Zida za cellulose zimachokera ku zamkati za thonje lachilengedwe kapena zamkati zamatabwa ndi etherification. Mitundu yosiyanasiyana ya cellulose imagwiritsa ntchito ma etherifying osiyanasiyana. Hypromellose HPMC imagwiritsa ntchito mitundu ina ya etherifying agents (chloroform ndi 1,2-epoxypropane) , pamene hydroxyethyl cellulose HEC imagwiritsa ntchito Oxirane etherifying agents. Ma cellulose a Hydroxyethyl atha kugwiritsidwa ntchito ngati thickener mu utoto weniweni wamwala ndi utoto wa latex. Chifukwa cha kuchuluka kwake, mphamvu yokoka yeniyeni, mpweya, imayenera kuwonjezera kukhuthala kuti ionjezere kukhuthala kwake, kuti ikwaniritse zofunikira za kutsitsi kukhuthala, ndikuwongolera kukhazikika kwake kosungirako, ndikukwaniritsa mphamvu zina. Kuti mukhale ndi mphamvu zabwino, kukana madzi abwino ndi kukana kwa nyengo, kusankha kwa zipangizo ndi mapangidwe apangidwe ndizofunikira kwambiri.
Kawirikawiri, kuchuluka kwa emulsion yamtengo wapatali weniweni wa utoto kudzakhala wapamwamba. Mwachitsanzo, tani ya utoto weniweni wamwala ukhoza kukhala ndi 300 kg ya emulsion yoyera ya acrylic ndi 650 kg yamchenga yamwala yachikuda. Pamene olimba zili emulsion ndi 50% , voliyumu ya 300 makilogalamu emulsion pambuyo kuyanika pafupifupi 150 malita, 650 Kg mchenga pafupifupi 228 malita. Izi zikutanthauza kuti, panthawiyi PVC (pigment volume concentration) ya utoto weniweni wamwala ndi 60% , chifukwa tinthu tating'onoting'ono ta mchenga ndi zazikulu komanso zosaoneka bwino, pansi pa chikhalidwe cha kugawa kwa tinthu, pambuyo poyanika. utoto weniweni wamwala ukhoza kukhala mu CPVC (critical pigment volume concentration) pafupifupi. Kwa thickener, ngati mamasukidwe oyenera a cellulose asankhidwa, filimu yokwanira komanso yowundana imatha kupangidwa kuti ikwaniritse zofunikira zazikulu zitatu za utoto weniweni wa miyala. Ngati zomwe zili mu emulsion ndizochepa, tikulimbikitsidwa kugwiritsa ntchito kukhuthala kwapamwamba kwa cellulose monga thickener (mwachitsanzo 100,000 viscosity) , makamaka pambuyo pa kuwonjezeka kwa mtengo wa cellulose, zomwe zingachepetse kuchuluka kwa cellulose zomwe zimagwiritsidwa ntchito, komanso zimatha kulola ntchitoyo. wa utoto weniweni wamwala wapamwamba kwambiri. Ena opanga utoto weniweni wamwala wotchipa achotsa hydroxyethyl cellulose ndi hypromellose chifukwa cha mtengo ndi zina. Poyerekeza ndi mitundu iwiri ya cellulose, hydroxyethyl cellulose imakhala ndi mphamvu yosunga madzi bwino, sitaya mphamvu yosunga madzi chifukwa cha gel osakaniza kutentha kwambiri, ndipo imakhala ndi kukana kwa mildew. Pofuna kugwira ntchito, tikulimbikitsidwa kugwiritsa ntchito 100,000 viscosity hydroxyethyl cellulose ngati thickener wa penti weniweni wamwala.
Nthawi yotumiza: Jul-24-2023