Uyengeza Kanjani I-HEC ku-Latex Paint?

I-Hydroxyethyl cellulose (HEC) i-nonionic thickener ne-rheology esetshenziswa kakhulu kupende we-latex. Ithuthukisa ngempumelelo ukwakheka kwe-viscosity, izakhiwo zokulinganisa, ukuzinza kwesitoreji, nokusebenza kwe-anti-splatter kohlelo. Ukwengeza kahle i-HEC ekwenziweni kopende we-latex akuthinti nje kuphela izindleko zomkhiqizo kodwa futhi kuthinta ngokuqondile ikhwalithi yefilimu kapende nomuzwa wohlelo. Okulandelayo kunikeza incazelo ehlelekile evela ezicini ezine: ukukhetha, umthamo, indlela yokwengeza, kanye nezinyathelo zokuphepha.

1. Ukukhetha Ibanga Elifanelekile Le-Viscosity Ngokusekelwe Ohlotsheni Lwepende Ye-Latex

1.1. I-Wall Latex Paint Yangaphakathi (Umnotho/Uhlobo Olujwayelekile)

Kunconywa ukusebenzisa i-HEC ye-viscosity ephakathi kuya phezulu ene-viscosity ye-30,000-60,000 mPa·s. Izinzuzo zayo zihlanganisa ukusebenza kahle kokuqina okuphezulu, ukusebenza kahle kwezindleko, kanye nekhono lokuhlangabezana nezidingo zokulinganisa kanye ne-thixotropic zamapende angaphakathi odongeni avamile.

1.2. Ipende ephezulu Yangaphakathi Yangaphakathi Yangaphakathi (Matte, Satin)

Imikhiqizo ye-viscosity ephezulu ene-viscosity ye-60,000-100,000 mPa·s ingakhethwa, okuholela ekuqedeni okushelelayo, okujiyile kanye nezakhiwo ezingcono zokulwa ne-splatter ngesikhathi sokufakwa.

1.3. Upende Wangaphandle We-Latex Wangaphandle

Ukuze kuthuthukiswe i-anti-sagging kanye nokumelana namanzi, i-medium viscosity HEC (30,000-60,000 mPa·s) isetshenziswa ngokuvamile, ivamise ukuhlanganiswa nama-cellulose ethers noma ama-PU thickeners ukuze kuzuzwe amandla angcono esivuno nokuzinza kwesitoreji.

1.4. Amasistimu e-PVC aphezulu (I-Putty-type Latex Paints)

Ama-HEC aphakeme kakhulu ayadingeka ukuze kuqinisekiswe ubuqotho besakhiwo kanye nokuvimbela ukuhlaliswa nokuhlukaniswa.

Ngokuvamile, ukukhetha kwebanga le-viscosity kufanele kulinganise umphumela wokuqina, izindleko, nokusebenza kwesicelo; i-viscosity ephakeme ayihlali ingcono.

2. Ukulawula Okunengqondo Kwesengezo se-HEC

2.1. 0.2%-0.6% (kusekelwe kumkhiqizo oqediwe)

Opende abajwayelekile bodonga lwangaphakathi ngokuvamile basebenzisa u-0.25%-I-0.40%, kuyilapho izimbobo eziphezulu noma izinhlelo ze-PVC eziphezulu zingafinyelela cishe ku-0.5%.

2.2. Inani elingeziwe kufanele lilungiswe kancane ngokusekelwe kulezi zinto ezilandelayo:

Imithamo ye-pigment ne-filler nevelu ye-PVC: Uma i-PVC iphakeme, kudingeka i-HEC eyengeziwe.

Uhlobo lwe-emulsion: Ama-emulsion anengxenye ephezulu yezinto ezakha ifilimu nokuhlangana okuqinile adinga ukuqina kancane kancane.

I-viscosity eqondiwe: Izindlela ezihlukene zohlelo lokusebenza ziholela ekuhlukeni okukhulu ku-viscosity edingekayo.

