Ngwa ya dị iche iche site na ihe nkiri ndị a na-eme ihe nkiri na ihe nkiri lamination ruo na nkwakọ ngwaahịa nri, ihe mkpuchi twist, na ihe nkiri nkwakọ ngwaahịa ákwà, gụnyere ihe nkiri label siri ike karịa, ihe nkiri kwụ ọtọ, na ije ozi dị ka ihe mkpuchi isi na ihe nkiri co-extrusion.