The One Cent Coin as a comparison for the miniaturization ratio: To avoid light scattering a so-called black light shield is installed. A tiny adhesive die-cut part by Schreiner ProTech keeps it additionally in position.

Bonding Blog Series: Post 9

Miniaturization-megatrend: the smallest adhesive die-cut part created by Schreiner ProTech to date

Nothing’s impossible, says a well-known advertising slogan. Schreiner ProTech could now claim the same. In response to a customer inquiry for a solution to fix a component in position, the business unit developed the smallest adhesive die-cut part ever created at Schreiner Group.

Credit for the record achievement in miniaturization goes to the experimenters and out-of-the-box thinkers at Schreiner who would not be deterred by conventional standards and came up with an innovative solution in close collaboration with the customer.

To avoid light scattering, the customer installs a so-called light shield in its component. The final product, a wearable medical device, must be capable of withstanding a drop test from a height of 1.6 meters due to a new requirement. Therefore, the customer was seeking a tiny adhesive die-cut part as an additional safeguard to hold the component in place. “Originally, two adhesive areas with dimensions of roughly 2.3 x 2.5 mm were envisioned,” says Sales Engineer Michael Lamke from Schreiner ProTech. Lamke, however, was only able to promise a minimal area of 4 x 4 mm on roll — as Schreiner Group had never produced any precision die-cut parts smaller than that. “Due to the mini dimensions, manufacturing feasibility entailed a high risk. Together with the customer, we subsequently developed a product design that delivers the desired customer value and can be produced in a reliable process as well,” Lamke recalls.

At the end of the development process, the customer’s expectations were not just met but exceeded. By skillfully modifying the physically limited manufacturing processes and utilizing a special-purpose high-precision die-cutting machine an even smaller solution could be achieved which optimally satisfies the customer’s requirement.

Schreiner ProTech is addressing all aspects relevant to adhesive bonding as a joining solution in a series of blog posts. The following questions have been covered to date: What capabilities does an adhesive have to deliver and how does adhesive bonding work? When should adhesive bonding be used and what are the differences between liquid and pressure-sensitive adhesive bonding? What are the key criteria in the selection of an adhesive? What additional functions are possible when using self-adhesive die-cut parts? In addition, we have shown specific examples from various industries. A video illustrated how a machine for application of the adhesive die-cut parts works.

You can find an overview of all blog posts from our adhesive bonding series here: http://www.schreinergroup-blog.com/en/category/subjects/productstechnologies/bonding-en/

Find more information on Schreiner Protech on schreiner-protech.com

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