Imikhiqizo yamavithamini yonke itholakala ku-pulp yemvelo kakotini noma i-wood pulp, ekhiqizwa nge-etherification.Imikhiqizo ehlukene ye-cellulose isebenzisa ama-etherifying ahlukene.I-ejenti e-etherifying esetshenziswa ku-hydroxyethyl cellulose (HEC) i-ethylene oxide, futhi i-etherifying ejenti esetshenziswa ku-hydroxypropyl methylcellulose (HPMC) ezinye izinhlobo ze-etherifying ejenti.(i-chloromethane ne-propylene oxide).
Kupende wangempela we-szone kanye nopende we-latex, i-hydroxyethyl cellulose ingasetshenziswa njenge-thickener.
Upende wamatshe wangempela kulula ukukhuphuka ngenxa yesamba sawo esikhulu sokuhlanganisa nokucaciswa okukhulu.Kuyadingeka ukwengeza i-thickener ukwandisa i-viscosity yayo ukuze ihlangabezane ne-viscosity edingekayo yokufafaza ngesikhathi sokwakhiwa, ukuthuthukisa ukuqina kwayo kwesitoreji, futhi kufinyelele amandla athile.
Uma ufuna upende wangempela wamatshe ukuze uzuze amandla amahle, ukumelana kwamanzi okuhle nokumelana nesimo sezulu, ukukhethwa kwezinto ezisetshenziswayo kanye nomklamo wefomula kubaluleke kakhulu.
Ngaphansi kwezimo ezijwayelekile, inani le-emulsion elisetshenziselwa upende lwamatshe wekhwalithi eliphezulu lizoba phezulu kakhulu.
Isibonelo, ngethoni yopende wamatshe wangempela, kungase kube ne-300kg ye-emulsion ye-acrylic ehlanzekile kanye ne-650kg yesihlabathi samatshe esinemibala yemvelo.Lapho okuqukethwe okuqinile kwe-emulsion kungu-50%, ivolumu ye-emulsion engu-300kg ngemva kokumiswa ingaba amalitha angu-150, kanti umthamo we-650kg wesihlabathi ungama-228 amalitha.Okusho ukuthi, i-PVC (i-pigment volume concentration) yopende lwamatshe wangempela yi-60% ngalesi sikhathi, ngoba izinhlayiya zesihlabathi esinemibala zinkulu futhi azifani, futhi ngaphansi kwesimo sokusatshalaliswa kosayizi wezinhlayiyana ezithile, omisiwe. upende wamatshe wangempela ungase ube ku-CPVC (i-critical mass concentration).I-pigment volume concentration) cishe.Ngokuqondene ne-thickener, uma ukhetha i-cellulose nge-viscosity efanele, upende wetshe wangempela ungakha ifilimu kapende ecishe iphelele futhi eminyene ukuze ihlangabezane nezidingo ezintathu ezinkulu zokusebenza zopende wetshe wangempela.Uma okuqukethwe kwe-emulsion yopende lwamatshe wangempela kuphansi, kunconywa ukusebenzisa i-cellulose ene-viscosity ephakeme njenge-thickener (efana ne-viscosity eyi-100,000), ikakhulukazi ngemva kokunyuka kwentengo ye-cellulose, enganciphisa inani le-cellulose elisetshenzisiwe futhi wenze itshe langempela Ukusebenza kopende kungcono.
Abanye abakhiqizi bakapende betshe bangempela abanomnotho basebenzisa i-hydroxypropyl methylcellulose esikhundleni se-hydroxyethyl cellulose ngezindleko 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 nokukhunta okuthile.Ngokucatshangelwa kokusebenza, kunconywa ukusebenzisa i-hydroxyethyl cellulose ene-viscosity engu-100,000 njenge-thickener yopende wamatshe wangempela.
Isikhathi sokuthumela: Apr-28-2023