Kev sib xyaw ua ke ntawm cov dej tsis zoo thiab cov khoom siv los tiv thaiv zoo muaj cov npliag zoo thiab cov xim zoo ua kom ntub dej (ua cov polyvinyl butyral resin zoo tshaj plaws rau kev ua cov xim pleev xim), ua cov koob no polyvinyl butyraldehyde Cov ntaub nplaum yog qhov tsim nyog heev raws li cov tshuab luam ntawv luam ntawv, yog tias tsim kom raug, tus number case tsis muaj xim thiab tsis qhuav.