The V-belt is made of multiple identical vulcanized multi-layer rubber canvases connected with rivets or bolts, which has the characteristics of high strength, high tensile force, non-elongation, high temperature resistance, acid and alkali resistance, and corrosion resistance. The red active V belt canvas rubbing rubber is generally processed with natural rubber as the main raw material, and the appropriate use of red reclaimed rubber can effectively reduce the cost of raw materials. So what problems need to be considered when mixing red reclaimed rubber with V-belt canvas rubber? How to design the formula of red active V with canvas rubbing with reclaimed rubber?
1. The performance requirements of the active V belt canvas rubbing glue
The active V-belt canvas rubbing can endow the V-belt with good physical and mechanical properties, including high tensile strength, good wear resistance and flexural resistance, to ensure that the transmission belt can withstand a certain tensile force during the working process without easy breakage, can resist the friction among the belt and the pulley, and prolong the service life.
The rubber used in the V-belt canvas wiping requires that the rubber used has good adhesion, and has good wetting and adhesion ability to canvas fibers (such as cotton and synthetic fibers) before vulcanization; Good elasticity, E4LYY124 elongation at break and flexural resistance ensure that the rubber compound is not easy to crack after repeated bending and deformation; A certain tensile strength and tensile stress balance the rigidity and elasticity of the rubber compound, and avoid excessive deformation caused by too much softness or stress concentration caused by too hardness; Good wear resistance, aging resistance, resistance to friction loss among belt body and pulley, adapt to various working environments.
2. Activate V belt canvas rubbing glue mixed with red reclaimed rubber vulcanization formula
40 parts of natural rubber, 60 parts of red reclaimed rubber, 3 parts of zinc oxide, 1.5 parts of stearic acid, 1 part of antioxidant RD, 0.5 parts of antioxidant BLE, 12 parts of silica, 9 parts of magnesium carbonate, 3.5 parts of coumaron resin, 3.5 parts of engine oil, 6 parts of lithopone, 2 parts of iron red, 3 parts of rubber red, 0.55 parts of accelerator M, 1.05 parts of accelerator DM, 0.1 parts of accelerator TMTD, 2.1 parts of sulfur; Total 148.8 copies.
3. Problems that need to be considered when mixing red reclaimed rubber with red reclaimed rubber with red active V-belt canvas rubber
When using red reclaimed rubber to reduce the cost of red reclaimed rubber, it is necessary to comprehensively consider the balance of the properties of the rubber compound, as well as the processing process of the rubber compound, especially the properties of the fluidity and vulcanization speed of the rubber compound, which need to be matched with the production equipment and process parameters to ensure the smooth progress of the production process. Compared with pure natural rubber, the rubber mixed with red reclaimed rubber has better fluidity, plasticity and aging resistance.
4. Red active V belt canvas rubber, mixed with red reclaimed rubber formula design points
(1) Rubber raw materials: natural rubber/red reclaimed rubber and rubbing with active V belt canvas, natural rubber and red reclaimed rubber as the basic rubber material, can provide good elasticity and tensile strength, it is recommended to choose reclaimed rubber, choose products with good elasticity, small specific gravity, no impurities, and stable quality.
(2) Choice of reinforcing agent: when silica is used as a reinforcing agent, its fine particles can be filled among the rubber molecules, enhance the strength and wear resistance of the rubber compound, and effectively improve the mechanical properties and wear resistance of the natural rubber/red reclaimed rubber active V belt canvas rubber; Magnesium carbonate is used in an appropriate amount to improve the heat resistance and chemical resistance of the rubber.
(3) Vulcanization system: When using natural rubber and red reclaimed rubber as the main raw materials to prepare red active V-belt canvas rubber, sulfur-accelerator system is mostly used, and the accelerator M/DM/TMTD can be used together to adjust the vulcanization speed, ensure the full vulcanization of the rubber material, form a stable vulcanized rubber network structure, and improve the physical and mechanical properties and durability of the finished product of the active V-belt.
(4) Antioxidant: Antioxidant RD and antioxidant BLE are used together to significantly improve the resistance to thermal and oxidative aging, ozone aging and flexural resistance of rubber products. Antioxidant RD has excellent protection against aging caused by heat and oxygen, but has poor protection against flexural aging. Antioxidant BLE has good protective properties against heat, oxygen, ozone, climate and flexure.
(5) Colorant: When red reclaimed rubber is used to reduce the cost of red reclaimed rubber for red active V belt canvas rubber, the colorant mainly uses iron red and rubber red, and the dosage is reasonably controlled, which can not only ensure the uniform appearance and color of the rubber material, but also will not affect the performance of the rubber material.
(6) Softener: Engine oil is used as a softener to further improve the processing performance of natural rubber/red reclaimed rubber and glue.
When using red reclaimed rubber to reduce costs in the red active V-belt formula produced with natural rubber as the main raw material, rubber product manufacturers also need to appropriately adjust the production process parameters, and discuss related issues with you in the future.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits