Ukuphulukiswa kwe-UV LED ye-UV Varnish: Isebenza Kanjani

Ukuphulukiswa kwe-UV LED kwe-UV varnish inqubo ye-photopolymerization esebenzisa ama-diode akhipha ukukhanya (ama-LED) ukomisa ngokushesha nokuqinisa ama-varnish ewuketshezi. Ngokungafani nezindlela zendabuko zokomisa ezithembele ekushiseni noma ekuhwamukeni, izinhlelo ze-UV LED zikhipha ama-wavelengths athile wokukhanya kwe-ultraviolet - imvamisa i-365nm, i-385nm, noma i-395nm - ebangela ama-photoinitiators ngaphakathi kwe-varnish. Lokhu kusabela kubangela ukuthi ama-oligomers awuketshezi nama-monomers axhumanise cishe ngokushesha, akha ifilimu eqinile eqinile, ecwebezelayo noma ye-matte. Lobu buchwepheshe bamukelwa kabanzi ekunyatheliseni nasekupakisheni ngoba bukhiqiza ukushisa okuncane kakhulu, budla amandla amancane, futhi buqeda ukukhishwa kwamakhemikhali e-organic volatile (VOCs), okwenza kube kuphephe kuma-substrates azwela ukushisa njengamafilimu amancane namapulasitiki.

Yini i-UV LED Curing Technology?

Ukuphulukiswa kwe-UV LED kuyindinganiso yesimanje yokuqinisa ukumbozwa kwezimboni nama-inks. Enhliziyweni yayo, ithatha indawo yama-bulbs abanzi wesikhathi esidlule ngemithombo yokukhanya ye-elekthronikhi egxile, enamandla kakhulu.

Kuma-varnishes ngokuqondile, inqubo incike kwinqubo yamakhemikhali "yokukhiya nokhiye". I-varnish yakhiwe ngama-photoinitiators athile aklanyelwe ukumunca ibhande elincane eliqondile lokukhanya kwe-UV elikhishwa yisibani se-LED. Lapho ukukhanya kushaya i-varnish emanzi, kubangela ukusabela kochungechunge okuqinisa ukumbozwa ngama-milliseconds. Ngoba ama-LED avula futhi avale ngokushesha ngaphandle kwesikhathi sokushisa, le ndlela isebenza kahle kakhulu emigqeni yokukhiqiza edinga amandla okuma nokuhamba.

Indima yama-wavelengths

Akuwona wonke ukukhanya kwe-UV okufanayo. Ukwelashwa kwe-UV LED kuvame ukusebenza ebangeni le-UVA. Ubude obuvame kakhulu be-varnishes ngu-395nm ngoba inikeza ukujula okuhle kakhulu kokwelashwa, ukungena ngezingqimba ezijiyile ze-varnish ecacile ukuqinisekisa ukunamathela ku-substrate engezansi.

Ukuze uthole ukucwila okujulile kokuthi lobu buchwepheshe busebenza kanjani ezingqimbeni ezahlukahlukene zezimboni, ungahlola UV LED Curing for Coatings ukubona ukuthi isayensi ilinganisa kanjani izinhlelo zokusebenza ezahlukahlukene.

Ngabe ukuphulukiswa kwe-UV LED kuqhathaniswa kanjani nezibani ze-mercury?

Ingabe ukuphulukiswa kwe-UV LED kungcono kunezibani zendabuko ze-mercury?

Yebo, ngezinhlelo zokusebenza eziningi zanamuhla, ukwelashwa kwe-UV LED kuphakeme ngenxa yokusetshenziswa kwamandla aphansi, isikhathi sokuphila isikhathi eside, nokunciphisa ukushisa okukhiphayo. Ngenkathi izibani ze-mercury zisasetshenziselwa ukwakheka okuthile, i-LED iba yinto ethandwa kakhulu embonini.

Energy Efficiency and Heat Management

Izibani zendabuko ze-mercury arc zikhiqiza inani elikhulu lokushisa kwe-infrared (IR), okungahlanekezela ama-substrates amancane afana nemikhono yokuncipha noma amalebula ashisayo. Izinhlelo ze-UV LED zikhipha amandla "okuphulukisa abandayo" - kukhona ukudluliswa okuncane kakhulu kwe-IR. Lokhu kuvumela amaphrinta ukuthi asebenzise i-varnish ezintweni ezibucayi ngaphandle kokuzigoqa. Ngaphezu kwalokho, ama-LED angasindisa kuze kufike ku-70% ezindlekweni zamandla ngoba anikwe amandla kuphela lapho ukwelashwa kwenzeka ngenkuthalo.

Isikhathi Sokuphila Kwemishini

• Izibani zeMercury: Imvamisa zihlala amahora ayi-1,000-2,000 futhi ziwohloka ngokuhamba kwesikhathi.
• Ama-LED e-UV: Angahlala amahora angaphezu kwama-20,000 ngokuqina okukhiphayo okungaguquguquki.

Yiziphi izinhlobo ze-varnish ezingalapheka nge-LED?

Ngingasebenzisa noma iyiphi i-UV varnish ngesibani se-LED?

Cha, awukwazi ukusebenzisa i-varnish ejwayelekile ye-UV ngesibani se-LED; kufanele usebenzise i-varnish eyenzelwe ngokukhethekile ukwelashwa kwe-LED. Ama-varnishes ajwayelekile aklanyelwe ukukhanya okubanzi kwe-spectrum, kanti ama-varnishes e-LED alungiselelwe ukusabela kuma-wavelengths athile amancane (njenge-395nm).

