I-HEC (i-hydroxyethyl cellulose) iyi-ether ye-nonionic cellulose esetshenziswa kakhulu embonini yokumboza. Imisebenzi yayo ihlanganisa ukuqina, ukuhlakazeka, ukumisa kanye nokuzinzisa, okungathuthukisa ukusebenza kokwakhiwa kanye nomthelela wokwenza ifilimu wezingubo. I-HEC isetshenziswa kabanzi emigqonyeni esekwe emanzini ngoba inokuncibilika kwamanzi okuhle nokuzinza kwamakhemikhali.
1. Indlela yokusebenza ye-HEC
Ukuqina komphumela
Omunye wemisebenzi eyinhloko ye-HEC ekugqokeni ukuqina. Ngokwandisa i-viscosity yesistimu yokumboza, izakhiwo zokumboza nokulinganisa zingathuthukiswa, isenzakalo esibucayi singancishiswa, futhi ukumboza kungakha isendlalelo sokumboza iyunifomu odongeni noma kwezinye izindawo. Ngaphezu kwalokho, i-HEC inekhono eliqinile lokuqina, ngakho-ke ingakwazi ukufeza umphumela omuhle wokuqina ngisho nangenani elincane lokwengeza, futhi inokusebenza kahle kwezomnotho okuphezulu.
Ukumiswa nokuzinzisa
Ehlelweni lokugqoka, izinhlayiya eziqinile ezifana ne-pigments kanye nama-fillers zidinga ukuhlakazeka ngokulinganayo ku-base material, ngaphandle kwalokho kuzothinta ukubukeka nokusebenza kokugqoka. I-HEC ingagcina ngokuphumelelayo ukusatshalaliswa okufanayo kwezinhlayiya eziqinile, ivimbele imvula, futhi igcine ukunamathela kuzinzile ngesikhathi sokugcina. Lo mphumela wokumiswa uvumela ukunamathela ukuthi kubuyele esimweni esifanayo ngemva kokugcinwa isikhathi eside, kunciphisa ukuhlukaniswa kanye nemvula.
Ukugcinwa kwamanzi
I-HEC ingasiza amanzi akupende ukuthi akhululwe kancane phakathi nenqubo yokudweba, ngaleyo ndlela andise isikhathi sokumisa upende futhi enze ukuthi ulinganiswe ngokugcwele futhi wenze ifilimu odongeni. Lokhu kusebenza kokugcinwa kwamanzi kubaluleke kakhulu kumphumela wokwakha, ikakhulukazi ezindaweni zokwakha ezishisayo noma ezomile, i-HEC inganciphisa kakhulu inkinga yokubunjwa kwefilimu empofu okubangelwa ukuguquguquka kwamanzi okusheshayo.
Ukulawulwa kwe-Rheological
Izakhiwo ze-rheological zopende zithinta ngqo umuzwa kanye nekhwalithi yefilimu yokwakhiwa. Isixazululo esakhiwe yi-HEC ngemuva kokuqedwa emanzini sine-pseudoplasticity, okungukuthi, i-viscosity iyancipha ngaphansi kwamandla aphezulu okugcoba (njengokuxubha nokugoqa), okulula ukuxubha; kodwa i-viscosity iyalulama ngaphansi kwamandla aphansi okugunda, okunganciphisa ukuwohloka. Lokhu akusizi nje kuphela ukwakhiwa, kodwa futhi kuqinisekisa ukufana nokushuba kwengubo.
2. Izinzuzo ze-HEC
Ukuncibilika kahle kwamanzi
I-HEC iyisithako se-polymer esincibilika emanzini. Isixazululo esakhiwe ngemva kokuhlakazwa sicacile futhi sisobala, futhi asinayo imiphumela emibi ohlelweni lokupenda olusekelwe emanzini. Ukunyibilika kwayo kuphinde kunqume ukuthi kulula ukuyisebenzisa ohlelweni lukapende, futhi ingancibilika ngokushesha ngaphandle kokukhiqiza izinhlayiya noma ama-agglomerate.
Ukuzinza kwamakhemikhali
Njenge-non-ionic cellulose ether, i-HEC inokuqina okuhle kwamakhemikhali futhi ayithinteki kalula izici ezifana ne-pH, izinga lokushisa, nama-ion ensimbi. Ingakwazi ukuhlala izinzile ezindaweni eziqinile ze-asidi ne-alkaline, ngakho-ke ingakwazi ukuzivumelanisa nezinhlobo ezahlukene zezinhlelo zokumboza.
