I-HPMC kwi-Tile Adhesives

Tileizinto zokuncamathelisaUninzi lwabantu lukwabizwa ngokuba yi-ceramicizinto zokuncamathelisa iithayile, abo baye baqhagamshelana nokusetyenziswa kwetayile ye-ceramicizinto zokuncamathelisakwigubu layo elichasayo, elincangathi, ulwakhiwo, ukuxhathisa ukwaluphala kunye nezinye iingenelo zibonwa ngokupheleleyo.

Iselulosi etherHPMCnjengesona songezo sibalulekileyo kwiizinto zokuncamathelisa iithayile, izinto zokuncamathelisa iithayileukutsala amandla kunye nexesha lokuvula kunempembelelo enamandla, kwaye ezi zinto zimbini nazo zizibonakaliso ezibalulekileyo zokusebenza okuphezuluizinto zokuncamathelisa iithayile, ngovavanyo lwe-cellulose ether effect kwiizinto zokuncamathelisa iithayileiipropati zashwankathelwa zaze zajongwa kwakhona.

1, intshayelelo

Cement-based ceramicizinto zokuncamathelisa iithayileokwangoku isesona sicelo sikhulu sodaka olukhethekileyo lokuxuba okomileyo, oluluhlobo lwesamente njengeyona nto ingundoqo yesamente kwaye yongezwa ngokuhlelwa kwe-aggregate, i-agent yokugcina amanzi, i-arhente yamandla okuqala, i-latex powder kunye nezinye i-organic or inorganic admixtures. Ngokuqhelekileyo isetyenziselwa ukuxuba amanzi kuphela, xa kuthelekiswa nodaka oluqhelekileyo lwesamente, inokuphucula kakhulu amandla okudibanisa phakathi kwezinto zokugqiba kunye nesiseko sezinto, ine-anti-slip elungileyo kwaye inokumelana nokugqwesa kwamanzi, ukumelana nobushushu kunye neenzuzo zomjikelo wokunyibilika, ezisetyenziswa kakhulu. ukuncamathisela iithayile zodonga lwangaphakathi kunye nangaphandle, iithayile zomgangatho kunye nezinye izinto zokuhombisa, Isetyenziswa ngokubanzi kumhombiso weendonga, imigangatho, amagumbi okuhlambela, iikhikhithi kunye nezinye izakhiwo. Yeyona nto isetyenziswa kakhulu kwi-ceramic tile bonding material.

Ngokuqhelekileyo xa sigweba ukusebenza kwe-ceramicizinto zokuncamathelisa iithayile, ngaphezu kokunikela ingqalelo ekusebenzeni kwayo kokusebenza, amandla okuchasa ukutyibilika, kodwa kwakhona ingqalelo kumandla ayo omatshini kunye nexesha lokuvula. Iselulosi ether kwiceramicizinto zokuncamathelisa iithayileUkongeza kokuchaphazela iipropathi zerheological zeglue yeporcelain, efana nokusebenza okugudileyo, imeko yemela encamathelayo, kodwa nakwizixhobo zomatshini zeceramic.izinto zokuncamathelisa iithayileunempembelelo enamandla.

I-2, impembelelo yexesha lokuvula i-ceramicizinto zokuncamathelisa iithayile

Xa umgubo werabha kunye neselulosi ether zikho kudaka olumanzi, ezinye iimodeli zedatha zibonisa ukuba umgubo werabha unamandla e-kinetic anamandla okubambelela kwiimveliso zesamente, kunye ne-cellulose ether ikhona ngakumbi kwi-gap fluid, echaphazela i-viscosity kunye nokubeka ixesha lodaka. Kaninzi. Uxinzelelo lomphezulu we-cellulose ether mkhulu kunomgubo werabha, kwaye ukutyetyiswa kwe-ether ye-cellulose engaphezulu kwi-interface yodaka kunenzuzo ekwenziweni kweebhondi ze-hydrogen phakathi kwesiseko sendiza kunye ne-cellulose ether.

