Reinforcing agent is an important compounding agent in reclaimed rubber and product manufacturing and processing, which can remarkably improve the tensile strength of rubber compound and improve the abrasion resistance and tear resistance of reclaimed rubber products. There are many kinds of reinforcing agents used in the rubber products industry, and the effects of different reinforcing agents are different. The types and amounts of reinforcing agents used in different reclaimed rubber products are different. Recycled plastic products with the reinforcing agent can be divided in two categories: reinforcing filler and reinforcing resin.
First, reinforcing filler
Reinforcing filler has both reinforcing properties, but also can be used as a filler, to improve the physical properties of reclaimed rubber products, to extend the service life of products and reduce the cost of rubber products. Recycled plastic products commonly used reinforcing filler carbon black, white carbon black, silicate, with carbon black and white carbon most common.
1, carbon black: carbon black in the rubber products industry is the largest amount of compounding agent, it has a good reinforcing effect on rubber used to make rubber tires and other rubber products. Carbon black has a reinforcing effect on the recycled rubber compound mainly in combination with its surface activity and the rubber compound. When the recycled rubber material is deformed by the external force, molecular chain slippage and a large number of physical adsorption can absorb the impact of external forces, external force caused by friction or hysteresis deformation buffer; uneven structure of carbon black, containing many internal Active large active points, in which unpaired electrons can react with the recycled rubber compound, the molecular chain is relatively easy to move on the surface of carbon black, but not easily separated from the carbon black, renewable rubber and carbon black constitute A strong, slippery bond that causes a reinforcing effect. Recycled plastic products used in most of the carbon black fine ion carbon black, in a variety of black reclaimed rubber products are widely used in the actual production of two rubber compound usually with 1 carbon black.
2, white carbon black: white carbon black and carbon black have similar structural characteristics, it is usually used in white, light-colored or transparent recycled rubber products instead of carbon black as a reinforcing filler in the formula. White carbon black, also known as hydrated silica, activated silica and precipitated silica, with high electrical insulation, porosity and water absorption, and excellent reinforcement and transparency in the field of reclaimed rubber widely. White carbon black production process with physical and chemical methods, recycled rubber industry with the use of white carbon black more chemical production, in addition to light-colored, color recycled plastic products, the car tires with fine ion carbon black can also be used Reduce tire hysteresis loss, reduce rolling resistance and improve the wear resistance of reclaimed rubber tires.
Second, reinforcing resin
Recycled plastic products in addition to reinforcing fillers in addition to reinforcing resin, as renewable rubber products, reinforcing agent, improve the physical and mechanical properties of products. Common high-styrene resin, phenolic resin. Among them, high styrene resin is not helpful to improve the tensile strength of reclaimed rubber, but it can significantly improve the flexing resistance and tearing strength of rubber. Therefore, it can be used in the production of reclaimed rubber with high hardness and high wear resistance.
Reinforcing the biggest role is to improve the tensile strength of reclaimed rubber, but the high amount of reinforcing agent will lead to the increase of Shore hardness of reclaimed rubber, tensile elongation at break of reclaimed rubber, so reclaimed rubber and its products in the formulation of the reinforcement The dosage should still be appropriate.
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