Tam sim no, muaj 7 hom yas uas muaj nyob hauv peb lub neej niaj hnub, uas yog PET, HDPE, PVC, LDPE, PP, PS, thiab PC. Hauv tsab xov xwm no, kuv yuav muab cov lus qhia dav dav rau thawj peb hom.
TSIAJ
PET yog cov ntawv luv rau polyethylene terephthalate, feem ntau cov thermoplastic polymer cob ntawm polyester tsev neeg. Ib qho zoo tshaj plaws ntawm PET yog tias nws siv tau dua tshiab, rau cov ntaub polyester tuaj yeem tsim thiab rov ua dua yam tsis poob nws cov yam ntxwv tshwj xeeb. Thiab cob qhia txheeb xyuas ntawm PET yog tus lej “1”.
PET tau sau ntawv pov thawj xyoo 1941 los ntawm John Rex Whinfield, James Tennant Dickson, thiab lawv cov tswv ntiav haujlwm Calico Printers' Koom Haum ntawm Manchester, England. Txawm li cas los xij, nws yog DuPont, lub tuam txhab Asmeskas tshuaj lom neeg, uas thawj zaug siv lub cim khoom lag luam Mylar thaum Lub Rau Hli 1951 thiab tau txais kev tso npe ntawm nws xyoo 1952. Thaum pib, PET yuav luag siv nyob rau hauv cov xov hluavtaws. Nws tsis yog txog rau xyoo 1980 uas cov kws tshawb fawb hauv PET tau ua tiav qee qhov kev sib txig sib luag - cov kws tshawb fawb tau tsim cov neeg ua hauj lwm nucleating thiab crystallization-txhawb cov neeg sawv cev ua tiav. Tam sim no, PET feem ntau yog siv rau hauv cov fibers rau khaub ncaws, ntim rau kua thiab zaub mov, thermoforming rau kev tsim khoom, thiab ua ke nrog cov iav fiber rau engineering resins.
Qhov zoo
· Txhua yam khoom. PET muaj qhov muaj zog dua tensile zog, elongation, hardness thiab tsis tshua muaj kev tawg thiab tawg.
· Rho tawm rau cov roj, muaj roj, dilute acids, dilute alkali, thiab feem ntau cov kuab tshuaj.
· PET muaj qhov siv qhov kub thiab txias ntau yam, los ntawm -60 txog 130 ° C. Thiab qhov kub tsis tshua muaj kev cuam tshuam me ntawm nws cov khoom siv kho tshuab.
· PET muaj cov roj permeability tsawg (tshwj xeeb nrog carbon dioxide) nrog rau cov khoom noo noo nyob nrog.
· PET muaj cov xim zoo pob tshab, UV thaiv, thiab du thiab du nto.
· PET yog non-toxic, tasteless, huv, thiab nyab xeeb, thiab zoo meej rau kev ntim khoom noj.
HDPE
High-density polyethylene, feem ntau sau ua HDPE, yog cov ntawv ua thermoplastic polymer uas ua los ntawm cov monomer ethylene. HDPE feem ntau ua dua tshiab thiab, nrog cob qhia tus lej "2". Vim tias lub zog muaj zog-rau-qhov sib piv, nws muaj ntau cov ntawv thov suav nrog lub raj mis, khoom siv hluav taws xob, khoom siv kho mob, khoom ua si, foob pob hluav taws, ntaub thaiv, txiav cov laug cam, xov hlau, 3D tshuab luam ntawv lim, thiab cov kav dej.
Hauv lub xyoo pua 21st, qhov kev hloov pauv tau dhau los hauv kev lag luam piping engineering - uas yog "hloov cov hlau nrog plastics". Tam sim no, nrog kev txhim kho cov ntaub ntawv polymer, cov yeeb nkab yas tsis raug yuam kev li pheej yig hloov mus rau cov yeeb nkab hlau, tshwj xeeb tshaj yog cov kav dej polyethylene, uas tau siv dav hauv cov tsheb thauj roj, dej xa dej, kev ua liaj ua teb, kev xa xov thiab kev sib txuas lus, thiab lwm yam.
Vim li cas HDPE thiaj li nrov?
