Think of textile manufacturing in the South and you may picture cotton mills in North Carolina. In Chattanooga, Tennessee, the industry includes something very different: ESpin Technologies, a 19-employee outfit that makes nanofibers–filaments of polyester, nylon or other polymers that are only 20 to 200 nanometers wide. To perfect the design of a filter, ESpin got computational engineers at the Sim-Center at the University of Tennessee at Chattanooga to model thousands of air-and liquid-flow variables.
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