Njira yakumbuyo
Redividable mphira ufa ndi woyera olimba ufa wokonzedwa ndi kupopera mbewu mankhwalawa ndi kuyanika latex wapadera.Amagwiritsidwa ntchito kwambiri ngati chowonjezera chofunikira cha "matope osakaniza chikwi" ndi zowonjezera zina zowuma zopangira zida zomangira zakunja zamakhoma..Zomwe zimagwiritsidwa ntchito nthawi zambiri refractory latex powder ndi copolymer ya vinyl acetate, yomwe ndi ufa woyera womwe ukhoza kusuntha momasuka ndipo ukhoza kufalikira bwino m'madzi kuti upangitse emulsion yokhazikika ndi ntchito yofanana ndi ya latex yoyambirira.Monga chowonjezera chofunikira muzinthu zamatope owuma, ufa wopangidwanso wa latex umakhala ndi gawo lalikulu mumatope osakanizika a simenti.Ikhoza kupititsa patsogolo mphamvu ya mgwirizano ndi kugwirizana kwa zinthu.Kupititsa patsogolo zotanuka kupinda mphamvu ndi flexural mphamvu zakuthupi.Limbikitsani kukana kuzizira kwa zinthuzo.Kusintha nyengo kukana, durability, kuvala kukana zinthu.Sinthani hydrophobicity ya zinthu ndikuchepetsa kuyamwa kwamadzi.Kupititsa patsogolo ntchito ndikuchepetsa kuchepa kwa zinthu.Angathe kuteteza akulimbana.(I) Kupititsa patsogolo mgwirizano ndi mgwirizano
Muzinthu zouma za simenti, ndikofunikira kwambiri kuwonjezera ufa wa rabara wopangidwanso.Ndizodziwikiratu kupititsa patsogolo mphamvu zomangira ndi kugwirizana kwazinthuzo.Ichi ndi chifukwa cha malowedwe a polima particles mu pores ndi capillaries a masanjidwewo simenti, ndi zotsatira zabwino cohesive mphamvu pambuyo hydration ndi simenti.Chifukwa chomamatira bwino kwambiri utomoni wa polima wokha, ukhoza kupititsa patsogolo kumamatira kwa zinthu zamatope a simenti ku magawo, makamaka kumangiriza zomangira zakuthupi monga simenti ku magawo achilengedwe monga nkhuni, CHIKWANGWANI, PWC, ndi PS.Kuwongolera bwino kwa magwiridwe antchito kumakhala ndi zotsatira zoonekeratu.
Kumapindika bwino komanso kukana kolimba
Mu mafupa olimba omwe amapangidwa pambuyo pa matope a simenti ndi hydrated, filimu ya polima ndi yotanuka komanso yolimba, ndipo imakhala ngati mgwirizano wosunthika pakati pa matope a simenti, omwe amatha kupirira katundu wambiri wopindika ndikuchepetsa kupsinjika.Kupititsa patsogolo kukanika ndi kupindika
Limbikitsani kukana kwamphamvu
Redispersible latex ufa ndi thermoplastic resin.Kanema wofewa wokutidwa pamwamba pa matope tinthu amatha kuyamwa mphamvu yakunja ndikupumula popanda kusweka, potero kumathandizira kukana kwamatope.
Kupititsa patsogolo hydrophobicity ndikuchepetsa kuyamwa kwamadzi
Kuonjezera redispersible latex ufa kumatha kukonza microstructure ya matope a simenti.Polima yake imapanga maukonde osasinthika panthawi ya simenti ya hydration, imatseka capillary mu gel ya simenti, imatsekereza kuyamwa kwamadzi, imalepheretsa kulowa kwamadzi, ndikuwongolera kusakhazikika.
Limbikitsani kukana kuvala ndi kulimba
Kuwonjezera redispersible 휘 mphira ufa akhoza kuonjezera compactness pakati particles matope simenti ndi filimu polima.Kupititsa patsogolo mphamvu yolumikizana kumapangitsanso luso la matope kuti lipirire kupsinjika kwa kukameta ubweya, kumachepetsa mavalidwe, kumathandizira kukana kuvala, ndikutalikitsa moyo wautumiki wa matope.
