HPMC a cikin suturar Skim

Hydroxypropyl methyl cellulose (HPMC) danko don Skim gashi?

- amsa: Skim gashi yana da kyau fiye da HPMC 100000cps, wasu tsayin abin da ake buƙata a turmi, suna son ikon amfani da 150000cps. Bugu da ƙari, HPMC ita ce mafi mahimmancin aikin riƙewar ruwa, sannan kuma mai kauri. A cikin suturar Skim , idan dai ruwan riƙewar ruwa yana da kyau, danko yana da ƙananan (7-80000), kuma yana yiwuwa, ba shakka, danko ya fi girma, ƙwaƙwalwar dangi ya fi kyau, lokacin da danko ya fi 100. dubu, dankowar ajiyar ruwa ba shi da yawa.

Menene manyan alamun fasaha na hydroxypropyl methyl cellulose (HPMC)?

Amsa: abun ciki na Hydroxypropyl da danko, yawancin masu amfani suna kula da waɗannan alamomi guda biyu. Abun cikin hydroxypropyl yana da girma, riƙe ruwa gabaɗaya ya fi kyau. Danko, riƙewar ruwa, dangi (amma ba cikakke ba) kuma mafi kyau, kuma danko, turmi ciminti ya fi kyau a yi amfani da wasu.

Hydroxypropyl methyl cellulose (HPMC) menene babban albarkatun kasa?

Amsa: hydroxypropyl methyl cellulose (HPMC) main albarkatun kasa: mai ladabi auduga, chloromethane, propylene oxide, sauran albarkatun kasa, kwamfutar hannu alkali, acid, toluene, isopropyl barasa da sauransu.

HPMC a cikin suturar Skim a cikin aikace-aikacen, babban rawar, ko sinadarai?

Amsa: HPMC a cikin suturar Skim, kauri, ruwa da gina ayyuka uku. Kauri: cellulose na iya yin kauri zuwa dakatarwa, ta yadda maganin ya kasance iri ɗaya sama da ƙasa rawar hana kwararar rataye. Riƙewar ruwa: sanya suturar Skim ta bushe a hankali, ƙarar calcium mai launin toka a cikin aikin amsawar ruwa. Gina: lubrication cellulose, na iya sa gashin Skim yana da kyakkyawan gini. HPMC baya shiga cikin kowane halayen sinadarai, amma yana taka rawa ne kawai. Skim gashi da ruwa, a jikin bango, shine halayen sinadarai, saboda ƙirƙirar sabbin abubuwa, bangon suturar Skim ya sauko daga bango, a niƙa shi da foda, sannan a yi amfani da shi, ba kyau ba, saboda ya sami sabon abu. (calcium carbonate). Babban abubuwan da ke cikin foda mai launin toka sune: Ca (OH) 2, CaO da ƙaramin adadin CaCO3 cakuda, CaO + H2O = Ca (OH) 2 - Ca (OH) 2 + CO2 = CaCO3↓ + H2O launin toka a cikin ruwa da iska a karkashin aikin CO2, samuwar alli carbonate, da kuma HPMC kawai ruwa, karin launin toka alli mafi alhẽri dauki, da kansa bai shiga wani dauki.

HPMC ba ionic cellulose ether ba ne, don haka menene ba ionic ba?

A: Gabaɗaya magana, waɗanda ba ions abubuwa ne waɗanda ba sa ionize cikin ruwa. Ionization shine rarrabuwar electrolyte zuwa ions masu caji kyauta a cikin wani ƙayyadadden ƙarfi, kamar ruwa ko barasa. Alal misali, gishirin da muke ci kowace rana - sodium chloride (NaCl) narke cikin ruwa da ionizes don samar da sodium ions (Na +) mai motsi kyauta tare da caji mai kyau da ions chloride (Cl) tare da caji mara kyau. Wato, HPMC a cikin ruwa baya rabuwa cikin ions masu caji, amma yana wanzuwa azaman kwayoyin halitta.

Menene zafin gelation na hydroxypropyl methyl cellulose mai alaƙa da?

Amsa: Gel zafin jiki na HPMC yana da alaƙa da abun ciki na methoxyl. Ƙananan abun ciki na methoxyl shine, mafi girma yawan zafin jiki na gel shine.

Skim gashi foda da HPMC babu dangantaka?

Amsa: Skim coat drop foda yafi kuma ingancin ash ash yana da dangantaka mai girma sosai, kuma HPMC ba ta da babbar alaƙa. Ƙananan abun ciki na calcium na calcium mai launin toka da rashin daidaituwa na CaO da Ca (OH) 2 a cikin calcium mai launin toka zai haifar da faduwa foda. Idan akwai dangantaka da HPMC, to, rashin kula da ruwa na HPMC zai haifar da asarar foda.

