Why does EVA hot melt adhesive have wire drawing?

Why does EVA hot melt adhesive have wire drawing? Occasionally, when the nozzle of the equipment is turned off, there may be a small amount of filament residue, causing equipment contamination or sticking to the side of the guide rod, pressure plate, etc., which can cause problems with the appearance and operation of the box that needs to be carried out.

After observing and analyzing this phenomenon, as well as the opinions of industry experts, the main reasons for EVA hot melt adhesive can be attributed to the following aspects:

1、 The working temperature is too low. This situation needs to be improved by increasing the working temperature (not exceeding the specified temperature)

2. The melt viscosity of EVA hot melt adhesive is too high. This situation can be partially alleviated by increasing the working temperature, but the most fundamental solution is to replace the appropriate type of hot melt adhesive

3. The adhered object is too far away from the nozzle. In this case, it is necessary to adjust the distance between the adhesive and the nozzle based on the equipment structure.

4、 The ambient temperature is too low. In the case where the ambient temperature cannot be adjusted, the improvement method can consider increasing the usage temperature, but only limited to the specified temperature, or using other low-temperature hot melt adhesives, especially the curing time.

5、 The nozzle is too dirty. Need to clean the nozzle in a timely manner

6. The nozzle is not closed correctly. Need to clean and overhaul the nozzle

7、 Hot melt adhesive is left in the glue box for too long, and the hot melt adhesive itself has already carbonized and decomposed. In this situation, it is necessary to drain the hot melt adhesive inside the glue box and follow the new glue opening process.