HPMC mu Tile Adhesives

Tilezomatiraanthu ambiri amatchedwanso ceramiczomatira matailosi, omwe adalumikizana ndi kugwiritsa ntchito matailosi a ceramiczomatiraku ng'oma yake yopanda kanthu, yomata, yomanga, kukana kukalamba ndi zabwino zina zimazindikirika.

Cellulose etherMtengo wa HPMCmonga chowonjezera chofunikira kwambiri muzomatira matailosi, zomatira matailosikukoka mphamvu ndi nthawi yotsegula zimakhala ndi zotsatira zamphamvu, ndipo zinthu ziwirizi ndi zizindikiro zofunika kwambiri za ntchito yapamwambazomatira matailosi, kupyolera mu kuyesa kwa cellulose ether effect pazomatira matailosikatundu adawongoleredwa ndikuwunikiridwa.

1, mawu oyamba

Cement yopangidwa ndi ceramiczomatira matailosipakali pano ndi ntchito yaikulu ya wapadera youma kusanganikirana matope, amene ndi mtundu wa simenti monga chuma chachikulu cementing ndi kuwonjezeredwa ndi gradation wa akaphatikiza, wothandizila madzi posungira, wothandizila oyambirira mphamvu, lalabala ufa ndi zina organic kapena zosakhala admixtures. Nthawi zambiri amagwiritsidwa ntchito ndi kusanganikirana kwamadzi, poyerekeza ndi matope wamba simenti, amatha kusintha kwambiri mphamvu yolumikizirana pakati pa zinthu zomaliza ndi zinthu zapansi, ali ndi anti-slip yabwino ndipo ali ndi kukana kwambiri kwamadzi, kukana kutentha ndi ubwino wozizira wachisanu, womwe umagwiritsidwa ntchito kwambiri. kwa kumata matailosi amkati ndi kunja kwa khoma, matailosi apansi ndi zinthu zina zokongoletsera, Amagwiritsidwa ntchito kwambiri pokongoletsa makoma, pansi, zimbudzi, makhitchini ndi nyumba zina. Ndizinthu zomwe zimagwiritsidwa ntchito kwambiri ndi matayala a ceramic.

Nthawi zambiri tikamaweruza magwiridwe antchito a ceramiczomatira matailosi, kuwonjezera pa kumvetsera ntchito yake yogwiritsira ntchito, mphamvu yotsutsa-kutsetsereka, komanso kumvetsera mphamvu zake zamakina ndi nthawi yotsegula. Cellulose ether mu ceramiczomatira matailosikuwonjezera kukhudza rheological katundu za porcelain guluu, monga ntchito yosalala ntchito, ndodo mpeni mkhalidwe, komanso pa makina zimatha ceramic.zomatira matailosiali ndi chikoka champhamvu.

2, chikoka cha nthawi yotsegulira ya ceramiczomatira matailosi

Pamene ufa mphira ndi mapadi etero kukhalapo mu chonyowa matope, zitsanzo zina deta zikusonyeza kuti mphira ufa ali wamphamvu kinetic mphamvu kutsatira simenti mankhwala hydration, ndi mapadi efa alipo kwambiri mu kusiyana madzimadzi, zomwe zimakhudza mamasukidwe akayendedwe ndi kuika nthawi ya matope. Zambiri. Kuchulukana kwapang'onopang'ono kwa cellulose ether ndikokulirapo kuposa ufa wa mphira, ndipo kukhathamiritsa kwa cellulose ether kwambiri pamawonekedwe amatope kumapindulitsa kupanga zomangira za haidrojeni pakati pa ndege yoyambira ndi cellulose ether.

Kuchuluka kwa chinyezi kuchokera mumatope onyowa, matope, cellulose ether pamtunda wolemerera, mphindi 5 zimatha kupanga nembanemba pamwamba pa matope, kuchepetsa kuchuluka kwa evaporation yotsatila, ndi madzi ambiri kuchokera ku slurry wandiweyani. kusamukira ku matope wosanjikiza ndi woonda, mfundo lotseguka mbali kusungunuka pamene mapangidwe nembanemba koyamba, kusamuka kwa madzi kungabweretse kulemeretsa kwa mapadi efa mu matope pamtunda.

Choncho, mapangidwe a filimu ya cellulose etere pamwamba pa matope amakhudza kwambiri ntchito ya matope, 1) filimuyo imapangidwa ndi yopyapyala kwambiri, idzasungunuka kawiri, osakhoza kuchepetsa kutuluka kwa madzi, kuchepetsa mphamvu. 2) filimu yopangidwa ndi yokhuthala kwambiri, kuchuluka kwa cellulose ether mumadzi otsekemera otsekemera kumakhala kwakukulu, komanso kukhuthala kwake ndi kwakukulu. Pamene matailosi a ceramic ayikidwa, sikophweka kuswa filimuyo pamtunda. Zitha kuwoneka kuti filimu yomwe imapanga ntchito ya cellulose ether imakhudza kwambiri nthawi yotsegulira. Mtundu wa cellulose ether (HPMC, HEMC, MC, etc.) ndi digiri ya etherification (degree of substitution) zimakhudza mwachindunji filimu yomwe imapanga ntchito ya cellulose ether, kuuma ndi kulimba kwa filimuyo.

