  A new method is presented to manufacture piezoresistive tactile sensors using
fused deposition modelling (FDM)printing technology with two different
filaments made of thermoplastic polyurethane (TPU) and polylactic acid-graphene
(PLA-G) composite. The sensor shows very high sensitivity (gauge factor~550)
and excellent recovery to bending-induced strain and can detect a wide range of
pressures. This new technology opens the door for 3D printing soft robotic
parts capable of tactile communications.
