Sunan Sinanci na HPMC shine hydroxypropyl methylcellulose.Ba shi da ionic kuma ana amfani dashi sau da yawa azaman wakili mai riƙe da ruwa a cikin busassun busassun turmi.Shi ne abin da aka fi amfani da shi a cikin turmi.
Tsarin samarwa na HPMC galibi samfurin ether ne na tushen polysaccharide wanda aka samar ta alkalization da etherification na fiber auduga (na gida).Ba shi da caji da kansa, baya amsa tare da caje ions a cikin kayan gelling, kuma yana da ingantaccen aiki.Hakanan farashin yana ƙasa da sauran nau'ikan ethers cellulose, don haka ana amfani dashi sosai a cikin busassun turmi mai gauraya.
Ayyukan hydroxypropyl methylcellulose: Yana iya kauri sabon gauraye turmi don samun ɗan ɗankowar jika kuma ya hana rarrabuwa.(Kauri) Riƙewar ruwa kuma shine mafi mahimmancin halayen, wanda ke taimakawa wajen kiyaye adadin ruwan kyauta a cikin turmi, ta yadda bayan an gina turmi, siminti ya sami ƙarin lokaci don yin ruwa.(Tsarin ruwa) Yana da kaddarorin haɓaka iska, wanda zai iya gabatar da kumfa iri ɗaya da kyawawan kumfa don inganta ginin turmi.
Mafi girman danko na hydroxypropyl methylcellulose ether, mafi kyawun aikin riƙe ruwa.Danko shine muhimmin siga na aikin HPMC.A halin yanzu, masana'antun HPMC daban-daban suna amfani da hanyoyi da kayan aiki daban-daban don auna danko na HPMC.Babban hanyoyin sune HaakeRotovisko, Hoppler, Ubbelohde da Brookfield.
Don samfurin iri ɗaya, sakamakon danko da aka auna ta hanyoyi daban-daban sun bambanta sosai, wasu ma sun ninka bambance-bambance.Sabili da haka, lokacin kwatanta danko, dole ne a gudanar da shi tsakanin hanyoyin gwaji iri ɗaya, gami da zafin jiki, na'ura mai juyi, da sauransu. Game da girman ƙwayar cuta, mafi ƙarancin ƙwayar, mafi kyawun riƙewar ruwa.Bayan manyan barbashi na cellulose ether sun hadu da ruwa, nan da nan saman ya narke kuma ya samar da gel don kunsa kayan don hana kwayoyin ruwa daga ci gaba da shiga.Wani lokaci ba za a iya tarwatsewa da narkar da shi daidai ba ko da bayan dogon lokaci yana motsawa, yana samar da maganin flocculent mai hazo ko agglomeration.Yana tasiri sosai akan riƙe ruwa na ether cellulose, kuma solubility yana ɗaya daga cikin abubuwan da za a zabi ether cellulose.
Fineness kuma muhimmin ma'aunin aiki ne na methyl cellulose ether.Ana buƙatar MC da aka yi amfani da shi don busassun busassun turmi don zama foda, tare da ƙananan abun ciki na ruwa, kuma fineness kuma yana buƙatar 20% ~ 60% na girman barbashi ya zama ƙasa da 63um.Lalacewar yana rinjayar solubility na hydroxypropyl methylcellulose ether.Mc mai laushi yawanci granular ne, kuma yana da sauƙi a narke cikin ruwa ba tare da haɓaka ba, amma yawan narkewa yana da jinkirin gaske, don haka bai dace da amfani da busassun busassun turmi ba.
