Methylhydroxyethylcellulose (MHEC) e bapala karolo ea bohlokoa ho ntlafatseng ho tsitsa ha putty, thepa e sebelisoang haholo liindastering tse fapaneng ho kenyelletsa kaho, likoloi le tlhahiso.Sengoliloeng sena se fana ka tlhahlobo e tebileng ea thepa ea MHEC le phello ea eona e kholo ntlafatsong ea putty consistency.E hlahloba sebopeho sa lik'hemik'hale, thepa ea 'mele, le mekhoa ea ts'ebetso ea MHEC ka li-putty formulations.
Putty ke thepa e feto-fetohang e sebelisoang haholo ho aha, ho lokisa likoloi, ho etsa le liindasteri tse ling tse fapaneng.Ho tsitsana ha eona ke ntlha ea bohlokoa ho lekanyetseng ts'ebeliso le katleho ea eona lits'ebetsong tse fapaneng.Ho fihlela tumellano e lakatsehang ea putty ho hloka ho sebetsana le liphephetso tse fapaneng joalo ka taolo ea viscosity, ho sebetsa le thepa ea sekhomaretsi.Methylhydroxyethylcellulose (MHEC) e hlaha e le tlatsetso ea bohlokoa e eketsang haholo ho tsitsa ha putty ha e ntse e ntlafatsa litšobotsi tsa eona tsa ts'ebetso.
1. Sebopeho sa lik'hemik'hale le thepa ea 'mele ea MHEC
MHEC ke nonionic cellulose ether e fumanoang ka ho fetola lik'hemik'hale tsa cellulose.E entsoe ka ho arabela selulose ka ethylene oxide le methyl chloride ho hlahisa lihlopha tsa hydroxyethyl le methyl ka har'a ketane e kholo ea cellulose.Tekanyo ea ho kenya sebaka (DS) ea lihlopha tsa hydroxyethyl le methyl e ama haholo thepa ea MHEC, ho kenyelletsa le solubility, viscosity, le boitšoaro ba rheological.
Sebopeho sa limolek'hule tsa MHEC se e fa thepa e ikhethang, e etsa hore e be e loketseng bakeng sa mefuta e fapaneng ea likopo, ho kenyelletsa le li-putty formulations.MHEC e na le ho qhibiliha ha metsi ka mokhoa o babatsehang 'me e etsa tharollo e hlakileng le e tsitsitseng ha e qhalakanngoa ka metsing.Sebopeho sena sa solubility se thusa ho ajoa ka har'a putty matrix, ho netefatsa ts'ebetso e tsitsitseng ho tloha ho sehlopha ho ea ho se seng.
MHEC e fana ka boitšoaro ba pseudoplastic rheological ho li-putty formulations, ho bolelang hore viscosity ea eona e fokotseha ka sekhahla sa ho kuta.Thepa ena ea rheological e ntlafatsa ts'ebetso ea putty, boiketlo ba ts'ebeliso le sebopeho, ha e ntse e boloka ho hanyetsa sag ho lekaneng le boitšoaro ba thixotropic.
MHEC e na le thepa e babatsehang ea ho etsa lifilimi, e thusa ho ntlafatsa matla a ho kopanya le ho khomarela putty sebakeng sa substrate.Bokhoni ba eona ba ho etsa lifilimi bo theha mokoallo o sireletsang, ho matlafatsa nako e telele le ho hanyetsa boemo ba leholimo, ho etsa hore putty e loketse lits'ebetso tsa kantle.
2. Mokhoa oa ts'ebetso oa MHEC ka li-putty formulations
Karolo ea MHEC ho ntlafatsa ho tsitsa ha putty e na le likarolo tse ngata 'me e kenyelletsa mekhoa e mengata ea liketso e susumetsang litšobotsi tsa eona tsa rheological le tshebetso.
Mokhoa o mong oa mantlha ke hydration le ho ruruha ha limolek'hule tsa MHEC ka har'a li-putty formulations tse thehiloeng metsing.Ha e qhalakanngoa ka metsing, liketane tsa MHEC li hydrate, e leng se etsang hore ho thehoe marang-rang a hydrated polymer ka har'a matrix a putty.Sebopeho sena sa marang-rang se fana ka viscosity ea putty le boitšoaro ba pseudoplastic, e lumellang hore e phalle habonolo tlas'a khatello ea ho kuta ha e ntse e boloka sebopeho sa eona se tsitsitseng le bonngoe.
MHEC e sebetsa e le motenya ka ho eketsa viscosity ea karolo ea metsi ka foromo ea putty.Mofuta oa hydrophilic oa MHEC o khothalletsa ho boloka metsi, ho thibela ho fetoha mouoane ho feteletseng le ho omisa ha putty nakong ea kopo.Bokhoni bona ba ho ts'oara metsi bo eketsa nako e bulehileng ea putty, ho e fa nako e lekaneng ea ho sebetsa pele e beha, ho eketsa maemo a ts'ebeliso le ho fokotsa litšila tsa thepa.
