Material Drying
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TPE uneven color
Fenómeno del problema
Color streaks and color difference in colored products, poor dispersion of color masterbatch, color drift between batches
Análisis de la causa
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
Solución
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
Conclusión clave
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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