Kev tsim cov polyvinyl chloride (pvc) tawv yog ib cov txheej txheem nyuaj uas xav tau siab siab nrog cov khoom siv. PVC yog dav siv thermoplastic paub rau nws cov versatility, tab sis nws yog inherently tsis ruaj khov ntawm kev siv cov stabilizers, yuav tsum siv cov chwj khov kho. Cov poov tshuaj-zinc stabilizers tau tshwm sim raws li kev hloov tshiab tseem ceeb hauv daim teb no, muab ntau qhov zoo tshaj li cov lis dej num cubilizers. Cov cabilizers no tshwj xeeb tshaj yog muaj txiaj ntsig zoo nyob rau hauv pvc dag tawv kev lag luam vim lawv cov nyiaj kub siab dua thiab cov txiaj ntsig ib puag ncig.
Cov yam ntxwv thiab cov khoom ntawm potassium-zinc stabilizers
Cov poov tshuaj-zinc stabilizers, tseem hu ua K-Zn Stabilizers, yog lub stabassium thiab zinc sib xyaw tsim los txhim kho lub thermal stability ntawm pvc. Cov cabilizers zoo hloov cov cuab yeej ua txhuas, uas tau tshwm sim ntau rau kev txhawj xeeb ib puag ncig thiab kev noj qab haus huv. Cov khoom tseem ceeb ntawm cov poov tshuaj-zinc stabilizers suav nrog kev ruaj khov kho tshav kub muaj xws li kev ruaj khov, txhim kho cov qauv hloov pauv, thiab txhim kho kev sib haum xeeb nrog ntau hom picters.
* Thermal stability:Cov poov tshuaj-zinc stabilizers yog ua tau zoo ntawm kev tiv thaiv kev tawm tsam ntawm PVC ntawm ntug dej kub. Thaum lub sij hawm ua ntawm pvc dag tawv, cov khoom yog raug rau kev ua kom sov, uas tuaj yeem ua rau lub cev ua kom tawg, thiab kev tso tawm ntawm hydrochloric acid (hcl). Cov poov tshuaj-zinc medilizers pab tswj kev ncaj ncees ntawm lub tshuab ua ke
* Transparency thiab xim tuav:Cov cabilizers no ua rau muaj kev tsim cov khoom ntshiab thiab ci PVC. Lawv tiv thaiv kev yellowing thiab lwm yam kev sib cav, ua kom muaj cov khoom lag luam tawv kawg ua kom muaj kev thov kom zoo nkauj. Qhov no yog qhov tshwj xeeb tshaj nyob rau hauv kev zam thiab kev lag luam muag khoom lag luam, qhov twg cov tsos ntawm hluavtaws tawv yog ib qho tseem ceeb ntawm qhov tseem ceeb.
* Kev nyab xeeb ib puag ncig:Ib qho ntawm qhov tseem ceeb ntawm cov poov tshuaj-zinc stabilizers yog lawv txoj kev ua phooj ywg ib puag ncig. Tsis zoo li cov thawj coj stabilizers, potassium-zinc stabilizers tsis tso cov tshuaj lom lom neeg thaum lub sijhawm ua haujlwm lossis pov tseg. Qhov no ua rau lawv muaj kev nyab xeeb rau cov neeg tsim khoom lag luam thiab cov neeg siv khoom kawg, ua raws li qhov xav tau loj thiab tsis muaj tshuaj lom hauv kev lag luam ntau yam.
Txoj kev thov
Kev sib xyaw ua ke ntawm cov poov tshuaj-zinc stabilizers rau hauv PVC cov qauv muaj ntau cov kauj ruam, feem ntau tshwm sim thaum lub sijhawm sib txuas. Cov cabilizers no tuaj yeem koom nrog ntau txoj kev, suav nrog kev sib xyaw ua kom qhuav, extrusion, thiab txhaj tshuaj moulding.
1.dry blending:Thaum qhuav sib xyaw, poov tshuaj-zinc stabilizers yog sib xyaw nrog PVC Resin thiab lwm cov kev sib ntxiv hauv cov khoom sib ntxiv hauv cov tshuab ceev. Cov sib tov no yog tom qab ntawd raug rau qhov kub thiab shear rog kom ntseeg tau tias qhov kev faib tawm ntawm cov stabilizers thoob plaws hauv PVC lub matrix. Tus txheej txheem no yog qhov tseem ceeb rau kev ua tiav kev ruaj khov nyob thoob plaws txhua pob ntawm cov khoom siv PVC.
