Umbhobho yinxalenye ebalulekileyo yokupakisha iikhemikhali zemihla ngemihla, esetyenziswa kakhulu kwiinkalo zemveliso ezifana nekhrimu yesandla, iimveliso zokucoca, iimveliso zelanga njalo njalo. Iingubo zomphezulu wepayipi zemveli zizinto ezisetyenziswa kwi-polyurethane ezineenxalenye ezimbini ezinyibilikayo. Nangona iingubo ze-polyurethane ezineenxalenye ezimbini zisebenza kakuhle kakhulu ngokubhekiselele ekuguquguqukeni kwengubo kunye nokuprinta okwesibini (i-bronzing), ukusebenza kwazo kuphezulu njenge-80%. Umxholo we-VOCs ongentla uwenza ukuba uthintelwe ekusetyenzisweni, ngakumbi kwiminyaka yakutshanje, ngokuqiniswa okuqhubekayo kolwazi lokukhuselwa kwendalo kwilizwe kunye nabemi belizwe lethu, ukuveliswa kunye nokusetyenziswa kweengubo eziphezulu ze-VOCs kuphantsi kolawulo olungqongqo. Kufikelele kwisivumelwano sokuba iingubo zepayipi ezinobuhlobo nokusingqongileyo cindawo yengubo yendabuko ene-VOC ephezulu.
Okwangoku, iingubo ezisetyenziswayo ezinobuhlobo nokusingqongileyo ziquka: 1. Iingubo ezisekelwe emanzini ezinomxholo we-VOC ongaphantsi kwe-10%; 2. Iingubo eziqinileyo okanye iingubo eziqinileyo ezinomxholo oqinileyo ongaphezulu kwe-85%. Ekubeni izinto ezisetyenziswa kwipayipi yangoku ziyimpahla ye-polyethylene (PE), iimpawu zoxinzelelo oluphantsi lomphezulu kunye ne-polarity ephantsi yolu hlobo lwezinto zenza ukuba iingubo ezisekelwe emanzini zingabi naziindlela zokusetyenziswa ezivuthiweyo kwipayipi. Iingubo eziqinileyo ezinyangwa yi-UV (iingubo ezinyangwa yi-UV) ziye zaba lukhetho lokuqala lweengubo ezinobuhlobo nokusingqongileyo kwiipayipi kweli nqanaba ngenxa yokusebenza kwazo okuphezulu, ukonga amandla, kunye nokukhuselwa kokusingqongileyo. Nangona kunjalo, ngenxa yeempawu zeengubo ezinyangwa yi-UV, xa abantu besebenzisa iingubo ezinyangwa yi-UV ukuvelisa izinto zokupakisha zemibhobho yekhemikhali yemihla ngemihla, ngokubanzi baya kudibana neengxaki ezifana nokumelana nokuguga kokukhanya kwephepha, ukutyhelika lula, ukuqhekeka kwephepha, i-matte Ukumelana nokuguguleka okubi, ukuprinta okunzima kwesibini (i-bronzing), ivumba elingathandekiyo emva kokupeyinta, njl.njl.
Eli nqaku liza kuqala kwimigaqo esisiseko yokufakelwa kwe-UV, kunye nokusetyenziswa kwayo, kwaye liza kuxoxa nzulu ngeengxaki eziphambili ezikhankanyiweyo apha ngasentla kwinkqubo yokufakelwa kunye nokuhonjiswa kwesibini kwezinto zokupakisha zepayipi ezisetyenziswa kwiikhemikhali zemihla ngemihla. Ngokusekelwe ekuphuculeni ifomula yokufakelwa, ngokutsho kwemeko yokwenyani yomenzi wezinto zokupakisha unika izisombululo ezithile kwezi ngxaki.
