1. Menene babban aikace-aikacenhydroxypropyl methylcellulose (HPMC)?
Ana amfani da HPMC sosai a cikin kayan gini, sutura, resins na roba, yumbu, magunguna, abinci, yadi, noma, kayan kwalliya, taba da sauran masana'antu. Ana iya raba HPMC zuwa matakin gini, darajar abinci da kuma darajar magunguna bisa ga manufar. A halin yanzu, yawancin samfuran cikin gida sune darajar gini. A cikin aikin gine-gine, ana amfani da foda mai yawa a cikin adadi mai yawa, kimanin kashi 90% ana amfani da foda, sauran kuma ana amfani da turmi siminti.
2. Menene kamshin hydroxypropyl methylcellulose (HPMC)?
The HPMC samar da sauran ƙarfi hanya amfani da toluene da isopropanol a matsayin kaushi. Idan wankan bai yi kyau sosai ba, za a sami ɗan ƙamshi.
3. Menene hanyoyin rushewar hydroxypropyl methylcellulose (HPMC)?
Hanyar narkar da ruwan zafi: Tun da HPMC ba ta narke cikin ruwan zafi, ana iya rarraba HPMC daidai a cikin ruwan zafi a matakin farko, sannan kuma da sauri ya narke lokacin da aka sanyaya. Hanyoyi guda biyu na al'ada an bayyana su kamar haka:
1) Sanya adadin ruwan zafi da ake buƙata a cikin akwati kuma yayi zafi zuwa kimanin 70 ° C. A hankali an ƙara hydroxypropyl methylcellulose a ƙarƙashin jinkirin motsawa, da farko HPMC ya yi iyo a saman ruwa, sannan a hankali ya samar da slurry, wanda aka sanyaya a ƙarƙashin motsawa.
2), ƙara 1/3 ko 2/3 na adadin da ake buƙata na ruwa a cikin akwati, kuma zafi shi zuwa 70 ° C, watsar da HPMC bisa ga hanyar 1), da kuma shirya slurry ruwan zafi; sa'an nan kuma ƙara sauran adadin ruwan sanyi zuwa ruwan zafi mai zafi, an sanyaya cakuda bayan ya motsa.
Yadda ake hada foda: a haxa garin HPMC da sauran abubuwa masu yawa na gari, sai a gauraya sosai da mahautsini, sannan a zuba ruwa ya narke, sannan HPMC za a iya narkar da ita a wannan lokaci ba tare da tabarbarewa ba, domin akwai HPMC kadan a kowane dan kankanin lungu Foda, za ta narke nan da nan idan aka hadu da ruwa. ——Masu kera foda da turmi suna amfani da wannan hanyar. [Hydroxypropyl methylcellulose (HPMC) ana amfani dashi azaman mai kauri da mai riƙe da ruwa a cikin turmi foda na putty. ]
4. Yadda za a yi hukunci da ingancin hydroxypropyl methylcellulose (HPMC) a sauƙaƙe da fahimta?
(1) Fari: Ko da yake fari ba zai iya tantance ko HPMC yana da sauƙin amfani ba, kuma idan an ƙara abubuwan da ake amfani da su a lokacin aikin samarwa, zai shafi ingancinsa. Duk da haka, yawancin samfurori masu kyau suna da fari mai kyau.
(2) Lalacewa: Mafi kyawun HPMC gabaɗaya yana da raga 80 da raga 100, kuma raga 120 ya ragu. Yawancin HPMC da aka samar a Hebei raga 80 ne. Mafi kyawun ingancin, gabaɗaya magana, mafi kyau.
(3) Hasken watsawa: sakahydroxypropyl methylcellulose (HPMC)a cikin ruwa don samar da colloid mai haske, da kuma duba haskensa. Mafi girman watsa hasken, mafi kyau, yana nuna cewa akwai ƙananan insoluble a ciki. . The permeability na a tsaye reactors ne gaba ɗaya mai kyau, kuma na kwance reactors ya fi muni, amma ba yana nufin cewa ingancin reactors a tsaye ya fi na kwance reactors, kuma samfurin ingancin da aka ƙaddara da yawa dalilai.
(4) Takamaiman nauyi: Girman ƙayyadaddun nauyi, mafi nauyi mafi kyau. Ƙayyadaddun ƙayyadaddun yana da girma, gabaɗaya saboda abun ciki na ƙungiyar hydroxypropyl a ciki yana da girma, kuma abun ciki na ƙungiyar hydroxypropyl yana da girma, riƙewar ruwa ya fi kyau.
5. Menene bambanci tsakanin nau'in ruwan sanyi mai sanyi da nau'in zafi mai narkewa na hydroxypropyl methylcellulose a cikin tsarin samarwa?
Nau'in watsawa mai sauri na HPMC ana yi masa magani da glioxal, kuma yana watsewa da sauri cikin ruwan sanyi, amma ba ya narke da gaske. Yana narkewa ne kawai lokacin da danko ya karu. Nau'in nan take ba shi da jiyya ta sama tare da glioxal. Idan adadin glycoxal yana da girma, tarwatsawa zai yi sauri, amma danko zai karu a hankali, kuma idan adadin ya kasance ƙananan, akasin haka zai zama gaskiya.
