Vulcanized rubber powder is a powdery substance made of waste rubber as raw material, crushed or ground by mechanical processing, and is a fragment of a cross-linked network structure in the microscopic structure, containing a small amount of unsaturated double bonds, with the function of re-cross-linking, and can be used with rubber or other polymer materials to prepare new materials. Vulcanized rubber powder has three main uses: as a filler, as an asphalt or resin modifier, and as a substitute for raw rubber.
1. Vulcanized rubber powder is used as a filler
Vulcanized rubber powder can be used as a filler in ordinary industrial rubber products such as seals, hose outer layers or low-cost plastic products, partially replacing carbon black and inorganic fillers, which can reduce the cost of raw materials by about 15%-30% under the premise of ensuring basic mechanical properties. Compared with inorganic fillers such as calcium carbonate and talc, vulcanized rubber powder has a smaller density and can effectively reduce the overall density of the product. It has the basic performance characteristics of rubber and improves the feel and elasticity of the rubber material. The fluidity in the mold is good, which can improve the processing process of the compound and avoid uneven product performance caused by packing agglomeration.
2. Vulcanized rubber powder as asphalt and resin modifier
Vulcanized rubber powder is mainly used as a modifier for asphalt and resin, mainly in the field of road engineering and polymer composites.
(1) Vulcanized rubber powder is used as an asphalt modifier in road construction, which can significantly improve the rutting resistance, crack resistance and aging resistance of the pavement, reduce temperature sensitivity, and extend the service life of the pavement. In the construction of roads in cold areas, the cracking risk of rubber asphalt pavement is reduced by more than 40% compared with ordinary asphalt pavement. Reduce the deformation of asphalt ruts at high temperatures and improve road durability.
(2) As a resin modifier, vulcanized rubber powder is widely used in PVC, PP, PE and other resin systems to improve the toughness, impact resistance and wear resistance of resin. The elastomer characteristics of vulcanized rubber powder can be used as a "stress concentration point", inducing silver grains and shear bands in the resin matrix, effectively absorbing impact energy, and improving the low-temperature toughness and impact resistance of the product.
3. Vulcanized rubber powder as a substitute for raw rubber
Vulcanized rubber powder has the characteristics of rubber, which can directly replace some raw rubber to produce rubber products, reduce raw material costs, and improve the low-temperature performance of rubber. In molding processes such as injection molding and extrusion, the low internal friction characteristics of rubber powder make melt fluidity better, reduce problems such as lack of material E5LYY1017 products, and improve production efficiency. In the production of rubber products such as shock absorbing pads, 100% vulcanized rubber powder can be used with sulfur-accelerator system for direct molding; Ultra-fine vulcanized rubber powder can be used in high-performance rubber products such as tire tread and sealing strips, and can be activated when necessary, which is more compatible with rubber and reduces costs while maintaining the physical and mechanical properties of rubber products.
The production process of vulcanized rubber powder is simple, low price, low density, no flying during rubber mixing, good fluidity in the mold, and has a wide range of applications in the rubber and non-rubber industry. At present, the common vulcanized rubber powder on the market includes tire rubber powder, nitrile rubber powder, EPDM rubber powder, latex rubber powder, etc., and different varieties of rubber powder have different uses. With the tightening of environmental protection regulations and the intensification of resource shortages, the application range of vulcanized rubber powder will become more and more extensive.
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