Polypropylene (PP) dunƙule iyakoki ne abin dogara kuma m hatimi na'urar tsara musamman don daban-daban marufi aikace-aikace. An yi shi da wani abu mai ɗorewa na polypropylene, waɗannan murfi suna ba da hatimi mai ƙarfi da juriya na sinadarai, yana tabbatar da amincin ruwa ko sinadarai.