PA6 (FDM)

PA6 printed by fused deposition modeling is a semi-crystalline polyamide extruded as filament and deposited layer by layer. Bonding between layers is weaker than within each deposited road, so strength and toughness are lower along the build direction, and parts show visible layer lines and small voids between roads. PA6 takes up moisture readily and shrinks and warps as it crystallizes, so printing usually calls for dried filament, a heated bed and a controlled chamber, with removable supports under overhangs. Printed parts are used for functional prototypes, jigs and fixtures, wear parts and durable housings or brackets.