Kahong ea sejoale-joale, likhomaretsi tse kopaneng li phetha karolo ea bohlokoa ho netefatsa ho tšoarella, ho feto-fetoha ha maemo le ho hanyetsa metsi ha manonyeletso a moaho. Ho sa tsotellehe hore na li sebelisoa ho li-drywall systems, manonyeletso a lithaele, kapa li-cementitious applications, li-adhesives tse kopanetsoeng li tlameha ho finyella litekanyetso tse thata tsa ts'ebetso. Keketso e 'ngoe e fumaneng tlhokomelo e ntseng e eketseha tšimong ena keMHEC (Methyl Hydroxyethyl Cellulose), ether ea cellulose e seng ionic e tsejoang ka ho tiea, ho boloka metsi, le thepa ea ho etsa lifilimi.
MHEC ke Eng?
MHEC ke motsoako oa cellulose o fetotsoeng ka lik'hemik'hale o tsoang ho cellulose ea tlhaho. E sebelisoa haholo linthong tsa kaho ka lebaka la bokhoni ba eona ba ho:
Eketsa viscosity le bokhoni ba ho sebetsa
Ntlafatsa ho boloka metsi
Tsitsisa mekhoa ea ho hasana
Ntlafatsa momahano le momahano
Etsa filimi e tsitsitseng, e tenyetsehang
Mehaho ena e etsa hore MHEC e be ea bohlokoa ea ho fetola rheology ka samente-based, gypsum-based, le polymer-modified adhesive systems.
Karolo ea MHEC ho Li-Adhesives tse Kopanetsoeng
Likhomaretsi tse kopantsoeng-tse sebelisetsoang ho tlatsa, ho tiisa le ho kopanya lihokelo pakeng tsa thepa ea mohaho-li hloka ho tsitsisa ho hoholo, ho sebetsa le ho sebetsa nako e telele. MHEC e ntlafatsa likhomaretsi tse kopaneng ka mekhoa e mengata ea bohlokoa:
1. Mosebetsi o Ntlafetseng le Bonolo ba Kopo
MHEC e ntlafatsa haholo ts'ebetso ea li-adhesive tse kopanetsoeng ka ho eketsa viscosity le ho fana ka khanyetso e ntle ea ho thella nakong ea kopo. Sena se lumella:
Ho thella kapa ho phopholetsa
Sekhomaretsi se hasana ka mokhoa o tšoanang ho pholletsa le bokaholimo ntle le ho thella kapa ho rotha, esita le manonyeletsong a emeng.
Nako e ntlafalitsoeng ea lisebelisoa
MHEC e liehisa mouoane oa metsi, e fana ka nako e eketsehileng e bulehileng ea ho sebetsa thepa.
E fokotsehile khanyetso ea ho hula
Sena ke sa bohlokoa ka ho khetheha ha u sebelisa mechine kapa lisebelisoa tsa letsoho ha u qeta ho kopanya li-drywall, tse lebisang ho fokotsa mokhathala oa mosebetsi.
2. Ho Boloka Metsi le Taolo ea ho Fella
E 'ngoe ea menehelo ea bohlokoa ka ho fetisisa ea MHEC ke bokhoni ba eona ba ho boloka metsi ka har'a matrix a khomarelang. Mosebetsi ona oa ho boloka metsi:
E netefatsa metsi a nepahetseng a samente kapa li-binder tsa gypsum
E thibela ho omella kapa ho omella pele ho nako
E tšehetsa phekolo e matla ea ka hare, e hlahisang matla a molemo a mochine
Libakeng tse chesang kapa tse omeletseng, moo mouoane o potlakileng o ka senyang nts'etsopele ea maqhama 'me oa baka ho phatloha, matla a ho boloka metsi a MHEC a ba a bohlokoa le ho feta.
3. Khanyetso ea Sag holim'a Libaka Tse Otlolohileng
Likhomaretsi tse kopanetsoeng li atisa ho sebelisoa ho manonyeletso a holimo kapa a holimo (mohlala, maboteng le holim'a siling), ho etsa hore ho hanyetsa ha sag ho be bohlokoa. MHEC e eketsa ts'ebetso ea anti-sag ka ho matlafatsa thixotropy (boitšoaro ba ho kuta) ea sebopeho.
Ha ho kuta ho sebelisoa (troweling kapa spraying), sekhomaretsi se fetoha mokelikeli.
Ha ho kuta ho tlosoa (ka mor'a kopo), viscosity e hlaphoheloa kapele, e lumellang thepa hore e lule e le teng ntle le ho phalla kapa ho rotha.
Pholiso ena ea "viscosity" e "bohlale" ke phaello e ikhethang ea MHEC, haholo-holo lits'ebetsong tse fetotsoeng ka polymer.
4. Matla a Bond le Momahano
Le hoja MHEC ka boeona e se sekhomaretsi, e thusa ho kopanngoa ha ka hare le ho kopanya sefahleho ka ho ntlafatsa rheology ea tsamaiso. Kabo ea eona e ntle le ho lumellana le likarolo tse ling e lumella:
Homogeneous particle dispersion
Ho emisoa ha li-filler ho ntlafalitsoe
Karohano e fokolang kapa ho tsoa mali
Sena se fella ka filimi e tsitsitseng e nang le mekhoa e metle ea mochine, haholo-holo matla a ho kuta le ho khomarela ka thata holim'a likaroloana tse tloaelehileng tse kopanetsoeng joaloka gypsum board, boto ea samente le konkreite.
