Français
Styrene-Butadiene Rubber (SBR) is also known as polystyrene butadiene copolymer. Its physical properties, processing performance and product performance is close to the natural rubber, some performance Some properties such as abrasion resistance, heat resistance, aging resistance and vulcanisation speed is more excellent than natural rubber, can be used with natural rubber and a variety of synthetic rubber.
Styrene-butadiene rubber in the mixing agent dispersion difficulties, power consumption, heat, rubber quality by the temperature of the larger, so in the manufacture of J-benzene rubber compound, should be for its characteristics and the provisions of the mixing conditions. In the opening machine mixing, the more appropriate method is the formula of carbon black made of master refining rubber directly into the rubber, mixed with styrene-butadiene rubber rubber, in the absence of additives before the requirements of styrene-butadiene rubber and natural rubber first mixed evenly before joining. Since the wettability of SBR to the mating agent is poorer than that of natural rubber, the mixing time is longer than that of natural rubber. Taking 22 in ( 55.9 cm ) opening machine mixing tread rubber as an example, if the use of carbon black mother refining rubber, the mixing time is 25~30 min. without the use of carbon black mother refining rubber, the mixing time can be extended appropriately. The roller temperature should not be too high, generally below 55 °C for the front roller and below 50 °C for the rear roller. Rubber temperature is about 55~60 °C. The selection of capacity depends on the dosage of SBR, mixing 30% of SBR, its capacity is the same as natural rubber; mixing 50% of SBR, its capacity can be appropriately reduced.
Styrene-butadiene rubber mixing heat generation is large, the temperature rises quickly, so the mixing temperature should be lower than that of natural rubber. Matching agent in the styrene-butadiene rubber is more difficult to mix and disperse, so the mixing time should be longer than natural rubber. Mixing with the open refiner better roller, but easy to pack the cold roller, so the front roller temperature should be lower than the back roller temperature 5 ~ 10.C. Need to increase the number of thin passes and supplemental processing, in order to facilitate the uniform dispersion of the matching agent, with the mixing machine mixing should be used in two sections of the mixing, the capacity should be smaller. Mixing time is too long, plasticity change is not big, but will produce gel, affect the physical and mechanical properties. The discharge temperature should be lower than 130℃.
Styrene-butadiene rubber in the mixing agent dispersion difficulties, power consumption, heat, rubber quality by the temperature of the larger, so in the manufacture of J-benzene rubber compound, should be for its characteristics and the provisions of the mixing conditions. In the opening machine mixing, the more appropriate method is the formula of carbon black made of master refining rubber directly into the rubber, mixed with styrene-butadiene rubber rubber, in the absence of additives before the requirements of styrene-butadiene rubber and natural rubber first mixed evenly before joining. Since the wettability of SBR to the mating agent is poorer than that of natural rubber, the mixing time is longer than that of natural rubber. Taking 22 in ( 55.9 cm ) opening machine mixing tread rubber as an example, if the use of carbon black mother refining rubber, the mixing time is 25~30 min. without the use of carbon black mother refining rubber, the mixing time can be extended appropriately. The roller temperature should not be too high, generally below 55 °C for the front roller and below 50 °C for the rear roller. Rubber temperature is about 55~60 °C. The selection of capacity depends on the dosage of SBR, mixing 30% of SBR, its capacity is the same as natural rubber; mixing 50% of SBR, its capacity can be appropriately reduced.
Styrene-butadiene rubber mixing heat generation is large, the temperature rises quickly, so the mixing temperature should be lower than that of natural rubber. Matching agent in the styrene-butadiene rubber is more difficult to mix and disperse, so the mixing time should be longer than natural rubber. Mixing with the open refiner better roller, but easy to pack the cold roller, so the front roller temperature should be lower than the back roller temperature 5 ~ 10.C. Need to increase the number of thin passes and supplemental processing, in order to facilitate the uniform dispersion of the matching agent, with the mixing machine mixing should be used in two sections of the mixing, the capacity should be smaller. Mixing time is too long, plasticity change is not big, but will produce gel, affect the physical and mechanical properties. The discharge temperature should be lower than 130℃.
