Kodi mungadziwe bwanji mtundu wa ufa wa polima wopangidwanso?

choyamba. Choyamba mvetsetsani chomwe chiriredispersible polima ufa.

Dispersible polima ufa ndi ma polima a ufa opangidwa kuchokera ku ma emulsion a polima kudzera mu njira yoyenera yowumitsa kutsitsi (ndi kusankha zowonjezera zoyenera). ufa wouma wa polima umasanduka emulsion ukakumana ndi madzi, ndipo ukhoza kuthanso madzi m'thupi panthawi ya coagulation ndi kuumitsa matope, kotero kuti tinthu tating'onoting'ono timapanga thupi la polima mumatope, lomwe ndi lofanana ndi ntchito ya matope. emulsion ya polima, yomwe imatha kusintha matope a simenti. zotsatira za kugonana. Emulsion youma ufa kusinthidwa matope amatchedwa youma ufa matope (amatchedwanso youma osakaniza matope, youma wosanganiza matope). Popeza ufa youma safuna kuganizira emulsion chiphunzitso ndi bata ngati polima emulsions, pang'ono admixture akhoza kupanga matope kukwaniritsa ankafuna katundu, ndipo ali ndi ubwino ma CD zosavuta, yosungirako, mayendedwe ndi kupereka kuposa emulsions, antifreeze ndi palibe. kukula kwa nkhungu, Vuto la mabakiteriya amoyo, ndi ubwino umene ukhoza kupangidwa kukhala chinthu chimodzi chopangidwa ndi okonzeka-kusakaniza ma CD monga simenti ndi mchenga, ndipo angagwiritsidwe ntchito pambuyo kuwonjezera madzi.

Mukamagwiritsa ntchito, sakanizani ndikunyamula mchenga, simenti, ufa wouma wa emulsion ndi zina zowonjezera pasadakhale, ndipo muyenera kuwonjezera madzi pang'ono panthawi yomanga kuti mupange matope owuma a ufa ndi ntchito yabwino. Pakatikati pa kupanga youma emulsion ufa ndi kuti polima particles pambuyo redispersion wa lalabala ufa kusonyeza tinthu kukula kapena tinthu kukula kubalalitsidwa ofanana ndi choyambirira emulsion polima particles. Kuchuluka kwa colloid zoteteza monga mowa wa polyvinyl kuyenera kuwonjezeredwa ku emulsion, kotero kuti ufa wa latex ukhoza kumwazidwanso mu emulsion pamene umagwirizana ndi madzi. Pokhapokha ndi dispersibility yabwino yomwe ufa wa latex ungakwaniritse bwino kwambiri. . The dispersible polima ufa nthawi zambiri woyera ufa. Zosakaniza zake ndi:

Utomoni wa polima: Umapezeka pakatikati pa tinthu tating'ono ta mphira, ndipo ndiyenso gawo lalikulu la ufa wa polima wopangidwanso.

Zowonjezera (zamkati): pamodzi ndi utomoni, zimagwira ntchito yosintha utomoni. Zowonjezera (zakunja): Zida zowonjezera zimawonjezedwa kuti zipititse patsogolo magwiridwe antchito a ufa wa polima wotayika.

Kuteteza colloid: wosanjikiza wa zinthu hydrophilic wokutidwa pamwamba redispersible latex ufa particles, zoteteza colloid ambiri redispersible latex ufa ndi polyvinyl mowa.

Anti-caking agent: Fine mineral filler, yomwe imagwiritsidwa ntchito makamaka kuletsa ufa wa rabara kuti usagwedezeke panthawi yosungira ndi kuyendetsa ndikuwongolera kutuluka kwa ufa wa rabara (wotayidwa m'matumba a mapepala kapena matanki.)

Kodi mungadziwe bwanji mtundu wa ufa wa latex wopangidwanso?

Njira 1, njira ya phulusa

Tengani ufa wina wopangidwanso ndi latex ufa, ikani mu chidebe chachitsulo mutatha kuyeza, tenthetsani mpaka madigiri pafupifupi 500, mutatha kutentha kutentha kwa madigiri 500, muziziziritsa kutentha, ndikulemeranso. Kulemera kopepuka komanso khalidwe labwino.

Njira 2, njira yothetsera

Tengani kuchuluka kwa redispersible latex ufa ndikusungunula mu 5 kuwirikiza kuchuluka kwa madzi, yambitsani bwino ndikuyimirira kwa mphindi zisanu musanawone. M'malo mwake, ma inclusions ochepa omwe amakhazikika pansi pamunsi, ndiye kuti mtundu wa ufa wa polima umakhala wabwinoko. Njirayi ndi yosavuta komanso yosavuta kuchita.

Njira yachitatu, njira yopangira mafilimu

Tengani mtundu wina wa ufa wonyezimira wa latex, usungunuke m'madzi nthawi ziwiri, sakanizani bwino, muyime kwa mphindi ziwiri, gwedezaninso, tsitsani yankho pagalasi loyera lathyathyathya, ndikuyika galasilo pamalo opumira mpweya. . Chotsani ukauma kwathunthu. Onani filimu yochotsedwa ya polima. Kuwonekera kwapamwamba komanso khalidwe labwino. Ndiye kukoka pang'ono, ndi elasticity wabwino ndi khalidwe labwino. Kanemayo adadulidwa mzidutswa, kumizidwa m'madzi, ndikuwona pambuyo pa tsiku la 1, mtundu wa filimuyo sunasungunuke m'madzi. Njirayi ndi yowonjezereka