Ipayipi liyingxenye ebalulekile yokupakisha kwamakhemikhali nsuku zonke, esetshenziswa kabanzi emikhakheni yemikhiqizo efana nokhilimu wesandla, imikhiqizo yokuhlanza, imikhiqizo yelanga njalonjalo. Izembozo zendabuko zomphezulu wepayipi ziyizembozo ze-polyurethane ezisekelwe ku-solvent ezinezingxenye ezimbili. Nakuba izembozo ze-polyurethane ezinezingxenye ezimbili zisebenza kahle kakhulu maqondana nokuguquguquka kwezembozo kanye nokunyathelisa kwesibili (ukugcoba), ukusebenza kwazo kuphakeme njengo-80%. Okuqukethwe kwe-VOC okungenhla kwenza kube nomkhawulo ekusetshenzisweni, ikakhulukazi eminyakeni yamuva nje, ngokuqiniswa okuqhubekayo kokuqwashisa ngokuvikelwa kwemvelo kwezwe kanye nezakhamuzi ezweni lethu, ukukhiqizwa nokusetshenziswa kwezembozo ze-VOC ezinokuqukethwe okuphezulu kungaphansi kokubhekwa okuqinile. Kufinyelele esivumelwaneni sokuthi izembozo zepayipi ezinobungani nemvelo cukufaka esikhundleni sezingubo zendabuko eziphezulu ze-VOC.
Njengamanje, izembozo ezinobungani nemvelo eziqashelwayo zifaka: 1. Izembozo ezisekelwe emanzini ezinokuqukethwe kwe-VOC okungaphansi kuka-10%; 2. Izembozo eziqinile noma izembozo eziqinile ezigcwele okuqukethwe okuqinile okungaphezu kuka-85%. Njengoba izinto eziyisisekelo sepayipi lamanje ziyizinto ze-polyethylene (PE), izici zokucindezeleka okuphansi kobuso kanye ne-polarity ephansi yalolu hlobo lwezinto zenza izembozo ezisekelwe emanzini zingabi nazimpawu zokusetshenziswa ezivuthiwe ekumbozweni kwepayipi. Izembozo eziqinile ezingelapheka nge-UV (zembozo ezingelapheka nge-UV) sezibe ukukhetha kokuqala kwezembozo ezinobungani nemvelo zamapayipi kulesi sigaba ngenxa yokusebenza kahle kwazo okuphezulu, ukonga amandla, kanye nokuvikelwa kwemvelo. Kodwa-ke, ngenxa yezici zezembozo ezingelapheka nge-UV, lapho abantu besebenzisa izembozo ezingelapheka nge-UV ekukhiqizeni izinto zokupakisha zamapayipi amakhemikhali nsuku zonke, ngokuvamile bazobhekana nezinkinga ezifana nokumelana nokuguga kokukhanya okuncane kwesembozo, ukuphuzi okulula, ukuqhekeka kwesembozo, i-matte Ukumelana nokuguguleka okubi, ukuphrinta okunzima kwesibili (i-bronzing), iphunga elibi ngemva kokupenda, njll.
Lesi sihloko sizoqala ngezimiso eziyisisekelo zokugqoka nge-UV, kuhlanganiswe nokusetshenziswa kwangempela, futhi sixoxe ngokujulile ngezinkinga ezinkulu ezishiwo ngenhla enqubweni yokugqoka kanye nokuhlobisa okwesibili kwezinto zokupakisha zepayipi ezisetshenziswa kumakhemikhali ansuku zonke. Ngokusekelwe ekwenzeni ngcono ifomula yokugqoka, ngokusho kwesimo sangempela somkhiqizi wezinto zokupakisha sinikeza izixazululo ezithile zalezi zinkinga.
