| 摘要 |
A polymer composition comprises a substantially non-conductive polymer binder and at least two electrically conductive fillers, wherein a first electrically conductive filler comprises particles with a void bearing structure and a second electrically conductive filler comprises substantially spherical particles. The conductivity of the composition, when in an unstressed state, is related to the conductivity of the polymer binder but it is related to the conductive filler when stressed. The first electrically conductive filler may be spiky nickel, more preferably nickel 123 or nickel 255, with a particle size of about three microns. Typically, the second electrically conductive filler comprises magnetite with a particle size of five microns or less. The polymer binder may be polyurethane, polyvinyl acetate, polyvinyl chloride, acrylic polymer, natural rubber, or silicone. A force sensor comprising the polymer composition and electrical connections thereto is also disclosed. |
