Redispersible latex fodafoda ce da aka gyara ta hanyar fesa bushewa na binaryar ko ternary copolymer na vinylacetase da ethylene tert carbonate VoVa ko alkene ko acrylic acid.Yana da kyau sake tarwatsewa, kuma yana sake tarwatsewa zuwa cikin ruwan shafa fuska idan ya hadu da ruwa, kuma sinadaren sinadaransa iri daya ne da na asali.
Binciken kan redispersible latex foda ya fara ne a cikin 1934 tare da IG Farbenindus AC a cikin polyvinylidene acid na Jamus wanda zai iya rarraba latex foda.
Kuma Jafananci foda latex.Bayan yakin duniya na biyu, an yi fama da karancin kayan aiki da gine-gine, lamarin da ya tilastawa Turai musamman Jamus yin amfani da kayan aikin foda iri-iri don inganta aikin gine-gine.A cikin ƙarshen 1950s, Kamfanin Hearst na Jamus da Kamfanin Chemical Wacker sun fara samar da foda na latex na masana'antu.A wancan lokacin, foda mai iya tarwatsawa ya kasance na nau'in polyvinyl acetate, wanda akasari ana amfani dashi don aikin katako, kayan aikin bango, da kayan bangon siminti.Duk da haka, saboda iyakokin PVac m foda ta babban ƙaramin fim ɗin samar da zafin jiki, ƙarancin juriya na ruwa, da ƙarancin juriya na alkali, amfani da shi yana da iyaka.
Tare da nasarar masana'antu na VAE ruwan shafa fuska da VA/VeoVa ruwan shafa,redispersible emulsion fodatare da mafi ƙarancin yanayin zafin fim na 0C, ingantaccen juriya na ruwa da juriya na alkali an haɓaka su a cikin 1960s.Bayan haka, aikace-aikacen sa ya kasance mai girma a Turai, kuma aikace-aikacensa a hankali ya faɗaɗa zuwa nau'o'in gine-ginen gine-gine da marasa tsarin gine-gine, gyaran gyare-gyaren busassun busassun, rufin bango da tsarin ƙarewa, bangon bango da kuma rufe plaster Filin rufin foda da ginin ginin. .
Samar da gida na redispersible latex foda A cikin 'yan shekarun nan, da bukatarredispersible latex fodaa Turai da Arewacin Amurka ya girma sannu a hankali.Sabanin haka, yayin da sannu a hankali aka aiwatar da manufar kiyaye makamashin gini na kasar Sin, da kuma kara kaimi ga busasshen turmi ga gine-gine, yin amfani da foda mai saurin tarwatsewa a yankin kasar Sin ya karu cikin sauri.Kamfanonin kasashen waje da wasu kamfanoni na cikin gida suma sun kaddamar da ayyukan sake tarwatsa foda a fadin kasar.Dangane da kididdigar kwararrun da suka dace, a cikin 2003, samar da foda mai yuwuwa a duniya shine ton 190000, galibi ana amfani dashi a Turai da Arewacin Amurka.Abin da ake amfani da shi a kasuwar Sin bai wuce tan 5000 ba.Duk da haka, a cikin 2007, yawan amfani da foda mai yuwuwa a kasuwa a kasar Sin ya kai tan 450000, tare da manyan masu samar da kayayyaki sune Dalian Chemical, Wacker daga Jamus, da kuma National Starch daga Amurka.An yi hasashen cewa a shekara ta 2010, buƙatun foda na latex da za a iya tarwatsawa a China zai kai ton 100000.
