Menene tasirin girman wari akan hydroxypropyl methylcellulose:
Maganar tahydroxypropyl methylcellulose: Bi da mai ladabi cellulose auduga da lye a 35-40 ° C na rabin sa'a, danna, murkushe cellulose, da kuma shekaru da kyau a 35 ° C, sabõda haka, matsakaicin digiri na polymerization na samu alkali ne a cikin da ake bukata kewayon zaruruwa a ciki. Saka alkali fiber a cikin kettle etherification, ƙara propylene oxide da methyl chloride a jere, kuma etherify a 50-80 ° C na 5 hours, matsakaicin matsa lamba ne game da 1.8MPa. Sa'an nan kuma ƙara adadin da ya dace na hydrochloric acid da oxalic acid zuwa ruwan zafi a 90 ° C don wanke kayan don fadada ƙarar. Dehydrate a cikin centrifuge. A wanke da ruwa har sai tsaka tsaki. Lokacin da danshi na kayan ya kasance ƙasa da 60%, bushe shi tare da rafi mai zafi a 130 ° C har sai abun ciki ya kasance ƙasa da 5%.
The HPMC samar da sauran ƙarfi hanya amfani da toluene da isopropanol a matsayin kaushi. Idan wankan bai yi kyau ba, wani ƙamshi mai laushi zai ragu. A halin yanzu, ingancin gida hydroxypropyl methylcellulose HPMC ya bambanta sosai, kuma farashin ya bambanta sosai, yana sa abokan ciniki su yi zaɓin da ya dace. Wannan ita ce matsalar aikin wanke-wanke, ba ya shafar amfani kuma babu matsala, HPMC mai tsabta kada ya wari ammonia, sitaci da barasa; ZinaHPMCsau da yawa yana iya jin kamshin kowane irin wari, ko da ba shi da ɗanɗano, zai ji nauyi. Duk da haka, hydroxypropyl methylcellulose da masana'antun da yawa ke samarwa yana da ƙaƙƙarfan ƙamshi musamman da ƙamshi. Haƙiƙa ingancin bai kai daidai ba.
Ana samun Hypromellose ta hanyar lalata auduga mai ladabi tare da ruwa mai wuya don samun cellulose na alkaline, sannan ƙara ƙarfi, wakili na etherification, toluene, da isopropanol don amsawar etherification, wankewa, bushewa, murƙushewa, da sauransu don samun samfuran ƙãre. To, za a sami wari, don haka masu amfani za su iya amfani da shi tare da amincewa.
Lokacin aikawa: Afrilu-25-2024