Tire reclaimed rubber recycling waste tire recycling resources, not only to solve the problem of environmental pollution of waste tires, but also greatly ease the shortage of rubber resources in China is the largest amount of reclaimed rubber. Rubber products companies in the choice of reclaimed rubber tire, its commonly used indicators are particularly concerned about, because of its performance is directly related to the performance of rubber products.
1, moisture: When the water exceeds the indicator, the product prone to foaming in the vulcanization process, resulting in defective products. Second, the moisture on the rubber compounding agent dispersion uniformity also has a certain influence, easy to make powdered with agents such as clumps.
2, ash: Ash Mainly refers to renewable rubber in inorganic fillers and metal impurities. The higher the ash content, the less organic matter such as rubber and hydrocarbon, the quality of reclaimed rubber is poor, otherwise the opposite.
3, acetone extract: acetone extract refers to the rubber soluble in acetone material. In reclaimed rubber, the total amount of substances that can be extracted by acetone is called acetone extract. When the amount of extraction is too high, it easily causes the sticking roller of the rubber mixing process, resulting in difficult operation and pollution of some rubber products.
4, Tensile strength: the maximum tensile stress until the specimen is broken is the tensile strength of the reclaimed rubber product, is the ability to resist the root of tensile damage, the tensile strength of each rubber product is Different, so not to say that the higher the tensile strength the better or the lower the better, and the closest rubber needs is the best.
5, Elongation: With the tensile strength, only with high tensile strength, to ensure that the deformation process is not damaged, will have a higher elongation. Generally with the set stress and hardness increases, the tensile elongation of recycled rubber decreased; resilience, permanent deformation is small, the elongation at break. Tensile elongation is the most relevant is the amount of waste of raw materials containing plastic, general latex rubber reclamation elongation will be relatively high.
6, Mooney viscosity: Mooney viscosity is a measure of the rubber average molecular weight and plasticity of an indicator. Mooney viscosity test is a certain temperature, time and pressure, measuring the specimen shear resistance generated by the rotation of the rotor to the size of the torque to indicate the size of rubber plasticity. Mooney viscosity is too high if not easy to process; Mooney viscosity is too low vulcanized products after the tensile strength is low, the performance may not meet the requirements. Reasonable control of the reclaimed rubber product Mooney viscosity value is conducive to the reclaimed rubber mixing, rolling, extrusion, injection and molding vulcanization and other processing.
7, Shore Hardness: Hardness is a physical measure of the degree of deformation or anti-piercing ability of a material, indicating that it is capable of resisting external force and is commonly measured by Shore Hardness Tester. Reclaimed rubber hardness range generally about 60-65, unit Shaw A, the level of recycled rubber hardness can affect the wear resistance of recycled rubber products.
Latex reclaimed rubber, EPDM reclaimed rubber, butyl reclaimed rubber, nitrile reclaimed rubber commonly used test indicators In addition to the above test indicators, but also focus on the detection of indicators, such as latex reclaimed rubber need to test the rubber content of hydrocarbons, ternary EPR to its high temperature resistance, anti-aging properties to be tested, butyl rubber reclaimed airtight, watertight and nitrile rubber reclaimed rubber oil testing, in addition, including tire reclaimed rubber, including all Recycled plastic commonly used indicators of detection of mechanical performance testing, salt spray test, corrosion resistance testing, combustion performance testing, flame test, pulse test, electrical conductivity, volatile, tensile strength, thermal stability, shear stability Sex, curing curve, Mooney scorch time.
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