Some manifestations, causes and solutions of plasticizing defects on Lab plastic extruders

Manifestations of plasticizing defects on lab plastic extruder：
1.The surfact of plastic have “Toad skin”appearance; 
2.The plastic surface in black color with microcracks and poorly plasticized particles; 
3.Poor suture of glue joint with a visible trace.

Reason of plasticizing defects on lab plastic extruder
1.The Temperture controlled too low or improper temperature.
2.Some hardly plasticized resin particles mixed in the plastics.
3.Improper operation method,the screws and the hauling speed are too fast, the plastics are not fully plasticized.

4.The materials are not mixed uniformly or they are in bad quality.

Solutions of plasticizing defects on lab plastic extruder
1.Control the temperation in proper range according to the process requirements.
2.Reduce the screw and hauling speed,Increase plasticizing and heating time to improve the effect of plasticizing.
3.Using screw cooling water to strengthen the plasticization and density of plastics;

4.Selecting Dies in smaller die sleeves,Strengthen the pressure of the outlet.

Hartek Lab Plastic Extruder-Lab Twin Screw Extrusion Line Provide Perfect Solutions on Lab Testing.