A cikin busassun busassun turmi, MC yana tarwatse a tsakanin kayan siminti kamar tara, filler mai kyau da siminti, kuma isasshen foda kawai zai iya guje wa methyl cellulose ether agglomeration lokacin haɗuwa da ruwa.Lokacin da aka ƙara MC da ruwa don narkar da agglomerates, yana da wuyar tarwatsawa da narkewa.M fineness na MC ba kawai ɓatacce ba ne, amma kuma yana rage ƙarfin gida na turmi.Lokacin da aka shafa irin wannan busasshen turmi a wani yanki mai girma, saurin warkar da busassun busassun turmi na gida zai ragu sosai, kuma za a sami tsagewa saboda lokutan warkewa daban-daban.Don turmi da aka fesa tare da ginin injiniya, abin da ake buƙata don fineness ya fi girma saboda ɗan gajeren lokacin haɗuwa.Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙewar ruwa.Duk da haka, mafi girman danko kuma mafi girman nauyin kwayoyin halitta na MC, raguwa mai dacewa a cikin solubility zai yi mummunan tasiri akan ƙarfin da aikin ginin turmi.
Mafi girma da danko, mafi bayyananne tasirin thickening akan turmi, amma ba daidai ba ne kai tsaye.Mafi girma da danko, da karin danko da rigar turmi zai zama, wato, a lokacin ginawa, an bayyana shi a matsayin mai mannewa ga scraper da babban mannewa ga substrate.Amma ba taimako ba ne don ƙara ƙarfin tsarin jika da kanta.Wato, yayin gini, aikin anti-sag ba a bayyane yake ba.Akasin haka, wasu matsakaici da ƙananan danko amma gyare-gyaren ethers na methyl cellulose suna da kyakkyawan aiki wajen inganta ƙarfin tsarin jika.
Riƙewar ruwa na HPMC kuma yana da alaƙa da yanayin zafin da ake amfani da shi, kuma riƙewar ruwa na methyl cellulose ether yana raguwa tare da haɓakar zafin jiki.Koyaya, a cikin aikace-aikacen zahiri na zahiri, turmi foda busassun ana amfani da su sau da yawa zuwa abubuwan zafi a yanayin zafi mai yawa (mafi girma fiye da digiri 40) a cikin mahalli da yawa, kamar bangon bangon bangon bangon waje a ƙarƙashin rana a lokacin rani, wanda galibi yana haɓaka Curing na siminti da taurin busassun turmi foda.Rashin raguwar adadin ruwa yana haifar da jin dadi mai mahimmanci cewa duka aikin aiki da tsattsauran ra'ayi sun shafi, kuma yana da mahimmanci musamman don rage tasirin yanayin zafi a ƙarƙashin wannan yanayin.
Dangane da haka, a halin yanzu ana la'akari da ƙari na methyl hydroxyethyl cellulose ether a matsayin sahun gaba na ci gaban fasaha.Ko da yake adadin methyl hydroxyethyl cellulose yana ƙaruwa (maganin lokacin rani), ƙarfin aiki da juriya har yanzu ba zai iya biyan bukatun amfani ba.Ta hanyar wasu jiyya na musamman akan MC, irin su ƙara yawan digiri na etherification, da dai sauransu, ana iya kiyaye tasirin ruwa a cikin zafin jiki mafi girma, don haka zai iya samar da mafi kyawun aiki a ƙarƙashin yanayi mai tsanani.
Matsakaicin adadin HPMC bai kamata ya yi yawa ba, in ba haka ba zai ƙara yawan buƙatar ruwa na turmi, zai manne da trowel, kuma lokacin saitawa zai yi tsayi da yawa, wanda zai shafi haɓakar ginin.Samfuran turmi daban-daban suna amfani da HPMC tare da danko daban-daban, kuma ba sa amfani da HPMC mai tsananin danko a hankali.Saboda haka, kodayake samfuran hydroxypropyl methylcellulose suna da kyau, ana yaba su idan aka yi amfani da su da kyau.Zaɓin HPMC daidai shine babban alhakin ma'aikatan dakin gwaje-gwaje na kamfani.A halin yanzu, yawancin dillalai marasa gaskiya suna haɓaka HPMC, kuma ingancin ba shi da kyau.Lokacin zabar wani cellulose, dakin gwaje-gwaje ya kamata ya yi aiki mai kyau a cikin gwaji don tabbatar da kwanciyar hankali na samfurin turmi, kuma kada ku kasance masu hadama don arha kuma haifar da asarar da ba dole ba.
Lokacin aikawa: Mayu-04-2023