LDPE: daim ntawv thov

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LDPE: daim ntawv thov
LDPE: daim ntawv thov

Video: LDPE: daim ntawv thov

Video: LDPE: daim ntawv thov
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Anonim

LDPE yog tsim los ntawm purified ethylene, thiab triethylaluminium thiab titanium tetrachloride ua raws li organometallic catalyst.

low-pressure polyethylene
low-pressure polyethylene

Kom tau txais polyethylene hauv kev lag luam hauv tsev, ntau txoj kev siv thev naus laus zis tau siv, uas txawv ntawm hom qauv, lub peev xwm reactor, txoj kev ntxuav polyethylene los ntawm cov catalyst siv.

Technology

Feem ntau, peb txoj haujlwm sib law liag yog ua tiav: ethylene polymerization, txheej txheem ntawm kev ntxuav nws los ntawm cov catalyst thiab ziab kawg. Tom qab sib tov cov kev daws teeb meem ntawm triethylaluminium thiab titanium tetrachloride, cyclohexal thiab roj av ntxiv rau lawv. Rhaub mus rau 50 C, ib qho kev daws ob feem pua yog pub rau hauv lub reactor, qhov twg ethylene ntxiv los ntawm lub tshuab nqa airlift. Kev sib xyaw ua ke pab txhawb rau ib nrab polymerization ntawm ethylene rau hauv polyethylene.

Txhawm rau tshem tawm cov catalyst los ntawm cov polymer, cov khoom decomposition raug lim tawm thiab yaj. Polyethylene yog ntxuav los ntawm catalyst nyob rau hauv ib tug centrifuge siv methyl cawv.

cev odtsawg ntom polyethylene
cev odtsawg ntom polyethylene

Polyethylene tsawg-density yog nias tom qab ntxuav, thiab cov tshuaj ntxiv rau nws los txhim kho qhov zoo. Lub stabilizer, ethylene glycol thiab sodium nitrophosphate yog siv los ua kom nws, thiab siv quav ciab los ua kom nws ci dua.

Thaum kawg, cov polyethylene yog qhuav thiab granulated. LDPE muaj nyob rau hauv granular thiab hmoov daim ntawv.

LDPE kav

Siv rau kev teeb tsa roj, dej phwj thiab dej.

Cov kav dej yog tsim los siv cov txheej txheem txuas txuas ntxiv. Cov khoom siv raw rau kev tsim khoom yog polyethylene hauv granules.

lub tebchaws tsim kev lag luam siv cov kav dej zoo li no hauv yuav luag txhua lub tshuab.

HDPE kav dej tsis cuam tshuam rau cov dej zoo, vim xeb tsis tsim rau ntawm phab ntsa sab hauv thiab cov ntsev ntxhia tsis sau.

LDPE tau pom siv hauv cov kav dej phwj tuaj vim nws tiv taus cov khoom hnyav thiab kub kub.

Cov kav dej kuj tsis tawg thiab tsis poob lawv cov khoom ua haujlwm tau ntev.

siab siab polyethylene
siab siab polyethylene

Durability yog lub ntsiab zoo ntawm HDPE kav. Lawv yog cov shock-resistant, tsis rot thiab tsis xeb, tsis txhob tawg nyob rau hauv lub siab thiab tsis kub kub. Lawv lub neej ua haujlwm yog ntau xyoo lawm.

High density polyethylene yog qhov muag thiab elastic. Nws cov khoom muaj ib qho kev npaj ntawm moleculeskuj rarefied, uas feem ntau cuam tshuam nws qhov ntom. Ntau cov yeeb yaj kiab yog tsim los ntawm LDPE. Lawv yog cov zoo heev, thiab rau cov khoom ntim cov kev xaiv zoo tshaj plaws, tej zaum, nrhiav tsis tau. Nws khaws cia thiab tiv taus cov khoom zoo txawm tias qhov kub txog rau caum degrees. Cov yam ntxwv zoo ntawm xws li polyethylene tsis hloov pauv raws li kev cuam tshuam ntawm cov tshuaj. Nws tuaj yeem ntseeg tau cais cov khoom los ntawm cov dej noo thiab vapor.

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