Intshayelelo kwiingubo zokunyanga ze-UV
I-Photocuring yiteknoloji entsha "eluhlaza" ekhula ngokukhawuleza. Ukususela ngeminyaka yoo-1970, iteknoloji ye-photocuring isetyenziswa kakhulu kwiingubo, ii-inki, ii-arhente zokudibanisa kunye namacandelo ezonyango. Phakathi kwazo, iteknoloji ye-ultraviolet light curing (UV curing) okwangoku yeyona iteknoloji isetyenziswa kakhulu ekukhanyeni. Iingubo ze-UV zenziwe ikakhulu zii-photoinitiators, ii-resin ezingagcwaliyo kunye nee-monomers, izongezo zokulawula umphezulu kunye nee-pigment ezifunekayo kunye nezizalisi. Kwicandelo lokuhombisa umphezulu wezinto zokupakisha zekhemikhali zemihla ngemihla, iteknoloji ye-UV curing isetyenziswa kakhulu ekutshizeni, ekuprinteni nakwezinye iindawo. Kwingubo yezixhobo zokupakisha zekhemikhali zemihla ngemihla, iingubo ezinyangwa yi-UV zibonakaliswa kukukhanya okukhawulezayo, ukukhanya okuphezulu komphezulu, ukumelana okuhle kokukrwela, kunye nomxholo ophezulu oqinileyo. Njengesixhobo sokugcoba esikhulayo esinobuhlobo nokusingqongileyo, kwiminyaka yakutshanje ingqalelo yabantu abaninzi ngakumbi.
Nangona kunjalo, njengayo nayiphi na enye into, ii-UV coating ezinyangekayo nazo zineengxaki ezifana nokutyheli, ukuqhekeka, kunye nokumelana nokuguguleka okungalunganga ngexesha lokusetyenziswa. Eli nqaku liza kugxila ekuxoxeni ngeengxaki ezahlukeneyo eziqhelekileyo zee-UV coating ezisetyenziswa kwiipayipi. , ukuqala kwizizathu zeengxaki, chaza iindlela zokusombulula ezi ngxaki ukusuka kuyilo lwefomula yokugquma ukuya kwinkqubo yokwakha i-coating.
Iingxaki eziphambili kunye nezisombululo xa kusetyenziswa ii-UV coating coats kwizixhobo zokupakisha zemihla ngemihla zekhemikhali
一. Izizathu kunye nezisombululo zokutyheli
Isizathu esiphambili sokuba ii-UV-cured coatings zibe tyheli kukuba i-coatment inezakhiwo ze-molecular ezinokufunxa ukukhanya kwe-ultraviolet kwe-wavelength ethile. Emva kokufunxa ukukhanya kwe-ultraviolet kwe-wavelength ethile, ezi zinto zivelisa utshintsho lwamandla kwaye ekugqibeleni zibangele i-oxidation ye-coat. Xa i-oxidation ingekho phezulu, iya kuba tyheli ngembonakalo, eyaziwa ngokuba yi-"yellowing".
(Umfanekiso wasekhohlo - into etyheli, umfanekiso wasekunene - oqhelekileyo)
Izinto eziphambili kwiingubo ze-UV ezinokufunxa ukukhanya kwe-ultraviolet zezi:
1. Intsalela ye-Photoinitiator (le yeyona nto ibalulekileyo ebangela ukuba tyheli)
2. Ulwakhiwo lwemolekyuli olunemisebenzi ye-UV (le nxalenye yengubo ye-UV ikakhulu yinto equlethe isakhiwo sendandatho ye-benzene kwi-resin ye-UV okanye i-monomer)
3. Iibhondi ezingakagayiwayo eziseleyo, kunye nezinye izinto ezikwaziyo ukuxovwa lula (ezifana namaqela e-amino, njl.njl.)
Izizathu kunye nezisombululo zokuqhekeka kwengubo
Izizathu eziphambili zokugoba nokuqhekeka kwengubo: 1. Ukunamathela kwengubo kwi-substrate akulunganga; 2. Ukwandiswa kwengubo xa iqhekeka kuphantsi emva kokunyibilika. Intetho edumileyo ithi ukuqina kwengubo akulunganga.
