Imikhiqizo yamavithamini yonke itholakala ku-pulp yekotoni yemvelo noma ku-pulp yokhuni, ekhiqizwa nge-etherification. Imikhiqizo ehlukene ye-cellulose isebenzisa ama-etherifying agents ahlukene. I-etherifying agent esetshenziswa ku-hydroxyethyl cellulose (HEC) yi-ethylene oxide, kanti i-etherifying agent esetshenziswa ku-hydroxypropyl methylcellulose (HPMC) ingezinye izinhlobo zama-etherifying agents. (i-chloromethane kanye ne-propylene oxide).
Kupende we-szone wangempela kanye nopende we-latex, i-hydroxyethyl cellulose ingasetshenziswa njengesithako sokuqina.
Upende wamatshe wangempela kulula ukuwulungisa ngenxa yenani elikhulu lokuhlanganiswa kwawo kanye nokucaciswa okukhulu. Kuyadingeka ukwengeza i-thickener ukuze kwandiswe i-viscosity yayo ukuze kuhlangatshezwane ne-viscosity edingekayo yokufafaza ngesikhathi sokwakha, kuthuthukiswe ukuzinza kwayo endaweni yokugcina, futhi kufezwe amandla athile.
Uma ufuna upende wamatshe wangempela ufinyelele amandla amahle, ukumelana kahle namanzi kanye nokumelana nesimo sezulu, ukukhethwa kwezinto zokusetshenziswa kanye nomklamo wefomula kubaluleke kakhulu.
Ngaphansi kwezimo ezivamile, inani le-emulsion elisetshenziswa kupende wetshe wangempela wekhwalithi ephezulu lizoba phezulu kakhulu.
Isibonelo, kupende wetshe langempela eliyithani, kungaba khona ama-300kg e-emulsion emsulwa ye-acrylic kanye nama-650kg esihlabathi setshe esinombala wemvelo. Uma okuqukethwe okuqinile kwe-emulsion kungu-50%, umthamo wama-300kg e-emulsion ngemva kokomiswa ungamalitha angaba ngu-150, kanti umthamo wesihlabathi ongu-650kg ungamalitha angaba ngu-228. Okusho ukuthi, i-PVC (i-concentration yevolumu ye-pigment) yopende wetshe langempela ingu-60% ngalesi sikhathi, ngoba izinhlayiya zesihlabathi esinombala zinkulu futhi azifani ngesimo, futhi ngaphansi kwesimo sokusatshalaliswa kosayizi othile wezinhlayiya, upende wetshe langempela owomisiwe ungase ube ku-CPVC (i-concentration yesisindo esibucayi). I-concentration yevolumu ye-pigment) cishe. Ngokuphathelene ne-thickener, uma ukhetha i-cellulose ene-viscosity efanele, upende wetshe langempela ungakha ifilimu yopende ephelele neqinile ukuze kuhlangatshezwane nezidingo ezintathu ezinkulu zokusebenza kopende wetshe langempela. Uma okuqukethwe kwe-emulsion yopende wetshe langempela kuphansi, kunconywa ukusebenzisa i-cellulose ene-viscosity ephezulu njenge-thickener (njenge-viscosity engu-100,000), ikakhulukazi ngemva kokwenyuka kwentengo ye-cellulose, okunganciphisa inani le-cellulose esetshenziswayo futhi kwenze itshe langempela. Ukusebenza kopende kungcono.
Abanye abakhiqizi bopende bamatshe angempela abangabizi basebenzisa i-hydroxypropyl methylcellulose esikhundleni se-hydroxyethyl cellulose ngenxa yezindleko nezinye izici.
Uma kuqhathaniswa nezinhlobo ezimbili ze-cellulose, i-hydroxyethyl cellulose inokugcinwa kwamanzi okungcono, ngeke ilahlekelwe ukugcinwa kwamanzi ngenxa ye-gelatin ekushiseni okuphezulu, futhi inokumelana okuthile nokubola. Ukuze kucatshangelwe ukusebenza, kunconywa ukusebenzisa i-hydroxyethyl cellulose ene-viscosity engu-100,000 njengesithako sopende wamatshe wangempela.
Isikhathi sokuthunyelwe: Ephreli-28-2023