The masterbatch amapangidwa kudzera kulumikiza organic antimicrobial agent (mchere wa polyguanidine) mu mapulasitiki ndi ma polymerization ndi masitepe ambiri.Mafilimu oletsa mabakiteriya, matabwa ndi zinthu zina zapulasitiki zitha kupangidwa ndi kuwonjezera kwamkati masterbatch.Poyerekeza ndi mapulasitiki oletsa tizilombo toyambitsa matenda (siliva, mkuwa, zinc oxide), mankhwalawa ali ndi liwiro la antimicrobial komanso amalepheretsa bwino bowa ndi kachilomboka.