Why does the hot melt adhesive of the hot melt adhesive laminating machine carbonize?

Why does the hot melt adhesive of the hot melt adhesive laminating machine carbonize?

People who often use hot-melt adhesive laminators will know that after a long time of using the equipment, they will see a layer of black material around the rubber barrel. These are some carbides, many people will be confused about what these carbides are. What should we do to reduce the production of excessive carbides?

The main reasons for the phenomenon of carbonization gelation of hot melt adhesives are as follows: the temperature of the tank is too high, the temperature control is faulty, the actual temperature is lower than the display temperature, the temperature is too high to play a control role. The glue layer on the surface of the glue box is carbonized, the heat stability of the glue itself is good. The hot melt glue stays in the glue box for a long time.

There are two different types of hot melt adhesive in the hot melt adhesive laminator. For the above reasons, the following aspects need to be done in the daily glue application process:

The glue temperature is set according to the specified technical parameter value. Check the difference between the temperature control the actual temperature when there are abnormal phenomena such as carbonization. The lid of the glue box is closed to prevent the high temperature hot melt adhesive on the surface contacting with fresh air to accelerate oxidation. When using glue, do add too much hot-melt adhesive in the tank. Add between 1/3 half to maintain it multiple times. After hot-melt adhesive that has been heated repeatedly for a long time, clean it change the adhesive. Do use two A variety of hot melt adhesives.