HYBRID UV IS IT REALLY ALL UV-LED A C H I M H E R Z O G T H E I J C

Transcription

1 HYBRID UV IS IT REALLY ALL UV-LED A C H I M H E R Z O G T H E I J C

2 WHO ARE INTEGRATION TECHNOLOGY LTD. Founded 2000 with the focus on UV-systems for the Inkjet industry Based in Upper Heyford (Oxfordshire) / United Kingdom World s largest portfolio of UV-Lamp and UV-LED systems no dedication to only one curing technology therefore neutral look for the best curing result Sales and Service subsidiaries in more than 10 countries across the globe Since 2015 part of the IST METZ Group of companies

3 WE HAVE THE CURE

4 WIDE RANGE OF CONVENTIONAL LAMP AND UV-LED TECHNOLOGY

5 INK JET MARKETS AND DEMANDS

6 INKJET MARKET Large Format Sheetfed Commercial Promotion Food Pharma Color gammut Special effects Inkjet Label Corrugated Flexible Packaging Direct to product Industrial Decoration Cosmetics Electronics Functional layers Automotive Durability Adhesion Low Migration Resistance

7 INKJET MARKET Large Format Sheetfed Commercial Promotion Food Pharma Color gammut Special effects Inkjet Label Corrugated Flexible Packaging Direct to product Industrial Decoration Cosmetics Electronics Functional layers Automotive Durability Adhesion Low Migration Resistance

8 INKJET MARKET Large Format Sheetfed Commercial Promotion Food Pharma Color gammut Special effects Inkjet Label Corrugated Flexible Packaging Direct to product Industrial Decoration Cosmetics Electronics Functional layers Automotive Durability Adhesion Low Migration Resistance

9 INKJET MARKET Large Format Sheetfed Commercial Promotion Food Pharma Color gammut Special effects Inkjet Label Corrugated Flexible Packaging Direct to product Industrial Decoration Cosmetics Electronics Functional layers Automotive Durability Adhesion Low Migration Resistance

10 INKJET MARKET Large Format Sheetfed Commercial Promotion Food Pharma Color gammut Special effects Inkjet Label Corrugated Flexible Packaging Direct to product Industrial Decoration Cosmetics Electronics Functional layers Automotive Durability Adhesion Low Migration Resistance

11 DEMANDS OF THE INKJET MARKET Scale colors Spotvarnish Haptic Matt-Gloss Effect special colors Color gammut Varnish Special effects Metallic Removable Adhesion Scratch VOC Resistant fading ALL UV-LED? Indirect food contact Low Migration Pharmaceutical Tobacco Direct food contact Durability Resistance Sun Saltwater Oil and Fat

12 UV PRINCIPLE AND HURLDES

13 Vacuum UV UV-C UV-B UV-A 100nm 200nm 280nm 320nm 420nm 700nm WORKING PRINCIPLE UV UV Spectra Mercury 395 UV-C UV-B UV-A X-Ray Visible Light IR

14 WORKING PRINCIPLE UV Effect of different wavelength Mercury 395 UV-C UV-B UV-A Cure depth Inkdrop substrate

15 UV-LED WAVELENGTH Available wavelength UV-A (320nm-420nm) Common UV-LED wavelength 365, 375, 385, 395 and 405nm and mixtures of the same widely available UV-B ( nm) and UV-C ( ) commercially hardly available, expensive, not powerful and reduced lifetime Cost Performance Lifetime 275nm 365nm 395nm Using UV-A chips currently the only sensible and commercial solution

16 BENEFITS OF UV-LED Cold lightsource (no IR emitted by the UV-LEDs) Sensible substrates possible No UV-C means less harmful UV output Easy light shielding Less visible light Easy light shielding and integration in the press Deep penetration in the Substrate Inks widely available On-Off switching and longer lamp lifetime O N LY B E N E F I T S?

17 COLD LIGHTSOURCE Very good for heat sensible substrates B U T do all these industries need low heat Precuring with UV, final drying in oven Application in engine area Injection molding C Inkjet Large Format Sheetfed Label Corrugated Flexible Packaging Direct to product Commercial Industrial Promotion Food Pharma Decoration Cosmetics Electronics Functional layers Automotive Color gammut Special effects Durability Adhesion Low Migration Resistance

18 HEAT Rule of Thumb: increase of 10K (Kelvin) during chemical reaction = double the reaction speed (van t Hoff equation resp. Arrhenius equation) Heat helps the Exothermal reaction and better curing can be achieved

19 NO UV-C UV-C creates Ozone and is aggressive B U T can it also help sometimes Ozon in combination with UV-C can help cleaning the surface and/or change surface properties UV-C might break chemical bonds and Ozon and exited Oxygen react with these open bonds (2 -> O 3 + O) UV-C helps to create a Scratch resistant durable surface cure immediately LED inks tend to post cure after passing the UV system (typically up to 24h) Wider range of Photoinitiators available for lower wavelength UV Less yellowing of varnishes More variability in times of increasing pressure from REACH and Chinas Blue Sky initiative

