Dr. Markus Wildberger, Papierfabrik August Koehler SE. John Haigh, Dow Coating Materials. Eine neue, innovative thermodirekt Drucktechnologie

Transcription

1 Dr. Markus Wildberger, Papierfabrik August Koehler SE John Haigh, Dow Coating Materials Eine neue, innovative thermodirekt Symposium der Papieringenieure 2017

2 Agenda (1) State of the art Technology (2) Innovative Approach (3) Challenges (4) Product 2

3 (1)Thermal Paper 3

4 (1) Thermal Printing Fast Quiet Reliable Compact High Resolution Low Maintenance No Additional Consumables 4

5 (1) Traditional Thermal Paper Structure Color Former Color Developer Thermal Printhead Sensitizer Thermal Layer Pre-Coat Base Paper 5

6 (1) Thermal Reactive Chemistry R 2 R 1 R 1 R 2 N + R 3 N R 3 R 4 R 4 heat C - colorless dye colored dye + + H H H H bisphenol A (developer) 6

7 (1) Alternatives to BPA EPA Bisphenol A Alternatives for Thermal Paper Input from stakeholders from business, government, academia, and environmental organizations. Most alternatives have Moderate hazard designations for human health and/or High or aquatic toxicity endpoints Alternative Developers: H S H H S H H S 4,4 -BPS 2,4 -BPS D-8 H S H S H S NH NH S MAE-BPS TG-SA PF201 7

8 (2) Innovative Approach: Voided Paper Structure scattered Voided paque Layer Color Base Paper 8

9 (2) New Heat Sensitive Paper Mechanism Voided paque Layer Color Base Paper 9

10 (2) Multi-Disciplinary Project approach Analytical Chemistry Emulsion Polymerization Application Testing High Throughput Heat-sensitive Coating Formulation Expertize Coating Technology The more we talk together, the more we solve together 10

11 (2) Ropaque TM Polymer Technology Carboxylic Acid- Functionalized Core Encapsulation Polystyrene Copolymer Shell Neutralization Drying paque Polymer Sunspheres 0.4 micron HT micron Dual 0.45 micron Ultra 0.45 micron TH micron TH micron 11

12 (2) Ropaque TM paque Polymer Polymer Shell RI = 1.6 Air RI = 1.0 Potential Refractive Index Interfaces The refractive index difference between the air void and the surrounding polymer gives opaque polymer the ability to scatter light 12

13 (3) Challenge: pacity Particle Size Void Size 100 Predicted Brightness: 450 nm Radiation Scattering (whiteness) Brightness Whiteness of Conventional Thermal Paper Void Diameter (nm) Coating Thickness, microns 13

14 (3) Challenge: Void Collapse Glass Transition Temperature ptimized Morphology 14

15 (3) Challenge: Contrast (1) pacity Print Darkness Coating Thickness 15

16 (3) Challenge: Contrast (2) Controlling the image contrast through the optical density by thermal plasticizer T g 1 T g 2 heat T g 1 > T g 2 thermal plasticizer (wax) 16

17 (4) Product: Air Void Collapse During Printing Before Printing After Printing No. 1, 3.2g 17

18 (4) Product: Comparison to Traditional Thermal Paper Traditional phenol free Traditional phenol free Blu4est 18

19 (4) Product 19

20 (4) Successful Innovation Environmentally friendly Better aging with UV stability, longer lasting image Consumer can easily distinguish it from traditional thermal paper Phenol-free point-of-sale receipt thermal imaging paper Compatible with existing thermal printers First thermal paper for DIRECT FD CNTACT 20

21 Vielen Dank für Ihre Aufmerksamkeit!