Umphunga wobumanzi obusuka kudaka olumanzi, udaka, i-cellulose ether kwindawo yokutyebisa umphezulu, imizuzu emi-5 inokwenza inwebu kumphezulu wodaka, iya kunciphisa izinga lokunyuka komphunga lokulandela, ngamanzi amaninzi asuka kwindawo etyebileyo yodaka. ukufudukela umaleko lodaka lubhityile, iingongoma ezivulekileyo ngokuyinxenye zinyibilike xa ukwakheka kokuqala inwebu, ukufuduka kwamanzi kunokuzisa ukutyeba ngakumbi cellulose etere eludaka phezu komhlaba.

Ngaloo ndlela, ukubunjwa kwefilimu ye-cellulose ether ebusweni bodaka kunempembelelo enkulu ekusebenzeni kodaka, 1) ifilimu eyenziwe incinci kakhulu, iya kuchithwa kabini, ayikwazi ukukhawulela ukuphuphuma kwamanzi, ukunciphisa amandla. 2) ifilimu eyenziwe inzima kakhulu, i-concentration ye-cellulose ether kwi-slurry clearance liquid iphezulu, kwaye i-viscosity inkulu. Xa i-tile ye-ceramic ifakwe, akulula ukuphula ifilimu phezu komhlaba. Ingabonwa ukuba ifilimu eyenza ukusebenza kwe-cellulose ether inempembelelo enkulu kwixesha lokuvula. Uhlobo lwe-cellulose ether (i-HPMC, i-HEMC, i-MC, njl.) kunye ne-degree of etherification (i-degree of substitution) ichaphazela ngokuthe ngqo ifilimu eyenza ukusebenza kwe-cellulose ether, kubunzima kunye nokuqina kwefilimu.

I-3, impembelelo yamandla okuzoba

I-Cellulose ether ayigcini nje ukubonelela ngodaka kunye nazo zonke iimpawu ezincedo ezingentla, kodwa iphinda ilibazise i-hydration kinetics yesamente. Esi siphumo sibambezelekile sibangelwa ikakhulu kukufakwa kweemolekyuli ze-cellulose ether kwizigaba ezahlukeneyo zeminerali kwinkqubo yesamente ukuba ifakwe amanzi, kodwa kuvunyelwene ngokubanzi ukuba iimolekyuli ze-cellulose ether zibhengezwa ikakhulu kwiimveliso ze-hydration ezifana ne-CSH kunye ne-calcium hydroxide, kwaye kunqabile ukuba zifakwe kwi-adsorbed. isigaba sokuqala seminerali se-clinker. Ukongeza, i-cellulose ether iyanciphisa i-ion (Ca2 +, SO42-, ...) ngenxa yokunyuka kwe-viscosity yesisombululo se-pore. Umsebenzi kwisisombululo sepore, esibuyisela umva inkqubo yokufakwa kwamanzi.

I-Viscosity yenye iparameter ebalulekileyo, emele iimpawu zeekhemikhali ze-cellulose ether. Njengoko kukhankanyiwe ngasentla, i-viscosity ichaphazela ubukhulu becala umthamo wokugcinwa kwamanzi, kwaye inefuthe elibalulekileyo ekusebenzeni kodaka olutsha. Nangona kunjalo, uphononongo lovavanyo lwafumanisa ukuba i-viscosity ye-cellulose ether phantse ayinasiphumo kwi-hydration kinetics yesamente. Ubunzima bemolekyuli bunempembelelo encinci kwi-hydration, kwaye umahluko omkhulu phakathi kobunzima beemolekyuli ezahlukeneyo yi-10min kuphela. Ke ngoko, ubunzima bemolekyuli abuyiyo iparameter ephambili yokulawula i-cement hydration.

