I-distrible polymer powder nezinye izinamathiseli ze-inorganic (ezinjengesimende, i-lime evuthayo, i-gypsum, ubumba, njll.) Futhi ama-pleyackaride (ama-starckaride (isitashi, i-starch ether), kuxutshwe nokwenza udaka olomile. Lapho kufakwa i-powder eyomile emanzini futhi ivuswe, ngaphansi kwesenzo se-colroud prolrophilic prolloid kanye ne-mehendi, izinhlayiya ze-latex ze-towx zingasatshalaliswa emanzini, kwanele ukwenza i-latex ye-latex ye-latex ngokugcwele. Ukwakheka kwe-ruble powder kuhlukile, okunomthelela kwi-Rheelogy yodaka kanye nezakhiwo ezahlukahlukene zokwakha: ubudlelwane be-latex bustraw forw amanzi uma kuvuselelwa kabusha, umphumela we- Okuqukethwe komoya kodaka kanye nokusatshalaliswa kwama-bubble, ukuxhumana phakathi kwe-awder yenjoloba nezinye izithasiselo zenza imisebenzi ehlukene ye-latex inemisebenzi yokwanda kwe-fluodity, okwandayo i-thixotropy, nokukhulisa ukubonana.
Ngokuvamile kuzwakala ukuthi indlela evuselelayo ye-latex powder ithuthukisa ukusebenziseka kodaka olusha ukuthi i-tolch ye-latex, ikakhulukazi i-colloid ye-latex, inenhloso yamanzi lapho ibonakala khona lapho i-slurry futhi ithuthukisa ukubumbana kwe udaka lokwakha.
Ngemuva kokuthi udaka olusha oluqukethe i-latex powder dissaverity yakheka, ngokumuncwa kwamanzi ngobuso besisekelo, ukusetshenziswa kwe-hydration reaction, kanye nokuzithathela kancane kancane, inkiyane yezinhlayiya kancane kancane, kancane kancane izinhlayiya , futhi i-resin kancane kancane idonsela omunye komunye. ekugcineni u-polymerized ungene kwifilimu. Inqubo yokuhlelwa kwefilimu ye-polymer ihlukaniswe izigaba ezintathu. Esigabeni sokuqala, izinhlayiya ze-polymer zihamba ngokukhululeka ngesimo sokunyakaza kwe-browrowian emulsion yokuqala. Njengoba amanzi ehwamuka, ukunyakaza kwezinhlayiya ngokwemvelo ngokwengeziwe futhi kukhawulelwe ngokwengeziwe, kanye nokungezwani kwezingcweti phakathi kwamanzi futhi umoya ubangela ukuba bavumelane kancane kancane. Esigabeni sesibili, lapho izinhlayiya ziqala ukuxhumana nazo, amanzi kunethiwekhi avele aqhamuke ngokusebenzisa i-capillary, kanti ukungezwani okuphezulu kwe-capillary kusetshenziswe ebusweni bezinhlayiya kubangela ukuba izinhlayiya zibangela ukuba zibe nzima, futhi Amanzi asele agcwalisa ama-pores, futhi ifilimu lakhiwa. Isiteji sesithathu nesokugcina sinika amandla amandla (kwesinye isikhathi abizwa nge-self-adhesion) ama-polymer molecule ukwakha ifilimu eqhubekayo ngempela. Ngesikhathi sokwakhiwa kwefilimu, izinhlayiya ze-latex ze-leatex eziqhelile zehlukanisa esigabeni esisha sefilimu esisha ngengcindezi ephezulu. Ngokusobala, ukuze i-polymer powder ehlakazekile ukuze ikwazi ukwakha ifilimu olimini oluvuselelayo, amazinga okushisa aphansi wefilimu (i-MFT) kumele aqinisekiswe ukuthi angaphansi kokushisa kodaka.
Ama-colloids - i-polyvinyl alcohol kumele ihlukaniswe ngohlelo lwe-polymer membrane. Lokhu akuyona inkinga ohlelweni luka-Alkaline Cement Jaumer, ngoba utshwala be-polyvinyl buzotholwa yi-alkali ekhiqizwe yi-yment hydration, futhi i-adsorption yezinto ezibonakalayo ze-quartz izohlukanisa kancane kancane i-polyvinyl alcohol kusuka ohlelweni, ngaphandle kwe-hydrophilic evikela i-colloid . , Ifilimu yakhiwa ngokuhlakazwa i-latex tablex evuselelayo, okuyi-insoluble emanzini, ayikwazi ukusebenza kuphela ezimeni ezomile, kodwa nasezimweni zokucwiliswa kwamanzi okude. Vele, ezinhlelweni ezingezona ze-alkaline, ezinjenge-gypsum noma amasistimu anabahlali kuphela, ngoba utshwala be-polyvinyl busaqhubeka bukhona kancane kwifilimu yamanzi, lapho lezi zinhlelo zingasetshenziswa ngamanzi wesikhathi eside Ukucwiliswa, futhi i-polymer isanezici zayo zoMshini, i-polymer powder ehlakazekile isengasetshenziswa kulezi zinhlelo.
