Differences in recipe requirements

As the single-screw extruder and twin-screw extruder material flow state is different from the material in the screw shear force experienced by the plasticizing time and course are different, so the PVC system formulation requirements are
Different. The shearing force of the material in the twin-screw extruder is far greater than the shearing force in the single-screw extruder, and the internal lubrication of the PVC system is more demanding. However, in the twin-screw extruder material plasticization time is short, the plasticization process is short, the thermal stability of the PVC system requires no single-screw extruder plasticizing a long time, the stability of the heat stabilizer requires a long time. In addition, the twin-screw extruder plasticization ability, material plasticization uniformity are far greater than the single-screw extruder, twin-screw extruder extrusion quality than single-screw extruder is higher, mainly in the material Tensile strength, impact strength and strength on the weld. Specific performance in the single-screw extruder PVC profiles used in the formulation of heat stabilizer, processing aids, modifiers than the twin-screw extruder PVC profile used in the formula to be more.