Polypropylene, ib yam uas tsis muaj tshuaj lom, tsis muaj ntxhiab, saj tsis muaj opalescent polymer nrog siab crystallization, 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%.