Cov Txheej Txheem Ntau Lawm ntawm Redispersible Polymer Hmoov

Cov txheej txheem tsim cov hmoov polymer redispersible (RPP) muaj ntau theem, suav nrog polymerization, tshuaj tsuag kom qhuav, thiab tom qab ua tiav. Nov yog cov lus piav qhia txog cov txheej txheem tsim khoom ib txwm muaj:

1. Kev ua polymerization:

Cov txheej txheem pib nrog kev polymerization ntawm monomers los tsim cov polymer dispersion lossis emulsion ruaj khov. Kev xaiv cov monomers nyob ntawm cov khoom xav tau thiab kev siv ntawm RPP. Cov monomers feem ntau suav nrog vinyl acetate, ethylene, butyl acrylate, thiab methyl methacrylate.

1. Kev Npaj Monomer: Cov monomers raug ntxuav thiab sib xyaw nrog dej, cov neeg pib, thiab lwm yam khoom ntxiv rau hauv lub thawv reactor.
2. Kev Ua Kom Sib Xyaws: Cov khoom sib xyaw ua ke ntawm monomer yuav raug ua kom sib xyaws raws li qhov kub thiab txias, siab, thiab kev sib xyaws. Cov neeg pib ua cov tshuaj sib xyaws ua ke, ua rau muaj cov saw polymer.
3. Kev Ruaj Ntseg: Cov tshuaj Surfactants lossis emulsifiers raug ntxiv rau kom ruaj khov cov polymer dispersion thiab tiv thaiv kev coagulation lossis agglomeration ntawm cov polymer particles.

2. Tshuaj tsuag kom qhuav:

Tom qab polymerization, cov polymer dispersion raug rau kev tsuag kom qhuav kom hloov nws mus ua hmoov qhuav. Kev tsuag ziab suav nrog kev ua kom cov dispersion ua cov tee me me, uas tom qab ntawd ziab hauv cov cua kub.

1. Atomization: Cov polymer dispersion raug pumped rau lub nozzle tsuag, qhov twg nws yog atomized rau hauv cov tee dej me me siv cov cua compressed lossis centrifugal atomizer.
2. Kev Qhuav: Cov tee dej raug coj mus rau hauv chav ziab, qhov chaw uas lawv kov cua kub (feem ntau yog cua sov rau qhov kub ntawm 150 ° C txog 250 ° C). Qhov dej ua pa sai sai ntawm cov tee dej ua rau muaj cov khoom khov.
3. Kev Sau Cov Khoom Me Me: Cov khoom qhuav raug sau los ntawm lub tshuab ziab khaub ncaws siv cov cua daj cua dub lossis lub hnab lim. Cov khoom me me yuav raug cais tawm ntxiv kom tshem tawm cov khoom loj dhau thiab xyuas kom meej tias cov khoom me me sib npaug.

3. Kev Ua Tom Qab:

Tom qab txau kom qhuav, RPP ua cov kauj ruam tom qab ua tiav los txhim kho nws cov khoom thiab xyuas kom meej tias cov khoom ruaj khov.

1. Txias: Cov RPP qhuav raug txias rau qhov kub thiab txias hauv chav kom tiv thaiv kev nqus dej noo thiab xyuas kom cov khoom ruaj khov.
2. Kev Ntim Khoom: RPP txias lawm ces muab ntim rau hauv cov hnab lossis thawv uas tiv tau dej noo kom tiv thaiv nws ntawm dej noo thiab av noo.
3. Kev Tswj Xyuas Zoo: RPP dhau los ntawm kev kuaj xyuas zoo kom paub tseeb tias nws cov khoom siv lub cev thiab tshuaj lom neeg, suav nrog qhov loj me ntawm cov khoom me me, qhov ceev ntawm cov khoom loj, cov dej noo seem, thiab cov ntsiab lus polymer.
4. Kev Khaws Cia: Cov RPP uas tau ntim khoom lawm yuav khaws cia rau hauv ib qho chaw tswj hwm kom nws ruaj khov thiab siv tau ntev txog thaum xa mus rau cov neeg siv khoom.

Xaus lus:

Cov txheej txheem tsim cov hmoov polymer uas rov ua dua tshiab suav nrog kev sib xyaw ntawm cov monomers los tsim cov polymer dispersion, ua raws li kev ziab kom hloov cov dispersion mus rau hauv cov hmoov qhuav. Cov kauj ruam tom qab ua tiav ua kom cov khoom zoo, ruaj khov, thiab ntim khoom rau kev khaws cia thiab faib tawm. Cov txheej txheem no ua rau muaj peev xwm tsim cov RPPs uas siv tau ntau yam thiab siv tau ntau yam hauv ntau yam lag luam, suav nrog kev tsim kho, xim thiab txheej, cov nplaum, thiab cov ntaub.