MHEC e sebetsa e le se tlamang le ho tsitsisa linthong tse entsoeng ka putty.Ka ho theha maqhama a haedrojene le likarolo tse ling tse kang li-filler, li-pigments le li-polymers.Litšebelisano tsena li khothaletsa ho ts'oana le ho hasana ka mokhoa o ts'oanang ha li-additives ka har'a matrix a putty, ka hona ho ntlafatsa thepa ea mochini, ho tsitsa ha mebala le ts'ebetso ka kakaretso.
MHEC e kenya letsoho boitšoarong ba thixotropic ba putty, ho bolelang hore e bonts'a viscosity e phahameng ho phomola le viscosity e tlase tlas'a khatello ea ho kuta.Thepa ena e nolofalletsa ts'ebeliso e bonolo le ho hasana ha putty ha e ntse e thibela ho putlama kapa ho putlama libakeng tse otlolohileng.Sebopeho sa thixotropic sa li-putty formulations tse nang le MHEC li tiisa ho koaheloa ka mokhoa o nepahetseng le ho tšoana ha lihlopha tse sebelisitsoeng, ka tsela eo ho matlafatsa aesthetics le holimo holimo.
3. Lintlha tse amang putty consistency le karolo ea MHEC
Ho na le lintlha tse ngata tse amang botsitso ba liforomo tsa putty, ho kenyelletsa le mofuta le boleng ba lisebelisoa tse tala, liparamente tsa foromo, maemo a ts'ebetso le maemo a tikoloho.MHEC e bapala karolo ea bohlokoa ho sebetsana le lintlha tsena le ho ntlafatsa botsitso ba putty ho fihlela litlhoko tse ikhethileng tsa ts'ebetso.
Ntho ea bohlokoa ke boholo ba likaroloana le kabo ea li-filler le li-pigments ka har'a sebopeho sa putty.Likarolo tse ntle li atisa ho eketsa viscosity le thixotropy, ha likaroloana tse mahoashe li ka fokotsa phallo le ho tšoana.MHEC e thusa ho fokotsa litaba tsena ka ho khothalletsa ho hasana ho tšoanang le ho emisoa ha likaroloana ka har'a matrix a putty, ho netefatsa viscosity e tsitsitseng le boitšoaro ba rheological.
Likarolo le ho lumellana ha likarolo tse fapaneng ka foromo ea putty le tsona li ama botsitso le ts'ebetso ea putty.MHEC e sebetsa e le motlatsi le rheology modifier, e khothalletsang ho kopanngoa ha li-additives tse fapa-fapaneng tse kang li-resin, li-plasticizer le li-rheology modifiers.Mehaho ea eona e feto-fetohang e lumella baetsi ba lihlahisoa ho ikamahanya le maemo le ho hlophisa hantle thepa ea rheological ea putty ho latela litlhoko tse khethehileng tsa kopo.
Mekhoa ea ts'ebetso e kang ho kopanya lebelo, mocheso, le sekhahla sa ho kuta li ka ama ho hasana le ho sebelisana ha MHEC ka li-putty formulations.Ho ntlafatsa litekanyo tsena ho tiisa hore ho na le metsi a nepahetseng le ho sebetsa ha limolek'hule tsa MHEC, ho eketsa liphello tsa tsona tse teteaneng, tse tsitsitseng le tse tlamang.
Ntle le moo, maemo a tikoloho a joalo ka mongobo, mocheso le thepa ea bokaholimo ba substrate le ona a ka ama ts'ebeliso le boits'oaro ba ho folisa ba putty.MHEC e ntlafatsa ho boloka metsi le thepa ea ho khomarela ea putty, e etsa hore e tšoanele maemo a fapaneng a tikoloho le lisebelisoa tsa substrate.
4. Mekhoa ea ts'ebeliso le lintlha tsa litekanyetso
Tšebeliso e sebetsang ea MHEC ho li-putty formulations e hloka hore ho nahanoe ka hloko mekhoa ea ts'ebeliso le litekanyetso tsa litekanyetso ho finyella ho lumellana ho lakatsehang le litšobotsi tsa tshebetso.Mekhoa e nepahetseng ea ho kopanya, ho sebelisa le ho folisa ke ea bohlokoa ho netefatsa hore ho ajoa ka mokhoa o ts'oanang le ts'ebetsong ea MHEC ka har'a matrix a putty.
Nakong ea ntlafatso ea tlhahiso, ke habohlokoa ho fumana palo e nepahetseng ea MHEC ho latela litlhoko tse khethehileng tsa ts'ebetso tse kang viscosity, sag resistance, le nako ea ho omisa.Palo ea MHEC e sebelisitsoeng e ka fapana ho latela lintlha tse kang mofuta oa putty, mokhoa oa kopo, maemo a substrate le maemo a tikoloho.
Ho itšetlehile ka mofuta oa substrate, sephetho se lakatsehang holim'a metsi le litlhoko tsa morero, mekhoa e fapaneng ea ho haha e ka sebelisoa, ho kenyelletsa le ho phunya ka letsoho, ho fafatsa le extrusion.Li-putty formulations tse nang le MHEC li bonts'a tšebelisano e ntle haholo le mekhoa e fapaneng ea ts'ebeliso, e lumellang ho feto-fetoha ha maemo le ho feto-fetoha ha tšebeliso.
Nako ea poso: Feb-28-2024