A na-emepụta ihe nkiri ahụ site na usoro nkedo, tumadi na-eji polyethylene nwere ihe dị iche iche maka ngwakọta na plasticizing na extrusion site na nkedo.Enwere ike ịhazi usoro ahụ dị ka mkpa nke ndị ahịa si dị, na gram arọ, agba, mmetụta isi ike, na ụkpụrụ ọdịdị nwere ike gbanwee., Nwere ike ahaziri ebipụta ụkpụrụ.Ngwaahịa a dabara adaba maka ubi nkwakọ ngwaahịa, na-enwe mmetụta siri ike, ike dị elu, elu elongation, nrụgide hydrostatic dị elu na ihe ngosi anụ ahụ ndị ọzọ.