Indlela Yokunciphisa Iphunga ku-UV Flexo Inks nge-LED Curing

Ukufunda ukuthi ungayigwema kanjani iphunga kuma-UV flexo inks ngokuphulukisa kwe-LED kubalulekile kubaguquli ababhekise ezimakethe ezibucayi ezifana nokudla nokupakisha kwemithi.

Ezweni lokuncintisana lokuphrinta kwe-flexographic, abanikazi bemikhiqizo baya ngokuya bengabekezeleli "i-off-gassing" noma iphunga lamakhemikhali kumalebula abo. Bengilokhu ngisezitebhisini zokucindezela lapho umqulu omusha wamalebula unuka njengesethi yamakhemikhali—ukwenqatshwa okuqinisekisiwe okuvela kunoma yimuphi umcwaningi wezincwadi zokuphepha kokudla. Ukushintshwa kobuchwepheshe be-LED akugcini nje ngokulondolozwa kwamandla; Lena yindlela ephumelela kunazo zonke yokunciphisa lezi zingozi zezinzwa. Ngokulawula i-polymerization nokuqeda i-ozone, ungathola umkhiqizo ongathathi hlangothi, ohambisana kakhulu.

Ngezansi umhlahlandlela ophelele wokuqonda ukukhiqizwa okungenaphunga usebenzisa ubuchwepheshe be-LED UV.

Yini ebangela iphunga kuma-UV flexo inks?

Izimbangela eziyinhloko zephunga kuma-inki we-UV flexo ngama-monomers angaphenduliwe abanjwe kwifilimu yeyinki, imikhiqizo ye-photolytic evela kuma-photoinitiators, kanye nesizukulwane se-ozone esivela ezibani ezijwayelekile ze-mercury. Ngaphezu kwalokho, ukushisa ngokweqile kungabangela ukuthi ama-substrates akhiphe ama-plasticizers awo, abe nomthelela "kungcola" okuphelele noma iphunga lomkhiqizo wokugcina ophrintiwe.

The Chemistry of the Smell

Ukuze sikwazi ukuxazulula le nkinga, kufanele siqale siqonde isitha. Ekuhlangenwe nakho kwami ukuxazulula izinkinga zekhwalithi, "iphunga" akuvamile ukuthi livela emthonjeni owodwa kuphela. Kuyinto umphumela compound.

• Ama-Monomers angalapheki: Ama-inki we-UV ayizinhlelo eziqinile eziyi-100%. Uma amandla e-UV engaphenduli kuwo wonke ama-molecule owodwa, ushiywe nama-monomers wamahhala. La ma-molecule amancane ayaguquguquka futhi yinombolo yokuqala yalelo phunga elibukhali, lamakhemikhali.
• Ama-Photoinitiators (PIs): Ama-photoinitiators ajwayelekile angahlukaniswa abe yimikhiqizo (njenge-benzaldehyde) enephunga elihlukile le-alimondi noma elishisiwe. Yingakho ama-inki ajwayelekile angalokothi anconywe ekusetshenzisweni kwephunga eliphansi.
• Ukuvinjelwa kwe-oksijini: I-oksijini emoyeni iyi-bullition; intshontsha amandla ahloselwe ukuphulukisa ubuso beyinki. Lokhu kushiya ungqimba olungaphezulu "lwe-tacky" olucebile ngamakhemikhali angaphenduliwe akhipha igesi ngokuhamba kwesikhathi.

How does LED curing reduce smell compared to mercury lamps?

Ukuphulukiswa kwe-LED kunciphisa iphunga ngokuqeda isizukulwane se-ozone futhi kunciphise kakhulu ukudluliswa kokushisa ku-substrate. Ngokungafani nezibani ze-mercury ezihlasela iwebhu ngokushisa kwe-infrared, izinhlelo ze-LED zinikeza "ukwelashwa okubandayo" okuvimbela ukukhishwa kwephunga kusuka kumafilimu azwela ukushisa, kuyilapho ubude bawo obuncane buqinisekisa ukungena okujulile kokwelashwa okuphelele.

