I-Hydroxyethyl cellulose (HEC) yi-agent eguquguqukayo kwaye isetyenziswa ngokubanzi kwiipeyinti kunye neengubo. Isebenza imisebenzi emininzi, iphucula ukusebenza, uzinzo, kunye neempawu zokusetyenziswa kwezi mveliso. Ngezantsi isikhokelo esibanzi malunga nendlela yokusebenzisa ngokufanelekileyo i-hydroxyethyl cellulose kwiipeyinti kunye neengubo, ezigubungela izibonelelo zayo, iindlela zokusetyenziswa, kunye nokuqwalaselwa kokuqulunqwa.
Izibonelelo zeHydroxyethyl Cellulose kwiipeyinti kunye neeCoatings
Ukuguqulwa kweRheology: I-HEC inika ukuhamba okunqwenelekayo kunye neempawu zokulinganisa kwiipeyinti kunye neengubo, ukubanceda ukuba zisasazeke ngokulinganayo kunye nokunciphisa ukugoba.
Ukuphuculwa kozinzo: Uzinzisa i-emulsion kwaye unqande ukuhlukana kwesigaba, ukuqinisekisa ukusabalalisa okufanayo kwee-pigments kunye nezizaliso.
IiPropati eziphuculweyo zeSicelo: Ngokulungelelanisa i-viscosity, i-HEC yenza ukuba ipeyinti ibe lula ukuyisebenzisa, nokuba yi-brush, roller, okanye spray.
Ukugcinwa kwamanzi: I-HEC ineempawu ezigqwesileyo zokugcina amanzi, ezibaluleke kakhulu ekugcineni ukusebenza kwepeyinti kunye neengubo, ngakumbi kwiimeko ezomileyo.
Ukuhambelana: I-HEC iyahambelana noluhlu olubanzi lwe-solvents, i-pigments, kunye nezinye izongezo, okwenza ukuba zilungele ukuxutywa kweentlobo ezahlukeneyo.
Iindlela zokuSebenza
1. Ukudibanisa okomileyo
Enye indlela eqhelekileyo yokubandakanya i-HEC kwiifom zepeyinti kukudibanisa okomileyo:
Inyathelo 1: Linganisa inani elifunekayo le-HEC powder.
Inyathelo lesi-2: Kancinci wongeza i-HEC powder kwezinye iinxalenye ezomileyo zokwenziwa.
Inyathelo lesi-3: Qinisekisa ukuxuba ngokucokisekileyo ukunqanda ukudityaniswa.
Inyathelo lesi-4: Kancinci ukongeza amanzi okanye i-solvent ngelixa udibanisa ngokuqhubekayo de i-HEC ifakwe ngokupheleleyo kwaye umxube we-homogeneous ufezekisiwe.
Ukudibanisa okomileyo kukulungele ukuqulunqwa apho ulawulo oluchanekileyo kwi-viscosity lufunekayo ukususela ekuqaleni.
2. Ukulungiswa kwesisombululo
Ukulungiselela isisombululo sesitokhwe se-HEC ngaphambi kokusifaka kuyilo lwepeyinti yenye indlela esebenzayo:
Inyathelo 1: Ukusasaza umgubo we-HEC emanzini okanye kwi-solvent efunwayo, uqinisekisa ukuphazamiseka okuqhubekayo ukukhusela ukubunjwa kweqhuma.
Inyathelo lesi-2: Vumela ixesha elaneleyo lokuba i-HEC ikhuphe ngokupheleleyo kwaye inyibilike, ngokuqhelekileyo iiyure ezininzi okanye ubusuku bonke.
Inyathelo lesi-3: Yongeza esi sisombululo sesitokhwe ekubunjweni kwepeyinti ngelixa uvuselela de kube ukuhambelana okufunwayo kunye neempawu zifezekiswa.
Le ndlela ivumela ukuphatha lula kunye nokufakwa kwe-HEC, ngakumbi kwimveliso enkulu.
Ukuqwalaselwa koqulunqo
1. Ukugxininisa
Ukugxininiswa kwe-HEC efunekayo ekuqulunqweni kwepeyinti kuyahluka ngokuxhomekeke kwi-viscosity efunwayo kunye nendlela yesicelo:
Izicelo ze-Low-Shear: Ukusetyenziswa kwebrashi okanye i-roller, i-concentration ephantsi ye-HEC (0.2-1.0% ngesisindo) inokwanela ukufezekisa i-viscosity efunekayo.
Ukusetyenziswa kwe-High-Shear: Ukusetyenziswa kokutshiza, ugxininiso oluphezulu (1.0-2.0% ngobunzima) lunokuba yimfuneko ukunqanda ukudodobala kunye nokuqinisekisa i-atomization elungileyo.
2. Uhlengahlengiso lwe-pH
I-pH yokwenziwa kwepeyinti inokuchaphazela ukunyibilika kunye nokusebenza kwe-HEC:
Uluhlu lwe-pH olufanelekileyo: I-HEC isebenza kakhulu kwi-neutral ukuya kwi-alkaline encinci ye-pH (pH 7-9).
