HPMC a cikin Tile Adhesives

Tileadhesivesmutane da yawa kuma aka sani da yumbutile adhesives, waɗanda suka tuntuɓi yin amfani da yumbu tileadhesiveszuwa ga ganga maras amfani, m, gini, juriyar tsufa da sauran fa'idodin an san su sosai.

Cellulose etherHPMCa matsayin mafi mahimmancin ƙari a cikintile adhesives, tile adhesivesja ƙarfi da lokacin buɗewa yana da tasiri mai ƙarfi, kuma waɗannan abubuwa biyu ma mahimman alamomi ne na babban aikitile adhesives, ta hanyar gwajin tasirin ether cellulose akantile adhesivesAn taƙaita kaddarorin kuma an sake duba su.

1, Gabatarwa

yumbu na tushen simintitile adhesivesa halin yanzu shine mafi girma aikace-aikace na musamman busassun hadawa turmi, wanda shi ne wani nau'i na siminti a matsayin babban siminti abu da kuma supplementation da gradation na aggregate, ruwa reservation wakili, farkon ƙarfi wakili, latex foda da sauran Organic ko inorganic admixtures. Yawancin lokaci ana amfani da shi kawai tare da haɗuwa da ruwa, idan aka kwatanta da turmi na ciminti na yau da kullum, zai iya inganta ƙarfin haɗin gwiwa tsakanin kayan karewa da kayan tushe, yana da kyau anti-zamewa kuma yana da kyakkyawan juriya na ruwa, juriya mai zafi da daskarewa-thawing sake zagayowar, yafi amfani da shi. don liƙa fale-falen bango na ciki da na waje, fale-falen fale-falen buraka da sauran kayan ado, Ana amfani da shi sosai a cikin kayan ado na bango, benaye, dakunan wanka, kicin da sauran gine-gine. Shi ne abin da aka fi amfani da shi na yumbu mai ɗamara.

Yawancin lokaci idan muka yi hukunci game da aikin yumburatile adhesives, ban da kula da aikinta na aiki, ikon hana zamiya, amma kuma kula da ƙarfin injinsa da lokacin buɗewa. Cellulose ether a cikin yumbutile adhesivesban da shafi rheological Properties na ain manne, kamar m aiki yi, sanda wuka halin da ake ciki, amma kuma a kan inji Properties na yumbu.tile adhesivesyana da tasiri mai karfi.

2, tasirin lokacin buɗewar yumburatile adhesives

Lokacin da roba foda da cellulose ether sun kasance a cikin rigar turmi, wasu samfurori sun nuna cewa roba foda yana da makamashi mai karfi don manne wa samfuran hydration na siminti, kuma ether cellulose ya kasance mafi a cikin ruwan rata, wanda ke rinjayar danko da saita lokacin turmi. Kara. Tashin hankali na ether na cellulose ya fi girma fiye da foda na roba, kuma wadatar da ƙarin ether cellulose a turmi yana da amfani ga samuwar haɗin hydrogen tsakanin jirgin sama da cellulose ether.

Danshi evaporation daga cikin rigar turmi, turmi, cellulose ether a cikin surface wadata, 5 minutes iya samar da wani membrane a kan surface na turmi, zai rage evaporation kudi na bi-up, tare da ƙarin ruwa daga slurry lokacin farin ciki part. matsawa zuwa turmi Layer ya fi sirara, buɗaɗɗen wuraren da aka narkar da su lokacin da farkon samuwar membrane, ƙaura na ruwa na iya kawo ƙarin wadatar cellulose ether a ciki. turmi a saman.

Don haka, samuwar fim ɗin ether na cellulose a kan turmi yana da tasiri mai girma akan aikin turmi, 1) fim ɗin da aka kafa yana da bakin ciki sosai, za a narkar da shi sau biyu, ba zai iya iyakance fitar da ruwa ba, rage ƙarfin. 2) Fim ɗin da aka kafa yana da kauri sosai, ƙaddamar da ether cellulose a cikin ruwa mai slurry yana da girma, kuma danko yana da girma. Lokacin da aka liƙa tayal yumbura, ba shi da sauƙi don karya fim ɗin a saman. Ana iya ganin cewa fim din da ke samar da aikin cellulose ether yana da tasiri mai girma akan lokacin budewa. Nau'in ether cellulose (HPMC, HEMC, MC, da dai sauransu) da digiri na etherification (digiri na maye gurbin) kai tsaye yana shafar aikin fim na ether na cellulose, zuwa ga tauri da taurin fim ɗin.

