HPMC mu Skim coat

Hydroxypropyl methyl cellulose (HPMC) viscosity ya Skim coat?

- Yankho: Chovala cha skim ndichabwino nthawi zambiri HPMC 100000cps, china chachitali chomwe chimafunikira mumatope, chimafuna 150000cps kugwiritsa ntchito. Komanso, HPMC ndi gawo lofunika kwambiri la kusunga madzi, kutsatiridwa ndi thickening. Mu Skim coat , bola ngati kusungirako madzi kuli bwino, kukhuthala kumakhala kochepa (7-80000), n'zothekanso, ndithudi, kukhuthala ndi kwakukulu, kusungirako madzi kwachibale kuli bwino, pamene mamasukidwe akayendedwe ndi oposa 100. zikwi, mamasukidwe akayendedwe a madzi posungira si zambiri.

Kodi zizindikiro zazikulu za hydroxypropyl methyl cellulose (HPMC) ndi ziti?

Yankho: Zomwe zili ndi Hydroxypropyl ndi viscosity, ogwiritsa ntchito ambiri amasamala za zizindikiro ziwirizi. Zomwe zili mu Hydroxypropyl ndizokwera, kusunga madzi nthawi zambiri kumakhala bwinoko. Kukhuthala, kusunga madzi, wachibale (koma osati mtheradi) ndi bwino, ndi mamasukidwe akayendedwe, simenti matope ndi bwino ntchito ena.

Hydroxypropyl methyl cellulose (HPMC) ndi zida ziti zazikulu zopangira?

Yankho: hydroxypropyl methyl cellulose (HPMC) zopangira zazikulu: thonje woyengedwa, chloromethane, propylene oxide, zopangira zina, piritsi zamchere, asidi, toluene, mowa wa isopropyl ndi zina zotero.

HPMC mu Skim coat mu ntchito, udindo waukulu, kaya mankhwala?

Yankho: HPMC mu Skim coat, thickening, madzi ndi kumanga maudindo atatu. Makulidwe: mapadi amatha kukulitsidwa kuti ayimitsidwe, kotero kuti yankho limakhalabe yunifolomu mmwamba ndi pansi udindo wa anti-otaya yopachikidwa. Kusunga madzi: pangitsa kuti Skim coat iume pang'onopang'ono, kashiamu wotuwa wothandiza pakuchita kwamadzi. Zomangamanga: mafuta a cellulose, amatha kupanga malaya a Skim kukhala ndi zomangamanga zabwino. HPMC sitenga nawo gawo pazosintha zilizonse zamakina, koma imangothandiza. Skim odula ndi madzi, pa khoma, ndi anachita mankhwala, chifukwa cha m'badwo wa zinthu zatsopano, khoma la Skim malaya pansi pa khoma, pansi kukhala ufa, ndiyeno ntchito, osati zabwino, chifukwa wapanga chinthu chatsopano. (calcium carbonate). Zigawo zazikulu za ufa wa calcium imvi ndi: Ca(OH)2, CaO ndi kagawo kakang'ono ka CaCO3, CaO+H2O=Ca(OH)2 - Ca(OH)2+CO2=CaCO3↓+H2O imvi calcium m'madzi. ndi mpweya pansi zochita za CO2, mapangidwe kashiamu carbonate, ndi HPMC madzi okha, wothandiza imvi kashiamu bwino anachita, ake sanachite nawo chilichonse anachita.

HPMC ndi non-ionic cellulose ether, ndiye non-ionic ndi chiyani?

Yankho: Nthawi zambiri, ma non-ion ndi zinthu zomwe sizimayanika m'madzi. Ionization ndi kupasuka kwa ma electrolyte kukhala ma ion oyendetsedwa aulere muzosungunulira zina, monga madzi kapena mowa. Mwachitsanzo, mchere umene timadya tsiku lililonse - sodium kolorayidi (NaCl) umasungunuka m'madzi ndi ionizes kuti apange ayoni a sodium (Na +) omwe ali ndi ndalama zabwino komanso chloride ions (Cl) ndi ndalama zoipa. Ndiko kuti, HPMC m'madzi simagawanitsa mu ma ion opangidwa, koma imakhala ngati mamolekyu.