2. Extrusion:Thaum lub sij hawm extrusion, uas qhuav-xyaw pvc compended yog pub rau tus extruder, qhov chaw nws tau melted thiab homogenized. Cov chivilizers kom ntseeg tau tias cov pvc cov khoom tseem ruaj khov thiab tsis degrade nyob rau hauv lub siab kub thiab pressures koom nrog kev zam txim. Lub extruded pvc yog ces tsim rau hauv cov ntawv txheeb lossis cov yeeb yaj kiab, uas yog tom qab siv hauv kev tsim cov tawv dag.
3. Txhaj Tshuaj Pwm:Rau cov ntawv thov yuav tsum tau cov duab ntxaws thiab cov qauv tsim, txhaj tshuaj moulding yog ua haujlwm. Lub pvc sib txuas, muaj poov tshuaj-zinc stabilizers, tau txhaj rau hauv cov pwm kab noj hniav uas nws txias thiab solidifies mus rau qhov xav tau. Lub stabilizers ua si lub luag haujlwm tseem ceeb hauv kev tswj cov thermal stability thaum kev tiv thaiv tsis xws luag nyob rau hauv cov khoom kawg.
Vim li cas potassium-zinc stabilizers yog hu ua "Kickers"
Lo lus "Kicker" hauv cov ntsiab lus ntawm poov tshuaj-zinc stabilizers keeb kwm los ntawm lawv lub peev xwm los ua kom nrawm dua cov txheej txheem gelation ntawm pvc plastisols thaum cua sov. Hauv kev tsim ntawm pvc dag tawv, ua tiav qhov xav tau gelation thiab fusion ntawm pvc plastisol yog qhov tseem ceeb. Cov poov tshuaj-zinc-zinc stabilizers ua raws li kev txo qis kev ua kom lub zog ua kom muaj zog rau kev ua kom pom kev, tag nrho cov txheej txheem. Qhov kev nrawm nrawm tau txais txiaj ntsig vim tias nws ua rau cov txheej txheem ntau lawm thiab ntau cov txheej txheem tsim khoom lag luam.
Qhov Zoo thiab Kev Ua Haujlwm
Cov poov tshuaj-zinc meurilizers muaj ob peb kev ua tau zoo hauv pvc formificial tawv lawm. Cov no suav nrog:
* Txhim kho thermal stability:Cov cabilizers no muab cov phom sij kub ua kom zoo nkauj rau cov khoom siv ua ke ua ke rau cov khoom siv ua ke ua ke, kom siv cov khoom siv no tuaj yeem tiv xwm ua kom kub siab yam tsis muaj kev ntxhov siab. Qhov no yog qhov tshwj xeeb tshaj plaws hauv tawv tawv tawv, qhov twg PVC cov ntawv thiab cov yeeb yaj kiab tau raug ua kom cua sov thaum lub sijhawm ua haujlwm xws li embossing thiab laminating.
* Txhim kho cov khoom lag luam zoo:Los ntawm kev tiv thaiv kev ua tsis taus thiab tshem tawm, poov tshuaj-zinc meurilizers pab tsim cov tawv PVC dag nrog tsawg dua. Qhov no ua rau muaj cov khoom lag luam zoo ib yam thiab txhim khu kev qha, uas yog qhov tseem ceeb rau kev sib ntsib cov qauv kev lag luam thiab cov neeg siv khoom cia siab.
* Kev ua raws ib puag ncig:Kev siv cov potassium-zinc stabilizers ua ke nrog kev ua kom nce thiab cov neeg siv khoom siv rau ib puag ncig cov ntaub ntawv. Cov cabilizers no tsis tso cov tshuaj muaj teeb meem, ua cov txheej txheem tsim khoom nyab xeeb thiab muaj kev nyab xeeb dua.
* Ua hauj lwm zoo:Kev siv cov potassium-zinc meurilizers tuaj yeem txhim kho kev ua haujlwm los ntawm kev txo qhov kev tsis xws luag cov ntses ntses, cov kua txiv, thiab dub specks. Qhov no ua rau cov qoob loo ntau dua thiab cov nqi ntau lawm, ua rau muaj kev lag luam tag nrho ntawm kev tsim khoom.
Daim ntawv thov ntawm poov tshuaj-zinc stabilizers hauv pvc dag kev lag luam pov tseg sawv cev rau cov kev nce qib tseem ceeb hauv cov khoom ruaj khov thev naus laus zis. Cov stabilizers muab txoj kev nyab xeeb rau lub zog thermal, uas yuav tsum muaj rau kev tsim cov khoom lag luam tawv tsiaj zoo. Raws li kev lag luam txuas ntxiv mus ua ntej kom ua ntej kev ceev thiab kev nyab xeeb, potassium-zinc stabilizers tau ua si qhov tseem ceeb tshaj plaws hauv lub neej tom ntej ntawm pvc cuav manufacturing.
Lub Sijhawm Post: Jun-25-2024