Polyurethane xim yog dav siv thaum txheej txheej yuav tsum tau muab ntau tshaj qhov yooj yim kho kom zoo nkauj. Nws kev sib xyaw ua ke ntawm cov khoom siv dag zog, kev ua haujlwm tsis zoo, tshuaj tiv thaiv, adhesion thiab tsos ua rau nws haum rau cov khoom siv, steel qauv, engineering tsheb, machinery, pem teb thiab sab nraum zoov Cheebtsam. Txawm li cas los xij, cov xim polyurethane tsis haum rau txhua daim ntawv thov, thiab nws qhov kev ua tau zoo nyob ntawm qhov raug tsim thiab daim ntawv thov.
Dab tsi yog qhov zoo ntawm Polyurethane xim?
Ib qho txiaj ntsig tseem ceeb yog kev ua haujlwm kho tshuab. Ib txheej txheej polyurethane kho tau zoo tuaj yeem tsim cov yeeb yaj kiab tawv thiab tawv uas tiv thaiv kev sib txhuam rov qab thiab cuam tshuam me ntsis. Qhov no ua rau nws tsim nyog rau kev lag luam hauv pem teb, tshuab, khoom siv hauv tsheb thiab cov khoom siv raug rau kev tuav tsis tu ncua lossis puas.
Polyurethane coatings kuj tseem tuaj yeem muab kev tiv thaiv zoo rau dej, roj thiab ntau yam tshuaj lom neeg. Los ntawm kev tsim kom muaj kev tiv thaiv kev tiv thaiv ntawm lub substrate thiab ib puag ncig ib puag ncig, cov txheej txheem tuaj yeem pab txo qhov deterioration thiab corrosion. Ntawm cov qauv hlau npaj tau zoo thiab cov khoom siv hauv tsev, polyurethane topcoats feem ntau yog siv los ua ib feem ntawm cov txheej txheem txheej txheej txheej txheej txheej txheej.
Lwm qhov zoo dua yog kho kom zoo nkauj yooj. Polyurethane xim tuaj yeem tsim nyob rau hauv ntau hom xim thiab gloss, nrog rau siab -gloss, semi-gloss thiab matte tiav. Nws tuaj yeem muab qhov chaw du thiab zoo ib yam uas ob qho tib si kev tiv thaiv thiab zoo li tseem ceeb.
Xaiv cov tshuab polyurethane kuj muaj cov huab cua tsis zoo. Aliphatic polyurethane txheej tuaj yeem muab kev txhim kho kev tiv thaiv rau ultraviolet raug, xim hloov thiab gloss poob piv nrog cov pa roj tsw qab. Lawv yog li tsim nyog rau ntau yam khoom siv sab nraum zoov, engineering machinery thiab kev siv tsheb thauj mus los.
Dab tsi yog qhov tsis zoo ntawm Polyurethane xim?
Daim ntawv thov tuaj yeem xav tau ntau dua nrog ntau cov paib ib zaug - cov xim pleev xim. Ob -cov khoom siv polyurethane feem ntau xav tau cov resin thiab curing tus neeg sawv cev sib xyaw ntawm qhov sib piv. Kev sib xyaw tsis raug tuaj yeem ua rau kev kho tsis tiav, txo cov tshuab ua haujlwm lossis cov tshuaj tsis zoo.
Lub neej lauj kaub yog lwm qhov kev txwv. Tom qab ob qhov sib xyaw ua ke, cov txheej txheem feem ntau yuav tsum tau siv rau hauv lub sijhawm teev tseg. Yog tias nws tseem tsis tau siv ntev dhau lawm, nws cov viscosity thiab kev kho tus cwj pwm tuaj yeem hloov pauv, muaj feem cuam tshuam rau daim ntawv thov thiab txheej txheej kawg.
Ib puag ncig tej yam kev mob kuj tseem ceeb. Qhov kub, av noo thiab qhov chaw saum npoo tuaj yeem cuam tshuam rau kev kho thiab adhesion. Cov av noo siab tuaj yeem tsim teeb meem rau cov dej noo- cov tshuab rhiab heev, thaum qhov kev npaj tsis txaus tuaj yeem ua rau blistering, tev lossis txheej txheej ntxov ntxov.
Cov tshuaj hnyav ib txwm siv- cov xim polyurethane tuaj yeem muaj cov tshuaj tsis haum tshuaj organic, lossis VOCs, thiab cov tshuaj tua kab mob xws li isocyanates. Yog li, kev ua pa kom tsim nyog, cov cuab yeej tiv thaiv tus kheej thiab kev tswj chaw ua haujlwm yuav tsum tau ua. Dej-raws li polyurethane coatings tuaj yeem muab qis dua -emissions rau qee yam kev siv, txawm hais tias lawv cov kev ua tau zoo thiab kev ua haujlwm yuav tsum tau ntsuas kom zoo.
Yellowing tuaj yeem ua rau muaj kev txhawj xeeb nrog cov pa roj tsw qab polyurethane tshuab raug rau lub sijhawm ntev UV hluav taws xob. Qhov no tshwj xeeb tshaj yog pom ntawm cov xim dawb, lub teeb -xim lossis pob tshab. Thaum lub sij hawm ntev - xim ruaj khov yog qhov tseem ceeb, aliphatic polyurethane feem ntau yog qhov kev xaiv tsim nyog.