Polypropylene (PP), hom tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis muaj ntxhiab tsw ntxhiab polymer nrog crystallization siab, lub melting point ntawm 164-170 ℃, qhov ceev ntawm 0.90-0.91g / cm3, qhov hnyav molecular yog li 80,000-150,000.PP yog ib qho ntawm cov khoom siv hluav taws xob zoo tshaj plaws ntawm txhua hom tam sim no, tshwj xeeb tshaj yog ruaj khov hauv dej, nrog rau qhov nqus dej hauv dej rau 24 teev tsuas yog 0.01%.