Ulwazi oluyisisekelo lwe-polymer powder ehlakazekayo

1. umqondo oyisisekelo

I-polymer powder ehlakazeka kabushaiyisengezo esiyinhloko sempushana eyomile exutshwe ngodaka njengosimende noma i-gypsum-based.

I-latex powder ehlakazeka kabusha iyi-emulsion ye-polymer eyomiswa futhi ihlanganiswe kusukela ku-2um yokuqala ukuze yakhe izinhlayiya eziyindilinga ezingama-80 ~ 120um. Ngenxa yokuthi izindawo ezingaphezulu zezinhlayiya zimbozwe ngempushana engaphili, ekwazi ukumelana nesakhiwo esiqinile, sithola izimpushana ze-polymer ezomile. Kulula kakhulu ukuwathulula kanye nesikhwama sokugcinwa ezindaweni zokugcina impahla. Uma impushana ixutshwa namanzi, usimende noma udaka olusekelwe ku-gypsum, ingaphinde ihlakazwe, futhi izinhlayiya eziyisisekelo (2um) kuyo zizophinde zakheke zibe yisimo esilingana ne-latex yasekuqaleni, ngakho-ke ibizwa ngokuthi i-latex powder ephindwe kabusha.

Ine-redispersibility enhle, iphinde ihlakazeke ibe yi-emulsion lapho ithintana namanzi, futhi inezindawo zamakhemikhali ezifanayo ncamashi ne-emulsion yasekuqaleni. Ngokungeza impushana ye-polymer ehlakazekayo kusimende-based noma i-gypsum-based dry powder exutshwe ngodaka, izakhiwo ezihlukahlukene zodaka zingathuthukiswa, njenge:

Thuthukisa ukunamathela nokuhlangana kodaka;

Yehlisa ukumuncwa kwamanzi kwento kanye ne-elastic modulus yezinto;

Amandla e-Flexural, ukumelana nomthelela, ukumelana nemihuzuko nokuqina kwezinto zokuqinisa;

Thuthukisa ukusebenza kokwakhiwa kwezinto, njll.

2. Izinhlobo zezimpushana ze-polymer ezihlakazekayo

Njengamanje, izinhlelo zokusebenza eziyinhloko emakethe zingahlukaniswa zibe yi-disperse latex:

I-Vinyl acetate ne-ethylene copolymer rubber powder (Vac/E), i-ethylene ne-vinyl chloride ne-vinyl laurate ternary copolymer rubber powder (E/Vc/VL), i-vinyl acetate ne-ethylene kanye ne-fatty acid ephakeme i-vinyl ester terpolymerization Rubber powder (Vac/E/ I-VeoVa), i-vinyl acetate ne-fatty acid ephakeme i-vinyl ester copolymer rubber powder (Vac/VeoVa), i-acrylate ne-styrene copolymer rubber powder (A/S), i-vinyl acetate ne-acrylate kanye ne-fatty acid ephakeme I-Vinyl ester terpolymer rubber powder (Vac/A/ I-VeoVa), i-vinyl acetate homopolymer rubber powder (PVac), i-styrene ne-butadiene copolymer rubber powder (SBR), njll.

3. Ukwakheka kwe-polymer powder ehlakazekayo

Izimpushana ze-polymer ezihlakazekayo ngokuvamile ziyizimpushana ezimhlophe, kodwa ezimbalwa zineminye imibala. Izithako zayo zihlanganisa:

I-polymer resin: Itholakala engxenyeni ewumgogodla wezinhlayiya ze-polymer powder, futhi iyingxenye eyinhloko yempushana ye-polymer ehlakazeka kabusha.

Okungeziwe (kwangaphakathi): kanye ne-resin, idlala indima yokuguqula i-resin.

Izithasiselo (zangaphandle): Izinto ezengeziwe zengezwa ukuze kuqhutshekwe nokwandisa ukusebenza kwempushana ye-polymer ehlakazekayo.

I-protective colloid: ungqimba lwe-hydrophilic material esongwe phezu kwezinhlayiya ze-latex powder ezihlakazeka kabusha, i-colloid evikelayo yempushana ye-latex ehlakazeka kakhulu i-polyvinyl alcohol.

I-Anti-caking ejenti: i-fine mineral filler, esetshenziselwa ikakhulukazi ukuvimbela impushana yerabha ekugwemeni ngesikhathi sokugcinwa nokuthutha kanye nokwenza lula ukugeleza kwempushana yerabha (ukulahlwa ezikhwameni zephepha noma amathangi).

4. Indima yempushana ye-polymer ehlakazekayo odakeni

I-latex powder ehlakazeka kabusha ihlakazeka ibe yifilimu futhi isebenza njenge-ejenti yokuqinisa njenge-adhesive yesibili;

I-colloid evikelayo imuncwa uhlelo lodaka (ngeke lubhujiswe ngamanzi ngemva kokwakhiwa kwefilimu, noma "ukuhlakazeka kwesibili";

I-resin ye-polymer eyenza ifilimu isakazwa kulo lonke uhlelo lodaka njengento yokuqinisa, ngaleyo ndlela ikhulise ukuhlangana kodaka;

5. Indima yempushana ye-polymer ehlakazeka odakeni olumanzi:

Thuthukisa ukusebenza kokwakhiwa;

Thuthukisa izakhiwo zokugeleza;

Ukwandisa ukumelana ne-thixotropy kanye ne-sag;

thuthukisa ukuhlangana;