In addition to the difference in how they work, they also have different application areas. The double screw extruder is widely used in the physical and chemical modification of matrix resin, such as filling, strengthening, toughening, reactive extrusion, etc. The single screw extruder is mainly used in the field of pipe, panel, sheet and profile.
1. Application examples of the double screw extruders
Application examples of the double screw extruder are as following: Reinforced glass fiber, fuel resistant granulation (such as nylon 6, nylon 66, polyester, polybutylene terephthalate, polypropylene, polycarbonate, etc.), high packing granulation (such as PE and PP with the filling of 75% CaCO3) and granulation of heat sensitive materials, such as PVC and cross-linked polyethylene cable materials), concentrated masterbatch (such as 50% filling toner), antistatic masterbatch and granulation of alloy cable materials (such as sheath and insulation material), cross-linked polyethylene pipe granulation (such as hot water cross-linked masterbatch), thermosetting plastic mixing extruder (such as phenolic resin, epoxy resin and powder coating), hot melt adhesive and polyurethane reactive extrusion granulation (such as EVA hot melt adhesive and polyurethane resin, K resin and SBS devolatilization granulation, etc.
2. Application examples of the single screw extruder
It is suitable for the manufacturing of PP-R pipe, PE gas pipe, PEX cross-linked pipe, aluminum plastic composite pipe, ABS pipe, PVC pipe, HDPE silicon core pipe and all kinds of co-extruded composite pipe. It is suitable for the extrusion of polyvinyl chloride, polyethylene terephthalate, polystyrene, polypropylene, polycarbonate and other profiles and boards, as well as the extrusion of wire, rod and other plastics. By adjusting the speed of the extruder and changing the structure of the extruder screw, it can be used to produce various plastic profiles, such as polyvinyl chloride and polyolefin.
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