The heat-resistant conveyor belt is a conveyor belt that can transport high-temperature materials such as coke, cement, castings and the like by heat-resistant rubber and other materials. The function of the rubber is to bond the core canvas into a whole. The adhesive, fatigue resistance, plasticity and scorch resistance of the rubber compound are quite high; the use of butyl rubber and butyl reclaimed rubber to produce a heat-resistant conveyor belt can meet the requirements of the rubber process performance and reduce Raw material costs.
Butyl rubber, 80 parts; butyl reclaimed rubber, 40 parts; zinc oxide, 15 parts; stearic acid, 1 part; carbon black, 30 parts; clay, 15 parts; polyisobutylene, 10 parts; rubber oil, 20 parts Alkyl phenolic resin, 5 parts; bismuth diethyldithiocarbamate, 1 part; accelerator, 2.5 parts; sulfur, 1 part.
The vulcanized vulcanized rubber has high mechanical strength. Generally, the rubber compound in each part of the heat-resistant conveyor belt adopts a sulfur vulcanization system. In the butyl heat-resistant conveyor belt formula, 1 part of sulfur, 1 part of accelerator TMTD and 1.5 parts of promotion Agent DM can achieve the desired vulcanization effect.
The polyisobutylene is polymerized from isobutylene by polymerization, and the typical saturated linear polymer is added to the butyl heat-resistant conveyor belt to significantly improve the impact strength, flexibility and tear resistance of the conveyor belt. , anti-erosion performance.
Carbon black is the most expensive compounding agent in the rubber products industry. N220, N330, N550 and N660 are common varieties. Carbon black N550 can be used in various natural rubbers and synthetic rubbers. It is easy to disperse in butyl heat-resistant conveyor belts and has excellent reinforcing performance. It can improve the stiffness of rubber materials, improve the processing performance and physical and mechanical strength of rubber compounds. Significantly improve the high temperature resistance and thermal conductivity of butyl rubber, and extend the performance of butyl rubber / reclaimed rubber heat-resistant conveyor belt wipes.
The main components of clay are aluminum oxide and silicon oxide compounds. The viscosity is high, the stiffness is high, the shrinkage is small, the plasticity is good, and the surface of the extrudate is smooth and bright. Although carbon black has an irreplaceable advantage in the processing of rubber products, At the same time, there are certain defects, and the combination with clay can just compensate for the insufficiency of carbon black, and further improve the processing performance and mechanical properties of the vulcanized rubber compound. Nano-grade clay has good dispersion performance in rubber compound, but clay has certain influence on the reinforcing performance of carbon black in practical application. Therefore, nano-grade clay is rubbed in butyl rubber and butyl reclaimed rubber heat-resistant conveyor belt. The amount in the compound should not be too high.
Paraffin oil has excellent heat resistance, low volatile content, high flash point and low aromatic content. It improves the fluidity, plasticity and heat resistance of the rubber compound, improves the viscosity of the rubber compound, reduces the consumption of vulcanizing agent, and reduces the cost of raw materials. The chemical stability of the rubber compound is high, and the content of aromatic hydrocarbons, nitrogen, oxygen, sulfur and the like is extremely low, that is, it can be used as a softening agent and can also play a lubricating role; in general, the paraffin oil and mineral oil can be used in the heat-resistant conveyor belt. Use in a ratio of 1:1.
Regarding the role of zinc oxide in combination with stearic acid, the small series will not be paralyzed again!