Inkqubo yoMveliso wePowder yePolymer ephinda iDispesible

Inkqubo yokuvelisa i-redispersible polymer powder (RPP) ibandakanya amanqanaba aliqela, kuquka i-polymerization, ukomisa nge-spray, kunye ne-post-processing. Nantsi inkcazo-ntetho yenkqubo eqhelekileyo yokuvelisa:

1. Ukwenziwa kwePolymerization:

Inkqubo iqala ngokwenziwa kwe-polymerization yee-monomers ukuvelisa i-polymer dispersion okanye i-emulsion ezinzileyo. Ukukhethwa kwee-monomers kuxhomekeke kwiipropati ezifunwayo kunye nokusetyenziswa kwe-RPP. Ii-monomers eziqhelekileyo ziquka i-vinyl acetate, i-ethylene, i-butyl acrylate, kunye ne-methyl methacrylate.

1. Ukulungiswa kweMonomer: IiMonomer ziyacocwa kwaye zixutywe namanzi, ii-initiators, kunye nezinye izongezo kwisitya se-reactor.
2. Ukwenziwa kwepolymer: Umxube we-monomer ufakwa kwi-polymerization phantsi kobushushu obulawulwayo, uxinzelelo, kunye neemeko zokushukuma. Abaqalisi baqala i-polymerization reaction, ekhokelela ekwakhiweni kwee-polymer chain.
3. Ukuzinza: Ii-surfactants okanye ii-emulsifiers zongezwa ukuzinzisa ukusasazwa kwe-polymer kunye nokuthintela ukujiya okanye ukuhlangana kwee-polymer particles.

2. Ukomisa ngeSpray:

Emva kokuba i-polymerization ipholimeyiwe, i-polymer dispersion ifakwa kwi-spray dry ukuze iguqulwe ibe yi-powder eyomileyo. Ukomisa nge-spray kubandakanya ukwenza i-atomize i-dispersion ibe ngamaconsi amancinci, aze omiswe kumlambo womoya oshushu.

1. I-Atomization: I-polymer dispersion ipompelwa kwi-spray nozzle, apho i-atomized ibe ngamaconsi amancinci kusetyenziswa umoya ocinezelweyo okanye i-centrifugal atomizer.
2. Ukomisa: Amathontsi afakwa kwigumbi lokomisa, apho adibana nomoya oshushu (ngokudla ngokufudunyezwa ukuya kumaqondo obushushu aphakathi kwe-150°C ukuya kwi-250°C). Ukufuma ngokukhawuleza kwamanzi avela kumathontsi kukhokelela ekudalweni kwamasuntswana aqinileyo.
3. Ukuqokelelwa kweeNgcambu: Iingcambu ezomileyo ziqokelelwa kwigumbi lokomisa kusetyenziswa iinkanyamba okanye izihluzi zeengxowa. Iingcambu ezincinci zinokuhlelwa ngakumbi ukuze kususwe iingcambu ezinkulu kwaye kuqinisekiswe ukuba ubungakanani beengcambu buyafana.

3. Ukucutshungulwa emva kokucutshungulwa:

Emva kokomiswa kwesitshizi, i-RPP ithatha amanyathelo emva kokulungiswa ukuze iphucule iipropati zayo kwaye iqinisekise uzinzo lwemveliso.

1. Ukupholisa: I-RPP eyomileyo ipholiswa kubushushu begumbi ukuthintela ukufunxwa komswakama nokuqinisekisa uzinzo lwemveliso.
2. Ukupakishwa: I-RPP epholileyo ipakishwa kwiingxowa okanye kwiikhonteyina ezimelana nokufuma ukuze ikhuseleke kumswakama kunye nokufuma.
3. Ulawulo Lomgangatho: I-RPP ivavanywa kulawulo lomgangatho ukuqinisekisa iipropati zayo zomzimba nezekhemikhali, kubandakanya ubungakanani bamasuntswana, ubuninzi bobuninzi, umxholo womswakama oseleyo, kunye nomxholo wepolymer.
4. Indawo yokugcina: I-RPP epakishiweyo igcinwa kwindawo elawulwayo ukuze ihlale izinzile kwaye ihlale ixesha elide ide ithunyelwe kubathengi.

Isiphelo:

Inkqubo yokuvelisa umgubo wepolymer ophinda uqhekeke ibandakanya ukwenziwa kwe-polymerization yee-monomers ukuvelisa ukusasazwa kwe-polymer, kulandele ukomiswa kwe-spray ukuguqula ukusasazwa kube yimo yomgubo owomileyo. Amanyathelo okulungisa emva kokuqinisekisa aqinisekisa umgangatho wemveliso, uzinzo, kunye nokupakishwa kokugcinwa nokusasazwa. Le nkqubo ivumela ukwenziwa kwee-RPP ezinokuguquguquka nezinemisebenzi emininzi ezisetyenziswa kumashishini ahlukeneyo, kubandakanya ulwakhiwo, iipeyinti kunye neengubo, izincamathelisi, kunye nempahla.