Ukubuyiswa kwe-cellulose ether kuxhomekeke kwisakhiwo sayo sekhemikhali. Umkhwa oqhelekileyo kukuba kwi-MHEC, iqondo eliphezulu le-methylation, i-ether encinci ye-retading effect ye-cellulose ether. Ukongezelela, ukutshintshwa kwe-hydrophilic (njengokutshintshwa kwe-HEC) kunempembelelo enamandla yokunciphisa i-hydrophobic substitution (efana nokutshintshwa kwe-MH, i-MHEC kunye ne-MHPC). Isiphumo sokunciphisa i-cellulose ether ichaphazeleka kakhulu kwiiparamitha ezimbini zohlobo kunye nenani lamaqela afakwe endaweni.

Uvavanyo lwethu olucwangcisiweyo luphinde lwafumanisa ukuba umxholo wabaxumi udlala indima ebalulekileyo kumandla omatshini we-adhesive tile ye-ceramic. Sivavanye ukusebenza kwe-HPMC kunye needigri ezahlukeneyo zokutshintshwa kwi-ceramic tile adhesive, kwaye sivavanye impembelelo ye-cellulose ether equkethe amaqela ahlukeneyo phantsi kweemeko ezahlukeneyo zokuphilisa kwiipropati ze-mechanical ze-ceramic tile adhesive.

Ukutshintsha kwamandla omatshini phantsi kwemeko yokuvula ixesha lihambelana nesimo esiqhelekileyo sokushisa, esibuye sihambelane nokuqina kwefilimu ye-cellulose ether esathetha ngayo kwicandelo 2. I-HPMC enomxholo ophezulu we-methoxy (DS) kunye ne-hydroxypropoxy ephantsi ( MS) umxholo unokuqina okulungileyo, kodwa uya kuchaphazela ukumanzi kodaka olumanzi kwizinto ezingaphezulu.

4, isishwankathelo

I-ether ye-cellulose, ngakumbi i-methyl cellulose ether efana ne-HEMC kunye ne-HPMC, iyongeza into ebalulekileyo ekusetyenzisweni kweemveliso ezininzi zodaka olomileyo. Ipropati ebaluleke kakhulu ye-cellulose ether kukugcinwa kwayo kwamanzi kwizinto zokwakha izimbiwa. Ukuba i-cellulose ether ayifakwanga, umgca omncinci womdaka omtsha uya kumisa ngokukhawuleza, ukwenzela ukuba i-samente ingabi namanzi ngendlela eqhelekileyo, okubangela ukuba udaka alukwazi ukuqina kwaye alukwazi ukufumana ukunamathela kakuhle kwisiseko. Kukho izinto ezininzi ezichaphazela ukugcinwa kwamanzi kwi-ether cellulose, ezifana nedosi kunye ne-viscosity, kunye nokwakheka kwayo okungokwemvelo: Idigri yokutshintshwa kwintsebenzo yokugqibela yodaka inempembelelo enkulu, ixesha elide siye saxoxa ukuba i-viscosity ye-cellulose ether izinto ezisisiseko sesamente zinempembelelo enkulu kwixesha coagulation njalo njalo, uphononongo lwakutsha nje lufumene ukuba utshintsho viscosity yesamente ukuseta isiphumo ixesha lincinci kakhulu, kodwa endaweni yeentlobo zeqela kunye nokusebenzisana yeyona nto ibalulekileyo ichaphazela umsebenzi we-cellulose ether.

Ngoku ngokulandelelanayo ukubona ukusebenza kunye nendima yokuncamathelisa iithayile eziphambili izinto ezikrwada:

1, isamente

Sonke siyazi ukuba i-samente ayinayo ityhefu ukhuseleko lokusingqongileyo, kwaye inokumelana nokuguga okuqinileyo.

2, ukuhlelwa kwesanti

Isanti yokulinganisa ngokwenene isanti yomlambo emva kokuhlamba emva kokumisa, kwaye emva koko ukuhluza ubungakanani obuziinkozo kubungakanani besanti, nto leyo engeyiyo netyhefu kunye nokhuseleko lokusingqongileyo, indima yayo ephambili kukugcwalisa, ukuze kuncitshiswe ukushwabana kwezincamathelisi zethayile eziqinileyo. .

