纳米尼龙6注塑熔接线拉伸性能的研究

Study on the Weld Line Strength of Injection Molded Nylon 6 Nanocomposites

针对纳米尼龙6,研究了熔体温度、模具温度、保压压力和注射速度等工艺因素对具有熔接线和无熔接线注塑件拉伸强度的影响.研究表明:具有熔接线纳米尼龙6注塑件的拉伸强度明显低于纯尼龙6和无熔接线纳米尼龙6注塑件的拉伸强度.随着熔体温度、模具温度、保压压力和注射速度的增大,纳米尼龙6注塑件的拉伸强度都随之提高;在所选择的工艺因素中,保压压力对注塑件熔接线拉伸强度影响最大.

In this study, molding condition including melt temperature, mold temperature, packing pressure and injection speed on the mechanical properties particularly the weld line strength of injection molded nylon 6 nanocomposites were investigated. It is found that with addition of nano particles the weld line becomes significantly weak compared with that of pure nylon 6 parts and non-weld line nylon 6 nanocomposites. As melt temperature, mold temperature, packing pressure and injection speed increase the weld line stren nanocomposites also increase. Among the processing factors, packing pressure exhibits the m effect on weld line strength.