Cov Hom Yas Uas Feem Ntau Siv Hauv Kev Ntim Khoom Thiab Lawv Ua Li Cas
Yas tau dhau los ua ib feem tseem ceeb ntawm peb lub neej txhua hnub, tshwj xeeb tshaj yog hauv kev lag luam ntim khoom. Cov hom yas siv rau kev ntim khoom muaj ntau yam sib txawv, txhua tus muaj nws tus yam ntxwv thiab kev siv. Tsab xov xwm no yuav tham txog ntau hom yas uas feem ntau siv rau hauv kev ntim khoom thiab lawv raug tsim li cas.
1. Polyethylene Terephthalate (PET)
Cov yam ntxwv thiab kev siv
PET yog hom yas uas feem ntau siv rau kev ntim dej haus, xws li lub raj mis dej thiab lub raj mis dej qab zib, thiab kuj siv rau hauv kev ntim khoom noj. PET nrov vim nws tsis hnyav, muaj zog, pob tshab, thiab tiv taus dej noo thiab roj, yog li ntawd nws thiaj li tseem tshiab.
Cov kev ua
Kev tsim cov PET pib nrog kev sib xyaw ua ke ntawm ethylene glycol thiab terephthalic acid, uas tsim cov polymer los ntawm cov txheej txheem hu ua polycondensation. Thaum cov polymer tau tsim, cov khoom siv raug cua sov thiab yaj, tom qab ntawd tsim rau hauv preform los ntawm kev txhaj tshuaj molding. Cov preform no tom qab ntawd rov ua kom sov thiab tshuab rau hauv pwm los ua lub raj mis lossis lwm yam ntim khoom, ib qho txheej txheem hu ua tshuab molding.
2. Cov Polyethylene Uas Muaj Zog Heev (HDPE)
Cov yam ntxwv thiab kev siv
HDPE yog ib hom yas uas muaj zog, tiv taus kev cuam tshuam, thiab tiv taus ntau yam tshuaj lom neeg. HDPE feem ntau siv los ua cov fwj mis nyuj, cov fwj tshuaj ntxuav tes, cov hnab yuav khoom, thiab txawm tias qee yam khoom ua si.
Cov kev ua
Cov txheej txheem tsim khoom HDPE suav nrog kev ua cov ethylene hauv qab qhov siab tsawg siv cov tshuaj catalyst tshwj xeeb. Thaum cov polymer tau tsim, HDPE raug yaj thiab extruded rau hauv cov ntawv, cov kav dej, lossis pellets, uas tom qab ntawd tuaj yeem ua kom zoo dua los ntawm ntau yam txheej txheem xws li tshuab molding, txhaj molding, thiab roto molding, nyob ntawm cov khoom kawg xav tau.
3. Polyvinyl Chloride (PVC)
Cov yam ntxwv thiab kev siv
PVC yog ib hom yas uas siv tau ntau yam, los ntawm cov yas tawv mus rau cov yas uas yoog tau. Cov yas PVC uas yoog tau feem ntau siv los ua cov yas zaj duab xis, cov ntawv, thiab cov pob yas blister, thaum cov yas tawv siv los ua lub raj mis thiab qee hom yeeb nkab.
Cov kev ua
PVC yog ua los ntawm kev sib xyaw ua ke ntawm vinyl chloride monomer (VCM). Cov tshuaj tiv thaiv no feem ntau yog ua tiav hauv cov reactors loj hauv qab qhov siab thiab qhov kub tshwj xeeb. Cov khoom PVC kawg yog hmoov lossis pellet, uas tom qab ntawd tuaj yeem yaj thiab tsim ua ntau yam khoom los ntawm cov txheej txheem xws li extrusion, calendaring, lossis txhaj tshuaj molding.
4. Polyethylene Uas Muaj Qhov Ceev Tsawg (LDPE)
Cov yam ntxwv thiab kev siv
LDPE paub txog nws qhov kev ywj pheej, tiv taus dej noo, thiab yooj yim ua. LDPE feem ntau siv los ua cov hnab yas, cov khoom ntim khoom yooj ywm, thiab cov txheej txheej rau cov khoom xws li cov khoom qhwv zaub mov.
