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Silicon core pipe masterbatch developed for the problems of domestic silicon core pipe products , silicon core pipe core layer slip is not ideal , the uneven distribution of silicone additives , unstable quality , with the melt its mixed method , the development of a good compatibility and high mechanical strength, good slip ( wall friction coefficient is small ), functional silicone plastic , i.e. , a silicon core tube core mother material. This subject to the use of high density polyethylene and silicone additive , After dozens Test , adjustment aid varieties optimized formulations , developed a the ideal silicon core tube core layer masterbatch . The main conclusions are: high density polyethylene , silicone additives and processing aids, when added in an amount different from the case , there are different effects . Have synergistic effect when the addition amount of the processing aid A, B ≤ 1% or ≥ 4% , and when these two additives added in an amount higher than 1% , or less than 4% , the effect of repulsion . Experiments show that , with the timely, silicone additives and the composite processing aids preferably synergistic effect when the compound additive A / B / C / D = 1/1/2.5/2.5 when the coefficient of friction has been reduced to 0.2 less. The silicon core pipe core layer masterbatch its mixed 1:4 with the matrix resin , composite extrusion silicon core pipe processing technology to meet the requirements of the rheological , to produce a uniform distribution of solid lubricant layer of silicon core pipe wall , high strength composite flat test no stratification , no rupture , stable friction coefficient from 0.17 to 0.19 , and other performance indicators also all met the standard requirements of the silicon core pipe .
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