Material Drying
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TPE uneven color
Problem Phenomenon
Color streaks and color difference in colored products, poor dispersion of color masterbatch, color drift between batches
Cause Analysis
Poor dispersion of TPE color masterbatch: poor compatibility between the masterbatch carrier and the base material, insufficient screw back pressure, poor mixing uniformity; dry-mixed color powder is more prone to unevenness; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①select a masterbatch carrier with good compatibility; ②increase screw back pressure to strengthen dispersion; ③use coupling agents and compatibilizers; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
TPE color matching relies on carrier compatibility and back pressure dispersion; coupling agents are a chemical means to improve bonding; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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