Dangantakar foda na latex zuwa ruwa lokacin da aka sake tarwatsewa, daban-daban viscosities na latex foda bayan tarwatsawa, tasiri akan abun cikin iska na turmi da rarraba kumfa na iska, hulɗar tsakanin foda na roba da sauran abubuwan ƙari, da sauransu, sun bambanta. latex powders sun kara yawan ruwa., Ƙara thixotropy, ƙara danko da sauransu.
Inganta iya aiki
An yi imani da cewa redispersible latex foda inganta workability na sabon turmi: latex foda, musamman ma colloid m, yana da dangantaka da ruwa da kuma ƙara danko na slurry da kuma inganta cohesion na ginin turmi.Bayan sabon turmi mai gauraya mai dauke da latex foda tarwatsewa an kafa, tare da shayar da ruwa ta saman tushe, da amfani da hydration dauki, da volatilization zuwa iska, ruwa zai ragu sannu a hankali, barbashi za su kusanci a hankali, ke dubawa sannu a hankali za su zama blur, kuma a hankali za su haɗu da juna kuma a ƙarshe su haɗu.shirya fim.Tsarin samar da fim ɗin polymer ya kasu kashi uku.A cikin mataki na farko, ƙwayoyin polymer suna motsawa cikin yardar kaina a cikin nau'i na motsi na Brownian a farkon emulsion.Yayin da ruwa ke ƙafewa, motsin ɓangarorin a zahiri yana ƙara ƙuntatawa, kuma tashin hankali tsakanin ruwa da iska yana tilasta musu su daidaita a hankali tare.A mataki na biyu, lokacin da barbashi suka fara tuntuɓar juna, ruwan da ke cikin hanyar sadarwa yana ƙafewa ta cikin capillary, kuma matsanancin tashin hankali da ake yi a saman sassan jikin yana haifar da nakasawa na latex spheres don haɗa su tare, kuma Ruwan da ya rage yana cika pores, kuma fim ɗin yana da ƙima.Mataki na uku, mataki na ƙarshe yana ba da damar watsawa (wani lokaci ana kiran kai-manne) na ƙwayoyin polymer don samar da fim ɗin ci gaba na gaskiya.A lokacin ƙirƙirar fim, keɓaɓɓen barbashi na latex na wayar hannu suna haɓaka zuwa wani sabon yanayin fim tare da matsanancin damuwa.Babu shakka, don ba da damar foda na latex da za a iya sakewa don samar da fim a cikin turmi mai tauri, ya zama dole a tabbatar da cewa mafi ƙarancin zafin jiki na fim (MFT) ya yi ƙasa da yanayin zafin turmi.
Ƙara damuwa na kayan abu
Tare da samuwar ƙarshe na fim ɗin polymer, tsarin da ya ƙunshi inorganic da sifofin ɗaure, wato, kwarangwal da kwarangwal wanda ya haɗa da kayan aikin ruwa, da fim ɗin da aka kafa ta hanyar redispersible latex foda a cikin gibba da fage masu ƙarfi an kafa su a cikin turmi warke.m cibiyar sadarwa.Ƙarfin ƙarfi da haɗin kai na fim ɗin resin polymer wanda aka kafa ta latex foda yana haɓaka.Saboda sassaucin ra'ayi na polymer, ƙarfin nakasar ya fi girma fiye da na dutsen siminti mai tsauri, aikin nakasar turmi yana inganta, kuma tasirin watsar da damuwa yana inganta sosai, ta haka ne inganta haɓakar juriya na turmi. .Tare da karuwar abun ciki na foda na latex wanda za'a iya rarrabawa, tsarin duka yana tasowa zuwa filastik.A cikin yanayin babban abun ciki na latex foda, lokaci na polymer a cikin turmi da aka warke sannu a hankali ya wuce lokacin samfurin hydration na inorganic, kuma turmi zai fuskanci canji mai mahimmanci kuma ya zama elastomer, yayin da samfurin hydration na ciminti ya zama "filler".“.Ƙarfin ƙwanƙwasa, elasticity, sassauƙa da hatimin turmi wanda aka gyara ta hanyar sake tarwatsa foda na latex duk an inganta su.Haɗuwa da foda mai sake tarwatsewa yana ba da damar fim ɗin polymer (fim ɗin latex) don samar da kuma samar da wani ɓangare na bangon pore, don haka rufe babban tsarin porosity na turmi.Membran latex yana da tsarin mikewa da kansa wanda ke haifar da tashin hankali inda aka makala shi zuwa turmi.Ta hanyar waɗannan dakarun cikin gida, ana kiyaye turmi gaba ɗaya, ta haka yana ƙara ƙarfin haɗin kai na turmi.Kasancewar gyare-gyaren gyare-gyare mai sauƙi da ƙwaƙƙwarar polymers yana inganta haɓaka da haɓakar turmi.Hanyar haɓakar haɓakar haɓakar yawan amfanin ƙasa da ƙarfin gazawar ita ce kamar haka: lokacin da aka yi amfani da ƙarfi, ana jinkirta microcracks har sai an sami matsananciyar damuwa saboda ingantaccen sassauci da haɓaka.Bugu da kari, wuraren da aka sakar na polymer suma suna hana haduwar microcracks zuwa shiga fasa.Sabili da haka, foda na polymer wanda za'a iya tarwatsawa yana inganta haɓakar rashin ƙarfi da rashin ƙarfi na kayan aiki.
Lokacin aikawa: Maris-09-2023