Iimveliso ze-cellulose zithathwe kwi-pulp ye-cotton yendalo okanye i-pulp yokhuni nge-etherification.Iimveliso ezahlukeneyo zeselulosi zisebenzisa i-etherifying agents ezahlukeneyo.I-Hypromellose HPMC isebenzisa ezinye iintlobo ze-etherifying agents (i-chloroform kunye ne-1,2-epoxypropane) , ngelixa i-hydroxyethyl cellulose HEC isebenzisa i-Oxirane etherifying agents.Iselulosi yeHydroxyethyl inokusetyenziselwa ukujiya kwipeyinti yamatye yokwenyani kunye nepeyinti yelatex.Ngenxa yesixa esikhulu se-aggregate, ubunzima obuthile, imvula, idinga ukongeza i-agent yokutyebisa ukunyusa i-viscosity yayo, ukuze ihlangabezane neemfuno ze-viscosity yokwakha yokutshiza, kunye nokuphucula ukuzinza kwayo yokugcina, kunye nokufezekisa amandla athile.Ukufezekisa amandla alungileyo, ukuchasana kwamanzi okulungileyo kunye nokuchasana kwemozulu, ukukhethwa kwezinto eziluhlaza kunye noyilo loyilo kubaluleke kakhulu.
Ngokubanzi, ubungakanani be-emulsion yepeyinti yamatye esemgangathweni ophezulu iya kuba phezulu.Ngokomzekelo, itoni yepeyinti yamatye yangempela ingaba ne-300 kg ye-emulsion ecocekileyo ye-acrylic kunye ne-650 kg yesihlabathi samatye endalo.Xa umxholo oqinileyo we-emulsion ngu-50% , umthamo we-emulsion ye-300 kg emva kokumisa malunga ne-150 ilitha, i-650 Kg yesihlabathi malunga ne-228 ilitha.Oko kukuthi, ngeli xesha i-PVC (i-pigment volume concentration) yepeyinti yamatye yangempela yi-60% , kuba iinqununu zesanti ezinemibala zikhulu kwaye zingaqhelekanga kwimilo, phantsi kwemeko yokusabalalisa ubungakanani besuntswana elithile, emva kokumisa. ipeyinti yamatye yangempela ingaba kwi-CPVC (i-pigment ebaluleke kakhulu yoxinaniso lwevolumu) malunga.Kwi-thickener, ukuba i-viscosity efanelekileyo ye-cellulose ikhethiwe, ifilimu egcweleyo kunye neshinyeneyo inokuqulunqwa ukuhlangabezana neemfuno ezintathu eziphambili zepeyinti yamatye yokwenyani.Ukuba umxholo we-emulsion uphantsi, kucetyiswa ukuba kusetyenziswe i-viscosity ephezulu ye-cellulose njenge-thickener (umzekelo, i-100,000 viscosity) , ngakumbi emva kokunyuka kwexabiso le-cellulose, elinokunciphisa inani le-cellulose esetyenzisiweyo, nayo inokuvumela ukusebenza. yepeyinti yamatye yokwenene ngaphezulu.Abanye abavelisi bepeyinti yamatye enexabiso eliphantsi bathathe indawo ye-hydroxyethyl cellulose nge-hypromellose ngenxa yeendleko kunye nezinye izinto eziqwalaselwayo.Xa kuthelekiswa neentlobo ezimbini zeselulosi, i-hydroxyethyl cellulose inomthamo ongcono wokubamba amanzi, ayilahlekelwa amandla okubamba amanzi ngenxa yejeli kwiqondo lokushisa eliphezulu, kwaye inokumelana nokubola okuthile.Ngenxa yokusebenza, kuyacetyiswa ukuba usebenzise i-100,000 viscosity hydroxyethyl cellulose njenge-thickener yepeyinti yamatye yokwenyani.
Ixesha lokuposa: Jul-24-2023