Isingeniso Sokumboza Nge-UV
I-Photocuring ubuchwepheshe obusha "obuluhlaza" obukhula ngokushesha. Kusukela ngawo-1970, ubuchwepheshe be-photocuring busetshenziswe kabanzi ekumbozeni, kuyinki, kuma-ejenti okuxhumanisa kanye nasezindaweni zezokwelapha. Phakathi kwazo, ubuchwepheshe be-ultraviolet light curing (UV curing) njengamanje buyindlela yobuchwepheshe yokukhanyisa esetshenziswa kakhulu. I-UV coating yakhiwe kakhulu ngama-photoinitiators, ama-resin angagcwalisiwe nama-monomers, izithasiselo zokulawula ubuso kanye nama-pigment adingekayo kanye nama-filler. Emkhakheni wokuhlobisa ubuso bezinto zokupakisha zamakhemikhali zansuku zonke, ubuchwepheshe be-UV curing busetshenziswa kakhulu ekufutheni, ekunyatheliseni nakwezinye izindawo. Ekumbozeni izinto zokupakisha zamakhemikhali zansuku zonke, i-UV-treated coating ibonakala ngokupholisa okusheshayo, ukukhanya okuphezulu kobuso, ukumelana okuhle kokuklwebheka, kanye nokuqukethwe okuphezulu okuqinile. Njengezinto zokugqoka ezinobungani nemvelo, eminyakeni yamuva nje abantu abaningi bayanakwa.
Kodwa-ke, njenganoma iyiphi enye into, izembozo ezilaphekayo nge-UV nazo zinezinkinga ezifana nokuphuzi, ukuqhekeka, kanye nokumelana nokuguguleka okungekuhle ngesikhathi sokusetshenziswa. Lesi sihloko sizogxila ekuxoxeni ngezinkinga ezahlukahlukene ezivamile zezembozo ze-UV ezisetshenziswa kumapayipi. , kusukela ezimbangini zezinkinga, beka phambili izindlela zokuxazulula lezi zinkinga kusukela ekwakhiweni kwefomula yezembozo kuya enkambisweni yokwakha izembozo.
Izinkinga ezinkulu kanye nezixazululo lapho kufakwa khona izembozo ze-UV ezisetshenziswa ezintweni zokupakisha zansuku zonke zamapayipi amakhemikhali
一. Izimbangela nezixazululo zokushintsha umbala ube phuzi
Isizathu esiyinhloko sokuphuzi kwezingubo eziqiniswe yi-UV ukuthi ingubo iqukethe izakhiwo zama-molecule ezingamunca ukukhanya kwe-ultraviolet kobude besikhathi obuthile. Ngemva kokumunca ukukhanya kwe-ultraviolet kobude besikhathi obuthile, lezi zinto zikhiqiza ukuguquka kwezinga lamandla futhi ekugcineni zibangele ukushiswa kwengubo. Uma izinga lokushiswa kwe-oxidation lingekho phezulu, lizophenduka liphuzi ngokubukeka, okuvame ukubizwa ngokuthi “ukuphuzi”.
(Isithombe sesobunxele - into ephuzi, isithombe sesokudla - evamile)
Izingxenye eziyinhloko ze-UV coating ezingamunca ukukhanya kwe-ultraviolet yilezi:
1. I-Photoinitiator residue (lena yinto ebaluleke kakhulu ebangela ukuphuzi)
2. Isakhiwo sama-molecule esiqukethe umsebenzi we-UV (le ngxenye yengubo ye-UV ngokuyinhloko iyinto equkethe isakhiwo sendandatho ye-benzene ku-resin ye-UV noma i-monomer)
3. Izibopho ezingakagcwali ezingakapheleli, nezinye izinto ezikwazi ukubola kalula (njengamaqembu ama-amino, njll.)
Izimbangela nezixazululo zokuqhekeka kokumboza
Izizathu eziyinhloko zokugoba nokuqhekeka kwesembozo: 1. Ukunamathela kwesembozo ku-substrate akukuhle; 2. Ukunwebeka lapho isembozo siphuka kuphansi ngemva kokuphola. Isisho esidumile sithi ukuqina kwesembozo akukuhle.
Izixazululo zokuqhekeka kwengubo:
1. Kusukela ekwakhiweni kwefomula, nikeza izembozo ukunamathela okungcono nokuqina;
2. Kusukela ekulawulweni kwenqubo yokumboza, izindlela ezithile yilezi: 1. Ukwelashwa kwangaphambili kwe-substrate, njengolangabi, i-corona kanye nokunye ukwelashwa ku-substrate noma ukwelashwa kwangaphambili kwe-ejenti yokwelapha ngaphambi kokumboza, ukwandisa i-polarity ebusweni be-substrate nokuthuthukisa ikhwalithi ye-substrate. 2. Ngesikhathi senqubo yokumboza, ukujiya kokumboza kufanele kuncishiswe ngokufanele, futhi izinga lokushisa lokumboza kanye namandla okumboza i-UV kufanele kwandiswe.
