Rufaffen kafa tsari

Rufe-forming tsari za a iya raba narke coalescence ta samar da wani shafi fim leveling matakai uku.

A yanayin zafi da aka ba da, ikon sarrafa narkar da coalescence mafi mahimmancin abu shine wurin narkewa na guduro, dankowar yanayin narkakkar foda da girman ɓangarorin foda. Domin mafi kyawun haɗin narkakkar za a yi da wuri-wuri, don samun lokaci mai tsawo don kammala tasirin kwararar lokaci. Amfani da wakili na warkarwa ya rage samuwa don gudana da daidaita lokacin da ake buƙata, don haka fim ɗin shafa wanda aka kafa na foda mai aiki sosai yakan gabatar da kwasfa na orange.

Mahimman abubuwan da suka shafi tasirin shafi da daidaitawa shine narke danko na resin, yanayin yanayin tsarin da kauri na fim. Bi da bi, narke danko, musamman ya dogara da curing zafin jiki, curing kudi da dumama kudi.

Daban-daban dalilai da aka ambata a sama, tare da barbashi size rarraba da fim kauri, yawanci ƙaddara da ake bukata film Properties da za a fentin abubuwa da foda yi yanayin yanke shawarar. Rufin foda kwarara da kuma daidaita ƙarfin wutar lantarki daga yanayin yanayin tsarin, an kuma ambaci wannan gaba. Ƙarfin da aka yi amfani da shi don jawo hankali tsakanin kwayoyin halitta a cikin fim din da aka saba da shi, sakamakon haka, irin su danko mai narkewa ya fi girma, mafi girma da juriya ga gudana da daidaitawa. Don haka, tashin hankali na saman, da girman kwayoyin bambanci tsakanin gravitational yana ƙayyade girman matakin matakin fim ɗin.

Don rufi tare da mai kyau mai gudana, a bayyane yake cewa tashin hankali na tsarin ya kamata ya kasance mai girma kamar yadda zai yiwu, kuma danko narke yana da ƙananan kamar yadda zai yiwu. Ana iya samun waɗannan ta hanyar ƙara abubuwan da ke daɗaɗɗa zuwa tashin hankali na tsarin za a iya inganta su da kuma yin amfani da ƙananan narkewa na resin ƙananan nauyin kwayoyin halitta.

Shafi-fasa tsari

Za a iya shirya sutura bisa ga yanayin da ke sama yana da kyawawan kaddarorin kwarara, amma saboda tsananin tashin hankali yana haifar da raguwa, saboda ƙarancin narkewar ɗanɗano zai haifar da sagging, da sasanninta Poor coatability. A cikin aiki mai amfani, tashin hankali da narke danko na tsarin ana sarrafa su a cikin wani takamaiman kewayon, don haka ana iya samun ingantaccen bayyanar farfajiya.

Ana nuna tasirin tashin hankali da narke danko na kwararar fim din mai rufi a cikin Hoto 2. Kamar yadda za a iya gani a cikin adadi, daɗaɗɗen daɗaɗɗen maɗaukaki ko maɗaukaki mai narkewa zai hana zubar da ruwa, sakamakon haka. wani shafi film matalauta flowability, da kuma surface tashin hankali ne ma high fim kafa tsari zai bayyana craters. Kwanciyar ma'ajiya ta jiki na dankowar ta yi ƙasa da ƙasa zai sa foda ya lalace Rashin kyawun ginin kusurwa, da ginin facade sagging.

