Peratech Limited

Paul Laughlin

David Lussey

David Bloor

Cyril Hilsum

Adam Graham

Philip James Walton Hands

A polymer composition comprises at least one substantially non-conductive polymer binder and at least first and second electrically conductive fillers. The first electrically conductive filler is comprised of particles having avoid-bearing structure; and the second electrically conductive filler is comprised of particles which are acicular in shape.

Polymer composition

An electrically responsive composite material is disclosed, along with a method of producing an electrically responsive composite material, a transducer having a substrate for supporting a flowable polymer liquid and a method of fabricating a transducer. The electrically responsive composite material produced is configurable for application in a transducer. The method includes the steps of receiving the flowable polymer liquid and introducing electrically conductive acicular particles () to facilitate the conduction of electricity by quantum tunneling. Dielectric particles () are added of a size relative to the acicular particles such that a plurality of these dielectric particles are dispersed between adjacent acicular particles.

Electrically responsive composite material, a method of manufacture and a transducer produced using said material

A sensor for chemical species or biological species or radiation presenting to test fluid a polymer composition comprises polymer and conductive filler metal, alloy or reduced metal oxide and having a first level of electrical conductance when quiescent and being convertible to a second level of conductance by change of stress applied by stretching or compression or electric field, in which the polymer composition is characterized by at least one of the features in the form of particles at least 90% w/w held on a 100 mesh sieve; and/or comprising a permeable body extending across a channel of fluid flow; and/or affording in-and-out diffusion of test fluid and/or mechanically coupled to a workpiece of polymer swellable by a constituent of test fluid.

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Houghton-le-Spring, United Kingdom

Paul Laughlin