Kunezici eziningi ezithinta ukusetshenziswa kwe-hydroxypropyl methylcellulose HPMC ezintweni zokwakha, ikakhulukazi i-plaster esekelwe ku-gypsum, kanje:
1 ukugcinwa kwamanzi
I-Hydroxypropyl methylcellulose yokwakha ivimbela ukumuncwa kwamanzi ngokweqile yi-substrate, futhi uma i-gypsum isibekwe ngokuphelele, amanzi kufanele agcinwe ku-plaster ngangokunokwenzeka. Lesi sici sibizwa ngokuthi ukugcinwa kwamanzi futhi silingana ngqo ne-viscosity yesisombululo se-hydroxypropyl methylcellulose esakhiweni esithile ku-stucco. Uma i-viscosity yesisombululo iphakeme, kulapho amandla aso okugcina amanzi aphezulu khona. Uma okuqukethwe kwamanzi sekukhuphukile, amandla okugcina amanzi azoncipha. Lokhu kungenxa yokuthi amanzi akhuphukile anciphisa isisombululo se-hydroxypropyl methylcellulose sokwakha, okuholela ekunciphiseni i-viscosity.
2 ukulwa nokuwa
I-plaster enezakhiwo ezingaboli ivumela ama-applicator ukuthi afake amajazi amakhulu ngaphandle kokugoba, futhi kusho ukuthi i-plaster ngokwayo ayi-thixotropic, ebingashelela phansi ngesikhathi sokufaka.
3 Yehlisa ukujiya, ukwakhiwa okulula
I-plaster ye-gypsum ene-viscosity ephansi futhi okulula ukuyikha ingatholakala ngokungeza imikhiqizo ehlukahlukene ye-hydroxypropyl methylcellulose eqondene nesakhiwo. Uma usebenzisa amazinga e-viscosity aphansi e-hydroxypropyl methylcellulose eqondene nesakhiwo, izinga le-viscosity liyancipha. Ukwakhiwa kuba lula, kodwa amandla okugcina amanzi e-hydroxypropyl methylcellulose ene-viscosity ephansi yokwakha abuthakathaka, futhi inani lokwengeza lidinga ukwanda.
4 Ukuhambisana kwe-stucco
Ukuze uthole inani elinqunyiwe lodaka olomile, kungcono kakhulu ukukhiqiza ivolumu ephezulu yodaka olumanzi, okungatholakala ngokungeza amabhamuza amanzi nomoya engeziwe. Kodwa inani lamabhamuza amanzi nomoya liningi kakhulu.
Isikhathi sokuthunyelwe: Ephreli-20-2023