Extrusion & Post
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PAN precursor fuzz
Problem Phenomenon
Fuzz appears on the precursor surface, affecting carbon fiber quality
Cause Analysis
Coagulation too fast forms a hard skin that peels off during post-drawing producing fuzz; friction between fibers
Solution
Optimize the coagulation bath conditions to be appropriately mild; reduce fiber friction on the guide rolls
Key Takeaway
Fuzz is an inherent defect of carbon fiber strength and processability
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