Ngaphezulu ziindidi ezimbini zomntu wonke oqhelene nemathiriyeli, isongezelelo sepolymer esingaqhelananga noluntu ngokubanzi apha ngezantsi, yintoni eyona nto ekugqibeleni?

3, HPMC (hydroxypropyl methyl cellulose ether)

I-HPMC yongezwa kwi-adhesives kwithayile ye-ceramic ngaphakathi kwendima ephambili kukugcina amanzi, ukutyeba, injongo kukuphucula i-ceramic tile incamathiso zokuqina kokugqibela, ukwandisa ixesha lokuvula kunye nokuphucula ukwakhiwa, umthombo wayo ngumqhaphu emva kokuguqulwa, oko kukuthi. yithi, ivela kwindalo, akukho bungozi kumzimba womntu, iimveliso zokusingqongileyo ngokupheleleyo;

I-4, i-polymer powder RDP efumaneka kwakhona

Indima yayo ephambili kwii-adhesives zethayile ze-ceramic kukuphucula amandla okudibanisa, akuyi kuba nayiphi na impembelelo ekwakhiweni, oko kukuthi, iintlobo ezahlukeneyo ze-ceramic tile adhesives ngaphakathi kokongezwa kwe-Redispersible polymer powder RDP asikwazi ukugweba xa isicelo. , ekuphela kwento enokubonakaliswa ngamandla okudibanisa i-ceramic tile adhesives emva kokuqiniswa kwezitena, Lo msebenzi ngokuqhelekileyo usebenzisa isixhobo somzobo wethayile ye-ceramic ukujonga ukuba unokuhlangabezana nemigangatho yesizwe, ukuya kwi-Redispersible polymer powder RDP ayikho iglu akukho izithako zeglue, yi-emulsion emaphethelweni enqaba yokumisa ngokutshiza emva kokugqitywa komgubo, unokuchaza kwakhona njengomgubo we-emulsion, ululame xa udibana namanzi uya kuchithwa kwakhona kwi-emulsion, oko kukuthi, i-adhesive. yethu yokuncamathelisa ithayile ceramic ithathwe emulsion kunokuba iglu, kwaye ke Redispersible ipolymer powder RDP kwakhona lolwabo iimveliso zokhuselo lokusingqongileyo, ngoko ke akukho mfuneko yakuba nexhala malunga nokuncamathelisa ithayile ceramic equlathe iglu ezifana izinto eziyingozi;

5, umcu womthi

Umsebenzi oyintloko we-ceramic tile adhesives kukumelana nokuqhekeka kunye nokunciphisa isikhumba se-samente ye-ceramic tile. Ikwavela nakwindalo. Iqhekezwe kwi-flocc ngesenzo somatshini womthi, kwaye isiseko sayo singumthi, ngoko ke ihambelana nokusingqongileyo.

6, isitatshi se-ether

Indima yayo ephambili kwi-ceramic tile adhesives i-anti-flow, i-anti-slip kunye ne-synergistic HPMC yokuphucula ukwakhiwa, yimveliso yesitashi sesityalo sendalo esiguqulwe yi-etherification, kodwa kwakhona ukusuka kubume beemveliso zokusingqongileyo.

Uyakwazi ukubona ngasentla iintlobo ezi-6 zemathiriyeli ekrwada zonke azinabungozi, imathiriyeli yokhuseleko lokusingqongileyo, ngoko ke izinto zokuncamathelisa iithayile zeceramic asiyoglu. Kwaye icandelo elivela kwimveliso, kufuneka lisebenzise indlela yentonga ebhityileyo, yonge ixesha lokugcina indawo esele injalo. Emva kophando lwezenzululwazi lweengcali, kunye nobungqina bexesha, kuyafaneleka ukuba kukhuthazwe.