Umgubo wepolymer dispersible kunye nezinye izibophelelo ezingaphiliyo (ezifana nesamente, slaked lime, gypsum, njl.) kunye aggregates ezahlukeneyo, fillers kunye nezinye izongezo (ezifana methyl hydroxypropyl cellulose ether, starch ether, lignocellulose, Agents hydrophobic, njl. Xa udaka oluxubekileyo luxutywe ngamanzi, phantsi kwesenzo se-hydrophilic protective colloid kunye ne-mechanical shearing, i-latex powder particles iya kusasazeka emanzini.
Ngenxa yeempawu ezahlukeneyo kunye nokuguqulwa kwepowder ye-latex nganye eyahlulahlulwe, esi siphumo sikwahluke, ezinye zinefuthe lokukhuthaza ukuhamba, ngelixa ezinye zinefuthe lokunyusa i-thixotropy. Indlela yempembelelo yayo ivela kwiinkalo ezininzi, kubandakanywa nempembelelo ye-latex powder kwi-affinity yamanzi ngexesha lokusabalalisa, impembelelo ye-viscosity eyahlukileyo ye-latex powder emva kokusabalalisa, impembelelo ye-colloid ekhuselayo, kunye nefuthe le-samente kunye nebhanti yamanzi. Impembelelo yale miba ilandelayo ibandakanya impembelelo ekwandeni komxholo womoya wodaka kunye nokusabalalisa amaqamza omoya, kunye nefuthe lezongezo zalo kunye nokusebenzisana nezinye izongezo. Ke ngoko, ukhetho olulungelelanisiweyo kunye nolwahlulo lwepolymer ephinda iphindwe kabini yindlela ebalulekileyo yokuchaphazela umgangatho wemveliso. Phakathi kwazo, eyona mbono ixhaphakileyo kukuba umgubo wepolymer odispersible udla ngokunyusa umxholo womoya wodaka, ngaloo ndlela uthambisa ukwakhiwa kodaka, kunye nokudibana kunye ne-viscosity yepolymer powder, ngakumbi xa i-colloid ekhuselayo isasazeka, emanzini. Ukunyuka kwe-α kuncedisa ekuphuculeni ukuhambelana kodaka lokwakha, ngaloo ndlela kuphuculwe ukusebenza kodaka. Emva koko, udaka olumanzi oluqulethe i-latex powder dispersion lusetyenziswa kwindawo yokusebenza. Ngokuncipha kokufuma kumanqanaba amathathu - ukufunxwa komgangatho wesiseko, ukusetyenziswa kwe-cement hydration reaction, kunye ne-volatilization yokufuma komhlaba emoyeni, amasuntswana e-resin ngokuthe ngcembe asondela kwi-, i-interface idibanisa ngokuthe ngcembe enye kwenye, kwaye ekugqibeleni ibe yifilimu ye-polymer eqhubekayo. Le nkqubo iyenzeka ikakhulu kwimibhobho yodaka kunye nomphezulu wokuqina.
Kufuneka kugxininiswe ukuba, ukwenzela ukuba le nkqubo ihlaziywe, oko kukuthi, xa ifilimu ye-polymer ingachithwanga kwakhona xa idibana namanzi kwakhona, i-colloid ekhuselekileyo ye-polymer powder kufuneka ihlulwe kwi-polymer film system. Oku akuyona ingxaki kwi-alkaline sement mortar system, kuba iya kuba yi-saponified yi-alkali eyenziwa yi-hydration ye-samente, kwaye ngexesha elifanayo, i-adsorption yezinto ze-quartz iya kuhlukanisa ngokuthe ngcembe kwinkqubo ngaphandle kokukhusela i-hydrophilic. I-Colloid, ifilimu enganyibilikiyo emanzini kwaye yenziwe yi-dispersible ye-latex powder ngexesha elinye, ayikwazi ukusebenza kuphela phantsi kweemeko ezomileyo, kodwa phantsi kweemeko zokucwiliswa kwexesha elide emanzini. Kwiinkqubo ezingezizo zealkali, ezifana neenkqubo zegypsum okanye iinkqubo ezinezahlulo kuphela, iicolloids ezikhuselayo zisekho ngokuyinxenye kwifilimu yepolymer ngesizathu esithile, ezichaphazela ukuxhathisa kwamanzi kwifilimu, kodwa ekubeni ezi nkqubo zingasetyenziswanga Kwimeko yokuntywiliselwa ixesha elide emanzini, kwaye i-polymer isenayo impawu zayo ezizodwa, ayichaphazeli ukusetyenziswa kwezi nkqubo zepolymer ezihlakazekayo.
Ixesha lokuposa: Apr-25-2024