Izimbangela nezixazululo zephunga elibi
Ipayipi elimboziwe lizonuka iphunga elibi kakhulu lapho umkhiqizo ubekwa, ikakhulukazi uma umkhiqizo uvaliwe esikhwameni sokupakisha isikhathi eside, lapho isikhwama sokupakisha sivulwa. Isizathu esiyinhloko salezi phunga elibi kakhulu ukuthi izinhlanganisela ezincane zama-molecule ezibila kancane ezisele efilimini yopende ziyathuthela ebusweni bengubo ngokuhamba kwesikhathi, ziguquguquke emoyeni, futhi ziqongelela njalo endaweni evaliwe. Imithombo yalezi zinhlanganisela ezincane zama-molecule ezibila kancane ikakhulukazi izinyibilikisi ezisele (izinyibilikisi ezingaguquguquki ngokuphelele), ama-monomer amancane ama-molecule asele (ukwelapha okungaphelele), kanye nezinhlanganisela ezincane zama-molecule ezikhiqizwa ama-photoinitiators kanye nokuqhekeka kwawo (okwaziwa kakhulu ngokuthi izinsalela zokuqala).
Izindlela zokuxazulula iphunga ngemva kokupholisa:
1. Kusukela ekwakhiweni kokwakheka, sebenzisa uhlelo lokuqalisa olusebenza kakhulu ukunciphisa inani lokuqalisa olusetshenziswayo; wandise okuqukethwe kwezingxenye eziningi ezisebenzayo ohlelweni, bese usebenzisa izingxenye ezifanele zokufaka ipulasitiki ukunciphisa inani lama-monomer amancane e-molecule, ikakhulukazi ama-molecule amancane asebenza nge-monomer. Ukusetshenziswa kwe-monomer.
2. Ngokombono wokulawula inqubo yokumboza, ukunciphisa ngokufanele ukujiya kokumboza, ukwandisa izinga lokushisa lokumboza, kanye namandla okumboza nge-UV kunganciphisa ukukhiqizwa kwephunga elibi.
Izizathu nezixazululo zokumelana kahle nokuklwebheka kwepayipi eli-matte
Isizathu sokumelana nokuklwebheka okungekuhle kwe-matte coating ukuthi umphumela we-matte we-coating ukhiqizwa kakhulu ukubonakaliswa okusabalele kobuso be-coating ekukhanyeni, kanti ukubonakaliswa okusabalele kobuso be-coating kubangelwa kakhulu ubulukhuni bobuso be-coating kanye nobuso be-coating. Ukungafani kwesendlalelo ngokwaso kuvela. Uma ubuso obusangene buhlikihlwa, kuzoletha ukungqubuzana okukhulu, okwenza i-coating ibe lula kakhulu ukuklwebheka kunobuso obukhazimula kakhulu. Ngaphezu kwalokho, izinto eziwuphuphu eziku-matte coating zizobhubhisa ubuqotho bobuso be-coating ngezinga elithile, okungenye yezizathu ezenza i-matte coating ikwazi ukuklwebheka kunobuso obukhazimulayo.
(Ishubhu elingacwebezeli kulula ukuklwebha futhi liphenduke libe mhlophe uma lihlikihlwa)
Izixazululo zokuklwebheka:
1. Kusukela ekwakhiweni kokusatshalaliswa, ukusebenzisa ingxenye ye-resin ye-matte ukufaka esikhundleni sezingxenye zempuphu kupende kunganciphisa ubulukhuni bendawo yokumboza futhi kwandise isilinganiso se-pigment-base sengubo ngaphansi kwesisekelo sokuqinisekisa izinga le-matte lengubo, futhi ekugcineni kufezwe. Kuthuthukisa ukumelana kokuklwebheka kwezindawo ezimbozwe nge-matt.
2. Kusukela ekulawulweni kwenqubo yokumboza, ukunciphisa ngokufanele ubukhulu bokumboza, ukwandisa izinga lokushisa lokumboza, kanye namandla okumboza nge-UV kungathuthukisa ukumelana kokuklwebheka kobuso bokumboza obungamatte.
