Classification ntawm Polyethylene
Classification ntawm polyethylene
Polyethylene muab faib ua high density polyethylene (HDPE), low density polyethylene (LDPE) thiab linear low density polyethylene (LLDPE) raws li txoj kev polymerization, molecular hnyav thiab saw qauv.
LDPE
Khoom: saj tsis qab, tsis muaj ntxhiab, tsis muaj tshuaj lom, npub saum npoo, milky dawb waxy hais, ntom txog 0.920 g / cm3, melting point 130 ℃ ~ 145 ℃. Insoluble nyob rau hauv dej, me ntsis soluble nyob rau hauv hydrocarbons, thiab lwm yam. Nws muaj peev xwm tiv taus qhov yaig ntawm feem ntau cov acids thiab alkalis, muaj dej nqus dej tsawg, tseem tuaj yeem tswj tau yooj yim ntawm qhov kub thiab txias, thiab muaj hluav taws xob rwb thaiv tsev siab.
Txheej Txheem Feem Ntau:
Feem ntau muaj ob hom kev kub siab raj txoj kev thiab txoj kev kettle. Yuav kom txo tau cov tshuaj tiv thaiv kub thiab siab, tubular txheej txheem generally txais yuav qhov kub-kub siab ua haujlwm pib pib lub tshuab polymerization, high-purity ethylene yog siv los ua cov khoom siv tseem ceeb, propylene, propane, thiab lwm yam. Lub polymerization tau ua nyob rau hauv cov xwm txheej ntawm 330 ° C thiab 150-300MPa. Lub molten polymer uas pib polymerization nyob rau hauv lub reactor yuav tsum tau txias thiab sib cais ntawm kev kub siab, nruab nrab siab thiab tsis tshua muaj siab. Tom qab kev sib cais, nws raug xa mus rau lub inlet ntawm lub siab-siab (30 MPa) compressor, thaum uas tsis tshua muaj siab circulating gas yog txias thiab sib cais thiab xa mus rau lub low-pressure (0.5 MPa) compressor rau recycling, thaum lub molten polyethylene. yog xa mus rau lub granulator tom qab kev sib cais ntawm high-pressure thiab low-pressure. Rau granulation hauv dej, thaum lub sij hawm granulation, cov lag luam tuaj yeem ntxiv cov khoom tsim nyog raws li cov ntawv thov sib txawv, thiab cov granules tau ntim thiab xa tawm.
siv:
Cov txheej txheem xws li kev txhaj tshuaj molding, extrusion molding, thiab tshuab moulding tuaj yeem siv tau. Feem ntau siv los ua agricultural zaj duab xis, industrial ntim zaj duab xis, tshuaj thiab zaub mov ntim zaj duab xis, cov khoom siv kho tshuab, cov khoom siv niaj hnub, cov khoom siv hauv tsev, hlau, cable rwb thaiv tsev, txheej thiab ntawv hluavtaws.
LLDPE
Cov Khoom: Vim tias cov qauv molecular ntawm LLDPE thiab LDPE yog qhov sib txawv, cov khoom kuj txawv. Piv nrog LDPE, LLDPE muaj qhov zoo ntawm ib puag ncig kev ntxhov siab tawg thiab hluav taws xob rwb thaiv tsev, siab dua kub ua haujlwm, cuam tshuam tsis kam thiab puncture tsis kam.
Txheej Txheem Feem Ntau:
LLDPE resin feem ntau yog tsim los ntawm cov khoom siv polyethylene puv ntom ntom, thiab cov txheej txheem tsim khoom yog cov txheej txheem Innovene thiab UCC's Unipol txheej txheem.
siv:
Los ntawm kev txhaj tshuaj molding, extrusion, tshuab moulding thiab lwm txoj kev molding, kev tsim cov yeeb yaj kiab, cov khoom siv niaj hnub, cov kav dej, xov hlau thiab cables, thiab lwm yam.
HDPE
Khoom: Natural, cylindrical los yog oblate hais, du hais, particle loj yuav tsum yog 2 hli ~ 5 hli nyob rau hauv tej kev taw qhia, tsis muaj mechanical impurities, thermoplastic. Cov hmoov yog hmoov dawb, thiab cov khoom tsim nyog tau tso cai kom muaj xim daj me ntsis xim. Nws yog insoluble nyob rau hauv ntau cov kuab tshuaj nyob rau hauv lub chav tsev kub, tab sis yuav swell nyob rau hauv aliphatic hydrocarbons, aromatic hydrocarbons thiab halogenated hydrocarbons thaum hu rau ib tug ntev lub sij hawm, thiab yog me ntsis soluble nyob rau hauv toluene thiab acetic acid ntawm kub siab tshaj 70 ° C. Oxidation tshwm sim thaum cua sov hauv huab cua thiab nyob rau hauv lub hnub ci. Resistant rau feem ntau cov kua qaub thiab alkali yaig. Nws muaj qhov nqus dej tsawg, tseem tuaj yeem tswj tau yooj yim ntawm qhov kub thiab txias, thiab muaj hluav taws xob rwb thaiv tsev siab.
Txheej Txheem Feem Ntau:
Ob txoj kev tsim khoom tau txais yuav: txoj kev roj theem thiab txoj kev slurry.
siv:
Siv kev txhaj tshuaj molding, tshuab moulding, extrusion molding, rotomolding thiab lwm txoj kev molding los tsim cov khoom siv yeeb yaj kiab, cov khoom siv niaj hnub thiab kev lag luam siv ntau qhov ntau thiab tsawg ntawm hollow ntim, kav, calendering tapes thiab khi tapes rau ntim, ropes, nuv ntses nets thiab braided fibers, Hlau thiab cable thiab lwm yam.
Classification ntawm Polyethylene