Calcium carbonate CAS 471-34-1 is one of the main fillers and reinforcements used in the rubber industry. In order to meet the diverse needs of the rubber industry, light calcium and heavy calcium are widely used in the rubber industry.
Heavy calcium carbonate is mainly used as a filler in the rubber industry, and can also be used as a colorant, release agent and release agent. The mixing and processing performance of heavy calcium carbonate and rubber is good, can increase the stiffness of the rubber, does not delay vulcanization, and is low in price. It is suitable for heels, soles, floors, hoses, and molded, extruded and foamed rubber products, etc. .
Light calcium carbonate has semi-reinforcing properties and is mainly used as a white reinforcing filler for rubber. Light calcium carbonate is easy to disperse in the rubber compound, which can improve the tensile strength, tear strength and abrasion resistance of the rubber compound. The physical properties of the rubber compound are slightly better than that of the heavy calcium carbonate compound. Light calcium carbonate is widely used in rubber products. It is often used in conveyor belts, hoses, rubber sheets, rubber cloth, rubber shoes and medical rubber products.
Ultrafine activated calcium carbonate has extremely small particle size and high activity, so its reinforcement is much better than that of light calcium carbonate, which is equivalent to precipitation method white carbon black, but ultrafine activated calcium carbonate generates large heat during mixing, and the rubber compound Fast curing speed. Ultra-fine activated calcium carbonate is often used in combination with other reinforcing agents for tire cushioning rubber and inner tubes, bicycle inner tubes and outer tubes, transmission belts, hoses, rubber shoes, and tape rubber products.
Technical index requirements for calcium carbonate used in rubber industry:
Heavy calcium carbonate used in the rubber industry can be divided into six models according to technical indicators: Type I 2000 mesh, Type II 1500 mesh, Type III 1000 mesh, Type IV 800 mesh, Type V 600 mesh, and Type VI 400 mesh.