Polyvinyl chloride products have low prices and a wide range of applications. They are widely used in construction materials, industrial products, plates, pipes, wires and cables, foaming materials, sealing materials and other fields. Blending polyvinyl chloride into the tread reclaimed rubber can improve the quality of reclaimed rubber products and expand the application fields of tread reclaimed rubber. In actual production, the dispersibility of PVC material in the tread reclaimed rubber directly affects the comprehensive index of the blended material, so how to improve the dispersibility of PVC in the tread reclaimed rubber? What should be paid attention to?
1. The significance of improving the dispersion of PVC in reclaimed tread rubber
The tire tread reclaimed rubber processed from waste tire tread rubber powder has weak interface adhesion with PVC during use, and when blended with PVC materials, the mechanical properties of the blend will decrease. Improving the dispersibility of PVC material in the tread reclaimed rubber can give the two better interface bonding properties, thereby improving the physical properties of the tread reclaimed rubber/PVC blend material.
2. Matters needing attention to improve the dispersion of PVC in reclaimed tread rubber
In actual production, improving the blending process and vulcanization process can improve the dispersion of the polymer in the tread reclaimed rubber, and the use of special compounding agents can also achieve this goal. It should be noted that the main components of the tread reclaimed rubber are natural rubber and styrene butadiene rubber, and there is a big defect in the processing of natural rubber-vulcanization is easy to occur under high temperature conditions. Therefore, when improving the dispersibility of PVC in reclaimed rubber by improving the process, we must pay attention to the choice of blending temperature and processing methods.
3. Methods to improve the dispersion of PVC in the tread reclaimed rubber
①Using compatibilizer: Using a suitable amount of compatibilizer in the tread reclaimed rubber/PVC blend material can improve the compatibility between the components, strengthen the interaction of 2LLYY813 between the phase interfaces, and increase the PVC in the tread reclaimed rubber It can improve the mechanical properties and elasticity of reclaimed rubber/PVC blends. Commonly used compatibilizers are NBR-18, NBR-26, and NBR-41.
②Improve the mixing process and vulcanization process
In the preparation process of the reclaimed tread rubber/PVC blend material, in order to avoid changes in the internal structure of the reclaimed rubber and PVC material that affect the performance, it is necessary to reasonably control the blending temperature and blending time, usually the blending temperature is controlled at 150-170℃ In between, the blending time is controlled at 12min. Choose a two-stage blending process to prepare high PVC content blend masterbatch under high temperature conditions, add rubber components at room temperature to make the required proportion of rubber compound, improve the dispersion of PVC in the tread reclaimed rubber, and avoid Vulcanization conditions and mastication temperature affect the properties of the blends and reduce the time that the reclaimed rubber is exposed to high temperatures.
In actual production, improving the dispersibility of PVC materials in the tread reclaimed rubber is of great significance to improve the overall performance of the blend. High-quality tread reclaimed rubber/PVC blend materials can be used to prepare waterproof materials, etc., with good performance, Long service life, the editor will continue to discuss with you later.
Exclusive original article [commercial authorization] reprint, excerpt and excerpt in any form are prohibited without written authorization. Focus on Hongyun rubber: learn the process formula and raw material technology of producing rubber products from recycled rubber to help you reduce costs and increase profits