Izisombululo zokuqhekeka kwengubo:
1. Ukuqala kuyilo lwefomula, bonelela ngeengubo ezinamathelayo neziqinileyo;
2. Ukusuka kulawulo lwenkqubo yokugquma, iindlela ezithile zezi: 1. Unyango lwangaphambi kwesiseko, olufana nelangabi, i-corona kunye nezinye iindlela zonyango kwisiseko okanye unyango lwangaphambi kwesixhobo sokugquma, ukwandisa i-polarity yomphezulu wesiseko kunye nokuphucula umgangatho wesiseko. 2. Ngexesha lenkqubo yokugquma, ubukhulu bokugquma kufuneka buncitshiswe ngokufanelekileyo, kwaye ubushushu bokugquma kunye namandla okugquma kwe-UV kufuneka kwandiswe.
Izizathu kunye nezisombululo zevumba elibi
Umbhobho ogqunyiweyo uya kunuka ivumba elibi xa imveliso ibekwe, ingakumbi ukuba imveliso ivalwe kwingxowa yokupakisha ixesha elide, xa ingxowa yokupakisha ivuliwe. Isizathu esiphambili sale vumba libi kukuba iikhompawundi ezincinci zemolekyuli ezibila kancinci ezisele kwifilimu yokupenda ziyafudukela kumphezulu wengubo ngokuhamba kwexesha, zivuthuluke emoyeni, kwaye ziqokeleleke rhoqo kwindawo evaliweyo. Imithombo yezi khompawundi zincinci zemolekyuli ezibila kancinci ikakhulu zii-residual solvents (i-solvents ezingavuthuluki ngokupheleleyo), ii-residual small molecular monomers (i-incomplete curing), kunye neekhompawundi ezincinci zemolekyuli eziveliswa zii-photoinitiators kunye nokuqhekeka kwazo (ezaziwa ngokuba zii-initiator residues).
Iindlela zokusombulula ivumba emva kokunyanga:
1. Ukuqala kuyilo lwefomyula, sebenzisa inkqubo yokuqalisa esebenza kakhulu ukunciphisa ubungakanani be-initiator esetyenzisiweyo; ukwandisa umxholo wezinto ezininzi ezisebenzayo kwinkqubo, kwaye usebenzise izinto ezifanelekileyo zokufaka iplastiki ukunciphisa ubungakanani be-monomers ezincinci ze-molecule, ingakumbi ii-molecule ezincinci ze-monofunctional. Ukusetyenziswa kwe-monomer.
2. Ngokwembono yolawulo lwenkqubo yokugquma, ukunciphisa ngokufanelekileyo ubukhulu bokugquma, ukunyusa ubushushu bokugquma, kunye namandla okugquma e-UV kunokunciphisa ukuveliswa kwevumba elibi.
Izizathu kunye nezisombululo zokunganyamezelani kakuhle kwemibhobho ye-matte
Isizathu sokunganyamezelani kakuhle nokukrwela kwe-matte coating kukuba isiphumo se-matte sokwambathisa siveliswa kakhulu kukubonakaliswa okusasazekayo komphezulu wokugquma ekukhanyeni, kwaye ukubonakaliswa okusasazekayo komphezulu wokugquma kubangelwa kakhulu buburhabaxa bomphezulu wokugquma kunye nomphezulu wokugquma. Ukungahambelani komaleko ngokwawo kuvela. Xa umphezulu orhabaxa ukhuhlwe, kuya kuzisa ukungqubana okukhulu, okubangela ukuba i-coating ibe lula ukukrwela kunomphezulu okhanyayo. Ukongeza, izinto eziphuma kwi-matte coating ziya kutshabalalisa ukuthembeka komphezulu wokugquma ukuya kwinqanaba elithile, eliyenye yezizathu zokuba i-matte coating inokuba lula ukukrwela kune-glossy coating.
(Ityhubhu engacwebezelayo kulula ukuyikrwela kwaye ijike ibe mhlophe xa ikhuhliwe)
Izisombululo zokukrweleka:
1. Ukususela kuyilo losasazo, ukusebenzisa inxalenye ye-matte resin ukutshintsha izinto zepowder kwipeyinti kunokunciphisa uburhabaxa bomphezulu wokugquma kunye nokwandisa umlinganiselo we-pigment-base wokugquma phantsi kwesiseko sokuqinisekisa i-matte degree yokugquma, kwaye ekugqibeleni kufezekiswe. Kuphucula ukumelana nokukrwela kwemiphezulu egqunywe yi-matt.
