Polyvinyl alcohol (PVA) yog ib qhov polymer tsim los uas paub tshaj rau kev raug rhuav nrog dej thiab kev tsim film zoo tshaj. Nws tseem ceeb hauv kev lag luam nyiaj ruaj nrog rau kev them kom nyiaj ruaj muaj zog thiab nyob dai dua thaum tsim khoom. PVA kuj tseem pab hauv kev tsim cov films uas raug rhuav nrog dej, muab kev xa khoom tshaj tawv uas phem tsis tau. Hauv kev lag luam kho mob thiab kev saib xyuas neeg, PVA tseem pab nrog kev sib ntxiv rau hauv cov duos thiab khoom siv hauv tsev.