 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 nokpuru ike àgwà akara, na elu arụmọrụ ike na-asụ ụfụfụ plastik na nụgbụgbọ mmanụ aṅụ na-emechi cell Ọdịdị na-akpọ adiabatic extruding polystyrene asụ ụfụfụ plastic, ọ bụ obere aha XPS. 