How to choose and use UV conformal adhesives

Lencolo 2023-07-08 350

UV conformal adhesive is a coating that protects circuit boards from the external environment. Other names include: UV Coating, Conformal Coating, coating adhesive, circuit board protective adhesive, etc. , is a commonly used adhesive in the electronics industry.

Matters needing attention before using UV conformal adhesive

1. Selection of UV conformal glue

2. UV conformal adhesive curing methods (baking curing, UV curing, UV+moisture curing)

3. Selection of coating methods (brush coating, spray coating, dip coating, selective coating, etc.)

4. Carefully check and understand the entire UV conformal adhesive coating process

5. Whether the stability of the UV conformal adhesive is consistent with the test stage

The general problems that affect the coating of conformal adhesive include: cracks, delamination, pollution, capillarity, air bubbles, orange lines, etc.

UV conformal adhesive coating method

1. Brush coating—it is widely used and can produce a good coating effect on smooth surfaces.

2. Spraying - the use of spray cans can be easily applied to small-scale production, and spray guns are suitable for large-scale production, but these two spraying methods require higher accuracy in operation.

3. Dip coating—it can ensure complete coating without causing material waste due to overspraying.

4. Selective coating—accurate coating without wasting materials, suitable for mass coating, but has higher requirements for coating equipment.