Extrusion & Post
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Interlayer fluctuation of PETG multi-layer co-extrusion composite film
Problem Phenomenon
The thickness ratio of each layer of the multi-layer film fluctuates, and the barrier performance is unstable.
Cause Analysis
The output of each extruder fluctuates, the flow channel of the composite distributor is unstable, and the temperature fluctuation causes viscosity change.
Solution
Stabilize the output of each extruder; check the distributor; control the temperature stability.
Key Takeaway
The stability of the layer thickness ratio of PETG multi-layer film is the guarantee of barrier performance.
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