5. Ntlafatso ea Crack Resistance le Flexibility
Ho fokotseha le ho phunyeha ke mathata a tloaelehileng a likhomaretsi tse kopanetsoeng. Ka ho boloka mongobo le ho etsa filimi e tenyetsehang, MHEC:
E fokotsa tsitsipano ea holim'a metsi le khatello ea kelello ka hare
E fokotsa ho petsoha nakong ea ho omisa kapa ho phekola
E fana ka tekanyo ea ho hlaphoheloa ha elastic ho amohela motsamao o monyane oa substrate
Sena se etsa hore e be e loketseng ka ho khetheha bakeng sa ho sebelisoa ka metsoako e kopanetsoeng e pepesehileng ho fapana ha mocheso le ho sisinyeha ha mechine.
6. Ho lumellana le li-Additives le Polymer Systems
Likhomaretsi tsa sejoale-joale tse kopaneng hangata li kenyelletsa li-polymer powders (RDPs), li-filler, li-retarders, le lisebelisoa tse ling tse ntlafatsang ts'ebetso. MHEC e sebetsa ka kopanelo le metsoako ena:
Ka li-RDPs: MHEC e tsitsisa li-emulsion mme e ntlafatsa bokhoni ba ho etsa filimi ea polymer.
Ka li-fillers: E boloka likaroloana tse boima li emisitsoe, ho thibela sedimentation le ho netefatsa motsoako o tšoanang.
Tšebelisano ena e tiisa bophelo bo tsitsitseng ba lishelefo, ho kopanya habonolo, le ts'ebetso e tsitsitseng.
7. Optimized Setting Nako le Pholiso Control
Ka metsoako e kopantsoeng ea gypsum, MHEC e ka fetola nako ea ho beha nako ka ho fokotsa tahlehelo ea metsi. Sena se fana ka:
Ho feto-fetoha ha maemo bakeng sa lihlopha tsa ho kenya
Kotsi e fokotsehileng ea ho thatafala pele ho nako
Boleng bo ntlafetseng ba ho qetela holim'a mekhahlelo e mengata
Ho feta moo, sebaka sena se laoloang se lumella masiba a sa tsitsang le ho tsoakana ho pholletsa le manonyeletso, ho ntlafatsa botle ba ho qetela.
Mehlala ea Tšebeliso
Likhomaretsi tse ntlafalitsoeng tsa MHEC li sebelisoa haholo ho:
Lits'ebetso tsa Drywall: Bakeng sa ho kopanya liboto tsa gypsum le li-seams tsa ho theipi
Ho kenya lithaele le majoe: Moo li-filler tse kopanetsoeng li tlamehang ho hanela ho kena ha metsi le ho phunyeha
EIFS (External Insulation Finishing Systems): Ho tiisa manonyeletso le ho fana ka thibelo e hanyetsanang le boemo ba leholimo
Lintho tse entsoeng ka konkreite: Ho tlatsa manonyeletso a katoloso le mefokolo e nyane
Ketsahalong e 'ngoe le e' ngoe, MHEC e ntlafatsa ho sebetsana, ho tlamahane le ho tšoarella, ho fokotsa tlhokahalo ea ho sebetsa hape kapa tlhokomelo.
Tekanyo le Khetho
Mofuta le litekanyetso tsa MHEC tse sebelisitsoeng li ipapisitse le sebopeho le ts'ebeliso e reriloeng:
Viscosity range: Ka tloaelo ho tloha 25,000 ho isa 100,000 mPa·s (Brookfield RV, 2% metsing, 20°C)
Tekanyetso e khothalelitsoeng: Hoo e ka bang 0.2-0.7% ka boima ba motsoako o omileng, empa sena se fapana ho latela mofuta oa setlamo, maemo a leholimo, le ts'ebetso e lakatsehang.
Boholo ba likaroloana: Limaraka tse holimo li qhalana ka potlako 'me li ratoa ho lihlahisoa tse seng li lokisitsoe
Mehopolo ea Tikoloho le Polokeho
MHEC ke:
Ha e na chefo ebile e ka senyeha
Ho bolokehile ho sebetsana le taolo e fokolang ea lerole
E tsitsitse tlasa maemo a fapaneng a pH (4-9)
Tšebeliso ea eona e kenya letsoho ho hlahisa mekhoa e tala kaha e tsoa ho selulose e nchafalitsoeng 'me e tšehetsa lihlahisoa tse tlaase tsa VOC ha li kopantsoe le li-binders tse thehiloeng metsing.
MHEC e bapala karolo ea bohlokoa ho ntlafatseng ts'ebetso ea likhomaretsi tse kopaneng ho pholletsa le mefuta e mengata ea litsamaiso tsa kaho. Ho tloha ho matlafatseng bokhoni ba ho sebetsa le ho hanyetsa ho fokotseha ho ea ho matlafatso ea ho boloka metsi le ts'ebetso ea ts'ebetso, melemo ea eona e nang le mesebetsi e mengata e etsa hore e be tlatsetso ea mantlha mekhoeng ea sejoale-joale. Ha maemo a meaho a ntse a fetoha 'me a batla thepa e sebetsang hantle, e tšoarellang, le e tšoarellang, karolo eaMHEC ka li-adhesives tse kopanetsoeng e tla tsoela pele ho hōla feela. Bakeng sa bahlahisi le lihahi ka mokhoa o ts'oanang, ho utloisisa le ho sebelisa thepa ea MHEC ho fana ka monyetla oa ho fana ka litharollo tse phahameng tsa kaho.
Nako ea poso: Jul-18-2025