Which production processes are suitable for melt pumps?

The use of melt pumps is particularly effective in the extrusion of films and thin-walled profiles. This is because the use of melt pumps homogenizes the plastic melt and reduces fluctuations in the melt pressure and flow rate through the extruder, which is decisive for obtaining high-quality products, especially of uniform thickness. In particular, the production of film or ultra-thin films such as PET, PS, PP and PA and other highly oriented film is particularly sensitive to the instability of the melt pressure and flow rate, if there is too large an amplitude of pulsation or raw material contaminated by impurities or the formation of gel particles, it is easy to melt mixing and homogenization of lower quality, in fact, it is impossible to produce high-quality oriented film in the stable state of the process, and melt pumps can be solved this problem. The melt pump can solve this problem.

melt pump extrusion

Although melt pump extrusion have been widely used in plastics extrusion systems, but in the processing of plastics containing fillers or special modifiers in the application is still limited, it is the dispersion of the components, compatibility with the plastic and abrasive have strict requirements. Containing large particles, abrasive filler or reinforcing agent materials can not be equipped with melt pump extruder processing, because the contained filler particles are easy to form bolts, and the bolts can not pass through the gap between the teeth of the chemical melt pump meshing gears, and bolts of clogging and abrasive wear on the teeth of the melt pump will soon be damaged 5]. In addition, fine mineral fillers can also cause the above results, because such fillers and plastic compatibility is not good, in the high-speed shear zone can not be sheared and gradually formed in the melt pump can damage the plug.

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