Hard-Coated Films Protect Membrane Keyboards

Richard Woehr is using MacDermid Autotype's specialised hard-coated film technology to solve reliability issues related to membrane keyboards. The keyboards were from KM-Gehaeusetech, which Richard Woehr recently acquired. 'Our customers rely on our services and we work closely with them to determine the thickness, surface structure and ink adherence of the film required according to the specifications the product demands,' explained Karin Ferenbach of Richard Woehr.

'The films used by KM-Gehaeusetech came from various manufacturers around the world and didn't meet the quality standards that we have come to expect. 'In particular, there were issues with embossed panel areas and membrane keys fracturing due to mechanical stresses, plus poor adhesion of the under-surface printing inks and inferior chemical resistance,' he said. Having previously had excellent results using MacDermid Autotype's Autotex hardcoated film substrates, Richard Woehr converted to using them for the front-panel graphics, tactile membranes and circuit-switch layers of the membrane keyboards and graphics panels produced by KM-Gehaeusetech.

The hard-coated polyester-based Autotex films feature long flex life and excellent resistance to chemicals, UV light, high humidity, temperature, and mechanical wear and tear. They can easily be integrated into clear display windows and be easily embossed, while their availability in textured finishes for screen, ink-jet and digital printing make the foils hard-wearing and high-performing.

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