PVC cov ntaub ntawv yog cov khoom siv hluavtaws uas tau muab cais ua cov polymers hauv paus. Raws li cov khoom siv raw, cov tshuaj chlorine yog siv li ntawm 57%, nrog rau cov roj hauv qhov nyiaj ntawm 43%.
Kev piav qhia dav dav
Polyvinyl chloride yog hais txog cov khoom siv hluavtaws thermoplastic. Nyob ntawm seb cov txheej txheem polymerization yog dab tsi, ib yam khoom raug tsim uas yuav muaj cov tshuaj sib txawv thiab lub cev sib txawv. PVC-raws li cov ntaub ntawv tuaj yeem ua tau yas thiab tsis yog yas. Nyob rau hauv tsos, polyvinyl chloride yog cov hmoov dawb uas tsis muaj ntxhiab thiab tsis qab. Nws muaj zog heev, muaj cov yam ntxwv zoo heev dielectric, thiab tseem insoluble hauv dej. PVC cov ntaub ntawv yog resistant rau cawv, alkalis, ntxhia roj. Lawv yaj hauv ethers, ua ntej o. Ketones, aromatics, thiab chlorinated hydrocarbons tuaj yeem ua cov kuab tshuaj. Cov ntaub ntawv piav qhia yog resistant rau oxidation thiab yuav luag tsis-flammable. Nws muaj qhov tsis kam, tsis muaj cua sov, thiab thaum raug kub ntawm 100 degrees, nws decomposes, pib tso tawm hydrogen chloride. Txhawm rau kom ua tiav cov dej solubility zoo dua thiab ua kom sov dua, PVC raug rauCov tshuaj chlorination.
Lub cev thiab tshuaj lom neeg yam ntxwv
Molecular hnyav txawv ntawm 40,000 txog 145,000. Cov khoom ignites spontaneously ntawm qhov kub thiab txias uas yog sib npaug rau 1100 degrees. Thaum lub ignition kub yog 500 degrees. Lub flash tshwm sim ntawm 624 degrees. Qhov ceev yog nyob rau hauv thaj tsam ntawm 1.34 grams ib cubic centimeter. Qhov ntom ntom ntawm qhov sib txawv ntawm 0.4 mus rau 0.7 grams ib cubic centimeter. PVC cov ntaub ntawv pib decompose ntawm 100-140 degrees. Kev hloov iav tshwm sim ntawm 70-80 degrees.
Kev ua haujlwm ib puag ncig
Polyvinyl chloride yog ib yam tshuaj lom me ntsis, thiab cov khoom tawg tuaj yeem ua rau mob ntawm lub ntsws sab saud ntawm tib neeg. Cov plua plav uas tau tso tseg yog hluav taws kub. Yog hais tias cov khoom yog rhuab los ntawm ntau tshaj 150 degrees, ces kev puas tsuaj ntawm lub polymer pib, uas yog nrog los ntawm kev tso tawm ntawm hydrogen chloride, raws li zoo raws li carbon monoxide. Cov txheej txheem no muaj kev phom sij rau tib neeg lub cev.
PVC cov ntaub ntawv tuaj yeem siv tau ntev ntawm qhov kub siab tshaj ntawm 60 degrees. Cov yas yas muaj peev xwm ua kom txias mus rau -60 degrees.
Production Features
Yog tias koj txaus siab rau lo lus nug ntawm cov khoom siv PVC yog dab tsi, ces koj yuav tsum paub koj tus kheej nrog cov cuab yeej tsim khoom. Lub rooj ntsev thaum lub sij hawm electrolysis decomposes rau hauv hydrogen, chlorine thiab caustic soda. Yav dhau los, thawj cov khoom dissolves nyob rau hauv dej, thiab decomposition tshwm sim nyob rau hauv tus ntawm tus nqi hluav taws xob. Ethylene yog tsim los ntawm cov roj los yog roj los ntawm cov txheej txheem hu ua cracking. Cov kauj ruam tom ntej yog kev sib xyaw ntawm chlorine thiab acetylene. Cov khoom kawg yog ethylene dichloride, uas yog siv los tsim cov yas chloride monomer. Nws yog cov khoom tom kawg uas ua raws li lub hauv paus hauv kev tsim cov PVC. Thaum lub sij hawm polymerization, cov molecules ntawm vinyl chloride monomer tau ua ke, vim li ntawd, nws muaj peev xwm tau txais cov granulate. Nws kuj yog cov khoom siv raw, thiab ntau yam tshuaj ntxiv rau nws txhawm rau ua tiav ntau yam khoom siv.
