HPMC (Hydroxypropyl methylcelrose) shine abin da aka saba amfani da kayan polymer wanda aka saba amfani dashi wanda aka yi amfani dashi sosai a cikin gini, abinci, sunadarai yau da kullun da sauran filayen. Dangane da karuwarta cikin ruwa, ana iya raba shi zuwa nau'in sanyi na ruwa mai ruwan sanyi da nau'in narke na ruwa. Akwai bambance-bambance masu mahimmanci a cikin samar da waɗannan nau'in HPMC guda biyu.
(1), sarrafa kayan aiki
1. Nau'in ruwan sanyi
A cikin samar da hpmc mai sanyi na ruwan sanyi, da albarkatun ƙasa da farko suna buƙatar presiredated. Kayan kayan abinci gaba daya sun hada da cellulose, methanol, propylelene oxide, methyl chrilide, da sauransu suna buƙatar tabbatar da daidaituwa da kuma hadewar da aka dauki. Musamman, lura da celulose yana buƙatar bushewa da tsananin bushewa don cimma rarraba girman barbashi da ya dace.
2. Nau'in narke mai zafi
Zafi-narke hpmc yayi kama da hpmc mai sanyi-ruwa dangane da kayan aiki na kayan aiki, amma yana da buƙatu masu girma don sarrafa sel. Saboda tsananin zafi-da ake buƙata don amsawa a yanayin zafi, tsarkakakkiyar da barbashi girman selulose suna da tasiri mafi mahimmanci akan aiwatar da aikin. Yawancin lokaci dole ne don amfani da sel mai ƙarfi, kuma dole ne a sarrafa shi sosai a lokacin murƙushewa.
(2), kira da aka amsa
1. Nau'in ruwan sanyi
A synthesis dauki na ruwan sanyi na ruwan sanyi yawanci ana aiwatar da shi a cikin zafin jiki, da aka sarrafa shi a digiri na 20-50 Celsius. A lokacin aiwatar da aikin, sel da aka fara yi da shi a karkashin yanayin alkaline don a wani satar kwayar cutar sel sel serewararrun kwayar halitta da ke haifar da kungiyoyin hydroxyl kyauta. Bayan haka, mai martaba kamar methanol, propylelelene opyl chloride an ƙara a karkashin yanayi mai amfani don yin amsawa ga eThoration don yin amsawa. Dukkanin aikin aikin yana buƙatar ingantaccen iko na zazzabi da pH don tabbatar da daidaituwa da kwanciyar hankali na samfurin.
2. Nau'in narke mai zafi
A synthesis dauki na zafi-narke hpmc ne da za'ayi a babban yanayin zafi, gabaɗaya digiri 50-80 Celsius ko ma sama. Tsarin dauki yayi kama da nau'in ruwan sanyi, amma saboda saurin isar da yanayin zafin jiki da kuma lokacin amsawa da ake buƙata. A babban yanayin zafi, hydrolysis da etradoaddamar da selulosiction na sel ya zama cikakke, kuma nauyin nauyin samfurin ya fi dacewa.
(3) tsari na sarrafawa
1. Nau'in ruwan sanyi
Bayan kira na hepmc na ruwan sanyi wanda aka kammala, ana buƙatar jerin matakan sarrafa bayan-aiki. Na farko shine karar tsinkaye don cire abubuwa da alkaline a cikin cakuda. Anyi da wanka da wanki ana yin su don cire kayan da ba a haɗa su ba da kuma samfuran samfurori. Mataki na ƙarshe yana bushewa da kuma pultionsizing. Samfurin ya bushe ne don sarrafa danshi abun ciki, sannan kuma pulved zuwa girman ƙwayar da ya dace don samun samfurin da aka gama.
2. Nau'in narke mai zafi
Tsarin jiyya na post na zafi na zafi-hpmc shine m cakuda mai sanyi-sanyi. Koyaya, saboda tsananin zafin jiki da aka yi amfani da shi a cikin aiwatar da aikin, danshi abun ciki na samfurin yana da ƙarancin kuma tsarin bushewa yana da sauƙi. Bugu da kari, zafi-narke yana buƙatar biyan ƙarin hankali don sarrafa zafin jiki na murƙushewa yayin murƙushewa don magance yanayin aikin saboda babban zazzabi.
(4), aiki da aikace-aikace
Ana amfani da hpmc nan da nan HPMC da aka yi amfani da shi a cikin filayen da ke buƙatar samuwar fim mai sauri ko thickening, da sauransu saboda rushewa da saurin sa a cikin ruwan sanyi. Abubuwan mallakar samarwa suna da matukar girma, musamman ikon da yanayin dauki a yanayin zafi.
Zafi-narke hpmc ya fi dacewa da aikace-aikace a karkashin yanayin zazzabi, kamar tial m, petty foda, da sauransu, saboda sa sosai ƙima. Kwargwadon samarwa yana da sauki, amma yana da babban buƙatu a kan tsarkin albarkatun ƙasa da sarrafa yanayin zafin jiki.
Babban bambanci a cikin tsarin samarwa tsakanin ruwan sanyi nan da nan-nau'in da zafi-da ke haifar da bambance-bambance a cikin albarkatun ƙasa, wanda kai tsaye ke shafar bambance-bambance da tsarin aikin. Tsarin ruwan sanyi na ruwan sanyi yana buƙatar amsawa a cikin zafin jiki kaɗan kuma yana da buƙatu masu girma don yawan zafin jiki da kuma nazarin zafi mai amfani da shi a kan tsarkin albarkatu da kuma sarrafa zazzabi. Su biyu ma sun bambanta takamaiman filayen aikace-aikacen, kuma kowannensu yana taka muhimmiyar rawa.
Lokaci: Feb-17-2025