Nau'in foda na latex wanda za'a iya sakewa:
Babban nau'ikan foda na latex wanda za'a iya rarrabawa a halin yanzu ana amfani dashi a kasuwa sune:
Vinyl acetate da ethylene copolymer foda (Vac / E), ethylene da vinyl chloride, da montmorillonite ethylene ternary copolymer foda (E/Vc/VL), vinyl acetate da ethylene da mafi girma m acid ethylene ternary copolymer foda (Vac/E/VeoVa) , vinyl acetate da mafi girma fatty acid ethylene copolymer foda (Vac / VeoVa), acrylic acid da ethylene copolymer foda (A / S), vinyl acetate da acrylic acid, kuma mafi girma m acid ethylene copolymer foda (Vac / A / VeoVa) Cool acid ethylene sanyi homopolymer roba foda (PVac), styrene butadiene copolymer roba foda (SBR), da dai sauransu.
Haɗin foda mai sake rarrabuwa:
*Furan latex da za'a iya tarwatsawa yawanci fari ne, amma kuma akwai wasu wasu launuka da ake samu.Abubuwan da ke cikinsa sun haɗa da: *Polymer resin: wanda yake a tsakiyar ɓangarorin foda na roba, kuma shine babban abin da za a iya amfani da shi don tarwatsa foda na latex.
*Ƙari (na ciki): Ana amfani da shi tare da guduro don gyara guduro.
*Additives (na waje): Domin ƙara fadada aikin redispersible latex foda, ana kara ƙarin kayan.
Colloid mai kariya:
A Layer na hydrophilic abu nannade a kan saman redispersible latex foda barbashi, wanda mafi yawansu za a iya redispersible.
Colloid mai kariya na tarwatsa foda na latex shine polyvinyl barasa.
Wakilin Anti Caking: Fitaccen ma'adinan ma'adinai da aka fi amfani da shi don hana cakuɗe foda a lokacin ajiya da sufuri, da sauƙaƙe kwararar foda (zuba daga jakunkuna na takarda ko motocin tanki)
MatsayinRDP:
*Furan latex wanda za'a iya sakewa yana samar da fim bayan watsawa kuma yana aiki azaman mannewa na biyu don haɓaka ƙarfinsa;
*Tsarin turmi yana shanye colloid mai kariya (ba zai lalata shi da ruwa ba bayan ƙirƙirar fim, ko "watsawa na biyu"):
* Ana rarraba resin polymer mai yin fim azaman kayan ƙarfafawa a cikin duk tsarin turmi, ta haka yana haɓaka haɗin turmi:
Ayyukan samfur:
Ana yin foda mai sake tarwatsewa daga ruwan shafa na polymer ta bushewar feshi.Bayan hadawa da ruwa a turmi, an yi emulsified da tarwatsa cikin ruwa don samar da wani barga polymer ruwan shafa fuska sake.Bayan redispersible latex foda ne emulsified kuma tarwatsa a cikin ruwa, ruwa evaporates, forming wani polymer film a cikin turmi don inganta aikin turmi.Daban-daban redispersible latex foda yana da daban-daban tasiri a kan bushe foda turmi.Ta hanyar haɓaka juriya na tasiri, dorewa, da juriya na turmi, ƙwayoyin foda masu mannewa suna cika ramukan turmi, suna ƙara haɓakawa da haɓaka juriya.A karkashin aikin sojojin waje, zai haifar da shakatawa ba tare da lalacewa ba.Fina-finan manne da polymer na iya wanzuwa har abada a tsarin turmi.Inganta aikin ginin turmi.
Akwai tasirin lubricating tsakanin barbashi na polymer m foda, ƙyale kayan aikin turmi su gudana da kansu, yayin da foda mai mannewa yana da tasiri mai tasiri akan iska, p.roside compressibility na turmi da inganta ta workability a lokacin gini.Inganta ƙarfin haɗin gwiwa da haɗin kai na turmi.
