The main function of the rubber triangle belt compression layer compound is to buffer, and it needs to undergo repeated bending and compression deformation during the movement process. Therefore, the aging resistance of the rubber compound used for heat aging, fatigue aging resistance and flexing aging resistance is very high. Mostly, natural rubber is used as the main raw material, and the right amount of recycled rubber is used together. In actual production, how to further improve the aging resistance of natural rubber/recycled rubber triangle tape compression layer and prolong the service life?
Natural rubber has good elasticity and high mechanical strength, but it has poor heat-resistant oxygen aging and ozone resistance. The V-belt shrink layer rubber needs to be continuously subjected to compression and stretching, which is prone to flex fatigue and aging cracking. The manufacturer can usually adjust the type and amount of each compounding agent in the natural rubber/recycled rubber triangle belt formula to improve the aging resistance of the compression layer rubber.
1. Use anti-aging agent
Rubber anti-aging agent can significantly delay the aging time of rubber products and prolong the service life. It is the best rubber auxiliaries for improving the aging resistance of the V-belt shrink layer rubber. The aromatic secondary amine anti-aging agent A is hot, oxygen and flex. The aging phenomenon caused by weather and fatigue has a significant protective effect; the anti-aging agent D has a good protective effect on heat, oxygen and flexing aging, and has an inhibitory effect on harmful metals. When the natural rubber and the reclaimed rubber are used to prepare the V-belt compression layer, the anti-aging agent A and the anti-aging agent D can be used together to improve the heat-resistant oxygen aging, the flexural aging resistance and the fatigue aging resistance of the rubber compound.
2. Use semi-reinforcing carbon black
Semi-reinforcing carbon black is a combination of reinforcing and filling in natural rubber. It is a kind of soft carbon black. It can be used in the natural rubber/recycled rubber triangle belt compression layer glue to significantly improve the reclaimed rubber. Elongation and elasticity, reduce the heat generated by the compression layer during operation, and improve the aging resistance of the V-belt compression layer to a certain extent; semi-reinforcing carbon black and carbon black can be used to prepare heat-resistant, V-belt compression layer adhesive with better aging resistance.
3. Natural rubber / reclaimed rubber and used to prepare triangle tape compression layer rubber reference formula
100 parts of natural rubber, 30 parts of recycled rubber, 2.6 parts of sulfur, 0.6 parts of accelerator DM, 1 part of accelerator CZ, 3 parts of zinc oxide, 2.5 parts of stearic acid, 1 part of antioxidant A, 1 part of anti-aging agent D, ancient 4 parts of Marlon resin, 5 parts of softened heavy oil, 20 parts of carbon black, 40 parts of semi-reinforcing carbon black, 40 parts of calcium carbonate; total: 250.7 parts.
When the natural rubber and the reclaimed rubber are used to produce the rubber triangle strip compression layer, the type and amount of the compounding agent in the formula can be reasonably selected to further improve the aging resistance of the rubber compound; in addition, the waste tire tread rubber powder is used as the main raw material. The tire tread reclaimed rubber itself has high strength, good elasticity and small specific gravity. It can significantly improve the tear strength and flex resistance of the rubber product itself during use. It can be used in the production of the V-belt compression layer glue to reduce the cost. At the same time improve the aging resistance of the compression layer.