Where to start with exotic materials? The more exotic in general the more of a pain they are to print with. The hotter the bed and nozzle temp needs to be the more susceptible to small changes in ambient temperature. For instance, it seems like it wouldn’t make a difference but having your printer near a door will cause drafts to effect your print if the door opens. For this reason an enclosure is absolutely crucial to getting good results with exotic materials, in fact I would suggest an enclosure as the first upgrade anyone makes to their printer, this will help you to achieve consistent results with any material.
Most exotic materials are abrasive materials, Carbon Fibre or glass fibre infused materials will wear your extruder down very fast if you are not prepared for them. Ruby tipped nozzles and hardened steel extrusion gears are needed to keep things working nicely.
Material choice for Esk8
I see a lot of discussions here about 3d printing for esk8 and what material is best. A lot of people think PLA = weak but this is not the case; its actually a very strong material with a high tensile strength but suffers from low durability and shatters easily. Also PLA has a low glass temperature which means that it will melt and deform easily in a hot car or room. This, in my opinion, makes PLA almost useless for our applications and is why I discourage its use in electric skateboard parts. I have used many materials in the past across lots of applications and I will give a list bellow with my thoughts
PLA - deforms easily and shatters even easier, stay away for anything other than decorative pieces
PET - A great material choice for many applications, its strong and tough and can be easily printed on almost any printer. This makes it an ideal candidate.
ABS - Horrible environmentally unfriendly material, warps very easily during printing but is strong. Enclosure needed
Nylon - Absolutely excellent material, for me the holy grail of printing materials. Complies slightly (will flex) and is incredibly strong - I print 90% of my functional parts in Nylon. Difficult to print requiring high temperatures. Glossy finish. Enclosure needed
PC - Polycarbonate is also a fantastic material to use, incredibly strong and durable, can be difficult to print, enclosure needed
TPU - excellent material for flexible parts, 3d cross infill at low infill settings creates spongy material. Great for gaskets and protectors.
For Esk8 applications I recommend a minimum of 60% infill. I print any drivetrain components only in Nylon, at 100% infill. Most of your print strength comes from the number of walls, always print a minimum of 3 walls, I normally do 6 if I am not doing 100% infill.