The bottom sink material is relatively complex, including PE, PP, ABS, PS, PA, etc., and it is difficult to use. The first thing to solve is mixing and dispersion. To solve this problem, we chose the co-rotating parallel twin-screw extruder to solve the problem of mixing and dispersing; the other is the fusion problem of various materials. I added a small metering feeder, and a certain amount of compatibilizer and Toughening agent; design special equipment, one-step co-rotating parallel twin-screw one-step extrusion molding equipment, which really solves the problem that the bottom material is difficult to use.