Extrusion & Post
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Uneven dyeing of PET fiber
Problem Phenomenon
After PET fiber dyeing, color flowers and color differences appear, and color fastness is poor.
Cause Analysis
Fiber crystallinity and orientation degree are uneven, causing dye uptake differences; spinning cooling conditions fluctuate; draw ratios are inconsistent.
Solution
Stabilize spinning process parameters (temperature, cooling air, speed); control draw ratio consistency; select color masterbatch with good dispersibility.
Key Takeaway
PET fiber dyeing uniformity depends on the uniformity of the fiber microstructure.
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