Polyvinyl Alcohol (PVA) yog ib qho khoom siv polymer uas muaj peev xwm tsim cov yeeb yaj kiab tawv, ua tus neeg sawv cev emulsion, thiab ua haujlwm ua cov nplaum. Qhov tseem ceeb tshaj plaws, nws yog miscible hauv dej, muaj qhov siab ntawm stretch, thiab siv rau hauv kev tsim cov khaub ncaws, ntawv, thiab cov khoom siv hauv tsev. Peb muab cov khoom PVA, uas yog ntshiab, muaj qhov xav tau viscosity, thiab ua tau raws li qhov hnyav molecular ntau yam los ua haujlwm rau ntau yam kev lag luam. Raws li ib qho ntawm cov khoom lag luam tseem ceeb tshaj plaws nyob rau hauv kab no, peb lav tias cov khoom PVA uas peb muab tau ua raws li cov txheej txheem ua ntej ntawm kev ua tau zoo kom cov hom phiaj ntawm peb cov neeg siv khoom tau yooj yim ua tiav.