Ƙananan danko: Ana amfani da 400 galibi don turmi mai daidaita kansa, amma galibi ana shigo da shi daga ƙasashen waje.
Dalili: Ƙananan danko, rashin ruwa mai kyau, amma kyawawan halayen daidaita su, yawan turmi mai yawa.
Matsakaici da ƙarancin ɗanko: 20000-40000 galibi ana amfani da shi don manne tayal, wakilin caulking, turmi mai hana fashewa, turmi mai ɗaurewa na thermal insulation, da sauransu.
Dalilai: Ingantaccen aiki, ƙarancin ruwa da aka ƙara, da kuma yawan turmi.
1. Menene manyan amfani da hydroxypropyl methylcellulose (HPMC)?
——A: Ana amfani da HPMC sosai a fannin kayan gini, fenti, resin roba, yumbu, magani, abinci, yadi, noma, kayan kwalliya, taba da sauran masana'antu. Ana iya raba HPMC zuwa: matakin gini, matakin abinci da kuma matakin magunguna bisa ga amfani. A halin yanzu, yawancin kayayyakin gida suna da matakin gini. A matakin gini, ana amfani da foda putty sosai, kusan kashi 90% ana amfani da shi don foda putty, sauran kuma ana amfani da shi don turmi da manne na siminti.
2. Nau'o'in hydroxypropyl methylcellulose (HPMC) nawa ne? Menene amfanin su?
——A: Ana iya raba HPMC zuwa nau'in narkewa nan take da nau'in narkewa mai zafi. Kayayyakin nan take suna watsuwa da sauri a cikin ruwan sanyi kuma suna ɓacewa a cikin ruwa. Ruwan ba shi da ɗanko a wannan lokacin saboda HPMC yana warwatse ne kawai a cikin ruwa kuma ba ya narkewa da gaske. Bayan kimanin mintuna 2, ɗankowar ruwan yana ƙaruwa a hankali kuma ana samun colloid mai haske. Kayayyakin da ke narkewa da zafi na iya warwatse da sauri a cikin ruwan zafi kuma su ɓace a cikin ruwan zafi lokacin da suka haɗu da ruwan sanyi. Lokacin da zafin ya faɗi zuwa wani zafin jiki (samfurin kamfaninmu yana da digiri 65 Celsius), ɗankowar yana bayyana a hankali har sai an sami colloid mai haske mai haske. Ana iya amfani da nau'in narkewa mai zafi kawai don foda da turmi. A cikin manne da fenti na ruwa, haɗuwa za ta faru kuma ba za a iya amfani da ita ba. Nau'in nan take yana da fa'idodi da yawa. Ana iya amfani da shi don foda narkewa, turmi, manne na ruwa, da fenti ba tare da wani dalili ba.
3. Waɗanne hanyoyi ne narke hydroxypropyl methylcellulose (HPMC)?
——Amsa: Hanyar narkar da ruwan zafi: Tunda HPMC ba ya narkewa a cikin ruwan zafi, ana iya wargaza HPMC daidai gwargwado a cikin ruwan zafi a matakin farko kuma yana narkewa da sauri bayan sanyaya. An bayyana hanyoyi guda biyu na yau da kullun a ƙasa:
1) A zuba ruwan zafi da ake buƙata a cikin akwati a dumama shi zuwa kimanin digiri 70 a digiri 100. A hankali a zuba hydroxypropyl methylcellulose a hankali a juya shi. Da farko HPMC yana shawagi a saman ruwa, sannan a hankali ya samar da wani abu mai laushi, sannan ya huce da juyawa.
2). Sai a zuba 1/3 ko 2/3 na adadin ruwan da ake buƙata a cikin akwati, a dumama shi zuwa 70°C, a watsa HPMC bisa ga hanyar da ke cikin 1), sannan a shirya ruwan zafi; sannan a zuba sauran ruwan sanyi a cikin ruwan zafi. A zuba a cikin ruwa, a gauraya sannan a sanyaya hadin.
Hanyar haɗa foda: A haɗa foda na HPMC da adadi mai yawa na sauran abubuwa masu ƙura, a gauraya sosai da injin niƙa, sannan a ƙara ruwa don ya narke. A wannan lokacin, HPMC za a iya narkar da shi kuma ba zai taru wuri ɗaya ba, saboda akwai ɗan ƙaramin HPMC a kowane yanki. Ƙaramin kusurwa. Foda yana narkewa nan da nan bayan ya taɓa ruwa. ——Masana'antun foda na Putty da turmi suna amfani da wannan hanyar. Ana amfani da Hydroxypropyl methylcellulose (HPMC) a matsayin mai kauri da kuma mai riƙe ruwa a cikin turmi na putty.
4. Ta yaya za a tantance ingancin hydroxypropyl methylcellulose (HPMC) cikin sauƙi da fahimta?
——Amsa: (1) Fari: Kodayake fari ba ya tantance ko HPMC yana da sauƙin amfani, idan an ƙara masu haske yayin aikin samarwa, zai shafi ingancinsa. Duk da haka, yawancin kayayyaki masu kyau suna da farin launi mai kyau. (2) Tsantsar siffa: Tsantsar siffa ta HPMC gabaɗaya raga ce ta 80 da raga 100, tare da raga 120 ƙasa da haka. Yawancin HPMC da aka samar a Hebei raga ce ta 80. Tsantsar siffa ce mafi kyau. (3) Watsa haske: Sanya hydroxypropyl methylcellulose (HPMC) a cikin ruwa don samar da colloid mai haske, kuma duba watsa haske. Girman watsa haske, mafi kyau, yana nuna cewa akwai ƙananan abubuwa marasa narkewa a ciki. Iskar da ke shiga cikin reactors a tsaye gabaɗaya ta fi ta reactors a kwance kyau, amma ba za a iya cewa ingancin reactors a tsaye ya fi na reactors a kwance kyau ba. Akwai dalilai da yawa da ke tantance ingancin samfur. (4) Takamaiman nauyi: Girman takamaiman nauyi da nauyi, mafi kyau. Yawanci nauyin da ke tattare da sinadarin hydroxypropyl yana faruwa ne saboda yawan sinadarin hydroxypropyl da ke cikinsa. Yawan sinadarin hydroxypropyl, haka nan yawan sinadarin zai fi kyau a riƙe shi.
