Ishishini lolwakhiwo lihlala livela kwaye izinto ezintsha kunye nobuchwepheshe ziyaphuhliswa ukwenza kube ngcono. Olunye ulutsha olunjalo kukusetyenziswa komgubo wepolymer ophinda wahlakazeka kwiimveliso zodaka lwepolymer. Iipolymer powders ezinokuphinda zisetyenziswe zisetyenziswa njengezibophelelo ekwenzeni ezi mveliso. Ingumgubo omhlophe ofunyenwe yi-emulsion polymerization ye-monomers. Emva koko i powder icutshungulwa ibe yipolymer enokuthi isasazwe ngokulula emanzini. Iipolymer powders eziphinda zihlakazwe zineepropathi ezahlukeneyo ezenza zibe zibophelelo ezifanelekileyo kwiimveliso zodaka lwepolymer. Kweli nqaku, siphonononga indima yomgubo wepolymer ehlakazekayo kwiimveliso zodaka lwepolymer kwaye kutheni ifuna ukuguquguquka okuphezulu.
Iipropathi ze-latex powder eziphinda zihlakazwe
I-polymer powders ephinda ihlakaniswe ineempawu ezininzi ezenza ukuba zilungele ukusetyenziswa kwiimveliso zodaka lwepolymer. Enye yeempawu eziphambili zeepowder kukukwazi kwabo ukuphucula ukunamathela kwemveliso kunye nokuguquguquka. Oku kungenxa yokuba umgubo wenziwa ngamasuntswana epolymer axhonywe emanzini. Xa i-powder ixutywe namanzi, yenza i-emulsion ezinzileyo enokuthi isetyenziswe ngokulula kwiindawo ze-substrate. Njengoko amanzi ephuphuma, amaqhekeza e-polymer adibanisa kunye ukuze enze ifilimu eqhubekayo edibanisa imveliso kwi-substrate.
Enye ipropathi yepolymer powders ehlakazekayo kukuxhathisa kwabo kwamanzi. Umgubo une-hydrophobic, oku kuthetha ukuba igxotha amanzi. Oku kwenza ukuba iimveliso zodaka lwepolymer zikwazi ukumelana namanzi, zithintele ukuba zingaqhekeki kwaye ziwohloke xa zidibana nokufuma. Le propati yenza ukuba iimveliso zomelele ngakumbi njengoko zikwazi ukumelana nokuvezwa ixesha elide emanzini.
I-latex powder ekwazi ukuphinda iphinde ibe neempawu ezintle zokuncamathelisa. Yenza ibhondi eqinile phakathi kodaka kunye ne-substrate, ukuphucula ukusebenza ngokubanzi kwemveliso. Le propati ibaluleke kakhulu kwiimveliso zodaka lwepolymer kwizicelo zangaphandle njengoko kufuneka zikwazi ukumelana neemeko zemozulu ezinzima.
Kutheni iimveliso zodaka lwepolymer zifuna ukuguquguquka okuphezulu
Iimveliso zodaka lwepolymer eziqulathe umgubo wepolymer odispersible zifuna ukuguquguquka okuphezulu njengoko zihlala zisetyenziswa kwizicelo zangaphandle ezivezwe kwiimeko ezahlukeneyo zokusingqongileyo. Ezi meko zinokubangela ukuba i-substrate yandise kwaye inkontileka, ibangele ukuchithwa kwemveliso kunye nokuwohloka. Ngoko ke, ukuguquguquka okuphezulu kuyadingeka ukuze kuqinisekiswe ukuba imveliso inokumelana nale mikhosi ngaphandle kokuqhekeka okanye ukuphuka.
Iimveliso zodaka lwepolymer eziqulethe umgubo wepolymer ezinokuphinda zisetyenziswe zikwasetyenziswa kwizicelo zangaphakathi ezivezwe kukungcangcazela kunye nokothuka. Kule meko, ukuguquguquka okuphezulu kuyafuneka ukuze kuqinisekiswe ukuba imveliso inokumelana nale mikhosi ngaphandle kokuqhekeka okanye ukuphazamiseka. Ukuguquguquka okuphezulu kwakhona kunegalelo ekusebenzeni ngokubanzi kwemveliso njengoko ivumela ukuba ihambelane ne-substrate kwaye igcine amandla ayo okubopha phantsi koxinzelelo.
I-latex powder ephinda idibaniswe yinxalenye ebalulekileyo kwimveliso yeemveliso zodaka lwepolymer. Iimpawu zayo ezahlukeneyo ziyenza ibe yinto efanelekileyo yokuncamathelisa ezi mveliso, njengoko iphucula iimpawu zabo zokubopha, inyusa ukuxhathisa kwamanzi, kwaye iphucula ukuqina kwayo yonke. Iimveliso zodaka lwepolymer eziqulathe umgubo wepolymer ophinda zikwazi ukusebenza kufuneka zibe nokuguquguquka okuphezulu, ngakumbi usetyenziso lwangaphandle oluvezwe kwiimeko ezahlukeneyo zokusingqongileyo kunye nezicelo zangaphakathi ezivezwe kukungcangcazela kunye nokothuka. Ngeenzuzo zabo ezininzi, iipolymer powders ezihlakazekayo zitshintsha ubuso beshishini lokwakha ngokuguqula indlela izinto zokwakha ezenziwe ngayo, ezikhokelela kwiimveliso ezisebenzayo kunye nezizinzileyo.
Ixesha lokuposa: Aug-15-2023