weld wire;  Nano nylon 6;  Tensile strength

For nano-nylon 6, the effects of process factors such as melt temperature, mold temperature, holding pressure and injection speed on the tensile strength of molded parts with welded and non-welded lines were studied. The results show that the tensile strength of weld-wired nano-nylon 6-injection molded parts is significantly lower than that of pure nylon 6 and weld-free nano-nylon 6-injection molded parts. With the increase of melt temperature, mold temperature, holding pressure and injection speed, the tensile strength of nano-nylon 6 injection molded parts increases. Among the selected process factors, the holding pressure has the greatest influence on the tensile strength of the weld line of the injection molded parts.