5. Menene yawan sinadarin hydroxypropyl methylcellulose (HPMC) a cikin foda mai tsami?
——Amsa: Yawan HPMC a aikace-aikacensa ya bambanta dangane da yanayi, zafin jiki, ingancin sinadarin calcium na gida, da kuma dabarar shigarwa. foda ty da "ingancin da abokin ciniki ke buƙata". Gabaɗaya, yana tsakanin kilogiram 4 zuwa 5. Misali, yawancin foda putty a Beijing shine kilogiram 5; yawancin foda putty a Guizhou shine kilogiram 5 a lokacin rani da kilogiram 4.5 a lokacin hunturu;
6. Menene dacewar danko na hydroxypropyl methylcellulose (HPMC)?
——Amsa: Fulawar Putty gabaɗaya tana kashe yuan 100,000, kuma turmi yana buƙatar ƙari, don haka yuan 150,000 ya isa. Kuma mafi mahimmancin aikin HPMC shine riƙe ruwa, sannan kauri. A cikin foda putty, matuƙar yana da kyakkyawan riƙe ruwa da ƙarancin danko (70,000-80,000), babu matsala. Tabbas, mafi girman danko, mafi kyawun riƙe ruwa. Idan danko ya wuce 100,000, danko ba shi da tasiri sosai ga riƙe ruwa.
7. Menene manyan alamun fasaha na hydroxypropyl methylcellulose (HPMC)?
——A: Yawan sinadarin Hydroxypropyl da kuma yawan sinadarin da ke cikinsa, yawancin masu amfani da shi suna damuwa da waɗannan alamomi guda biyu. Mafi girman sinadarin hydroxypropyl, haka nan yawan sinadarin da ke cikinsa zai fi kyau. Idan aka yi amfani da sinadarin da ke cikinsa sosai, yawan sinadarin da ke cikinsa ya fi kyau (ba gaba ɗaya ba), kuma idan aka yi amfani da shi sosai, zai fi kyau a yi amfani da shi a turmi na siminti.
8. Menene manyan kayan da ake amfani da su wajen samar da sinadarin hydroxypropyl methylcellulose (HPMC)?
—— A: Manyan kayan da ake amfani da su wajen samar da hydroxypropyl methylcellulose (HPMC): auduga mai tsafta, methyl chloride, propylene oxide, sauran kayan da ake amfani da su sun hada da caustic soda, acid, toluene, isopropyl alcohol, da sauransu.
9. Menene babban aikin HPMC wajen amfani da foda na putty? Shin yana da wani tasiri na sinadarai?
——Amsa: HPMC yana da manyan ayyuka guda uku na kauri, riƙe ruwa da kuma ginawa a cikin foda putty. Kauri: Cellulose na iya kauri dakatarwa, kiyaye maganin iri ɗaya kuma yana tsayayya da lanƙwasawa. Riƙe ruwa: Sanya foda putty ya bushe a hankali kuma yana taimakawa wajen amsawar sinadarin launin toka a ƙarƙashin aikin ruwa. Ginawa: Cellulose yana da tasirin shafawa kuma yana iya sa foda putty ya sami kyakkyawan aiki. HPMC ba ya shiga cikin duk wani halayen sinadarai kuma yana taka rawa kawai. Lokacin da aka ƙara foda putty a cikin ruwa aka shafa a bango, za a sami amsawar sinadarai. Yayin da aka samar da sabon abu, ana cire foda putty a bango daga bango kuma a niƙa shi zuwa foda kafin amfani. Wannan ba ya aiki saboda an samar da sabon abu (calcium carbonate). Babban abubuwan da ke cikin foda mai launin toka sune: cakuda Ca(OH)2, CaO2 da ƙaramin adadin CaCO3, CaO+H2O=Ca(OH)2 -Ca(OH)2+CO2=CaCO3↓+H2O Calcium mai launin toka yana narkewa a cikin ruwa da iska CO2 A ƙarƙashin aikin calcium carbonate, HPMC yana riƙe ruwa kawai kuma yana taimaka wa calcium mai launin toka ya mayar da martani mafi kyau, kuma baya shiga cikin kowane martani da kansa.
10. HPMC wani sinadari ne na cellulose wanda ba ionic ba, to menene wanda ba ionic ba?
A: A taƙaice, abubuwan da ba ion ba sune abubuwan da ba sa yin ion a cikin ruwa. Ionization shine tsarin da electrolytes ke rabuwa zuwa ion masu caji masu motsi cikin 'yanci a cikin wasu sinadarai masu narkewa (misali, ruwa, barasa). Misali, sodium chloride (NaCl), gishirin da ake sha kowace rana, yana narkewa a cikin ruwa kuma yana yin ionizes, yana samar da ion sodium masu caji mai kyau (Na+) da ion chloride masu caji mara kyau (Cl). Wato, lokacin da aka sanya HPMC a cikin ruwa, ba ya rabuwa zuwa ion masu caji, amma yana wanzuwa a cikin siffa ta kwayoyin halitta.
Lokacin Saƙo: Fabrairu-06-2024