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Semi-Foamed Polyethylene Molding Tape.
Patent, Filed 12 Dec 86, patented 26 Jul 88,
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
The present invention relates to an insulated covering for electrical hardware and more particularly to a tape covering for bonding a cable jacket to the strength member of an electrical connector for use in a cable system that is buoyant in seawater. A semi-foamed polyethylene tape for use in the molding of foamed jacket polyethylene cables is disclosed. After tumble mixing low density foaming polyethylene, ethylene vinyl acetate co-polymer and polyethylene color concentrate, the tape is extruded on a thermoplastic extruder having a maddox-mixing screw that effectively mixes polyethylene compounds and a slot die with a suitable opening dimension. The tape is then quenched. By controlling manufacturing variables the tape is foamed to 40 to 50 of its maximum. The tape is then foamed to 100 maximum during the manufacturing of a cable assembly. Keywords Patents, Electric cables, Electric connectors. aw
APPROVED FOR PUBLIC RELEASE