Selecting the Optimal Adhesive for your Health Sensor 


Posted Wed, 26th February 2020

When we think about our skin, we tend to forget one pretty central fact: it’s not simply the outside of our body… it’s an organ in and of itself. That means that it expands, contracts, sweats, shivers, absorbs, breaks, and heals – all things that can provide a number of challenges when you’re trying to design a health sensor that ticks all the right boxes. With the aid of a proper adhesive to stick your product to skin, your job as a design team becomes easier and simpler. There is a plethora of factors to consider, so what should you keep in mind when selecting the best adhesive that will let your device do its job?

 

Wear Time & Duration

Not every adhesive is built equally – one of the first and most important questions to ask yourself when choosing an adhesive is the duration of time someone will be wearing it: is it for 30 minutes or upwards of a few days? Skin is a part of a living organism, so factoring in breathability and gentleness in the adhesive is important, especially if there will be a long period of time that the device will stay on a person. 

 

Size & Weight 

While health sensors are certainly following a trend of small, sleek, and unobtrusive, sometimes a larger device is needed, and this needs to be factored into choosing an adhesive. A fine balance must always be maintained with your device: have an adhesive tough enough to stay in place and carry the weight of your device, but breathable and non-abrasive so as not to damage any skin. 

 

Conformability 

Will the sensor go on the neck? Will it go on the lower leg? Maybe it gets better readings in different places. The human body comes in all shapes and sizes and so having an adhesive that will adapt to different places on it is integral in designing an effective sensor. Conformability is also ergonomic for the person wearing the sensor – it’s simply not permissible to have a device that weighs down, pulls on the skin or is unadaptable. 

Water Resistance 

Not every device you’ll be designing will be utilised in pristine, dry laboratory conditions. A lot of the time, clients will be using your devices to monitor their bodies while running, climbing or swimming. That means that your device’s adhesive is going to have to stay secure while being put through the most rigorous of conditions. 

 

Conductivity 

We’re under no illusions that the main point of your device isn’t to be sticky – it’s to be able to function properly in spite of adhering to the skin. Having accurate information scrambled by poor conductivity in an adhesive is, frankly, counterintuitive to the whole effort. A good adhesive must be able to do its job without interfering with the device’s purpose. 

 

These are a myriad of factors to keep in mind – but PolarSeal’s access to top-of-the-line materials from our material suppliers including 3M and Avery Dennison gives a variety of choice when it comes to creating the perfect adhesive to meet your company’s requirements. To find out what PolarSeal can do for your health sensors, get in touch with one of our wearable specialists on +44 1252 726000 or send us a message at info@polarseal.net.