What is a UV adhesion promoter ?
Like a conventional adhesion primer (or promoter), a UV primer is a coating that improves the performance of an adhesive tape or glue on a surface, especially during difficult assembly (low surface energy substrates). It is applied prior to the application of your adhesive solution.
UV primers have a fluorescent indicator that make them visible under ultraviolet light. This allows you to easily check that the primer has been properly applied with a UV lamp. This improves quality control in the industry.
How to apply a UV adhesion primer ?
First of all, your surface must be cleaned, degreased and dry with apppropriate cleaners and degreasers for industry.
Next steps :
- 1. Shake the bottle of primer.
- 2. Apply the primer to the surface: apply the minimum amount that will cover the entire surface.
- 3. Check the distribution of the product with a UV lamp, using UV protection goggles and other protective accessories if necessary.
- 4. Wait for the UV primer to evaporate completely (30 to 90 seconds depending on the ambient temperature)
- 5. Optional : If two applications are required for an even distribution (e.g. porous surfaces), wait for the first coat to dry before applying the next one.
- 6. Apply your industrial adhesive tape or glue to complete your assembly.
When is a UV primer useful ?
A UV adhesion primer is generally designed to be used on a wide range of surfaces. For this reason, it is less colored, or even completely transparent, than most conventional primers that are colored, but often intended for a more limited number of applications.
Its integrated UV indicator allows for effective control of the primer's application. This improves productivity and quality control :
- For companies that outsource primer application
- For in-house production departments
- When checking primed surfaces several days or weeks after application
You can use a UV primer to strengthen your bond on polypropylene, ABS, PET/PBT and many low-adhesion substrates.
Always read the data sheet of the UV primer you are using to check exactly what materials it is compatible with.
- Lint-free cloth, brush, applicator pad, pressure gun, roller or other applicator tool
- UV flashlight
- Gloves, UV goggles and possibly a respirator
- Other protective accessories for prolonged exposure to UV radiation
Safety and precautions for use
- The use of the UV lamp does not participate in the polymerization of the primer. The purpose of this action is only to check the application of the product.
- The UV primer can be removed with acetone (do a test to make sure it will not damage the surface).
- Use the UV primer away from flames and heat sources.
- Avoid contact with eyes, skin and respiratory tract.
- Wear protective gloves.
UV exposure :
For a UV product emitting 10mW/cm², the legal limit of daily exposure is 2 minutes for the eyes and 12 minutes for the skin.
Beyond that time, you should use UV protection adapted to your exposure to ultraviolet rays : glasses, mask, gloves, suit...