Injection Molding
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EEA Obvious Surface Color Difference
Problem Phenomenon
Different parts of EEA products have different color shades, color difference ΔE>5
Cause Analysis
Uneven dispersion of color masterbatch; pigment orientation during injection causes uneven color distribution; barrel temperature fluctuation causes color change
Solution
1) Use the masterbatch method for color masterbatch to ensure uniform dispersion; 2) Reduce injection speed to reduce pigment orientation; 3) Stabilize barrel temperature within ±2°C
Key Takeaway
Color difference is caused by uneven dispersion and orientation; masterbatch method and stable processing are key
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