Hydroxypropyl Methylcellulose HPMC chidziwitso wamba

1. Kodi cholinga chachikulu cha HPMC ndi chiyani?

Izi zimagwiritsidwa ntchito ngati thickener, dispersant, binder, excipient, mafuta osamva zokutira, filler, emulsifier ndi stabilizer mumakampani opanga nsalu.Amagwiritsidwanso ntchito kwambiri m'mafakitale opangira utomoni, petrochemical, ceramic, mapepala, zikopa, mankhwala, chakudya ndi zodzoladzola.

2. Kodi ntchito ya HPMC mkati mwa khoma la putty powder ndi yotani?

HPMC ali ndi ntchito zitatu: putty ufa kwa khoma lamkati, thickening, madzi kutseka ndi kumanga.Kuyikirapo: Methyl cellulose imatha kukhazikika ndi njira yoyandama kapena yamadzimadzi kuti ikhale yogwira ntchito yofananira komanso yosasinthika ndikuletsa kuyenda ndikulendewera.Madzi otsekera: Ufa wamkati wamkati umauma pang'onopang'ono, ndipo kashiamu wa laimu wowonjezeredwa amawonekera pakugwiritsa ntchito madzi.Kumanga kwaumisiri: Methyl cellulose imakhala ndi ntchito yonyowetsa, yomwe ingapangitse kuti khoma lamkati la putty likhale ndi dongosolo labwino la umisiri.HPMC satenga nawo gawo pakusintha kwamankhwala onse, koma imangotenga nawo gawo pakubwezeretsanso.Inner wall putty powder, pakhoma, ndi kusintha kwa mankhwala, chifukwa pali kutembenuka kwatsopano kwa mankhwala, khoma lamkati la putty ufa limachotsedwa pakhoma, kupukuta, ndi kugwiritsidwanso ntchito , Chifukwa mankhwala atsopano (calcium bicarbonate) apangidwa. .Zigawo zazikulu za ufa wa calcium imvi ndi: osakaniza Ca(OH)2, CaO ndi CaCO3 pang'ono, CaO+H2O=Ca(OH)2 —Ca(OH)2+CO2=CaCO3↓+H2O gray calcium m'madzi ndi mpweya Pansi pa zochita za CO2, calcium carbonate imapangidwa, pamene HPMC imangosunga madzi ndikuthandizira kuyankhidwa bwino kwa imvi ya calcium, ndipo siichita nawo chilichonse.

3. Kodi kuweruza khalidwe la HPMC mophweka ndi mwachilengedwe?

(1) Kuyera: Ngakhale kuyera sikungadziwe ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati chowunikira chikuwonjezeredwa pakupanga, chidzakhudza ubwino wake.Komabe, zinthu zabwino zimakhala ndi zoyera zabwino.(2) Fineness: Ubwino wa HPMC nthawi zambiri amakhala mauna 80 ndi mauna 100, mauna 120 amakhala ochepa, ndipo ma HPMC ambiri opangidwa ku Hebei ndi ma mesh 80.Kukongoletsedwa bwino, kumakhala bwinokonso.(3) Transmittance: Ikani hydroxypropyl methylcellulose (HPMC) m'madzi kuti mupange colloid yowonekera, ndikuwona momwe imafalikira.Kuchuluka kwa transmittance, kumakhala bwino, kusonyeza kuti mkati mwake muli ma insolubles ochepa..The permeability wa ofukula riyakitala zambiri zabwino, ndi yopingasa riyakitala ndi zoipa, koma sizikutanthauza kuti khalidwe la ofukula riyakitala ndi bwino kuposa ya yopingasa riyakitala.Ubwino wa mankhwalawa umatsimikiziridwa ndi zinthu zambiri.(4) Kuchulukana: Kuchuluka kwa gawoli, kulemera kumakhala bwinoko.Kukhazikika kwapamwamba kumachitika chifukwa cha kuchuluka kwa hydroxypropyl momwemo, ndipo kuchuluka kwa hydroxypropyl kumapangitsa kuti madzi asungidwe bwino.

