Abstract: Tsab xov xwm no tshuaj xyuas cov ntsiab lus txog qhov zoo ntawm cov khoom siv leveling ntawm cov nplaum hauv cov txheej txheem lamination. Ntxiv rau qhov no, nws hais tias es tsis txhob txiav txim siab txog kev ua tau zoo ntawm leveling los ntawm kev txiav txim siab yog tias muaj'cov pob dawb' lossis 'npuas', nws yog qhov pob tshab ntawm cov khoom laminated uas tuaj yeem yog tus qauv ntsuas ntawm kev ua tau zoo hauv cov nplaum.
1. Qhov Teeb Meem Npuas thiab Kev Sib Npaug ntawm Cov Kua Nplaum
Cov pob dawb, npuas dej, thiab tsis pom tseeb yog cov teeb meem zoo li qub hauv kev ua cov khoom sib xyaw. Feem ntau, cov neeg ua cov khoom sib xyaw hais tias cov teeb meem saum toj no yog vim tsis tau sib npaug zoo ntawm cov nplaum!
1.1 Cov kua nplaum no tsis yog cov kua nplaum ntawd
Cov neeg ua cov khoom sib xyaw ua ke tuaj yeem xa cov thoob nplaum uas tsis tau qhib thiab tsis tau siv rov qab rau cov neeg muag khoom raws li kev txiav txim siab ntawm cov nplaum tsis zoo, lossis xa cov lus tsis txaus siab lossis cov lus thov nrog cov neeg muag khoom.
Yuav tsum nco ntsoov tias cov kua nplaum uas suav tias tsis zoo yog cov "kua nplaum ua haujlwm" uas tau npaj/diluted los ntawm cov neeg siv khoom thiab muaj qhov viscosity ntawm tus nqi tshwj xeeb. Cov kua nplaum uas xa rov qab yog lub thoob kua nplaum qub uas tsis tau qhib.
Ob lub thoob ntawm "kua nplaum" no yog cov tswv yim thiab yam sib txawv kiag li!
1.2 Cov ntsuas kev ntsuam xyuas rau kev sib npaug ntawm cov kua nplaum
Cov ntsuas kev siv tshuab los ntsuam xyuas qhov ua tau zoo ntawm cov nplaum yuav tsum yog viscosity thiab qhov ntub ntawm qhov chaw. Los yog, "qhov fluidity ntawm cov kua nplaum" yog kev sib xyaw ua ke ntawm "fluidity ntawm cov kua nplaum" thiab "qhov ntub ntawm cov kua nplaum".
Thaum sov li chav tsev, qhov nro ntawm qhov ntub dej ntawm ethyl acetate yog li 26mN / m.
Qhov concentration ntawm cov kua nplaum polyurethane uas siv rau hauv kev ua cov khoom sib xyaw feem ntau yog li ntawm 50% -80%. Ua ntej siv cov txheej txheem sib xyaw, cov kua nplaum saum toj no yuav tsum tau diluted kom txog thaum nws muaj concentration li ntawm 20% -45%.
Vim tias qhov tseeb tias cov khoom tseem ceeb hauv cov kua nplaum ua haujlwm yog ethyl acetate, qhov kev ntxhov siab ntawm qhov ntub ntawm cov kua nplaum ua haujlwm yuav ze rau qhov kev ntxhov siab ntawm qhov ntub ntawm ethyl acetate nws tus kheej.
Yog li ntawd, tsuav yog qhov kev ntxhov siab ntawm qhov chaw ntub dej ntawm cov khoom sib xyaw ua ke siv tau raws li qhov yuav tsum tau ua ntawm kev ua cov khoom sib xyaw, qhov kev ntub dej ntawm cov nplaum yuav zoo heev!
Kev ntsuam xyuas qhov fluidity ntawm cov kua nplaum yog viscosity. Hauv kev ua cov khoom sib xyaw, qhov hu ua viscosity (piv txwv li viscosity ua haujlwm) yog hais txog lub sijhawm hauv vib nas this uas cov kua nplaum ua haujlwm ntsib thaum ntws tawm ntawm lub khob viscosity, ntsuas siv cov qauv tshwj xeeb ntawm lub khob viscosity. Nws tuaj yeem xav tias cov kua nplaum ua haujlwm uas npaj los ntawm ntau qib ntawm cov kua nplaum qub muaj tib yam "viscosity ua haujlwm", thiab nws "kua nplaum ua haujlwm" muaj tib yam "fluidity kua nplaum"!
