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Causes of carbides in hot melt adhesive composite machine

Date:2021-06-02
Info:
   The hot melt adhesive composite machine has been used for a long time, and a layer of black mater

  

  The hot melt adhesive composite machine has been used for a long time, and a layer of black material will be produced around the glue barrel. These are some carbides. Then how do these carbides form? How can we avoid excessive carbonization? What about things?

Composite Machine

  The main causes of carbonization or even gelation of hot melt adhesives are as follows:

  1. The temperature of the plastic tank is too high, the temperature control is faulty, the actual temperature is lower than the displayed temperature, or the temperature is too high to take control.

  2. The glue layer on the surface of the hot melt glue box is carbonized, and the thermal stability of the glue itself is not good. The hot melt glue stays in the glue box for a long time.

  3. There are two different types of hot melt glue in the glue box of the hot melt glue composite machine.

  To avoid the production of excessive carbides, we need to do the following in the daily glue application process:

  1. The glue temperature is set in accordance with the specified technical parameter values. When there is abnormal phenomenon such as carbonization, check the difference between the temperature control and the actual temperature. ,

  2. The lid of the glue box is closed at any time to prevent the high-temperature hot melt glue on the surface from contacting with fresh air and accelerate oxidation.

  3. When using a small amount of glue for a long time, do not add too much hot melt glue in the glue box, and add it several times between one-third and one-half.

  4. After cleaning the hot melt adhesive that has been repeatedly heated for a long time, replace it with a new one. Do not use two different types of hot melt adhesive.


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Home / News / Industry News

Causes of carbides in hot melt adhesive composite machine

  

  The hot melt adhesive composite machine has been used for a long time, and a layer of black material will be produced around the glue barrel. These are some carbides. Then how do these carbides form? How can we avoid excessive carbonization? What about things?

Composite Machine

  The main causes of carbonization or even gelation of hot melt adhesives are as follows:

  1. The temperature of the plastic tank is too high, the temperature control is faulty, the actual temperature is lower than the displayed temperature, or the temperature is too high to take control.

  2. The glue layer on the surface of the hot melt glue box is carbonized, and the thermal stability of the glue itself is not good. The hot melt glue stays in the glue box for a long time.

  3. There are two different types of hot melt glue in the glue box of the hot melt glue composite machine.

  To avoid the production of excessive carbides, we need to do the following in the daily glue application process:

  1. The glue temperature is set in accordance with the specified technical parameter values. When there is abnormal phenomenon such as carbonization, check the difference between the temperature control and the actual temperature. ,

  2. The lid of the glue box is closed at any time to prevent the high-temperature hot melt glue on the surface from contacting with fresh air and accelerate oxidation.

  3. When using a small amount of glue for a long time, do not add too much hot melt glue in the glue box, and add it several times between one-third and one-half.

  4. After cleaning the hot melt adhesive that has been repeatedly heated for a long time, replace it with a new one. Do not use two different types of hot melt adhesive.



Dongguan Chuanbo Machinery Equipment Co., Ltd.