• Ma polystyrene granules amasakanizidwa ndi thovu kenako amatuluka pansi pa kutentha kwakukulu ndi kupanikizika pogwiritsa ntchito extruder.
• Pambuyo pa extrusion, chisakanizocho chimakhazikika mofulumira ndikuwumbidwa kuti apange pepala lopitirira.
• Kayendedwe kake: Kutentha kwapamwamba-kumapangitsa kuti mamolekyu azikhala ophatikizika komanso ma pores otsekedwa kwathunthu.
