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Layer Adhesion

Definition

Layer adhesion is the bond strength between consecutive deposited layers in a 3D printed part, determining the part's structural integrity in the Z-axis (vertical) direction.

In Practice

FDM parts are inherently weakest between layers (the Z-axis). Poor layer adhesion causes delamination — layers separating under stress. Key factors affecting adhesion: nozzle temperature (higher = better adhesion, but risk of stringing), layer height (thinner layers = more surface contact = stronger bonds), cooling fan speed (less cooling = better adhesion for ABS/nylon), and material moisture content (wet nylon produces steam bubbles between layers). The Epicblaze v1's enclosed chamber maintains ambient temperature, dramatically improving layer adhesion for engineering materials compared to open-frame printers.

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