Izizathu nezixazululo zokusebenza kabi kwe-hot stamping
Izizathu eziyinhloko zokusebenza kabi kokunyathela okushisayo yilezi: 1. Isembozo asifani nephepha lokunyathela okushisayo, okuholela ekunyatheleni okushisayo okungaphelele noma ukunamathela okubi; Okwesibili, ukulawulwa kwenqubo ngesikhathi sokunyathela okushisayo akuzinzile.
Izixazululo zokunyathela okushisayo okungekuhle:
1. Ngokombono wokwakheka, i-Weixi Chemical ngobuhlakani ifaka izinto ezinezakhiwo ezizwela izinga lokushisa ekwakhiweni. Izinto ezinjalo zinobulukhuni obuphezulu kanye nobunzima obuphansi bomphezulu ekushiseni kwegumbi, kodwa lapho izinga lokushisa lifinyelela noma lidlula izinga lokushisa lokuguquka kwesigaba, Lolu hlobo lwezinto ludlula ekushintsheni kwesigaba ngokuncipha okukhulu kobulukhuni okuhambisana nokwanda kobunzima bomphezulu. Ngesikhathi senqubo yokunyathela okushisayo, njengoba izinga lokushisa lengxenye yokunyathela okushisayo likhuphuka ngokushesha ngaphezu kwezinga lokushisa lokuguquka kwesigaba lento, ubulukhuni bengxenye yokunyathela okushisayo buncishiswa kakhulu futhi ukucindezeleka komphezulu kuyanda, ngaleyo ndlela kuthuthukiswe ukunamathelana phakathi kwephepha lokunyathela elishisayo kanye nokugqoka kanye nobuqotho bokunyathela okushisayo. Lapho inqubo yokubumba isiqediwe, izinga lokushisa lehla ngaphansi kwezinga lokushisa lokuguquka kwesigaba futhi ubulukhuni bokunyathela buyabuya.
2. Ngokombono wokulawula inqubo, nikeza kuqala ukukhetha iphepha le-bronzing kanye nenqubo ehambisana nopende, futhi wandise ngokufanele izinga lokushisa le-bronzing kanye namandla okucindezela ngesikhathi se-bronzing, okusiza ekuthuthukiseni ubuqotho kanye nokunamathela kwe-bronzing.
I-varnish yepayipi le-PE yohlobo lwe-UV izothatha indawo kancane kancane yezingubo ze-polyurethane ezinezingxenye ezimbili. Iwumkhiqizo wokuphepha kazwelonke, ukukhiqizwa okuhlanzekile, ukunciphisa ukukhishwa kwekhabhoni, kanye nezidingo zokuvikela imvelo. Ezinye izinkinga ezivela ngesikhathi sokwakhiwa kwe-varnish ye-UV zingaxazululwa nge-varnish. Ukulungiswa kwefomula yomenzi, ukulungiswa kwenqubo yomenzi wemishini kanye nefektri yepayipi kuxazululwa ngokubambisana.
I-Shanghai Rainbow Industrial Co., Ltd.inikeza ikhambi elilodwa lokupakisha izimonyo. Uma uthanda imikhiqizo yethu, ungaxhumana nathi,
Iwebhusayithi:www.uthingo-pkg.com
Email: Bobby@rainbow-pkg.com
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光固化是一种快速发展的“绿色”新技术，从20世纪70年代至今，光固化技术已广泛应于涂料，油墨，交联剂以及医疗等领域。其中紫外光固化（UV固化）技术是目前应用最为广泛的光固化技术。UV涂料主要由光引发剂、不饱和树脂及单体、表面控制助剂以及必要的颜填料组成。在日化包装材料表面装饰领域，UV固化技术被广泛应用于喷涂，印刷等领域。在日化软管包装材料涂装中，UV固化涂料以其快速固化、表面光泽高、耐刮擦性能优异、固含量高的特点，做為一种新兴的环境友好型涂装材料，近年來越來越引起人們的关注.
然而，同其他任何材料一樣，UV固化涂料在使用过程中也会存在诸如黄变、开裂、哑光耐磨性差等问题，本文将重点就应用于软管的UV涂料常见的各种问题进行讨论，从问题产生的原因出发，提出从涂料配方设计到涂料施工过程的解决這些问题的方法.
Isikhathi sokuthunyelwe: Jan-06-2023