Hydroxyethyl Cellulose (HEC) wani abu ne na yau da kullun wanda ba na ionic ruwa mai narkewa ba tare da ingantaccen kauri, riƙewar ruwa, da abubuwan ƙirƙirar fim. Saboda haka, ana amfani dashi sosai a cikin sutura, fenti na latex, da manne. Adhesives da sauran masana'antu. Fenti na latex wani muhimmin bangare ne na kayan ado na zamani na zamani, kuma ƙari na HEC ba zai iya inganta kwanciyar hankali na fenti ba kawai, amma kuma inganta aikin gininsa.
1. Abubuwan asali na hydroxyethyl cellulose
Hydroxyethyl cellulose shine polymer mai narkewa da ruwa wanda aka samu ta hanyar gyare-gyaren sinadarai ta amfani da cellulose na halitta azaman albarkatun ƙasa. Babban fasalinsa sun haɗa da:
Thickening: HEC yana da kyau thickening sakamako, wanda zai iya muhimmanci ƙara danko na latex Paint da kuma ba latex Paint kyau kwarai thixotropy da rheology, game da shi forming uniform da m shafi a lokacin gina.
Riƙewar ruwa: HEC na iya hana ruwa da sauri da sauri a cikin fenti, ta yadda za a tsawaita lokacin buɗewar fenti na latex da inganta bushewa da ƙirƙirar kayan fim na fim ɗin fenti.
Ƙarfafawa: HEC yana da kyakkyawan kwanciyar hankali na sinadarai a cikin ƙirar fenti na latex, zai iya tsayayya da tasirin pH canje-canje, kuma ba shi da wani mummunan halayen ga sauran sinadaran a cikin fenti (irin su pigments da fillers).
Leveling: Ta hanyar daidaita adadin HEC, za a iya inganta yawan ruwa da daidaitawar fenti na latex, kuma za a iya kauce wa matsaloli irin su sagging da goga a cikin fim din fenti.
Haƙuri na gishiri: HEC yana da ɗan haƙuri ga electrolytes, don haka har yanzu yana iya kula da kyakkyawan aiki a cikin abubuwan da ke ɗauke da gishiri ko wasu electrolytes.
2. Tsarin aikin hydroxyethyl cellulose a cikin launi na latex
A matsayin thickener da stabilizer, babban tsarin aiki na hydroxyethyl cellulose a cikin latex Paint za a iya yin nazari daga wadannan abubuwa:
(1) Tasiri mai kauri
HEC yana narkar da sauri cikin ruwa kuma yana samar da bayani mai haske, mai danko. Ta hanyar samar da haɗin gwiwar hydrogen tare da kwayoyin ruwa, kwayoyin HEC suna buɗewa kuma suna ƙara danko na maganin. Ta hanyar daidaita adadin HEC, ana iya sarrafa danko na fenti na latex daidai don cimma kyakkyawan aikin gini. Sakamakon thickening na HEC kuma yana da alaƙa da nauyin kwayoyin sa. Gabaɗaya, mafi girman nauyin kwayoyin halitta, mafi mahimmancin tasirin kauri.
(2) Tasirin daidaitawa
Akwai adadi mai yawa na emulsion, pigments da filler a cikin fenti na latex, kuma hulɗar tsakanin waɗannan abubuwan na iya faruwa, yana haifar da lalata ko hazo na fenti na latex. A matsayin colloid mai karewa, HEC na iya samar da ingantaccen tsarin sol a cikin lokacin ruwa don hana pigments da filler daga daidaitawa. Bugu da ƙari, HEC yana da juriya mai kyau ga canje-canje a cikin zafin jiki da ƙarfin ƙarfi, don haka zai iya tabbatar da kwanciyar hankali na fenti na latex a lokacin ajiya da ginawa.
(3) Inganta iya aiki
Ayyukan aikace-aikacen fenti na latex ya dogara da yawa akan abubuwan rheological. Ta hanyar kauri da inganta rheology, HEC na iya inganta aikin anti-sag na fenti na latex, yana ba shi damar yaduwa a kan saman tsaye kuma yana sa shi ƙasa da sauƙi. A lokaci guda kuma, HEC na iya tsawaita lokacin buɗewar fenti na latex, yana ba ma'aikatan gini ƙarin lokaci don yin gyare-gyare da rage alamar gogewa da alamun kwarara.
