Ho aha bothata ba ho beha sekhomaretsi - hydroxypropyl methyl cellulose

Selelekela:
Sebakeng sa thepa ea kaho le ea moaho, metsoako ea sekhomaretsi e phetha karolo ea bohlokoa ho ts'oaraneng meaho. Har'a tsena, hydroxypropyl methyl cellulose (HPMC) e hlahella e le karolo e feto-fetohang le e sebelisoang haholo mekhoeng e fapaneng ea sekhomaretsi. Ho utloisisa thepa ea eona, ts'ebeliso le liphephetso tse amanang le ts'ebeliso ea eona ho aha sekhomaretsi ho bohlokoa bakeng sa ho fihlela meaho e tšoarellang le e tsitsitseng.

Ke engHydroxypropyl Methyl Cellulose (HPMC)?
Hydroxypropyl methyl cellulose, eo hangata e khutsufatsoang joalo ka HPMC, ke polima e entsoeng ka metsi e tsoang ho selulose. E entsoe ka phetoho ea lik'hemik'hale ea cellulose, polysaccharide ea tlhaho e fumanehang maboteng a lisele tsa limela. Phetoho e kenyelletsa ho hlahisoa ha lihlopha tsa hydroxypropyl le methyl mokokotlong oa cellulose, e leng se hlahisang motsoako o nang le thepa e ikhethang e loketseng lits'ebetso tse fapaneng.

Thepa le Litšobotsi tsa HPMC:

Ho qhibiliha ha Metsi: E 'ngoe ea litšobotsi tse hlalosang HPMC ke ho qhibiliha ha eona ka metsi. Ha e kopantsoe le metsi, HPMC e etsa tharollo e hlakileng, e hlakileng, e etsang hore ho be bonolo ho kenyelletsa metsoako ea metsi e kang li-adhesives.
Bokhoni ba ho Etsa Lifilimi: HPMC e na le bokhoni ba ho etsa lifilimi tse tenyetsehang le tse momahaneng ha li omisoa. Thepa ena e na le molemo ka ho khetheha lits'ebetsong tsa sekhomaretsi, moo ho batloang tlamo e matla le e ts'oanang.
Ho khomarela le Khokahano: HPMC e bonts'a thepa ea sekhomaretsi le e momahaneng, e e nolofalletsang ho khomarela likaroloana tse fapaneng ha e ntse e boloka matla a ka hare ka har'a lera la sekhomaretsi.
Taolo ea Rheological: HPMC e sebetsa e le mofetoleli oa rheology mekhoeng ea likhomaretsi, e susumetsang viscosity, boitšoaro ba phallo, le thixotropy. Sena se lumella taolo e nepahetseng holim'a litšoaneleho tsa kopo le ho netefatsa hore ho behiloe ka mokhoa o nepahetseng nakong ea kaho.
Lits'ebetso tsa HPMC ho aha Sekhomaretsi Layering:
HPMC e fumana ts'ebeliso e atileng indastering ea kaho, haholo ha ho etsoa likhomaretsi tsa meaho bakeng sa merero e fapaneng:

Likhomaretsi tsa Lithaele:HPMCke karolo ea bohlokoa ho li-adhesives tsa lithaele, moo e sebetsang e le setlamo, e fana ka ho khomarela pakeng tsa lithaele le li-substrates. Lintho tsa eona tsa ho etsa lifilimi li kenya letsoho ho thehoeng ha maqhama a tšoarellang a khonang ho mamella khatello ea mechine le maemo a tikoloho.
Li-Renders le Li-plaster tsa Samente: Likarolong tsa samente le li-plaster, HPMC e sebetsa e le ntho e matlafatsang le thuso ea ho boloka metsi. E matlafatsa ts'ebetso, e ntlafatsa ho khomarela li-substrates, 'me e thibela ho fokotseha kapa ho phunyeha nakong ea kopo le ho omisa.
Metsoako e Kopanetsoeng le Li-Sealants: Metsoako le li-sealants tse thehiloeng ho HPMC li sebelisetsoa ho tlatsa likheo, mapetsong le manonyeletso a thepa ea kaho. Meetso ena e fana ka ho khomarela hantle, ho tenyetseha, le ho tšoarella, ho netefatsa litiiso tse tšoarellang nako e telele le ho qeta.
EIFS Adhesives: Exterior Insulation and Finishing Systems (EIFS) e itšetlehile ka li-adhesives tse nang le HPMC bakeng sa ho kopanya liboto tsa ho pata maboteng a ka ntle. Lera la sekhomaretsi le tlameha ho sebelisoa ka mokhoa o ts'oanang le ka mokhoa o ts'oanang ho etsa bonnete ba hore ho kenella ka mokhoa o nepahetseng le ho hanyetsa boemo ba leholimo.
Mathata a ho Aha Meaho ea Sekhomaretsi ka HPMC:
Leha e na le melemo e mengata, ts'ebeliso ea HPMC ho aha sekhomaretsi layering e ka hlahisa mathata a itseng:

Ho lumellana le Li-additives tse ling: Ho etsa metsoako ea sekhomaretsi hangata ho kenyelletsa ho kenyelletsoa ha lisebelisoa tse fapaneng tse kang li-fillers, plasticizers le dispersants. Ho fihlella tšebelisano lipakeng tsa HPMC le litlatsetso tsena ho bohlokoa ho boloka ts'ebetso ea sekhomaretsi le botsitso.
Nako ea ho Omisa le Sekhahla sa Pheko: Nako ea ho omisa le sekhahla sa pheko ea likhomaretsi tse thehiloeng ho HPMC li ipapisitse le lintlha tse kang mocheso o teng, mongobo le substrate porosity. Kemiso e nepahetseng le taolo ea litekanyetso tsena ke tsa bohlokoa ho thibela ho omisoa pele ho nako kapa ho folisa ho sa lekaneng, ho ka senyang matla a tlamo.
Matla a Bond le Tšireletseho: Le hoja HPMC e fana ka momahano o babatsehang le momahano ho libopeho tsa sekhomaretsi, ho finyella matla a matle a tlamo le ho tšoarella ho hloka ho nahanoa ka hloko ka thepa ea substrate, ho lokisoa ha holim'a metsi, le mekhoa ea kopo. Kamano e sa lekaneng e ka lebisa ho delamination, debonding, kapa hloleha tlas'a mojaro.
Mehopolo ea Tikoloho: Likhomaretsi tse thehiloeng ho HPMC li ka senyeha habonolo maemong a thata a tikoloho joalo ka mongobo o phahameng, mocheso o feteletseng, kapa ho pepesehela mahlaseli a UV. Khetho e nepahetseng ea limaraka tsa HPMC le litlatsetso tsa tlhahiso li ka fokotsa litlamorao le ho ntlafatsa ts'ebetso ea nako e telele.

Hydroxypropyl methyl cellulose (HPMC)e bapala karolo ea bohlokoa ho aheng sekhomaretsi, ho fana ka tekanyo ea matla a sekhomaretsi, ho tenyetseha le ho sebetsa lits'ebetsong tsa kaho. Ka ho utloisisa thepa le liqholotso tse amanang le likhomaretsi tse thehiloeng ho HPMC, lihahi le bahlahisi ba ka ntlafatsa liforomo, ba ntlafatsa ts'ebetso ea bonto, le ho netefatsa bophelo bo bolelele ba meaho e hahiloeng. Ka lipatlisiso tse tsoelang pele le boqapi, HPMC e ntse e le letlotlo la bohlokoa pokellong ea thepa ea kaho, e kenyang letsoho ho elelloeng ha tikoloho e tšoarellang le e tsitsitseng e hahiloeng.