Hydroxyethyl cellulose (HEC) ndi yoyera kapena yopepuka yachikasu, yopanda fungo, yopanda poizoni kapena yolimba. Amapangidwa ndi ma linter a thonje yaiwisi kapena zamkati zonyowa zoviikidwa mu 30% yamadzimadzi a caustic soda. Pambuyo pa theka la ola, imatulutsidwa ndikukanikizidwa. Finyani mpaka chiŵerengero cha madzi amchere chifike pa 1: 2.8, ndiye kuphwanya. Imakonzedwa ndi etherification reaction ndipo ndi ya non-ionic soluble cellulose ethers. Hydroxyethyl cellulose ndi yofunika kwambiri mu utoto wa latex. Tiyeni tiwone momwe tingagwiritsire ntchito hydroxyethyl cellulose HEC mu utoto wa latex ndi njira zopewera.
1. Okhala ndi chakumwa cha mayi kuti agwiritse ntchito: choyamba gwiritsani ntchito hydroxyethyl cellulose HEC pokonzekera mowa wa mayi wochuluka kwambiri, ndiyeno muwonjezere ku mankhwalawo. Ubwino wa njirayi ndikuti umakhala ndi kusinthasintha kwakukulu ndipo ukhoza kuwonjezeredwa mwachindunji ku mankhwala omalizidwa, koma ayenera kusungidwa bwino. Masitepe a njirayi ndi ofanana ndi masitepe ambiri mu njira 2; kusiyana ndi kuti palibe chifukwa mkulu-kumeta ubweya agitator, ndi ena agitators ndi mphamvu zokwanira kusunga mapadi hydroxyethyl uniformly omwazika mu yankho akhoza kupitilizidwa popanda kusiya Kusonkhezera mpaka kwathunthu kusungunuka mu njira viscous. Komabe, ziyenera kudziwidwa kuti fungicide iyenera kuwonjezeredwa ku mowa wa amayi posachedwa.
2. Onjezani mwachindunji panthawi yopanga: njirayi ndi yosavuta komanso imatenga nthawi yochepa kwambiri. Onjezani madzi oyera pachidebe chachikulu chokhala ndi chosakaniza chometa ubweya wambiri. Yambani kugwedeza mosalekeza pa liwiro lotsika ndikusefa pang'onopang'ono hydroxyethyl cellulose mu yankho mofanana. Pitirizani kusonkhezera mpaka particles zonse zilowerere. Kenaka yikani zotetezera ndi zina zowonjezera. Monga inki, dispersing zothandizira, ammonia madzi, etc. Muziganiza mpaka onse hydroxyethyl mapadi HEC kusungunuka kwathunthu (kukhuthala kwa yankho kumawonjezera mwachionekere) ndiyeno kuwonjezera zigawo zina mu chilinganizo cha anachita.
Popeza pamwamba ankachitira hydroxyethyl mapadi HEC ndi ufa kapena fibrous olimba, pokonzekera hydroxyethyl mapadi mowa mayi, tcherani khutu mfundo zotsatirazi:
(1) Pogwiritsira ntchito high-viscosity hydroxyethyl cellulose HEC, ndende ya mowa wa mayi sayenera kupitirira 2.5-3% (ndi kulemera kwake), mwinamwake mowa wa amayi udzakhala wovuta kupirira.
(2) Isanayambe komanso itatha kuwonjezera hydroxyethyl cellulose HEC, iyenera kugwedezeka mosalekeza mpaka yankho likuwonekera bwino komanso lomveka bwino.
(3) Momwe mungathere, onjezani antifungal wothandizira pasadakhale.
(4) Kutentha kwa madzi ndi pH mtengo wa madzi zimagwirizana bwino ndi kusungunuka kwa cellulose ya hydroxyethyl, kotero chisamaliro chapadera chiyenera kulipidwa.
(5) Osawonjezera zinthu za alkaline kusakaniza ufa wa hydroxyethyl cellulose usanavidwe ndi madzi. Kukweza pH pambuyo pakuviika kumathandizira kusungunuka.
(6) Iyenera kusefa pang'onopang'ono mu thanki yosanganikirana, ndipo musawonjezere zambiri kapena kuwonjezera mwachindunji cellulose ya hydroxyethyl yomwe yapanga zotupa ndi mipira mu thanki yosakaniza.
Zinthu zofunika zomwe zimakhudza kukhuthala kwa utoto wa latex:
(1) Kudzimbirira kwa thickener ndi tizilombo.
(2) Popanga utoto, ngati masitepe owonjezera a thickener ndi oyenera.
(3) Kaya kuchuluka kwa activator yapamtunda ndi madzi ogwiritsidwa ntchito mu utoto wa utoto ndizoyenera.
(4) Chiŵerengero cha kuchuluka kwa zowonjezera zina zachilengedwe ndi kuchuluka kwa hydroxyethyl cellulose mu mapangidwe a utoto.
(5) Pamene latex aumbike, zili zotsalira chothandizira ndi oxides ena.
(6) Kutentha kumakhala kokwera kwambiri panthawi yobalalika chifukwa cha kugwedezeka kwakukulu.
(7) Kuchuluka kwa thovu la mpweya kumakhalabe mu utoto, kumapangitsanso kukhuthala.
Kukhuthala kwa hydroxyethyl cellulose HEC kumasintha pang'ono mu pH ya 2-12, koma kukhuthala kumachepera kuposa izi. Lili ndi katundu wa thickening, kuyimitsa, kumanga, emulsifying, dispersing, kusunga chinyezi ndi kuteteza colloid. Mayankho osiyanasiyana mamasukidwe akayendedwe osiyanasiyana akhoza kukonzekera. Kusakhazikika pansi pa kutentha kwabwino ndi kupanikizika, kupewa chinyezi, kutentha, ndi kutentha kwakukulu, ndipo kumakhala ndi mchere wabwino kwambiri wosungunuka ku dielectrics, ndipo njira yake yamadzimadzi imaloledwa kukhala ndi mchere wambiri ndipo imakhala yokhazikika.
Nthawi yotumiza: Apr-01-2023