Kugwiritsa ntchito hydroxyethyl cellulose(HEC) mu utoto wa latex

Hydroxyethyl Cellulose (HEC) ndi yofunika kusungunuka m'madzi ya nonionic cellulose ether, yomwe imagwiritsidwa ntchito kwambiri popanga zokutira, makamaka utoto wa latex. Monga thickener bwino, zoteteza colloid, kuyimitsa wothandizira ndi filimu kupanga thandizo, izo bwino kwambiri ntchito utoto latex, kumapangitsanso zomangamanga za utoto ndi masomphenya zotsatira za mankhwala yomalizidwa.

1. Kapangidwe ka mankhwala ndi katundu wa hydroxyethyl mapadi
Hydroxyethyl cellulose ndi chochokera ku cellulose chomwe chimapangidwa poyambitsa gulu la hydroxyethyl mu molekyulu ya cellulose. Ndi polima yosungunuka m'madzi. Kapangidwe kake ka mankhwala kumatsimikizira kusungunuka kwake kwamadzi komanso kukhuthala kwake. Ikasungunuka m'madzi, imatha kupanga njira yowoneka bwino kwambiri yokhala ndi zomatira bwino, kupanga filimu komanso kukhuthala. Zinthu izi zimagwira ntchito yofunika kwambiri pa utoto wa latex.

Ma cellulose a Hydroxyethyl nthawi zambiri amakhala oyera kapena opepuka achikasu ufa kapena ma granules, omwe amasungunuka mosavuta m'madzi ozizira kapena otentha kuti apange njira yokhazikika ya colloidal. Yankho lake limakhala lokhazikika ndipo limatha kukana asidi, alkali, redox ndi kuwonongeka kwa tizilombo tating'onoting'ono. Kuphatikiza apo, chifukwa chosakhala ionic cha hydroxyethyl cellulose, sichimakhudzana ndi zinthu zina mu utoto wa latex monga ma pigment, fillers kapena zowonjezera, kotero imagwirizana kwambiri ndi utoto wa latex.

2. Njira yopangira hydroxyethyl cellulose mu utoto wa latex
Mu utoto wa latex, gawo la hydroxyethyl cellulose limawonekera makamaka pakukhuthala, kusunga madzi, kukhazikika kokhazikika komanso kugwira ntchito bwino:

Thickening zotsatira: Hydroxyethyl mapadi, monga imayenera thickener, kuonjezera mamasukidwe akayendedwe a latex utoto ndi kuonjezera thixotropy. Izi sizimangolepheretsa utoto kuti usagwedezeke panthawi yosungira ndikugwiritsa ntchito, komanso zimapangitsa kuti utoto ukhale wochuluka ngakhale utakulungidwa kapena kupukuta. Kukula koyenera kumathandizira kuwongolera kamvekedwe ka utoto wa latex, kumapangitsa kumva bwino mukamagwiritsa ntchito, komanso kumathandizira kuphimba filimu.

Kusunga madzi: Hydroxyethyl cellulose imakhala ndi madzi osungira bwino. Pa kuyanika kwa utoto wa latex, imatha kuteteza madzi kuti asatuluke mwachangu, potero kumakulitsa nthawi yonyowa ya penti ndikuonetsetsa kuti ikumangidwa mosalala. Kuonjezera apo, kusungirako madzi abwino kungathenso kuchepetsa kuphulika kwa filimu yophimba pambuyo poyanika, potero kumapangitsa kuti filimu yophimba ikhale yabwino.

Kukhazikika: Hydroxyethyl cellulose, ngati colloid yoteteza, imatha kuteteza inki ndi zodzaza kuti zisakhazikike mu utoto wa latex. Ikhoza kupanga dongosolo lokhazikika la colloidal kupyolera mu yankho la viscous kuti ligawire mofanana chigawo chilichonse ndikuonetsetsa kuti utoto ukhale wokhazikika. Pa nthawi yomweyo, hydroxyethyl mapadi kungathandizenso kukhazikika kwa emulsion particles ndi kupewa delamination ndi agglomeration wa lalabala dongosolo pa yosungirako.

