Material Drying
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Improper production environment control during processing of general-purpose polyethylene general-purpose polyethylene
Problem Phenomenon
Large changes in workshop temperature and humidity cause product quality fluctuations, especially obvious differences in product dimensions and appearance between day and night.
Improper environmental control affects process stability and product consistency.
Cause Analysis
（1）The ambient temperature change affects the mold cooling effect and the product shrinkage rate
（2）The high ambient humidity causes the raw material to absorb moisture
（3）The workshop is not installed with air conditioning or the air conditioning effect is poor
（4）The temperature difference between morning and evening affects the cooling water temperature
（5）Air flow (such as opening and closing doors) affects the stability of the blown film cooling line
Solution
（1）Install an air conditioning system in the production workshop, control the temperature at 20-25°C and humidity ≤60%
（2）Install a constant temperature device in the cooling system to ensure stable cooling water temperature
（3）Control the temperature in separate zones for the injection workshop and the extrusion workshop
（4）Install wind shields in the blown film workshop to isolate external air flow
（5）Establish an environmental parameter recording system and adjust the process parameters in time
Key Takeaway
The production environment is an important factor affecting the processing quality, and a sound environmental control system needs to be established.
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