TWIN SCREW EXTRUSION
A 27mm or 34 mm diameter co-rotating twin screw Leistritz extruder with L/D of 40 is used for the foaming experiments. Polymer is fed into the hopper of the extruder through a solid metering feeder. The blowing agent is injected in the extruder through a syringe pump or a HPLC dual piston at 20 L/D of the extruder, after a complete melting of the material is achieved. The rest of the extruder is used to mix, pressurize, and cool the blowing agent laden melt before extruding through the die.
For more information please contact: