The reason and solution of common problem of LED glue

The reason and solution of common problem

Part one. Yellowing and LED. 

The reason:

1, The baking temperature too high or too long;

2, The ratio of matching glue is wrong, if you use more A glue, it is prone to change yellow.

Solution:

1, AB glue can be cured and mold release within 30 minutes in 120-140 degrees,  more than 150 degrees baking for a long time is prone to change yellow.

2, AB glue can be cured and mold release within 30-40 minutes in 120-130 degrees,  more than 150 degrees baking for a long time is prone to change yellow.

3, when making a large lamp holder, you have to reduce the curing temperature.

Part two, LED bubble problem.

The reason:

1. The bowl bubble: bad stents dipping glue.

2. Stent bubble: curing temperature is too high, epoxy curing is fierce exceed.

3. The plastic crack, blasting cap: short curing time, epoxy resin curing incompletely or unevenly. AB glue is beyond the usable time.

4. Lamp holder surface bubbles: epoxy adhesive is hard to defoam or user use vacuum degree is not enough, and time of matching glue is too long.

Solution: according to the usage condition, improve the process or contact with epoxy suppliers.

Part three, LED encapsulation short baking from the mold after long roast and color change.

The reason:

1, Oven inside is too dense, poor ventilation.

2, The temperature of oven is too high.

3, other color pollution substances exist in the oven.

Solution:To improve the ventilation. Remove dirt, confirm the actual temperature in the oven.

Part four, one row of lights on the scaffold, color phenomenon or gel time is different, uneven quality.

Reason: insufficient mixing.

Solution: fully stir well, especially pay attention to the corners of the container.

Part five, not easy to release.

Reason: AB glue problems or rubber is not up to curing hardness.

Solution: please contact with the supplier and confirm the curing temperature and time.

Part six, add the same dose and the batch of color agent, but the product color is different.

Reason: The concentration of color agent is unevenly; color agent has precipitation.

Solution: heating the color agent, stir well before use.