Extrusion & Post
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PA6 Co-Extruded Composite Film
Fenómeno del problema
The PA6/PE co-extruded film has uneven interlayer thickness during extrusion
Análisis de la causa
The melt viscosity difference between PA6 and PE is large, the interface is unstable during co-extrusion, and improper flow distribution of each layer in the die causes uneven layer thickness; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
Select viscosity-matched co-extrusion grades; adjust the extrusion temperature of each layer to narrow the viscosity difference; precisely adjust the layer ratio with the die distributor; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
Co-extrusion layer thickness uniformity relies on viscosity matching and die distribution control; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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