Ua ntej ntawm tag nrho cov, nws yog super muaj zog. Ntom yog ib qho tseem ceeb tshaj plaws rau cov plastics, thiab qhov ceev ntawm HDPE li ntawm 0.93 txog 0.97g / cm³, uas txhais tau tias nws nyuaj thiab ntau ruaj thiab tuaj yeem tuav hnyav dua. Piv txwv li, 60g HDPE lub thawv tuaj yeem ruaj ntseg hla lub taub taub dej.
Qhov thib ob, nws yog meltable thiab pwm. Cov ntsiab lus yaj ntawm HDPE yog 130.8 ° C. Thaum ncav cuag qhov ntsuas kub no, HDPE tuaj yeem yooj yim ua pwm rau qhov ze txhua yam - uas yog vim li cas nws tuaj yeem siv rau ntau thaj teb peb tau hais txog saum toj no.
Thib peb, nws yog corrosion-resistant. HDPE tsis tsuas tiv taus pwm, mildew, rotting thiab kab, tab sis kuj tiv taus feem ntau muaj zog ntxhia kua qaub thiab tshuaj muaj nyob hauv av, yog li nws yog cov khoom siv zoo rau cov kav xa dej uas siv xa dej
Thaum kawg, nws yog recyclable. HDPE tsis-biodegradable thiab yuav siv sij hawm ntau txhiab xyoo los txiav. Txawm li cas los xij, peb tuaj yeem siv HDPE yas los ua cov khoom lag luam tshiab xws li cov khoom siv rov ua dua tshiab, lub taub ntim tsis yog khoom noj, cov vuas pem teb, thiab cov thawv crates, yog li txuag nyiaj txiag, dej, nyiaj txiag, thiab thaj chaw pov tseg.
PVC
PVC txhais tau tias polyvinyl chloride, lub ntiaj teb thib peb-feem ntau tsim cov hluavtaws yas polymer. Txog 40 lab tons ntawm PVC yog tsim txhua xyoo. Tus cob qhia daim tawv yas qhia txog PVC yog tus lej “3”.
PVC tuaj yeem muab faib ua ob daim ntawv yooj yim - nruj thiab yoog raws, cov nyiaj qub rau kwv yees li 2/3 ntawm kev ua lag luam, thaum tom kawg nyiaj rau 1/3. Daim ntawv hloov pauv ntawm PVC yog mos thiab ntau yam nyob rau hauv cov tsos ntawm pob tshab rau opaque. Nws yog feem ntau siv rau saum npoo av, qab nthab, thiab tawv tawv, thiab kuj zoo rau cov kev siv hluav taws xob raws li nws yog cov rwb thaiv tsev zoo. Txawm li cas los xij, vim tias kev sib ntxiv ntawm cov yas, cov qauv hloov yooj yim ntawm PVC ua cov muag muag thiab pliable, thiab nyuaj khaws, uas ua rau muaj kev txwv ntawm nws daim ntawv thov. Daim foos ntawm PVC yog nyuaj, muaj zog, thiab nkig. Nws nquag siv rau hauv kev tsim kho rau cov kav dej thiab khib nyiab pov tseg, kev txuag vaj tse, txhaws, thaiv qhov rooj, thaiv phab ntsa thiab lub qhov rooj, thiab qhov rai thaiv. Feem ntau hais lus, daim ntawv nruj ntawm PVC yog qhov muaj txiaj ntsig ntau dua.
Pros thiab cons
Ntawm ib sab tes, PVC muaj tshuaj tiv thaiv cov kua qaub, ntsev, rog, cawv, thiab qee cov kuab tshuaj. Ntawm qhov tod tes, nws muaj lub siab hardness thiab mechanical zog. Ob qhov zoo no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau tsim thiab tsim daim ntawv thov. Dab tsi ntxiv, PVC tuaj yeem yooj yim txiav, zoo li tus, welded, thiab koom nrog ntau tus neeg ntawm cov qauv zoo li.
Txawm li cas los xij, PVC muaj cov tshuaj phom sij ntxiv nrog rau phthalates, hmoov txhuas, thiab cadmium. Tib lub sijhawm, cov kev tshawb fawb tau qhia tias PVC yuav tso tawm cov pa roj hu ua Dioxin thaum nws hlawv lossis ua kom sov, thiab nqus cov pa ntawm PVC plua plav yuav ua rau muaj kev pheej hmoo mob cancer lossis mob siab. Dhau li ntawm, PVC yog qhov nyuaj heev rau kev rov ua dua tshiab thiab yuav ntxiv cov khoom paug ib puag ncig.
