Butyl rubber has excellent air tightness and is an ideal raw material for the production of rubber inner tubes; However, butyl rubber has problems such as softening, hardness reduction and permanent deformation after aging, and butyl inner tubes are easy to soften, swell or burst at high speeds and high temperatures. EPDM rubber hardens after aging, which can improve the above defects and improve the performance stability of the inner tube during long-term use. In the production of butyl rubber/EPDM rubber and rubber tubes, the appropriate amount of recycled rubber can effectively reduce the cost of raw materials.
1. Which recycled rubber can be mixed into butyl rubber/EPDM rubber and used in the rubber inner tube
In the production of rubber tubes with butyl rubber and EPDM as the main raw materials to reduce the cost, it is necessary to fully consider the product price, performance indicators, compatibility with the original rubber and other issues.
When using recycled rubber to reduce the production cost of butyl rubber/EPDM rubber and rubber tubes, it is recommended to choose butyl recycled rubber or EPDM recycled rubber to replace a certain proportion of butyl raw rubber and EPDM original rubber to produce rubber tubes to reduce the cost of raw materials. Butyl recycled rubber retains the basic properties of butyl rubber, with good air tightness, heat resistance and high chemical stability. EPDM recycled rubber has the characteristics of heat resistance and aging resistance of EPDM rubber.
When choosing butyl rubber/EPDM rubber and recycled rubber for rubber tubes, it is recommended to choose butyl recycled rubber or EPDM recycled rubber with high glue content, high fineness and no impurities to ensure the stability of the rubber tube performance E5LYY321. 45% high-strength odorless butyl recycled rubber is made of high-quality waste butyl inner tube and 5% butyl raw rubber as raw material, using German far-infrared desulfurization technology, which has the characteristics of strong air tightness, heat resistance, aging resistance, high strength, good feel elasticity, environmental protection and tastelessness, etc., and can be used with butyl raw rubber to produce rubber inner tubes to reduce costs.
2. Butyl rubber/EPDM rubber mixed with recycled rubber vulcanization formula with rubber inner tube
60 parts of butyl rubber, 10 parts of EPDM rubber, 30 parts of butyl recycled rubber, 3 parts of zinc oxide, 1 part of stearic acid, 22 parts of carbon black N550, 22 parts of carbon black N774, 9 parts of naphthenic oil, 0.35 parts of accelerator M, 0.65 parts of accelerator TMTD, 1.4 parts of sulfur; Total 159.4 copies.
65 parts of butyl rubber, 10 parts of EPDM rubber, 20 parts of butyl recycled rubber, 5 parts of EPDM recycled rubber, 4 parts of zinc oxide, 1 part of stearic acid, 28 parts of carbon black N550, 28 parts of carbon black N774, 20 parts of paraffin oil, 0.4 parts of accelerator DM, 1.2 parts of accelerator TMTD, 1.3 parts of sulfur; Total 183.9 copies.
When mixing recycled rubber with butyl rubber/EPDM rubber and rubber tubes to reduce costs, rubber tube manufacturers must choose appropriate butyl recycled rubber and EPDM recycled rubber, reasonably determine the mixing ratio of recycled rubber and appropriately adjust the formula and production process parameters, and further optimize the quality of the finished product while reducing the production cost of rubber tubes. Related issues will be further discussed in the future.
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