Redispersible latex powder ndi emulsion yapadera yochokera m'madzi ndi polima binder yopangidwa poyanika ndi vinyl acetate-ethylene copolymer monga chopangira chachikulu. Pambuyo gawo la madzi ukuphwera, ndi polima particles kupanga polima filimu ndi agglomeration, amene amakhala ngati binder. Pamene redispersible latex ufa ntchito pamodzi ndi organic gelling mchere monga simenti, akhoza kusintha matope. Ntchito zazikulu za redispersible latex powder ndi izi.
(1) Kupititsa patsogolo mphamvu ya mgwirizano, kulimba kwamphamvu ndi mphamvu yopindika.
Redispersible latex ufa ukhoza kupititsa patsogolo mphamvu ya mgwirizano wamatope. Kuchulukitsitsa kowonjezera, kumakwezanso kukweza. Mphamvu zomangirira kwambiri zimatha kuletsa kuchepa pang'onopang'ono, ndipo nthawi yomweyo, kupsinjika komwe kumapangidwa ndi mapindikidwe ndikosavuta kufalikira ndikumasula, kotero mphamvu yomangirira ndiyofunikira kwambiri pakuwongolera kukana kwa ming'alu. Kafukufuku wasonyeza kuti synergistic zotsatira za cellulose ether ndi polima ufa kumathandiza kusintha chomangira mphamvu ya simenti matope.
(2) Chepetsani zotanuka modulus ya matope, kuti matope a simenti osasunthika azikhala ndi kusinthasintha kwina.
The zotanuka modulus redispersible latex ufa ndi otsika, 0.001-10GPa; pamene zotanuka modulus matope simenti ndi apamwamba, 10-30GPa, kotero zotanuka modulus matope simenti adzachepa ndi kuwonjezera polima ufa. Komabe, mtundu ndi kuchuluka kwa ufa wa polima umakhalanso ndi mphamvu pa modulus ya elasticity. Kawirikawiri, pamene chiŵerengero cha polima ndi simenti chikuwonjezeka, modulus ya elasticity imachepa ndipo kupunduka kumawonjezeka.
(3) Sinthani kukana kwamadzi, kukana kwa alkali, kukana kwa abrasion ndi kukana kwamphamvu.
Maonekedwe a nembanemba opangidwa ndi polima amasindikiza mabowo ndi ming'alu mumatope a simenti, amachepetsa porosity ya thupi lowuma, motero amawongolera kusakwanira, kukana madzi ndi kukana chisanu kwa matope a simenti. Izi zimawonjezeka ndi kuchuluka kwa simenti ya polima. Kusintha kwa kukana kuvala kumakhudzana ndi mtundu wa ufa wa polima ndi chiŵerengero cha polima ndi simenti. Nthawi zambiri, kukana kuvala kumakhala bwino pamene chiŵerengero cha polima ndi simenti chikuwonjezeka.
(4) Kupititsa patsogolo kutulutsa madzi komanso kugwira ntchito kwamatope.
(5) Sinthani kasungidwe ka madzi mumatope ndikuchepetsa kutuluka kwa madzi.
The polima emulsion wopangidwa ndi Kusungunuka redispersible polima ufa m'madzi ndi omwazikana mu matope, ndi mosalekeza organic filimu aumbike mu matope pambuyo solidification. Izi organic filimu angalepheretse kusamuka kwa madzi, potero kuchepetsa imfa ya madzi mu mtondo ndi kuchita mbali mu kusunga madzi.
(6) Kuchepetsa kusweka kwa zochitika
Kutalikira ndi kulimba kwa matope a simenti osinthidwa ndi polima ndizabwinoko kuposa matope wamba a simenti. The flexural performance is more than 2 times of the wamba simenti matope; kulimba kwamphamvu kumawonjezeka ndi kuwonjezeka kwa chiŵerengero cha simenti ya polima. Ndi kuwonjezeka kwa kuchuluka kwa ufa wa polima wowonjezera, kusinthasintha kosinthika kwa polima kumatha kulepheretsa kapena kuchedwetsa kukula kwa ming'alu, ndipo nthawi yomweyo imakhala ndi zotsatira zabwino zobalalika.
Nthawi yotumiza: Jun-20-2023