Induction of auxetic response in needle‐punched nonwovens: Effects of temperature, pressure, and time

  title={Induction of auxetic response in needle‐punched nonwovens: Effects of temperature, pressure, and time},
  author={Prateek Verma and Meisha L. Shofner and Angela Lin and Karla B. Wagner and Anselm C. Griffin},
  journal={physica status solidi (b)},
We have examined the effect of temperature, pressure, and time on the magnitude of induced auxetic response in post‐manufacture‐processed needle‐punched nonwovens. Different combinations of these processing parameters – temperatures ranging from room temperature to above the glass transition temperature (Tg) of constituent fibers, pressure of 0.49 or 2.45 MPa, and duration of 4 or 24 h – were used to process these nonwovens. This resulted in some permanent compression (defined as “compression… 

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