Masu kauri don fenti na latex dole ne su kasance masu dacewa da mahaɗan polymer na latex, in ba haka ba za a sami ƙaramin rubutu a cikin fim ɗin rufewa, kuma tarin barbashi mai canzawa zai faru, wanda ke haifar da raguwar danko da girman barbashi mai kauri. Masu kauri za su canza cajin emulsion. Misali, masu kauri cationic za su yi tasiri mara canzawa akan emulsifiers na anionic kuma suna haifar da rushewa. Dole ne mai kauri fenti na latex ya kasance yana da waɗannan halaye:
1. Ƙarancin allurai da kuma kyakkyawan ɗanko
2. Kyakkyawan kwanciyar hankali na ajiya, ba zai rage danko ba saboda aikin enzymes, kuma ba zai rage danko ba saboda canje-canje a yanayin zafi da darajar pH.
3. Rike ruwa mai kyau, babu kumfa a bayyane
4. Babu wata illa ga halayen fenti kamar juriyar gogewa, sheƙi, ƙarfin ɓoyewa da juriyar ruwa.
5. Babu kwararar launuka
Fasahar kauri ta fenti mai latex muhimmin ma'auni ne don inganta ingancin latex da rage farashi. Hydroxyethyl cellulose wani abu ne mai kauri da ya dace, wanda ke da tasiri mai yawa akan kauri, daidaito da daidaitawar fenti mai latex.
A tsarin samar da fenti na latex, ana amfani da hydroxyethyl cellulose (HEC) a matsayin mai wartsakewa, mai kauri da kuma wakili mai dakatar da launi don daidaita danko na samfurin, rage haɗuwa, sanya fim ɗin fenti ya yi santsi da santsi, da kuma sa fenti na latex ya fi dorewa. Kyakkyawan rheology, yana iya jure ƙarfin yankewa mai yawa, kuma yana iya samar da kyakkyawan matakin daidaitawa, juriya ga karce da daidaiton launi. A lokaci guda, HEC yana da kyakkyawan aiki, kuma fenti na latex da aka kauri da HEC yana da pseudoplasticity, don haka gogewa, birgima, cikawa, fesawa da sauran hanyoyin gini suna da fa'idodin adana aiki, ba shi da sauƙin sharewa, sagewa, da ƙarancin fesawa. HEC yana da kyakkyawan ci gaban launi. Yana da kyakkyawan daidaito ga yawancin masu launi da masu ɗaurewa, wanda ke sa fenti na latex ya sami kyakkyawan daidaiton launi da kwanciyar hankali. Sauƙin amfani da shi a cikin tsari, ether ne mara ionic. Saboda haka, ana iya amfani da shi a cikin kewayon pH mai faɗi (2 ~ 12), kuma ana iya haɗa shi da abubuwan da ke cikin fenti na latex gabaɗaya kamar launuka masu amsawa, ƙari, gishiri mai narkewa ko electrolytes.
Babu wani mummunan tasiri ga fim ɗin rufewa, saboda ruwan HEC yana da halaye na tashin hankali a saman ruwa, ba shi da sauƙin kumfa yayin samarwa da gini, kuma yanayin ramukan aman wuta da ramukan filaye ba su da yawa.
Kyakkyawan kwanciyar hankali a ajiya. A lokacin ajiya na dogon lokaci, ana iya kiyaye wargajewa da dakatar da launin, kuma babu matsalar launin shawagi da fure. Akwai ƙarancin ruwa a saman fenti, kuma lokacin da zafin ajiya ya canza sosai. Dankonsa har yanzu yana da ƙarfi sosai.
HEC na iya ƙara ƙimar PVC (ƙarfin yawan pigment) abun da ke ciki har zuwa 50-60%. Bugu da ƙari, mai kauri mai rufe saman fenti mai tushen ruwa kuma zai iya amfani da HEC.
A halin yanzu, masu kauri da ake amfani da su a fenti na latex na matsakaici da na babban inganci na gida ana shigo da su ne daga ƙasashen waje, waɗanda suka haɗa da polyacrylate, homopolymer ko copolymer emulsion thickeners na acrylic acid da methacrylic acid.
Ana iya amfani da hydroxyethyl cellulose don
1. A matsayin mai wargazawa ko manne mai kariya
Gabaɗaya, ana amfani da HEC mai ɗanko na 10-30mPaS. HEC wanda za a iya amfani da shi har zuwa 300mPa·S zai sami ingantaccen tasirin watsawa idan aka yi amfani da shi tare da anionic ko cationic surfactants. Matsakaicin adadin da aka yi amfani da shi gabaɗaya shine 0.05% na nauyin monomer.
2. A matsayin mai kauri
Yi amfani da 15000mPa. Matsakaicin ma'aunin HEC mai ɗanɗano mai yawa a sama da s shine 0.5-1% na jimlar nauyin fenti na latex, kuma ƙimar PVC na iya kaiwa kusan 60%. Yi amfani da HEC na kimanin 20Pa,s a cikin fenti na latex, kuma aikin fenti na latex shine mafi kyau. Kudin amfani da HEC sama da 30O00Pa.s ya yi ƙasa. Duk da haka, halayen daidaita fenti na latex ba su da kyau. Daga mahangar buƙatun inganci da rage farashi, ya fi kyau a yi amfani da HEC matsakaici da babban ɗanɗano tare.
3. Hanyar haɗawa a fenti mai latex
Ana iya ƙara HEC da aka yi wa magani a saman foda ko manna a cikin busasshen foda. Ana ƙara busasshen foda kai tsaye zuwa niƙa launin. pH a wurin ciyarwa ya kamata ya zama 7 ko ƙasa da haka. Ana iya ƙara abubuwan alkaline kamar Yanbian dispersant bayan an jika HEC kuma an wargaza shi gaba ɗaya. Ya kamata a haɗa slurries da aka yi da HEC a cikin slurry kafin HEC ta sami isasshen lokaci don yin ruwa da kuma barin ta yi kauri zuwa yanayin da ba za a iya amfani da shi ba. Haka kuma yana yiwuwa a shirya ɓangaren HEC tare da sinadaran ethylene glycol coalescing.
4. Fentin latex mai hana mold
HEC mai narkewar ruwa zai lalace idan ya taɓa molds waɗanda ke da tasiri na musamman akan cellulose da abubuwan da suka samo asali. Bai isa a ƙara abubuwan kiyayewa a fenti kawai ba, dole ne dukkan abubuwan da ke cikinsa su kasance marasa enzymes. Dole ne a kiyaye abin da ake samarwa na fenti na latex, kuma dole ne a riƙa tsaftace duk kayan aiki akai-akai da maganin tururi 0.5% formalin ko O.1% mercury.
Lokacin Saƙo: Disamba-26-2022