Polypropylene (PP) yog ib hom semi-crystalline thermoplastic paub txog nws cov kav ntev thiab ua haujlwm rau kev cuam tshuam. Nws kuj sawv zoo tiv thaiv ntau yam organic solvents thiab acid-base corrosion. Ib qho tseem ceeb uas yuav tsum nco ntsoov yog tias PP feem ntau tsis muaj bisphenol A (BPA), uas feem ntau pom muaj nyob hauv cov yas polycarbonate. Yog li thaum cov khoom siv polycarbonate tuaj yeem muaj BPA, koj tuaj yeem xav tias muaj kev nyab xeeb siv cov thawv noj su ua los ntawm PP.
PP yas yog non-toxic thiab ruaj khov, ua rau nws yog ib qho kev xaiv zoo rau cov khoom noj khoom haus. Nws muaj lub siab melting point thiab tsis tawg yooj yim thaum rhuab, uas yog ib tug loj ntxiv rau kev nyab xeeb. Nyob rau hauv lub neej txhua hnub, nws yog qhov zoo tshaj plaws kom tshem tawm cov ntim khoom los ntawm polyvinyl chloride (PVC) vim tias nws tuaj yeem tso cov tshuaj tsis zoo vim nws qhov tsis zoo thermal stability. Ntawm qhov tod tes, PP yas tuaj yeem ua haujlwm kub ntawm 180 thiab 240 degrees Celsius yam tsis tau poob nws qhov kev ruaj ntseg.
Txawm li cas los xij, nco ntsoov tias PP cov khoom siv yas muaj lub neej ntev. Thaum lawv tuaj yeem tiv taus qhov kub txog li 100 degrees Celsius-ua rau lawv tsim nyog rau cov ntim xws li lub raj mis thiab khob-kev siv tsis tu ncua tuaj yeem hnav lawv dhau sijhawm. Piv txwv li, cov me nyuam lub raj mis ua los ntawm PP feem ntau muaj lub neej ntev li ntawm 3 txog 5 xyoos. Tom qab lub sijhawm no, cov yas yuav nkig thiab ua rau tawg, yog li nws tseem ceeb heev los hloov lawv.
Thaum nws los txog rau lub thawv noj su ua los ntawm PP yas, koj tuaj yeem siv lawv nrog kev ntseeg siab ntev npaum li koj siv lawv kom zoo. Nco ntsoov xyuas seb puas muaj kev puas tsuaj, xws li tawg lossis tawg. Yog tias koj pom muaj teeb meem, nws yog ib lub tswv yim zoo los hloov lub thawv noj su kom koj muaj kev nyab xeeb.
Hauv cov ntsiab lus, PP yas yog qhov kev xaiv zoo rau cov thawv noj su vim nws tsis muaj BPA thiab muaj kev nyab xeeb rau kev siv khoom noj. Los ntawm kev paub txog cov kev txwv ntawm PP yas thiab ua raws li cov kev coj ua zoo tshaj plaws rau kev siv thiab hloov pauv, koj tuaj yeem txaus siab rau cov khoom no yam tsis muaj kev txhawj xeeb thaum khaws koj kev noj qab haus huv thiab kev nyab xeeb.
