Nyob rau hauv cov dyeing thiab pigment ntau lawm saw, txoj kev tsim yog ib tug tseem ceeb kauj ruam nyob rau hauv transforming lub synthesized raw cov ntaub ntawv rau hauv ruaj khov thiab usable zog. Cov txheej txheem no tsis tsuas yog cuam tshuam rau cov khoom dispersibility, flowability, thiab cia stability tab sis kuj ncaj qha cuam tshuam rau kev ua hauj lwm efficiency thiab colouring zoo ntawm downstream daim ntaub ntawv. Vim qhov sib txawv ntawm lub cev morphology thiab cov txheej txheem ntawm kev ua ntawm dyes thiab pigments, lawv txoj kev tsim muaj qhov sib txawv, tab sis tag nrho cov hom phiaj ntawm kev tswj cov particle loj, morphology, thiab cov yam ntxwv saum npoo.
Dye forming feem ntau suav nrog kev ua cov hmoov thiab ua kua. Cov tshuaj synthesized dye los yog lim ncuav mog qab zib yog desolvated thiab qhuav kom tau cov hmoov nyoos. Tom qab ntawd, qhov loj me me yog hloov kho los ntawm txoj hauv kev xws li cua dav hlau milling, pob milling, lossis kev sib tsoo tshuab kom tau raws li qhov yuav tsum tau muaj ntawm cov ntawv thov sib txawv rau kev sib cais thiab kev nkag mus. Txhawm rau tiv thaiv kom tsis txhob ya raws thiab clumping, thiab plua plav dispersion, cov kab ntawm cov khoom ntxiv feem ntau siv rau cov hmoov av rau kev kho saum npoo, txhim kho flowability thiab dispersion stability hauv dej los yog cov kuab tshuaj. Cov kua formulations yog npaj los ntawm dissolving, filtering, thiab ntxiv antifreeze los yog preservatives los tsim cov concentrated tov los yog npaj txhij- rau - siv formulations, pab kom tsis tu ncua dosing nyob rau hauv kev lag luam xws li luam ntawv thiab dyeing. Cov txheej txheem molding yuav tsum nruj tswj qhov kub thiab txias, av noo, thiab kev sib tsoo siv kom tsis txhob muaj molecular degradation lossis xim hloov los ntawm kev siv tshuab ntau dhau.
Pigment molding txheej txheem muaj ntau haiv neeg, suav nrog kev sib tsoo qhuav, sib tsoo ntub dej, tshuaj tsuag kom qhuav, thiab granulation. Kev sib tsoo qhuav yog tsim rau qee qhov thermally ruaj khov inorganic pigments, refining coarse hais mus rau submicron qib los ntawm siab - ceev cuam tshuam thiab shearing, tab sis nws tso siab xav tau ntawm kev siv zog thiab khoom siv. Kev sib tsoo ntub dej yuav ntxiv cov xim ntxhib thiab dispersant rau cov khoom siv los yog cov kuab tshuaj, siv cov khoom siv xws li cov xuab zeb zeb thiab cov hlaws hlaws kom ua tiav cov dispersion thiab particle loj tswj. Cov slurry tshwm sim tuaj yeem siv ncaj qha rau hauv cov txheej txheem los yog number case, los yog tshuaj tsuag - ziab rau hauv cov hmoov yooj yim dispersible. Cov txheej txheem granulation, los ntawm cov ntsiav tshuaj, extrusion, los yog fluidized txaj granulation, sib sau cov hmoov zoo rau hauv cov khoom tsis tu ncua, txhim kho plua plav tswj thiab ntsuas qhov tseeb thaum pub mis, ua rau nws tsim tshwj xeeb rau cov xim yas thiab cov txheej txheem vaj tsev.
Txawm hais tias siv cov dyes lossis pigments, cov txheej txheem molding yuav tsum ua kom zoo rau lub cev thaum tswj cov xim ua haujlwm, thiab tsim tshwj xeeb rau cov ntawv thov tom ntej. Nrog rau kev txhim kho ntawm ntsuab manufacturing thiab automation theem, technologies xws li qis-kub zog- txuag ziab, kaw- voj sib tsoo, thiab ntse particle loj soj ntsuam tau maj mam nce, muab kev ntseeg tau zoo rau siab -zoo, qis-ib puag ncig{{6} khoom.