LED power supply product filling problem

Problems that may occur during the encapsulation of two-component potting:

The main agent after curing is too soft / the surface is too sticky

The first method: rapid curing at 60-80 ° C for 1-2 hours;

If no further curing occurs, the possible causes are: the mixing ratio is incorrect, or the main agent is not evenly mixed before mixing.

If the main agent or curing agent reacts with other chemicals (such as solvents, strippers, greases or other incompletely cured base agents), this also affects the curing effect.

After curing, it is only partially hard, but still has a very soft part.

This can occur if the main agent and curing agent are not mixed evenly after mixing.

Re-test, mix the main agent and curing agent evenly to form a homogeneous mixture, then pour it into another cup and stir it for a while.

Bubbles after curing

The main reasons for bubble generation:

1. Air is introduced into the air, and the air is not completely removed during the injection of the product and throughout the curing process. Phenomenon: very small bubbles.

2. The reaction between moisture and curing agent produces a gas. Phenomenon: very large bubbles.

The first reason is to create a bubble solution:

It is recommended to evacuate the main agent and the curing agent after they are stirred together.

Preheating the product to be potted will help the air escape.

Curing in a room with a lower temperature and humidity to allow sufficient time for the air to escape.

The second reason is to solve the bubble:

There are several possibilities below for moisture and curing agent reactions.

a, the main agent has been used many times, each time there is moisture in the mixing process. It is also possible that the lid of the package is not tightly closed. To prove what the cause is, mix the main and curing agents in a dry cup and dry them in an oven (60-80 ° C) as described above. If the bubble still occurs, the main agent has deteriorated at this time, please do not use it again.