Menene bambanci tsakanin ruwan sanyi mai narkewa da zafi mai narkewa hydroxypropyl methyl cellulose a cikin tsarin samarwa?

– Amsa: HPMC ruwan sanyi nan take bayani irin ne bayan glioxal surface jiyya, sa a cikin ruwan sanyi da sauri tarwatsa, amma ba da gaske narkar da, danko sama, an narkar da. Ba a yi amfani da nau'in thermosoluble saman da glioxal ba. Adadin glioxal yana da girma, tarwatsawa yana da sauri, amma danko yana jinkirin, adadin yana da ƙananan, akasin haka.

Menene game da hydroxypropyl methyl cellulose (HPMC) mai wari?

– Amsa: HPMC da aka samar ta hanyar ƙarfi an yi shi da toluene da barasa isopropyl. Idan wankewar ba ta da kyau sosai, za a sami ɗanɗano kaɗan.

Amfani daban-daban, yadda za a zabi hydroxypropyl methyl cellulose (HPMC) da ya dace?

- amsa: zama gundura tare da aikace-aikacen foda na yara: abin da ake bukata yana da ƙasa, danko 100000, ok, yana da mahimmanci don kare ruwa don kusanci. Aikace-aikacen turmi: buƙatu mafi girma, buƙatun danko, 150000 don zama mafi kyau. Aikace-aikacen manna: buƙatar samfuran nan take, babban danko.

Menene wani suna ga hydroxypropyl methyl cellulose?

– AMSA: Hydroxypropyl MethylCellulose, Gajarta a matsayin HPMC ko MHPC, ko Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl cellulose ether.

HPMC a cikin aikace-aikacen suturar Skim, menene dalilin Skim gashin kumfa?

Amsa: HPMC a cikin suturar Skim, kauri, ruwa da gina ayyuka uku. Rashin shiga cikin kowane martani. Dalilan kumfa: 1, yawan ruwa. 2, kasa bai bushe ba, a saman saman da ake gogewa, kuma yana da sauƙin blister.

Tsarin suturar suturar bangon ciki da na waje?

– amsa: ciki bango Skim gashi : calcium 800KG launin toka alli 150KG (sitaci ether, tsarki kore, peng runtu, citric acid, polyacrylamide za a iya ƙara daidai)

bangon waje Skim gashi: siminti 350KG calcium 500KG ma'adini yashi 150KG latex foda 8-12kg cellulose ether 3KG sitaci ether 0.5kg itace fiber 2KG

Menene bambanci tsakanin HPMC da MC?

Amsa: MC shine methyl cellulose, wanda aka yi da cellulose ether ta hanyar jerin halayen tare da methane chloride a matsayin wakili na etherifying bayan an yi amfani da auduga mai ladabi tare da alkali. Gabaɗaya, matakin maye gurbin shine 1.6 ~ 2.0, kuma solubility ya bambanta da matakin maye gurbin. Ya kasance na nonionic cellulose ether.

(1) Riƙewar ruwa na methyl cellulose ya dogara da adadin adadinsa, danko, fineness barbashi da rushewar kudi. Gabaɗaya ƙara babban adadin, ƙarami fineness, danko, yawan riƙe ruwa yana da girma. Daga cikin su, adadin ƙari yana da tasiri mafi girma a kan riƙewar ruwa, kuma danko bai dace da riƙewar ruwa ba. A rushe kudi yafi dogara a kan surface gyara digiri da barbashi fineness na cellulose barbashi. A cikin abubuwan da ke sama da yawa ethers cellulose, methyl cellulose da hydroxypropyl methyl cellulose yawan riƙe ruwa ya fi girma.

(2) Methyl cellulose yana narkewa a cikin ruwan sanyi, wanda ke da wuyar narkewa a cikin ruwan zafi. Maganin ruwan sa yana da ƙarfi sosai a cikin pH = 3 ~ 12. Yana da kyau dacewa da sitaci, guanidine danko da yawa surfactants. Gelation yana faruwa lokacin da yawan zafin jiki ya kai gelation.

(3) Canjin zafin jiki zai yi tasiri sosai akan adadin riƙe ruwa na methyl cellulose. Gabaɗaya, mafi girman zafin jiki, mafi munin riƙewar ruwa. Idan yawan zafin jiki na turmi ya wuce 40 ℃, riƙewar ruwa na methyl cellulose zai zama mafi muni, wanda ke tasiri sosai ga constructability na turmi.

(4) Methyl cellulose yana da tasiri a bayyane akan constructability da adhesion na turmi. "Adhesion" a nan yana nufin mannewa da ma'aikaci ya ji tsakanin kayan aiki da bangon bango, wato juriya na juriya na turmi. Adhesion yana da girma, juriyar juriya na turmi yana da girma, ƙarfin da ma'aikata ke bukata wajen amfani da shi kuma yana da girma, kuma ginin turmi ba shi da kyau. A cikin samfuran ether cellulose, mannewar methyl cellulose yana a matsakaicin matakin.