Ukulungelelaniswa: Ukuba ukubunjwa ku-acidic kakhulu okanye i-alkaline kakhulu, lungisa i-pH usebenzisa izongezo ezifanelekileyo ezifana ne-ammonia okanye i-organic acids ukunyusa ukusebenza kwe-HEC.
3. Ubushushu
Ubushushu budlala indima ebalulekileyo kumanzi kunye nokuchithwa kwe-HEC:
I-Cold Water Soluble: Amanye amabakala e-HEC enzelwe ukunyibilika emanzini abandayo, anokwenza lula inkqubo yokuxuba.
Ukukhawuleza kwamanzi afudumeleyo: Kwezinye iimeko, ukusebenzisa amanzi afudumeleyo kunokukhawuleza inkqubo ye-hydration, kodwa amaqondo okushisa angaphezu kwama-60 ° C kufuneka agwenywe ukukhusela ukuthotywa kwepolymer.
4. Ukuhambelana nezinye izithako
I-HEC kufuneka ihambelane nezinye izithako ekuqulunqweni ukuphepha imiba efana nokwakhiwa kwejel okanye ukuhlukana kwesigaba:
I-Solvents: I-HEC iyahambelana neenkqubo zombini ezisekelwe kumanzi kunye ne-solvent-based, kodwa kufuneka kuthathelwe ingqalelo ukuze kuqinisekiswe ukuchithwa ngokupheleleyo.
I-Pigments kunye ne-Fillers: I-HEC inceda ukuzinzisa i-pigments kunye nokuzalisa, ukuqinisekisa ukusabalalisa okufanayo kunye nokuthintela ukuhlaliswa.
Ezinye izongezo: Ubukho be-surfactants, i-dispersants, kunye nezinye izongezo zinokuchaphazela i-viscosity kunye nokuzinza kwe-HEC-thickened formulation.
Iingcebiso ezisebenzayo zokuSebenzisa ngokuLungileyo
I-Pre-Dissolution: Ukuchithwa kwangaphambili kwe-HEC emanzini ngaphambi kokuyongeza kwi-formulation yepeyinti kunokunceda ukuqinisekisa ukusabalalisa okufanayo kunye nokuthintela ukuhlangana.
Ukongezwa okucothayo: Xa udibanisa i-HEC kuqulunqo, yenza oko ngokucothayo nangothuthuzeleko oluqhubekayo ukuthintela amaqhuma.
Ukuxutywa kwe-High-Shear: Sebenzisa i-mixers ye-shear ephezulu ukuba kunokwenzeka, njengoko inokunceda ukufezekisa umxube we-homogeneous kunye nokulawula okungcono kwe-viscosity.
Ukulungelelaniswa okuYandiswayo: Lungisa ugxininiso lwe-HEC ngokunyuka, ukuvavanya i-viscosity kunye neempawu zesicelo emva kokudibanisa nganye ukufezekisa ukuhambelana okufunayo.
Imiba eqhelekileyo kunye nokuJonga iNgxaki
I-Lumping: Ukuba i-HEC yongezwa ngokukhawuleza okanye ngaphandle kokuxuba ngokwaneleyo, inokwenza amaqhuma. Ukuthintela oku, ukusabalalisa i-HEC emanzini ngokuthe ngcembe ngelixa uvuselela ngamandla.
I-Viscosity engahambelaniyo: Ukwahluka kweqondo lokushisa, i-pH, kunye nesantya sokuxuba kunokukhokelela kwi-viscosity engahambelaniyo. Ukubeka iliso rhoqo kwaye ulungelelanise ezi parameters ukugcina ukufana.
I-Foaming: I-HEC inokwazisa umoya kwi-formulation, ekhokelela ekubeni igwebu. Sebenzisa i-defoams okanye i-anti-foaming agents ukunciphisa lo mba.
I-Hydroxyethyl cellulose licandelo elixabiseke kakhulu kwipeyinti kunye nemixube yokwaleka ngenxa yobuchule bayo bokuphucula i-viscosity, uzinzo, kunye neempawu zesicelo. Ngokuqonda iindlela ezifanelekileyo zokubandakanya i-HEC, ukulungelelanisa iiparitha zokuqulunqa, kunye nokucombulula iingxaki eziqhelekileyo, abavelisi banokudala umgangatho ophezulu, ohambelanayo, kunye neemveliso zepeyinti ezisebenzisekayo. Kungakhathaliseki ukuba ngokuxuba okomileyo okanye ukulungiswa kwesisombululo, isitshixo silele ekuxubeni okucokisekileyo, ukulungiswa kwe-pH, kunye nokulawula ukushisa ukuze kusetyenziswe ngokupheleleyo izibonelelo ze-HEC.
Ixesha lokuposa: May-28-2024