Nyob rau hauv lwm yam mob uas tsis hloov pauv, qhov qis dua qhov "ua haujlwm viscosity" ntawm "ua haujlwm kua" uas npaj nrog tib hom nplaum, qhov zoo dua nws "nplaum fluidity"!
Tshwj xeeb tshaj yog, rau ntau qib sib txawv ntawm cov nplaum, yog tias tus nqi viscosity ntawm cov tshuaj ua haujlwm diluted yog 15 vib nas this, ces cov tshuaj ua haujlwm npaj los ntawm cov qib ntawm cov nplaum no muaj tib yam "glue leveling".
1.3 Cov khoom siv sib npaug ntawm cov kua nplaum yog ib qho yam ntxwv ntawm cov kua nplaum ua haujlwm
Qee cov cawv tsis ua kua nplaum thaum lub thoob qhib, tab sis zoo li cov khoom siv uas tsis muaj kua nplaum. Yuav tsum yaj thiab ntxiv cov organic solvent kom tau cov kua nplaum uas xav tau.
Nws yog qhov tseeb tias qhov kev ua tau zoo ntawm cov kua nplaum yog kev ntsuam xyuas ntawm cov tshuaj ua haujlwm uas tau tsim rau hauv ib qho "kev ua haujlwm concentration", es tsis yog kev ntsuam xyuas ntawm cov kua nplaum qub uas tsis tau diluted.
Yog li ntawd, nws tsis yog qhov tseeb los muab qhov tsis zoo ntawm cov kua nplaum rau cov yam ntxwv ntawm ib hom kua nplaum qub!
2. Cov yam ntxwv cuam tshuam rau qhov sib npaug ntawm cov nplaum
Txawm li cas los xij, rau cov kua nplaum ua haujlwm diluted, muaj qhov sib txawv ntawm nws cov dej nplaum!
Raws li tau hais ua ntej lawm, cov cim qhia tseem ceeb rau kev ntsuam xyuas qhov kev ua tau zoo ntawm cov kua nplaum ua haujlwm yog qhov kev ntxhov siab ntawm qhov ntub dej thiab kev ua haujlwm viscosity. Qhov cim qhia ntawm qhov kev ntxhov siab ntawm qhov ntub dej tsis qhia txog kev hloov pauv tseem ceeb hauv qhov ntau ntawm kev ua haujlwm ib txwm muaj. Yog li ntawd, qhov tseem ceeb ntawm kev ua kom cov nplaum tsis zoo yog tias thaum lub sijhawm thov, qhov viscosity ntawm cov nplaum nce ntxiv vim muaj qee yam, ua rau nws qhov kev ua tau zoo txo qis!
Yam dab tsi ua rau muaj kev hloov pauv ntawm qhov viscosity ntawm cov kua nplaum thaum nws daim ntawv thov?
Muaj ob yam tseem ceeb uas ua rau muaj kev hloov pauv ntawm qhov viscosity ntawm cov kua nplaum, ib qho yog qhov kub ntawm cov kua nplaum, tab sis qhov concentration ntawm cov kua nplaum.
Nyob rau hauv ib txwm muaj xwm txheej, qhov viscosity ntawm cov kua dej txo qis nrog rau qhov kub nce ntxiv.
Hauv cov phau ntawv qhia siv uas muab los ntawm ntau lub tuam txhab nplaum sib txawv, cov nqi viscosity ntawm cov kua nplaum (ua ntej thiab tom qab dilution) ntsuas siv lub rotary viscometer lossis khob viscosity ntawm qhov kub ntawm kua ntawm 20 ° C lossis 25 ° C (piv txwv li qhov kub ntawm cov kua nplaum nws tus kheej) feem ntau yog qhia.
Ntawm sab neeg siv khoom, yog tias qhov kub cia ntawm lub thoob kua nplaum thiab cov tshuaj diluent (ethyl acetate) siab dua lossis qis dua 20 ° C lossis 25 ° C, qhov kub ntawm cov kua nplaum uas tau npaj tseg kuj yuav siab dua lossis qis dua 20 ° C lossis 25 ° C. Ntawm chav kawm, qhov tseeb viscosity ntawm cov kua nplaum uas tau npaj tseg kuj yuav qis dua qhov viscosity uas tau qhia hauv phau ntawv qhia. Thaum lub caij ntuj no, qhov kub ntawm cov kua nplaum uas tau npaj tseg yuav qis dua 5 ° C, thiab thaum lub caij ntuj sov, qhov kub ntawm cov kua nplaum uas tau npaj tseg yuav siab dua 30 ° C!
