Mafi girman danko naHPMCIdan aka yi amfani da hydroxypropyl methyl cellulose, to aikin riƙe ruwa zai fi kyau. Danko muhimmin siga ne na aikin HPMC. A halin yanzu, masana'antun HPMC daban-daban suna amfani da hanyoyi da kayan aiki daban-daban don tantance danko na HPMC. Manyan hanyoyin sune Haake Rotovisko, Hoppler, Ubbelohde da Brookfield, da sauransu.
Ga samfurin iri ɗaya, sakamakon danko da aka auna ta hanyoyi daban-daban ya bambanta sosai, wasu ma bambance-bambance ne da yawa. Saboda haka, lokacin kwatanta danko, dole ne a yi shi tsakanin hanyar gwaji ɗaya, gami da zafin jiki, rotor, da sauransu.
Ga girman barbashi, gwargwadon yadda barbashi ya fi ƙanƙanta, haka nan ma riƙe ruwa zai fi kyau. Manyan barbashi na cellulose ether suna hulɗa da ruwa, saman nan take yana narkewa ya samar da gel don naɗe kayan don hana ƙwayoyin ruwa ci gaba da shiga, wani lokacin juyawa na dogon lokaci ba za a iya wargaza su daidai ba, samuwar maganin flocculent mai laka ko agglomerate. Narkewar cellulose ether yana ɗaya daga cikin abubuwan da ake zaɓar cellulose ether. Narkewa kuma muhimmin ma'aunin aiki ne na methyl cellulose ether. MC don busasshen turmi yana buƙatar foda, ƙarancin ruwa, da kuma narkewa na 20% ~ 60% girman barbashi ƙasa da 63um. Narkewa yana shafar narkewaHPMChydroxypropyl methyl cellulose ether. MC mai kauri yawanci yana da kauri kuma ana iya narkewa cikin ruwa cikin sauƙi ba tare da haɗa shi ba, amma saurin narkewa yana da jinkiri sosai, don haka bai dace da amfani da shi a cikin busasshen turmi ba. A cikin busasshen turmi, MC yana bazuwa tsakanin tarawa, fillers masu kyau da kayan siminti kamar siminti, kuma foda wanda ya isa ya isa ya guji taruwar methyl cellulose ether lokacin da ake haɗuwa da ruwa. Lokacin da MC ya ƙara ruwa don narke agglomerate, yana da matukar wahala a warwatse da narke shi. MC mai kauri ba wai kawai yana ɓatarwa ba, har ma yana rage ƙarfin turmi na gida. Lokacin da aka gina irin wannan busasshen turmi a babban yanki, saurin warkar da turmi busasshe na gida yana raguwa sosai, wanda ke haifar da fashewa sakamakon lokacin warkarwa daban-daban. Don turmi feshi na inji, saboda ɗan gajeren lokacin haɗawa, ƙayyadadden ya fi girma.
Gabaɗaya dai, idan girman danko ya fi yawa, to tasirin riƙe ruwa ya fi kyau. Duk da haka, idan girman danko ya fi yawa, to girman nauyin kwayoyin halitta na MC ya fi yawa, kuma aikin narkewar zai ragu daidai gwargwado, wanda ke da mummunan tasiri ga ƙarfi da aikin gini na turmi. Yayin da girman danko ya fi yawa, to tasirin kauri na turmi ya fi bayyana, amma ba ya daidai da alaƙar. Yayin da girman danko ya fi girma, tofin da ya fi danshi zai fi mannewa, duka ginin, aikin scraper mai mannewa da kuma mannewa mai yawa ga kayan tushe. Amma ba shi da amfani a ƙara ƙarfin tsarin turmi da ya fi danshi. A lokacin gini, aikin hana sag ba a bayyane yake ba. Akasin haka, wasu ƙananan danko amma methyl cellulose ethers suna da kyakkyawan aiki wajen inganta ƙarfin tsarin turmi da ya fi danshi.
Da zarar an ƙara cellulose ether a cikin turmi, to, ingancin riƙe ruwa zai fi kyau, mafi girman ɗanko, mafi kyawun aikin riƙe ruwa.
Fineness na HPMC yana da wani tasiri akan riƙewar ruwa, gabaɗaya, don irin wannan danko da kuma bambancin fineness na methyl cellulose ether, idan aka ƙara adadin, fineness na riƙewar ruwa ya fi kyau.
Rike ruwa na HPMC yana da alaƙa da zafin amfani, kuma riƙe ruwa na methyl cellulose ether yana raguwa tare da hauhawar zafin jiki. Amma a cikin ainihin aikace-aikacen kayan, yawancin yanayi na busasshen turmi galibi suna cikin zafin jiki mai yawa (fiye da digiri 40) a ƙarƙashin yanayin gini a cikin substrate mai zafi, kamar rufewa a lokacin rani na fenti na bango na waje, wanda sau da yawa yana hanzarta ƙarfafa siminti da taurare busasshen turmi. Rage yawan riƙe ruwa yana haifar da jin cewa duka juriyar gini da tsagewa suna shafar. A cikin wannan yanayin, rage tasirin abubuwan zafin jiki yana da matuƙar mahimmanci. Kodayake ana ɗaukar ƙara methyl hydroxyethyl cellulose ether a matsayin kan gaba a ci gaban fasaha, dogaro da shi akan zafin jiki har yanzu zai haifar da rauni ga halayen turmi busasshe. Ko da tare da ƙaruwar adadin methyl hydroxyethyl cellulose (tsarin bazara), ginawa da juriyar tsagewa har yanzu ba za su iya biyan buƙatun amfani ba. Ta hanyar wasu jiyya na musamman na MC, kamar ƙara matakin etherification, tasirin riƙe ruwa na MC na iya kiyaye ingantaccen tasiri a ƙarƙashin zafin jiki mai yawa, don haka zai iya samar da ingantaccen aiki a ƙarƙashin yanayi mai wahala.
Lokacin Saƙo: Mayu-18-2022