Ukuhambisana namanye ama-thickeners: Uma kuhlanganiswa ne-HEUR, i-ASE, njll., umthamo we-HEC ungancishiswa ngokufanelekile.

RIsilinganiso esifanelekile se-HEC kufanele sifinyelelwe: i-viscosity emile emaphakathi, ukuzinza kwesistimu, akukho ukufafaza ngesikhathi sokufaka isicelo, nomuzwa wokuxubha okushelelayo.

3. Izindlela Ezilungile Zokwengeza kanye Nokuqedwa

3.1. Indlela Yesixazululo Sesitoko Esilungiselelwe kusengaphambili (Kunconyiwe)

Lungiselela isixazululo esisobala, esibonakalayo se-HEC ngesilinganiso esingu-1:20-1:40 ngaphambi kokuyengeza ohlelweni lokupenda lwe-latex. Izinzuzo:

Ukuqedwa ngokuphelele, azikho izinhlayiya zeso lezinhlanzi

Ikhuthaza ukulungiswa kahle kwe-viscosity

Igwema umthelela wasendaweni wokujiya ku-emulsion

Isixazululo sesitoko kufanele sihlakazwe 1-2 amahora kusengaphambili.

3.2. Indlela Yokwengeza Impushana Eyomile Eqondile (Idinga Ukulawulwa Okuqinile)

Uma ukufakwa kwempushana eyomile kuyadingeka, landela le mihlahlandlela:

Sefa kancane ngenkathi uhlakaza ngesivinini esikhulu ukuvikela ukuqumba

Engeza ngesikhathi sesigaba samanzi, ukuqedwa ngokuphelele ngaphambi kokungeza ku-emulsion

Isikhathi sokuhlakazeka akufanele sibe ngaphansi kwama-20-Imizuzu engama-30

Engeza i-ejenti yokumanzisa ngaphambili noma sebenzisa i-HEC ehlakazeka ngokushesha uma kudingeka ukuze unciphise ukunqwabelana.

4. Amasu Okuthuthukisa I-Rheological Effects Yesistimu

4.1. Sebenzisa nge-HEUR/ASE

Uhlelo oluhlanganisiwe luthuthukisa kakhulu i-thixotropy, luthuthukise izakhiwo zokulwa ne-splatter kanye nokubeka izinga, futhi lwenza uhlelo lokusebenza lube bushelelezi.

4.2. Ukulawulwa kwe-pH kanye nohlelo Lokulondoloza

I-HEC isebenza kahle kakhulu ebangeni le-pH lika-7-11; i-acidity eningi inganciphisa kalula i-viscosity. Ezinye izilondolozi zingathinta izinga lokuqedwa kwe-HEC.

4.3. Ukulawulwa Kokuqina Kwesitoreji

Ngesikhathi sokugcina isikhathi eside emazingeni okushisa aphezulu, i-high-viscosity HEC ingase ithole ukwehla kwe-viscosity. Ngakho-ke, imikhiqizo elungiswe phezulu ingakhethwa.

4.4. Ukuvimbela Ukuqina Okungamanga Nokugwedla

Ngemuva kokuthola i-viscosity ehlosiwe ekubunjweni, ukuhlolwa kokuxubha, ukugoqa, kanye nokuhlehla kufanele kwenziwe. Isilinganiso se-HEC kufanele-ke sishunwe kahle ukuze kuqinisekiswe ukuzwakala kwesicelo okungaguquki.

Ukwengezwa okufanele kweI-HEC ukuze upende we-latex udinga ukucatshangelwa okuphelele kokukhethwa kwebanga le-viscosity, ukulawulwa kwemithamo, indlela yokuqedwa, kanye nokwenza kahle kwesakhiwo se-rheological. Ukukhetha i-HEC efanele nokuyisebenzisa ngendlela efanele akuthuthukisi nje kuphela ukusebenza kahle nokubukeka kwekhwalithi kapende kodwa futhi kuthuthukisa ukuzinza kwesitoreji kanye nezinga lomkhiqizo, okuyenza ibe isici esibalulekile sokuthuthukisa ikhwalithi kapende we-latex.