6. Menene madaidaicin danko na hydroxypropyl methylcellulose (HPMC)?
Matsakaicin foda yana da yuan 100,000, kuma buƙatun turmi sun fi girma, kuma ana buƙatar yuan 150,000 don sauƙin amfani. Bugu da ƙari, mafi mahimmancin aikin HPMC shine riƙe ruwa, wanda ya biyo baya tare da kauri. A cikin foda mai sakawa, idan dai ruwa yana da kyau kuma danko yana da ƙananan (70,000-80,000), yana yiwuwa kuma. Tabbas, mafi girman danko, mafi kyawun riƙewar ruwa. Lokacin da danko ya wuce 100,000, danko zai shafi riƙewar ruwa. Ba yawa kuma.
7. Menene manyan alamun fasaha na hydroxypropyl methylcellulose (HPMC)?
Abun ciki na Hydroxypropyl da danko, yawancin mutane sun damu da waɗannan alamomi guda biyu. Wadanda ke da babban abun ciki na hydroxypropyl gabaɗaya suna da mafi kyawun riƙe ruwa. Wanda ke da babban danko yana da mafi kyawun riƙe ruwa, in mun gwada da (ba cikakke ba), kuma wanda ke da ɗanko mai ƙarfi ya fi amfani da turmi siminti.
8. Menene manyan albarkatun kasa na hydroxypropyl methylcellulose (HPMC)?
Babban albarkatun kasa na hydroxypropyl methylcellulose (HPMC): mai ladabi auduga, methyl chloride, propylene oxide, da sauran albarkatun kasa, caustic soda, acid, toluene, isopropanol, da dai sauransu.
9. Menene babban aikin aikace-aikacenHPMCa putty foda, kuma yana faruwa ne a sinadarai?
A cikin putty foda, HPMC tana taka rawar uku na kauri, riƙe ruwa da gini.
Kauri: Za a iya kauri cellulose don dakatarwa da kuma kiyaye maganin daidai sama da ƙasa, da tsayayya da sagging.
Riƙewar ruwa: sanya foda ta bushe a hankali, kuma ta taimaka wa ash calcium don amsawa ƙarƙashin aikin ruwa.
Gina: Cellulose yana da sakamako mai lubricating, wanda zai iya sa foda na putty yana da kyakkyawan gini.
Ƙara ruwa a cikin foda da kuma sanya shi a kan bango wani nau'i ne na sinadaran, saboda an samar da sababbin abubuwa. Idan ka cire foda da ke jikin bango daga bangon, ka niƙa shi ya zama foda, ka sake amfani da shi, ba zai yi aiki ba saboda an samu sababbin abubuwa (calcium carbonate). ) kuma.
Babban abubuwan da ke cikin ash calcium foda sune: cakuda Ca (OH) 2, CaO da ƙananan CaCO3, CaO + H2O = Ca (OH) 2-Ca (OH) 2 + CO2 = CaCO3↓ + H2O Ash calcium yana cikin ruwa da iska Karkashin aikin CO2, ana samar da calcium carbonate, yayin da HPMC kawai yana riƙe da ruwa kuma yana taimakawa wajen amsawa.
10. HPMC ba ionic cellulose ether, don haka menene wanda ba ionic?
A cikin ma'anar layman, wadanda ba ions abubuwa ne waɗanda ba sa ionize cikin ruwa. Ionization yana nufin tsarin da ake rarraba electrolyte zuwa ions da aka caje wanda zai iya motsawa cikin yardar kaina a cikin wani ƙayyadadden ƙarfi (kamar ruwa, barasa). Misali, sodium chloride (NaCl), gishirin da muke ci kowace rana, yana narkar da ruwa da ionizes don samar da ions sodium ions (Na+) masu motsi da yardar rai da kuma chloride ions (Cl) waɗanda aka caje su. Wato lokacin da aka sanya HPMC a cikin ruwa, ba zai rabu da ions da aka caje ba, amma ya kasance a cikin nau'in kwayoyin halitta.
11. Menene zazzabi na gel na hydroxypropyl methylcellulose da ke da alaƙa?
Zazzabi na gel na HPMC yana da alaƙa da abun ciki na methoxy, ƙananan abun ciki na methoxy, mafi girman zafin gel ɗin.
12. Shin akwai wata dangantaka tsakanin digo na putty foda da HPMC?
Asarar foda na putty foda yana da alaƙa da ingancin ash calcium, kuma ba shi da alaƙa da HPMC. Ƙananan abun ciki na calcium mai launin toka mai launin toka da daidaitaccen rabo na CaO da Ca (OH) 2 a cikin launin toka zai haifar da asarar foda. Idan yana da wani abu da HPMC, to, idan HPMC ba shi da rashin isasshen ruwa, zai haifar da asarar foda.
13. Menene bambanci tsakanin nau'in ruwan sanyi mai sanyi da nau'in zafi mai narkewa na hydroxypropyl methylcellulose a cikin tsarin samarwa?
Nau'in watsawa mai sauri naHPMCana yi masa magani da glioxal, kuma yana watsewa da sauri cikin ruwan sanyi, amma ba ya narke da gaske. Yana narkewa ne kawai lokacin da danko ya karu. Nau'in nan take ba shi da jiyya ta sama tare da glioxal. Idan adadin glycoxal yana da girma, tarwatsawa zai yi sauri, amma danko zai karu a hankali, kuma idan adadin ya kasance ƙananan, akasin haka zai zama gaskiya.
Lokacin aikawa: Afrilu-25-2024