The "Cold Cure" Advantage

Ngikhumbula iphrojekthi ebandakanya ifilimu encane lapho izibani ze-mercury zazipheka khona i-substrate. Le filimu ayizange ihlanekezele kuphela; Kwakunuka njengepulasitiki eshisiwe. Ukushintshela ku-UV LED Curing for Flexo & Labels ixazulule lokhu ngokushesha.

• Ayikho i-ozone: Izibani ze-mercury zikhiqiza i-ozone (O3), enephunga elimnandi, elifana ne-bleach futhi eliyingozi empilweni ye-opharetha. Izibani ze-LED zikhipha amandla e-UV-A (imvamisa i-395nm) engakhiqizi i-ozone, ngokushesha ithuthukise ikhwalithi yomoya yegumbi lokucindezela.
• Ukuqhathanisa kwe-Spectral: Ama-inki we-LED aklanyelwe ukusabela ngokuqondile ekukhiqizeni okuncane kwama-chips e-LED. Lokhu kusebenza kahle kuvame ukuholela ezingeni eliphakeme lokuxhumanisa ngokujulile ngaphakathi kongqimba lweyinki, ukubamba abafuduki abangaba khona ngaphakathi kwenethiwekhi ye-polymer ukuze bangakwazi ukukhipha iphunga.

Iyini indima ye-nitrogen inerting ekunciphiseni iphunga?

I-nitrogen inerting inciphisa kakhulu iphunga ngokuhambisa i-oksijini endaweni yokuphulukisa, okuvumela amazinga aphezulu okuguqulwa kwama-photoinitiators nama-monomers. Ngokudala indawo engenawo umoya-mpilo, amaphrinta angafinyelela ukwelashwa okuphelele komhlaba ngaphandle kokusebenzisa ama-photoinitiators ngokweqile, ukunciphisa ngokuqondile amathuba emikhiqizo yamakhemikhali kanye nephunga elisele ephrintiweni lokugcina.

Ukunqoba i-Oxygen Inhibition

Uma ukhathazekile ngephunga le-zero, i-nitrogen ingumngane wakho omkhulu. Ekwelapheni okujwayelekile, i-oksijini ivimbela ukwelashwa ku-micron ephezulu kakhulu ye-inki. Ukulwa nalokhu, abakhiqizi be-inki kufanele balayishe inki ngama-photoinitiators angeziwe.

Kodwa-ke, uma umboza indawo yokuphulukisa nge-nitrogen, ususa umoya-mpilo.

• Okuqukethwe kwe-PI ephansi: Nge-nitrogen, ungasebenzisa ama-inks anama-photoinitiators ambalwa. Ama-PI ambalwa asho imikhiqizo embalwa enephunga elimnandi.
• I-Harder Surface: Ubuso buphulukisa ngokushesha futhi ngokuphelele, ukuvala inki futhi kuvimbele amakhemikhali aphansi ukuthi angafuduki.
• Ukusekelwa kwedatha: Ucwaningo lukhombisa ukuthi i-nitrogen inerting ingakhuphula amazinga okuguqulwa kwe-monomer kuze kufike ku-30%.

Ngingawakhetha kanjani ama-inki afanele wokuphrinta iphunga eliphansi?

Khetha ama-inks abhalwe ngokucacile "Ukufuduka Okuphansi" (LM) noma "Iphunga Eliphansi" elenzelwe ama-wavelengths e-LED (385nm noma 395nm). Qinisekisa ukuthi uchungechunge lwe-inki luhambisana nama-Nestlé Guidance Notes noma amazinga e-Swiss Ordinance, anciphisa ngokuqinile ukusetshenziswa kwama-photoinitiators anephunga eliphakeme kanye nama-monomers amancane e-molecule aziwa ukuthi abangela izinkinga zezinzwa.

Uhlu lokuhlola lokukhethwa kwe-inki

Akuwona wonke ama-"inki we-LED" adalwe ngokulinganayo. Lapho ngithola izinto, ngihlala ngicela umphakeli ngesitatimende sabo sokwakheka (SoC). Kufanele uqinisekise ukuthi i-inki ikhululekile ku:

1. I-Benzophenone: I-photoinitiator ejwayelekile eyaziwa ngokufuduka kanye nezingozi zephunga.
2. I-ITX (i-Isopropylthioxanthone): Enye i-PI enomlando wezindaba ezingcolile.

