That low co-efficient of friction is where I think it can have a major impact on what can be produced with fused filament 3D printers such as the RepRaps we use. I have visions of moving parts with integral low friction bushings and other surfaces. It is not as low friction as PTFE but has better wear resistance.
The acetal was supplied in 1.75mm filament so the quick change extruder design on the Mendel90 came in handy and I was soon up and printing.
As the picture shows I had to experiment with a number of build surfaces; the advantage of this plastic being slippery in use is a disadvantage when trying to get it to stick to anything! The slight blue tinge to the picture is because it is taken through the acrylic enclosure that I added to our prototype Mendel90, acetal degrades if overheated giving off formaldehyde which you don't want to breathe.
Acetal also takes on moisture readily so I left it in the sealed bag with moisture absorption granules and made a small hole to get the filament out:
