Qhov sib txawv tseem ceeb ntawm HDPE LDPE thiab LLDPE yog tias HDPE muaj qhov qis ntawm cov saw ntev ntev hauv nws cov qauv tshuaj thiab LDPE muaj qhov sib piv ntau ntawm cov saw ntev ntev uas LLDPE muaj ntau ntau ntawm cov saw hlau luv luv hauv nws cov qauv tshuaj.
Lub sij hawm HDPE stands rau high density polyethylene thiab lo lus LDPE stands rau low density polyethylene thaum lo lus LLDPE stands rau linear low density polyethylene.
YHDPE yog dab tsi?
Lub sij hawm HDPE sawv cev rau siab ntom ntom polyethylene. HDPE yog qhov siab ntom ntom polyethylene, cov khoom siv polymer uas ua los ntawm polymerization ntawm ethylene monomers. Nws yog cov khoom siv thermoplastic (ua moldable ntawm qhov kub thiab txias thiab solidify thaum txias). Cov khoom no muaj qhov sib piv siab ntawm lub zog thiab qhov ntom ntawm cov khoom siv polymer. Yog li ntawd, nws yog siv nyob rau hauv zus tau tej cov yas fwj, kav, thiab lwm yam. Qhov ceev ntawm cov khoom no polyethylene yog 0.93 txog 0.97 g / cm3.
Daim duab 01: HDPE
Qhov zoo ntawm kev siv HDPE dua lwm cov polymers suav nrog cov nqi-zoo, muaj peev xwm tiv taus qhov kub thiab txias, tsis muaj leaching zog, tiv thaiv UV hluav taws xob, tiv thaiv ntau yam tshuaj thiab nruj. Muaj qee qhov tsis zoo thiab. Qhov tsis zoo muaj xws li huab cua tsis zoo, flammability, rhiab heev rau kev ntxhov siab tawg, thiab lwm yam.
HDPE cov khoom siv tau zoo hauv kev tsim cov raj mis yas, cov khoom ua si, cov thawv tshuaj, cov kav dej, cov hnab yas, snowboards, roj tank hauv tsheb, thiab lwm yam.
LDPE yog dab tsi?
Lo lus LDPE sawv cev rau cov polyethylene tsawg. Nws yog cov khoom siv thermoplastic. Lub monomer ntawm cov khoom siv polymer no yog ethylene. LDPE tau tsim thawj zaug hauv xyoo 1933 los ntawm Imperial Chemical Industries siv cov txheej txheem ntawm kev kub siab dawb radical polymerization. Qhov no yog txoj kev tsim khoom ntau tshaj plaws rau LDPE txawm tias niaj hnub no.
Qhov ntom ntawm LDPE yog nyob nruab nrab ntawm 917 txog 930 Kg / m3. Cov khoom no tsis ua haujlwm ntawm chav tsev kub thaum tsis muaj oxidizers muaj zog thiab qee cov kuab tshuaj (uas tuaj yeem ua rau cov khoom o). LDPE yog qhov hloov tau yooj yim thiab tawv heev. Cov tsos ntawm LDPE feem ntau yog translucent lossis opaque.
LLDPE yog dab tsi?
Lo lus LLDPE sawv cev rau linear low density polyethylene. Nws yog ib tug linear polymer nrog luv-chain branching, thiab peb tsim nws ntawm copolymerization ntawm ethylene nrog olefins muaj chains ntev. Peb yuav tsum siv qhov kub thiab txias qis thaum lub sijhawm tsim khoom no. Cov khoom kawg ntawm cov txheej txheem no muab qhov nqaim molecular hnyav faib. Tsis tas li ntawd, cov catalyst peb siv rau cov txheej txheem tsim khoom no yog Ziegler catalyst.
Daim duab 02: Ceg Polymer
Peb tuaj yeem ua cov polymerization nyob rau theem kev daws teeb meem lossis theem roj. Ntxiv mus, thaum xav txog nws cov khoom, LLDPE muaj lub zog tensile siab, muaj kev cuam tshuam siab thiab puncture tsis kam thaum piv rau LDPE. Ntxiv mus, cov khoom no yog hloov tau yooj yim heev. Nws tuaj yeem ncua kev ntxhov siab.
Qhov txawv ntawm HDPE LDPE thiab LLDPE yog dab tsi?
Lub sij hawm HDPE sawv rau qib siab polyethylene thiab lub sij hawm Ldpe sawv ntsug ntawm cov lus LLDPE sawv ntsug rau linear tsawg polyethylene. Qhov sib txawv tseem ceeb ntawm HDPE LDPE thiab LLDPE yog tias HDPE muaj qhov tsawg ntawm cov saw ntev ntev hauv nws cov qauv tshuaj, thiab LDPE muaj qhov sib piv ntau ntawm cov saw ntev ntev, qhov LLDPE muaj ntau ntau ntawm cov saw hlau luv hauv. nws cov qauv tshuaj.
Cov infographic hauv qab no nthuav tawm qhov sib txawv ntawm HDPE LDPE thiab LLDPE hauv daim ntawv teev npe.
Summary – HDPE vs LDPE vs LLDPE
Lub sij hawm HDPE sawv cev rau siab ntom ntom polyethylene. Thiab lo lus LDPE stands rau tsawg ntom polyethylene. Meanwhile, lo lus LLDPE stands rau linear low density polyethylene. Qhov sib txawv tseem ceeb ntawm HDPE LDPE thiab LLDPE yog tias HDPE muaj qhov tsawg ntawm cov saw ntev ntev hauv nws cov qauv tshuaj, thiab LDPE muaj qhov sib piv ntau ntawm cov saw ntev ntev, qhov LLDPE muaj ntau ntau ntawm cov saw luv luv hauv nws cov qauv tshuaj..
