A thickener for latex Paint dole ne mai kyau karfinsu tare da emulsion polymer fili, in ba haka ba da shafi fim zai sami wani karamin adadin reticulate, kuma zai samar da irreversible barbashi agglomeration, wanda zai rage danko da kuma m da barbashi size. Mai kauri zai canza cajin emulsion. Misali, thickener na cationic zai sami sakamako mara jurewa akan emulsifier anionic don karya emulsion. Madaidaicin kauri don fenti na latex dole ne ya sami kaddarorin masu zuwa:
1. Low sashi da kyau danko
2. Kyakkyawan kwanciyar hankali na ajiya, babu raguwar danko saboda aikin enzymes, kuma babu raguwar danko saboda canje-canje a cikin zafin jiki da darajar PH.
3, kyakykyawan rikon ruwa, babu wani abu mai kumfa a bayyane
4. Babu sakamako masu illa akan abubuwan fim kamar juriya na gogewa, mai sheki, ikon ɓoyewa da juriya na ruwa
5. Babu pigment flocculation
Fasaha mai kauri na fenti na latex shine muhimmin ma'auni don inganta ingancin latex da rage farashi. Hydroxyethyl cellulose ne mai manufa thickener, wanda yana da multifunctional effects a kan thickening, stabilization da rheological gyara na latex Paint.
A cikin tsarin samar da launi na latex.hydroxyethyl cellulose (HEC)ana amfani dashi azaman mai rarrabawa, mai kauri da pigment mai dakatarwa don daidaita dankon samfurin, rage haɓakawa, sanya fim ɗin fenti mai santsi da santsi, sannan kuma sanya fenti na latex ya fi tsayi. Kyakkyawan rheology, yana iya jure babban ƙarfi mai ƙarfi, kuma yana iya samar da matakan daidaitawa mai kyau, juriya da juriya da daidaiton launi. Har ila yau, HEC yana da kyakkyawan aiki, kuma fentin latex da aka yi da kauri tare da HEC yana da pseudoplasticity, don haka hanyoyin gine-gine kamar gogewa, jujjuyawar, cikawa, da feshi suna da fa'idar ceton aiki, ba sauƙin tsaftacewa da sag ba, da ƙarancin fantsama. HEC yana da kyakkyawan ci gaban launi. Yana da kyakkyawan rashin daidaituwa tare da mafi yawan masu launi da masu ɗaure, yana ba da damar tsara fenti na latex tare da kyakkyawan launi da kwanciyar hankali. Ƙwararren da aka yi amfani da shi a cikin tsari, shi ne wanda ba na ionic ether ba. Sabili da haka, ana iya amfani da shi a cikin kewayon pH mai faɗi (2 ~ 12), kuma ana iya haɗe shi tare da abubuwan da aka haɗa na fenti na latex na gabaɗaya kamar su pigments masu amsawa, ƙari, salts mai narkewa ko electrolytes.
Babu wani sakamako mara kyau akan fim ɗin shafa. Domin HEC mai ruwa bayani yana da bayyane ruwa surface tashin hankali halaye, shi ne ba sauki a kumfa a lokacin samar da gini, da kuma hali na volcanic ramukan da pinholes ne m.
Kyakkyawan kwanciyar hankali na ajiya. A cikin tsarin ajiya na dogon lokaci, ana iya kiyaye dispersibility da dakatar da pigment, kuma babu matsala na iyo launi da furanni. Lokacin da akwai ɗan ƙaramin ruwa a saman fenti kuma yanayin ajiya yana canzawa sosai. Dankowar sa har yanzu yana da inganci.
HEC na iya ƙara ƙimar PVC (ƙarar ƙarar launi) ƙaƙƙarfan abun ciki har zuwa 50-60%. Bugu da ƙari, mai kauri na topcoat na fenti na tushen ruwa kuma zai iya amfani da HEC.
A halin yanzu, masu kauri da ake amfani da su a cikin manyan fenti na gida ana shigo da su HEC da acrylic polymers (ciki har da polyacrylates, homopolymer ko copolymer emulsion thickeners na acrylic acid da methacrylic acid) masu kauri.
Hydroxyethyl cellulose za a iya amfani da
1. A matsayin mai watsawa ko manne mai kariya
Gabaɗaya, ana amfani da HEC tare da danko na 10 zuwa 30mPaS. Ana iya amfani da HEC na har zuwa 300mPa·S a hade tare da anionic ko cationic surfactants, kuma tasirin watsawa ya fi kyau. Adadin ma'anar gabaɗaya shine 0.05% na yawan adadin monomer.
2, a matsayin mai kauri
Yi amfani da 15000mPa. Matsakaicin ma'auni na high-viscosity HEC sama da s shine 0.5 zuwa 1% na yawan adadin latex, kuma ƙimar PVC na iya kaiwa kusan 60%. A cikin fenti na latex, ana amfani da HEC na kusan 20Pa,s, kuma nau'ikan kaddarorin fentin latex sune mafi kyau. Farashin kawai amfani da HEC sama da 30O00Pa.s ya yi ƙasa. Koyaya, matakin daidaitawa da sauran halayen fenti na latex ba su da kyau. Daga ra'ayi na ingancin buƙatun da rage farashin, ya fi dacewa don amfani da matsakaici da babban danko HEC tare.
3. Hanyar haɗawa a cikin launi na latex
Za'a iya ƙara HEC da aka yi amfani da shi a cikin busassun foda ko nau'in slurry. Ana ƙara busasshen foda kai tsaye zuwa niƙa mai launi. pH na ma'aunin ƙari ya kamata ya zama 7 ko ƙasa. Ana iya ƙara abubuwan alkali kamar masu rarrabawa bayan an gamaHECan jika kuma an watse sosai. Ya kamata a haɗe slurry ɗin da aka yi da HEC a cikin slurry kafin HEC ta sami isasshen lokaci don yin ruwa da kauri zuwa yanayin da ba za a iya amfani da shi ba. Hakanan za'a iya shirya slurries HEC tare da ma'auni na tushen glycol.
4. Anti-mildew na latex fenti
Ruwa-mai narkewa HEC biodegrades lokacin da fallasa su molds da ke da takamaiman cellulose da abubuwan da aka samo asali. Ƙara abubuwan kiyayewa don fenti kawai bai isa ba, duk abubuwan da aka gyara dole ne su kasance marasa enzyme. Motocin samar da fenti na latex dole ne a kiyaye su da tsabta da tsabta, kuma duk kayan aikin dole ne a ba su haifuwa akai-akai tare da maganin tururi 0.5% formalin ko 0.1% mercury.
Lokacin aikawa: Afrilu-25-2024