Material Drying
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PA6 Color Powder Dispersion
Fenómeno del problema
After producing natural-colored material with added color powder, the products show color streaks and color difference, and the color drifts between batches
Análisis de la causa
Color powder disperses unevenly in the low-viscosity PA6 melt, forming color streaks; batch fluctuations in drying and melt temperature change the base hue, and superimposed dispersion problems amplify the color difference
Solución
①Switch to color masterbatch instead of color powder to improve dispersion; ②lock the drying and melt temperature parameters; ③match colors on the first article and establish a color difference acceptance standard; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
PA6 coloring prioritizes the color masterbatch route; parameter locking and the first article color matching system control color difference within the acceptance band; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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