Method producing a color coded, cellular thermoplastic resin coa

Details Method producing a color coded, cellular thermoplastic resin coa Method producing a color coded, cellular thermoplastic resin coa

1980-04-30

1981-11-24

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

206 19, 206526, 264 54, 264142, 264174, 264211, 264DIG5, 521 79, 521 95, 521134, 521143, 521920, B29D 2700

Patent

active

043024106

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.

REFERENCES:
patent: 2610607 (1952-09-01), Isenberg
patent: 2674007 (1954-04-01), Allemann et al.
patent: 3015386 (1962-01-01), Vogt
patent: 3198328 (1965-08-01), Donahue et al.
patent: 3198859 (1965-08-01), Tomlinson
patent: 3294224 (1966-12-01), Horwitz
patent: 3404104 (1968-10-01), Hill et al.
patent: 3424300 (1969-01-01), Penniman
patent: 3645930 (1972-02-01), Normanton
Lasman, Henry R., "Foaming Agents for Polyolefins" In SPE Journal, Sep. 1962, pp. 1184-1193.
"The Condensed Chemical Dictionary", Eighth Edition, Revised by Gessner G. Hawley, New York, Van Nostrand Reinhold, .COPYRGT.1971, p. 705.

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