UPVC, feem ntau yog hu ua PVC, yog muaj los ntawm Vinyl Chloride Monomer ntxiv rau qee yam ntxiv. Lub teeb yuag thiab tuaj yeem tiv taus kev ntxias tau li 75 degrees. Corrosion - Cov khoom siv rawistant muaj cov yam ntxwv tsis yooj yim, yog li nws yog qhov ua kom dej ntws tawm, yog li nws tau ua kom dej ntws tawm hauv av, thiab lwm yam.
