Zomwe zimakhudza kusungidwa kwa madzi kwa hydroxypropyl methylcellulose

The apamwamba mamasukidwe akayendedwe ahydroxypropyl methylcellulose, ndi bwino kusunga madzi.Viscosity ndi gawo lofunikira la magwiridwe antchito a HPMC.Pakali pano, opanga osiyanasiyana HPMC ntchito njira zosiyanasiyana ndi zida kuyeza mamasukidwe akayendedwe a HPMC.Njira zazikulu ndi Haake Rotovisko, Hoppler, Ubbelohde ndi Brookfield.

Kwa mankhwala omwewo, zotsatira za viscosity zoyezedwa ndi njira zosiyanasiyana ndizosiyana kwambiri, ndipo zina zimakhalanso kuwirikiza kawiri.Chifukwa chake, poyerekeza mamasukidwe akayendedwe, onetsetsani kuti mukuzichita pakati pa njira zoyesera zomwezo, kuphatikiza kutentha, rotor, ndi zina.

Pa kukula kwa tinthu tating'onoting'ono, tinthu tating'onoting'ono timasunga bwino madzi.Pambuyo pa tinthu tating'ono ta cellulose ether takumana ndi madzi, pamwamba pake amasungunuka nthawi yomweyo kupanga gel osakaniza, omwe amakulunga zinthuzo kuti ateteze kulowetsedwa kosalekeza kwa mamolekyu amadzi..Zimakhudza kwambiri kusungidwa kwa madzi kwa cellulose ether yake, ndipo kusungunuka ndi chimodzi mwazinthu zomwe zimasankha cellulose ether.Fineness ndiwonso index yofunikira ya methyl cellulose ether.The MC ntchito youma ufa matope chofunika kukhala ufa, ndi otsika madzi okhutira, ndi fineness amafunanso 20% kuti 60% ya tinthu kukula kukhala zosakwana 63um.Fineness imakhudza kusungunuka kwa hydroxypropyl methylcellulose ether.Coarse MC nthawi zambiri imakhala granular, ndipo ndiyosavuta kusungunuka m'madzi popanda kuphatikizika, koma kusungunuka kumakhala pang'onopang'ono, kotero sikoyenera kugwiritsidwa ntchito mumatope owuma.Mu matope a ufa wowuma, MC imamwazikana pakati pa zida za simenti monga ma aggregates, zodzaza bwino ndi simenti.Ufa wokwanira wokwanira ungapewe kuphatikizika kwa methyl cellulose ether mukasakaniza ndi madzi.MC ikawonjezeredwa ndi madzi kuti isungunuke ma agglomerates, zimakhala zovuta kumwazikana ndikusungunula.MC yokhala ndi coarser fineness sizongowononga, komanso imachepetsa mphamvu yakumaloko yamatope.Pamene matope owuma owuma amamangidwa m'dera lalikulu, kuthamanga kwa machiritso a matope owuma a m'deralo kumachepetsedwa kwambiri, ndipo kusweka kumachitika chifukwa cha nthawi zosiyanasiyana zochiritsira.Kwa matope opopera pogwiritsa ntchito makina omanga, chifukwa cha nthawi yofupikitsa, fineness iyenera kukhala yapamwamba.

Nthawi zambiri, kukwezeka kwa mamachulukidwe kumapangitsa kuti madzi asungidwe bwino.Komabe, kukwezeka kwa mamasukidwe apamwamba komanso kulemera kwa maselo a MC, kuchepetsedwa kofananira ndi kusungunuka kwake, komwe kumakhudzanso mphamvu ndi zomangamanga za matope.Kuchuluka kwa mamasukidwe akayendedwe, m'pamenenso kuwonjezereka kwa matope kumawonekera, koma sikuli kofanana.Kukwera kwa mamachulukidwe ake, m'pamenenso matope onyowa amamatira.Pakumanga, imamatira ku scraper ndikukhala ndi zomatira kwambiri ku gawo lapansi.Koma sizimachita pang'ono kuwonjezera mphamvu zamapangidwe a dothi lonyowa lokha.Panthawi yomanga, ntchito ya anti-sagging sikuwonekera.M'malo mwake, ma ether ena ocheperako koma osinthidwa a methyl cellulose amatha kuchita bwino pakuwongolera mphamvu zamapangidwe amatope onyowa.

Kuchulukirachulukira kwa cellulose ether komwe kumawonjezeredwa mumatope, kumapangitsa kuti madzi asungidwe bwino, kukwezeka kwa mamasukidwe amphamvu, kumapangitsa kuti madzi asungidwe bwino.

Ubwino wa HPMC ulinso ndi chikoka pa kusunga madzi.Nthawi zambiri, ma etha a methyl cellulose okhala ndi kukhuthala kofanana koma fineness yosiyana, ngati awonjezera kuchuluka komweko, kuwongolera bwino, kumapangitsa kuti madzi asungidwe bwino.

Kusungidwa kwa madzi kwa HPMC kumagwirizananso ndi kutentha komwe kumagwiritsidwa ntchito, ndipo kusunga madzi kwa methyl cellulose ether kumachepa ndi kuwonjezeka kwa kutentha.Komabe, pogwiritsira ntchito zinthu zothandiza, matope owuma a ufa nthawi zambiri amagwiritsidwa ntchito kumalo otentha kwambiri (opitirira madigiri 40) m'madera ambiri, monga kunja kwa khoma la putty pulasitala pansi pa dzuwa m'chilimwe, zomwe nthawi zambiri zimathandizira Kuchiritsa simenti ndi kuumitsa kwa simenti. dothi louma.Kutsika kwa madzi osungiramo madzi kwachititsa kuti anthu azidziwikiratu kuti zonse zomwe zimagwira ntchito komanso kusokoneza ming'alu zimakhudzidwa, ndipo ndizofunikira kwambiri kuchepetsa zotsatira za kutentha pansi pazimenezi.Ngakhale kuti methyl hydroxyethyl cellulose ether additive pakali pano ikuwoneka kuti ili patsogolo pa chitukuko cha zamakono, kudalira kwake kutentha kungapangitsebe kufooka kwa ntchito yamatope owuma.Ngakhale kuchuluka kwa methyl hydroxyethyl cellulose (chilinganizo cha chilimwe) kumachulukirachulukira, kugwirira ntchito kwake komanso kukana kwa crack sikungakwaniritse zosowa zogwiritsidwa ntchito.Kupyolera mu mankhwala ena apadera, monga kuonjezera mlingo wa etherification, MC ikhoza kusunga madzi ake osungira madzi bwino pa kutentha kwakukulu, kuti athe kupereka ntchito yabwino pansi pa zovuta.