4. Kodi tiyenera kulabadira chiyani mukamagwiritsa ntchito mamasukidwe akayendedwe ndi kutentha kwa HPMC?

The mamasukidwe akayendedwe a HPMC ndi inversely proportional kutentha, ndiko kuti, mamasukidwe akayendedwe ukuwonjezeka pamene kutentha amachepetsa.Nthawi zambiri timanena kuti kukhuthala kwa chinthu kumatanthawuza zotsatira za kuyesa njira yake yamadzi 2% pa kutentha kwa madigiri 20 Celsius.Muzochita zothandiza, m'madera omwe ali ndi kusiyana kwakukulu kwa kutentha pakati pa chilimwe ndi nyengo yozizira, ziyenera kukumbukiridwa kuti tikulimbikitsidwa kugwiritsa ntchito kukhuthala kochepa kwambiri m'nyengo yozizira, yomwe imakhala yabwino kwambiri pomanga.Kupanda kutero, kutentha kukakhala kotsika, kukhuthala kwa cellulose kumawonjezeka, ndipo dzanja limakhala lolemera likamadulidwa.

5. Kodi njira zowonongera za HPMC ndi ziti?

Njira yosungunula madzi otentha: Popeza HPMC simasungunuka m'madzi otentha, HPMC imatha kumwazikana m'madzi otentha pagawo loyambirira, kenako ndikusungunuka ikakhazikika.Njira ziwiri zodziwika bwino zikufotokozedwa motere: 1).Kuchuluka kwa madzi otentha ndikutenthetsa pafupifupi 70 ° C.Pang'onopang'ono onjezani hydroxypropyl methylcellulose ndikuyambitsa pang'onopang'ono, yambani HPMC kuyandama pamwamba pa madzi, kenako pang'onopang'ono pangani slurry, ndikuziziritsa slurry ndikugwedeza.2).Onjezerani 1/3 kapena 2/3 ya madzi ofunikira mumtsuko ndikutenthetsa mpaka 70 ° C.Malinga ndi njira 1), kumwazikana HPMC kukonzekera madzi otentha slurry;kenaka yonjezerani madzi otsala otsala kumadzi otentha Mu slurry, ozizira kusakaniza mutatha kuyambitsa.Ufa kusakaniza njira: kusakaniza HPMC ufa ndi kuchuluka kwa zinthu zina ufa, kusakaniza bwino ndi blender, ndiyeno kuwonjezera madzi kupasuka, ndiye HPMC akhoza kusungunuka pa nthawi ino popanda clumping ndi agglomerating, chifukwa aliyense ngodya kakang'ono, pali kokha. pang'ono HPMC ufa udzasungunuka mwamsanga ukakumana ndi madzi.-Opanga matope ndi matope amagwiritsa ntchito njirayi.[Hydroxypropyl methyl cellulose (HPMC) amagwiritsidwa ntchito ngati thickener ndi kusunga madzi mu putty powder mortar.]

6. Ndi chiyanimlingoya HPMC yowonjezeredwa mu putty powder?

Kuchuluka kwa HPMC komwe kumagwiritsidwa ntchito pazochitika zenizeni kumasiyanasiyana malinga ndi nyengo, kutentha, khalidwe la phulusa la calcium, mawonekedwe a putty powder, ndi "khalidwe lofunika kwa makasitomala".Nthawi zambiri, ndi pakati pa 4 kg ndi 5 kg.Mwachitsanzo, ufa wa putty mu zokongoletsera'> Beijing nthawi zambiri imakhala 5 kg;ufa wa putty ku Guizhou nthawi zambiri umakhala 5 kg m'chilimwe ndi 4.5 kg m'nyengo yozizira;Zowonjezera za Yunnan ndizochepa, nthawi zambiri 3 kg-4 kg ndi zina zotero.