Polyvinyl chloride (PVC) cov kav dej tau dhau los ua lub hauv paus ntawm cov txheej txheem niaj hnub, kev tsim kho, thiab cov kav dej, muaj nuj nqis rau lawv cov kav ntev, pheej yig, thiab ntau yam. Qhov zoo ntawm cov kav dej no feem ntau txiav txim siab los ntawm hom PVC resin siv hauv lawv cov khoom tsim.
Nyob rau hauv phau ntawv qhia no, peb yuav delve rau hauv lub ntiaj teb no ntawm PVC resins, tshawb txog cov ntsiab lus tseem ceeb los txiav txim siab thaum xaiv cov resin zoo tshaj plaws rau cov yeeb nkab zoo.
Cov yam ntxwv cuam tshuam rau kev xaiv PVC resin
Xaiv txoj cai PVC resin rau cov yeeb nkab ntau lawm yuav tsum tau ua tib zoo xav txog ntau yam, suav nrog:
Molecular Luj: Qhov hnyav molecular ntawm PVC resin plays lub luag haujlwm tseem ceeb hauv kev txiav txim siab cov yeeb nkab cuam tshuam lub zog, nruj, thiab kev ua haujlwm tag nrho. Siab dua molecular hnyav resins feem ntau ua rau cov kav dej nrog txhim khu kev cuam tshuam thiab rigidity.
Melt Flow Index (MFI): MFI qhia txog cov resin flowability thaum lub sij hawm extrusion txheej txheem. Ib qho tsim nyog MFI ua kom du extrusion, zoo li cov yeeb nkab qhov ntev, thiab txo kev ua haujlwm tsis zoo.
Vicat Softening Temperature (Vicat B): Vicat B sawv cev rau qhov kub thiab txias uas cov resin pib soften nyob rau hauv load. Qhov siab dua Vicat B tus nqi qhia tau zoo dua cov cua sov thiab qhov ruaj khov ntawm cov kav dej.
Additives: PVC resins feem ntau tsim nrog cov additives los txhim kho lawv cov khoom thiab ua cov yam ntxwv. Cov additives feem ntau muaj xws li stabilizers, fillers, lubricants, thiab tej yam hloov pauv.
Hom PVC Resin rau Yeeb Nkab Ntau Lawm
Raws li cov lus hais saum toj no, PVC resins rau cov yeeb nkab ntau lawm tuaj yeem muab faib ua ob hom loj:
Suspension PVC (S-PVC): S-PVC resins yog tsim los siv cov txheej txheem ncua kev kawm ntawv polymerization, uas ua rau cov khoom sib txuas nrog qhov dav ntawm qhov hnyav molecular. Lawv muaj qhov sib npaug zoo ntawm kev cuam tshuam lub zog, nruj, thiab cov yam ntxwv ua haujlwm.
Emulsion PVC (E-PVC): E-PVC resins yog tsim los ntawm cov txheej txheem emulsion polymerization, yielding finer particles nrog ib tug nqaim molecular hnyav tis. Lawv feem ntau pom muaj kev cuam tshuam ntau zog thiab qis qis dua piv rau S-PVC resins.
Xaiv qhov zoo tshaj plaws cob rau koj xav tau
Kev xaiv ntawm PVC resin zoo tshaj plaws rau cov yeeb nkab tsim yog nyob ntawm daim ntawv thov tshwj xeeb thiab cov yeeb nkab uas xav tau. Piv txwv li, cov kav dej npaj rau kev siv siab xav tau cov resins nrog qhov hnyav molecular thiab Vicat B qhov tseem ceeb los xyuas kom muaj lub zog txaus thiab kub ua haujlwm.
Hauv qhov sib piv, cov kav dej rau cov ntawv siv tsis muaj zog, xws li cov dej ntws los yog dej, tuaj yeem ua rau muaj kev cuam tshuam rau lub zog thiab yooj yim ntawm kev ua, ua E-PVC resins yog qhov kev xaiv tsim nyog.
Xaus
Kev xaiv PVC cob yog ib qho tseem ceeb ntawm kev tsim cov kav dej PVC zoo. Los ntawm kev nkag siab txog cov ntsiab lus tseem ceeb cuam tshuam rau kev xaiv resin thiab cov khoom ntawm cov khoom sib txawv, cov neeg tsim cov yeeb nkab tuaj yeem txiav txim siab paub qhov zoo ntawm cov yeeb nkab kev ua tau zoo thiab ua tau raws li qhov xav tau ntawm ntau hom kev siv.
Nco ntsoov tias kev sab laj nrog cov neeg siv khoom paub txog PVC cob thiab nrhiav kev cob qhia yuav ua rau muaj txiaj ntsig zoo hauv kev xaiv cov khoom zoo tshaj plaws rau koj cov kev xav tau tshwj xeeb ntawm cov yeeb nkab.
Post lub sij hawm: Jul-02-2024