Technology Produces Electrically Conductive Polyester

New polyester compositions feature desired electrical characteristics without unduly deteriorating the other valued melt viscosity, processing, and shaped article properties. The electrically conductive polyester has strong conductivity at low carbon black loading. The use of carbon black with specific physical properties is critical for achieving the desired mix of electrical and processing traits. The carbon black component may be added at the monomer stage, such as with the dicarboxylic acid or with the glycol, or to the initial (trans)esterification product.

The films of the polyester compositions may be used in EMI shielding, microwave antennas, radomes, sunshields, and packaging for electrically sensitive products. The films may also be used for laser marking and identification purposes. The fibers based upon this technology are anti-static and anti-soiling.

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