In a recent blog, we discussed four reasons for adhesive failure. While unlikely with today’s advanced solutions, adhesive failure can still sometimes happen.
Take a look at tips for ensuring a surface is ready for adhesion.
- Make sure the surface has good wetting properties
An adhesive’s success is largely dependent upon its ability to wet out a surface. This means that the adhesive must be able to flow out across the substrate surface and penetrate into its material.
To verify good wetting properties, you’ll notice that the adhesive doesn’t form beads on the substrate surface. Instead, it distributes itself evenly across the surface.
- Understand the surface’s bonding properties
In addition to an adhesive needing good bonding properties, it’s important for the surface to as well. To ensure a surface’s bonding properties, verify that it has intermolecular and chemical interactions with the adhesive molecules.
- Ensure the surface won’t unaccountably change
Another way to ensure adhesion is to make sure the surface doesn’t change in an uncontrolled way. For example, if the surface deteriorates when exposed to moisture, the adhesive will fail. In addition to understanding how the surface responds to environmental changes, it’s important to take measures to avoid a surface change.
- Consider pretreatment methods
While smart adhesives often don’t require a primer, one may be needed to ensure adhesion. Additionally, surface preparation and pretreatment methods can be used, such as:
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