Rubber Chem Encyclopedia

Reasonable use of rubber filler to improve the elasticity of recycled rubber products

Create Date:2019-02-22 08:53:08Click volume:460
Reasonable use of rubber filler to improve the elasticity of recycled rubber products

There are two most effective ways to improve the elasticity of recycled rubber products. One is to use high-adhesive reclaimed rubber, and the other is to use original rubber. The principle is to increase the rubber content of recycled rubber products; rubber fillers are used to reduce rubber products or regenerate. The material cost of the raw material of the rubber product is achieved by reducing the rubber content of the rubber compound and increasing the volume of the product. Therefore, its addition will undoubtedly have a certain negative impact on the elasticity of the recycled rubber product, but in terms of cost, rubber filler is required. Therefore, understanding the interaction between the rubber filler and the elasticity of the reclaimed rubber product is of great significance for improving the elasticity of the reclaimed rubber product.

Rubber fillers can be roughly classified into reinforcing fillers and non-reinforcing fillers according to their reinforcing properties. Different types of rubber fillers have different effects on the elasticity of recycled rubber products.

Carbon black is a typical reinforcing filler in rubber fillers. It has obvious reinforcing effect in rubber products, and can now improve the physical and mechanical strength of reclaimed rubber vulcanizates. However, for rubber elasticity, regenerated rubber products have elastic and resilience. It will decrease with the increase of the amount of carbon black. The smaller the particle size, the greater the surface activity and the better the reinforcing performance, the greater the influence of carbon black on the elasticity of the reclaimed rubber. Therefore, it is best to avoid using super resistant in high elastic rubber products. Carbon black, medium super wear-resistant carbon black or high wear-resistant carbon black, etc., replaced by semi-reinforcing carbon black or soft carbon black.

Compared with carbon black, inorganic fillers have a poor reinforcing effect in reclaimed rubber. Although the elasticity of reclaimed rubber products will also decrease with the increase of the amount of inorganic fillers, the reduction is much smaller than the same amount of carbon black, so it is high. In the production of elastic reclaimed rubber products, the manufacturer can also increase the relationship between the coordination cost and the elasticity of the inorganic filler dosage; theoretically, when the filling amount of the inert inorganic filler does not exceed 30, the elastic rubber vulcanizate elastic decline can be neglected; Strong inorganic fillers are cheaper than reinforcing oils such as reinforcing elastics, which is a good choice.

In actual production, the effect of carbon black and inorganic filler in reclaimed rubber is different, so there is also a great difference in the elasticity of reclaimed rubber vulcanizate; EPDM and EPDM reclaimed rubber are more than other types of rubber. Recycled rubber has good filling performance, but carbon black and inorganic filler have the opposite effect on it. Generally, in EPDM rubber, the vulcanizate obtained by filling the same proportion of carbon black has a lower elastic reduction than the same proportion of inorganic filler. The vulcanizate has a small decrease in elasticity.

Compared with the original rubber, the reclaimed rubber has relatively low rubber content and slightly poor elasticity. However, with the continuous advancement of reclaimed rubber production technology, reclaimed rubber is no longer rejected by high-elastic rubber products manufacturers; In the case of high rubber products, rubber filler is an important factor affecting the elasticity of the product; the manufacturer of high elastic reclaimed rubber products can select the appropriate kind of rubber filler according to the actual demand and cost budget of the product.