Method producing a color coded, cellular thermoplastic resin coated wire and the materials necessary for the coating
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United States of America Patent
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-
Nov 24, 1981
Issued Date -
N/A
app pub date -
Apr 30, 1980
filing date -
Apr 24, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A particulate concentrate, for example pellets, is provided comprising predetermined amounts of a pigment and a blowing or foaming agent in a polymer matrix. The concentrate can be added to an extruder together with a polymer insulating material for the formation of color-coded cellular insulation on a conductor wire of a cable, for example a communication cable. The composition of the concentrate is so determined that different color-coded, cellular, insulating coatings can be produced which are dielectrically matched, as required.
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