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Ink as a Substrate in Flexible Packaging Laminations

This presentation by Bruce Foster from Mica Corporation delves into the effects of ink type and color on adhesion in extrusion laminations using various substrates, particularly focusing on 12-micron polyester film. The study investigates different ink chemistries, such as vinyl-modified polyurethane and modified polyamide, alongside various primers, including polyethylene-imine and polyurethane. Experimental results highlight the impact of pre-priming and indicate that modified polyamide inks achieve the best adhesion, while white inks exhibit the lowest adhesion levels. The findings offer essential insights for optimizing adhesion in flexible packaging applications.

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Ink as a Substrate in Flexible Packaging Laminations

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  1. Ink as a Substrate in Flexible Packaging Laminations IOPP Technical Bag Committee Winter 2013 Meeting Presented by: Bruce Foster Mica Corporation

  2. Better Understand Effects of: • Ink “Type” (polymer base) • Ink Color Objective On Adhesion in Extrusion Laminations (with PRIMERS, of course!)

  3. 12-micron polyester film – 1-side factory treated Inks – solvent-based, toluene-free • 3 chemistries – • Vinyl-modified polyurethane • Modified-polyamide • Modified-polyurethane Materials

  4. 12-micron polyester film – 1-side factory treated Inks – 3 chemistries Primers – Water-Based • 2 chemistries – • Polyethylene-imine • Polyurethane Materials

  5. Lab Experiments – Set I • Ink draw-downs on polyester film: • Different types & colors • Prime over “printed” samples: • Polyethylene-imine based extrusion primer Approach • Extrusion-coat on lab pilot line: • High-temperature polyethylene

  6. Lab Experiments – Set I 40-micron polyethylene @ high temperature Approach primer ink 12-micron polyester film (corona-treated)

  7. Ink lift-off 12-micron polyester film (corona-treated)

  8. All Samples - Ink lift-off

  9. Ink Splits Ink lift-off

  10. Lab Experiments – Set I Modified Polyamide Inks had best adhesion to polyester film Polyethylene-imine primer works with all inks tested Learnings 3. White inks had lowest adhesion to films

  11. ???

  12. Lab Experiments – Set II • Pre-prime polyester film • Both imine and urethane primers • Print over primed samples: • Vinyl-modified polyurethane inks Approach 3. Prime over printed samples: • Both imine and urethane primers 4. Extrusion-coat on lab pilot line: • High-temperature polyethylene

  13. Lab Experiments – Set II 40-micron polyethylene @ high temperature Approach primer Vinyl-modified polyurethane inks primer 12-micron polyester film (corona-treated)

  14. Results – Set IIa Results

  15. Results – Set IIb Results

  16. Lab Experiments – Set II Pre-priming works for vinyl-modifed polyurethane inks! Both primer chemistries gave mostly good results Learnings 3. Polyethylene-imine pre-primer was best for white ink adhesion

  17. Lab Experiments – Set I Modified Polyamide Inks had best adhesion to polyester film Learnings Polyethylene-imine primer works with all inks tested 3. White inks had lowest adhesion to films

  18. P.T. Colorpak Indonesia, Tbk. Jonida Gjika – Lab Chemist Mica Corporation Thanks TAPPI PLACE

  19. Thanks, for your attention! Questions? Bruce Fosterbfoster@mica-corp.com

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