Extrusion & Post
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PEEK 3D printing poor interlayer bonding force
Problem Phenomenon
3D printed parts delaminate between layers, with extremely low Z-direction strength
Cause Analysis
The previous layer has fully cooled and crystallized, unable to achieve effective diffusion and entanglement with subsequent layers; the printing chamber temperature is insufficient to maintain the interface temperature
Solution
Increase the printing chamber temperature to above 140°C (even close to Tg=143°C) to keep the interlayer in a semi-molten state; reduce the layer thickness (such as 0.1mm) to increase heat penetration; overall annealing after printing
Key Takeaway
Interlayer bonding is the core technical difficulty of PEEK additive manufacturing
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