Lihlahisoa tsa livithamine kaofela li tsoa ho pulp ea k'hothone ea tlhaho kapa pulp ea lehong, e hlahisoang ka ho etherification. Lihlahisoa tse fapaneng tsa cellulose li sebelisa li-agent tse fapaneng tsa etherifying. Moemeli oa etherifying o sebelisoang ho hydroxyethyl cellulose (HEC) ke ethylene oxide, 'me moemeli oa etherifying o sebelisoang ho hydroxypropyl methylcellulose (HPMC) ke mefuta e meng ea li-agent tse etherifying. (chloromethane le propylene oxide).
Penteng ea 'nete ea szone le pente ea latex, hydroxyethyl cellulose e ka sebelisoa e le setenya.
Pente ea 'nete ea majoe e bonolo ho e lahla ka lebaka la bongata ba eona ba kakaretso le ho hlaka ho hoholo. Hoa hlokahala ho eketsa setenya ho eketsa ho teteana ha eona ho fihlela ho teteana ho hlokahalang bakeng sa ho fafatsa nakong ea kaho, ho ntlafatsa botsitso ba polokelo ea eona, le ho fihlela matla a itseng.
Haeba o batla hore pente ea 'nete ea majoe e fihlelle matla a matle, ho hanyetsa metsi hantle le ho hanyetsa boemo ba leholimo, khetho ea thepa e tala le moralo oa foromo li bohlokoa haholo.
Tlas'a maemo a tloaelehileng, bongata ba emulsion bo sebelisoang penteng ea 'nete ea majoe ea boleng bo holimo bo tla ba holimo haholo.
Mohlala, penteng ea 'nete ea majoe, ho ka ba le 300kg ea emulsion e hloekileng ea acrylic le 650kg ea lehlabathe la 'mala oa tlhaho. Ha lintho tse tiileng tsa emulsion li le 50%, bophahamo ba 300kg ea emulsion kamora ho omisa ke lilithara tse ka bang 150, 'me bophahamo ba 650kg ea lehlabathe ke lilithara tse ka bang 228. Ke hore, PVC (concentration ea bophahamo ba 'mala oa pigment) ea pente ea 'nete ea majoe ke 60% ka nako ena, hobane likaroloana tsa lehlabathe le 'mala li kholo ebile ha li na sebopeho se tloaelehileng, 'me tlas'a boemo ba kabo e itseng ea boholo ba likaroloana, pente ea 'nete ea majoe e omisitsoeng e ka ba ho CPVC (concentration ea boima bo bohlokoa). Concentration ea bophahamo ba 'mala oa pigment) hoo e ka bang. Ha e le sethibela-mafu, haeba u khetha cellulose e nang le viscosity e loketseng, pente ea 'nete ea majoe e ka etsa filimi ea pente e felletseng le e teteaneng ho fihlela litlhoko tse tharo tse kholo tsa ts'ebetso ea pente ea 'nete ea majoe. Haeba dikahare tsa emulsion ya pente ya majwe a sebele di le tlase, ho kgothaletswa ho sebedisa cellulose e nang le viscosity e phahameng e le setenya (jwalo ka viscosity ya 100,000), haholoholo kamora hore theko ya cellulose e eketsehe, e leng se ka fokotsang bongata ba cellulose e sebediswang mme sa etsa lejwe la nnete. Tshebetso ya pente e betere.
Bahlahisi ba bang ba pente ea majoe a theko e tlaase ba sebelisa hydroxypropyl methylcellulose ho e-na le hydroxyethyl cellulose bakeng sa litšenyehelo le lintlha tse ling.
Ha ho bapisoa le mefuta e 'meli ea cellulose, hydroxyethyl cellulose e na le ho boloka metsi ho betere, e ke ke ea lahleheloa ke ho boloka metsi ka lebaka la gelatin mochesong o phahameng, 'me e na le ho hanyetsa hlobo ho itseng. Bakeng sa lintlha tsa ts'ebetso, ho khothaletsoa ho sebelisa hydroxyethyl cellulose e nang le viscosity ea 100,000 e le setenya bakeng sa pente ea 'nete ea majoe.
Nako ea poso: Mmesa-28-2023