3, mphamvu yokoka

Ma cellulose ether sikuti amangopatsa matope ndi zinthu zonse zomwe zili pamwambazi, komanso amachedwetsa ma hydration kinetics a simenti. Izi mochedwa zotsatira makamaka chifukwa adsorption wa cellulose ether mamolekyu pa magawo osiyanasiyana mchere mu dongosolo simenti kukhala hydrated, koma ambiri amavomereza kuti mapadi etha mamolekyu makamaka adsorbed pa mankhwala hydration monga CSH ndi calcium hydroxide, ndipo kawirikawiri adsorbed pa. gawo loyamba la mineral la clinker. Kuphatikiza apo, ether ya cellulose imachepetsa ayoni (Ca2+, SO42-, ...) chifukwa chakuchulukira kwamphamvu kwa pore solution. Zochita mu pore solution, zomwe zimalepheretsanso hydration.

Viscosity ndi gawo lina lofunikira, lomwe limayimira mankhwala a cellulose ether. Monga tafotokozera pamwambapa, kukhuthala kumakhudza makamaka mphamvu yosungira madzi, komanso kumakhudza kwambiri kugwira ntchito kwa matope atsopano. Komabe, kafukufuku experimental anapeza kuti mamasukidwe akayendedwe a mapadi ether anali pafupifupi alibe mphamvu pa hydration kinetics wa simenti. Kulemera kwa mamolekyu kulibe mphamvu pang'ono pa hydration, ndipo kusiyana kwakukulu pakati pa zolemera zosiyana za maselo ndi 10min yokha. Chifukwa chake, kulemera kwa mamolekyu siwofunikira kwambiri pakuwongolera simenti ya hydration.

Kuchedwa kwa cellulose ether kumadalira kapangidwe kake ka mankhwala. Zomwe zimachitika ndizoti kwa MHEC, kuchuluka kwa methylation kumakhala kocheperako, kumachepetsa kuchepa kwa cellulose ether. Kuonjezera apo, hydrophilic substitution (monga m'malo mwa HEC) imakhala ndi mphamvu yowonongeka kuposa hydrophobic substitution (monga m'malo mwa MH, MHEC ndi MHPC). Kuchepetsa mphamvu ya cellulose ether kumakhudzidwa makamaka ndi magawo awiri amtundu ndi kuchuluka kwa magulu olowetsedwa.

Kuyesera kwathu mwadongosolo kudapezanso kuti zomwe zili m'malo mwake zimagwira ntchito yofunika kwambiri pakulimba kwamakina a zomatira za matailosi a ceramic. Tidawunika momwe HPMC imagwirira ntchito m'malo osiyanasiyana pazomatira matailosi a ceramic, ndikuyesa mphamvu ya cellulose ether yomwe ili ndi magulu osiyanasiyana pamikhalidwe yosiyanasiyana yochiritsa pamakina omatira matailosi a ceramic.

Kusintha kwa mphamvu zamakina pansi pa nthawi yotsegulira kumagwirizana ndi kutentha kwabwino, komwe kumagwirizananso ndi kulimba kwa filimu ya cellulose ether yomwe takambirana mu gawo 2. HPMC yokhala ndi methoxy (DS) yapamwamba komanso yochepa hydroxypropoxy ( MS) zili ndi kulimba kwabwino, koma zimakhudza kunyowa kwa dothi lonyowa pazinthu zapamtunda.

4, chidule

Cellulose ether, makamaka methyl cellulose ether monga HEMC ndi HPMC, ndizowonjezera zofunikira pakugwiritsa ntchito zinthu zambiri zamatope owuma. Chinthu chofunika kwambiri cha cellulose ether ndikusungirako madzi muzomangamanga zamchere. Ngati cellulose ether sichiwonjezedwa, matope opyapyala amatope amatha kuuma mwamsanga, kotero kuti simentiyo sichitha kukhala hydrated mwa njira yachibadwa, zomwe zimapangitsa kuti matopewo asawume ndipo sangathe kupeza bwino kumamatira kumunsi. Pali zinthu zambiri zomwe zimakhudza kasungidwe ka madzi a cellulose ether, monga mlingo ndi mamasukidwe akayendedwe, komanso kapangidwe kake kachilengedwe: M'malo mwa digiri yomaliza ya matope imakhala ndi zotsatira zambiri, kwa nthawi yayitali takhala tikunena kuti kukhuthala kwa cellulose ether zinthu zoyambira za simenti zimakhudza kwambiri nthawi ya coagulation ndi zina zotero, kafukufuku waposachedwa wapeza kuti kusintha kwa kukhuthala kwa nthawi ya simenti kumakhala kovuta kwambiri. yaing'ono, koma m'malo mwa mitundu ya gulu ndi kugwirizana ndi chinthu chofunika kwambiri zimakhudza ntchito ya mapadi ether.

