Isiphumo se-hydroxypropyl methylcellulose kudaka

Zininzi izinto ezichaphazela ukusetyenziswa kwe-hydroxypropyl methylcellulose HPMC kwizinto zokwakha, ngakumbi udaka olusekwe kwigypsum, ngolu hlobo lulandelayo:

1 ukugcinwa kwamanzi

I-Hydroxypropyl methylcellulose yokwakha ikhusela ukufunxa ngokugqithisileyo kwamanzi nge-substrate, kwaye xa i-gypsum ibekwe ngokupheleleyo, amanzi kufuneka agcinwe kwi-plaster kangangoko kunokwenzeka.Olu phawu lubizwa ngokuba ngukugcinwa kwamanzi kwaye luhambelana ngokuthe ngqo kwi-viscosity yesisombululo esikhethekileyo se-hydroxypropyl methylcellulose kwi-stucco.Ukuphakama kwe-viscosity yesisombululo, iphezulu amandla okugcina amanzi.Nje ukuba umthamo wamanzi unyuswe, umthamo wokugcina amanzi uya kuncipha.Oku kungenxa yokuba amanzi andayo anciphisa isisombululo se-hydroxypropyl methylcellulose yokwakha, okukhokelela ekunciphiseni kwe-viscosity.

2 anti-sagging

I-plaster ene-anti-sag properties ivumela abafaki-zicelo ukuba bafake iidyasi ezityebileyo ngaphandle kokugxwala, kwaye kuthetha ukuba udaka ngokwalo aluyiyo i-thixotropic, enokuthi ihlehle ngexesha lokufaka isicelo.

3 Ukunciphisa i-viscosity, ukwakhiwa okulula

I-Low-viscosity kunye ne-gypsum plaster ekulula ukuyakha inokufumaneka ngokongeza iimveliso ezahlukeneyo ze-hydroxypropyl methylcellulose kwisakhiwo.Xa usebenzisa amabakala asezantsi e-viscosity yesakhiwo esithile se-hydroxypropyl methylcellulose, iqondo le-viscosity liyancitshiswa ngokulinganayo Ukwakhiwa kuba lula, kodwa ukugcinwa kwamanzi kwi-low-viscosity hydroxypropyl methylcellulose yokwakhiwa kubuthathaka, kwaye inani elongezelelweyo lifuna ukwandiswa.

4 Ukuhambelana kwe-stucco

Ngomlinganiselo omiselweyo wodaka olomileyo, lunoqoqosho ngakumbi ukuvelisa umthamo ophezulu wodaka olumanzi, olunokufezekiswa ngokudibanisa amanzi amaninzi kunye namaqamza omoya.Kodwa ubungakanani bamanzi kunye namaqamza omoya kakhulu kakhulu