The solid tire carcass is solid and does not require inner tubes, inner liners and cord skeletons. It is mainly used for high-load vehicles or machinery running at low speeds, mainly including tread rubber and carcass rubber. Natural rubber has high mechanical strength and good elasticity. It is an ideal material for making solid tires. However, in actual production, natural rubber is relatively expensive, has poor aging resistance, and is prone to vulcanization reversion during vulcanization. What measures can be taken to solve these problems ? What problems should be paid attention to during use?
1. Basic physical requirements of solid tires
The durability and safety of solid tires are better than that of pneumatic tires. They are mainly used in special vehicles in the fields of construction vehicles, forestry machinery, construction machinery, etc., and are used under high load conditions. Therefore, the compound is required to have excellent wear resistance, pressure resistance, high tensile stress and hardness, and low compression and permanent deformation. When using natural rubber to produce solid tires, reasonably adjusting the rubber product formula or mixing other types of rubber in an appropriate amount can further optimize the overall performance of the product and better coordinate the relationship among quality and cost.
2. Reference formula for solid tire carcass rubber produced by natural rubber
100 parts of natural rubber, 2 parts of stearic acid, 40 parts of zinc oxide, 2 parts of antioxidant A, 2 parts of lead oxide, 60 parts of high abrasion furnace black, 3 parts of solid coumarone, 0.5 parts of accelerator M, 4 parts of sulfur Servings; Total: 213.5 Servings.
3. Natural rubber and styrene butadiene rubber are used together to produce solid tires
In actual production, natural rubber can be used in combination with styrene butadiene rubber in an appropriate ratio to prepare large-scale solid tire tread rubber and carcass rubber to further improve the abrasion resistance, heat resistance and aging resistance of solid tires. When producing solid tires with natural rubber/styrene-butadiene rubber 2YLYY127, sulfur vulcanization is generally used; high wear-resistant carbon black is used for reinforcement, and spray carbon black can be used if necessary; pine tar and solid coumarone are recommended for the softening system. The processing performance of the rubber material can improve the mechanical strength of the finished product.
4. Combined use of natural rubber/styrene-butadiene rubber/tire reclaimed rubber to produce solid tires
When producing solid tires with natural rubber/styrene-butadiene rubber as raw materials, rubber product manufacturers can also add appropriate amounts of reclaimed tire rubber to the formula, especially small solid tire carcass rubber. The main components of tire reclaimed rubber are natural rubber, general synthetic rubber (mainly styrene butadiene rubber and butadiene rubber) and carbon black. It has good compatibility with natural rubber and styrene butadiene rubber, and can be used in any ratio with the two. Effectively reduce the production cost of solid tires.
In actual production, the amount of reclaimed tire rubber in solid tires is generally determined according to the performance requirements of the finished product and the physical properties of the reclaimed rubber. For every 100 parts of natural rubber/styrene butadiene rubber combined rubber, the maximum amount of reclaimed tire rubber can be mixed with about 300 parts. , While reducing the cost, improving the vulcanization performance of the rubber compound and the aging resistance of the finished product. Appropriate adjustment of the solid tire formula containing reclaimed rubber, such as increasing the amount of reinforcing carbon black appropriately, can further improve the comprehensive indicators of the finished product and extend the service life while reducing the cost.
In the production of solid tires, natural rubber can be used alone or in combination with styrene butadiene rubber, or a large amount of reclaimed tire rubber can be blended to further reduce the cost of raw materials while improving the performance of solid tires. When natural rubber and styrene-butadiene rubber, or natural rubber/styrene-butadiene rubber/tire reclaimed rubber are used to produce solid tires, rubber tire manufacturers must comprehensively consider the processing performance of various rubbers, and appropriately adjust the rubber mixing process and vulcanization process to improve Product quality and production efficiency, avoid unnecessary losses.
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