Kwishishini lepeyinti, ukuzinza kunye ne-rheology ye-paste yombala ibalulekile. Nangona kunjalo, ngexesha lokugcinwa kunye nokusetyenziswa, ukunamathiswa kombala kudla ngokuba neengxaki ezifana nokuqina kunye ne-agglomeration, echaphazela umphumo wokwakha kunye nomgangatho wokwambathisa.Iselulosi yeHydroxyethyl (HEC), njenge-polymer thickener e-soluble yamanzi eqhelekileyo, idlala indima ebalulekileyo ekuqulunqweni kwepeyinti. Inokuphucula ngokufanelekileyo iimpawu ze-rheological zokunamathisela umbala, ukukhusela i-agglomeration, kunye nokuphucula ukuzinza kokugcina.
1. Izizathu zokujiya kunye ne-agglomeration yepeyinti yombala wepeyinti
Ukuqina kunye nokudityaniswa kombala wepeyinti yepeyinti ihlala ihambelana nezi zinto zilandelayo:
Ukusasazeka kwe-pigment engazinzanga: Amasuntswana e-pigment kwi-paste yombala angadada kwaye azinze ngexesha lokugcinwa, okukhokelela ekugxininiseni okugqithisileyo kwendawo kunye ne-agglomeration.
Ukuguquka kwamanzi kwinkqubo: Ngexesha lokugcinwa, ukuphuphuma kwenxalenye yamanzi kuya kubangela ukuba i-viscosity ye-paste yombala ikhule, kwaye ide yenze into eyomileyo phezu komhlaba.
Ukungahambelani phakathi kwezongezo: I-thickeners ethile, i-dispersants okanye ezinye izongezo zinokusabela omnye komnye, ezichaphazela iipropathi zerheological zokuncamathisela kombala, okukhokelela ekunyuseni kwe-viscosity engaqhelekanga okanye ukwakheka kwe-flocculent.
Isiphumo samandla okucheba: Ixesha elide lokuvuselela oomatshini okanye ukumpompa kunokubangela ukutshatyalaliswa kwesakhiwo se-polymer chain kwisistim, kuncitshiswe ubumanzi bokuncamathisela kombala, kwaye kwenze kube yi-viscous okanye i-agglomerated.
2. Inkqubo yesenzo se-hydroxyethyl cellulose
I-Hydroxyethyl cellulose (HEC) yi-non-ionic cellulose derivative kunye nokutyeba okulungileyo, isakhono sokulungelelaniswa kwe-rheological kunye nokuzinza kwe-dispersion. Indlela yayo ephambili yokwenza kwipeyinti yokuncamathisela yombala ibandakanya:
Ukuqina kunye nohlengahlengiso lwe-rheological: I-HEC inokudibanisa kunye neemolekyuli zamanzi ngokusebenzisa i-hydrogen bonding ukwenza umaleko ozinzileyo we-hydration, ukwandisa i-viscosity yenkqubo, ukuthintela amasuntswana e-pigment ukusuka kwi-agglomerating kunye nokuhlalisa, kwaye uqinisekise ukuba intlama yombala igcina i-fluidity elungileyo ngexesha lokuma okanye ukwakhiwa.
Inkqubo yokusabalalisa okuzinzile: I-HEC inomsebenzi omhle womphezulu, inokugqoka amasuntswana e-pigment, iphucule i-dispersibility yabo kwisigaba samanzi, ithintele i-agglomeration phakathi kwamasuntswana, kwaye ngaloo ndlela inciphisa i-flocculation kunye ne-agglomeration.
I-Anti-water evaporation: I-HEC inokwenza umaleko othile okhuselayo, icothise isantya sokumka kwamanzi, ithintele intlama yombala ukuba ingaqini ngenxa yokulahleka kwamanzi, kwaye yandise ixesha lokugcina.
Ukuxhathisa kwe-Shear: I-HEC inika ipeyinti i-thixotropy elungileyo, inciphisa i-viscosity phantsi kwamandla aphezulu okucheba, iququzelele ukwakhiwa, kwaye inokubuyisela ngokukhawuleza i-viscosity phantsi kwe-low shear force, iphucula ukusebenza kwepeyinti yokuchasa ukuguqa.