Ukuvikelwa kwemvelo
Ngokuthuthukiswa kokuqwashisa ngemvelo, i-VOC ephansi (i-volatile organic compound) iya ngokuya ithandwa kakhulu. I-HEC ayinabo ubuthi, ayinabungozi, ayinawo ama-solvents ephilayo, futhi ihlangabezana nezidingo zokuvikela imvelo, ngakho-ke inohlu olubanzi lwamathemba okufaka isicelo emigqeni esekelwe emanzini evumelana nemvelo.
3. Umthelela we-HEC ekusebenzeni okungokoqobo
Izingubo zodonga zangaphakathi
Ezingxenyeni zodonga zangaphakathi, i-HEC njenge-thickener ne-rheology modifier ingathuthukisa ukusebenza kokwakhiwa kwe-coating, inikeze izinga elihle nokunamathela. Ukwengeza, ngenxa yokugcinwa kwamanzi okuhle kakhulu, i-HEC ingavimbela imifantu noma impushana yezingubo zangaphakathi zodonga phakathi nenqubo yokumisa.
Izingubo zodonga zangaphandle
Izingubo zodonga zangaphandle zidinga ukumelana nesimo sezulu esihle kakhulu nokumelana namanzi. I-HEC ayikwazi nje ukuthuthukisa ukugcinwa kwamanzi kanye ne-rheology ye-coating, kodwa futhi ithuthukise impahla yokulwa nokugubha kwe-coating, ukuze ukugqoka kungamelana kangcono nomoya nemvula ngemva kokwakhiwa nokwandisa impilo yayo yesevisi.
Upende we-latex
Ngopende we-latex, i-HEC ayikwazi nje ukwenza njenge-thickener, kodwa futhi ithuthukise ubuhle bepende futhi yenze ifilimu yokugqoka ibe bushelelezi. Ngesikhathi esifanayo, i-HEC ingavimbela imvula yezingulube, ithuthukise ukuzinza kwesitoreji sikapende, futhi yenze upende we-latex uzinze ngemva kokugcinwa isikhathi eside.
IV. Izinyathelo zokwengeza nokusebenzisa i-HEC
Indlela yokuhlakaza
I-HEC ivamise ukungezwa kupende ngendlela eyimpuphu. Uma usebenzisa, idinga ukungezwa kancane kancane emanzini futhi igxilwe ngokugcwele ukuze ichithe ngokulinganayo. Uma ukuchithwa kunganele, izinto ze-granular zingavela, ezithinta ikhwalithi yokubukeka kopende.
Ukulawula umthamo
Inani le-HEC lidinga ukulungiswa ngokuya ngefomula kapende kanye nomphumela wokuqina odingekayo. Isamba esingeziwe esijwayelekile singu-0.3% -1.0% yenani eliphelele. Ukwengeza ngokweqile kuzokwenza ukuthi i-viscosity yepende ibe phezulu kakhulu, ethinta ukusebenza kokwakhiwa; Ukwengeza okunganele kuzodala izinkinga njengokuwohloka kanye namandla okucasha anganele.
Ukuhambisana nezinye izithako
Uma usebenzisa i-HEC, qaphela ukuhambisana nezinye izithako zopende, ikakhulukazi ama-pigment, izigcwalisi, njll. Ezinhlelweni ezihlukene zopende, uhlobo noma inani le-HEC kungase kudingeke ukuba kulungiswe ukuze kugwenywe ukusabela okubi.
I-HEC ibamba iqhaza elibalulekile embonini yokumboza, ikakhulukazi emanzini asekelwe emanzini. Ingathuthukisa ukusebenza, izakhiwo zefilimu kanye nokuzinza kwesitoreji sezingubo, futhi inokuqina okuhle kwamakhemikhali nokuvikelwa kwemvelo. Njengesiguquli se-thickener ne-rheology esingabizi kakhulu, i-HEC isetshenziswa kakhulu embotsheni yangaphakathi yodonga, embozweni yangaphandle nopende be-latex. Ezisetshenziswa ezingokoqobo, ngokusebenzisa ukulawulwa kwemithamo okunengqondo nezindlela ezilungile zokuqedwa, i-HEC inganikeza imiphumela efanelekile yokuqina nokuqiniswa kwezingubo zokugqoka futhi ithuthukise ukusebenza okuphelele kwezingubo.
Isikhathi sokuthumela: Nov-01-2024