I-Hydroxypropyl methylcellulose (HPMC), njengenye yezona ethers zibalulekileyo ze-cellulose kwiinkqubo zanamhlanje zodaka oluxutywe ngokufanelekileyo, idlala indima engenakutshintshwa kwizincamathelisi zethayile. Ngokwanda kobukhulu beethayile, ubunzima beendawo zokwakha, kunye nokuphuculwa okuqhubekayo kwemigangatho yamandla okubopha, umsebenzi we-HPMC kwifomyula uba ngowona ubalulekileyo. Nokuba zizincamathelisi zethayile zohlobo lwe-C1/C2 okanye iinkqubo zokuncamathelisa ezisebenzayo kakhulu zeethayile ezinzima, iithayile ezinkulu, kunye neethayile ezifunxa amanzi amaninzi, i-HPMC idlala indima ebalulekileyo ekuphuculeni ukusebenza kakuhle, ukuphucula ukuqina, kunye nokwandisa amandla okubopha.
1. Ukuphucula Ukugcinwa Kwamanzi Ukuqinisekisa Ukufuma Okwaneleyo
Izincamathelisi zethayile ziimortar ezinomgangatho obhityileyo, ezinobukhulu obuqhelekileyo be-3–5 mm. Zisengozini enkulu yokulahleka kwamanzi ngokukhawuleza ngenxa yokufunxwa kwamanzi ngokukhawuleza yi-substrate, ubushushu obuphezulu, okanye ukomiswa ngumoya.
I-HPMC ivala amanzi akhululekileyo ngempumelelo ngokwenza isakhiwo senethiwekhi esixineneyo kwi-motar, nto leyo ephucula kakhulu izinga lokugcina amanzi kwi-adhesive yethayile. Ngokwesiqhelo, i-HPMC esemgangathweni ophezulu inokufikelela kwinqanaba lokugcina amanzi eliyi-90%–98%.
Iziphumo zokugcina amanzi ziquka:
Ukucothisa izinga lokufuma kwesamente, ukuphucula amandla okubopha;
Ukuthintela ukulahleka kwamanzi kwangethuba, ukuqhekeka, kunye nokuqhekeka kwamanzi;
Ukuphucula ukuzinza kokunamathela kweethayile kwiithayile ezingafunxwa ngamanzi amaninzi (ezifana neethayile zeporcelain kunye neethayile ezicwebezelayo).
2. Ukuphucula iiProperties zeRheological kunye nokuphucula ukusebenza kakuhle
Ukusebenza kakuhle luphawu olubalulekileyo lokuba ingaba i-adhesive yethayile iya kwamkelwa na ngamaqela okwakha. I-HPMC iphucula kakhulu iipropati ze-rheological ze-mortar, inika i-adhesive yethayile ukusasazeka ngcono kunye ne-thixotropy.
Iimpawu eziphambili ze-rheology ephuculweyo:
I-thixotropy elungileyo: Inciphisa uboya, kulula ukubusasaza; ilulama ngokukhawuleza emva kokuba ime, ayijiki.
Ukuthamba okuphuculweyo: Kwenza kube lula ukutshaya itroweli, kuphucula ukusebenza kakuhle kokwakha.
Ukuphucula ukufana kwentlama kunye nokuzinza: Kuthintela ukuqhekeka kwesamente, ukwahlulwahlulwa, kunye nokopha.
Kwiitayile ezinkulu kunye nokwakhiwa kweetayile zodonga ezinemithwalo ephezulu, iipropati ze-thixotropic ze-HPMC zibaluleke kakhulu, zithintela ukutyibilika kweetayile kwaye ziphucula ukusebenza okungatyibilikiyo kwiindawo ezithe nkqo.
3. Ixesha Elivulekileyo Eliphuculweyo kunye Nexesha Lokulungisa
Kwindlela yanamhlanje yokwakha i-adhesive yethayile, ukwandisa ixesha lokuvula kuphucula ukusebenza kakuhle kwethayile kwaye kunciphisa ukuphinda kusetyenziswe.
I-HPMC iyalibazisa ukufuma kwamanzi kumphezulu we-mortar, igcina i-mortar imanzi kwaye inika abasebenzi ixesha elingakumbi lokugqiba ukubeka nokulungisa.
