Kugwiritsa ntchito HEC mu utoto wa latex

Hydroxyethyl Cellulose (HEC)ndi polima yosasungunuka m'madzi yomwe si ionic, yomwe imasinthidwa ndi mankhwala kuchokera ku cellulose yachilengedwe. Ili ndi madzi abwino osungunuka, kukhuthala, kusunga madzi komanso kupanga filimu. Mu utoto wa latex, hydroxyethyl cellulose ndi chowonjezera chofunikira ndipo chimagwiritsidwa ntchito kwambiri popanga makoma amkati ndi kunja kuti chikhale chokhuthala, chokhazikika, chobalalitsa, choyimitsa ndikuwonjezera kugwira ntchito.

1. Katundu wamkulu wa hydroxyethyl cellulose

Kusungunuka bwino kwa madzi: HEC imatha kusungunuka mwachangu m'madzi ozizira ndi madzi otentha kuti ipange yankho lowonekera komanso lofanana la colloidal.

Kukhuthala koonekeratu: Kungawonjezere bwino kukhuthala kwa utoto wa latex ndikuwonjezera kugwira ntchito kwake komanso kusinthasintha kwake.

Kukhazikika kwamphamvu kwa suspension: Kungalepheretse kusungunuka kwa utoto ndi zodzaza ndikuwonjezera kukhazikika kwa utoto wa latex.

Makhalidwe abwino opangira filimu: Zimathandiza kupanga filimu yokhuthala komanso kukonza kudzaza ndi kusalala kwa filimu ya utoto.

Kugwirizana kwamphamvu: Kumagwirizana bwino ndi mitundu yosiyanasiyana ya emulsions, pigments, fillers ndi zina zowonjezera. 

2. Udindo wa hydroxyethyl cellulose mu utoto wa latex

Chokhuthala: Chowongolera mphamvu ya utoto m'mafupa, kupewa kudontha ndi kupopera, komanso kukonza magwiridwe antchito a kutsuka ndi kupukuta.

Chosungira madzi: Chimateteza kutayika kwa madzi mu utoto panthawi yomanga ndikuwongolera kapangidwe ka filimu panthawi yowuma.

Chokhazikika: Sinthani kufalikira ndi kukhazikika kwa emulsion ndi pigment filler mu fomula kuti mupewe kugawikana ndi kusonkhana.

Konzani magwiridwe antchito a kamangidwe: Konzani kukhuthala ndi kusalala kwa kamangidwe kuti burashi ikhale yosalala komanso yachilengedwe.

3. Njira yogwiritsira ntchito

3.1. Njira yofalitsira ufa wouma mwachindunji

Zogwiritsidwa ntchito popanga zinthu pogwiritsa ntchito zida zofalikira mwachangu:

Onjezani kuchuluka kwa madzi oyera komwe kwatchulidwa mu thanki yosakanizira;

Yambani kusakaniza mwachangu kwambiri ndipo pang'onopang'ono onjezerani ufa wouma wa HEC;

Pitirizani kusakaniza kwa mphindi 15-30 mpaka HEC itanyowa mokwanira ndikubalalika;

Imani kwa maola 1-2 (kapena kuposerapo) kuti iphuke bwino;

Sakanizaninso mpaka itasungunuka kwathunthu kuti ipange yankho lofanana komanso lowonekera bwino;

Onjezani ma emulsions ena, ma pigment, zowonjezera, ndi zina zotero kuti mupange utoto wa latex.

3.2. Njira ya mowa wothira madzi wothira madzi wokonzedwa kale

Yoyenera kupanga zinthu zambiri, yosavuta kugwiritsa ntchito komanso kuyeza:

Choyamba chonyowetsa HEC ndi madzi;

Pang'onopang'ono tenthetsani mpaka 60-70℃ pansi pa kusakaniza pang'ono kuti isungunuke;

Kapena yambitsani njira yosungunula mwa kuwonjezera pang'ono alkali (monga madzi a ammonia);

Pambuyo posungunuka, mowa wofanana wa gelatinized mother umapangidwa, womwe ukhoza kuwonjezeredwa ku utoto wa latex ngati pakufunika.

4. Malangizo a mlingo

Kuchuluka kwa hydroxyethyl cellulose komwe kumawonjezeredwa ku utoto wa latex nthawi zambiri kumakhala 0.2% ~ 1.0% (kutengera mtundu wa chinthu chomalizidwa), chomwe chimasinthidwa malinga ndi kukhuthala komwe kumafunika komanso magwiridwe antchito omanga.

Kukhuthala (nthawi zambiri kumadalira yankho la madzi la 2%) kuli ndi mitundu yosiyanasiyana ya zosankha, kuyambira makumi a mPa·s mpaka mazana ambiri a mPa·s. Zomwe zimagwiritsidwa ntchito kwambiri ndi izi:

30,000~60,000 mPa·s: ya utoto wa latex wapakatikati komanso wokhuthala kwambiri;

100,000~200,000 mPa·s: ya utoto wokhuthala kapena utoto wopaka.

5. Zodzitetezera

Ndondomeko yofalikira ndi yofunika: ufa wouma uyenera kufalikira mofanana kuti upewe kusonkhana kwa malo ndi kuvutika kusungunuka.

Pewani kuyika mu thumba: Mukawonjezera HEC, sakanizani mwachangu kuti ufa usasungunuke.

Kukhazikika kwa malo osungira: Yankho la HEC liyenera kusungidwa kutentha kwa chipinda kuti lisawonongeke kwa nthawi yayitali ndi kutentha kwambiri kapena malo amphamvu a asidi ndi alkali.

Kuyesa kuyanjana: Kugwirizana kwa HEC ndi ma emulsions ndi zowonjezera kuchokera kwa opanga osiyanasiyana kumatha kusiyana, ndipo fomula iyenera kutsimikiziridwa pambuyo pa mayeso.

Monga chokhuthala chosungunuka m'madzi chogwira ntchito bwino, chotsika mtengo komanso chosawononga chilengedwe, kugwiritsa ntchitohydroxyethyl cellulose mu utoto wa lateximapatsa chinthucho mphamvu yabwino yowongolera rheological komanso luso lomanga. Mwa kusankha bwino mtundu wa kukhuthala, kuwongolera njira yowonjezera ndi chiŵerengero cha formula, magwiridwe antchito a utoto wa latex amatha kukwera kwambiri. Ndi kufunafuna kosalekeza kuteteza chilengedwe ndi magwiridwe antchito mumakampani opanga zophimba zomangamanga, phindu la kugwiritsa ntchito HEC lidzawonekeranso.