The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2003
Filed:
May. 07, 1999
Stephen H. Foulger, Lexington, SC (US);
Pirelli Cables & Systems, LLC, Columbia, SC (US);
Abstract
A conductive polymer composite material for semiconductive jackets for cables which has a significant reduction in conductive filler content while maintaining the required conductivity and mechanical properties specified by industry. Materials and processing approaches are selected to reduce the percolation threshold of the conductive filler in the composite, while balancing the material selection with the industry-required mechanical properties of the semiconductive jacket. The semiconductive jacket material comprises a minor phase material which is a semicrystalline polymer; a conductive filler material dispersed in the minor phase material in an amount sufficient to be equal to or greater than an amount required to generate a continuous conductive network in the minor phase material; and a major phase material which is a polymer which when mixed with the minor phase material will not engage in electrostatic interactions that promote miscibility. The major phase material has the minor phase material dispersed therein in an amount sufficient to be equal to or greater than an amount required to generate a continuous conductive network in the major phase material, forming a semiconductive jacket material of a ternary composite having distinct co-continuous phases.