PP, tseem hu ua polypropylene, yog ib qho polymer ua los ntawm polypropylene ntxiv rau alkene cov tshuaj tiv thaiv, yog cov khoom siv dawb, pob tshab thiab lub teeb pom kev zoo.Cov tshuaj formula yog (C3H6) x, ntom yog 0.89-0.91g / cm3, flammable, melting point 165 ℃, softening ntawm 155 ℃, siv kub ntau yog -30 ~ 140 ℃ ...
Nyeem ntxiv