At present, there are two main methods for reducing the production cost of natural rubber products: increasing the amount of rubber filler and replacing the product with natural rubber. The tire reclaimed rubber can replace some natural rubber in the production of natural rubber products, so as to reduce the cost of raw materials; There is a certain gap between the mechanical strength of the tire reclaimed rubber and the natural rubber processed by the waste tires. It also contains a certain proportion of rubber filler. Does the natural rubber product containing the tire reclaimed rubber do not need to be filled with rubber filler? How to use it?
1. Natural rubber products containing tire reclaimed rubber require rubber filler
Compared with natural rubber, tire reclaimed rubber is much lower in price and is the lowest price of natural rubber substitute raw materials, which can significantly reduce the cost of natural rubber products.
From the performance point of view, the addition of tire reclaimed rubber and rubber filler will lead to a decrease in the mechanical strength of natural rubber products, but the tire reclaimed rubber has good compatibility with natural rubber and good fluidity. Reducing the cost and improving the processing technology of the rubber compound, but it can not increase the volume of the product; from the compatibility point of view, the rubber filler which can be uniformly dispersed in the natural rubber can also be uniformly dispersed in the tire reclaimed rubber; from the price point of view, The price of rubber filler is lower than that of high-quality tire reclaimed rubber. Under the premise of increasing the volume of the product, the cost can be further reduced. Therefore, the natural rubber product containing the tire reclaimed rubber needs rubber filler.
2. Types of fillers that can be added to natural rubber products containing tire reclaimed rubber
Reinforced rubber filler improves rubber compounding performance and improves physical and mechanical strength of natural rubber products. In natural rubber products containing tire reclaimed rubber, it is necessary to add reinforcing fillers such as carbon black and white carbon black to improve the mechanical strength of rubber products. However, from the cost point of view, the reinforcing rubber filler is higher than the tire reclaimed rubber price, so it is necessary to use a certain proportion of non-reinforcing low-cost rubber filler to increase the product volume and reduce the production cost, calcium carbonate, clay, Talc can be used.
3. Non-reinforcing fillers used in natural rubber products containing tire reclaimed rubber
The use of low-cost rubber fillers in natural rubber products containing tire reclaimed rubber can reduce more production costs, but excessive use will affect the mechanical strength of natural rubber products. Taking light calcium calcium carbonate as an example, research shows that: in natural rubber In combination with the tire reclaimed rubber, the internal stress concentration point of the rubber compound increases with the increase of the amount of light calcium, which leads to the decrease of the mechanical strength, elongation at break and wear resistance of the rubber compound; The natural rubber/tire reclaimed rubber is used and the force of the macromolecular chain in the rubber compound is lowered, and the mechanical strength is lowered. Therefore, when filling a low-cost filler in a natural rubber product containing tire reclaimed rubber, it is necessary to control the amount and calculate the proportion of the filler contained in the tire reclaimed rubber.
In summary, the addition of a certain proportion of rubber filler in the natural rubber product containing reclaimed rubber can further reduce the cost, but can not be filled with low-cost fillers for cost and without limitation, and all should be based on the quality of rubber products.