Extrusion & Post
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PETG extruded pipe surface corrugation
Problem Phenomenon
Periodic or continuous corrugated textures appear on the surface of PETG extruded pipes.
Cause Analysis
Extrusion speed too high causing melt fracture, die temperature low, haul-off speed not matching extrusion speed.
Solution
Reduce the extrusion speed or increase the die temperature; match hauling with extrusion speed; polish the die to reduce friction.
Key Takeaway
PETG pipe surface corrugation is the result of poor coordination between extrusion and hauling.
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