Hydroxypropyl methylcellulose (HPMC) ke tlatsetso e sebelisoang haholo liindastering tse fapaneng ho kenyeletsoa kaho ka lebaka la thepa ea eona e mengata. Lefapheng la tlhahiso ea li-putty, HPMC e bapala karolo ea bohlokoa ho ntlafatsa thepa e kang ts'ebetso ea kaho, ho khomarela, ho boloka metsi le ho hanyetsa crack.
Putty ke thepa e feto-fetohang e sebelisoang haholo kahong ho tlatsa mapatso, maemo a holimo le ho fana ka libaka tse boreleli bakeng sa mabota le siling. Ts'ebetso ea putty e bohlokoa ho fihlela sephetho se lakatsehang mererong ea kaho, ka hona, li-additives li sebelisoa ho ntlafatsa thepa ea eona. Hydroxypropyl methylcellulose (HPMC) e fetohile tlatsetso ea bohlokoa mekhoeng ea li-putty ka lebaka la bokhoni ba eona ba ho fetola rheology, ho ntlafatsa ts'ebetso le ho matlafatsa nako e telele.
1. Kakaretso ea Hydroxypropyl Methylcellulose (HPMC):
HPMC e tsoa ho selulose, e entsoeng ka ho nkela lihlopha tsa hydroxyl tsa cellulose sebaka ka lihlopha tsa methoxy le hydroxypropyl. Phetoho ena ea lik'hemik'hale e fana ka thepa e ikhethang ea HPMC, e etsa hore e qhibilihe haholo metsing 'me e khone ho etsa litharollo tse tsitsitseng tsa colloidal. Tlhahisong ea li-putty, HPMC e sebetsa joalo ka sekontiri, se tlamang, le se bolokang metsi, se amang bocha le ho thatafatsa thepa ea putty.
2. Lintlha tsa Recipe:
Ho kenyelletsa HPMC ho li-putty formulations ho hloka hore ho nahanoe ka hloko lintlha tse kang kabo ea boholo ba likaroloana, litlhoko tsa viscosity, nako ea ho beha, le ho lumellana le lisebelisoa tse ling. Ho khetha kereiti e nepahetseng ea HPMC le ho tsepamisa maikutlo ho bohlokoa ho fihlela tekano e nepahetseng lipakeng tsa ts'ebetso le thepa ea mochini. Ntle le moo, litšebelisano lipakeng tsa HPMC le lisebelisoa tse ling tse kang li-filler, li-pigment le li-disperants li tlameha ho hlahlojoa ho netefatsa hore lia lumellana le ho ntlafatsa ts'ebetso.
3. Tšusumetso ho tšebetsong:
E 'ngoe ea melemo e meholo ea HPMC ho li-putty formulations ke bokhoni ba eona ba ho ntlafatsa ts'ebetso ka ho fetola thepa ea rheological. HPMC e sebetsa joalo ka motenya, e eketsa viscosity ea pente ea putty le ho fokotsa ho sagging kapa ho rotha nakong ea kopo. Thepa ea pseudoplastic ea tharollo ea HPMC e boetse e thusa ho hasana ha bonolo le ho phethoa ka mokhoa o boreleli oa bokaholimo ba putty, ka hona ho matlafatsa ts'ebetso le ts'ebetso ka kakaretso maemong a fapaneng a kaho.
4. Tšusumetso ho thepa ea mochini:
Ho eketsoa ha HPMC ho ka ama haholo thepa ea mochini oa putty, ho kenyelletsa matla a ho khomarela, matla a ho tsitsa le matla a flexural. HPMC e etsa filimi e tšesaane holim'a likaroloana tsa li-filler, tse sebetsang e le sekhomaretsi le ho ntlafatsa ho kopana ha sefahleho pakeng tsa likaroloana. Sena se eketsa momahano ka har'a matrix a putty mme se eketsa khanyetso ea ho peperana le deformation. Ho feta moo, HPMC e thusa ho theha microstructure e teteaneng, ka tsela eo e ntlafatsa thepa ea mochine e kang matla a khatello le ho hanyetsa ho apara.
5. Ntlafatsa ho tšoarella:
Tlhōr HPMC e bapala karolo ea bohlokoa ho matlafatseng ho tšoarella ha li-putty ka ho ntlafatsa ho hanyetsa metsi, ho hanyetsa boemo ba leholimo le ho hanyetsa kholo ea likokoana-hloko. Mofuta oa hydrophilic oa HPMC o o lumella ho boloka mongobo ka har'a matrix a putty, ho thibela ho felloa ke metsi 'meleng le ho fokotsa kotsi ea mapetsong a shrinkage. Ho phaella moo, HPMC e etsa filimi e sireletsang holim'a putty, e thibelang mongobo ho kena le ho hlaseloa ke lik'hemik'hale, kahoo e lelefatsa bophelo ba tšebeletso ea putty.
6. Maikutlo a tikoloho:
Lilemong tsa morao tjena, ho 'nile ha e-ba le thahasello e ntseng e eketseha ea ho etsa thepa ea mohaho e sa silafalitseng tikoloho e fokotsang tšusumetso ea tikoloho. HPMC e fana ka melemo e mengata tabeng ena, kaha e nkiloe mehloling e ka nchafatsoang hape e ka senyeha tlas'a maemo a matle. Ho feta moo, ts'ebeliso ea HPMC ho li-putty formulations e eketsa katleho ea tšebeliso ea thepa le ho fokotsa tlhahiso ea litšila, kahoo e thusa ho baballa matla le lisebelisoa. Leha ho le joalo, phello eohle ea potoloho ea bophelo ea putty e nang le HPMC, ho kenyeletsoa lintlha tse joalo ka lits'ebetso tsa tlhahiso, lipalangoang le ho lahla, e tlameha ho nkuoa e le ho lekola botsitso ba eona ka botlalo.
Hydroxypropyl methylcellulose (HPMC) ke tlatsetso e mengata e sebetsang e ka amang haholo ts'ebetso ea putty lits'ebetsong tsa kaho. Bokhoni ba HPMC ba ho fetola thepa ea rheological, ho ntlafatsa ts'ebetso, ho ntlafatsa thepa ea mochini le ho ntlafatsa ho tšoarella ho thusa nts'etsopele ea li-putty formulations tsa boleng bo holimo tse loketseng litlhoko tse fapaneng. Leha ho le joalo, ho finyella ts'ebetso e nepahetseng ho hloka hore ho hlophisoe ka hloko, ho nahanoa ka lintlha tse kang khetho ea lihlopha, ho lumellana le maemo a tikoloho. Ho hlokahala lipatlisiso tse ling ho hlahloba lits'ebetso tse ncha tsa HPMC mekhoeng ea li-putty le ho rarolla mathata a hlahang mekhoeng e tsitsitseng ea kaho.
Nako ea poso: Feb-22-2024