Mafi girman danko na hydroxypropyl methylcellulose, 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 ɗanko 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 aiwatar da shi tsakanin hanyoyin gwaji iri ɗaya, gami da zazzabi, rotor, da sauransu.
Game da girman barbashi, mafi kyawun barbashi, mafi kyawun riƙon 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 asara ba ne, amma kuma yana rage ƙarfin gida na turmi.Lokacin da aka shafa irin wannan busasshen turmi a cikin wani babban yanki, saurin warkar da busasshen busassun turmi na gida zai ragu sosai, kuma za a sami tsagewa saboda lokutan warkewa daban-daban.Don turmi da aka fesa tare da aikin 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.A lokacin 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.
Mafi girman adadin ether cellulose da aka ƙara zuwa turmi, mafi kyawun aikin riƙewar ruwa, kuma mafi girman danko, mafi kyawun aikin riƙewar ruwa.
Har ila yau, tarar HPMC tana da wani tasiri a kan riƙewar ruwa.Gabaɗaya magana, ga methyl cellulose ethers tare da danko iri ɗaya amma lafiya daban-daban, a ƙarƙashin adadin ƙari iri ɗaya, mafi kyawun mafi kyawun mafi kyawun tasirin riƙewar ruwa.
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.Ko da yake methyl hydroxyethyl cellulose ether additives a halin yanzu ana la'akari da su a kan gaba wajen ci gaban fasaha, dogaro da zafin jiki har yanzu zai haifar da raunana aikin busassun busassun turmi.
Ƙara yawan adadin methyl hydroxyethyl cellulose, iya 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.
Lokacin aikawa: Afrilu-10-2023