Izimfanelo ze-Ink Ezinconyiwe:

• Ukusebenza okuphezulu: Yakhelwe ukwelapha ngokugcwele ngokukhishwa kwamandla athile kohlelo lwakho lwe-LED.
• Isisindo esiphakeme samangqamuzana: Ama-molecule amakhulu mancane amathuba okuthi afuduke noma aguquke.
• Ikhono le-Dual-Cure Capability: Isexwayiso: Ngenkathi amanye ama-inks athi asebenza kokubili i-mercury ne-LED, ukwakheka kwe-LED okuzinikezele kuvame ukuhlinzeka ngokuxhumanisa okungcono kwezicelo ezibucayi.

Ukuze uthole ukucwila okujulile ezincazelweni zobuchwepheshe, kufanelekile ukufunda Kuyini ukuphulukiswa kwe-LED UV ephrinta i-flexo? ukuqonda ukuthi i-chemistry isebenzisana kanjani nomthombo wokukhanya.

Yiziphi izindlela ezinhle kakhulu zokuphrinta kwe-UV LED engenaphunga?

Imikhuba emihle ifaka phakathi ukugcina ukukhanya kwesibani okufanele, ukuphatha ukujiya kwefilimu ye-inki, nokulawula isivinini sokucindezela ukuqinisekisa ukuthi "Umthamo" wanele i-polymerization egcwele. Ukugcinwa njalo kwe-LED array kubalulekile, njengoba amafasitela engilazi angcolile anganciphisa ukukhishwa kwe-UV, okuholela ekwelapheni okungaphelele kanye nephunga lamakhemikhali elisele.

Operational Excellence for Low Smell

Ngisho noyinki omuhle kakhulu uzoba nephunga uma ungalapheki kahle. Nalu uhlaka lokusebenza engiluncoma kubaqhubi bezindaba:

1. Phatha ukuminyana kweyinki

Amafilimu we-inki aqinile kunzima ukwelapha. Ukukhanya kwe-UV kufanele kungene kuyo yonke indlela kuze kufike esisekelweni.

Ithiphu: Sebenzisa ama-inks anamandla aphezulu avumela amavolumu aphansi we-anilox (BCM). Ifilimu encane iphulukisa ngokushesha futhi ngokuphelele.

2. Ukuqapha ukukhanya (W / cm²) kanye nomthamo (J / cm²)

• I-Irradiance: "Isibhakela" noma ukuqina kokukhanya. Kubalulekile ukungena emibalazweni ye-opaque efana nomnyama nomhlophe.
• Umthamo: Amandla aphelele uyinki ayithola ngokuhamba kwesikhathi.
• Isenzo: Sebenzisa i-radiometer nsuku zonke. Uma ukukhishwa kwakho kwe-LED kwehla ngaphansi kwe-80% yesiqongo sayo, usengozini yokwelashwa okungaphelele.

3. Ukulawula Izinga Lokushisa

Ngenkathi i-LED "ipholile," ukusabela kwamakhemikhali kuyi-exothermic (kudala ukushisa). Qinisekisa ukuthi ama-roller akho e-chill asebenza ukugcina iwebhu izinzile.

4. Ukukhethwa kwe-Hardware

Ukusebenzisa i-Uhlelo oluhle kakhulu lokuphulukisa lwe-UV LED lwe-Flexo Label Printing kuqinisekisa ukuthi une-irradiance edingekayo yokushayela ukusabela ekupheleni. Amayunithi angaphansi kwamandla yimbangela ejwayelekile kakhulu yokuphrinta "kwe-tacky" noma okunukayo.

Isiphetho

Ukuqeda iphunga ephrintiweni le-UV flexo akuyona imilingo; kuyi-chemistry ne-physics. Ngokushintshela ekwelapheni kwe-LED, uqeda i-ozone nokushisa okuhlupha izindlela zendabuko. Kodwa-ke, ubuchwepheshe bodwa akwanele. Kufanele ubhangqa izinhlelo ze-LED zokusebenza eziphezulu ngama-inki wokufuduka okuphansi nokulawulwa kwenqubo okuqondiswayo.

Lapho ulawula ukwelashwa, ulawula ikhwalithi.

Ukulungele ukuthuthukisa umshini wakho?

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