#Industry News
HDPE Pipe Extrusion
Micro-Processes Related to The Air Gap
HDPE used in pipes is a crystalline polymer, which contains 60–80% crystallinity. Processing is carried out at around 200°C, when all the crystalline structures are transformed into an undefined structure as the material exits the die. Extruded plastics often have a higher melt viscosity, which allows the extrudate to retain the shape imparted to it by the die.
The air gap is a critical area where the extrudate is between the extrusion die and the entry to the sizer, in which the extruded is seen for the first time by the operator.
