Karolo ea HPMC ho Putty Formulations

Hydroxypropyl methyl cellulose (HPMC) e bapala karolo ea mantlha mekhoeng ea sejoale-joale ea putty mme e nkuoa e le tlatsetso e hlokahalang bakeng sa ho ntlafatsa ts'ebetso, botsitso le ts'ebetso ea nako e telele ea lisebelisoa tsa ho qeta mabota. Ebang e sebelisoa ka hare kapa bokantle ba putty, HPMC e ntlafatsa rheology, ho boloka metsi, boleng ba ho roala, le ho tšoarella. Mesebetsi ea eona e nang le mefuta e mengata e etsa hore e be karolo ea mantlha lits'ebetsong tsa putty tse omeletseng tse thehiloeng holim'a samente, gypsum kapa polymer binders.

1. Ho boloka Metsi: Mosebetsi oa Pele ho Putty Systems

Putty e tlameha ho boloka mongobo o lekaneng nakong ea phekolo ho netefatsa hore samente e kenngoa hantle kapa ho etsoa filimi e lekaneng ea li-polymers. HPMC e ntlafatsa haholo matla a ho boloka metsi ka lebaka la sebopeho sa eona sa limolek'hule tsa hydrophilic le bokhoni ba ho etsa lifilimi.

1.1. Melemo ea ho boloka metsi e ntlafalitsoeng e kenyelletsa:

Ho thibela ho omisa pele ho nako: Ho thibela ho petsoha, ho chokoa kapa ho etsa phofshoana sebakeng se chesang, se nang le moea o matla kapa se monyang haholo.

Ho etsa bonnete ba hore binder hydration: Mongobo o lekaneng o lumella samente kapa gypsum ho tlatsa metsi, e leng ho eketsang ho thatafala ha holim'a metsi le ho khomarela.

Ho ntlafatsa boreleli ba kaho: Mongobo o lekaneng o lelefatsa nako e bulehileng, o thusa ho ts'oara hantle ntle le matšoao a ho hula.

1.2. Tšusumetso e tloaelehileng ea litekanyetso:

0.2-0.5% HPMC e ka phahamisa sekhahla sa ho boloka metsi sa putty ka holimo ho 95%, ho thusa ho fumana pheko e tsitsitseng esita le maemong a thata a tikoloho.

2. Phetoho ea Rheology le Boitšoaro bo Botenya

Karolo e 'ngoe ea bohlokoa ea HPMC ho li-putty formulations ke taolo ea rheology. E lokisa viscosity, polasetiki, le ho hanyetsa ho sag ea pente e metsi, ho netefatsa ts'ebeliso e bonolo le ho khomarela ka mokhoa o tsitsitseng libakeng tse emeng.

2.1.Litšenyehelo tsa bohlokoa tsa rheological:

Viscosity build-up: E netefatsa hore motsoako o na le 'mele o lekaneng hore o ka phatlalatsoa ka mokhoa o ts'oanang.

Ts'ebetso ea anti-sag: E thibela putty hore e se thelle, haholo lits'ebetsong tse teteaneng kapa holim'a siling.

Ho jala ka mokhoa o ts'oanang: Ho ntlafatsa ho utloahala ha thipa, ho lumella sebaka sa ho qetela se boreleli, se tsitsitseng haholoanyane.

Sebopeho se tsitsitseng sa boemo ba metsi: Ho thibela karohano kapa ho tsoa mali a metsi a peista.

2.2.Ho khetha kereiti e nepahetseng ea viscosity:

30,000-60,000 mPa·s: E loketse putty e tloaelehileng

75,000-100,000 mPa·s: E loketse bakeng sa ho hanana le maemo a phahameng a sag kapa metsoako ea bokantle ba putty

Viscosity e nepahetseng e tiisa ho leka-lekana pakeng tsa boiketlo ba ho hasana le ho khomarela ho tsitsitseng leboteng.

3.Ntlafatso ea Ts'ebetso le Ts'ebetso ea Ts'ebetso

Ho sebetsa ke e 'ngoe ea lintho tse ka sehloohong tseo basebelisi ba amehileng ka tsona lihlahisoa tsa putty. HPMC e fana ka lubricity e ntle haholo le ts'ebetso e tsitsitseng, e nolofalletsa lisebelisoa ho li sebelisa.

3.1. Lintlafatso tsa ho sebetsa li kenyelletsa:

Lubricity e ntlafalitsoeng: Trowel e tsamaea hantle ntle le ho khomarela, e fokotsa mokhathala oa basebetsi.

Boemo bo betere: E netefatsa hore sebaka se bataletseng, se ts'oanang se loketse ho penta kapa ho penta wallpaper.