Tsopano motsatana kuti muwone magwiridwe antchito ndi ntchito ya zomatira matailosi zida zazikulu zopangira:

1, simenti

Tonse tikudziwa kuti simenti ndiyoteteza zachilengedwe, ndipo imakhala yolimba kukalamba.

2, kuyika mchenga

Grading mchenga kwenikweni mtsinje mchenga pambuyo kutsuka pambuyo kuyanika, ndiyeno sieving kukula kwa mbewu kukula kwa mchenga, amenenso sanali poizoni ndi kuteteza chilengedwe, ntchito yake yaikulu ndi kudzaza, pofuna kuchepetsa shrinkage wa matailosi zomatira solidification. .

Pamwambapa pali mitundu iwiri ya aliyense wodziwa zakuthupi, chowonjezera cha polima chomwe anthu sachidziwa mwatsatanetsatane pansipa, ndi chiyani pamapeto pake?

3, HPMC (hydroxypropyl methyl cellulose ether)

HPMC yowonjezeredwa ku zomatira za matailosi a ceramic mkati mwa gawo lalikulu ndikusunga madzi, kukhuthala, cholinga chake ndi kukonza zomatira za ceramic matailosi omaliza kulimbitsa mphamvu, kutalikitsa nthawi yotsegulira ndikuwongolera zomanga, gwero lake ndi thonje pambuyo pa kusinthidwa, ndiko kuti kunena, zimachokera ku chilengedwe, palibe vuto kwa thupi la munthu, mtheradi chilengedwe chitetezo mankhwala;

4, Redispersible polima ufa RDP

Udindo wake waukulu mu zomatira za matailosi a ceramic ndikuwongolera mphamvu zomangirira, sizikhala ndi zotsatirapo zilizonse pakumanga, kutanthauza kuti, mitundu yosiyanasiyana ya zomatira za ceramic matailosi mkati mwa kuwonjezera kwa Redispersible polima ufa RDP sitingathe kuweruza pamene ntchito , chinthu chokhacho chomwe chingawonetsere ndi mphamvu yomangirira ya zomatira za matailosi a ceramic pambuyo pa kulimba kwa njerwa, Kuchita uku kumachitika kudzera mu chida chojambulira matayala a ceramic kuti muwone ngati angakwaniritse miyezo ya dziko, ku Redispersible. ufa wa polima RDP si guluu palibe zosakaniza zomatira, ndi emulsion m'mphepete mwa nsanja yowumitsa pogwiritsa ntchito kuyanika kutsitsi pambuyo pomaliza ufa, amathanso kufotokoza ngati ufa wa emulsion, kuchira akakumana ndi madzi adzasungunukanso. emulsion, ndiko kuti, zomatira za zomatira zathu za ceramic matailosi zimachokera ku emulsion osati guluu, ndiyeno Redispersible polima ufa RDP nawonso ku zinthu zoteteza chilengedwe, kotero palibe chifukwa chodera nkhawa zomatira za matailosi a ceramic okhala ndi zomatira zovulaza zotere;

5, ulusi wamatabwa

Ntchito yayikulu ya zomatira za matailosi a ceramic ndikukana kusweka ndi kuchepetsa khungu la simenti la matailosi a ceramic. Zimachokeranso ku chilengedwe. Imathyoledwa ku flocc ndi mawotchi amachitidwe amatabwa, ndipo thunthu lake ndi matabwa, kotero ndi logwirizana ndi chilengedwe.

6, wowuma ether

Udindo wake waukulu mu zomatira matailosi a ceramic ndi anti-flow, anti-slip and synergistic HPMC kuti apititse patsogolo zomangamanga, ndizomwe zimapangidwa ndi wowuma wachilengedwe wosinthidwa ndi etherification, komanso kuchokera kuzinthu zoteteza chilengedwe.

Mutha kuwona pamwamba pa mitundu 6 ya zida zonse zilibe vuto, zoteteza chilengedwe, kotero zomatira matailosi a ceramic si zomatira. Ndipo chigawo chomwe chimachokera ku mankhwala, chiyenera kugwiritsa ntchito njira yopyapyala ya ndodo, kupulumutsa nthawi kuti ipulumutse malo kale. Pambuyo pa kafukufuku wa sayansi wa akatswiri, komanso umboni wa nthawi, ndi bwino kukwezedwa.