3. Yadda ake ƙara hydroxyethyl cellulose zuwa fenti na latex
Domin cikakken aiwatar da tasirin hydroxyethyl cellulose, madaidaicin hanyar ƙari yana da mahimmanci. Gabaɗaya magana, amfani da HEC a cikin fenti na latex ya haɗa da matakai masu zuwa:
(1) Pre-rushewa
Tun da HEC ya narke a hankali a cikin ruwa kuma yana da wuyar haɗuwa, yawanci ana bada shawara don narkar da HEC a cikin ruwa don samar da maganin colloidal uniform kafin amfani. Lokacin narkar da, ya kamata a ƙara HEC a hankali kuma a ci gaba da motsawa don hana haɓakawa. Kula da zafin jiki na ruwa a lokacin aikin rushewar yana da matukar muhimmanci. An ba da shawarar gabaɗaya don yin rushewa a zafin jiki na 20-30 ° C don guje wa yawan zafin jiki da ke shafar tsarin kwayoyin HEC.
(2) Ƙara oda
A cikin tsarin samar da fenti na latex, yawanci ana ƙara HEC a lokacin pulping mataki. Lokacin shirya fenti na latex, pigments da filler an fara tarwatsa su a cikin ruwa don samar da slurry, sa'an nan kuma ana ƙara HEC colloidal bayani a lokacin watsawa don tabbatar da cewa za'a iya rarraba shi daidai a cikin tsarin. Lokaci na ƙara HEC da ƙarfin motsa jiki zai shafi tasirinsa mai girma, don haka yana buƙatar daidaitawa bisa ga ƙayyadaddun bukatun tsari a cikin ainihin samarwa.
(3) Kula da sashi
Adadin HEC yana da tasiri kai tsaye akan aikin fenti na latex. Yawancin lokaci, adadin adadin HEC shine 0.1% -0.5% na yawan adadin latex fenti. Ƙananan HEC zai haifar da tasiri mai zurfi ya zama maras muhimmanci kuma fentin latex ya zama ruwa mai yawa, yayin da yawancin HEC zai haifar da danko ya zama mai girma, yana rinjayar aikin aiki. Sabili da haka, a cikin aikace-aikace masu amfani, adadin HEC yana buƙatar daidaitawa bisa ga ƙayyadaddun tsari da buƙatun gini na fenti na latex.
4. Aikace-aikacen misalai na hydroxyethyl cellulose a cikin latex fenti
A ainihin samarwa, HEC an yi amfani dashi sosai a cikin nau'ikan fenti na latex daban-daban, kamar:
Paint na bangon ciki na ciki: Abubuwan da ke daɗaɗawa da haɓakar ruwa na HEC suna ba shi damar haɓaka haɓakar haɓakawa da kaddarorin anti-sag na fim ɗin fenti a cikin bangon bangon latex na ciki, musamman a cikin yanayin zafi mai zafi inda har yanzu yana iya kula da kyakkyawan aiki.
Pain latex na bango na waje: kwanciyar hankali da juriya na gishiri na HEC yana ba shi damar inganta yanayin yanayi da juriya na tsufa a cikin bangon bango na waje da kuma tsawaita rayuwar sabis na fim ɗin fenti.
Anti-mildew latex fenti: HEC iya yadda ya kamata tarwatsa anti-mildew wakili a anti-mildew latex fenti da kuma inganta daidaito a cikin fenti fim, game da shi inganta anti-mildew sakamako.
A matsayin ingantacciyar ƙarar fenti na latex, hydroxyethyl cellulose na iya haɓaka aikin fenti na latex sosai ta hanyar kauri, riƙewar ruwa, da tasirin daidaitawa. A aikace-aikace masu amfani, fahimtar hanyar ƙarawa da adadin HEC na iya inganta haɓakawa da amfani da tasirin fenti na latex.
Lokacin aikawa: Oktoba-22-2024