CPE is chlorinated polyethylene, weather resistance, ozone resistance, aging resistance, chemical corrosion resistance, oil resistance, flame retardancy, good coloring, and strong toughness. In the rubber industry, it can be used as special rubber and nitrile rubber, butyl rubber, Ethylene-propylene rubber is used together. When using nitrile reclaimed rubber to reduce the production cost of rubber products, rubber product manufacturers can blend nitrile reclaimed rubber with an appropriate amount of CPE to further improve the overall performance of the product.
1. The significance of blending nitrile reclaimed rubber and CPE materials
CPE materials have excellent aging resistance and oil resistance. Adding a certain proportion of CPE materials to the formulation of nitrile reclaimed rubber products can further improve the aging resistance of rubber products. In actual production, as the amount of CPE increases, the various indicators of the blended compound will change. Rubber product manufacturers need to determine the amount of CPE blended according to actual needs.
2. The effect of CPE dosage on the properties of nitrile reclaimed rubber/CPE blends
When CPE is used in the formulation of nitrile reclaimed rubber products, the rubber hardness, tensile strength, elongation at break, oil resistance coefficient and aging resistance coefficient increase with the increase of the amount of CPE, and the permanent deformation and weight of the blended material 2LLYY729 The rate of change usually increases, so rubber manufacturers cannot blindly increase the amount of CPE to improve the aging resistance and oil resistance of their products.
3. Characteristics of blending process of nitrile reclaimed rubber and CPE
The processing performance of chlorinated polyethylene is good but the Mooney viscosity is too large. When the nitrile reclaimed rubber is blended with CPE, the mixed rubber has good fluidity under heating, good stiffness at room temperature, and low expansion rate during extrusion; but Compared with pure nitrile reclaimed rubber products, it has poor elasticity and higher hardness. Rubber product manufacturers need to further improve the comprehensive indicators of nitrile reclaimed rubber/CPE blend materials through formula adjustment.
4. How to design nitrile reclaimed rubber/CPE blend material formula
When nitrile reclaimed rubber is blended with CPE, reasonable adjustment of the formula can maximize the advantages and minimize the disadvantages of the two blends, and optimize the comprehensive properties of the blended materials. In actual production, the increase in the amount of CPE will increase the hardness of the blended material. Therefore, rubber product manufacturers need to appropriately increase the amount of softening plasticizer in the formula, avoid using high-strength carbon black or reduce its amount; Appropriate use of magnesium oxide or white carbon black in the system can improve the thermal stability of the blended rubber; magnesium oxide is also used as a stabilizer, and the roll temperature is controlled within the range where the CPE can form a film.
The vulcanization system directly determines the physical properties of the vulcanized rubber in the rubber product formulation. The co-vulcanization of nitrile reclaimed rubber and CPE can further improve the comprehensive performance and service life of the nitrile reclaimed rubber/CPE blend material. Rubber product manufacturers need to combine two materials The vulcanization process features reasonable selection of vulcanizing agents, accelerators, etc. The later editor will discuss with you the design skills of the vulcanization system of the nitrile reclaimed rubber/CPE blend material.
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