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Extruded deposition of polymers having continuous carbon nanotube reinforcements

  • US 10,118,375 B2
  • Filed: 01/22/2015
  • Issued: 11/06/2018
  • Est. Priority Date: 09/18/2014
  • Status: Active Grant
First Claim
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1. A deposition fabrication method, comprising:

  • establishing a pressurized stream of a first polymer through a tube, wherein the first polymer has a first melt temperature;

    entraining a carbon nanotube reinforcement within the pressurized stream, wherein the carbon nanotube reinforcement is pre-impregnated with a second polymer that has a second melt temperature, wherein the second melt temperature is higher than the first melt temperature, and wherein entraining is performed above the first melt temperature but below the second melt temperature, wherein as a result of entraining a combined polymer is formed;

    maintaining a third temperature at a material supply end of an entrainment barrel that contains the tube at a higher temperature than a fourth temperature at a material deposition end of the entrainment barrel; and

    depositing a bead of the combined polymer from the tube onto a substrate.

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