Ngokwakheka kokugcina kwefilimu ye-polymer, kwakhiwa uhlelo lwe-Inorganic ne-Organic ngodaka lwelapha, okungukuthi, ithambo le-brittle kanye ne-hard akhiwe nge-hydraulic izinto, kanye ne-polymer powder eyenziwe ngegebe nangaphezulu. inethiwekhi eguquguqukayo. Amandla asheshayo kanye nokuhlangana kwefilimu ye-polymer resin eyakhiwe yi-latex powder iyathuthukiswa. Ngenxa yokuguquguquka kwe-polymer, umthamo wokukhubazeka uphakeme kakhulu kunesakhiwo esiqinile setshe likasimende, ukusebenza kodonga kwenziwa ngcono, futhi umphumela wokuxineka kwengcindezi ngcono kakhulu, ngaleyo ndlela uthuthukise ukumelana nodaka kodaka .
Ngokukhuphuka kokuqukethwe kwe-polymer powder ehlakazekile, uhlelo lonke lukhula lubheke epulasitiki. Endabeni yokuqukethwe okuphezulu kwe-latex powder, isigaba se-polymer ku-cuter dule kancane kancane sidlula isigaba somkhiqizo we-inorganic hydration, udaka uzoba yi-elastomer futhi abe ngummangali we-hydrome, futhi umkhiqizo we-hydration uzoba "umsizi we-hydration uzoba" umsizi we-hydration ". Amandla asheshayo, ukuqina, ukuguquguquka nezimo nezindawo zokubopha zodaka eziguqulwe nge-polymer powder ehlakazekile. Ukufakwa kwe-polymer powders ehlakazekile kuvumela ifilimu le-polymer (ifilimu laseTotex) ukwakha kanye nokwenza ingxenye yezindonga ze-pore, ngaleyo ndlela kuvale ukubekwa uphawu kwesakhiwo esikhulu sodaka. Ulwelwesi lwaseTatex lunendlela yokuzelula esebenza ukungezwani e-anchorage yayo ngodaka. Ngala mandla angaphakathi, udaka ugcinwe uwonke, ngaleyo ndlela wandisa amandla abumbene odaka. Ukuba khona kwama-polymers avumelana nezimo kakhulu futhi okuphezulu kakhulu kuthuthukisa ukuguquguquka nokuqina kodaka. Indlela yokwanda kokuxineka kwesivuno kanye nokusebenza kokwehluleka kungokulandelayo: Lapho kufakwa amandla, ama-microcacks ayatholakala ngenxa yokuthuthuka ngokuguquguquka ngokuguquguquka nokuqina, futhi akhiphe kuze kucindezelwe izingcindezi eziphakeme. Ngaphezu kwalokho, izizinda ze-polymer ziphinde zivikele ukuhlanganiswa kwama-microcracks kuma-macks. Ngakho-ke, i-polymer powder ehlakazekile inyusa ukucindezela nokwehluleka kwezinto ezibonakalayo.
Ifilimu le-polymer ku-polymer-modified ngodaka linomphumela obaluleke kakhulu ekuqiniseni kodaka. I-polymer popermer evuselelwayo esatshalaliswa esibonakalayo idlala enye indima ebalulekile ngemuva kokuhlakazeka futhi yakhiwa kwifilimu, okuwukukhulisa ukunamathela ezintweni zokwazisa. Ngokwemvelo yendawo ebonakalayo phakathi kwe-powder polymer-modified ceramic tile bonder usimende kanye ne-ceramic tile, ifilimu eyakhiwa yi-polymer yakha ibhuloho phakathi kwe-vitrified ceramic amuncy kanye ne-matrix kasimende ephansi. Indawo yokuxhumana phakathi kwezinto ezimbili ezingafani nengozi ekhethekile enkulu lapho ifomu lokuqhekeka oluncane futhi liholela ekulahlekelweni kokunamathela. Ngakho-ke, ikhono lamafilimu we-latex ukwelapha ama-shrinkage rackers adlala indima ebalulekile kuma-tile anamathela.
Ngasikhathi sinye, i-polymer powder ebonakalayo equkethe i-ethylene inama-adhesion agqamile kuma-organic substrates, ikakhulukazi izinto ezifanayo, njenge-polyvinyl chloride ne-polystyrene. Isibonelo esihle se
Isikhathi sePosi: Oct-31-2022