Formulation Matters

Uma uzama ukwelapha i-varnish ejwayelekile eyenziwe nge-mercury ngesibani se-LED, kungenzeka ukuthi ihlale i-tacky noma imanzi. Ama-photoinitiators ku-varnish ejwayelekile ngeke "abone" ukukhanya okuvela ku-LED. Kodwa-ke, ama-varnishes "amabili-ukwelashwa" ayatholakala asebenza nazo zombili izinhlelo.

Lapho ukhetha izinto ezibonakalayo, kubalulekile ukuqinisekisa ukuhambisana. Ukuze ufunde kabanzi mayelana nokufaneleka kwezinto ezibonakalayo, hlola lo mhlahlandlela ku Yiziphi Coatings Kungenziwa Ukwelapheka nge UV LED?, okuyinto ihlanganisa substrates ezihlukahlukene kanye ukwakheka kwamakhemikhali.

Izinkinga ezivamile: Kungani i-UV Varnish yami inamathela?

Kungani i-varnish yami ye-UV izwa i-tacky ngemuva kokuphulukisa?

Indawo enamathelayo noma "tacky" imvamisa ikhombisa ukuthi i-varnish ihlushwa "ukuvinjelwa kwe-oksijini" noma umthamo we-UV wawunganele. I-oksijini emoyeni ingaphazamisa ukusabela kokuphulukisa ebusweni obuphezulu kakhulu bongqimba lwe-varnish.

Indlela Yokulungisa Ukuvinjelwa Kwe-Oxygen

Ekwelapheni kwe-UV LED, ukuqina kokukhanya (irradiance) kufanele kube phezulu ngokwanele ukunqoba isithiyo se-oksijini.

1. Ukwandisa amandla: Qinisekisa ukuthi i-LED yakho isebenza ngamandla anele.
2. Hlola ibanga: Isibani kufanele sibekwe eduze kwe-substrate (imvamisa i-5mm-20mm). Njengoba ibanga likhula, ukuminyana kwamandla kwehla ngokushesha.
3. Reformulate: Sebenzisa ama-varnishes aphezulu aklanyelwe ngokukhethekile ukumelana nokuvinjelwa kwe-oksijini.

Imibuzo Evame Ukubuzwa

Uyini umehluko phakathi kwe-UV coating ne-UV varnish?

Ngenkathi ivame ukusetshenziswa ngokushintshana, "i-varnish" imvamisa ibhekisela kuketshezi olucacile olusetshenziswe emshinini wokunyathelisa (njengeyunithi yeyinki) ngemiphumela yendawo noma yezikhukhula. "Ukumbozwa kwe-UV" kuvame ukubhekisa ekusetshenzisweni kwezikhukhula okwenziwe ngaphandle kwe-inthanethi noma kuyunithi ye-coater ezinikezelwe yokuvikelwa. Ngamakhemikhali, zifana kakhulu, kepha indlela yokufaka isicelo ihlukile.

Ingabe ukwelashwa kwe-UV LED kuphephile emaphaketheni okudla?

Yebo, inqobo nje uma kusetshenziswa ama-varnishes "aphansi." Ngoba i-UV LED iphulukisa ngokushesha futhi ngokuphelele, kunengozi ephansi yamakhemikhali angaphenduliwe athuthela ekudleni uma kuqhathaniswa nama-inki asuselwa ku-solvent. Kodwa-ke, ukunamathela ngokuqinile ku-GMP (Imikhuba Emihle Yokukhiqiza) kuyadingeka.

I-UV LED varnish ithatha isikhathi esingakanani ukwelapha?

Cishe ngokushesha. Ukusabela kwenzeka ngengxenyana yomzuzwana njengoba i-substrate idlula ngaphansi kwe-LED array. Lokhu kuvumela isivinini sokukhiqiza esifinyelela kumamitha angama-500 + ngomzuzu ngokuya ngemishini.

Key Takeaways

• I-Wavelength Matching: Kufanele usebenzise ama-varnishes aklanyelwe ngokukhethekile ubude be-LED (imvamisa i-395nm) ukuqinisekisa ukwelashwa okufanele.
• Ukunciphisa ukushisa: I-UV LED ibeka ukushisa okuncane kakhulu ku-substrate, ivumela i-varnishing kumafilimu amancane nokugoqa okunciphayo.
• Ukonga Amandla: Ikhono "lokuvula / ukuvala okusheshayo" liqeda ukusetshenziswa kwamandla okulinda, kunciphisa kakhulu izindleko zokusebenza.
• Ukuvinjelwa Kwe-Oksijini: Uma ubuso buyi-tacky, hlola ibanga lakho lesibani nokuqina; ukuqina okuphezulu kuyadingeka ukwelapha ungqimba lomhlaba ngokugcwele.

Isiphetho

Ukuphulukiswa kwe-UV LED kwe-UV varnish kumelela ukugxuma okukhulu phambili kubuchwepheshe bokuqeda. Ngokusuka kumalambu e-mercury ashisa kakhulu kuya kuma-LED apholile, asebenza ngamandla, abakhiqizi bangakhuphula ukudlula futhi basebenze nezinhlobonhlobo zezinto zokwakha.

Uma ushintshela ku-UV LED, qala ngokuhlola uhlu lwakho lwamanje lwe-varnish ukuqinisekisa ukuhambisana kwe-wavelength. Ukushintshwa akugcini nje ngokuthuthukisa ukunyathela kwakho kwemvelo kepha kuvame ukuholela ekugcineni okungaguquguquki, okusezingeni eliphakeme.