Limbikitsani kukhazikika kwa kuzizira komanso kupewa kusweka kwa zinthu
Redispersible latex ufa, mphamvu ya pulasitiki ya utomoni wake wa thermoplastic imatha kuthana ndi kuwonongeka komwe kumachitika chifukwa chakukula kwamafuta ndi kutsika kwa zinthu zamatope za simenti chifukwa cha kusintha kwa kutentha.Kugonjetsa zofooka za matope osavuta a simenti, monga shrinkage yaikulu youma ndi kusweka kosavuta, kungapangitse kuti zinthuzo zikhale zosinthika, potero zimathandizira kukhazikika kwa nthawi yaitali.Komabe, pali mavuto mu kupanga ndondomeko ya redispersible latex ufa mu isanafike luso, chifukwa kuti particles lalabala si yunifolomu ndi zabwino mokwanira, ndi agglomeration sachedwa kuchitika pa kupanga, zoyendera ndi kusungirako.Potero zimakhudza mphamvu yake yogwiritsira ntchito.
Njira imeneyi akhoza anazindikira mwa njira zotsatirazi luso: kupanga ndondomeko redispersible mmbuyo-omwazika lalabala ufa, zinthu zotsatirazi amapangidwa malinga ndi Ufumuyo kulemera peresenti polima emulsion 72-85%;chitetezo colloid 4-9%;wotulutsa 11 -15%;zowonjezera zowonjezera 0-5%;opangidwa ndi ndondomeko yotsatirayi
a, kukonzekera colloid zoteteza: mu ketulo anachita, zoteteza colloid ufa wa batching kuchuluka si kusakanizidwa ndi madzi ndi kutenthedwa kuti modulated kukhala guluu, ndi defoamer anawonjezera, kutenthedwa ndi kukhala otentha kupanga mandala viscous zoteteza colloid. , kotero kuti mamasukidwe akayendedwe amafikira 2500as, olimba Zomwe zili mkati zimafika 19.5-20.5%.
b.Kukonzekera kubalalitsidwa: ikani okonzeka zoteteza colloid mu kukonzekera ketulo, ndiye kuwonjezera polima emulsion wa batching kuchuluka, kusakaniza wogawana, ndiye kuwonjezera defoamer ndi kuwonjezera madzi kusintha mamasukidwe akayendedwe 70-200Mas, ndi olimba zili kufika 39% - 42%, kutentha kwa 50-55 °
C, kugwiritsa ntchito;
C, kuyanika kwamtambo: tsegulani nsanja yowumitsira mtambo, pomwe kutentha kwa cholowera chakudyetsa pamwamba pa nsanja yowumitsa mtambo kumatenthedwa mpaka 140-150 ° C, kubalalitsidwa kokonzeka kumaperekedwa ku cholowera cha chakudya. pamwamba pa nsanja yowumitsira kutsitsi ndi pampu yowononga.Mu doko la chakudya, madzi amwazikana amasinthidwa kukhala madontho ang'onoang'ono okhala ndi madontho awiri a ma microns 10-100 kudzera pa diski yothamanga kwambiri ya centrifugal atomization padoko la chakudya.Panthawi imodzimodziyo, madontho ang'onoang'ono amawotchera mofulumira ndi mpweya wotentha kwambiri, ndipo panthawi imodzimodziyo, wothandizira omasulidwa amawonjezeredwa mumlengalenga wotentha kwambiri., pamene madontho ang'onoang'ono amatenthedwa kuti apange mamasukidwe akayendedwe, wothandizira amamasulidwa amatsatiridwa ndi madontho ang'onoang'ono mu nthawi, ndiyeno madzi a m'madontho ang'onoang'ono amasungunuka mofulumira kuti aume ndi mpweya wotentha kwambiri kuti apange mpweya- kusakaniza kolimba;
