Abstract: Tsab xov xwm no feem ntau qhia txog cov ntsiab lus tswj hwm ntawm cov txheej txheem sib xyaw ua ke uas tsis muaj kuab tshuaj, suav nrog, kev tswj qhov kub, kev tswj cov nyiaj txheej, kev tswj qhov nruj, kev tswj siab, kev sib phim kua mem thiab kua nplaum, kev tswj cov av noo thiab nws ib puag ncig, kev ua kom kua nplaum sov ua ntej, thiab lwm yam.
Cov khoom sib xyaw ua ke uas tsis muaj kuab tshuaj tau siv ntau zuj zus, thiab yuav ua li cas siv cov txheej txheem no kom zoo yog ib qho kev txhawj xeeb rau txhua tus. Txhawm rau kom siv tau zoo ntawm cov khoom sib xyaw ua ke uas tsis muaj kuab tshuaj, tus sau ntawv pom zoo kom cov lag luam uas muaj cov xwm txheej siv ntau yam khoom siv uas tsis muaj kuab tshuaj lossis ob lub tog raj kheej nplaum, uas yog, siv ob lub tog raj kheej nplaum, ib qho muaj cov nplaum thoob ntiaj teb uas npog feem ntau ntawm cov qauv khoom, thiab lwm qhov xaiv cov nplaum ua haujlwm uas haum rau qhov chaw lossis txheej sab hauv ua cov khoom ntxiv raws li cov qauv khoom ntawm cov neeg siv khoom.
Cov txiaj ntsig ntawm kev siv lub tog raj kheej roj hmab ob chav yog: nws tuaj yeem ua rau ntau yam kev siv ntawm cov khoom sib xyaw uas tsis muaj kuab tshuaj, txo cov pa phem, muaj tus nqi qis, thiab ua haujlwm tau zoo. Thiab tsis tas yuav ntxuav lub tog raj kheej kua nplaum ntau zaus, hloov cov nplaum, thiab txo cov khib nyiab. Koj tuaj yeem xaiv cov nplaum raws li cov khoom thiab cov neeg siv khoom xav tau kom ntseeg tau tias cov khoom zoo.
Hauv cov txheej txheem ntawm kev pabcuam rau cov neeg siv khoom mus sij hawm ntev, kuv kuj tau sau qee cov ntsiab lus tswj hwm uas yuav tsum tau them sai sai kom ua tau zoo hauv cov khoom sib xyaw uas tsis muaj kuab tshuaj.
1. Huv si
Yuav kom ua tiav cov khoom sib xyaw zoo uas tsis muaj kuab tshuaj, thawj qhov yuav tsum ua yog kom huv si, uas kuj yog ib qho uas cov lag luam yooj yim tsis quav ntsej.
Cov menyuam dov ruaj khov, cov menyuam dov ntsuas, cov menyuam txheej, cov menyuam nias txheej, cov menyuam sib xyaw ua ke, lub raj qhia kev sib tov, lub thawv tseem ceeb thiab lub thawv kho ntawm lub tshuab sib tov, nrog rau ntau yam menyuam dov qhia, yuav tsum huv thiab tsis muaj cov khoom txawv teb chaws, vim tias txhua yam khoom txawv teb chaws hauv cov chaw no yuav ua rau muaj npuas thiab cov xim dawb ntawm qhov chaw ntawm cov zaj duab xis sib xyaw.
2. Kev tswj kub
Cov khoom xyaw tseem ceeb ntawm cov nplaum uas tsis muaj kuab tshuaj yog NCO, thaum tus neeg sawv cev kho yog OH. Qhov ceev, viscosity, kev ua tau zoo ntawm cov neeg sawv cev tseem ceeb thiab cov neeg sawv cev kho, nrog rau cov yam xws li lub neej ua haujlwm, kub, kub kho, thiab lub sijhawm ntawm cov nplaum, tuaj yeem cuam tshuam rau qhov zoo ntawm cov khoom sib xyaw.
Cov nplaum polyurethane uas tsis muaj kuab tshuaj muaj viscosity siab ntawm chav tsev kub vim tsis muaj cov molecule me me ntawm cov kuab tshuaj, cov zog intermolecular siab, thiab kev tsim cov hydrogen bonds. Kev ua kom sov tuaj yeem txo qhov viscosity, tab sis qhov kub siab dhau tuaj yeem ua rau gelation, tsim cov resins hnyav molecular siab, ua rau txheej nyuaj lossis tsis sib npaug. Yog li ntawd, kev tswj qhov kub ntawm txheej yog qhov tseem ceeb heev.
Feem ntau, cov neeg muag khoom nplaum yuav muab qee cov kev siv rau cov neeg siv khoom ua qhov siv, thiab qhov kub thiab txias feem ntau yog muab ua tus nqi ntau.
Qhov kub siab dua ua ntej sib tov, qhov viscosity qis dua; qhov kub siab dua tom qab sib tov, qhov viscosity siab dua.
Qhov kev hloov kho qhov kub ntawm lub menyuam ntsuas thiab lub menyuam txheej feem ntau nyob ntawm qhov viscosity ntawm cov nplaum. Qhov viscosity ntawm cov nplaum siab dua, qhov kub ntawm lub menyuam ntsuas siab dua. Qhov kub ntawm lub menyuam sib xyaw feem ntau tuaj yeem tswj tau ntawm kwv yees li 50 ± 5 ° C.
