Common problems with LED glue: causes and solutions

Reasons:
1. The baking temperature is too high or the baking time is too long;
2. The glue ratio is incorrect, too much A glue will easily turn yellow.

Solution:
1. AB glue is cured and demolded within 120-140 degrees/30 minutes.
It will turn yellow if baked for a long time at 150 degrees or above. 2. AB glue is cured and demolded at 120-130 degrees/30-40 minutes. It will turn yellow if baked for a long time at over 150 degrees.
3. When making large lamp heads, the curing temperature should be lowered.

2. LED bubble problem.

Reasons:
1. Bubbles in the bowl: The bracket is not properly dipped in glue.
2. Bubbles in the bracket: The curing temperature is too high, and the epoxy curing is too intense.
3. Glue cracking and top explosion: The curing time is short, and the epoxy resin is not completely or evenly cured. The AB glue has exceeded the usable time.
4. Bubbles on the surface of the lamp head: The epoxy glue is difficult to degas or the user does not use enough vacuum, and the glue preparation time is too long.

Solution: Improve the process or contact the epoxy supplier according to the usage.

3. LED bracket glue climbing.

Reasons:
1. The surface of the bracket is uneven and produces hairiness.
2. The AB glue contains volatile materials.

Solution: Please contact the supplier.

4. The LED package changes color after being baked for a long time after being released from the mold during a short bake.

Causes:
1. The materials are stacked too densely in the oven, resulting in poor ventilation.
2. The temperature in some parts of the oven is too high.
3. There are other color pollutants in the oven.

Solution:
Improve ventilation, remove color stains, and confirm the actual temperature in the oven.

5. Some of the lights on the same row of brackets have coloration or different gelling times, resulting in uneven quality.

Cause: Insufficient stirring.

Solution: Stir thoroughly, paying special attention to the corners of the container.

6. Not easy to demould.

Cause: There is a problem with the AB glue or the glue has not reached the curing hardness.

Solution: Please contact the supplier to confirm the curing temperature and time.

7. Add the same batch and the same dosage of colorant, but the color of the product is different.

Cause: Uneven colorant concentration; or colorant precipitation.

Solution: Warm the colorant and stir it evenly before use.