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 inorganic antimicrobial mapulasitiki (siliva, mkuwa, nthaka okusayidi), mankhwalawa ali mofulumira antimicrobial liwiro ndi zabwino inhibitory zotsatira pa bowa ndi kachilombo.