Mafi girma da danko naHPMChydroxypropyl methyl cellulose, 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 sanin ɗankowar HPMC. Babban hanyoyin sune Haake Rotovisko, Hoppler, Ubbelohde da Brookfield, da dai sauransu.
Don samfurin iri ɗaya, sakamakon danko da aka auna ta hanyoyi daban-daban sun bambanta sosai, wasu ma bambance-bambance ne. Sabili da haka, lokacin kwatanta danko, dole ne a aiwatar da shi tsakanin hanyar gwajin iri ɗaya, gami da zazzabi, rotor, da sauransu.
Don girman barbashi, mafi kyawun barbashi, mafi kyawun riƙewar ruwa. Manyan barbashi na cellulose ether lamba tare da ruwa, da surface nan da nan narke da kuma samar da wani gel to kunsa sama da abu don hana ruwa kwayoyin daga ci gaba da shiga, wani lokacin dogon lokaci stirring ba za a iya ko'ina tarwatsa narkar da, samuwar wani laka flocculent bayani ko agglomerate. Solubility na ether cellulose yana daya daga cikin abubuwan da za a zabi ether cellulose. Fineness kuma muhimmin ma'aunin aiki ne na methyl cellulose ether. MC don busassun turmi yana buƙatar foda, ƙananan abun ciki na ruwa, da fineness na 20% ~ 60% girman barbashi kasa da 63um. Fineness yana rinjayar solubility naHPMChydroxypropyl methyl cellulose ether. M ƙwaƙƙwal yawanci granular ne kuma ana iya narkar da shi cikin sauƙi cikin ruwa ba tare da haɓaka ba, amma saurin rushewar yana da jinkirin gaske, don haka bai dace da amfani da busasshiyar turmi ba. A cikin busasshiyar turmi, MC yana tarwatsewa tsakanin jimillar, filaye masu kyau da kayan siminti kamar siminti, kuma foda kawai wanda yake da kyau zai iya guje wa dunkulewar methyl cellulose ether lokacin haɗe da ruwa. Lokacin da MC ya ƙara ruwa don narkar da agglomerate, yana da wuya a tarwatsawa da narkar da shi. MC tare da m fineness ba kawai sharar gida, amma kuma rage gida ƙarfi na turmi. Lokacin da aka gina irin wannan busasshen turmi a wani babban wuri, saurin warkar da busasshen turmi na gida yana raguwa sosai, wanda ke haifar da tsagewar lokacin warkewa daban-daban. Don injin fesa turmi, saboda ɗan gajeren lokacin haɗawa, ƙarancin ya fi girma.
Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙewar ruwa. Duk da haka, mafi girman danko shine, mafi girman nauyin kwayoyin halitta na MC shine, kuma aikin rushewa zai ragu daidai, wanda yana da mummunan tasiri akan ƙarfin da aikin ginin turmi. Mafi girman danko, mafi bayyane tasirin tasirin turmi, amma bai dace da dangantakar ba. Mafi girma da danko, rigar turmi zai zama mafi m, duka gine-gine, aikin ƙwanƙwasa mai laushi da babban mannewa ga kayan tushe. Amma ba taimako ba ne don ƙara ƙarfin tsarin jika. A lokacin gini, aikin anti-sag ba a bayyane yake ba. Akasin haka, wasu ƙananan danko amma gyare-gyare na methyl cellulose ethers suna da kyakkyawan aiki wajen inganta ƙarfin tsarin jika.
Ƙara yawan ether cellulose zuwa turmi, mafi kyawun aikin riƙe ruwa, mafi girma da danko, mafi kyawun aikin riƙe ruwa.
Har ila yau, lafiyar HPMC yana da wani tasiri a kan riƙewar ruwa, gabaɗaya magana, don danko iri ɗaya da kuma nau'i mai kyau na methyl cellulose ether, a cikin yanayin adadin adadin adadin, mafi kyawun sakamako na riƙewar ruwa ya fi kyau.
Riƙewar ruwa na HPMC kuma yana da alaƙa da yanayin zafin amfani, kuma riƙewar ruwa na methyl cellulose ether yana raguwa tare da haɓakar zafin jiki. Amma a cikin ainihin kayan aikace-aikacen, yawancin mahalli na busassun turmi sau da yawa za su kasance a cikin babban zafin jiki (fiye da digiri 40) a ƙarƙashin yanayin ginin a cikin zafi mai zafi, irin su rani insolation na bangon bangon waje na plastering, wanda sau da yawa ya kara ƙarfafa ciminti da bushewar turmi. Rage yawan riƙewar ruwa yana haifar da tabbataccen jin cewa duka haɓakawa da juriya suna shafar. A cikin wannan yanayin, rage tasirin abubuwan zafin jiki ya zama mahimmanci musamman. Ko da yake ana ɗaukar ƙari na methyl hydroxyethyl cellulose ether a matsayin kan gaba wajen ci gaban fasaha, dogaro da zafin jiki har yanzu zai haifar da raunana kaddarorin busassun turmi. Ko da tare da karuwa na methyl hydroxyethyl cellulose sashi (nau'in lokacin rani), ginin da juriya na fata har yanzu ba zai iya biyan bukatun amfani ba. Ta hanyar wasu jiyya na musamman na MC, irin su ƙara darajar etherification, tasirin riƙewar ruwa na MC zai iya kula da sakamako mafi kyau a ƙarƙashin babban zafin jiki, don haka zai iya samar da mafi kyawun aiki a ƙarƙashin yanayi mai tsanani.
Lokacin aikawa: Mayu-18-2022