Ha viscosity ea hydroxypropyl methylcellulose e phahame, e ntlafatsa ts'ebetso ea ho boloka metsi.Viscosity ke parameter ea bohlokoa bakeng sa ts'ebetso ea HPMC.Hajoale, bahlahisi ba fapaneng ba HPMC ba sebelisa mekhoa le lisebelisoa tse fapaneng ho lekanya viscosity ea HPMC.Mekhoa e ka sehloohong ke Haake Rotovisko, Hoppler, Ubbelohde le Brookfield.
Bakeng sa sehlahisoa se tšoanang, liphetho tsa viscosity tse lekantsoeng ka mekhoa e fapaneng li fapana haholo, 'me tse ling li fapane habeli.Ka hona, ha u bapisa li-viscosities, etsa bonnete ba hore u e etsa pakeng tsa mekhoa e tšoanang ea teko, ho kenyelletsa mocheso, spindle, joalo-joalo.
Mabapi le boholo ba likaroloana, ha likaroloana li le ntle, ho boloka metsi ho molemo.Ha likaroloana tse kholo tsa cellulose ether li kopana le metsi, bokaholimo bo qhibiliha hang-hang ho etsa gel, e koahelang thepa le ho thibela ho kenella ho tsoelang pele ha limolek'hule tsa metsi..E ama haholo phello ea ho boloka metsi ea cellulose ether ea eona, 'me ho qhibiliha ke e' ngoe ea lintlha tsa ho khetha cellulose ether.Fineness hape ke sesupo sa bohlokoa sa ts'ebetso ea methylcellulose ether.MC e sebelisoang seretseng se ommeng e hlokeha hore e be phofo, e nang le mongobo o fokolang, 'me botle bo boetse bo hloka 20% ho 60% ea boholo ba likaroloana ho ba ka tlaase ho 63um.Fineness e ama ho qhibiliha ha hydroxypropyl methylcellulose ether.Coarse MC hangata e na le granular mme e qhibiliha habonolo ka metsing ntle le ho baka, empa sekhahla sa ho qhibiliha se lieha haholo, kahoo ha sea lokela ho sebelisoa seretseng se omileng.Ka seretse se omeletseng, MC e hasane ka thepa ea samente e kang aggregate, filler e ntle le samente.Ke li-powders tse lekaneng feela tse tla thibela methylcellulose ether hore e se ke ea kopana ha e kopantsoe le metsi.Ha MC e eketsa metsi ho qhala li-aggregates, ho thata ho qhala le ho qhibiliha.MC e nang le fineness e mahoashe ha e bake litšila feela, empa hape e fokotsa matla a sebaka sa seretse.Ha mofuta ona oa seretse se omeletseng o hahoa sebakeng se seholo, lebelo la ho folisa la seretse se omeletseng sa sebakeng seo le fokotseha haholo, 'me ho phunyeha ho etsahala ka lebaka la linako tse fapaneng tsa ho phekola.Bakeng sa seretse sa spray ho sebelisa kaho ea mechine, ho hlokahala botle bo phahameng ka lebaka la nako e khutšoanyane ea ho kopanya.
Ha re bua ka kakaretso, ha viscosity e phahame, phello e ntle ea ho boloka metsi.Leha ho le joalo, ho phahama ha viscosity le boima ba limolek'hule tsa MC, ho fokotseha ho lumellanang ha solubility, e nang le tšusumetso e mpe ho matla le ts'ebetso ea kaho ea seretse.Ha li-viscosity li phahame, ho hlakile haholoanyane phello e teteaneng ea seretse, empa ha e lekane.Ha viscosity e phahame, seretse se kolobileng se tiea haholoanyane.E tla khomarela scraper nakong ea kaho 'me e na le sekhomaretsi se phahameng ho substrate.Empa e etsa ho fokolang ho eketsa matla a sebopeho sa seretse se metsi ka boeona.Nakong ea ts'ebetso ea kaho, ts'ebetso ea anti-sag e ne e sa totobala.Ka lehlakoreng le leng, li-ether tse ling tse tlaase-viscosity empa tse fetotsoeng tsa methylcellulose li na le thepa e babatsehang ea ho ntlafatsa matla a sebopeho sa liretse tse metsi.
Ha palo e kholo ea ether ea cellulose e kentsoeng seretseng, e ntlafatsa ts'ebetso ea ho boloka metsi, 'me ha viscosity e phahame, e ntlafatsa ts'ebetso ea ho boloka metsi.
Botle ba HPMC bo boetse bo na le tšusumetso e itseng ho bolokoeng ha metsi.Ka kakaretso, bakeng sa li-ether tsa methyl cellulose tse nang le viscosity e tšoanang empa botle bo fapaneng, ha chelete e eketsoang e lekana, ha boleng bo botle bo le botle, phello ea ho boloka metsi e betere.
Ho boloka metsi ha HPMC ho boetse ho amana le mocheso oa tšebeliso.Ho boloka metsi a methylcellulose ether ho fokotseha ha mocheso o ntse o eketseha.Leha ho le joalo, lits'ebetsong tsa 'nete, seretse se omileng hangata se hahuoa holim'a li-substrates tse chesang tse nang le mocheso o phahameng (ka holimo ho likhato tse 40) libakeng tse ngata, tse kang putty plastering maboteng a ka ntle tlas'a letsatsi la lehlabula, leo hangata le potlakisang ho tiisa samente le ho fifala ha mebala. samente.thatafatsa.Seretse se ommeng.Ho fokotseha ha ho boloka metsi ho hlakisa hore ho sebetsa le ho hanyetsa mapheo ho tla ameha, 'me ho bohlokoa haholo ho fokotsa tšusumetso ea maemo a mocheso tlas'a maemo a joalo.Le hoja li-additives tsa methylhydroxyethylcellulose ether hajoale li nkoa e le tsona tse ka pele ho nts'etsopele ea theknoloji, ho itšetleha ha tsona ka mocheso ho ntse ho ka lebisa ho fokotseng thepa ea seretse se omeletseng.Le hoja tekanyo ea methylhydroxyethylcellulose (Xia formula) e ile ea eketseha, ts'ebetso ea ts'ebetso le khanyetso ea crack e ntse e sa khone ho finyella litlhoko tsa tšebeliso.Ka liphekolo tse ling tse khethehileng, tse kang ho eketsa tekanyo ea etherification, joalo-joalo, MC e ka boloka metsi a betere ka mocheso o phahameng, kahoo e fana ka ts'ebetso e ntlafetseng tlas'a maemo a thata.
Nako ea poso: Feb-06-2024