Hmoov polymer uas yaj tau dua (RDP)yog ib yam khoom siv hmoov uas ntws tau dawb los ntawm kev tsuag-qhuav ib qho emulsion polymer. Nws yog siv dav hauv cov ntaub ntawv tsim kho xws li cov mortar sib tov qhuav, cov nplaum pobzeb, hmoov putty, tus kheej-leveling, thiab cov txheej txheem rwb thaiv tsev phab ntsa sab nraud. Nws qhov tseem ceeb tshaj plaws yog nws lub peev xwm rov tawg dua hauv dej, rov qab mus rau polymer latex nrog cov yam ntxwv ntawm nws cov emulsion qub, yog li muab kev nplaum zoo heev, kev ywj pheej, thiab kev tiv thaiv dej rau cov khoom. Cov txheej txheem tsim khoom RDP muaj ntau kauj ruam tseem ceeb, los ntawm kev xaiv cov khoom siv raw mus rau cov khoom ntim tiav. Cov hauv qab no yuav piav qhia txog cov txheej txheem tag nrho, cov ntsiab lus tseem ceeb, thiab kev tswj hwm zoo.
1. Kev Xaiv Khoom Siv Raw thiab Kev Npaj Emulsion
Kev tsim khoom RDP yog ua los ntawm cov polymers emulsion. Cov txheej txheem polymer feem ntau suav nrog vinyl acetate-ethylene copolymer (VAE), acrylic esters, thiab styrene-acrylic esters. Cov txheej txheem polymer sib txawv txiav txim siab txog kev ua tau zoo ntawm RDP. Piv txwv li, VAE systems muab kev ywj pheej zoo heev thiab kev nplaum, ua rau lawv haum rau cov nplaum pobzeb thiab cov txheej txheem rwb thaiv tsev; thaum cov txheej txheem acrylic emulsion ntshiab muab kev tiv thaiv huab cua thiab UV tiv thaiv, ua rau lawv feem ntau siv rau hauv cov putties phab ntsa sab nraud lossis cov txheej txheem.
Feem ntau cov emulsions raug npaj los ntawm kev siv cov txheej txheem polymerization emulsion. Siv dej ua cov khoom sib kis, emulsifiers, initiators, thiab kev tswj qhov kub, monomers dhau los ua polymerization los ua cov polymer emulsion ruaj khov. Cov kauj ruam no yuav tsum tau tswj hwm nruj ntawm qhov loj me ntawm cov khoom me me, cov khoom khov, thiab viscosity kom ntseeg tau tias cov khoom kawg ruaj khov thiab ua tau zoo.
2. Cov Txheej Txheem Tsuag Kom Qhuav
Tom qab ua tiav cov emulsion lawm, nws yuav hloov mus ua hmoov los ntawm kev tsuag kom qhuav, uas yog cov kauj ruam tseem ceeb hauv kev tsim khoom RDP. Cov kauj ruam ntawm cov txheej txheem suav nrog:
Kev Tsuag Atomization: Cov emulsion raug atomized ua cov tee dej me me heev siv lub nozzle siab lossis centrifugal atomizer. Lub cheeb tsam ntawm cov tee dej feem ntau raug tswj kom txog kaum tawm microns kom ntseeg tau tias qhov ua haujlwm qhuav thiab cov hmoov sib xws.
Kev Qhuav Cua Kub: Cov tee dej uas raug atomized yuav kov tau cua kub kub (kwv yees li 120-180°C), ua rau cov dej ua pa sai sai thiab ua kom cov khoom emulsion qhuav ua cov khoom me me. Cov txheej txheem no xav tau qhov kub thiab sijhawm sib npaug kom tsis txhob kub dhau uas yuav ua rau cov polymer yaj lossis lwj.
Kev Txheej Txheem Nto thiab Kev Kho Mob Tiv Thaiv Kev Nplaum: Vim tias cov khoom polymer feem ntau yuav nplaum, feem ntau ntxiv cov colloid tiv thaiv, xws li polyvinyl cawv (PVA), thaum lub sijhawm ziab kom ua ib daim zaj duab xis tiv thaiv. Qhov no tiv thaiv cov hmoov kom tsis txhob lo ua ke thiab ua rau cov hmoov tawg sai dua hauv dej.
