Description
In recent years, with the rapid development of my country’s rubber industry, the amount of calcium carbonate has been continuously increased. 1) Tires: Light calcium carbonate and nano-calcium carbonate often partially replace low-structure carbon black and silica for rickshaw tire casing rubber (over 70 parts) and inner tube rubber, car tire carcass ply rubber, inner liner rubber, inner liner and inner tube rubber to reduce production costs. In addition, the use of nano-calcium carbonate and ultra-fine active zinc oxide to replace ordinary zinc oxide can improve the tensile strength, elongation at break, flexural resistance and fatigue resistance of car tire tread rubber. 2) Hose and tape: Light calcium carbonate and nano-calcium carbonate are used for hoses and tapes, one is to act as a white reinforcing filler, and the other is to improve the dispersibility of the rubber compound. Calcium carbonate can be used in ordinary hoses, colored hoses, hydraulic hoses and short fiber reinforced hoses in rubber hoses, and can be used in conveyor belts, transmission belts and timing belts in adhesive tapes. 3) Rubber shoes: Calcium carbonate can adapt to different color requirements and can improve the mixing and extrusion performance of rubber materials. It is widely used in rubber shoes and is often used in combination with carbon black, silica, titanium dioxide and clay for rubber shoes. of the upper, sole and heel of the shoe. 4) Wire and cable: Calcium carbonate is generally used with carbon black, white carbon black, clay and talc, etc. and used as a reinforcing filler for the sheath of mining wire and cable, marine wire and cable, high-voltage wire and cable, and electrical wire and cable rubber. In the wire and cable compound with chlorine-containing rubber, such as CR, chlorinated polyethylene rubber (CM) and chlorinated cis-butadiene rubber as the main material, calcium carbonate not only acts as a reinforcing filler, but also reduces the amount of rubber compound. Acidity and absorption of the hydrogen chloride generated during the processing of the rubber compound, thereby avoiding the effect of vulcanization delay and reversion of the rubber compound, and at the same time improving the extrusion performance of the rubber compound.