20 MONOCHROMATIC LIGHTSOURCE Photoinitiators () are broadband absorber Different peaks help the to work better and faster Depending on the the ink is curing at different wavelength and with different speed

21 INHIBITION Oxygen inhibition A reaction inhibitor is a substance that decreases the rate of, or prevents, a chemical reaction (Wikipedia) P E R F E CT W O R L D I N K D R O P

22 INHIBITION Oxygen inhibition A reaction inhibitor is a substance that decreases the rate of, or prevents, a chemical reaction (Wikipedia) PR ERA LF IE TCT Y W O R L D I N K D R O P

23 INHIBITION Avoid Inhibition More peak power to crack open the bonds or shorter wavelength NO HW I EB RI T I O N I N K D R O P

24 INHIBITION Avoid Inhibition Exchanging Oxygen with slower reacting Nitrogen IN I HT RI BO IGT EI ON N N N 2 ON 2 2 N 2 ON 2 ON 2 ON 2 ON 2 O O N N 2 2 N 2 N 2 I N K D R O P N 2 N2 N2 ON 2 ON 2 ON 2 ON 2 ON 2 N2 ON 2 ON 2 ON N 2 ON 2 ON 2

25 HYBRID UV CASE STUDY

26 HYBRID UV - INDUSTRIAL Depending on the application a combination of benefits is useful E.g. Printing on industrial plastic directly after injection molding Durability Adhesion Resistance Primer needed Surface treatment needed Pinning needed Final cure needed Inkjet Large Format Sheetfed Label Corrugated Flexible Packaging Direct to product Commercial Industrial Promotion Food Pharma Decoration Cosmetics Electronics Functional layers Automotive Color gammut Special effects Durability Adhesion Low Migration Resistance

27 LED curing LED Pinning LED Pinning LED Pinning LED Pinning LED curing LED curing INDUSTRIAL PRINT Printing on industrial plastic directly after injection molding A L L L E D Primer Inkjet, Spray, flood Pretreatment Corona, Plasma, Flame, IPA,

28 ARC LED curing LED Pinning LED Pinning LED Pinning LED Pinning ARC LED curing LED curing INDUSTRIAL PRINT Printing on industrial plastic directly after injection molding AH LY L B RL IED U V Primer Inkjet, Spray, flood Pretreatment Corona, Plasma, Flame, IPA,

29 INDUSTRIAL PRINT Using Hybrid UV Technology might allow using easier available and better for the purpose Primers reducing or emliminating the need of pretreatment harder and more durable resistant surface eliminating the need of clearcoat/varnish Prinitng on substrates that are hard to print with only UV-LED available inks

30 HYBRID UV - LABEL Depending on the application a combination of benefits is useful E.g. Single pass Label Printing for Promotion/ Decoration Color gammut Adhesion Fast running Surface treatment needed Pinning needed Final cure needed Inkjet Large Format Sheetfed Label Corrugated Flexible Packaging Direct to product Commercial Industrial Promotion Food Pharma Decoration Cosmetics Electronics Functional layers Automotive Color gammut Special effects Durability Adhesion Low Migration Resistance

31 ARC curing SINGLE PASS LABEL PRINT Single Pass Label Printing A L L A R C Printing wet in wet tends to bleeding and bad Colour gammut Pretreatment Corona

32 LED Pinning LED Pinning LED Pinning LED Pinning LED Pinning ARC curing SINGLE PASS LABEL PRINT Single Pass Label Printing H Y B R I D U V Pretreatment Corona

33 LED Pinning LED Pinning LED Pinning LED Pinning LED LED Pinning Heavy Pinning ARC curing SINGLE PASS LABEL PRINT Single Pass Label Printing H Y B R I D U V Pretreatment Corona

34 SINGLE PASS LABEL PRINT Using Hybrid UV Technology might allow Crisp and clear printout with sharp edges even with UV-Arc based inks Good adhesion of scale colors on top of white by creating a tacky surface Overcome the problem of blistering on heavy Ink Lay Downs Less possible migration due to Arc based inks and less

35 SUM UP Hybrid UV combines the best of both worlds Compact UV-LED for pinning UV-LED for deepcure Arc for final cure Heat from Arc lamps for faster reaction And can give you benefits Wider range of available Stronger surface cure, better scratch resistance and durability Low migration Avoiding expensive additional work arounds what else

36 EXCIMER WORKING PRINCIPLE

37 Vacuum UV UV-C UV-B UV-A 100nm 200nm 280nm 320nm 420nm 700nm WORKING PRINCIPLE EXCIMER UV Spectra 172nm Vacuum-UV UV-C UV-B UV-A X-Ray Visible Light IR

38 EXCIMER KEY FACTS Lamp length: 120 mm 2300 mm Power: Approx. 5W/cm, max. 1 KW, % power adjustment Efficiency: approx. 40% Homogenity over lamp lenght: >95% Run up time: approx. 30 s Other wavelength by changing the gas (222 or 308 nm) Dielectric barrier discharge (DBD) reaction with quarz bulb as a dielectric barrier and the gas filling as discharge medium.

39 A H E R Z O U V I N T E G R A T I O N. C O M