Kev Faib Tawm thiab Kev Sau Huab Cua: Tom qab ziab, cov hmoov tiav lawm raug sau los ntawm kev siv lub tshuab cais cua daj cua dub thiab lub hnab lim kom ntseeg tau tias cov khoom me me sib npaug thiab tshem tawm cov hmoov av me me.
3. Kev Tswj Xyuas Zoo thiab Kev Hloov Kho
Kev tswj xyuas kom zoo yog qhov tseem ceeb thoob plaws hauv tag nrho cov txheej txheem tsim khoom. Cov cim qhia tseem ceeb ntawm kev kuaj xyuas suav nrog:
Kev Faib Tawm Qhov Loj thiab Kev Nqus Tau: Xyuas kom meej tias cov hmoov sib xyaw ua ke hauv cov khoom qhuav, tiv thaiv kev sib sau ua ke.
Cov dej noo seem: Feem ntau tswj tau hauv 1% -2% kom tiv thaiv cov dej noo thiab agglomeration thaum lub sijhawm khaws cia.
Kev tawg dua tshiab: Qhov no sim cov hmoov qhov nrawm ntawm kev tawg thiab qhov loj me ntawm cov khoom me me rov qab los hauv dej, uas yog cov cim qhia tseem ceeb rau kev ntsuam xyuas qhov zoo ntawm RDP.
Lub Zog Lo thiab Kev Yoog Tau: Qhov no raug sim los ntawm kev sim nrog cov txheej txheem mortar los tshuaj xyuas nws cov txiaj ntsig rau kev txhim kho kev ua tau zoo ntawm cov khoom siv hauv tsev.
Qee cov khoom kuj tseem hloov kho kom ua haujlwm tau zoo, xws li ntxiv cov tshuaj hydrophobic kom txhim kho kev tiv thaiv dej lossis qhia cov monomer uas yoog tau los txhim kho kev tiv thaiv kab nrib pleb. Cov kev hloov kho no ua rau RDP ua tau raws li qhov xav tau tshwj xeeb ntawm ntau yam kev siv hauv tsev.
4. Ntim Khoom thiab Khaws Cia
Cov khoom tiav lawm ntawm RDP feem ntau yog ntim rau hauv cov hnab ntawv sib xyaw ua ke ntau txheej uas muaj zaj duab xis tiv thaiv dej noo, nrog rau qhov loj me ib txwm muaj 20 kg ib lub hnab. Kev khaws cia yuav tsum khaws cia kom deb ntawm cov dej noo thiab tshav ntuj ncaj qha, thiab qhov kub ntawm lub tsev rau khoom yuav tsum tswj hwm ntawm 5 ° C thiab 35 ° C. Kev ntim khoom thiab kev khaws cia kom zoo yog qhov tseem ceeb rau kev ua kom lub neej txee ntawm RDP (feem ntau 12 lub hlis).
Cov txheej txheem tsim khoom rau cov hmoov polymer redispersibleyog ib lub thev naus laus zis uas ua ke cov tshuaj polymer, emulsion polymerization, spray drying, thiab powder engineering. Los ntawm kev tswj xyuas zoo thoob plaws hauv tag nrho cov txheej txheem, suav nrog kev xaiv cov khoom siv raw, kev npaj emulsion, spray drying, thiab kev tswj xyuas zoo, peb tsim cov khoom RDP nrog kev sib kis zoo heev thiab cov khoom siv. Nws siv dav hauv cov ntaub ntawv niaj hnub tsis yog tsuas yog txhim kho kev ua haujlwm ntawm kev tsim kho xwb tab sis kuj txhawb kev txhim kho cov ntaub ntawv tsim kho ntsuab.
Lub sijhawm tshaj tawm: Lub Yim Hli-29-2025