3, tasirin zana ƙarfi

Cellulose ether ba kawai yana ba da turmi tare da duk abubuwan da ke sama masu fa'ida ba, har ma yana jinkirta haɓakar hydration na siminti. Wannan retarded sakamako ne yafi saboda adsorption na cellulose ether kwayoyin a kan daban-daban ma'adinai matakai a cikin siminti tsarin da ake hydrated, amma an yarda da cewa cellulose ether kwayoyin suna yafi adsorbed a hydration kayayyakin kamar CSH da calcium hydroxide, kuma da wuya adsorbed a kan. ainihin ma'adinai lokaci na clinker. Bugu da ƙari, ether cellulose yana rage ions (Ca2+, SO42-, ...) saboda ƙarar danko na maganin pore. Ayyuka a cikin maganin pore, wanda ya kara jinkirta tsarin hydration.

Danko wani muhimmin siga ne, wanda ke wakiltar sinadarai na ether cellulose. Kamar yadda aka ambata a sama, danko yafi rinjayar iyawar ruwa, kuma yana da tasiri mai mahimmanci akan aikin sabon turmi. Duk da haka, binciken gwajin ya gano cewa danko na ether cellulose ba shi da wani tasiri a kan hydration kinetics na siminti. Nauyin kwayoyin halitta yana da ɗan tasiri akan hydration, kuma babban bambanci tsakanin nau'ikan nau'ikan kwayoyin halitta shine kawai 10min. Saboda haka, nauyin kwayoyin ba shine maɓalli na maɓalli don sarrafa ruwan siminti ba.

Ragewar ether cellulose ya dogara da tsarin sinadarai. Tsarin gabaɗaya shine don MHEC, mafi girman matakin methylation, ƙaramar tasirin retarding na ether cellulose. Bugu da ƙari, maye gurbin hydrophilic (kamar maye gurbin HEC) yana da tasiri mai karfi na jinkiri fiye da maye gurbin hydrophobic (kamar maye gurbin MH, MHEC da MHPC). Sakamakon retarding na ether cellulose ya fi shafar sigogi biyu na nau'i da adadin ƙungiyoyin da aka maye gurbinsu.

Gwajin mu na yau da kullun kuma ya gano cewa abubuwan da ke maye gurbin suna taka muhimmiyar rawa a cikin ƙarfin injin yumbura m. Mun kimanta aikin HPMC tare da digiri daban-daban na maye gurbin a cikin mannen tayal yumbu, kuma mun gwada tasirin ether cellulose mai ɗauke da ƙungiyoyi daban-daban a ƙarƙashin yanayi daban-daban na warkarwa akan kaddarorin injin yumbura m.

Canje-canje na ƙarfin injiniya a ƙarƙashin yanayin lokacin buɗewa ya dace da yanayin yanayin zafi na al'ada, wanda kuma ya dace da taurin fim ɗin ether cellulose da muka yi magana game da shi a cikin sashe na 2. HPMC tare da babban methoxy (DS) abun ciki da ƙananan hydroxypropoxy ( MS) abun ciki yana da tauri mai kyau, amma zai yi tasiri a jika na turmi don kayan saman.

4, takaitawa

Cellulose ether, musamman methyl cellulose ether irin su HEMC da HPMC, wani abu ne mai mahimmanci a cikin aikace-aikace na yawancin busassun kayan turmi. Mafi mahimmancin dukiya na ether cellulose shine riƙewar ruwa a cikin kayan gini na ma'adinai. Idan ba a ƙara ether cellulose ba, ƙananan ƙananan turmi na sabon turmi zai bushe da sauri, don haka ciminti ba za a iya shayar da shi a cikin hanyar al'ada ba, wanda ya haifar da turmi ba zai iya taurare ba kuma ba zai iya samun kyakkyawar mannewa ga tushe ba. Akwai abubuwa da yawa da suka shafi riƙewar ruwa na cellulose ether, irin su sashi da danko, da kuma abubuwan da ke tattare da su: Matsayin maye gurbin don aikin ƙarshe na turmi yana da tasiri mafi girma, na dogon lokaci mun yi jayayya cewa danko na cellulose ether ga Siminti tushe kayan yana da babban tasiri a kan lokacin coagulation da sauransu, wani bincike na baya-bayan nan ya gano cewa canjin danko na simintin saitin lokacin sakamako kadan ne, amma a maimakon haka. nau'ikan rukuni da haɗin kai tare da shi shine mafi mahimmancin abin da zai shafi aikin ether cellulose.