Kodi kutentha kwa gelation kwa hydroxypropyl methyl cellulose kumagwirizana ndi chiyani?

Yankho: Kutentha kwa gel osakaniza a HPMC kumagwirizana ndi zomwe zili ndi methoxyl. Kutsika kwa methoxyl kumakhala, kutentha kwa gel kumakwera.

Skim coat powder ndi HPMC palibe ubale?

Yankho: Skim coat drop drop powder makamaka ndi phulusa la calcium khalidwe liri ndi ubale waukulu kwambiri, ndipo HPMC ilibe ubale waukulu kwambiri. Kashiamu wochepa wa calcium yotuwira komanso kuchuluka kosayenera kwa CaO ndi Ca(OH)2 mu kashiamu wotuwira kumapangitsa kuti ufa ugwe. Ngati pali ubale ndi HPMC, ndiye kuti kusungidwa kwa madzi kosauka kwa HPMC kudzachititsanso kutaya ufa.

Kodi pali kusiyana kotani pakati pa madzi ozizira osungunuka ndi otentha sungunuka hydroxypropyl methyl cellulose popanga?

– Yankho : HPMC madzi ozizira yomweyo njira yothetsera mtundu pambuyo glyoxal pamwamba mankhwala, kuika m'madzi ozizira omwazika mwamsanga, koma osati kwenikweni kusungunuka, mamasukidwe akayendedwe mmwamba, ndi kusungunuka. Mtundu wa thermosoluble sunapangidwe pamwamba ndi glyoxal. Kuchuluka kwa glyoxal ndi kwakukulu, kubalalitsidwa kumathamanga, koma mamasukidwe ake amachedwa, kuchuluka kwake ndi kochepa, m'malo mwake.

Kodi hydroxypropyl methyl cellulose (HPMC) yomwe imanunkhira ndi chiyani?

- Yankho: HPMC yopangidwa ndi njira yosungunulira imapangidwa ndi toluene ndi mowa wa isopropyl. Ngati kutsuka sikuli bwino, padzakhala kukoma kotsalira.

Zogwiritsa ntchito zosiyanasiyana, momwe mungasankhire hydroxypropyl methyl cellulose (HPMC) yoyenera?

- Yankho: khalani otopa ndi kugwiritsa ntchito ufa wa mwana: chofunikira ndi chochepa, kukhuthala 100000, chabwino, ndikofunikira kuteteza madzi kuti akhale pafupi. Kugwiritsa ntchito matope: zofunikira zapamwamba, zofunikira za viscosity, 150000 kuti zikhale bwino. Glue ntchito: kufunikira kwa zinthu pompopompo, kukhuthala kwakukulu.

Dzina lina la hydroxypropyl methyl cellulose ndi liti?

- YANKHO: Hydroxypropyl MethylCellulose, Chidule cha HPMC kapena MHPC, kapena Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.

HPMC pakugwiritsa ntchito Skim coat, chifukwa chiyani Skim coat kuwira?

Yankho: HPMC mu Skim coat, thickening, madzi ndi kumanga maudindo atatu. Osatenga nawo mbali pazochita zilizonse. Zomwe zimayambitsa thovu: 1, madzi ochulukirapo. 2, pansi siwouma, pamwamba pa scraping wosanjikiza, komanso yosavuta matuza.

Khoma lamkati ndi lakunja la Skim coat formula?

– Yankho: mkati khoma Skim odula : kashiamu 800KG imvi kashiamu 150KG (wowuma etere, koyera wobiriwira, peng runtu, citric asidi, polyacrylamide akhoza kuwonjezeredwa moyenera)

Kunja khoma Skim odula : simenti 350KG calcium 500KG quartz mchenga 150KG latex ufa 8-12kg mapadi etere 3KG wowuma etha 0.5kg nkhuni CHIKWANGWANI 2KG

Kodi pali kusiyana kotani pakati pa HPMC ndi MC?

