Latex reclaimed rubber is an important resource recycling material, which is widely used to replace natural rubber in the rubber industry. Due to the special properties of latex recycled rubber, adjusting its hardness has become a key task in the production of products. A reasonable vulcanization formula can effectively adjust the hardness of latex recycled rubber products, and the following will explain the matters that need to be paid attention to in the vulcanization process from multiple perspectives.
1. It is very important to choose an appropriate vulcanization system. The choice of vulcanizing agent can have a significant impact on the hardness of the vulcanizing product. Rubber products that usually use vulcanizing agents to start the reaction are generally harder. Different vulcanizing agents have different hardness adjustment effects, so they need to be selected according to actual needs. Generally, the larger the amount of sulfur or DCP, the higher the hardness of vulcanized rubber products.
2. Controlling the vulcanization temperature and time is also the key to adjusting the hardness of latex recycled rubber products. During the vulcanization process, the temperature is too high and the hardness of the product is too high, and the temperature is too low and the hardness is not enough. The vulcanization time should also be precisely controlled to ensure the stability and consistency of the hardness of the product. Generally, high-hardness products are mostly vulcanized at high temperature and in a short time, while low-hardness products are generally vulcanized at low temperature for a long time. The vulcanization time and temperature need to be determined according to different glue content and different hardness requirements, and it is best to do a comprehensive analysis in combination with the dosage of vulcanizing agent.
3. The choice of filler will also have an impact on the hardness of YY23-817 natural latex recycled rubber products. Depending on the type and content of the filler, the hardness of the recycled rubber product can be adjusted. Commonly used fillers such as calcium powder, clay, silica, carbon black, etc., need to be added in an appropriate amount according to the required hardness of the product during the application process. The higher the fineness of carbon black, the better the hardening and hardening, the hardening and reinforcing effect of N110, N220 and N330 carbon black is more obvious, but it will lead to processing difficulties when used in a large number of extruded or injection molding products, and N660 or N774 carbon black is generally used in extruded products.
4. The influence of plasticizers on latex recycled rubber products is also obvious. The first is the amount of plasticizer, the larger the amount of plasticizer, the lower the hardness of rubber products, and vice versa; Only by determining the amount of plasticizer can the hardness of rubber products be adjusted by determining the amount of filler. In addition, Hongyun Technology Department found that the molecular weight of plasticizers will also have an impact on rubber hardness; When the molecular weight is large, the adjustment range of rubber hardness is large, and the plasticizer with small molecular weight will volatilize when mixing and vulcanization, and has little impact on adjusting the hardness of rubber products.
5. Another factor that needs to be considered is the quality of HY latex recycled rubber. Good quality recycled latex has uniform particle size distribution and low impurity content, which will help to improve the hardness control ability of the product. Therefore, high-quality recycled rubber raw materials should be selected during the production process, such as extrusion or injection molding, and the necessary filtration is recommended.
In the vulcanizationformula to adjust the hardness of latex recycled rubber products, it is necessary to pay attention to the selection of vulcanizing agents, reasonable control of vulcanization temperature and time, the addition of fillers and plasticizers, and the quality of recycled rubber. Only by reasonably grasping these aspects can we scientifically control the vulcanization hardness of recycled rubber products.
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