Iziphumo eziqhelekileyo:
Ixesha lokuvula lingandiswa libe yimizuzu engama-20-30.
Ixesha elongezelelekileyo lokulungisa lenza kube lula ukubeka iithayile ezinkulu.
I-HPMC sisongezelelo esibalulekileyo kwiiglu zethayile ezisebenza kakuhle zohlobo lwe-C2 ezifuna ixesha elide zivuliwe.
4. Ukomelela Okuphuculweyo Kokubopha kunye Nokuzinza Kwesakhiwo
I-HPMC ayisiyo "i-binder" ngokwengqiqo yeekhemikhali, kodwa iphucula kakhulu amandla okubopha kwee-adhesive zethayile ngokuphucula inkqubo yokufunxa isamente, ukwenza ngcono ulwakhiwo lwesamente, kunye nokwandisa uxinano lwesamente.
Uphuculo luquka:
Ukugcinwa kwamanzi kukhuthaza ukufuma okupheleleyo, ngaloo ndlela kudala iimveliso ezininzi zejeli ze-CSH.
Iphucula ulwakhiwo lwesamente kwaye iphucula amandla okubopha phakathi kwe-interfacial.
Ithintela izithuba eziphakathi kobuso kwaye iphucula umgangatho wokubopha kunye nokuqina.
Isiphumo sayo sibonakala ngakumbi ekudibaneni kweethayile ezine-vitrified kunye neethayile ezifunxa amanzi kancinci.
5. Ukumelana nokutyibilika okuphuculweyo kunye nokumelana nokuwa
Ukumelana nokutyibilika ngexesha lokufakwa kwethayile ethe nkqo luphawu olubalulekileyo lwezinto zokuncamathelisa iithayile.
Iipropati eziphezulu ze-thixotropic ze-HPMC zivumela i-adhesive yethayile ukuba ikwazi ukuphinda ifumane amandla okwakha ngokukhawuleza emva kokusetyenziswa, nto leyo ethintela iithayile ukuba zingatyibiliki ngenxa yobunzima bazo.
Ingakumbi ekwakhiweni kweethayile ezinkulu kunye neethayile ezinkulu eziglasiweyo, i-HPMC enobungqindilili obuphezulu, efakwe endaweni efanelekileyo ibalulekile ekuthinteleni ukutyibilika.
6. Iingcebiso zokukhetha i-HPMC Dosage kunye ne-Viscosity
Kwiifomyula ze-adhesive zethayile, ubungakanani be-HPMC buhlala buphantsi, kodwa impembelelo yayo ibalulekile.
Isixa esiqhelekileyo sokongeza: 0.2%–0.4%
Ubungakanani obuthile buxhomekeke kuhlobo lwesamente, umlinganiselo wokugcwalisa, indawo yokwakha, kunye nobukhulu beethayile. Iingcebiso zeViscosity (25°C, isisombululo se-2%):
Iglu yethayile eqhelekileyo yohlobo lwe-C1: 40,000–60,000 mPa·s
Iglu yethayile yohlobo lwe-C2 esebenza kakuhle: 75,000–100,000 mPa·s okanye ngaphezulu
I-adhesive yethayile kwiithayile ezinkulu: ≥100,000 mPa·s, umgangatho ophezulu we-thixotropic
I-HPMC, njengesixhobo esibalulekileyo esisebenzayo kwiinkqubo zokuncamathelisa iithayile, inika iingenelo zobugcisa ezibanzi ekuphuculeni ukugcinwa kwamanzi, i-rheology, amandla okubopha, kunye nokumelana nokutyibilika. Nokuba kukufakelwa iithayile zodonga nomgangatho oqhelekileyo okanye ukusetyenziswa kweethayile ezinkulu, ukukhethwa kunye nokusetyenziswa kwe-HPMC esemgangathweni kubalulekile ukuqinisekisa ukusebenza okuzinzileyo kokuncamathelisa iithayile kunye nomgangatho wokwakha othembekileyo. Kubavelisi be-tile adhesive abafuna ukusebenza okuphezulu, ukukhetha umgangatho ofanelekileyo we-HPMC kubalulekile.
Ixesha leposi: Disemba-11-2025