- Yankho :MC ndi methyl cellulose, yomwe imapangidwa ndi cellulose ether kudzera muzochita zingapo ndi methane chloride ngati etherifying agent pambuyo poti thonje loyengedwa limapangidwa ndi alkali. Nthawi zambiri, kuchuluka kwa m'malo ndi 1.6 ~ 2.0, ndipo kusungunuka kwake kumasiyana ndi kuchuluka kwa kulowetsa. Ndi ya nonionic cellulose ether.

(1) Kusungidwa kwa madzi kwa methyl cellulose kumadalira kuchuluka kwake, kukhuthala, kukongola kwa tinthu ndi kuchuluka kwa kusungunuka. Nthawi zambiri kuwonjezera kuchuluka, fineness yaing'ono, mamasukidwe akayendedwe, madzi posungira mlingo ndi mkulu. Pakati pawo, kuchuluka kwa zowonjezera kumakhudza kwambiri kusungirako madzi, ndipo mamasukidwe akayendedwe sali ofanana ndi kusungirako madzi. The Kusungunuka mlingo makamaka zimadalira pamwamba kusinthidwa digirii ndi tinthu fineness wa mapadi particles. M'ma cellulose ether angapo omwe ali pamwambapa, methyl cellulose ndi hydroxypropyl methyl cellulose kusungidwa kwa madzi ndipamwamba.

(2) Methyl cellulose imasungunuka m'madzi ozizira, omwe ndi ovuta kusungunuka m'madzi otentha. Njira yake yamadzimadzi imakhala yokhazikika mkati mwa pH = 3 ~ 12. Imagwirizana bwino ndi wowuma, chingamu cha guanidine ndi ma surfactants ambiri. Gelation imachitika pamene kutentha kumafika kutentha kwa gelation.

(3) Kusintha kwa kutentha kudzakhudza kwambiri kuchuluka kwa kusunga madzi kwa methyl cellulose. Nthawi zambiri, kutentha kumapangitsa kuti madzi asamasungidwe kwambiri. Ngati kutentha kwa matope kupitirira 40 ℃, kusungidwa kwa madzi kwa methyl cellulose kumakhala koyipa kwambiri, zomwe zimakhudza kwambiri kumangidwa kwa matope.

(4) Methyl cellulose ali ndi chikoka chodziwikiratu pakupanga ndi kumamatira kwa matope. "Kumamatira" apa kumatanthauza kumamatira kwa wogwira ntchito pakati pa chida ndi gawo lapansi la khoma, ndiko kukana kukameta ubweya wa matope. Kumamatira ndi kwakukulu, kukana kukameta ubweya wa matope ndi kwakukulu, mphamvu yofunikira ndi ogwira ntchito pakugwiritsa ntchito imakhalanso yaikulu, ndipo kumanga matope ndi osauka. Muzinthu za cellulose ether, kumamatira kwa methyl cellulose kumakhala pamlingo wocheperako.

HPMC hydroxypropyl methyl cellulose, imayengedwa ndi thonje pambuyo pa mankhwala a alkali, ndi propylene oxide ndi chloromethane monga etherifying agent, kudzera muzochita zingapo komanso zopangidwa ndi cellulose yosakanizidwa ndi ether. Mlingo wolowa m'malo nthawi zambiri ndi 1.2 ~ 2.0. Makhalidwe ake amasiyana malinga ndi kuchuluka kwa methoxy ndi hydroxypropyl.

(1) Hydroxypropyl methyl cellulose imasungunuka mosavuta m'madzi ozizira, omwe ndi ovuta kusungunuka m'madzi otentha. Komabe, kutentha kwake kwa gelation m'madzi otentha mwachiwonekere ndikokwera kuposa kwa methyl cellulose. Kusungunuka kwa methyl cellulose m'madzi ozizira kunasinthanso kwambiri.

