1. Kakaretso ea HPMC
Hydroxypropyl methylcellulose (HPMC ka bokhutšoane) ke lintho tse sebelisoang ka tloaelo ho polymer ea tlhaho, e sebelisoang haholo kahong, ho roala, meriana, lijo le masimo a mang. HPMC e fumanoa ka phetoho ea lik'hemik'hale ea selulose ea tlhaho, e na le ho qhibiliha ha metsi le biocompatibility, 'me ha e qhibilihe ka har'a metsoako ea tlhaho. Ka lebaka la ho qhibiliha ha metsi ka mokhoa o babatsehang, ho khomarela, ho teteaneng, ho emisoa le thepa e meng, HPMC e 'nile ea sebelisoa haholo indastering ea kaho, haholo-holo ho sebelisoa ha putty powder.
2. Karolo ea HPMC ka putty powder
Putty powder ke thepa ea mohaho e sebelisetsoang ho phekola lerako, 'me likarolo tsa eona tse ka sehloohong ke li-fillers le li-binders. HPMC, e le setsi se tloaelehileng sa ho thibela metsi le ho boloka metsi, se ka ntlafatsa ka katleho ts'ebetso ea putty powder, haholo-holo ho kenyelletsa lintlha tse latelang:
Thickening effect: HPMC e etsa tharollo ea colloidal ka mor'a ho qhibiliha ka metsing, e nang le phello e matla ea ho teteka, e ka ntlafatsa thepa ea rheological ea putty powder, e etsa hore e be le viscosity e loketseng, e qobe ho ba mosesaane haholo ha e sebelisoa, le ho ntlafatsa boiketlo ba ts'ebetso.
Ntlafatsa ts'ebetso ea kaho: Phello e matla ea HPMC e ke ke ea etsa hore phofo ea putty e se ke ea theoha kapa ea rotha nakong ea ts'ebetso ea kopo, empa hape e ntlafatsa ho khomarela ha putty powder, ho etsa hore ho be bonolo ho sebetsa leboteng, ka tsela eo ho ntlafatsa katleho ea kaho.
Ntlafatsa ho bolokoa ha metsi: HPMC e khona ho boloka metsi ka har'a phofo ea putty le ho fokotsa sekhahla sa mouoane oa metsi. Sena se ka thibela bokaholimo ba phofo ea putty hore bo se ke ba omella kapele, ho netefatsa ts'ebetso ea eona nakong ea kaho, le ho qoba mapetsong le ho tšolloa.
Ntlafatsa ho ama le ho boreleli holim'a metsi: HPMC ha e khone feela ho ntlafatsa ductility ea putty powder, empa hape e ntlafatsa ho bata ha eona, ho etsa hore putty layer e be boreleli, e leng se loketseng mesebetsi e latelang ea ho penta. Nakong ea ts'ebetso ea kaho, HPMC e ka fana ka boreleli bo betere le ho fokotsa tlhahiso ea likoli le lipompong.
Ntlafatsa botsitso ba kaho: Ho eketsoa ha HPMC ho ka ntlafatsa anti-precipitation ea putty powder, ho thibela ho beoa ha likaroloana tse ntle ho eona, le ho netefatsa hore boleng le ts'ebetso ea putty powder e ke ke ea fetoha haholo nakong ea polokelo ea nako e telele.
Ntlafatsa khanyetso ea ho phatloha: Ka ho boloka metsi le phello e teteaneng ea HPMC, khanyetso ea crack ea putty powder e ka ntlafatsoa, mapetsong a leboteng a ka qojoa, 'me bophelo ba tšebeletso bo ka atolosoa.
3. Viscosity e loketseng ea HPMC
Phello ea HPMC ka putty powder e amana haufi-ufi le viscosity ea eona. Khetho ea viscosity e lokela ho khethoa ho latela litlhoko tse khethehileng tsa putty powder le tikoloho ea kaho. Ka kakaretso, viscosity ea HPMC e tloha ho makholo ho isa ho mashome a likete a millipoise (mPa·s), eo har'a eona li-viscosity tse fapaneng li loketseng mefuta e sa tšoaneng ea putty powder le litlhoko tsa kaho.
Low viscosity HPMC (hoo e ka bang 1000-3000 mPa·s): e loketse putty putty e bobebe kapa base putty, haholo-holo e sebelisoang maemong ao ho oona ho hlokahalang metsi a mangata. Viscosity e tlase ea HPMC e ka fana ka ts'ebetso e ntle ea ho roala, ho etsa hore phofo ea putty e be bonolo ho sebetsa, empa ho boloka metsi le ho hanyetsa ho phatloha ho batla ho fokola.
Bohareng ba viscosity HPMC (hoo e ka bang 3000-8000 mPa·s): e loketse liforomo tse tloaelehileng tsa putty powder, tse ka fanang ka ho boloka metsi hantle le ho thibela pula ha li ntse li boloka metsi a mangata. HPMC ea viscosity ena e ke ke ea finyella litlhoko tsa ho roala feela nakong ea kaho, empa hape e thibela ka katleho mathata a kang ho phunyeha le ho oa.
High viscosity HPMC (hoo e ka bang 8000-20000 mPa·s): e loketse likarolo tse teteaneng tsa phofo ea putty kapa liketsahalo tse hlokang phello e matla ea ho teteana. HPMC e phahameng ea viscosity e ka fana ka ts'ebetso e ntlafetseng ea ho roala le ho tsitsisa, 'me e loketse lisebelisoa tsa ho roala tse hlokang ho ama ka matla le ho boreleli, empa hoa lokela ho hlokomeloa hore viscosity e phahameng haholo e ka etsa hore putty phofo e be e hlakileng haholo' me e ama ts'ebetso ea kaho.
Lits'ebetsong tse sebetsang, viscosity e nepahetseng ea HPMC e lokela ho khethoa ho latela boemo ba tšebeliso le mokhoa oa kaho oa putty powder. Ka mohlala, ha bokaholimo ba lerako bo batla bo le thata kapa ho hlokahala meaho e mengata, ho ka khethoa viscosity e phahameng ea HPMC ho matlafatsa ho khomarela le ho hanyetsa ho phatloha ha koae; ha maemong a hlokang metsi a mangata le kaho e potlakileng, ho ka khethoa HPMC ea viscosity e tlase ho isa bohareng.
Hydroxypropyl methylcelluloseke tlatsetso ea bohlokoa ea moaho e ka ntlafatsang haholo ts'ebetso ea kaho, ho boloka metsi, ho khomarela le ho hanyetsa mapheo a putty powder. Ho khetha viscosity e nepahetseng ea HPMC ho bohlokoa bakeng sa ts'ebeliso ea phofo ea putty. Li-viscosity tse fapaneng li ka fetoloa ho latela mofuta oa phofo ea putty, tikoloho ea kaho le litlhoko tsa ts'ebetso. Tlhahisong ea 'nete le kaho, ho laola viscosity ea HPMC ho ka fihlela litlamorao tse ntle tsa kaho le ts'ebetso ea nako e telele. Ka hona, ho ea ka litlhoko tse fapaneng tsa kaho, ho khetha ka mokhoa o utloahalang le ho lokisa viscosity ea HPMC ke mohato oa bohlokoa oa ho netefatsa ts'ebetso le boleng ba putty powder.
Nako ea poso: Mar-25-2025