Tunda halayen hydroxypropyl methylcellulose suna kama da sauran ethers masu narkewa cikin ruwa, ana iya amfani da shi a cikin murfin emulsion da abubuwan da ke rufe resin mai narkewa cikin ruwa azaman wakili mai samar da fim, mai kauri, emulsifier da stabilizer, da sauransu, wanda ke ba fim ɗin murfin kyakkyawan juriya ga gogewa. Rufi iri ɗaya da mannewa, da inganta tashin hankali a saman, kwanciyar hankali ga acid da tushe, da kuma dacewa da launukan ƙarfe.
Tunda HPMC tana da mafi girman ma'aunin gel fiye da MC, tana kuma da juriya ga harin ƙwayoyin cuta fiye da sauran ƙwayoyin cellulose, don haka ana iya amfani da ita azaman mai kauri don shafa mai a cikin ruwa. HPMC yana da kyakkyawan kwanciyar hankali na adana ɗanko da kuma kyakkyawan narkewar sa, don haka HPMC ya dace musamman a matsayin mai watsawa a cikin shafa mai a cikin ruwa.
Yadda ake amfani da hydroxypropyl methyl cellulose a masana'antar rufewa shine kamar haka.
1. Tsarin ɗankowa iri-iri na HPMC, juriya ga lalacewar fenti, bayanin hana ƙwayoyin cuta, juriya ga wankewa da kwanciyar hankali ga acid da tushe sun fi kyau; Hakanan ana iya amfani da shi azaman mai cire fenti wanda ke ɗauke da methanol, ethanol, propanol, isopropyl alcohol, ethylene glycol, acetone, methyl ethyl ketone ko mai kauri daga barasa diketone; Rufin da aka ƙera na HPMC yana da kyakkyawan gogewa mai laushi; HPMC fiye da HEC da EHEC da CMC kamar yadda HPMC ke da tasiri mafi kyau fiye da HEC da EHEC da CMC a matsayin mai kauri daga fenti.
2. hydroxypropyl methyl cellulose da aka maye gurbinsa sosai yana da juriya ga harin ƙwayoyin cuta fiye da ƙarancin maye gurbinsa, kuma yana da kwanciyar hankali mai kyau a cikin masu kauri polyvinyl acetate. Sauran cellulose ethers suna cikin ajiya saboda lalacewar sarkar cellulose ether kuma yana rage dankowar rufin.
3. Mai cire fenti na iya zama HPMC mai narkewa cikin ruwa (inda methoxy yake tsakanin kashi 28% zuwa 32%, hydroxypropoxy shine kashi 7% zuwa 12%), dioxymethane, toluene, paraffin, ethanol, tsarin methanol, za a shafa shi a saman madaidaiciya, tare da ɗanko da canjin da ake buƙata. Wannan mai cire fenti yana cire yawancin fenti na feshi na gargajiya, varnishes, enamel, da wasu esters na epoxy, epoxy amides, catalyzed epoxy amides, acrylates, da sauransu. Ana iya cire fenti da yawa cikin daƙiƙa kaɗan, wasu fenti suna buƙatar mintuna 10 ~ 15 ko fiye, wannan mai cire fenti ya dace musamman ga saman katako.
4. Za a iya haɗa fenti mai narkewar ruwa da sassa 100 na launin da ba na halitta ba ko na halitta, sassa 0.5 ~ 20 na alkyl cellulose ko hydroxyalkyl cellulose mai narkewar ruwa da sassa 0.01 ~ 5 na polyoxyethylene ether ko ether ester. Misali, ana samun mai canza launi ta hanyar haɗa sassa 1.5 na HPMC, sassa 0.05 na polyethylene glycol alkyl phenyl ether, sassa 99.7 na titanium dioxide da sassa 0.3 na carbon black. Sannan ana haɗa cakuda da sassa 100 na polyvinyl acetate mai ƙarfi 50% don samun murfin, kuma babu bambanci tsakanin fim ɗin rufewa busasshe da aka yi ta hanyar shafa shi a kan takarda mai kauri da goge shi kaɗan da goga.
Lokacin Saƙo: Mayu-20-2022