Hydroxypropyl methylcellulose (HPMC) ke tlatsetso e feto-fetohang e sebelisoang haholo indastering ea kaho, haholo liforomong tsa putty leboteng.HPMC e fana ka melemo e mengata e thusang ho ntlafatsa ts'ebetso le boleng ba lebota la putty.Mona ke melemo e meraro e meholo ea ho sebelisa HPMC leboteng la putty:
Ho boloka metsi le botsitso:
O mong oa melemo ea mantlha ea ho kenyelletsa HPMC ka har'a mabota a putty formulations ke thepa ea eona e ntle ea ho boloka metsi.HPMC ke hydrophilic polymer, ho bolelang hore e na le kamano e matla ea metsi.Ha e kenngoa leboteng la putty, HPMC e etsa filimi e bolokang metsi ho pota-potile likaroloana tsa samente, e thibelang metsi ho tsoa ka potlako nakong ea ho phekola.
Bokhoni ba HPMC ba ho boloka mongobo motsoakong bo na le melemo e mengata bakeng sa lits'ebetso tsa putty leboteng.Pele ho tsohle, e ntlafatsa ts'ebetso ea putty mme e eketsa nako ea eona e bulehileng, e etsa hore ho be bonolo ho jala le ho boreleli holim'a substrate.Sena se molemo ka ho khetheha mererong ea kaho, moo basebetsi ba ka 'nang ba hloka nako e eketsehileng ea ho kenya kopo le ho qeta putty ea lebota pele e qala.
Ntle le moo, matla a ho ts'oara metsi a HPMC a thusa ho ntlafatsa ho khomarela li-putty ho substrate.Ho fumaneha ha nako e telele ha metsi ho tiisa hore ho na le metsi a nepahetseng a likaroloana tsa samente, e leng se etsang hore ho be le maqhama a matla le a nako e telele pakeng tsa putty ea lerako le sebaka se ka tlaase.Sena ke sa bohlokoa bakeng sa ts'ebetso ea nako e telele le botšepehi ba putty ea lebota e sebelisoang.
Ntlafatsa momahano le ho hanyetsa ho senyeha:
HPMC e sebetsa joalo ka sekontiri le se tlamang linthong tse entsoeng ka lebota, e matlafatsang momahano oa thepa.Ho ba teng ha HPMC ho thusa ho boloka bots'epehi le sebopeho sa putty, ho e thibela ho sisinyeha kapa ho putlama ha e sebelisoa libakeng tse otlolohileng.Sena ke sa bohlokoa ka ho khetheha bakeng sa lisebelisoa tse holimo kapa ha u sebetsa maboteng ka li-angles tse fapaneng.
Thepa e teteaneng ea HPMC e thusa ho eketsa botenya le botsitso ba lebota la putty, e e lumellang hore e khomarele substrate ka katleho ntle le ho matha kapa ho rotha.Ka lebaka leo, li-putty tsa lebota tse nang le HPMC li na le khanyetso e phahameng ea ho sag, e netefatsa ts'ebeliso e ts'oanang le e ts'oanang, haholo libakeng tse otlolohileng le tse phahameng.Thepa ena e etsa hore ho be le qetello e boreleli le e khahlehang.
Ntle le moo, momahano o ntlafalitsoeng o fanoeng ke HPMC o thusa lebota la putty hore le hane ho phatloha.Polymer e etsa filimi e feto-fetohang e amohelang metsamao e nyane ka har'a substrate, e fokotsang monyetla oa ho phatloha ha nako.Ena ke ntlha ea bohlokoa ts'ebetsong ea putty ea lerako, kaha mapetsong a ka ama ponahalo le ho tšoarella ha seaparo se sebelisitsoeng.
Matla a matla a ho khomarela le ho kopanya:
Ho khomarela ke ntlha ea bohlokoa ts'ebetsong ea putty ea lebota, e amang ka kotloloho matla a maqhama pakeng tsa putty le substrate.HPMC e bapala karolo ea bohlokoa ho ntlafatseng ho khomarela ka ho etsa filimi e momahaneng le e tenyetsehang e khothalletsang ho khomarela ka matla sefahlehong.
Matla a ho boloka metsi a HPMC a etsa bonnete ba hore metsi a lekaneng a fumaneha bakeng sa hydration ea likaroloana tsa samente, ho khothalletsa ho thehoa ha maqhama a matla pakeng tsa putty ea lerako le substrate.Sena ke sa bohlokoa haholo ha u sebelisa putty libakeng tse porous kapa tse phephetsang, moo ho khomarela hantle ho ka bang thata.
Ho feta moo, HPMC e thusa ho fokotsa shrinkage nakong ea ho omisa le ho folisa ha putty ea lebota.Ho fokotsa shrinkage ho thusa ho boloka kamano pakeng tsa putty le substrate, ho matlafatsa matla a maqhama.Sephetho ke putty ea lebota e khomarelang ka matla holim'a mefuta e sa tšoaneng, e fana ka ts'ebetso ea nako e telele le ho hanyetsa ho peeling kapa delamination.
Hydroxypropyl methylcellulose (HPMC) e fana ka melemo e mengata ea bohlokoa ha e kenyeletsoa ka har'a mabota a putty formulations.Mehaho ea eona ea ho boloka metsi e matlafatsa ts'ebetso le ho khomarela, ha bokhoni ba eona bo tiileng le bo tlamang bo thusa ho ntlafatsa momahano le ho hanyetsa ho sag.Tšebeliso ea HPMC ho li-putty formulations e ka qetella e fane ka indasteri ea kaho ka liphahlo tse tšoarellang haholoanyane, tse ntle le tse sebetsang hantle bakeng sa bokantle ba ka hare le ka ntle.
Nako ea poso: Nov-28-2023