Yanzu bi da bi don ganin aiki da rawar tile adhesives main raw kayan:

1, siminti

Dukanmu mun san cewa siminti tabbas ba kare muhalli ba ne mai guba, kuma yana da ƙarfin juriya na tsufa.

2, yashi grading

Yashi Grading a haƙiƙa yashin kogi ne bayan an wanke shi, sannan kuma kirɓare wani girman girman yashi, wanda kuma ba shi da guba da kuma kare muhalli, babban aikinsa shi ne cikowa, don rage ƙanƙantar daskararrun tile. .

A sama akwai nau'i biyu na kowa da kowa ya san abu, ƙari na polymer wanda jama'a ba su saba da su dalla-dalla a ƙasa ba, menene a ƙarshe?

3, HPMC (hydroxypropyl methyl cellulose ether)

HPMC kara da yumbu tile adhesives a cikin babban rawa shi ne kiyaye ruwa, thickening, manufar shi ne don inganta yumbu tile adhesives karshe solidification ƙarfi, tsawanta lokacin budewa da inganta ginin, tushen sa shine auduga bayan gyarawa, wato ka ce, ya fito ne daga yanayi, ba cutarwa ga jikin mutum ba, cikakkun kayayyakin kare muhalli;

4, Redispersible polymer foda RDP

Babban aikinsa a cikin mannen tayal yumbu shine don haɓaka ƙarfin haɗin gwiwa, ba zai sami wani tasiri akan ginin ba, wato, nau'ikan nau'ikan yumbu na yumbu a cikin ƙari na Redispersible polymer foda RDP ba za mu iya yin hukunci ba lokacin aikace-aikacen. , Abinda kawai zai iya nunawa shine ƙarfin haɗin gwiwa na yumbu tayal adhesives bayan tubalin ƙarfafawa, Wannan aikin shine gaba ɗaya ta hanyar kayan zane na yumbu don duba ko zai iya saduwa da ƙasa. Standards, to Redispersible polymer foda RDP ba manne babu manne sinadaran, shi ne emulsion a gefen bushewa hasumiya ta wajen fesa bushewa bayan kammala foda, kuma iya bayyana shi a matsayin emulsion foda, murmurewa lokacin da ta ci karo da ruwa. zai sake narke cikin emulsion, Wato, manne na yumbu tile adhesives an samo shi daga emulsion maimakon manne, sa'an nan kuma Redispersible polymer foda. Hakanan RDP na cikin samfuran kare muhalli ne, don haka babu buƙatar damuwa game da mannen tayal yumbura mai ɗauke da manne irin waɗannan abubuwa masu cutarwa;

5, zaren itace

Babban aikin mannen tayal yumbu shine don tsayayya da fatattaka da rage fatar siminti na tayal yumbura. Hakanan ya zo daga yanayi. An karye shi zuwa flocc ta aikin injina na itace, kuma ainihinsa itace, don haka yana da alaƙa da muhalli.

6, sitaci

Babban aikinsa a cikin mannen tayal yumbu shine anti-flow, anti-slip and synergistic HPMC don inganta gine-gine, shine samfurin sitaci na halitta wanda aka gyara ta hanyar etherification, amma kuma daga yanayin kare muhalli.

Ana iya gani sama da nau'ikan albarkatun ƙasa guda 6 duk ba su da lahani, kayan kare muhalli, don haka adhesives na yumbu ba manne ba ne. Kuma bangaren da ya fito daga samfurin, dole ne ya yi amfani da hanyar sandar bakin ciki, yana adana lokaci don adana sarari da yawa. Bayan binciken kimiyya na masana, da kuma tabbacin lokaci, yana da daraja a inganta.