to produce rubber products, especially nitrile sealing products, the variety and amount of carbon black have a great influence on the elasticity of nitrile vulcanizates. Manufacturers of nitrile products should choose suitable carbon black varieties according to actual needs and make reasonable decisions. The amount of carbon black.
1. The effect of carbon black varieties on the elasticity of nitrile vulcanizates
When nitrile rubber products use high-strength carbon blacks such as super abrasion-resistant carbon black and channel carbon black to improve the physical and mechanical strength of the rubber compound, the particle size of the carbon black is smaller, and the elasticity of the nitrile vulcanizate after reinforcement is lower. Conversely, when the nitrile rubber 2YLYY62 product uses thermal carbon black with large particle size and low structure degree, the nitrile vulcanizate will obtain good elasticity. In actual production, the degree of influence of various carbon blacks on the rebound rate of nitrile vulcanizates is as follows:
When there is no carbon black>medium particle thermal black>fine particle thermal black>fast-pressed furnace black>fine particle furnace black>high wear-resistant furnace black>medium super wear-resistant furnace black.
2. The effect of the amount of carbon black on the elasticity of nitrile vulcanizates
When the same type of carbon black is used for nitrile rubber products, the greater the amount of carbon black, the rebound rate of nitrile vulcanized rubber will gradually decrease. When the amount of channel carbon black exceeds 75 parts, and the amount of fast-extruded carbon black exceeds 100 parts, the rebound rate of nitrile vulcanizate is particularly small; the amount of high wear-resistant carbon black is generally controlled 60 parts; use semi-reinforced Carbon black, spray carbon black or thermal black carbon black nitrile rubber vulcanizates have little change in resilience.
3. Carbon black selection skills in the production of nitrile sealing products
When nitrile rubber is used to produce sealing products, the compression deformation and elasticity of nitrile vulcanizate are important indicators to measure the quality of sealing products. In actual production, when the rubber material is required to have less compression deformation and greater elasticity, semi-reinforced carbon black or thermal black is mostly used; rubber product manufacturers can also use high wear-resistant carbon black to improve the Tensile strength and hardness of nitrile rubber sealing products.
With the continuous improvement of nitrile reclaimed rubber production technology and equipment, the quality of nitrile reclaimed rubber continues to improve, and the combined use of nitrile rubber and nitrile reclaimed rubber has become the main production method of nitrile rubber products. When using nitrile rubber/reclaimed rubber to produce rubber products, the manufacturer must select the right and use the right carbon black, and further adjust the elasticity, compression deformation and compression deformation of the nitrile vulcanized rubber through the combination of vulcanizing agents, accelerators, reinforcing agents, and softening oils.
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