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Method of manufacture of electrical wire and cable having a reduced coefficient of friction and required pulling force

  • US 9,352,371 B1
  • Filed: 02/13/2013
  • Issued: 05/31/2016
  • Est. Priority Date: 02/13/2012
  • Status: Active Grant
First Claim
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1. A process for making a finished wire and cable having a reduced coefficient of friction and reduced pulling force during installation, the process comprising:

  • providing a payoff reel containing at least one internal conductor wire;

    supplying the at least one internal conductor wire from the reel to at least one extruder;

    providing the at least one extruder, wherein the at least one extruder applies an insulating material and a polymerized jacket composition over the at least one internal conductor wire, wherein the jacket composition comprises;

    a predetermined amount by weight of nylon; and

    at least 3% and less than 5% by weight of a predetermined amount of amorphous silica, wherein the nylon and silica are polymerized together without a pulling lubricant as an extrudable, pelletized compound;

    providing a cooling device for lowering the temperature of the extruded insulating material and the polymerized jacket composition and cooling the insulating material and the polymerized jacket composition in the cooling device; and

    ,reeling onto a storage reel the finished, cooled, wire and cable for storage and distribution;

    wherein the extruded nylon and silica of the finished wire and cable reduces the coefficient of friction and reduces the pulling force during installation.

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