Hydroxypropyl methylcelluloseNgati ufa wa putty ndi wokhuthala wa 100,000, nthawi zambiri umakhala wokwanira, pomwe matope amafunika kukhuthala kwambiri, kotero kuti kukhuthala kwa 150,000 kuyenera kusankhidwa kuti kugwiritsidwe ntchito bwino. Ntchito yofunika kwambiri yahydroxypropyl methylcellulosendi kusunga madzi, kutsatiridwa ndi kukhuthala. Chifukwa chake, mu ufa wa putty, bola ngati kusunga madzi kukuchitika, kukhuthala kochepa nakonso n'kovomerezeka. Kawirikawiri, kukhuthala kukakhala kwakukulu, kusunga madzi kumakhala bwino, koma kukhuthala kukakhala kopitirira 100,000, zotsatira za kukhuthala pa kusunga madzi sizofunika kwenikweni.
Hydroxypropyl methylcelluloseKawirikawiri amagawidwa m'magulu otsatirawa malinga ndi kukhuthala:
1. Kukhuthala kochepa: cellulose ya kukhuthala 400, yomwe imagwiritsidwa ntchito makamaka pokonza matope okha.
Kukhuthala kochepa, kusinthasintha kwabwino kwa madzi, mukangowonjezera madziwo, madziwo sakutuluka bwino, kuchepa kwake kumakhala kochepa, ming'alu imachepa, ndipo imathanso kukana kusefukira kwa madzi, kuwonjezera kusinthasintha kwa madzi ndi kupopa madzi.
2. Kukhuthala kwapakati: cellulose yokhuthala 20,000-50,000, yomwe imagwiritsidwa ntchito makamaka popanga zinthu za gypsum ndi zinthu zotsekera.
Kukhuthala kochepa, kusunga madzi, magwiridwe antchito abwino omangira, kuwonjezera madzi pang'ono.
3. Kukhuthala kwapakati: cellulose yokhuthala 75,000-100,000, yomwe imagwiritsidwa ntchito makamaka pa putty yamkati ndi kunja kwa khoma.
Kukhuthala pang'ono, kusunga madzi bwino, kapangidwe kabwino komanso mphamvu zopachika
4. Kukhuthala kwakukulu: 150,000-200,000, makamaka imagwiritsidwa ntchito popanga matope oteteza tinthu ta polystyrene ndi matope oteteza tinthu tating'onoting'ono ta vitrified. Kukhuthala kwakukulu, kusunga madzi ambiri, matopewo ndi ovuta kuwagwetsa, kuyenda bwino, komanso kukonza kapangidwe kake.
Kawirikawiri, kukhuthala kwa madzi kukakhala kwakukulu, kumakhala bwino kusunga madzi. Chifukwa chake, makasitomala ambiri amasankha kugwiritsa ntchito cellulose yapakatikati (75,000-100,000) m'malo mwa cellulose yapakatikati (20,000-50,000) kuti achepetse kuchuluka kwa madzi omwe amawonjezeredwa ndikuchepetsa ndalama zomwe zimawonongeka.
Hydroxypropyl methylcellulose (HPMC)ndi polima yopangidwa pang'ono yomwe imagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo zomangamanga, mankhwala, ndi kupanga chakudya. Kukhuthala kwa HPMC ndi chinthu chofunikira chomwe chimatsimikizira magwiridwe antchito ake m'magwiritsidwe osiyanasiyana.
Kukhuthala kwa HPMC kumakhudzidwa ndi zinthu monga kuchuluka kwa kusintha (DS), kulemera kwa mamolekyulu, ndi kuchuluka kwa yankho la HPMC. Kawirikawiri, pamene kuchuluka kwa kusintha ndi kulemera kwa mamolekyulu kwa HPMC kukuwonjezeka, kukhuthala kwake kumawonjezekanso.
HPMC imapezeka m'mitundu yosiyanasiyana ya ma viscosity grades, nthawi zambiri imayesedwa malinga ndi "kulemera kwake kwa mamolekyulu" kapena "kuchuluka kwa methoxyl." Kukhuthala kwa HPMC kungasinthidwe mwa kusankha ma giredi oyenera kapena mwa kusintha kuchuluka kwa yankho la HPMC.
Mu ntchito zomanga, HPMC yokhala ndi kukhuthala kwakukulu nthawi zambiri imagwiritsidwa ntchito kuti igwire bwino ntchito komanso kuti zinthu zopangidwa ndi simenti zisamakhale ndi madzi ambiri. Mu mankhwala, kukhuthala ndi chinthu chofunikira kwambiri powongolera kuchuluka kwa zosakaniza zogwira ntchito zomwe zimagwiritsidwa ntchito mu mankhwala.
Chifukwa chake, kumvetsetsa kukhuthala kwa hydroxypropyl methylcellulose ndikofunikira kwambiri posankha mtundu woyenera wa ntchito zinazake ndikutsimikizira magwiridwe antchito omwe mukufuna.
Nthawi yotumizira: Meyi-30-2024