Lihlahisoa tsa cellulose li tsoa ho makhasi a k'hothone a tlhaho kapa makhasi a lehong ka etherification.Lihlahisoa tse fapaneng tsa cellulose li sebelisa li-etherifying agents tse fapaneng.Hypromellose HPMC e sebelisa mefuta e meng ea li-etherifying agents (chloroform le 1,2-epoxypropane) , ha hydroxyethyl cellulose HEC eona e sebelisa Oxirane etherifying agents.Hydroxyethyl cellulose e ka sebelisoa e le motenya ka pente ea 'nete ea majoe le pente ea latex.Ka lebaka la bongata ba eona bo bongata, matla a khoheli a itseng, pula, e hloka ho eketsa motenya ho eketsa viscosity ea eona, e le ho fihlela litlhoko tsa viscosity ea kaho, le ho ntlafatsa botsitso ba polokelo, le ho fihlela matla a itseng.Ho finyella matla a matle, ho hanyetsa metsi a matle le ho hanyetsa boemo ba leholimo, khetho ea thepa e tala le moralo oa tlhahiso ke ea bohlokoa haholo.
Ka kakaretso, palo ea emulsion ea boleng ba boleng ba 'nete ea pente ea majoe e tla ba e phahameng.Ka mohlala, pente ea 'nete ea lejoe e ka ba le 300 kg ea emulsion e hloekileng ea acrylic le 650 kg ea lehlabathe la majoe a tlhaho.Ha litaba tse tiileng tsa emulsion ke 50% , molumo oa emulsion ea 300 kg ka mor'a ho omisa e ka ba lilithara tse 150, 650 Kg ea lehlabathe e ka bang 228 litres.Ke hore, ka nako ena PVC (pigment volume concentration) ea pente ea sebele ea majoe ke 60% , hobane likaroloana tsa lehlabathe le mebala li kholo ebile li sa tloaeleha ka sebōpeho, tlas'a boemo ba ho aroloa ha likaroloana tse itseng, ka mor'a ho omisa. pente ea sebele ea majoe e ka 'na ea e-ba ho CPVC (critical pigment volume concentration) ka.Bakeng sa thickener, haeba viscosity e nepahetseng ea selulose e khethiloe, filimi e batlang e le e feletseng le e teteaneng e ka thehoa ho finyella litlhoko tse tharo tse kholo tsa ts'ebetso ea pente ea sebele ea majoe.Haeba litaba tsa emulsion li le tlase, ho kgothaletswa ho sebelisa viscosity e phahameng ea selulose e le motenya (mohlala 100,000 viscosity) , haholo-holo ka mor'a hore theko ea selulose e eketsehe, e ka fokotsang palo ea selulose e sebelisoang, hape e ka lumella tshebetso. ea pente ea sebele ea majoe e phahametse ho feta.Baetsi ba bang ba lipente tsa majoe tsa sebele tsa theko e tlaase ba nketse hydroxyethyl cellulose sebaka ka hypromellose ka lebaka la litšenyehelo le lintlha tse ling.Ha e bapisoa le mefuta e 'meli ea selulose, hydroxyethyl cellulose e na le matla a molemo a ho tšoara metsi, ha e lahleheloe ke matla a ho tšoara metsi ka lebaka la gel mocheso o phahameng,' me e na le ho hanyetsa hlobo ho itseng.Molemong oa ts'ebetso, ho khothalletsoa ho sebelisa 100,000 viscosity hydroxyethyl cellulose e le motenya oa pente ea 'nete ea majoe.
Nako ea poso: Jul-24-2023