Inkjet: A Driver For Change In The Coatings Industry


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Xennia's Dr Kay Yeong presented a talk at the European Coatings Conference in Berlin, Germany in Oct 2010. The talk discussed the impact of inkjet technology on the packaging coatings industry.

The conference presented a suite of high-level technical papers, given by invited international experts, on topics such as sustainable packaging coatings, printable coatings, heat seal lacquers and hybrid barrier films.

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Inkjet: A Driver For Change In The Coatings Industry

  1. 1. INKJET: A DRIVER FOR CHANGE IN THE COATINGS INDUSTRY Kay Yeong, PhD Presented at European Coatings Conference Berlin, October 2010
  2. 2. PRESENTATION OUTLINE About Xennia Inkjet Printing Types of Printheads Coating Applications Examples of Industrial Printing Systems
  3. 3. BACKGROUND Xennia is the world’s leading industrial inkjet solutions provider 14 year history, over 300 customer development programmes World class reputation underpinned by a strong IP portfolio Unique expertise in inkjet chemistry with strong engineering capability Headquartered in UK, offices in Netherlands, US and China Offering reliable inkjet process solutions: Inkjet modules and inks for OEM partners with market access Printing systems and inks for end users
  4. 4. FROM INKJET IDEAS ...TO PRODUCTION REALITYink formulation & test evaluation tools system design production solutions
  5. 5. WHAT IS INKJET PRINTING?A mechanism for controlled ejection of discrete drops of fluidExamples of actuation mechanisms: Deformation of piezoelectric crystals Thermal expansion of bubbles Movement of microelectromechanical partsEffectively analogous to a fountain pen, except much smaller! Drop volumes1-80 pL Inkjet printing allows non-contact, digitally-controlled deposition of chemistry
  6. 6. WHAT MAKES INKJETDIFFERENT? Non-contact Deposit on to fragile or 3D surfaces Build composites and 3D structures Digital control Alter deposition patterns at will Equally suited to short or long runs Functional materials Organic, inorganic and biomaterials Solutions, colloids and emulsions
  7. 7. INKJET PRINTINGPrinted features are built-up drop by dropTypical dot sizes range from 30-100 mMorphology of printed features can be tuned by adjusting ink properties UV-cured ink UV-cured ink on plastic on copper Transparent Copper lines UV-cured ink on plastic on plastic
  8. 8. PRINTHEAD SELECTIONPrinthead choice must be matched to the application: Large drop volume (50-80 pL) for large area coatings Small drop volume (5-40 pL) for targeting specific regions, high quality graphics Variable drop volume (greyscale) for high quality graphics, control of deposition amount Throughflow recirculation for inks containing dense particles Water, solvent or UV compatible Print swathes 2 -108 mm wide Native printing resolution 30-600 dpi Printing frequency up to 20kHz per nozzle (~ 50-75 m/min) 64-2656 nozzles
  9. 9. EXAMPLES OF PRINTHEADS Xaar 1001 TTEC CF-1 Kyocera KJ-4360dpi, 8 level greyscale 300dpi, 8 level greyscale 600dpi, 5 level greyscaleSupports recirculation Supports recirculation Aqueous, UV-based inksUV, oil, solvent-based inks UV, oil-based inks High productivity (20kHz)1000 nozzles 636 nozzles 2656 nozzles Dimatix Q class Trident 768jet 300+dpi, 4 level greyscale Binary UV, oil, solvent-based inks Aqueous, aggressive inks High productivity (16kHz) Stainless steel, refurbishable 256 nozzles 768 nozzles (256 ch)
  10. 10. PACKAGING COATINGS Types of coatings: Decorative Functional Security Types of packaging materials: Paper Cardboard Plastic Glass Metal Textile
  11. 11. DECORATIVE COATINGS Traditionally just standard process colours Increasing use of special effect pigments and dyes Process colours – low level amount of material usage makes it Spot colours cost effective White Optical brighteners New avenues of impact include: Texturisation of surfaces Deposition of scents Metallic Fluorescent Metallic effect colours Gloss Thermochromics Photochromics MattElectrochromics Textures Scents Liquid crystals Optical effects
  12. 12. FUNCTIONAL COATINGS IR absorbers Hydrophobic coatings Hardcoats Stiction modifiers New inkjet functional coatings Reduced friction take advantage of developmentsAnti-corrosion coatings in nanotechnology Selective deposition of materials Antimicrobial Thermal history Less usage of material tracking Effectively controls costs Conductive graphite,Barrier materials Multi-functional composite metals & polymers coatings possible on all types of Chemically-resistant substrates Handle modifiers coatings Support films Biomaterials
  13. 13. SECURITY COATINGS Increasingly important for brand and consumer protection Chemically Radioactive Item-level lifetime tracking expected to reactive materials tracers increase Magnetic Optically variable Variable data capability is vital to success materials surfaces Typically involve high-cost materials – low Quantum Narrow band deposition volumes complements well dots absorbers Key areas of new implementations: Lenticular Inorganic Non-evident features printing luminescents Opportunistic camouflage Conductive graphite, metals Liquid Nano-composite structures & polymers crystalsThermochromics Photochromics Textures Fragile coatings Biomaterials