The inner liner of automobile tires is in direct contact with compressed air, and its main role is to maintain the air tightness inside the tire, prevent gas leakage, and ensure the normal operation of the tire and the driving safety of the vehicle. However, compared with ordinary butyl rubber, chlorobutyl rubber is more expensive, can it be used in combination with reclaimed rubber in tire innerliner processing? What kind of reclaimed rubber can be used with chlorinated butyl reclaimed rubber to produce tire airtight rubber compounds?
1. Butyl reclaimed rubber
Butyl reclaimed rubber has good air tightness, heat resistance, aging resistance, etc., and good compatibility with chlorobutyl rubber, replacing part of chlorobutyl rubber to produce tire innerliner rubber can effectively reduce the cost of raw materials, can improve the adhesive roller of the rubber compound, improve processing performance, reduce dynamic compression heat accumulation, and maintain good air tightness and thermal and oxidative aging resistance of the finished inner layer.
55 parts of chlorinated butyl rubber, 45 parts of butyl reclaimed rubber, 4 parts of zinc oxide, 1 part of magnesium oxide, 1 part of stearic acid, 1 part of antioxidant D, 35 parts of carbon black N660, 12 parts of naphthenic oil, 0.8 parts of accelerator DM, 0.15 parts of accelerator TMTD, 1.65 parts of sulfur; Total 156.6 copies.
2. Chlorobutyl reclaimed rubber
Chlorobutyl reclaimed rubber is processed from waste chlorinated butyl rubber products such as medical butyl rubber stoppers as the main raw materials, which retains the basic performance characteristics of chlorobutyl rubber, and the price is much lower than that of chlorobutyl rubber. The airtightness and durability of the finished innerliner adhesive meet the requirements.
65 parts of chlorobutyl rubber, 15 parts of chlorobutyl reclaimed rubber, 20 parts of natural rubber, 5 parts of zinc oxide, 0.5 parts of magnesium oxide, 2 parts of stearic acid, 15 parts of carbon black N990, 30 parts of silica, 30 parts of calcium carbonate, 50 parts of clay, 10 parts of paraffin oil, 2 parts of tackifying resin, 2 parts of accelerator DM, 2 parts of accelerator TMTD, 0.2 parts of sulfur; Total 248.7 copies.
3. Tire reclaimed rubber
Tire reclaimed rubber is based on waste tires as the main raw material, through crushing, desulfurization, refining and other processes to complete, low price, good processing performance, and chlorobutyl rubber, natural rubber combined with the production of tire innerliner E4LYY1011 rubber can not only reduce the cost of raw materials, but also improve the processing performance of rubber compound, reduce production energy consumption. It is recommended to choose ultra-fine tire reclaimed rubber for tire innerliner rubber, which has high fineness and no impurities, which is more beneficial to the air tightness of innerliner rubber.
60 parts of chlorobutyl rubber, 20 parts of natural rubber, 20 parts of tire reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 0.5 parts of magnesium oxide, 65 parts of carbon black N660, 12 parts of naphthenic oil, 3.5 parts of alkyl phenolic resin, 1.15 parts of accelerator DM, 0.2 parts of accelerator TMTM, 0.65 parts of vulcanizing agent Vultac5; Total 189 copies.
In actual production, when mixing reclaimed rubber into the tire innerliner rubber produced with chlorobutyl rubber as the main raw material to reduce costs, it is necessary to select the appropriate reclaimed rubber varieties according to the specific performance requirements of the inner liners, reasonably determine the proportion of reclaimed rubber mixture, appropriately adjust the formula, reduce the production cost of tire innerliner rubber, and improve the processing performance of rubber and the performance of finished products. In the future, Xiaobian will continue to share with you the key points and precautions of the production process of chlorobutyl rubber and reclaimed rubber to produce tire innerliner rubber.
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