Adhesives for Medical Wearables
Medical wearables and mini diagnostic devices, such as diabetes sensors for monitoring blood glucose levels, are becoming increasingly popular. Of course, it must be ensured that the devices are reliable at all times, while at the same time being safe for close use on the body. Hoenle has developed a broad portfolio of special adhesives that meet the high requirements and demands of manufacturers and users.
Hoenle adhesives are suitable for bonding on printed circuit boards, as well as for bonding enclosures or bonding syringe needles.
Biocompatible UV adhesives
The quality of medical wearables starts with production. Medical adhesives from Hoenle have very good adhesion to the most commonly used materials, usually plastics, stainless steel, glass or ceramics. They are also biocompatible and have already been tested according to ISO 10993-4/-5/-10/-23 and/or USP Class VI.
Every manufacturing process requires specially developed adhesives: from UV acrylates and UV epoxies to electrically conductive products and conventional heat-curing epoxies, Hoenle offers suitable adhesives for all applications. UV adhesives are ideal for bonding needles or housings for wearables, as they cure very quickly under UV radiation and are therefore ideal for fast cycle times and large-volume production. Fluorescing versions are available to enhance quality control relying on in-line vision systems.
Here you can find more information about our adhesives for needle bonding and housing bonding.
Conductive Adhesives with medical grade
In addition to UV adhesives, thermally curing epoxy resin adhesives are also used for bonding printed circuit boards. Depending on the application, it is important to ensure that the adhesive has a high ionic purity in order to avoid corrosion. Electrically conductive adhesives, on the other hand, are usually silver-filled and can therefore replace solder joints or even be applied to flexible wearables as flexible conductive tracks.
Read more about our adhesives for PCBs and FlexPCBs here.
Watch our video to see how smallest amounts of adhesive can be dispensed with a Scheugenpflug (now Atlas Copco) dispenser
Selection of our best adhesives for medical wearables
The table below provides an overview of medical grade adhesives that are certified to ISO 10993 and/or USP Class VI and that are most commonly used for manufacturing medical wearables:
| Adhesive | Usage | Viscosity [mPas] | Base | Curing | Special Properties |
|---|---|---|---|---|---|
|
400 (LVT, 25 °C, Sp. 2/60 rpm) | cyanoacrylate | atmospheric moisture / room temperature |
|
|
|
paste-like | 2-component epoxy | thermal |
|
|
|
30,000-45,000 (LVT, 25°C, Sp. 4/6 rpm) | epoxy | thermal |
|
|
|
150-300 (Brookfield LVT, 25 °C, Sp. 2/30 rpm) | epoxy | UV secondary heat cure |
|
|
|
700-1,400 (LVT, 25°C, Sp. 3/30 rpm) | acrylate | UV VIS |
|
|
|
70 (Rheometer, 25°C) | acrylate | UV VIS |
|
|
|
85 (Rheometer, 25°C) | acrylate | UV/VIS |
|
*UV = 320 – 390 nm VIS = 405 nm
Our Bonding and Curing System Solutions
Hoenle provides complete adhesive bonding solutions for optimal production efficiency and productivity. Pairing Hoenle UV Medical grade adhesives with the appropriate Hoenle UV or LED curing system ensures that the adhesives are thoroughly cured in the shortest possible cycle time. Hoenle curing equipment offers a full range of curing wavelengths, adjustable intensities, and is cleanroom compatible. The equipment is programmable with full monitoring capability to maintain the highest level of process control.
Contact And Support
Do you have any questions or need support for our bonding solutions? We are happy to help you.
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