HPMC hydroxypropyl methyl cellulose, an mai ladabi da auduga bayan alkali magani, tare da propylene oxide da chloromethane a matsayin etherifying wakili, ta hanyar jerin halayen da Ya sanya daga wadanda ba ionic cellulose gauraye ether. Matsakaicin maye gaba ɗaya shine 1.2 ~ 2.0. Kaddarorinsa sun bambanta da rabon methoxy da abun ciki na hydroxypropyl.

(1) Hydroxypropyl methyl cellulose yana da sauƙin narkewa a cikin ruwan sanyi, wanda ke da wuyar narkewa a cikin ruwan zafi. Duk da haka, zafinsa na gelation a cikin ruwan zafi a fili ya fi na methyl cellulose girma. Solubility na methyl cellulose a cikin ruwan sanyi kuma an inganta sosai.

(2) Dankin hydroxypropyl methyl cellulose yana da alaƙa da nauyin kwayoyin halitta, kuma mafi girman nauyin kwayoyin halitta, mafi girman danko. Hakanan yanayin zafi yana shafar danko. Danko yana raguwa yayin da zafin jiki ya karu. Amma tasirinsa na danko yana da ƙasa da na methyl cellulose. Maganin yana da ƙarfi lokacin da aka adana shi a cikin zafin jiki.

(3) Hydroxypropyl methyl cellulose ya tsaya tsayin daka ga acid da tushe, kuma maganin sa na ruwa yana da ƙarfi sosai a cikin kewayon pH = 2 ~ 12. Caustic soda da ruwan lemun tsami suna da ɗan tasiri akan kaddarorin sa, amma alkali na iya haɓaka ƙimar narkarwar sa kuma inganta danko. Hydroxypropyl methyl cellulose yana da kwanciyar hankali ga gishiri na gabaɗaya, amma lokacin da maida hankali na maganin gishiri ya yi girma, dankon hydroxypropyl methyl cellulose bayani yana ƙara ƙaruwa.

(4) Riƙewar ruwa na hydroxypropyl methyl cellulose ya dogara da adadinsa da ɗankowar sa, kuma yawan riƙewar ruwa na hydroxypropyl methyl cellulose ya fi na methyl cellulose girma a daidai sashi.

(5) Hydroxypropyl methyl cellulose za a iya gauraye da ruwa-mai narkewa polymer mahadi ya zama uniform, mafi girma danko bayani. Kamar polyvinyl barasa, sitaci ether, kayan lambu manne da sauransu.

(6) Mannewar hydroxypropyl methyl cellulose zuwa ginin turmi ya fi na methyl cellulose girma.

(7) Hydroxypropyl methyl cellulose yana da mafi kyawun juriya na enzyme fiye da methyl cellulose, kuma yuwuwar lalatawar enzyme ɗinta yana ƙasa da na methyl cellulose.

Menene ya kamata a ba da hankali ga aikace-aikacen aikace-aikacen game da alaƙar danko da zafin jiki na HPMC?

Amsa: Dankowar HPMC ya bambanta da yanayin zafi, wato, danko yana ƙaruwa tare da raguwar zafin jiki. Lokacin da muke magana game da danko na samfur, muna magana ne game da danko na 2% na samfurin a cikin ruwa a digiri 20 na ma'aunin celcius.

A cikin aikace-aikacen aikace-aikacen, a cikin yankunan da ke da manyan bambance-bambancen zafin jiki tsakanin rani da hunturu, ya kamata a lura cewa an bada shawarar yin amfani da ƙananan danko a cikin hunturu, wanda ya fi dacewa don ginawa. In ba haka ba, lokacin da zafin jiki ya yi ƙasa, danko na cellulose zai karu, kuma lokacin da zazzagewa, jin zai yi nauyi.

Matsakaici danko: 75000-100000 galibi ana amfani dashi don putty

Dalili: Kyakkyawan riƙe ruwa

Babban danko: HPMC 150000-200000 ana amfani dashi galibi don polystyrene barbashi rufi turmi manne foda abu da vitrified beads rufi turmi.

Dalili: high danko, turmi ba sauki sauke, kwarara rataye, inganta yi.

Amma gabaɗaya magana, mafi girman danko, mafi kyawun riƙewar ruwa, masana'antun bushes da yawa, la'akari da farashin, suna amfani da matsakaicin danko HPMC cellulose (75000-100000) don maye gurbin matsakaici da ƙananan danko HPMC cellulose (20000-40000) don ragewa. adadin kari.