2. Ukuqala kulawulo lwenkqubo yokugquma, ukunciphisa ngokufanelekileyo ubukhulu bokugquma, ukwandisa ubushushu bokugquma, kunye namandla okugquma e-UV kunokuphucula ukumelana nokukrwela komphezulu wokugquma ongamatte.
Oku kuthetha. Izizathu kunye nezisombululo zokusebenza kakubi kwe-hot stamping
Izizathu eziphambili zokusebenza kakubi kwe-hot stamping zezi: 1. I-coating ayifani nephepha le-hot stamping, nto leyo ebangela ukuba i-hot stamping ingaphelelanga okanye i-adhesive engafanelekanga; Okwesibini, ulawulo lwenkqubo ngexesha le-hot stamping aluzinzanga.
Izisombululo zokunyathela kakubi kwe-hot stamping:
1. Ngokwembono yokwenziwa, iWeixi Chemical ngobuchule ingenisa izinto ezineempawu ezibuthathaka kubushushu kwifomyula. Ezi zinto zinobunzima obuphezulu kunye noxinzelelo oluphantsi kumphezulu kubushushu begumbi, kodwa xa ubushushu bufikelela okanye budlula ubushushu balo botshintsho lwesigaba, Olu hlobo lwezinto ludlula kutshintsho lwesigaba kunye nokwehla okukhulu kobunzima obuhamba kunye nokwanda koxinzelelo lomphezulu. Ngexesha lenkqubo yokunyathela okushushu, ekubeni ubushushu benxalenye yokunyathela okushushu bunyuka ngokukhawuleza ngaphezu kobushushu botshintsho lwesigaba sento, ubunzima benxalenye yokunyathela okushushu buyancipha kakhulu kwaye uxinzelelo lomphezulu luyanda, ngaloo ndlela kuphucula ukunamathelana phakathi kwephepha lokunyathela elishushu kunye nophahla kunye nokuthembeka kokunyathela okushushu. Xa inkqubo yokuxubha igqityiwe, ubushushu buyehla ngaphantsi kobushushu botshintsho lwesigaba kwaye ubunzima bophahla buyabuya.
2. Ngokwembono yolawulo lwenkqubo, nika kuqala ukukhetha iphepha le-bronzing kunye nenkqubo ehambelana nopende, kwaye wonyuse ngokufanelekileyo ubushushu be-bronzing kunye namandla okucinezela ngexesha le-bronzing, nto leyo enceda ekuphuculeni ukuthembeka kunye nokunamathela kwe-bronzing.
I-varnish yepayipi ye-PE yohlobo lwe-UV iya kuthatha indawo ye-polyurethane coating enamacandelo amabini kancinci kancinci. Yimveliso yokhuseleko lwesizwe, imveliso ecocekileyo, ukunciphisa ukukhutshwa kwekhabhoni, kunye neemfuno zokhuseleko lokusingqongileyo. Ezinye iingxaki ezivelayo ngexesha lokwakhiwa kwe-varnish ye-UV zinokusonjululwa nge-varnish. Ukulungiswa kwefomyula yomenzi, ukulungiswa kwenkqubo yomenzi wezixhobo kunye nomzi-mveliso wepayipi zisonjululwa ngokubambisana.
IShanghai Rainbow Industrial Co., Ltd.ibonelela ngesisombululo esinye sokupakisha ubuhle. Ukuba uyayithanda imveliso yethu, ungaqhagamshelana nathi,
Iwebhusayithi:www.rainbow-pkg.com
Email: Bobby@rainbow-pkg.com
I-WhatsApp: +008615921375189
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）技术是目前应用最為广泛的光固化技术。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，做为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.
Ixesha lokuthumela: Jan-06-2023