I-Hydroxyethyl cellulose (HEC) yi-solid emhlophe okanye etyheli kancinci, engenavumba, engenatyhefu okanye enomgubo. Yenziwe ngee-linters zekotoni eluhlaza okanye i-pulp ecoliweyo efakwe kwi-30% ye-caustic soda engamanzi. Emva kwesiqingatha seyure, iyakhutshwa kwaye icinezelwe. Cinezela ude umlinganiselo wamanzi e-alkaline ufikelele kwi-1:2.8, uze uyityumze. Ilungiswa nge-etherification reaction kwaye iyinxalenye ye-non-ionic soluble cellulose ethers. I-Hydroxyethyl cellulose yinto etyebisayo ebalulekileyo kwipeyinti ye-latex. Masigxile kwindlela yokusebenzisa i-hydroxyethyl cellulose HEC kwipeyinti ye-latex kunye neendlela zokuzikhusela.
1. Ixhotyiswe ngotywala bomama ukuze isetyenziswe: qala usebenzise i-hydroxyethyl cellulose HEC ukulungiselela utywala bomama obunoxinzelelo oluphezulu, uze uyifake kwimveliso. Inzuzo yale ndlela kukuba inokuguquguquka okukhulu kwaye ingongezwa ngokuthe ngqo kwimveliso egqityiweyo, kodwa kufuneka igcinwe kakuhle. Amanyathelo ale ndlela afana namanyathelo amaninzi kwindlela yesi-2; umahluko kukuba akukho mfuneko ye-agitator ephezulu, kwaye kuphela ezinye i-agitators ezinamandla aneleyo okugcina i-hydroxyethyl cellulose isasazeke ngokulinganayo kwisisombululo ezinokuqhubeka ngaphandle kokumisa. Hlanganisa ide inyibilike ngokupheleleyo ibe sisisombululo esiqinileyo. Nangona kunjalo, kufuneka kuqatshelwe ukuba i-fungicide kufuneka yongezwe kwi-alcohol yomama ngokukhawuleza.
2. Yongeza ngokuthe ngqo ngexesha lokuvelisa: le ndlela yeyona ilula kwaye ithatha ixesha elifutshane. Yongeza amanzi acocekileyo kwibhakethi enkulu exhotyiswe ngomxube ocoliweyo kakhulu. Qala ukuxuba rhoqo ngesantya esiphantsi kwaye uhluze kancinci i-hydroxyethyl cellulose kwisisombululo ngokulinganayo. Qhubeka uxuba de zonke iisuntswana zimanzi. Emva koko yongeza izithinteli kunye nezongezo ezahlukeneyo. Ezifana neepigment, izixhobo zokusasaza, amanzi e-ammonia, njl. Xuba de yonke i-hydroxyethyl cellulose HEC ichithwe ngokupheleleyo (i-viscosity yesisombululo iyanda ngokucacileyo) uze wongeze ezinye izinto kwifomyula yokusabela.
Ekubeni i-hydroxyethyl cellulose HEC ephathwa ngaphezulu ifana ne-powdery okanye i-fibrous solid, xa ulungiselela i-hydroxyethyl cellulose mother liquor, qaphela la manqaku alandelayo:
(1) Xa usebenzisa i-hydroxyethyl cellulose HEC ene-viscosity ephezulu, uxinzelelo lotywala oluvela kumama akufuneki lube ngaphezulu kwe-2.5-3% (ngokobunzima), kungenjalo utywala obuvela kumama buya kuba nzima ukuluphatha.
(2) Ngaphambi nasemva kokufaka i-hydroxyethyl cellulose HEC, kufuneka ixutywe rhoqo de isisombululo sibe sobala ngokupheleleyo kwaye sicace gca.
(3) Kangangoko kunokwenzeka, yongeza i-antifungal agent kwangaphambili.
(4) Ubushushu bamanzi kunye nexabiso le-pH yamanzi zinobudlelwane obucacileyo nokunyibilika kwe-hydroxyethyl cellulose, ngoko ke kufuneka kunikwe ingqalelo ekhethekileyo.
(5) Musa ukongeza ezinye izinto ze-alkaline kumxube ngaphambi kokuba umgubo we-hydroxyethyl cellulose ufakwe emanzini. Ukunyusa i-pH emva kokuyifaka emanzini kuya kunceda ukunyibilika.
(6) Kufuneka ihluzwe kancinci kancinci kwi-tank yokuxuba, kwaye ungayongezi i-hydroxyethyl cellulose eyenze amaqhuma kunye neebhola kwi-tank yokuxuba.
Izinto ezibalulekileyo ezichaphazela ukuqaqamba kwepeyinti yelatex:
(1) Ukubola kwesinyibilikisi ziintsholongwane.
(2) Kwinkqubo yokwenza ipeyinti, ingaba ulandelelwano lwamanyathelo okongeza i-thickener lufanelekile na.
(3) Ingaba ubungakanani bomphezulu wesixhobo sokuvuselela kunye namanzi asetyenzisiweyo kwifomula yepeyinti bufanelekile na.
(4) Umlinganiselo wobungakanani bezinye izinto zokutyebisa zendalo kunye nobungakanani be-hydroxyethyl cellulose kwifomyula yepeyinti.
(5) Xa i-latex yenziwe, umxholo wee-catalysts eziseleyo kunye nezinye ii-oxides uyanda.
(6) Ubushushu buphezulu kakhulu ngexesha lokusasazeka ngenxa yokuxukuxa kakhulu.
(7) Okukhona amaqamza omoya amaninzi ehlala kwipeyinti, kokukhona i-viscosity iphakama.
I-viscosity ye-hydroxyethyl cellulose HEC itshintsha kancinci kuluhlu lwe-pH oluyi-2-12, kodwa i-viscosity iyancipha ngaphaya kolu luhlu. Ineempawu zokutyeba, ukuxhoma, ukubopha, ukuxuba, ukusasaza, ukugcina umswakama kunye nokukhusela i-colloid. Izisombululo kwiindidi ezahlukeneyo ze-viscosity zinokulungiswa. Azizinzanga phantsi kobushushu obuqhelekileyo kunye noxinzelelo, kuphephe ukufuma, ubushushu, kunye nobushushu obuphezulu, kwaye inokunyibilika kwetyuwa okuhle kakhulu kwi-dielectrics, kwaye isisombululo sayo samanzi sivunyelwe ukuba siqulathe amazinga aphezulu eetyuwa kwaye sihlale sizinzile.
Ixesha lokuthumela: Epreli-01-2023