3. Kev tswj tus nqi nplaum
Raws li cov ntaub ntawv sib xyaw sib txawv, cov kua nplaum sib txawv tuaj yeem siv tau. Raws li pom hauv lub rooj, qhov kwv yees ntawm cov kua nplaum tau muab, thiab kev tswj hwm ntawm cov kua nplaum hauv kev tsim khoom feem ntau yog txiav txim siab los ntawm qhov sib txawv thiab qhov sib piv ntawm qhov ceev ntawm lub menyuam ntsuas thiab lub menyuam ruaj khov.Cov nqi thov kua nplaum
4. kev tswj siab
Vim tias lub menyuam txheej tswj cov kua nplaum uas siv los ntawm qhov sib txawv thiab qhov sib piv ntawm qhov ceev ntawm ob lub menyuam sib zog, qhov loj ntawm lub zog ntawm lub txheej yuav cuam tshuam ncaj qha rau qhov ntau ntawm cov kua nplaum uas siv. Qhov siab dua qhov siab, qhov tsawg ntawm cov kua nplaum uas siv.
5. Kev sib haum xeeb ntawm kua mem thiab kua nplaum
Feem ntau niaj hnub no, cov kua nplaum uas tsis muaj kuab tshuaj thiab cov kua mem zoo sib xws. Txawm li cas los xij, thaum cov tuam txhab hloov cov chaw tsim cov kua mem lossis cov txheej txheem nplaum, lawv tseem yuav tsum tau ua qhov kev sim sib xws.
6. Kev tswj kev nruj
Kev tswj qhov nruj yog qhov tseem ceeb heev hauv cov khoom sib xyaw uas tsis muaj kuab tshuaj vim tias nws qhov kev nplaum pib qis heev. Yog tias qhov nruj ntawm cov ntaub so ntswg pem hauv ntej thiab nraub qaum tsis sib xws, muaj qhov ua tau tias thaum lub sijhawm loj hlob, qhov kev ntswj ntawm cov ntaub so ntswg yuav txawv, ua rau pom cov npuas thiab qhov av.
Feem ntau, qhov pub zaum ob yuav tsum txo kom ntau li ntau tau, thiab rau cov zaj duab xis tuab dua, qhov nro thiab qhov kub ntawm cov menyuam sib xyaw yuav tsum tau nce ntxiv kom haum. Sim tsis txhob kom cov zaj duab xis sib xyaw nkhaus ntau li ntau tau.
7. Tswj cov av noo thiab nws ib puag ncig
Saib xyuas qhov kev hloov pauv ntawm cov av noo thiab kho qhov sib piv ntawm cov neeg sawv cev tseem ceeb thiab cov neeg sawv cev kho kom haum. Vim yog qhov ceev ceev ntawm cov khoom sib xyaw tsis muaj kuab tshuaj, yog tias cov av noo siab dhau, cov yeeb yaj kiab sib xyaw uas coated nrog kua nplaum tseem yuav kov cov av noo hauv huab cua, siv qee qhov NCO, ua rau muaj cov xwm txheej xws li kua nplaum tsis qhuav thiab tev tawv tsis zoo.
Vim yog lub tshuab laminating uas tsis muaj kuab tshuaj ceev ceev, cov khoom siv yuav tsim hluav taws xob zoo li qub, ua rau cov yeeb yaj kiab luam ntawv yooj yim nqus cov hmoov av thiab cov khoom tsis huv, cuam tshuam rau qhov zoo ntawm cov khoom. Yog li ntawd, qhov chaw ua haujlwm ntau lawm yuav tsum kaw, ua kom lub chaw ua haujlwm nyob rau hauv qhov kub thiab txias thiab av noo uas xav tau.
8. Ua kom cov kua nplaum ua ntej
Feem ntau, cov kua nplaum ua ntej nkag mus rau hauv lub tog raj kheej yuav tsum tau preheated ua ntej, thiab cov kua nplaum sib xyaw tsuas yog siv tau tom qab raug cua sov rau qee qhov kub kom ntseeg tau tias qhov hloov pauv ntawm cov kua nplaum.
9. Xaus Lus
Nyob rau theem tam sim no uas cov khoom sib xyaw ua ke uas tsis muaj kuab tshuaj thiab cov khoom sib xyaw qhuav sib koom ua ke, cov lag luam yuav tsum siv cov khoom siv thiab cov txiaj ntsig ntau tshaj plaws. Cov txheej txheem tuaj yeem yog cov khoom sib xyaw uas tsis muaj kuab tshuaj, thiab nws yuav tsis yog cov khoom sib xyaw qhuav. Npaj cov khoom tsim tawm kom zoo thiab ua tau zoo, thiab siv cov khoom siv uas twb muaj lawm kom zoo. Los ntawm kev tswj cov txheej txheem thiab tsim cov phau ntawv qhia ua haujlwm kom meej, kev poob qis ntawm kev tsim khoom tsis tsim nyog tuaj yeem txo qis.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-21-2023