This tag is for questions regarding 3D printing of polycaprolactone (PCL)

Polycaprolactone (PCL) is a biodegradable polyester with a low melting point of around 60 °C and a glass transition temperature of about −60 °C. The most common use of polycaprolactone is in the manufacture of speciality polyurethanes. Polycaprolactones impart good resistance to water, oil, solvent and chlorine to the polyurethane produced.

PCL rod feed stock was one of the first raw materials extruded through a RepRap extruder. PCL is of potential interest to the RepRap community because the low melting point makes it somewhat easier to extrude. A low melting temperpature reduces the burden on the extruder, potentially allowing simpler (and thus easier to replicate) extruder mechanisms. While interesting from a research standpoint, this is not a significant design driver for the current RepRap and RepRap-like 3D printers that are available. The vast majority of low-cost 3D printers currently in operation use PLA and ABS.

PCL can be mixed with carbon black to make a printable conductive filament called carbomorph, as described in this paper: A Simple, Low-Cost Conductive Composite Material for 3D Printing of Electronic Sensors.