Recycled rubber refers to the physical and chemical processes of waste vulcanized rubber such as crushing, heating, mechanical and chemical treatment, so that it can be re-vulcanized from an elastic state to a certain plasticity and viscosity. Recycled rubber has certain plastic and physical and mechanical properties, and can be re-vulcanized, which is in line with the basic characteristics of raw rubber. Therefore, recycled rubber can be used alone as raw rubber or in combination with raw rubber to reduce the cost of rubber and improve the processing performance of rubber materials.
The use of recycled rubber in the production of rubber products offers the following 10 advantages:
1. Recycled rubber is cheap and stable
The cost of rubber products is mainly affected by the price of natural rubber and synthetic rubber, the price of recycled rubber is only 1/5-1/4 of the price of virgin rubber, and contains a large amount of anti-aging agents, softeners, zinc oxide and carbon black that can be reused E5LYY1024. The use of some recycled rubber in rubber products can greatly reduce costs; The prices of natural rubber and synthetic rubber are greatly affected by external factors and fluctuate violently, while the price of recycled rubber is relatively stable.
2. Low power consumption of recycled rubber
Due to the excellent plasticity of recycled rubber and the uniform dispersion of the compound, the power required for compound mixing is much lower than that of other raw materials. If the power required for compounding natural rubber is 100, styrene-butadiene rubber is 130, and recycled rubber is only 60. Recycled rubber is easy to mix with raw rubber and compounding agents, and after mixing, the mixing not only has uniform quality of the compound, but also shortens the working time and reduces power consumption.
3. Easy to recycle the film and press
Recycled adhesive can play a lubricating role and improve the fluidity of the compound. Compared with pure natural rubber or synthetic rubber compounds, compounds mixed with recycled rubber are easier to operate in processes such as sheeting and calendering.
4. Less heat generation during the processing of recycled rubber
Recycled rubber generates less heat than new rubber during compounding and other processing. The use of recycled rubber can reduce the heat generation of compounding, hot smelting, calendering, extrusion and other processes, and avoid scorching caused by excessive glue temperature, which is especially important for rubber with high carbon black content.
5. The expansion and contraction of unvulcanized rubber are small
The expansion and contraction of unvulcanized rubber mixed with recycled rubber are much smaller than that of pure new rubber during processing, and the processing is easier to control, the shape and size of the finished product are accurate, and the appearance defects of semi-finished products are few.
6. Recycled glue makes plasticity more stable
The plasticity and uniformity of various properties of natural rubber are poor, and the plasticity increases sharply after plasticization. Recycled rubber is minimally affected by plasticizing. Therefore, the processing of rubber mixed with recycled rubber is more stable and can ensure uniform product quality.
7. Recycled glue reduces the sensitivity of rubber to heat
Natural rubber and synthetic rubber unvulcanized rubber are highly heat-sensitive and soften significantly with the increase of temperature. The incorporation of recycled adhesive can reduce the heat sensitivity of the compound, reduce the thermoplasticity of the compound, and make it easier to maintain the original shape during molding and vulcanization.
8. Good vulcanization performance of recycled glue
The vulcanization speed of recycled rubber is fast, and the vulcanization tendency is small. The vulcanization rate of the rubber mixed with recycled rubber is stable, fast and the vulcanization flatness is excellent. Vulcanization is a softening phenomenon caused by persulfurization, and the recycled rubber complex has almost no such tendency, and the combination with new rubber can significantly reduce the reduction.
9. Recycled rubber improves the aging resistance of rubber products
Recycled rubber has been pre-treated with vulcanization, compounding, oxidation and other treatments, and the rubber hydrocarbons are in a stable state and are not easy to change, which can improve the resistance of natural aging and thermal oxygen aging of products. Products mixed with recycled rubber generally have good aging resistance, and the weather resistance is particularly prominent in sunlight.
10. Recycled rubber helps to improve the oil resistance of rubber products
The polarity of recycled rubber is greater than that of ordinary vulcanized rubber, which can improve the oil resistance of rubber products.
Recycled rubber is the main raw material for cost reduction in the rubber products industry, which contains a lot of carbon black and zinc oxide, which can reduce the amount of carbon black and zinc oxide in the formula after mixing. In actual production, the more recycled glue is not used, the better, product manufacturers need to choose the appropriate variety of recycled rubber according to the product use environment and performance requirements, reasonably determine the mixing ratio, and appropriately adjust the formula and process parameters to achieve greater cost reduction under the premise of ensuring the quality of the product.
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