Hot melt glue: causes and solutions of carbonization in the process of use

For people who often use hot melt glue will know, hot melt glue machine after a long time will see a layer of black material around the glue barrel, these are some carbide, many people will be confused, these hot melt glue carbide is how to form it, we should how to avoid producing too much carbide it. In fact, the answer is mainly from the following aspects.

Q: The main reasons for hot melt glue to produce carbonization or even gelation are as follows

1、Hot melt glue box temperature is too high

2、Temperature control failure, the actual temperature is lower than the display temperature, or the temperature is much higher to play a control role

3、Hot melt glue glue box surface of the glue layer carbonization

4、The thermal stability of the hot melt glue itself is not good

5、Hot melt glue inside the glue box for a long time

6、There are two different kinds of hot melt glue inside the glue box

A: For the above reasons, the following aspects need to be done in the daily process of using glue

1、Glue temperature setting according to the specified technical parameter values.

2、Check the difference between temperature control and actual temperature when there is abnormal phenomenon such as carbonization.

3、Close the lid of the glue box at any time to avoid the contact between the high temperature hot melt glue on the surface and fresh air, which will accelerate the oxidation.

4、A small amount of rubber for a long time, the amount of hot melt glue added to the glue box should not be too much, between one-third to half of the multiple additions to maintain can be, has been repeatedly heated for a long time to clean out the hot melt glue for new glue.

5、Do not use two different nature of the hot melt glue .

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