A taƙaice, a bayyane yake, yanayin yanayin ƙarshe na fim ɗin da aka samu foda, lahani da ƙarancin (kamar kwasfa na orange, ƙarancin kwarara, craters, pinholes, da dai sauransu) suna da alaƙa da alaƙa da juna, kuma a cikin tsarin ƙaddamarwa da ke cikin canji lokaci a cikin rheological iko iko. The foda barbashi size rarraba kuma rinjayar da surface bayyanar da shafi fim. Ƙananan ƙananan ƙwayoyin cuta, ƙananan ƙananan ƙananan ƙananan saboda ƙarfin zafi, don haka lokacin narkewa ya fi guntu fiye da na manyan ƙwayoyin cuta, coalescents kuma da sauri, kuma mafi kyawun bayyanar fuskar fim ɗin an kafa. Large foda barbashi narkewa lokaci fiye da tsawon kananan barbashi, da shafi fim kafa a kan iya haifar da orange kwasfa sakamako. Hanyoyin gina foda na Electrostatic (fiɗawar korona ko fitarwar gogayya), amma kuma yana haifar da samuwar wani abu a cikin kwas ɗin orange.

Yadda za a rage ko guje wa tasirin bawon lemu don haɓaka kwarara da daidaitawa na iya rage ko guje wa bawon lemu. Tsarin yana amfani da ƙananan danko mai narkewa, ƙaddamar da lokaci mai tsawo da kuma tashin hankali mafi girma a cikin tsarin warkewa za a iya inganta kwararar ruwa da daidaitawa. A muhimmanci sigogi don sarrafa surface tashin hankali gradient an rage orange kwasfa, yayin da kuma sarrafa da surface tashin hankali na shafi fim surface ne uniform, domin samun mafi karami surface area.

Sau da yawa ana amfani da wakili mai haɓaka mai gudana ko mai daidaitawa a cikin ainihin aikin don inganta bayyanar sutura, don kawar da lahani na sama kamar peel orange, craters, pinholes. Kyakkyawan aiki na wakili mai haɓakawa mai gudana zai iya rage danko narke, don haka yana ba da gudummawa ga haɗuwa da narkewa da tarwatsa pigment, don inganta wettability na substrate, kwarara da kuma daidaitawar shafi, yana taimakawa wajen kawar da lahani na surface da kyau. don sauƙaƙe sakin iska.

Ya kamata a bincika sashi mai gyara kwarara da alaƙar tasiri. Rashin isashen adadin zai haifar da raguwa da bawon lemu, yawan amfani da shi zai haifar da asarar sheki, hazo, da haifar da matsalolin mannewa a sama. Yawanci, an ƙara mai gyara kwarara a cikin premix. Ko kuma an yi shi da babban batch ɗin guduro (guro da rabon ƙari na 9/1 zuwa 8/2), ko kuma ana tallata shi akan mai ɗaukar inorganic a cikin foda. Adadin abubuwan da aka ƙara a cikin fenti foda shine 0.5 zuwa 1.5% (a cikin Binders da aka ƙididdige ingantaccen polymer), amma a ƙananan ƙima na iya yin kyau.

Polyacrylate kwarara mai gyara resins mafi yawan amfani da su, irin su polyacrylic acid butyl ester ("Acronal 4F"), acrylic acid ethyl - ethyl hexyl acrylate copolymer da butyl acrylate - acrylic acid-hexyl acrylate copolymer, da dai sauransu.. Ana iya amfani da su a cikin wani sosai. fadi da maida hankali kewayon. Yawancin lokaci polyacrylate kadan sakamako a kan surface tashin hankali, za su iya taimaka wa shafi forming in mun gwada da m uniform surface. Idan aka kwatanta da waɗanda na saman tashin hankali rage Additives (kamar silicone ko makamancinsu), ba su rage saman tashin hankali, sabili da haka za a iya amfani da su kara da matakin. Rage tashin hankali saman abubuwan abubuwan da suka hada da abubuwan da suka hada da abubuwan da ke aiki a saman, abubuwan da aka yi amfani da su na alkyl esters, da silicone. Suna shiga adadin yana da matukar damuwa. Benzoin shine wakili na degassing, kuma yana da tasirin rage tashin hankali, ana amfani dashi ko'ina don inganta yanayin bayyanar fim ɗin da aka rufe na foda.

Rufaffen kafa tsari