I-Redispersible powder VAE
Iimveliso zomgubo wepolymer eziphinde zihlakazwe ziyinto entsha ebalulekileyo kwindawo yolwakhiwo kunye nezicelo zemizi-mveliso, ezinikezela ngezisombululo eziguquguqukayo ngenxa yeempawu zazo ezizodwa kunye nobuchule. Ezi powders ubukhulu becala zinyibilika emanzini kwaye zinokuhlelwa ngokweendidi ezahlukeneyo ngokuxhomekeke kwimichiza yazo, kubandakanywa i-ethylene/vinyl acetate copolymers, i-vinyl acetate/ethylene terephthalate copolymers, kunye ne-acrylic acid copolymers. Uhlobo ngalunye lwe-copolymer lubonelela ngeempawu ezahlukileyo ezijongene noluhlu lokusetyenziswa kumashishini ahlukeneyo, ukusuka kwi-adhesives ukuya kwi-copolymers, ngokwandisa amandla okusetyenziswa kwizinto ezahlukeneyo zokwakha. Oku kuguquguquka kubalulekile ekuhlangabezaneni neemfuno ezikhulayo zemathiriyeli ephucukileyo eququzelela ukuphuculwa komsebenzi kunye nokuqina kwiimveliso zemihla ngemihla.
Inkqubo yokuvelisa i-polymer powders ephinda i-dispersible iquka iindlela zokutshiza zokutshiza, ezikhokelela ekubunjweni kweengqungquthela zomgubo ocolekileyo ezilungele ukuphathwa kunye nokusebenza. Okubalulekileyo, ezi powders zikhuselwe nge-polyvinyl alcohol ngexesha lemveliso, ziqinisekisa ukuba zigcina ingqibelelo yazo de zilungele ukusasazwa kwakhona. Xa ezi powders ziphinde zihlakazwe kwakhona zidibana namanzi, zibonisa isakhono esikhethekileyo sokubuyela ngokukhawuleza kwimeko yolwelo, evumela ukuba kube lula ukusetyenziswa kwizicelo ezahlukeneyo. Olu phawu luxabiseke ngakumbi kwiindawo apho ukusebenza kakuhle kwexesha kubalulekile, njengoko kuvumela iikontraka kunye neengcali zeshishini ukuba zisebenze ngaphandle komthungo ngemathiriyeli ngaphandle kwexesha elide lokulinda lokuxuba okanye ukuqaliswa.
Usetyenziso olubanzi lweepolymer powders eziphinde zihlakazwe ziphinde zomelezwe ngeempawu zabo zokusebenza eziphezulu. Umthamo wabo ophezulu wokubambelela ubenza ukuba balungele ukusetyenziswa kwi-adhesives yokwakha, i-adhesives ye-tile, kunye nee-agents ezahlukeneyo zokudibanisa, ukubonelela ngokudibanisa okunamandla, okuthembekileyo kwizinto zokwakha. Ukongeza, ukuxhathisa okungokwemvelo kwamanzi kwezi powders zepolymer kunika ukhuseleko ekungeneni kokufuma, okuyimfuneko ekugcineni ubomi obude kunye nokuqina kwezakhiwo. Iimpawu zokufakelwa kwe-thermal nazo zinegalelo ekusebenzeni kwamandla kwizakhiwo, okwenza kube yinto ethandwayo phakathi kwabakhi bezakhiwo kunye neenjineli ezijolise kwizisombululo zoyilo oluzinzileyo. Njengoko imizi-mveliso iqhubeka nokukhangela izinto ezintsha zokuphucula umgangatho wemveliso kunye nokusebenza, indima yomgubo wepolymer osasazeke kwakhona iya kukhula icace ngakumbi, iqaqambisa ukubaluleka kwayo kuzo zombini izicelo zangoku nezexesha elizayo.
