100 m min ⁻¹ Industrial‐Scale Flexographic Printing of Graphene‐Incorporated Conductive Ink

Flexographic printing is promising for large-area electronics due to high print-speed and roll-to-roll capability. There have been recent attempts in using graphene as an active pigment inks, most notably slower techniques such inkjet screen printing. However, formulation of graphene-enhanced inks high-speed its effect on key metrics never investigated. Herein, nanoplatelets (GPs) are incorporated a conductive flexographic ink without compromising the rheological properties. An industrial scale at 100 m min−1 printed paper polyethylene terephthalate (PET) substrates commercial press, statistical performance variations investigated across entire print runs. It shown that GP-incorporation improves sheet-resistance (Rs) uniformity, with up 54% improvement average Rs 45% standard-deviation PET. The adhesion both GP-incorporation, verified by tape/crosshatch tests. durability GP-enhanced samples probed 1000 cyclic bend-test, 0.31% variation resistance flat state PET between first last bends, exhibiting robust print. statistically scalable results show offers cost-performance advantage patterns modifications traditional graphics presses.