Polypropylene yog non-toxic, tsw, thiab tasteless milky dawb siab crystallinepolymer nrog ib tug melting point ntawm 164 ~ 170 ° C, ib tug ceev ntawm 0.90-0.91g / cm2, thiab ib tug molecular hnyav li ntawm 80,000 mus rau 150,000. Nws yog ib qho lightest ntawm tag nrho cov yas ntau yam tam sim no. Nws yog qhov tshwj xeeb ruaj khov rau dej, thiab nws qhov nqus dej hauv dej rau 24 teev tsuas yog 0.01% 6.
