The FibreTuff has similar properties to Nylon 11 or 12. The specific gravity of FibreTuff I is 1.08 g/cc. This comparison chart shows significant opportunities to pursue both Laser Sintering and FDM. The FibreTuff I has similar properties to Nylon 11 or 12.
Injection Molding FibreTuff
Without a reinforcement and/or filler FibreTuff has a Tensile Strength at yield ASTM D638 of +5,000 psi. With a glass fiber reinforcement, the Tensile Strength can be + 7,000 psi. This Tensile Strength value is present at 42%, 34% and 28% wood flour. These properties show a linear plot versus existing technology which declines in Tensile Strength with increase in wood flour loading levels.
3D Printing FibreTuff
FibreTuff can be 3D Printed with various break away materials or support structure polymers to help with the vertical printing in Z direction. Standard breakaway for the Ultimaker 3D Printers can be used.
Recommended processing conditions.
The nozzle size should be .4 or .5mm with temps at 225- 235C.
The printer bed should be heated at 90 -100C.
Cooling Fan on for first few layers than turned off
Recommended layer height .1 - .2mm
Printer oven is desired - temps 80C.
Printing speeds 45 -50 mm/sec
Density or infill is at 90 - 93% infill
Recommend Adhesive or Ultimaker breakaway / PVA
Ultimaker 3D Printer using FibreTuff I at the RAPID conference in Detroit May 2019. The part printed utilized a nozzle temp of 245c with 80c heated bed temperature. The FibreTuff I will be offered in the Ultimaker Materials Alliance in the Fall 2019
3D Printer using the FDM method for producing a anatomical calcaneus bone model made with FibreTuff. A 235c nozzle temperature @ 100 c bed temperature. Fan off when printing at a 44 mm/sec print speed
FibreTuff used in a Laser sintering 3D printer process to produce a Femur bone.