Yuav tsum nco ntsoov tias ethyl acetate yog cov organic solvent uas volatile heev. Thaum lub sij hawm volatilization ntawm ethyl acetate, nws yuav nqus tau ntau qhov kub ntawm cov kua nplaum thiab cov huab cua nyob ib puag ncig.
Tam sim no, feem ntau cov chav laminating hauv cov tshuab sib xyaw ua ke qhib thiab nruab nrog cov khoom siv tso pa tawm hauv zos, yog li ntau cov kuab tshuaj yuav ua pa tawm ntawm lub disc nplaum thiab lub thoob. Raws li kev soj ntsuam, tom qab lub sijhawm ua haujlwm, qhov kub ntawm cov kua nplaum ua haujlwm hauv lub tais nplaum qee zaum yuav ntau dua 10 ° C qis dua qhov kub ib puag ncig!
Raws li qhov kub ntawm cov kua nplaum maj mam txo qis, qhov viscosity ntawm cov kua nplaum yuav maj mam nce.
Yog li, qhov kev ua tau zoo ntawm cov kua nplaum uas ua los ntawm cov kuab tshuaj maj mam poob qis nrog lub sijhawm ua haujlwm ntev ntawm cov khoom siv.
Hauv lwm lo lus, yog tias koj xav kom tswj tau qhov ruaj khov ntawm cov tshuaj nplaum uas ua los ntawm cov kuab tshuaj, koj yuav tsum siv cov tshuaj tswj viscosity lossis lwm yam zoo sib xws los ua kom cov nplaum viscosity ruaj khov thoob plaws hauv cov txheej txheem thov.
3. Cov ntsuas ntsuas rau cov txiaj ntsig ntawm kev sib npaug ntawm cov kua nplaum
Qhov kev ntsuam xyuas ntawm qhov tshwm sim ntawm cov kua nplaum yuav tsum yog ib qho yam ntxwv ntawm cov khoom sib xyaw ua ke ntawm ib theem tshwj xeeb, thiab qhov tshwm sim ntawm cov kua nplaum hais txog qhov tshwm sim tau tom qab siv cov kua nplaum. Ib yam li "qhov ceev tshaj plaws uas tsim los" ntawm lub tsheb yog ib qho yam ntxwv ntawm cov khoom, qhov ceev tiag tiag ntawm lub tsheb ntawm txoj kev hauv qab cov xwm txheej tshwj xeeb yog lwm qhov tshwm sim.
Kev ua kom cov kua nplaum zoo yog qhov tseem ceeb rau kev ua kom tau qhov zoo. Txawm li cas los xij, kev ua kom cov kua nplaum zoo tsis tas yuav ua rau cov kua nplaum zoo, thiab txawm tias cov kua nplaum tsis ua haujlwm zoo (piv txwv li viscosity siab), cov kua nplaum zoo tseem tuaj yeem ua tiav hauv qee qhov xwm txheej.
4. Kev sib raug zoo ntawm cov txiaj ntsig ntawm kev sib xyaw kua nplaum thiab cov xwm txheej ntawm "cov pob dawb" thiab "npuas"
Cov "pob dawb, npuas, thiab pob tshab" tsis zoo yog ntau yam tsis zoo ntawm cov khoom sib xyaw. Muaj ntau yam ua rau muaj teeb meem saum toj no, thiab kev tsis sib npaug ntawm cov kua nplaum tsuas yog ib qho ntawm lawv. Txawm li cas los xij, qhov laj thawj rau kev tsis sib npaug ntawm cov kua nplaum tsis yog vim tsis sib npaug ntawm cov kua nplaum xwb!
Cov kua nplaum uas tsis sib npaug zoo yuav tsis ua rau muaj "cov pob dawb" lossis "npuas", tab sis nws tuaj yeem cuam tshuam rau qhov pom tseeb ntawm cov zaj duab xis sib xyaw. Yog tias qhov sib npaug me me ntawm cov khoom sib xyaw tsis zoo, txawm tias qhov sib npaug ntawm cov nplaum zoo, tseem muaj qhov ua tau ntawm "cov pob dawb thiab npuas".
Lub sijhawm tshaj tawm: Lub Ib Hlis-17-2024