XPS okpomọkụ mkpuchi mbadamba na-ike extruding polystyrene okpomọkụ mkpuchi, isi ihe onwunwe bụ polystyrene, na a na-percent nke nwekwara (ọkụ retardant, agba mastetbatch, talcum powder), nke a na-extruding site kpo oku n'okpuru ike àgwà akara, na elu arụmọrụ ike na-asụ ụfụfụ plastik na n'ụgbụgbọ mmanụ aṅụ na-emechi cell Ọdịdị na-akpọ adiabatic extruding polystyrene asụ ụfụfụ plastic, ọ bụ obere aha XPS.
