Shengtong Rubber headquarters ultrahigh polyethylene sheet polyethylene sheet

Glass beads, glass fibers, mica, talc can improve the hardness, stiffness and temperature resistance; molybdenum disulfide, silicone oils and special wax can reduce the friction factor, which further enhance the self-lubricating; carbon black or metal powder can improve the resistance static and conductivity and heat resistance. However, after a slight decrease in the impact strength of the modified filler, if the content is controlled within 40%, ultra high molecular weight polyethylene (UHMW-PE) is still a very high impact strength. Peroxide crosslinking process is divided into compounding, molding and crosslinking three steps. Kneading ultrahigh molecular weight polyethylene (UHMW-PE) melt blended with the peroxide, ultra high molecular weight polyethylene (UHMW-PE) peroxide generates free radicals in the action, radical coupling and cross-linking. This step is to ensure that the temperature is not too high, so the resin is completely crosslinked. After kneading to obtain a low degree of crosslinking can continue crosslinked ultra-high molecular weight polyethylene (UHMW-PE), at a higher temperature than the kneading molded parts, then the cross-linking process. UHMWPE has excellent wear resistance, good low temperature impact resistance, self-lubricating, non-toxic, water resistance, chemical resistance, heat resistance than the general PE, disadvantage is that heat resistance (heat distortion temperature) is low, poor moldability, as general plastic outer surface hardness, rigidity, creep resistance coefficient of expansion is too large. UHMWPE poor mobility, high viscosity of the molten state, is in the form of a highly viscous rubber-like elastomer, can only be used early pressing and sintering molding, it is also available for extrusion, injection molding and blow molding processing methods.