Larger Nozzles = Better Layer Adhesion

Using a larger nozzle in 3D printing can result in better layer adhesion primarily due to the increased extrusion width and thicker layers. When the nozzle diameter is larger, it deposits a wider bead of molten filament, which creates a greater surface contact area between successive layers. This increased area facilitates better bonding as more molten material from one layer fuses into the previous layer, enhancing the overall mechanical strength of the print. Thicker layers associated with larger nozzles also mean fewer total layers in the print, which reduces the cumulative number of potential weak interfaces that could cause delamination or layer separation. Therefore, parts printed with larger nozzles often demonstrate improved inter-layer strength because there are simply fewer opportunities for adhesion failures across layers.