Sunan HPMC na kasar Sin shine hydroxypropyl methylcellulose. Ba shi da ionic kuma ana amfani da shi sau da yawa azaman wakili mai riƙe ruwa a cikin turmi mai gauraye. Shi ne kayan da aka fi amfani da shi wajen riƙe ruwa a turmi. Samfurin ether wanda aka samo daga polysaccharide wanda aka samar ta hanyar alkalization da etherification. Ba shi da caji da kansa, baya amsawa da ions da aka caji a cikin kayan gelling, kuma yana da aiki mai ƙarfi. Farashin kuma ya fi ƙasa da sauran nau'ikan cellulose ethers, don haka ana amfani da shi sosai a cikin turmi mai gauraye busasshe.
Aikin hydroxypropyl methylcellulose: Yana iya kauri turmi da aka gauraya sabo don samun ɗanɗano mai laushi da kuma hana rabuwa. (Kauri) Rike ruwa shi ma muhimmin siffa ne, wanda ke taimakawa wajen kiyaye adadin ruwan da ba shi da matsala a cikin turmi, don haka bayan an gina turmi, kayan siminti suna da ƙarin lokaci don yin ruwa. (Rike ruwa) Yana da kaddarorin shiga iska, wanda zai iya gabatar da kumfa mai kyau da iska mai kyau don inganta ginin turmi.
Mafi girman danko na hydroxypropyl methylcellulose ether, haka nan ingancin riƙe ruwa yake. Ga wannan samfurin, sakamakon danko da aka auna ta hanyoyi daban-daban ya bambanta sosai, kuma wasu ma suna da bambance-bambance ninki biyu. Saboda haka, lokacin kwatanta danko, dole ne a yi shi tsakanin hanyoyin gwaji iri ɗaya, gami da zafin jiki, rotor, da sauransu.
Dangane da girman barbashi, gwargwadon yadda barbashi ya fi kyau, haka nan ma riƙe ruwa zai fi kyau. Bayan manyan barbashi na cellulose ether suka haɗu da ruwa, saman zai narke nan take ya samar da gel don naɗe kayan don hana ƙwayoyin ruwa ci gaba da shiga. Wani lokaci ba za a iya warwatse shi gaba ɗaya ba ko da bayan an daɗe ana juyawa, yana samar da ruwan da ke ɗauke da gajimare ko haɗuwa. Yana shafar riƙewar ruwa na cellulose ether, kuma narkewa yana ɗaya daga cikin abubuwan da ke haifar da zaɓar cellulose ether. Tsafta kuma muhimmin ma'aunin aiki ne na methyl cellulose ether. Ana buƙatar MC da ake amfani da shi don busasshen turmi ya zama foda, tare da ƙarancin ruwa, kuma tsafta kuma yana buƙatar kashi 20-60% na girman barbashi ya zama ƙasa da 63um. Tsaftacewar tana shafar narkewar hydroxypropyl methylcellulose ether. Tsaftacewar MC yawanci tana da granular, kuma tana da sauƙin narkewa a cikin ruwa ba tare da haɗuwa ba, amma ƙimar narkewar tana da jinkiri sosai, don haka bai dace da amfani da shi a cikin busasshen turmi na foda ba. A cikin busasshen turmi na foda, MC yana bazuwa tsakanin kayan siminti kamar su tarawa, filler mai kyau da siminti, kuma foda mai kyau kawai zai iya guje wa haɗakar methyl cellulose ether lokacin haɗawa da ruwa.
Gabaɗaya dai, idan girman danko ya yi yawa, to tasirin riƙe ruwa zai fi kyau. Duk da haka, idan girman danko ya yi yawa da kuma girman nauyin kwayoyin halitta na MC, raguwar narkewar sa zai yi mummunan tasiri ga ƙarfi da aikin ginin turmi. Yayin da girman danko ya yi yawa, to tasirin kauri a turmi zai bayyana, amma ba daidai yake ba. Yayin da girman danko ya yi yawa, tofin da ya yi yawa zai yi yawa, wato, yayin gini, yana bayyana a matsayin manne wa abin gogewa da kuma mannewa mai yawa ga substrate. Amma ba shi da amfani a ƙara ƙarfin tsarin turmi da ya yi yawa. Wato, yayin gini, aikin hana sag ba a bayyane yake ba. Akasin haka, wasu ethers na matsakaici da ƙarancin danko amma waɗanda aka gyara suna da kyakkyawan aiki wajen inganta ƙarfin tsarin turmi da ya yi yawa.
Rikewar ruwa na HPMC yana da alaƙa da zafin da ake amfani da shi, kuma riƙewar ruwa na methyl cellulose ether yana raguwa tare da ƙaruwar zafin jiki. Duk da haka, a aikace-aikacen kayan aiki na gaske, ana amfani da turmi busasshe a kan abubuwan da ke da zafi a yanayin zafi mai yawa (fiye da digiri 40) a wurare da yawa, kamar shafa fenti na bangon waje a ƙarƙashin rana a lokacin rani, wanda sau da yawa yana hanzarta Warkewa da kuma taurare busasshen turmi na foda. Ragewar yawan riƙe ruwa yana haifar da jin cewa juriyar aiki da tsagewa suna shafar, kuma yana da matuƙar mahimmanci a rage tasirin abubuwan zafin jiki a ƙarƙashin wannan yanayin. A wannan yanayin, ana ɗaukar ƙarin methyl hydroxyethyl cellulose ether a matsayin a sahun gaba a ci gaban fasaha. Kodayake adadin methyl hydroxyethyl cellulose ya ƙaru (tsarin bazara), ƙarfin aiki da juriyar tsagewa har yanzu ba za su iya biyan buƙatun amfani ba. Ta hanyar wasu jiyya na musamman akan MC, kamar ƙara matakin etherification, da sauransu, ana iya kiyaye tasirin riƙe ruwa a mafi girman zafin jiki, don haka zai iya samar da ingantaccen aiki a ƙarƙashin yanayi mai wahala.
Gabaɗaya, HPMC tana da zafin gel, wanda za a iya raba shi zuwa nau'ikan 60, nau'ikan 65, da nau'ikan 75. Ga kamfanonin da ke amfani da yashi na kogi don turmi mai gauraye na yau da kullun, ya fi kyau a yi amfani da HPMC mai nau'in 75 tare da zafin gel mai yawa. Bai kamata yawan HPMC ya yi yawa ba, in ba haka ba zai ƙara buƙatar ruwa na turmi, zai manne da trowel, kuma lokacin saitawa zai yi tsayi da yawa, wanda zai shafi iya ginawa. Kayayyakin turmi daban-daban suna amfani da HPMC tare da viscosities daban-daban, kuma ba sa amfani da HPMC mai viscosity mai yawa a hankali. Saboda haka, kodayake samfuran hydroxypropyl methylcellulose suna da kyau, ana yaba musu idan aka yi amfani da su da kyau. Zaɓar HPMC da ya dace shine babban alhakin ma'aikatan dakin gwaje-gwaje na kasuwanci.
Lokacin Saƙo: Afrilu-12-2023