Nako e atolositsoeng ea ho bula: E fana ka nako e eketsehileng ea ho lokisa le ho lokisa bokaholimo nakong ea ts'ebeliso.

Fokotsa lisebelisoa tsa ho hula: E bohlokoa haholo maemong a mocheso o phahameng kapa a omisang ka potlako.

Lintlafatso tsena li eketsa katleho ea kaho ka kotloloho le khotsofalo ea basebelisi.

4. Matla a Tlamahaneng le Botšepehi ba Boholimo

Leha HPMC e se sekhomaretsi sa mantlha, bokhoni ba eona ba ho boloka metsi le ho etsa lifilimi ka tsela e sa tobang bo matlafatsa matla a maqhama lipakeng tsa putty le substrate.

4.1.Melemo ea ho khomarela e kenyelletsa:

hydration e nepahetseng e tiisa nts'etsopele ea maqhama a matla pakeng tsa lisebelisoa tsa samente le lebota.

Lifilimi tsa HPMC li kenya letsoho ho momahaneng holimo, ho thibela lerōle le phofo ea lera le folisitsoeng.

Tekanyo e tsitsitseng ea mongobo e fokotsa ho fokotseha, ho fokotsa likotsi tsa ho senya.

sebaka se nang le metsi hantle se fella ka ho thatafala ho hoholo, ho khomarela ho betere, le ho tšoarella halelele.

5. Nako e Ntlafetseng ea ho Bula le ho sebetsa ka tlas'a maemo a thata

Maemo a tikoloho a na le tšusumetso e kholo ho pholiso ea putty. HPMC e thusa ho netefatsa ts'ebetso e tsitsitseng le maemong a leholimo a thata.

5.1.Melemo ea ts'ebetso:

Mocheso o phahameng: E ​​fokotsa moea oa mongobo 'me e thibela ho hlaha ha filimi pele ho nako.

Mongobo o tlase: E boloka botsitso bo sebetsang ka nako e telele.

Tikoloho e nang le moea o matla: E fokotsa ho honyela ho omileng le kotsi ea ho phatloha.

Botsitso bona bo bohlokoa ka ho khetheha bakeng sa libaka tsa ka ntle tsa putty kapa tse omisang ka potlako moo mathata a boleng a atisang ho hlaha.

6. Ho Ntlafatsa Botsitso ba Lihlahisoa tsa Phofo

Ka putty e omileng, ho fihlella ts'ebetso e tsitsitseng ka mor'a ho boloka nako e telele ke habohlokoa. HPMC e ts'ehetsa botsitso bona ka:

Ho ntlafatsa ho kopanya ho tšoana ha phofo

Ho thibela karohano ea li-filler, samente le li-additives

Ho boloka viscosity e tsitsitseng ka mor'a ho boloka

Ho ntlafatsa ho hasana hape ha metsi a eketsoa

Sena se tiisa hore basebelisi ba ka fumana liphetho tse lebelletsoeng esale pele tsa ho kopanya le ts'ebeliso le kamora likhoeli tse ngata tsa polokelo.

7. Litlhahiso tsa Tekanyo ea Litlhahiso tsa Putty

Tekanyo e hlokahalang e ipapisitse le mofuta oa substrate, maemo a tikoloho le litlhoko tsa ts'ebetso.

Tataiso e akaretsang (ho ea ka boima ba motsoako o omileng):

Ka hare putty: 0.2-0.4%

Li-putty tsa ka ntle: 0.3-0.5%

Libaka tse sebetsang hantle kapa tse mongobo o phahameng: 0.4-0.6%

Viscosity e phahameng ea HPMC e ka lumella litekanyetso tse tlase ka lebaka la ts'ebetso e matla ea ho tenya.

HPMC e bapala karolo ea bohlokoa ts'ebetsong le boleng ba li-putty formulations tsa sejoale-joale. Mesebetsi ea eona ea mantlha––ho kenyeletsa ho boloka metsi, ho laola rheology, ho ntlafatsa ts'ebetso, ho khomarela holim'a metsi, le botsitso ba kaho––susumetsa ka ho toba khotsofalo ea mokopi le ho tšoarella ha nako e telele holim'a metsi. Ka ho khetha boemo bo nepahetseng ba viscosity le litekanyetso, bahlahisi ba ka ntlafatsa haholo ts'ebetso ea boemo bo holimo, khanyetso ea crack, botsitso ba polokelo, le boleng bo felletseng ba lihlahisoa tsa putty. Ha mahlale a kaho a ntse a fetoha, HPMC e tla tsoelapele ho ba tlatsetso ea mantlha, e nolofalletsang tharollo ea boleng bo holimo ea ho qeta mabota lits'ebetsong tsa kahare le kantle.