Li-cellulose ethers ke sehlopha sa li-polymers tse qhibilihang ka metsing tse boima ba molek'hule tse nkiloeng ho selulose. Li 'nile tsa sebelisoa haholo indastering ea kaho e le li-admixtures tse ntlafatsang ts'ebetso bakeng sa lihlahisoa tse thehiloeng ho samente le tsa gypsum. Har'a tsona, hydroxypropyl methylcellulose (HPMC) ke e 'ngoe ea li-cellulose ether tsa bohlokoa ka ho fetisisa bakeng sa putty.
Joaloka moetsi oa HPMC ea hloahloa, re tla u hlalosetsa karolo ea cellulose ether ho putty. Re tšepa hore poso ena e fana ka lintlha tse molemo bakeng sa ba thahasellang sehlooho sena.
1. Ho boloka metsi
E 'ngoe ea mesebetsi e ka sehloohong ea cellulose ether bakeng sa putty ke ho boloka metsi. Putty ke seretse se kang sekontiri se sebelisetsoang ho tlatsa likheo le mapetsong a kang mabota, siling le fatše. Metsi ke motsoako oa bohlokoa ho li-putty formulations hobane a thusa ho qhaqha metsoako le ho fana ka ts'ebetso. Leha ho le joalo, metsi a mangata haholo a ka etsa hore putty e omelle mme e fokotsehe ka potlako, e lebisang ho phunyeha le ho qeta boleng bo tlaase.
Cellulose ether, haholo-holo HPMC, e etsa sebopeho se kang gel ha se kopantsoe le metsi, se ka ntlafatsang ho boloka metsi a putty. Lihlopha tsa hydrophilic tsa HPMC li ka monya limolek'hule tsa metsi 'me tsa li thibela ho fetoha mouoane ka potlako. Tšobotsi ena e lumella nako e telele ea ho sebetsa le mokhoa o tsitsitseng oa putty.
2. Ntlafatsa mokhoa oa ho sebetsa
Mosebetsi o mong oa bohlokoa oa cellulose ether bakeng sa putty ke ho ntlafatsa ts'ebetso ea eona. Ho sebetsa ho bolela boiketlo boo putty e sebelisoang ka eona le ho bōptjoa ho fumana sebaka se boreleli. Cellulose ether e ka ntlafatsa metsi le ho ata ha putty ka ho fokotsa khohlano lipakeng tsa likaroloana le ho eketsa ho tlotsa ha sistimi.
Ho eketsoa ha li-cellulose ethers ho li-putty ho boetse ho fokotsa ho kenngoa ha moea ho bakoang ke ho kopanya, ho ka lebisang libakeng tse sa tsitsang le ho khomarela hampe. Tšebeliso ea li-cellulose ethers e ntlafatsa ho boreleli le ho tsitsisa ha putty, ho fella ka ts'ebetso e ntle ka kakaretso le qetello e ntle haholoanyane.
3. Eketsa ho khomarela
Molemo o mong oa cellulose ether bakeng sa putty ke ho eketseha ho khomarela. Li-putty li sebelisetsoa ho tlatsa likheo le mapetsong, hammoho le ho etsa sebaka se boreleli bakeng sa pente kapa lintho tse ling. Ka hona, putty e tlameha ho khona ho khomarela substrate le ho fana ka tlamo e matla.
Cellulose ether, haholo-holo HPMC, e ka ntlafatsa ho khomarela ha putty ka ho etsa filimi holim'a substrate. Filimi e ntlafatsa kamano pakeng tsa putty le substrate mme e thusa ho tlatsa ho se lekane ha holimo. Sena se fella ka tlamo e matla le ho qeta nako e telele.
4. Fokotsa ho fokotseha
Shrinkage ke bothata bo tloaelehileng ka putty, kaha e ka lebisa ho phunyeha le ho qeta boleng bo tlaase. Cellulose ethers e ka thusa ho fokotsa putty shrinkage ka ho ntlafatsa ho boloka metsi le ho sebetsa ha putty. Metsi a fetoha mouoane butle-butle, a etsa hore putty e be boreleli bo thusang ho thibela mapetsong le mapetsong hore a se ke a hlaha nakong ea ho omisa.
Ho phaella moo, ether ea cellulose e ka boela ea fokotsa shrinkage ea polasetiki ea putty, ke hore, ho fokotseha ho etsahalang nakong ea boemo ba pele. Thepa ena ke ea bohlokoa ka ho khetheha bakeng sa li-putty tse potlakileng, kaha li thusa ho boloka botšepehi ba holim'a metsi le ho thibela ho thehoa ha mapetsong.
5. Ho ntlafala ho tšoarella
Qetellong, li-cellulose ethers li ka ntlafatsa ho tšoarella ha putty ka ho matlafatsa khanyetso ea eona ho maemo a tikoloho joalo ka liphetoho tsa mocheso, mongobo le abrasion. Lintho tse entsoeng ka filimi ea cellulose ether li ka fana ka thibelo e sireletsang holim'a putty ho thibela ho kenella ha metsi le litšila tse ling.
Ho feta moo, cellulose ether e ka boela ea ntlafatsa matla a ho feto-fetoha le ho hanyetsa ha putty, e leng ho etsang hore e se ke ea qhoma le ho petsoha. Thepa ena e bohlokoa haholo bakeng sa lits'ebetso moo li-putty li tšoaroang khafetsa kapa li amehang khafetsa, joalo ka mosebetsing oa ho lokisa kapa likhabisong tsa mokhabiso.
ha re phethela
Qetellong, li-cellulose ethers, haholo-holo HPMC, ke metsoako ea bohlokoa e ntlafatsang ts'ebetso ea putty. Mesebetsi ea bona e kenyelletsa ho boloka metsi, ts'ebetso e ntlafetseng, ho khomarela ho eketseha, ho fokotsa ho fokotseha le ho matlafatsa nako e telele. Ho sebelisa li-cellulose ethers ho thusa ho ntlafatsa boleng ba kakaretso le ts'ebetso ea putty, ho fella ka pheletso e betere le bophelo bo bolelele. Joaloka moetsi oa setsebi oa HPMC, re ikemiselitse ho fa bareki boleng ba boleng bo phahameng ba cellulose ether le tšehetso ea tekheniki.
Nako ea poso: Jul-20-2023