(2) Kukhuthala kwa hydroxypropyl methyl cellulose kumakhudzana ndi kulemera kwake kwa maselo, ndipo kulemera kwake kwa mamolekyu kumakwera kwambiri. Kutentha kumakhudzanso mamasukidwe akayendedwe. Viscosity imachepa pamene kutentha kumawonjezeka. Koma kukhuthala kwake kutentha kwakukulu kumakhala kotsika kuposa kwa methyl cellulose. Yankho lake ndi lokhazikika likasungidwa kutentha.

(3) Hydroxypropyl methyl cellulose ndi yokhazikika ku asidi ndi maziko, ndipo njira yake yamadzimadzi imakhala yokhazikika pa pH = 2 ~ 12. Koloko ndi madzi a mandimu alibe mphamvu zochepa pa katundu wake, koma zamchere zimatha kufulumizitsa kusungunuka kwake ndikuwongolera kukhuthala. Hydroxypropyl methyl cellulose imakhala yokhazikika ku mchere wamba, koma mchere ukakhala wambiri, kukhuthala kwa hydroxypropyl methyl cellulose solution kumawonjezeka.

(4) Kusungidwa kwa madzi kwa hydroxypropyl methyl cellulose kumadalira mulingo wake komanso kukhuthala kwake, komanso kuchuluka kwa madzi a hydroxypropyl methyl cellulose ndi apamwamba kuposa a methyl cellulose pa mlingo womwewo.

(5) Hydroxypropyl methyl cellulose akhoza kusakaniza ndi madzi sungunuka polima mankhwala kukhala yunifolomu, apamwamba mamasukidwe akayendedwe njira. Monga polyvinyl mowa, wowuma ether, masamba guluu ndi zina zotero.

(6) Kumamatira kwa hydroxypropyl methyl cellulose pakupanga matope ndikokwera kuposa methyl cellulose.

(7) Hydroxypropyl methyl cellulose imakhala ndi kukana bwino kwa enzyme kuposa methyl cellulose, ndipo njira yake yowonongeka ya enzyme ndiyotsika kuposa ya methyl cellulose.

Ndi chiyani chomwe chiyenera kutsatiridwa pakugwiritsa ntchito bwino pa ubale pakati pa mamasukidwe akayendedwe ndi kutentha kwa HPMC?

Yankho: Kukhuthala kwa HPMC ndikofanana ndi kutentha, ndiko kuti, kukhuthala kumawonjezeka ndi kuchepa kwa kutentha. Tikamalankhula za kukhuthala kwa chinthu, tikukamba za kukhuthala kwa 2% ya mankhwalawa m'madzi pa madigiri 20 Celsius.

Pogwiritsira ntchito, m'madera omwe ali ndi kusiyana kwakukulu kwa kutentha pakati pa chilimwe ndi nyengo yozizira, ziyenera kukumbukiridwa kuti tikulimbikitsidwa kugwiritsa ntchito viscosity yochepa kwambiri m'nyengo yozizira, yomwe imakhala yabwino kwambiri pomanga. Apo ayi, kutentha kukakhala kochepa, kukhuthala kwa cellulose kumawonjezeka, ndipo pamene kupukuta, kumva kumakhala kolemetsa.

Kukhuthala kwapakatikati :75000-100000 makamaka amagwiritsidwa ntchito pa putty

Chifukwa: Kusunga madzi bwino

High mamasukidwe akayendedwe: HPMC 150000-200000 zimagwiritsa ntchito polystyrene tinthu kutchinjiriza matope matope zomatira ufa ndi vitrified mikanda kutchinjiriza matope.

Chifukwa: mkulu mamasukidwe akayendedwe, matope si zophweka kugwetsa, otaya akulendewera, kusintha yomanga.

Koma kawirikawiri, ndipamwamba kukhuthala kwamphamvu, ndi bwino kusunga madzi, ambiri youma matope mafakitale, kuganizira mtengo, ntchito sing'anga kukhuthala HPMC mapadi (75000-100000) m'malo sing'anga ndi otsika mamasukidwe akayendedwe kukhuthala HPMC mapadi (20000-40000) kuchepetsa kuchuluka kwa kuwonjezera.