3. Izinto eziluncedo ze-hydroxyethyl cellulose kwipeyinti yombala wepeyinti
Ukongeza i-hydroxyethyl cellulose kwinkqubo yokuncamathisela umbala wepeyinti inezi nzuzo zilandelayo:
Ukuphucula ukuzinza kokugcinwa kombala wombala: I-HEC inokuthintela ngokufanelekileyo i-pigment sedimentation kunye ne-agglomeration, iqinisekisa ukuba umbala we-paste ugcina umbane ofanayo emva kokugcinwa kwexesha elide.
Ukuphucula ukusebenza kolwakhiwo: I-HEC inika umbala wokuncamathisela iipropati ezibalaseleyo ze-rheological, okwenza kube lula ukuxubha, ukuqengqeleka okanye ukutshiza ngexesha lokwakha, ukuphucula ukulungelelaniswa kokwakhiwa kwepeyinti.
Ukuphucula ukuxhathisa kwamanzi: I-HEC inokunciphisa utshintsho lwe-viscosity olubangelwa ukuguquka kwamanzi, ukwenzela ukuba umbala wokunamathisela unokugcina uzinzo oluhle phantsi kweemeko ezahlukeneyo zokusingqongileyo.
Ukuhambelana okuqinileyo: I-HEC i-thickener engekho i-ionic, ehambelana kakuhle kunye ne-dispersants ezininzi, ii-agent ezimanzi kunye nezinye izongezo, kwaye aziyi kubangela ukungazinzi kwinkqubo yokuqulunqa.
Ukukhuselwa kokusingqongileyo kunye nokhuseleko: I-HEC iphuma kwi-cellulose yendalo, ihlangabezana neemfuno zokukhuselwa kwendalo, ayikhuphi izinto ezinobungozi, kwaye ihambelana nendlela yokuphuhliswa kohlaza kunye nokusingqongileyo kokwaleka kwamanzi.
4. Ukusetyenziswa kunye neengcebiso ze-hydroxyethyl cellulose
Ukuze udlale kakuhle indima ye-HEC, la manqaku alandelayo kufuneka aqatshelwe xa uyisebenzisa kwifomula yokuncamathisela yombala:
Ukulawulwa okunengqiqo kwenani lokongezwa: Isixa se-HEC sihlala siphakathi kwe-0.2% -1.0%. Umthamo othile wokusetyenziswa kufuneka ulungelelaniswe ngokweemfuno zenkqubo yokugubungela ukuphepha i-viscosity egqithisileyo kunye nokuchaphazela umsebenzi wokwakha.
Inkqubo yokuchithwa kwangaphambili: I-HEC kufuneka ihlakazeke kwaye ichithwe emanzini kuqala, ize yongezwe kwindlela yokunamathisela umbala emva kokwenza isisombululo esifanayo sokuqinisekisa ukuba sisebenzisa ngokupheleleyo imiphumo yayo yokuqina kunye nokusabalalisa.
Sebenzisa kunye nezinye izongezo: Inokuthi ifaniswe ngokufanelekileyo kunye ne-dispersants, ii-agent zokumanzisa, njl.
Gwema iziphumo eziphezulu zokushisa: I-solubility ye-HEC ichaphazeleka kakhulu ngubushushu. Kucetyiswa ukuba inyibilikiswe kubushushu obufanelekileyo (25-50℃) ukunqanda ukudityaniswa okanye ukunyibilika okunganelanga.
Iselulosi yeHydroxyethylinexabiso lesicelo esibalulekileyo kwinkqubo yokuncamathisela umbala wepeyinti. Inokusombulula ngempumelelo iingxaki zokuncamathisela kombala kunye ne-agglomeration, kwaye iphucule uzinzo lokugcina kunye nokusebenza kolwakhiwo. Ukutyeba kwayo, ukuzinza kwe-dispersion kunye nokuchasana nokunyuka kwamanzi okuba ngumphunga kuyenza ibe yinto ebalulekileyo yokudibanisa iipeyinti ezisekelwe emanzini. Kwizicelo ezisebenzayo, uhlengahlengiso olufanelekileyo lwedosi ye-HEC kunye nendlela yokongeza inokwandisa izibonelelo zayo kwaye iphucule umgangatho uwonke wepeyinti. Ngokuphuhliswa kweepeyinti ezisekelwe emanzini ezihambelana nokusingqongileyo, amathuba okusetyenziswa kwe-HEC aya kuba banzi.
Ixesha lokuposa: Apr-09-2025