The Sticky Science Behind the Artificial Pancreas: How Advanced Adhesives Are Redefining Diabetes Wearables

8.4 million Americans – that’s 2.34% of the U.S. population – rely on daily insulin injections to survive. And that number keeps climbing.

For biomedical engineers and product managers, this isn’t just a statistic. It’s a call to action. Every improvement in insulin delivery reliability, every extra day a wearable sensor stays on the skin, every reduction in “user error” translates into real clinical outcomes. And at the heart of these breakthroughs? Often, it’s an overlooked component: the adhesive.

Modern pressure-sensitive adhesives (PSAs) are enabling a new generation of continuous glucose monitors (CGMs), insulin pumps, and smart insulin pens. But designing these sticky parts isn’t as simple as picking the strongest tape. It’s a balancing act of wear time, skin comfort, device architecture, and manufacturability.

Let’s break down the three most impactful innovations in diabetes wearable adhesives – and why partnering with an experienced manufacturer (like Deson) can turn a prototype into a reliable, regulatory-ready product.

1. Sensor Overlay Patches: More Than Just a Sticker

Anyone who has worn a CGM knows the enemy: doorframes, waistbands, and morning showers. An accidental snag can rip off a $50 sensor days before it expires.

Overlay patches solve this by creating a low-friction, highly conformable shield. But their job is double:

• Mechanical protection – They absorb tugging from clothing and prevent edge lifting.

• Environmental barrier – High-quality medical-grade adhesives block moisture, soap, and particulates from seeping under the sensor base.

The challenge? Too aggressive an adhesive can damage fragile skin during removal. Too mild, and the patch fails on day two. The sweet spot is a patterned, breathable acrylic or silicone adhesive that holds for 7–14 days but releases cleanly.

Pro tip: Prototyping with different adhesive chemistries on skin-mimicking substrates (e.g., synthetic gelatin) can save months of reformulation later.

2. Joining Monitoring and Delivery: The Adhesive’s Role in Closed-Loop Systems

The holy grail of diabetes tech is the automated insulin delivery (AID) system – sometimes called the artificial pancreas. It connects a CGM, an insulin pump, and a smart algorithm to automatically adjust insulin levels.

But physically, you have two (or three) separate components that must adhere to the body. Here’s where adhesives get strategic.

All-in-One Patch Pumps

These combine the CGM sensor and the insulin infusion set under a single adhesive patch. The user applies one device instead of two – a huge win for convenience.
However, two design hurdles emerge:

• Feedback loop interference – If the glucose sensing site is too close to the insulin delivery site, the newly infused insulin can artificially alter local interstitial fluid readings, causing the algorithm to overcorrect.

• Replacement mismatch – Infusion sets typically need changing every 2–3 days, while CGM sensors can last 7–14 days. A truly integrated patch must allow for independent replacement, which often requires multiple adhesive zones on the same baseplate.

Sensor-Augmented Pumps (SAP) with Separate Adhesives

Most AID systems today keep the CGM and infusion set as separate wearables, connected wirelessly. This gives designers flexibility:

• CGM adhesives – Need ultralong wear (10–14 days) and extreme sweat/humidity resistance. Acrylic or rubber-based adhesives with high shear strength work best.

• Infusion set adhesives – Often changed every 2–3 days, so they can be gentler. Silicone-based patches are ideal for patients with sensitive skin or tape allergies.

The key insight? One adhesive does not fit all. Smart manufacturers offer different material solutions for different wear durations and skin types – and they validate them with real-human wear tests before mass production.

3. Extending Wear Time Without Damaging Skin

The industry is pushing toward 21-day wear for CGM sensors. Adhesive suppliers like Avery Dennison have answered with products like MED 5744 – a double-coated polyethylene foam tape that maintains adhesion through sweat, showers, and exercise for three full weeks.

But long wear comes with a downside: medical adhesive-related skin injuries (MARSI) . Prolonged occlusion, aggressive removal, and repetitive application on the same site can cause irritation, blisters, or even skin stripping.

How leading manufacturers address this:

• Low-irritation chemistries – Silicone-based adhesives for the first few days of wear (when the risk of early detachment is lower), then a stronger acrylic perimeter that activates only after day 7.

• Hydrocolloid borders – These cushion the skin and manage moisture, reducing maceration.

• Prototyping for sensitivity – Before scaling, test your adhesive stack on a panel of users with self-reported sensitive skin. Track erythema and itch scores alongside peel force.

Think of it like riding a bicycle – getting the balance right isn’t trivial, but with the right prototyping partner, you can learn fast and avoid painful (and costly) clinical failures.

Why Your Next Adhesive Component Needs a Specialist Partner

Designing a sensor patch or infusion set adhesive isn’t just about picking a tape from a datasheet. You need:

• Material prototyping – Try 10+ adhesive formulations on skin simulants or volunteers without investing in production tooling.

• Precision converting – Die-cutting complex shapes (with holes for sensors, tabs for removal, and graduated adhesion zones) requires rotary or kiss-cutting expertise.

• Regulatory support – Medical device adhesives must pass ISO 10993 biocompatibility tests. Your manufacturer should provide full documentation for each adhesive they convert.

That’s where 【Deson】 comes in.

We specialize in prototyping and manufacturing custom adhesive components for diabetes wearables – from simple CGM overlay patches to multi-layer, multi-material infusion set backings. Our team has run hundreds of skin adhesion tests and can guide you from a rough CAD file to a production-ready, regulatory-compliant part.

Ready to stick the landing on your next wearable device?
👉 Contact Deson today to start a prototyping project. We’ll help you find the perfect adhesive balance – long enough wear, gentle enough skin, and manufacturable at scale.

Because when 8.4 million lives depend on reliability, you can’t afford to be stuck with the wrong adhesive.