I-Hydroxyethyl cellulose (HEC) iyi-fibrous emhlophe noma ekhanyayo, engenaphunga, engenabuthi noma eqinile. Yenziwe ngamalitha kakotini aluhlaza noma i-pulp ecolisisiwe efakwe ku-30% we-caustic soda ewuketshezi. Ngemva kwesigamu sehora, iyakhishwa futhi icindezelwe. Cindezela kuze kube yilapho isilinganiso samanzi ane-alkali sifinyelela ku-1: 2.8, bese uchoboza. Ilungiswa ngokusabela kwe-etherification futhi ingeka-non-ionic soluble cellulose ethers. I-Hydroxyethyl cellulose iwugqinsi obalulekile kupende we-latex. Ake sigxile endleleni yokusebenzisa i-hydroxyethyl cellulose HEC kupende we-latex kanye nezinyathelo zokuphepha.
1. Ifakwe utshwala bukamama obuzosetshenziswa: qala usebenzise i-hydroxyethyl cellulose HEC ukuze ulungisele umama utshwala obunomthamo omkhulu, bese ulengeza emkhiqizweni. Inzuzo yale ndlela yukuthi inokuguquguquka okukhulu futhi ingafakwa ngokuqondile kumkhiqizo ophelile, kodwa kufanele igcinwe kahle. Izinyathelo zale ndlela zifana nezinyathelo eziningi endleleni yesi-2; umehluko wukuthi asikho isidingo se-high-shear agitator, futhi ama-agitator athile kuphela anamandla anele okugcina i-hydroxyethyl cellulose ihlakazeke ngokulinganayo kusixazululo ingaqhutshwa ngaphandle kokumisa Ukugqugquzela kuze kube yilapho kuqedwa ngokuphelele kusixazululo se-viscous. Kodwa-ke, kufanele kuqashelwe ukuthi umuthi obulala isikhunta kufanele ufakwe etshwaleni likamama ngokushesha okukhulu.
2. Engeza ngokuqondile ngesikhathi sokukhiqiza: le ndlela ilula kakhulu futhi ithatha isikhathi esifushane kakhulu. Faka amanzi ahlanzekile ebhakedeni elikhulu elifakwe umxube wokugunda okuphezulu. Qala ukunyakazisa ngokuqhubekayo ngesivinini esiphansi bese uhlunga kancane kancane i-hydroxyethyl cellulose esixazululweni ngokulinganayo. Qhubeka ugoqa kuze kube yilapho zonke izinhlayiya sezicwile. Bese wengeza ama-preservatives kanye nezithasiselo ezihlukahlukene. Okufana nezingulube, izinsiza zokusabalalisa, amanzi e-ammonia, njll. Gcoba kuze kube yilapho yonke i-hydroxyethyl cellulose HEC ichitheka ngokuphelele (i-viscosity yesisombululo iyanda ngokusobala) bese wengeza ezinye izingxenye kufomula yokusabela.
Njengoba i-hydroxyethyl cellulose HEC ehlanjululwe phezulu iyimpuphu noma i-fibrous solid, lapho ulungiselela ugologo kamama we-hydroxyethyl cellulose, naka amaphuzu alandelayo:
(1) Uma usebenzisa i-high-viscosity hydroxyethyl cellulose HEC, ukugxila kotshwala kamama akufanele kube ngaphezu kuka-2.5-3% (ngesisindo), ngaphandle kwalokho utshwala bomama buyoba nzima ukuphatha.
(2) Ngaphambi nangemva kokwengeza i-hydroxyethyl cellulose HEC, kufanele inyakaziswe ngokuqhubekayo kuze kube yilapho isisombululo sisobala ngokuphelele futhi sicacile.
(3) Ngangokunokwenzeka, engeza i-ejenti ye-antifungal kusengaphambili.
(4) Izinga lokushisa lamanzi nenani le-pH lamanzi kunobudlelwane obusobala nokuqedwa kwe-hydroxyethyl cellulose, ngakho-ke kufanele kuqashelwe ngokukhethekile.
(5) Ungangezi ezinye izinto ezine-alkali engxubeni ngaphambi kokuba i-hydroxyethyl cellulose powder icwiliswe ngamanzi. Ukuphakamisa i-pH ngemva kokucwiliswa kuzosiza ukuncibilika.
(6) Kumelwe ihlungwe kancane kancane ethangini lokuxuba, futhi ungangezi amanani amakhulu noma wengeze ngokuqondile i-hydroxyethyl cellulose eyenze izigaxa namabhola ethangini lokuxuba.
Izici ezibalulekile ezithinta i-viscosity kapende we-latex:
(1) Ukugqwala kwe-thickener yizinambuzane ezincane.
(2) Enqubweni yokwenza upende, noma ngabe ukulandelana kwesinyathelo sokwengeza i-thickener kufanelekile.
(3) Ukuthi inani le-activator engaphezulu namanzi asetshenziswe kufomula kapende afanelekile.
(4) Isilinganiso senani lezinye izingqimba zemvelo nenani le-hydroxyethyl cellulose ekwakhiweni kukapende.
(5) Lapho i-latex yakheka, okuqukethwe kwama-catalysts asele namanye ama-oxide.
(6) Izinga lokushisa liphezulu kakhulu ngesikhathi sokuhlakazwa ngenxa yokunyakazisa ngokweqile.
(7) Uma amabhamuza omoya engeziwe ehlala kupende, i-viscosity iyanda.
I-viscosity ye-hydroxyethyl cellulose HEC ishintsha kancane ebangeni le-pH lika-2-12, kodwa i-viscosity iyancipha ngale kwalolu bubanzi. Inezici zokuqina, ukumisa, ukubopha, i-emulsifying, ukusabalalisa, ukugcina umswakama nokuvikela i-colloid. Izixazululo kumabanga ahlukene we-viscosity zingalungiswa. Ayizinzile ngaphansi kwezinga lokushisa elivamile nokucindezela, gwema umswakama, ukushisa, nezinga lokushisa eliphezulu, futhi inokuncibilika okuhle kakhulu kukasawoti kuma-dielectrics, futhi isixazululo sayo esinamanzi sivunyelwe ukuqukatha ukugxila okuphezulu kukasawoti futhi sihlale sizinzile.
Isikhathi sokuthumela: Apr-01-2023