Butyl reclaimed rubber is a type of reclaimed rubber produced from waste butyl inner tube as the main raw material. It has high airtightness and good plasticity. Generally, butyl reclaimed rubber (including all reclaimed rubber) does not need to be plasticized. However, under certain circumstances, butyl rubber reclaimed plastic or proper plasticity, can be a small increase in plastic reclaimed butyl rubber to improve processing performance.
Butyl rubber retains the short structural characteristics of butyl rubber molecular chain, with cold flow, low molecular unsaturation, chemical structure stability, it is difficult to obtain plastic effect, the processing difficulties of their own.
To improve the mechanical plastic effect. When using open mill plastic, should be low temperature, small roller operation, the method is to start with a larger roller to the rubber material in the roll and wrap the roller, and then adjust the roller pitch small plasticizing. For ease of operation, the front roll temperature should be lower than the rear roll about 10 ℃. When the temperature is raised, the film should be cut off, then cooled and then plasticized. Therefore, butyl reclaimed rubber alone mechanical shear is difficult to masturbate. The viscosity must be reduced by a combination of peptizer chemical reaction and mechanical shearing. Commonly used peptizing agents are dicumyl peroxide, xylene mercaptan, pentachlorothiophenol, etc., the amount is generally 0.5 to 1.0 parts. When plasticizers are used, the plasticity of the plastic increases as the temperature rises.
Butyl reclaimed rubber plasticizing effect is better. Mixing machine with plastic, mixing temperature of about 120 ℃, and add chemical peptizer, the effective amount of about 2 copies. Decomposition agent to the best effect of dicumyl peroxide, followed by diphenylbenzenethiol and pentachlorothiophenol, plastic capacity installed as a good. Butyl rubber reclaimed plastic, should be kept clean, non-mixed with other plastic, otherwise affect product quality. Therefore, before plastic plastic machine must be cleaned.
Hebei Hongyun company produces high-strength butyl rubber reclaimed by Germany far infrared desulfurization and in the production process by adding 5% butyl rubber, after the international reduction of rubber molecules made of new technologies, Mooney viscosity of about 50 degrees, the product air tightness Strong, heat-resistant, ozone-resistant, anti-aging, chemical resistance, shock absorption, electrical insulation properties, high strength, feel good elasticity, environmental tasteless, without the use of mastication process, not only can save raw material costs, Electricity is a good material for producing high-tightness rubber products and shock-absorbing products.
Hongyun reminds you: Butyl reclaimed rubber must be plasticized before use can be used.
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