Tire recycled rubber is processed from waste tire rubber as raw material, with the basic properties of rubber, low price, can replace some natural rubber, styrene-butadiene rubber, etc., and reduce the cost of rubber products. Rubber inner tubes are used to maintain the internal pressure of the tire, and the circular elastic tube with the tire valve is generally processed from butyl rubber or natural rubber as the main raw material, and the air tightness of the rubber material is strictly required. As a low-priced rubber raw material, can tire recycled rubber be used for rubber tube processing? What issues should I pay attention to?
1. Can tire recycled rubber produce rubber tubes?
The core requirement of rubber inner tubes for the rubber material used is air tightness, which can be maintained for a long time without air leakage under a certain pressure; The rubber is required to have good elasticity, tensile strength, tear elongation, compression set, etc. Traditional rubber inner tubes E5LYY1010 mostly made of natural rubber, and later inner tubes began to use butyl recycled rubber with excellent airtightness. Tire recycled rubber is compatible with natural rubber and general synthetic rubber well, and tire recycled rubber can be mixed with an appropriate amount in the production of rubber tubes with natural rubber as the main raw material to reduce costs.
2. Tips for selecting tire recycled rubber for rubber inner tubes
When using tire recycled rubber to reduce the production cost of rubber tubes, it is necessary to choose the appropriate index of recycled rubber according to actual needs, and the primary need is fineness. Ultra-fine tire recycled rubber is mostly processed using 80-mesh waste tire rubber powder, with high fineness, no impurities, good dispersion, and natural rubber to produce rubber inner tubes, and the finished inner tube has better air tightness, effectively avoiding problems such as pinholes and air leakage in the inner tube.
3. The rubber inner tube is mixed with the reference formula of tire recycled rubber
(1) Reference formula for the production of motorcycle inner tubes with natural rubber/tire recycled rubber: 85 parts of natural rubber, 15 parts of ultra-fine tire recycled rubber, 4 parts of zinc oxide, 2 parts of stearic acid, 1 part of paraffin, 1 part of anti-aging agent A, 1.5 parts of anti-aging agent D, 28 parts of carbon black N774, 28 parts of light calcium carbonate, 5 parts of pine tar, 0.8 parts of accelerator DM, 0.5 parts of accelerator CZ, 2.2 parts of sulfur; A total of 174 copies.
(2) Reference formula for the production of bicycle inner tubes with natural rubber/tire recycled rubber: 70 parts of natural rubber, 30 parts of ultra-fine tire recycled rubber, 5 parts of zinc oxide, 1 part of stearic acid, 0.5 parts of anti-aging agent A, 1.5 parts of anti-aging agent D, 1 part of paraffin, 12 parts of carbon black N660, 40 parts of light calcium carbonate, 2 parts of pine tar, 0.4 parts of accelerator M, 0.4 parts of accelerator DM, 0.8 parts of accelerator CZ, 2.2 parts of sulfur; A total of 166.8 copies.
When using natural rubber as the main raw material to produce rubber tubes mixed with tire recycled rubber, tube manufacturers should choose the appropriate recycled rubber according to actual needs, reasonably determine the proportion of recycled rubber, adjust the rubber formula appropriately, and reduce more raw material costs under the premise of meeting the performance needs of rubber tubes.
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