1. The temperature control is too high (especially the feeding section);
2. The plastic has moisture when it returns to moisture;
3. Long-term parking, the dissolved plastic is not cleaned and cleaned;
4. The geographical environment has high environmental humidity;
5. There is ice or too high vapor content in the cable core.
For the above reasons, the temperature of each section of the extruder screw should be effectively controlled; the common raw materials should be pre-dried early; the actual operation regulations of the strict processing technology should be improved to improve the ability to assess the level of plastic melting; pay attention to the production environment and the storage and logistics of raw materials Standards, etc.
