Momwe mungasankhire chothina cha hydroxyethyl cellulose cha utoto wa latex

Pogwiritsa ntchito utoto wa latex wochokera m'madzi, kusankha chokhuthala cha utoto wa latex kumasiyana. Kusintha kwa rheology ndi kuwongolera kukhuthala kwa utoto wa latex kuchokera ku kuchuluka kwa shear yapamwamba, yapakati komanso yotsika. Kusankha ndi kugwiritsa ntchito zokhuthala za utoto wa latex ndi utoto wa latex m'njira zosiyanasiyana za emulsion (pure acrylic, styrene-acrylic, ndi zina zotero).

Ntchito yaikulu ya zokhuthala mu utoto wa latex, momwe rheology ndi chimodzi mwazinthu zofunika kwambiri zomwe zimapangitsa mawonekedwe ndi magwiridwe antchito a mafilimu a utoto. Ganiziraninso momwe kukhuthala kwa utoto kumakhudzira mvula, kupukutika, kusalala, kudzaza kwa filimu ya utoto, ndi kutsika kwa filimu pamwamba pa utoto panthawi yopukutira. Izi ndi nkhani zabwino zomwe opanga nthawi zambiri amaganizira.

Kapangidwe ka utoto wa latex kamakhudza rheology ya utoto wa latex, ndipo kukhuthala kumatha kusinthidwa mwa kusintha kuchuluka kwa emulsion ndi kuchuluka kwa zinthu zina zolimba zomwe zimafalikira mu utoto wa latex. Komabe, kusintha kwake ndi kochepa ndipo mtengo wake ndi wokwera. Kukhuthala kwa utoto wa latex kumasinthidwa makamaka ndi zokhuthala. Zokhuthala zomwe zimagwiritsidwa ntchito kwambiri ndi izi: zokhuthala za cellulose ether, zokhuthala za polyacrylic acid emulsion za alkali-swellable, zokhuthala za polyurethane zosakhudzana ndi ionic, ndi zina zotero. Hydroxyethyl cellulose ether thickener imawonjezera kukhuthala kwapakati komanso kotsika kwa utoto wa latex, ndipo ili ndi thixotropy yayikulu. Mtengo wokolola ndi waukulu. Unyolo waukulu wa hydrophobic wa cellulose thickener umagwirizanitsidwa ndi mamolekyulu amadzi ozungulira kudzera mu hydrogen bonding, zomwe zimawonjezera kuchuluka kwa madzi a polima yokha. Malo osunthika kwa tinthu tating'onoting'ono amachepa. Kukhuthala kwa dongosolo kumawonjezeka, ndipo kapangidwe ka netiweki kolumikizidwa pakati pa utoto ndi tinthu ta emulsion. Kuti tilekanitse utoto kuchokera kwa wina ndi mnzake, tinthu ta emulsion sitimamwetsa kawirikawiri.