The 3D Printing of Freestanding PLLA Thin Layers and Improving First Layer Consistency through the Introduction of Sacrificial PVA

Fused filament fabrication (FFF) is an inexpensive way of producing objects through a programmed layer-by-layer deposition. For multi-layer, macro-scaled prints, acceptable printing achieved provided, amongst other factors, first layer adhesion sufficient to fix part the surface during printing. However, in deposition structures with single or few layers, consistency significantly more important and issue that has been previously overlooked. As layer-to-bed prioritised printing, thin are difficult remove without damage. The controllable potential tissue engineering use bioactive filaments incorporation microfeatures into complex, patient-specific scaffolds. This paper presents techniques progress thin, reproducible structures. linear thickness variation 3D-printed PVA PLLA layers presented as function extrusion factor vertical distance moved by nozzle between (the separation). A sacrificial shown improve consistency, reducing onus on fine printer calibration layers. In this way, printed bed deviation drastically reduced. Further, technique used demonstrate freestanding ~25 µm thickness.