Kodi redispersible latex powder ndi chiyani?

Gawo loyamba popanga ufa wopangidwanso ndi polima ndikutulutsa kufalikira kwa polima, komwe kumatchedwanso emulsion kapena latex. Pochita izi, madzi-emulsified monomers (okhazikika ndi emulsifiers kapena macromolecular protective colloids) amachita ndi oyambitsa kuyambitsa emulsion polymerization. Kupyolera mu izi, ma monomers amalumikizidwa kuti apange mamolekyu amtali (macromolecules), kutanthauza ma polima. Panthawi imeneyi, monoma emulsion m'malovu kusintha mu polima "olimba" particles. Izi polima emulsions, ndi stabilizers pa tinthu pamalo ayenera kuteteza lalabala mwa njira iliyonse coalescing motero destabilizing. Chosakanizacho chimapangidwa kuti chiwumitse kupopera powonjezera zowonjezera zowonjezera, ndipo kuwonjezera kwa ma colloids otetezera ndi anti-caking agents amalola polima kuti apange ufa wopanda pake womwe ukhoza kubwezeretsedwanso m'madzi pambuyo poyanika kupopera.

The redispersible latex ufa amagawidwa bwino wosakaniza youma matope matope. Mtondo ukasakanizidwa ndi madzi, ufa wa polima umabalalitsidwanso mu slurry wosakanizidwa mwatsopano ndi emulsified kachiwiri; chifukwa cha hydration ya simenti, evaporation pamwamba ndi / kapena kuyamwa kwa m'munsi wosanjikiza, pores mkati ndi mfulu Kumwa madzi mosalekeza kumapangitsa kuti tinthu ta latex tiwume kuti tipange filimu yosasunthika yopanda madzi m'madzi. Izi mosalekeza filimu aumbike ndi maphatikizidwe limodzi omwazika particles mu emulsion mu homogeneous thupi. Kuti athe redispersible latex ufa kupanga filimu mu matope olimba, ayenera kuonetsetsa kuti osachepera filimu kupanga kutentha ndi otsika kuposa kuchiritsa kutentha kwa matope osinthidwa.

Maonekedwe a tinthu ta ufa wa polima wopangidwanso ndi mawonekedwe ake opangidwanso ndi filimu pambuyo pa kubalalikanso kumapangitsa kukhala ndi zotsatira zotsatirazi pakuchita kwa matope mumkhalidwe watsopano ndi wowuma:

1. Ntchito mumatope atsopano

◆ "Kupaka mafuta" kwa tinthu tating'onoting'ono kumapangitsa kuti matope osakaniza akhale ndi madzi abwino, kuti apeze ntchito yomanga bwino.

◆ The mpweya-entraining zotsatira zimapangitsa matope compressible, kupanga troweling mosavuta.

◆ Kuwonjezera mitundu yosiyanasiyana ya ufa wa latex wosinthika ukhoza kupeza matope osinthidwa ndi mapulasitiki abwino kapena owoneka bwino.

2. Ntchito mumatope owuma

◆ Filimu ya latex ikhoza kulumikiza ming'alu ya shrinkage pa mawonekedwe a matope oyambira ndikuchiritsa ming'alu ya shrinkage.

◆ Kongoletsani kusindikizidwa kwa matope.

◆ Kupititsa patsogolo mphamvu yogwirizanitsa yamatope: kukhalapo kwa zigawo zosinthika kwambiri komanso zotanuka kwambiri za polima zimathandizira kusinthasintha ndi kusungunuka kwa matope,

Amapereka machitidwe ogwirizana komanso osinthika a mafupa olimba. Pamene mphamvu ikugwiritsidwa ntchito, chifukwa cha kusinthasintha kwabwino komanso kusinthasintha

Ma Microcracks amachedwa mpaka kupsinjika kwakukulu kufikire.

◆ Interwoven polima madambwe amalepheretsanso coalescence wa microcracks kulowa m'ming'alu. Choncho, redispersible polima ufa amathandizira kulephera kupsinjika ndi kulephera kwa zinthuzo.

M'pofunika kuwonjezera redispersible latex ufa kuti ziume matope simenti, chifukwa redispersible latex ufa makamaka ali ubwino sikisi zotsatirazi, ndipo zotsatirazi ndi mawu oyamba kwa inu.

1. Kupititsa patsogolo mgwirizano ndi mgwirizano

Redispersible latex ufa umakhala ndi gawo lalikulu pakukweza mphamvu zomangira ndi kulumikizana kwa zida. Chifukwa cha malowedwe a polima particles mu pores ndi capillaries a simenti masanjidwewo, mgwirizano wabwino aumbike pambuyo hydration ndi simenti. Utomoni wa polima wokha uli ndi zinthu zabwino kwambiri. Ndiwothandiza kwambiri popititsa patsogolo kumatira kwazinthu zamatope a simenti ku magawo, makamaka kusamata koyipa kwa zomangira zakuthupi monga simenti ku magawo achilengedwe monga nkhuni, CHIKWANGWANI, PVC, ndi EPS.

2. Sinthani kukhazikika kwa kuzizira komanso kupewa kusweka kwa zinthu

Redispersible latex ufa, pulasitiki ya utomoni wake wa thermoplastic imatha kuthana ndi kuwonongeka komwe kumachitika chifukwa chakukula kwamafuta ndi kutsika kwa zinthu zamatope za simenti chifukwa cha kusiyana kwa kutentha. Kugonjetsa mikhalidwe ya shrinkage yayikulu youma ndi kusweka kosavuta kwa matope osavuta a simenti, kumatha kupanga zinthuzo kukhala zosinthika, potero kumapangitsa kukhazikika kwazinthuzo kwanthawi yayitali.

3. Kupititsa patsogolo kupindika ndi kukana kwamphamvu

Mu chigoba cholimba chomwe chimapangidwa pambuyo pa matope a simenti ndi hydrated, nembanemba ya polima imakhala yotanuka komanso yolimba, ndipo imakhala ngati cholumikizira pakati pa tinthu tating'ono ta simenti, chomwe chimatha kupirira katundu wambiri wopindika ndikuchepetsa kupsinjika. Kuwonjezeka kwamphamvu komanso kukana kupindika.

4. Sinthani kukana kwamphamvu

Redispersible latex ufa ndi thermoplastic resin. Filimu yofewa yomwe imakutidwa pamwamba pa matope amatha kuyamwa mphamvu yakunja ndikupumula popanda kusweka, motero kumapangitsa kuti matope asasunthike.

5. Kupititsa patsogolo hydrophobicity ndi kuchepetsa kuyamwa madzi

Kuonjezera koko redispersible polima ufa akhoza kusintha microstructure wa matope simenti. Polima yake imapanga maukonde osasinthika panthawi ya simenti ya hydration, imatseka capillary mu gel ya simenti, imatsekereza kulowa kwa madzi, ndikuwongolera kusakwanira.

6. Sinthani kukana kuvala ndi kulimba

Kuwonjezera redispersible latex ufa akhoza kuonjezera compactness pakati pa tinthu tadothi 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 wantchito wamatope.