This company produces various equipment for Nasa space missions. It created a process, called «Positrusion», that allows to produce the plastic filament from plastic waste from the station.
Multiple units of this type exist on Earth: FilaMaker, FilaBot, Recyclebot, Filastruder, FilaFab, not to mention the ongoing projects on KickStarter or Indiegogo. Tethers Unlimited is the only one to have developed a sufficiently reliable process to be able to be sent into space. Process is not an industrial process efficiency, but while each kilogram sent into orbit literally costs a fortune, 3D printing and recycling will bring Nasa still unusual flexibility in space.
NASA Selects TUI’s Positrusion Recycler for ISS for Phase II SBIR Award”, Tethers Unlimited release, April 16, 2015
“For Cheaper 3D Printing : A Review of Filament Recyclers”, Inside3DP, July 3, 2014