Zotsatira za mlingo wa RDP pa mphamvu ya putty bonding ndi kukana madzi

Putty ndi zinthu zoyambira zomwe zimagwiritsidwa ntchito kwambiri pomanga zokongoletsa, ndipo mtundu wake umakhudza mwachindunji moyo wautumiki ndi kukongoletsa kwa zokutira khoma. Mphamvu zomangirira ndi kukana madzi ndizizindikiro zofunika pakuwunika magwiridwe antchito a putty.Redispersible latex ufa, monga organic polima zosinthidwa zakuthupi, zimagwira ntchito yofunika kwambiri pakuwongolera magwiridwe antchito.

1. Njira yochitiranso ufa wa latex

Redispersible latex ufa ndi ufa wopangidwa ndi kutsitsi kuyanika kwa polymer emulsion. Itha kukonzanso kuti ipange dongosolo lokhazikika la polima lobalalika pambuyo polumikizana ndi madzi, zomwe zimathandizira kukulitsa mphamvu zomangira ndi kusinthasintha kwa putty. Ntchito zake zazikulu ndi izi:

Kupititsa patsogolo mphamvu zomangira: Redispersible latex ufa umapanga filimu ya polima panthawi yowumitsa ya putty, ndikugwirizanitsa ndi zinthu zopangira ma gelling kuti apititse patsogolo luso lolumikizana.

Kupititsa patsogolo kukana madzi: ufa wa latex umapanga maukonde a hydrophobic mu kapangidwe ka putty, kuchepetsa kulowa kwa madzi ndikuwongolera kukana madzi.

Kupititsa patsogolo kusinthasintha: Kutha kuchepetsa kuphulika kwa putty, kupititsa patsogolo luso la kusinthika, komanso kuchepetsa chiopsezo cha ming'alu.

2. Kuphunzira moyesera

Zida zoyesera

Zida zoyambira: ufa wopangidwa ndi simenti

Redispersible latex ufa: ethylene-vinyl acetate (EVA) copolymer latex ufa

Zowonjezera zina: thickener, madzi kusunga wothandizira, filler, etc.

Njira yoyesera

Ma putty okhala ndi mitundu yosiyanasiyana ya ufa wa latex (0%, 2%, 5%, 8%, 10%) adakonzedwa motsatana, ndipo mphamvu zawo zomangira komanso kukana madzi zidayesedwa. Mphamvu yomangirira idatsimikiziridwa ndi kuyesa kochotsa, ndipo kuyesa kwamadzi kumawunikidwa ndi kuchuluka kwa kusunga mphamvu pambuyo pa kumizidwa m'madzi kwa maola 24.

3. Zotsatira ndi zokambirana

Zotsatira za ufa wonyezimira wa latex pa mphamvu yomangira

Zotsatira zoyesa zikuwonetsa kuti pakuwonjezeka kwa mlingo wa RDP, mphamvu yomangirira ya putty ikuwonetsa chizolowezi choyambira ndikukhazikika.

Pamene mlingo wa RDP ukuwonjezeka kuchoka pa 0% kufika pa 5%, mphamvu yomangira ya putty imakhala yabwino kwambiri, chifukwa filimu ya polima yopangidwa ndi RDP imapangitsa kuti pakhale mgwirizano pakati pa zinthu zoyambira ndi putty.

Pitirizani kuonjezera RDP kupitirira 8%, kukula kwa mphamvu zomangirira kumakhala kosavuta, ndipo ngakhale kutsika pang'ono pa 10%, zomwe zingakhale chifukwa chakuti RDP yochuluka idzakhudza dongosolo lolimba la putty ndikuchepetsa mphamvu ya mawonekedwe.

Zotsatira za ufa wa latex wopangidwanso pakukana madzi

Zotsatira zoyesa kukana madzi zikuwonetsa kuti kuchuluka kwa RDP kumakhudza kwambiri kukana kwamadzi kwa putty.

Mphamvu yomangirira ya putty popanda RDP idatsika kwambiri itatha kumizidwa m'madzi, kuwonetsa kusamvana kwamadzi.

Kuphatikizika kwa RDP yokwanira (5% -8%) kumapangitsa kuti putty apange mawonekedwe owundana a organic-inorganic composite, amathandizira kukana madzi, ndipo amathandizira kwambiri kusungira mphamvu pambuyo pa maola 24 akumizidwa.

Komabe, zomwe zili mu RDP zikadutsa 8%, kuwongolera kwamadzi kumachepa, zomwe zitha kukhala chifukwa chakuti zinthu zambiri zakuthupi zimachepetsa mphamvu ya anti-hydrolysis ya putty.

Zotsatira zotsatirazi zitha kutengedwa kuchokera ku kafukufuku woyeserera:

Kuchuluka koyenera kwaredispersible latex ufa(5% -8%) imatha kupititsa patsogolo mphamvu zomangira komanso kukana kwamadzi kwa putty.

Kugwiritsa ntchito kwambiri kwa RDP (> 8%) kumatha kukhudza mawonekedwe olimba a putty, zomwe zimapangitsa kuti pang'onopang'ono kapenanso kuchepetsa kupititsa patsogolo mphamvu zomangira ndi kukana madzi.

Mlingo woyenera kwambiri uyenera kukonzedwa molingana ndi momwe amagwiritsira ntchito putty kuti akwaniritse bwino pakati pa magwiridwe antchito ndi mtengo.