Ko nga kaata raupapa SMS he mea hanga mai i te membrane PES hydrophilic kawemai.E ratou hototahi matū ao, PH awhe 3~11.He tino pai, he taurangi teitei, he roa te ora o te ratonga, e pa ana ki te rongoa, te kai, te umanga matū, te hikohiko me etahi atu mara.I mua i te tukunga, kua wheakohia e ia kaata te 100% te whakamatautau tika, kia pai ai te tātari hua.Ka mau tonu nga kaata SMS ki te tima ipurangi tukurua, ki te whakakino mate pehanga teitei ranei.