Production & Quality
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CEF repeated processing performance decay
Problem Phenomenon
After CEF is recycled and reprocessed 3-4 times, the tensile strength decreases by 25-30%
Cause Analysis
Molecular chains break and degrade under repeated high-temperature shearing; the antioxidant is exhausted in multiple processing; cumulative effect of thermo-mechanical degradation
Solution
1) The proportion of recycled material does not exceed 20-30%; 2) Supplement 0.1-0.2wt% antioxidant for each re-extrusion; 3) Reduce the processing temperature by 5-10°C; 4) Reduce the screw speed to reduce shearing
Key Takeaway
The performance decay of multiple processing is caused by thermo-mechanical degradation; limiting recycled material and supplementing antioxidants are the key
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