PVC yog cov khoom siv yas, nws lub npe tag nrho yog polyvinyl chloride. Nws qhov zoo yog tus nqi qis, lub neej ntev, moldability zoo thiab kev ua haujlwm zoo heev. Muaj peev xwm tiv taus ntau yam corrosions hauv qhov chaw sib txawv. Qhov no tso cai rau nws siv dav hauv kev tsim kho, kho mob, tsheb, xaim thiab cable thiab lwm yam. Txij li cov khoom siv tseem ceeb los ntawm cov roj av, nws yuav muaj kev cuam tshuam tsis zoo rau ib puag ncig. Cov nqi ua thiab rov ua dua tshiab ntawm cov ntaub ntawv PVC yog qhov siab thiab nyuaj rau rov ua dua.
Cov khoom siv PU yog cov ntawv luv ntawm cov khoom siv polyurethane, uas yog cov khoom siv hluavtaws. Piv nrog cov khoom siv PVC, cov khoom siv PU muaj qhov zoo. Ua ntej tshaj plaws, cov khoom siv PU yog softer thiab xis dua. Nws kuj yog ntau elastic, uas yuav ua rau kom kev nplij siab thiab kev pab lub neej. Thib ob, PU cov ntaub ntawv muaj qhov du, tsis muaj dej, roj pov thawj thiab kav ntev. Thiab nws tsis yooj yim rau khawb, tawg lossis deform. Tsis tas li ntawd, nws yog ib qho khoom siv zoo ib puag ncig thiab tuaj yeem rov siv dua. Qhov no muaj kev tiv thaiv zoo rau ib puag ncig thiab ecology. Cov khoom siv PU muaj qhov zoo dua li cov khoom siv PVC hauv cov ntsiab lus ntawm kev nplij siab, dej tsis zoo, ua haujlwm ntev thiab kev noj qab haus huv ib puag ncig.