E phahameng ea viscosity eahydroxypropyl methylcellulose, ho ntlafatsa ts'ebetso ea ho boloka metsi.Viscosity ke parameter ea bohlokoa ea 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 fapane haholo, 'me tse ling li bile li na le phapang habeli.Ka hona, ha u bapisa viscosity, etsa bonnete ba hore u e etsa pakeng tsa mekhoa e tšoanang ea teko, ho kenyelletsa mocheso, rotor, joalo-joalo.
Bakeng sa boholo ba likaroloana, ha karoloana e le ntle, ho boloka metsi ho molemo.Ka mor'a hore likaroloana tse kholo tsa cellulose ether li kopane le metsi, bokaholimo bo qhibiliha hang-hang ho etsa gel, e koahelang thepa 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 index ea bohlokoa ea ts'ebetso ea methyl cellulose ether.MC e sebelisoang bakeng sa seretse sa phofo e omeletseng e hlokeha hore e be phofo, e nang le metsi a tlaase, 'me botle bo boetse bo hloka 20% ho 60% ea boholo ba likaroloana ho ba ka tlase ho 63um.Fineness e ama ho qhibiliha ha hydroxypropyl methylcellulose ether.Coarse MC hangata ke granular, 'me ho bonolo ho qhibiliha ka metsing ntle le agglomeration, empa sekhahla sa ho qhibiliha se lieha haholo, kahoo ha sea lokela ho sebelisoa ka seretse se omileng.Ka seretse sa phofo se omeletseng, MC e hasane har'a lisebelisoa tsa samente tse kang li-aggregates, li-fillers tse ntle le samente.Ke phofo e ntle feela e lekaneng e ka qobang ho kopana ha methyl cellulose ether ha e tsoakoa le metsi.Ha MC e eketsoa ka metsi ho qhaqha li-agglomerate, ho thata ho qhala le ho qhaqha.MC e nang le botle bo bobe ha e senya feela, empa hape e fokotsa matla a sebaka sa seretse.Ha seretse se joalo sa phofo se ommeng se hahoa sebakeng se seholo, lebelo la ho folisa la seretse se omileng sa sebaka seo se fokotseha haholo, 'me ho phunyeha ho etsahala ka lebaka la linako tse fapaneng tsa ho phekola.Bakeng sa seretse sa spray ho sebelisa mohaho oa mechine, ka lebaka la nako e khutšoanyane ea ho susumetsa, ho hlokahala hore ho be le fineness e phahameng.
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 ho phahamisa boima ba limolek'hule tsa MC, ho fokotseha ho lumellanang ha solubility ea eona, e nang le tšusumetso e mpe ho matla le thepa 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 metsi se tla khomarela haholoanyane.Nakong ea kaho, e tla khomarela scraper 'me e be le sekhomaretsi se phahameng ho substrate.Empa e etsa ho fokolang ho eketsa matla a sebopeho sa seretse se metsi ka boeona.Nakong ea kaho, ts'ebetso ea ts'ebetso ea anti-sagging ha e hlake.Ho fapana le hoo, li-ether tse ling tsa methyl cellulose tse nang le viscosity e tlase empa tse fetotsoeng li na le ts'ebetso e ntle haholo ho ntlafatsa matla a sebopeho sa seretse se metsi.
Ha palo ea cellulose ether e eketsoa ka har'a seretse e le kholoanyane, e ntlafatsa ts'ebetso ea ho boloka metsi, e phahamisa viscosity, e ntlafatsa ts'ebetso ea ho boloka metsi.
Botle ba HPMC bo boetse bo na le tšusumetso e itseng ho bolokoeng ha metsi.Ha re bua ka kakaretso, bakeng sa methyl cellulose ethers tse nang le viscosity e tšoanang empa botle bo fapaneng, ha ho e-na le palo e tšoanang ea ho eketsoa, botle bo botle haholoanyane, phello ea ho boloka metsi e betere.
Ho boloka metsi ha HPMC ho boetse ho amana le mocheso o sebelisoang, 'me ho boloka metsi a methyl cellulose ether ho fokotseha ka ho eketseha ha mocheso.Leha ho le joalo, ts'ebetsong ea lisebelisoa tse sebetsang, seretse sa phofo se omeletseng hangata se sebelisoa ho li-substrates tse chesang ka mocheso o phahameng (o ka holimo ho likhato tse 40) libakeng tse ngata, joalo ka bokantle ba lebota la putty plaster tlas'a letsatsi lehlabula, hangata le potlakisa Ho folisa samente le ho thatafala ha seretse. seretse se ommeng.Ho theoha ha metsi ho entse hore ho be le maikutlo a hlakileng a hore bobeli ba ho sebetsa le ho hanyetsa crack ho ameha, 'me ho bohlokoa haholo ho fokotsa phello ea maemo a mocheso tlas'a maemo a joalo.Le hoja methyl hydroxyethyl cellulose ether additive hajoale e nkoa e le eona e ka pele ho nts'etsopele ea theknoloji, ho itšetleha ha eona mochesong ho ntse ho ka lebisa ho fokotseng ts'ebetso ea seretse se omileng.Le hoja palo ea methyl hydroxyethyl cellulose (formula ea lehlabula) e eketsehile, ho sebetsa le ho hanyetsa crack ho ntse ho sa khone ho finyella litlhoko tsa tšebeliso.Ka liphekolo tse ling tse khethehileng, tse kang ho eketsa tekanyo ea etherification, MC e ka boloka phello ea eona ea ho boloka metsi e le betere ho mocheso o phahameng, e le hore e ka fana ka ts'ebetso e ntlafetseng tlas'a maemo a thata.
Nako ea poso: Oct-20-2022