Cov txheej txheem tsim khoom ntawm Redispersible Polymer Powder

Cov txheej txheem tsim khoom ntawm redispersible polymer hmoov (RPP) suav nrog ntau theem, suav nrog polymerization, tshuaj tsuag kom qhuav, thiab tom qab ua tiav. Ntawm no yog ib qho kev piav qhia ntawm cov txheej txheem ntau lawm:

1. Polymerization:

Cov txheej txheem pib nrog lub polymerization ntawm monomers los tsim ib tug ruaj khov polymer dispersion los yog emulsion. Kev xaiv ntawm monomers nyob ntawm seb 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: Monomers tau lim thiab sib xyaw nrog dej, cov neeg pib, thiab lwm yam khoom ntxiv hauv lub nkoj reactor.
2. Polymerization: Cov monomer sib tov dhau los ua polymerization nyob rau hauv kev tswj kub, siab, thiab agitation tej yam kev mob. Initiators pib cov tshuaj tiv thaiv polymerization, ua rau tsim cov saw hlau polymer.
3. Stabilization: Surfactants lossis emulsifiers tau ntxiv kom ruaj khov ntawm cov polymer dispersion thiab tiv thaiv coagulation los yog agglomeration ntawm polymer hais.

2. Txau kom qhuav:

Tom qab polymerization, lub polymer dispersion yog raug tshuaj tsuag kom qhuav los hloov nws mus rau hauv cov hmoov qhuav. Txau kom qhuav yuav ua rau atomizing cov dispersion mus rau hauv cov tee dej, uas yog ces qhuav nyob rau hauv ib tug kub cua kwj.

1. Atomization: Lub polymer dispersion yog pumped mus rau ib tug tshuaj tsuag nozzle, qhov twg nws yog atomized rau hauv me me droplets siv compressed cua los yog ib tug centrifugal atomizer.
2. Kev ziab: Cov tee dej tau nkag mus rau hauv lub tshuab ziab khaub ncaws, qhov chaw uas lawv tuaj rau hauv cov cua kub (feem ntau rhuab mus rau qhov kub ntawm 150 ° C txog 250 ° C). Cov evaporation sai ntawm cov dej los ntawm cov tee dej ua rau tsim cov khoom siv.
3. Particle Collection: Cov khoom qhuav yog sau los ntawm lub tshuab ziab khaub ncaws uas siv cyclones lossis lub hnab lim. Cov khoom zoo tuaj yeem raug muab faib ntxiv kom tshem tawm cov khoom loj thiab ua kom cov khoom sib txawv me me.

3. Tom qab ua tiav:

Tom qab cov tshuaj tsuag kom qhuav, RPP tau dhau los ua cov kauj ruam tom qab txhawm rau txhim kho nws cov khoom thiab ua kom cov khoom ruaj khov.

1. Txias: RPP qhuav yog txias rau hauv chav sov kom tiv thaiv kom tsis txhob ya raws thiab ua kom cov khoom ruaj khov.
2. Ntim: Lub RPP txias yog ntim rau hauv cov hnab ntim dej los yog cov thawv ntim los tiv thaiv nws los ntawm ya raws thiab av noo.
3. Kev tswj kom zoo: RPP intergoes zoo tswj kev ntsuas tshuaj ntsuam xyuas nws lub cev, suav cov ntsiab lus me me, cov ntsiab lus noo noo, thiab cov ntsiab lus polymer.
4. Cia: Lub hnab ntim RPP khaws cia rau hauv ib puag ncig tswj kom nws ruaj khov thiab txee lub neej kom txog thaum nws xa mus rau cov neeg siv khoom.

Xaus:

Cov txheej txheem ntau lawm ntawm redispersible polymer hmoov koom nrog polymerization ntawm monomers los tsim cov polymer dispersion, ua raws li cov tshuaj tsuag kom qhuav los hloov cov dispersion 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 xa tawm. Cov txheej txheem no ua rau kev tsim khoom ntawm ntau yam thiab ntau yam RPPs siv nyob rau hauv ntau yam lag luam, suav nrog kev tsim kho, xim thiab txheej, nplaum, thiab textiles.