Iveliswe kwaye iqhutywe kusetyenziswa izinto ezikumgangatho ophezulu kunye nefuthe eliphezulu lokuxhathisa iPP, ene-asidi kunye ne-alkali eNganyangekiyo kumabala e-oyile, ayinayo ityhefu kwaye ayinavumba, kwaye ngokuhambelana neemfuno zokusingqongileyo. ℃℃.