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Advanced Engineering 2021

NEC Birmingham(B40 1NT)

03/11/2021 - 04/11/2021

Join us in our 12th and most important edition to date, as we invite engineers and management from all (more)

Next generation pressure sensing film technology

Next generation pressure sensing film technology A new development in environmentally friendly tactile pressure sensing film promises improved visual detail and significantly reduced costs.

This new tactile surface pressure mapping sensor film product is claimed to offer the highest resolution and visual detail available for fast and accurate surface contact stress analysis. Whether the application involves bolted interfaces, impressions between rollers, fine lines of electronic circuitry, lamination presses or heats sealers, engineers no longer need to be content with grainy and pixilated imagery in their surface pressure maps.

Developed by Sensor Products, the Pressurex-micro Green (PMG) uses a combination of sophisticated adhesives and pigment coating processes made with the greenest possible toxin-free recyclable materials, accomplishing what other surface mapping products have done but without the heavy environmental footprint, making corporate certification departments happy all over the world.

"Pressurex-micro Green was developed in response to customers' needs for an inexpensive yet credible surface pressure mapping sensor," says Jeffrey Stark, president of Sensor Products. "It fulfills our customers' primary requirement - pressure distribution mapping at a sharply reduced price. By excluding the frequently unnecessary feature of pressure magnitude determination, engineers are able to obtain a-la-carte functionality paying for only what they really need. Now, instead of waiting, users can perform an immediate visual assessment."

So how does it work? Microscopic pigmented particles adhered to the donor substrate are attracted to the chemically surface-treated receiver sheet. This receiver sheet coating has been formulated to create a noncovalent bond as described by the Van der Waals force equation. The chemical compatibility between the receiver sheet and the donor sheet cause intermolecular diffusion that creates an interpenetrating network between the pigment donor and the receiver. Upon separation, microshear forces compel the particles to dislodge from the pigmented donor substrate, leaving an impression.

PMG is thin (0.2mm), flexible and conformable allowing its use in tight spaces, especially where draping over curvacious surfaces is required. Like other surface pressure mapping products, PMG comes on a roll and can easily be cut with scissors to the desired sizes and shapes required for the application. PMG is a colour changing visual indicator film that captures and reveals surface contact force between any two physically contacting surfaces. The colour change is instantaneous and permanent. The more intense the colour the higher the pressure.

Sensor Products offers five distinct pressure ranges of PMG. Within these ranges, PMG reveals pressure but does not reveal the actual pressure magnitude occurring. The technology has numerous benefits over alternative technologies. As a simple consumable, it is ready to use out of the box, with no training and no setup needed. There are no expensive electronics or instruments required; the results can be interpreted visually. The pressure distribution is visible in markedly high definition and detail. And there is zero 'development' time: PMG reveals the final state of the pressure map it captures without any wait.

Sensor Products says there are applications for PMG across a spread of markets. In packaging and converting, PMG can be used for nip roller impressions, heat sealing and lamination. In the automotive industry, PMG will provide a solution with brake pads, clamping, clutches, batteries and fuel cells, impact, gaskets and bolted joints, lamination and welding. In electronics, there are applications with heat sinks, connectors, lamination, LCD bonding, wafer bonding/polishing and solar cells. In the aerospace industry, Sensor Products sees applications with composite layup, fuel cells, lamination, impact and bolted interfaces. Finally, in any application where ergonomics plays a significant role, PMG could be used for body mapping and to measure biomechanics.
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