YPVC khoom
Ua txhua yam khoom los ntawm cov khoom siv PVC niaj hnub no yog qhov yooj yim heev. Ntau yam thev naus laus zis tau siv rau qhov no, ntawm lawv yog dov, txhaj tshuaj molding, thiab extrusion. Suspension PVC, piv txwv li, yog siv los tsim cov khoom muag muag, nruj thiab ib nrab mos, nrog rau cov yas yas. Emulsion PVC tsim lub hauv paus ntawm cov khoom muag.
siv thaj chaw
PVC-coated cov ntaub ntawv raws li polyvinyl chloride tau pom nws txoj hauv kev rau kev siv kho mob niaj hnub no. Lub zog rau kev siv loj hauv cheeb tsam no yog qhov yuav tsum tau hloov iav thiab roj hmab nrog cov khoom siv pov tseg thiab rov siv tau kom tsis muaj menyuam. Yog liSij hawm dhau mus, polyvinyl chloride tau dhau los ua ntau dua vim nws inertness thiab tshuaj stability. Cov khoom kho mob ua los ntawm PVC tuaj yeem siv tau txawm tias nyob hauv tib neeg lub cev, lawv tsis tawg, lawv yooj yim kom tsis muaj menyuam thiab tsis txhob xau.
Polyvinyl chloride yog dav siv los ua cov khoom siv rau kev tsim tsheb. Nyob rau hauv cheeb tsam no, nws yog suav tias yog qhov thib ob feem ntau polymer tom qab polypropylene. Hauv kev lag luam automotive, nws yog siv rau kev tsim cov khoom sealing, coatings, cable rwb thaiv tsev, armrests, ntsuas qhov rooj, sab hauv trim thiab lwm yam. Qhov ntom ntawm cov khoom siv PVC thiab nws lwm yam ntxwv tau teev tseg saum toj no ua rau nws muaj peev xwm ua kom lub neej ntev ntawm lub tsheb. Niaj hnub no, lub sijhawm lav yog 17 xyoo, thaum rov qab rau xyoo pua xya ntawm lub xyoo pua xeem, daim duab no tsis ntau tshaj 11 xyoo.
Daim ntawv thov hauv cheeb tsam no tau ua rau nws ua tau kom txo tau cov nqi roj. Qhov no yog vim qhov tseeb tias cov polymer hnyav dua, thaum lub tsheb zoo tsis txo qis. Polyvinyl chloride tau txhim kho kev nyab xeeb ntawm tsheb. Nws yog siv rau hauv kev tsim cov vaj huam sib luag tiv thaiv, airbags thiab lwm yam. Qhov hluav taws kub ntawm cov khoom siv kuj txhim kho kev nyab xeeb ntawm lub tsheb.
Yog tias koj tab tom xav txog yam khoom siv PVC, koj kuj yuav tsum paub tias nws tau siv los tsim lub hom phiaj. Qhov no yog vim qhov tseeb tias los ntawm nws koj tuaj yeem tsim cov khoom ntawm txhua yam.
siv kev tsim kho
Yog peb xav txogTag nrho cov polymers, nws yog PVC uas yog siv dav hauv kev tsim kho. Raws li cov yam ntxwv tseem ceeb uas muaj nuj nqis nyob rau hauv kev lag luam no, ib qho tuaj yeem tawm qhov hnav tsis kam, tsis muaj qhov hnyav, txhua yam muaj zog, tsis kam tiv thaiv corrosion thiab lwm yam txheej txheem, nrog rau qhov kub thiab txias thiab huab cua cuam tshuam. PVC tuaj yeem hu ua cov khoom siv refractory zoo heev uas nyuaj rau ignite. Yog vim li ntawd nws thiaj li siv tau ntawm cov chaw uas muaj kev nyab xeeb tshwj xeeb rau hluav taws.
Zoo kawg
Yog tias koj txiav txim siab siv PVC rau tus kheej lub hom phiaj, cov khoom twg zoo dua li nws, nws yog qhov tseem ceeb rau kev txiav txim siab ua ntej yuav khoom. Txawm li cas los xij, nws tsim nyog sau cia tias polyvinyl chloride tau pom dav dav hauv ntau qhov chaw rau ntau yam laj thawj. Lawv feem ntau tau piav qhia hauv kab lus.
