Processing Machinery
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Wide temperature window of general-purpose polyethylene PE raw material causing difficulty in process parameter optimization
Problem Phenomenon
PE materials have a wide processing temperature range (160-260°C), and there is a lack of basis for how to select the optimal temperature in actual operation.
Improper temperature selection damages energy consumption, product quality, and production efficiency.
Cause Analysis
（1）The optimal processing temperature of different PE grades is different
（2）The temperature setting lacks a systematic method
（3）The operator sets the temperature based on experience
（4）The temperature is not optimized according to the product characteristics and quality requirements
（5）The matching relationship between temperature and screw speed is not clear
Solution
（1）Establish a processing temperature database for each PE grade
（2）Optimize the temperature of each section through design of experiments (DOE)
（3）Appropriately increase the temperature for thin-walled products to improve flowability
（4）Appropriately lower the temperature for thick-walled products to reduce shrinkage
（5）Standardize the temperature adjustment records and establish the best process parameter archives
Key Takeaway
PE temperature window optimization needs to be promoted from two aspects: systematic experiments and experience accumulation.
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