Kumanga: Panthawi yomanga, kukhuthala ndi kudzoza kwa hydroxyethyl cellulose kumapangitsa utoto wa latex kukhala ndi zokutira zabwino komanso zowongolera bwino, zomwe zimatha kuchepetsa ma burashi ndikuwongolera kusalala kwa filimu yokutira. Komanso, chifukwa hydroxyethyl mapadi akhoza kusintha thixotropy wa utoto, utoto lalabala utoto n'zosavuta ntchito pa kupenta ndondomeko, ali fluidity zabwino popanda kudontha, ndi oyenera zosiyanasiyana zomangamanga njira, monga brushing, wodzigudubuza ❖ kuyanika ndi kupopera mbewu mankhwalawa. .

3. Zotsatira zenizeni za hydroxyethyl cellulose mu utoto wa latex
Limbikitsani kusungika kwa penti: Kuonjezera kuchuluka koyenera kwa hydroxyethyl cellulose kumtundu wa utoto wa latex kumatha kupititsa patsogolo mphamvu zoletsa kukhazikika kwa utoto ndikupewa kuyika kwa inki ndi zodzaza. Kubalalika kwa cellulose ya hydroxyethyl mu zokutira kumatha kukhalabe ndi mawonekedwe a ❖ kuyanika ndikuwonjezera nthawi yosungiramo zinthuzo.

Sinthani mawonekedwe a rheological of zokutira: The rheological properties of latex paints ndizofunikira kwambiri pakumanga. Hydroxyethyl mapadi angagwiritse ntchito thixotropy wake wapadera kuti utoto kuyenda mosavuta pansi mkulu kukameta ubweya mphamvu (monga pamene kujambula), ndi kusunga mamasukidwe akayendedwe apamwamba pansi otsika kukameta ubweya mphamvu (monga pamene atayima), kuteteza Sag. Khalidweli limapangitsa utoto wa latex kukhala ndi mapangidwe abwinoko ndi zokutira, kuchepetsa kugwa ndi kugudubuza.

Sinthani mawonekedwe ndi mawonekedwe a filimu yokutira: Hydroxyethyl cellulose imakhala ndi gawo lofunikira pakupanga filimu. Sizingangowonjezera kusalala kwa filimu ya utoto, komanso kumapangitsanso kukana kuvala ndi kukana madzi kwa filimu ya utoto, kukulitsa moyo wautumiki wa filimu ya utoto. Kuonjezera apo, chifukwa cha kusungirako bwino kwa madzi, chophimbacho chimauma mofanana, kuthandizira kupewa mavuto monga makwinya, mapini ndi ming'alu, kupanga pamwamba pa chophimbacho kukhala chosalala.

Kuchita bwino kwa chilengedwe: Ma cellulose a Hydroxyethyl amachokera ku cellulose yachilengedwe, amatha kuwonongeka kwambiri, ndipo sangayipitsa chilengedwe. Poyerekeza ndi zokometsera zopangira zachikhalidwe, ndizokonda zachilengedwe ndipo zimakwaniritsa zofunikira zazomangamanga zobiriwira zamakono. Kuphatikiza apo, ilibe ma organic organic compounds (VOC), kotero kugwiritsa ntchito hydroxyethyl cellulose mu utoto wa latex kumathandiza kuchepetsa mpweya wa VOC ndikuwongolera mpweya wabwino wamalo omanga.

Monga chowonjezera chofunikira mu utoto wa latex, hydroxyethyl cellulose imatha kupititsa patsogolo ntchito yomanga komanso kuyanika komaliza kwa utoto wa latex kudzera pakukhuthala kwake, kusunga madzi, kukhazikika komanso kupanga mafilimu. Panthawi imodzimodziyo, chifukwa cha kutetezedwa kwa chilengedwe ndi makhalidwe otsika a VOC, hydroxyethyl cellulose imakwaniritsa zofunikira zobiriwira ndi zachilengedwe za mafakitale amakono opangira nsalu. Ndi kupita patsogolo kosalekeza kwaukadaulo, chiyembekezo chogwiritsa ntchito hydroxyethyl cellulose mu utoto wa latex chidzakhala chokulirapo, ndikupereka mayankho abwinoko pa chitukuko chokhazikika chamakampani opanga zokutira.