Putty ndi chinthu chofunikira chomangira chomwe chimagwiritsidwa ntchito pokweza khoma, ndipo magwiridwe ake amakhudza mwachindunji kumamatira kwa utoto komanso kapangidwe kake. Pakupanga putty, zowonjezera za cellulose ether zimagwira ntchito yofunikira.Hydroxypropyl Methylcellulose (HPMC), monga imodzi mwama cellulose ethers omwe amagwiritsidwa ntchito kwambiri, amatha kuwongolera kukhuthala, ntchito yomanga komanso kusunga bata kwa putty.
1. Basic katundu wa Hydroxypropyl Methylcellulose
HPMC ndi si ionic madzi sungunuka polima ndi thickening wabwino, posungira madzi, kubalalitsidwa, emulsification ndi filimu kupanga katundu. Kukhuthala kwake kumakhudzidwa ndi kuchuluka kwa m'malo, digiri ya polymerization ndi kusungunuka kwa zinthu. Njira yamadzimadzi ya AnxinCel®HPMC imawonetsa mawonekedwe amadzimadzi a pseudoplastic, ndiye kuti, kumeta ubweya kumawonjezeka, kukhuthala kwa yankho kumachepa, komwe kuli kofunikira pakumanga kwa putty.
2. Zotsatira za HPMC pa putty viscosity
2.1 Kukulitsa zotsatira
HPMC ndipamene mkulu mamasukidwe akayendedwe njira pambuyo Kutha m'madzi. Kukula kwake kumawonekera makamaka pazinthu izi:
Kupititsa patsogolo thixotropy wa putty: HPMC akhoza kusunga putty pa mkulu mamasukidwe akayendedwe pamene ali osasunthika kupewa sagging, ndi kuchepetsa mamasukidwe akayendedwe pamene scraping ndi kuwongolera yomanga ntchito.
Kupititsa patsogolo kugwira ntchito kwa putty: Kuchuluka koyenera kwa HPMC kumatha kupititsa patsogolo mafuta a putty, kupangitsa kukwapula kukhala kosavuta komanso kuchepetsa kukana kumanga.
Kukhudza mphamvu yomaliza ya putty: Kukhuthala kwa HPMC kumapangitsa zodzaza ndi simenti mu putty kukhala obalalika, kupewa tsankho ndikuwongolera magwiridwe antchito pambuyo pomanga.
2.2 Zotsatira za hydration process
HPMC ili ndi zinthu zabwino kwambiri zosungira madzi, zomwe zimatha kuchepetsa kutuluka kwamadzi mwachangu mugawo la putty, potero kumatalikitsa nthawi ya hydration ya putty yochokera ku simenti ndikuwongolera mphamvu ndi kukana kwa ming'alu ya putty. Komabe, kukhuthala kwamphamvu kwambiri kwa HPMC kumakhudza kutulutsa kwa mpweya komanso kuthamanga kwa putty, zomwe zimapangitsa kuti ntchito yomanga ikhale yochepa. Choncho, kuchuluka kwa HPMC ayenera kuonetsetsa workability pamene kupewa zotsatira zoipa pa nthawi kuumitsa.
2.3 Ubale pakati pa kulemera kwa maselo a HPMC ndi kukhuthala kwa putty
Kuchuluka kwa maselo a HPMC, kumapangitsanso kukhuthala kwake kwamadzimadzi. Mu putty, kugwiritsa ntchito HPMC yokhala ndi mamasukidwe apamwamba kwambiri (monga mtundu wokhala ndi mamasukidwe owoneka bwino kuposa 100,000 mPa · s) kumatha kusintha kwambiri kusungidwa kwamadzi ndi anti-sagging katundu wa putty, koma kungayambitsenso kuchepa kwa magwiridwe antchito. Choncho, pansi pa zofunikira zosiyanasiyana zomanga, HPMC yokhala ndi kukhuthala koyenera iyenera kusankhidwa kuti iwonetsetse kusunga madzi, kugwira ntchito ndi ntchito yomaliza.
2.4 Zotsatira za mlingo wa HPMC pa putty viscosity
Kuchuluka kwa AnxinCel®HPMC yowonjezeredwa kumakhudza kwambiri kukhuthala kwa putty, ndipo mlingo nthawi zambiri umakhala pakati pa 0.1% ndi 0.5%. Mlingo wa HPMC ukakhala wotsika, kukhuthala kwa putty kumakhala kochepa, ndipo sikungathe kuwongolera bwino magwiridwe antchito ndi kusunga madzi. Mlingo ukakhala wokwera kwambiri, kukhuthala kwa putty kumakhala kokulirapo, kukana kwa zomangamanga kumawonjezeka, ndipo kumatha kukhudza kuthamanga kwa kuyanika kwa putty. Chifukwa chake, ndikofunikira kusankha kuchuluka koyenera kwa HPMC molingana ndi dongosolo la putty ndi malo omanga.
Hydroxypropyl methylcellulose imathandizira kukulitsa, kusunga madzi ndikuwongolera magwiridwe antchito mu putty. Kulemera kwa molekyulu, digiri ya kulowetsa m'malo ndi kuchuluka kwaMtengo wa HPMCzidzakhudza kukhuthala kwa putty. Kuchuluka koyenera kwa HPMC kumatha kupititsa patsogolo magwiridwe antchito ndi kukana kwamadzi kwa putty, pomwe kuwonjezera kwambiri kumatha kukulitsa zovuta zomanga. Chifukwa chake, pakugwiritsa ntchito kwenikweni kwa putty, mawonekedwe a viscosity ndi zofunikira zomanga za HPMC ziyenera kuganiziridwa mozama, ndipo chilinganizocho chiyenera kusinthidwa bwino kuti chipeze ntchito yabwino yomanga ndi mtundu womaliza.
Nthawi yotumiza: Feb-10-2025