Bayan an yi fim daredispersible latex fodaa matsayin mai ɗaure nau'in halitta, yana iya samar da ƙarfin ƙarfi mai ƙarfi da ƙarfin mannewa akan nau'ikan daban-daban.Yana taka muhimmiyar rawa a cikin manne tsakanin turmi da kwayoyin kayan (EPS, extruded kumfa jirgin) da kuma m surface substrate.Ana rarraba fim ɗin polymer m foda a matsayin kayan ƙarfafawa a cikin dukan tsarin turmi, yana ƙara haɓakar turmi.Don inganta juriya na yanayi, daskare-narke juriya, da hana turmi fashewa, redispersible latex foda na thermoplastic resin, wanda yana da kyau sassauci kuma zai iya sa turmi ya dace da yanayin sanyi na waje da yanayin zafi, yadda ya kamata ya hana turmi fashe saboda bambancin zafin jiki. .Ta hanyar inganta hydrophobicity na turmi da rage sha ruwa, za a iya sake tarwatsa foda na latex don samar da fim a kan rami da saman turmi.Ba za a sake tarwatsa fim ɗin manne polymer ba bayan saduwa da ruwa, yana hana mamaye ruwa da haɓaka rashin ƙarfi.Musamman redispersible latex foda tare da hydrophobic sakamako yana da mafi alhẽri hydrophobic sakamako.Inganta ƙarfin lanƙwasawa da ƙarfin sassauƙa na turmi.
Aikace-aikacen samfur:
Tsarin rufin bango na waje:
Turmi mai ɗaurewa: Tabbatar cewa turmi yana manne da bango ga allon EPS.Inganta ƙarfin haɗin gwiwa.
Turmi plastering: Tabbatar da ƙarfin injina, juriyar tsaga, dorewa, da juriya mai tasiri na tsarin rufewa.
Haɗin haɗin gwiwa: Rashin ƙarfin turmi zuwahana shigar ruwa.A lokaci guda, yana da kyakkyawan mannewa tare da gefuna na yumbura yumbura, ƙananan raguwa, da sassauci.
gyare-gyaren tayal da katako na katako: Inganta mannewa da ƙarfin haɗin gwiwa na putty akan wasu abubuwa na musamman (kamar fale-falen yumbu, mosaics, plywood, da sauran filaye masu santsi), tabbatar da cewa putty yana da sassauci mai kyau don ƙulla ƙimar haɓakar haɓakar substrate.
Masonry da plastering turmi: Inganta riƙe ruwa.Rage asarar ruwa akan abubuwan da ba su da ƙarfi.
Tumi mai hana ruwa ruwa bisa siminti:Tabbatar da aikin hana ruwa na rufin turmi, yayin da kuma yana da kyakkyawar mannewa tare da saman tushe, da inganta ƙarfin matsawa da sassauƙa na turmi.
Turmi mai daidaita kai:Tabbatar da madaidaicin madaidaicin modules na turmi, da juriya ga lankwasawa da fashewa.Inganta juriyar lalacewa, ƙarfin haɗin gwiwa, da haɗin turmi.
Turmi mai mu'amala:Inganta ƙarfin saman ƙasa kuma tabbatar da ƙarfin haɗin gwiwa na turmi.
Ciki da na waje bango putty:Haɓaka ƙarfin haɗin gwiwa na putty kuma tabbatar da cewa yana da takamaiman matakin sassauƙa don kwantar da damuwa daban-daban na faɗaɗawa da matsananciyar matsananciyar ƙayatarwa ta tushe daban-daban.Tabbatar cewa putty yana da kyakkyawan juriya na tsufa, rashin ƙarfi, da juriya na danshi.
Gyara turmi:Tabbatar cewa adadin faɗaɗa turmi ya yi daidai da na ƙashin ƙasa, kuma a rage maɗaurin turmi.Tabbatar cewa turmi yana da isassun hydrophobicity, numfashi, da ƙarfin haɗin gwiwa.
Tile manne da haɗin gwiwa:Tile m: yana ba da haɗin gwiwa mai ƙarfi don turmi, yana ba da isasshen sassauci don ƙulla nau'ikan haɓaka haɓakar thermal daban-daban na substrate da fale-falen yumbu.Inganta sauƙin ayyukan gine-gine da inganta ingantaccen aiki
Lokacin aikawa: Oktoba-08-2023