Polypropylene (PP) thiabpolyethylene (PE)ob leeg yog cov tsev neeg thermoplastic. Nyob ntawm qib, lawv tuaj yeem yaj thiab hloov kho ntau zaus. Polypropylene yog ib qho polyolefin, uas txhais tau hais tias nws yog tsim los ntawm kev rov ua dua ntawm cov propylene. Polyethylene, ntawm qhov tod tes, tseem yog polyolefin, tuaj yeem tsim los ntawm ntau hom monomers, feem ntau yog ethylene.
Ntawm ob, polypropylene tuaj yeem tiv taus qhov kub thiab txias. Nws yog nruj dua thiab muaj cov ntsiab lus melting ntau dua li polyethylene. Tsis tas li ntawd, polypropylene yog siv nyob rau hauv ntim khoom noj, raws li nws yog cov zaub mov tsis muaj kev ruaj ntseg thiab noo noo-resistant. Polypropylene pom nws txoj hauv kev rau hauv ntim, ntaub pua plag, hlua, thiab cov khoom yas.
Polyethylene yog dav siv nyob rau hauv ntim thiab vim nws muaj zog heev thiab ruaj khov. Qhov no suav nrog kev ntim khoom noj. Lwm qhov chaw pom cov polyethylene yog cable thiab hlau rwb thaiv tsev, cov khoom ua si, thoob, thiab hnab khoom noj.
Zuag qhia tag nrho, PP feem ntau yog qhov kev xaiv zoo dua rau cov ntawv thov uas muaj zog, ua haujlwm ntev, ua haujlwm kub, thiab tshuaj tiv thaiv yog qhov tseem ceeb. PE yuav zoo dua rau cov ntawv thov thaum hloov pauv, nqi, thiab kev cuam tshuam ib puag ncig.
