Processing Machinery
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Wide Temperature Window of High-Density Polyethylene PE Raw Material Causing Difficulty in Process Parameter Optimization
Problem Phenomenon
PE materials have a wide processing temperature range (180-260°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）Operators set the temperature based on experience
（4）The temperature is not optimized according to product characteristics and quality requirements
（5）The matching relationship between temperature and screw rotation 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）When the product is thin-walled, appropriately increase the temperature to improve flowability
（4）When the product is thick-walled, appropriately reduce the temperature to reduce shrinkage
（5）Standardize temperature adjustment records and establish archives of optimal process parameters
Key Takeaway
PE temperature window optimization needs to be advanced from two aspects: systematic experiments and experience accumulation.
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