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   When TPR material is used for extruding, there is one factor should be noted:
  1. Suggested L/D ratio:26-28
PROBLEM PROBABLE CAUSES CORRECTION
PROBLEM
SHAPE		 Abnormal extruding prouss.
‧ Reduce temperature of extruding mold
‧ Reduce extruding speed.
‧ Increase back pressure
‧ Use a screw with metering section or longer infeed section.
ROUGH
SURFACE
‧Too low melt temperature.
‧Uneven blending of melt.
‧Heater is damaged.
‧Poor mold design.
‧In crease temperature on nozzle and barrel.
‧Increase temperature of melt
‧Increase injection temperature
‧Increase screw speed and back pressure.
‧Increase mold temperature