Cov kev ua
LDPE yog ua los ntawm kev polymerization ntawm ethylene nyob rau hauv siab siab thiab kub, siv lub free radical initiator. Cov khoom yog ib tug resin uas yuav yaj thiab tsim rau hauv ntau yam duab los ntawm cov txheej txheem xws li extrusion tshuab molding thiab cast film extrusion.
5. Polypropylene (PP)
Cov yam ntxwv thiab kev siv
Polypropylene yog ib hom yas uas tiv taus cua sov, tshuaj lom neeg, thiab qaug zog. PP siv rau hauv cov khoom ntim khoom noj, tshwj xeeb tshaj yog rau cov khoom uas xav tau cua sov, xws li lub tshuab cua sov microwave, thiab kuj siv los ua lub hau fwj, cov pas nrig, thiab ntau hom thawv.
Cov kev ua
Kev tsim cov polypropylene suav nrog kev polymerization ntawm propene nyob rau hauv qhov siab qis thiab kub siv Ziegler-Natta catalyst lossis metallocene catalyst. Thaum cov polymer tau tsim, cov khoom siv raug yaj thiab extruded rau hauv pellets, uas tom qab ntawd tuaj yeem ua tiav ntxiv siv cov txheej txheem xws li kev txhaj tshuaj molding, extrusion, thiab blow molding los tsim cov khoom kawg.
6. Polystyrene (PS)
Cov yam ntxwv thiab kev siv
Polystyrene yog ib hom yas uas tawv, pob tshab, thiab yooj yim ua. Nws feem ntau siv los ua cov khob haus dej pov tseg, cov thawv ntim khoom noj, cov tais nqaij, thiab cov khoom siv rwb thaiv tsev xws li Styrofoam.
Cov kev ua
Polystyrene yog ua los ntawm kev polymerization ntawm styrene monomer. Cov txheej txheem tuaj yeem yog bulk polymerization lossis suspension polymerization, uas styrene yog yaj thiab polymerized nrog kev pab los ntawm tus neeg pib dawb radical. Cov khoom kawg yog pellets lossis daim ntawv uas tom qab ntawd tuaj yeem tsim ntxiv rau hauv ntau yam khoom los ntawm cov txheej txheem xws li kev txhaj tshuaj molding, extrusion, lossis thermoforming.
7. Polymethyl Methacrylate (PMMA)
Cov yam ntxwv thiab kev siv
Polymethyl Methacrylate, tseem hu ua acrylic lossis Plexiglas, yog ib hom yas pob tshab uas paub txog nws qhov meej thiab tiv taus huab cua. PMMA feem ntau yog siv rau kev ntim khoom uas xav tau kev nthuav qhia zoo, xws li cov thawv tso saib thiab cov ntim khoom zoo.
Cov kev ua
PMMA yog ua los ntawm kev polymerization ntawm methyl methacrylate. Cov txheej txheem no suav nrog tus pib xws li peroxide los pib cov tshuaj tiv thaiv polymerization saw. Cov PMMA uas tsim tau ces yaj thiab extruded lossis molded rau hauv cov duab xav tau.
Xaus
Yas tau coj ntau yam txiaj ntsig rau kev lag luam ntim khoom, los ntawm kev tiv thaiv cov khoom zoo heev mus rau qhov yooj yim ntawm kev ua thiab rov ua dua tshiab. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum xav txog qhov cuam tshuam rau ib puag ncig ntawm kev siv yas. Kev rov ua dua tshiab thiab rov siv dua yog cov kev daws teeb meem los txo qhov cuam tshuam tsis zoo ntawm cov khib nyiab yas.
Kev nkag siab txog ntau hom yas thiab lawv ua li cas tsis yog tsuas yog muab kev nkag siab txog cov txheej txheem kev lag luam xwb tab sis kuj pab peb txiav txim siab zoo dua txog kev siv cov khoom no, ob qho tib si hauv tsev thiab hauv kev lag luam. Cia peb txuas ntxiv tsim kho tshiab thiab ua haujlwm ua ke kom peb lub ntiaj teb huv si thiab noj qab haus huv!
