Screen flexible substrates

Textiles, paper, and other flexible substrates such as fusible interlining, interlinking drapery and upholstered fabric, and carpets are examples of large volume applications. Another important market is with metals and other rigid materials. Included are plastics (pipes, tanks, screens, etc.) that can provide protective coatings using its variety of processing techniques. 

Chem. Descrip. Aliphatic urethane acrylate Uses Urethane-acrylic for UV/EB-cured silk screen inks on flexible substrates, highly flexible overprint varnishes, adhesives plasticizer for epoxy acrylates... 

FIGURE 4.11 (continued) (See color insert following page 8-22.) The screen is placed on a substrate, and an ink, in this case a blend including silver to form a counterelectrode, is drawn across the screen with a spatula (c). Ink passes through the screen only where it was opened during the developing process. The result is a pattern of ink on a flexible substrate (d). 

Flexible substrates for screen-printed electrodes must meet a range of demanding requirements, especially for display applications. Besides the most obvious requirement - low flexural rigidity - they also need high temperature stability. 

The effect of mechanical stress on screen-printed sensors fabricated upon differing electrode substrates has been studied by Wang et al. [80]. The different substrates utilised within the study included Mylar, polyethylene naphthalate (PEN) and Kapton. In this instance, the bending of the electrodes to extremely small radii of curvature was determined to have minimal effect upon the electrochemical behaviour, resulting in only a small increase in the electrical resistance of the sensors. Additionally, the study determined that the electrochemical signal was not adversely impacted from cyclic bending this illustrates the robust nature of screen-printed electrodes upon flexible substrates [80],... 

Recently, Jang prepared a water-dispersible RuOa-graphene-based inks stabilized by PEDOT PSS [184], which can be screen printed on the flexible substrate for high-performance electrochemical capacitors (Fig. 21). The resulting screen-printed... 

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