d, kuziziritsa ndi kupatukana: sungani kutentha kwa mpweya wotulutsa mpweya wa spray drying tower pa 79 ° C-81 ° C, ndipo kusakaniza kolimba kwa gasi kumatumizidwa kunja kuchokera kumalo opangira mpweya pansi pa nsanja yowumitsa. , kenako kutumizidwa mu thumba lalikulu fyuluta pambuyo kuzirala.Ufa womwe uli mu mpweya umalekanitsidwa ndipo ufa wolekanitsidwa umagawidwa ndi kusefa kuti upeze chotsirizidwa cha ufa wobalalikanso wa latex.Mawonekedwe Odziwika Onjezani madzi enaake oyera molingana ndi chowongolera choyera, kwezani kutentha mpaka pafupifupi 50 ° C, yatsani makina oyambitsa, onjezani ufa wa colloid woteteza molingana ndi 25% ya kuchuluka kwa madzi omwe awonjezeredwa pa riyakitala, ndi ndondomeko yowonjezera iyenera kukhala pang'onopang'ono Onjezani izo kuti muteteze ufa kuti usagwirizane m'madzi.Osawonjezera pa khoma lakumbali la riyakitala.Pambuyo powonjezerapo, onjezerani defoamer yofanana ndi 1% ya ndalama zonse.Ndi bwino kugwiritsa ntchito silicone-based defoamer.Phimbani dzenje lodyetserako ndikutentha mpaka pafupifupi 95 ° C.Insulated 1 ora, madzi mu riyakitala ndi kupangidwa mandala viscous guluu, popanda particles woyera, zitsanzo, kuyezetsa mamasukidwe akayendedwe ndi olimba zili, amafuna mamasukidwe akayendedwe kufika pafupifupi 2500as, ndi olimba zili kufika 19.5 ~ 20,5%.Onjezani colloid zoteteza ku ketulo yosakanikirana, kenaka yikani emulsion ya polima molingana, sakanizani colloid yoteteza ndi emulsion mofanana, ndikuwonjezera defoamer moyenera, yofanana ndi pafupifupi 0,1% ya ndalama zonse, ndipo defoamer iyenera kugwiritsidwa ntchito. nokha Emulsified silikoni mankhwala ophera tizilombo
The thovu wothandizira, ndi kuwonjezera madzi kusintha mamasukidwe akayendedwe 70-200pas, ndi olimba zili 39% -42%.Kwezani kutentha kufika 5055C.Mayeso a zitsanzo, okonzeka kugwiritsidwa ntchito.
Madzi a m'madontho adzawumitsidwa mwamsanga ndi mpweya wotentha kwambiri, ndiyeno kusakaniza kolimba kwa gasi kudzatulutsidwa mwamsanga kuchokera munsanja yowumitsa, kusunga kutentha kwa mpweya wotuluka pamtunda wapansi wa zipangizo zowumitsa. 79 ° C -81 ° Co. Kusakaniza kolimba kwa gasi kumatsogoleredwa kuchokera ku zipangizo zowumitsira Mukachoka, onjezerani mpweya wouma 5 ° C wouma kuti uzizizira, ndipo mpweya wokhala ndi ufa umalowetsedwa mu fyuluta yaikulu ya thumba, ndi ufa mkati. mpweya umasiyanitsidwa ndi njira ziwiri zolekanitsa mphepo yamkuntho ndi kulekanitsa kusefa., Ufa wolekanitsidwa umasankhidwa ndikusefa kuti upeze zilumba za latex powder.
Kunyamula makilogalamu 1,000 amadzimadzi omwazika okhala ndi olimba a 42% kupita ku nsanja yowumitsa pamagetsi ena, ndikuwonjezera 51 kg ya wotulutsa molingana ndi njira yomwe tafotokozayi, nthawi yomweyo, youma ndi kupopera mbewu mankhwalawa ndikulekanitsa olimba ndi gasi, ndikupeza. ufa wokwana 461kg wokhala ndi fineness yoyenera.
Nthawi yotumiza: Feb-27-2023