DETAILED DESCRIPTION OF THE INVENTION Although they are relatively new, electrically conductive polymers and their methods of manufacture are well known.
They are discussed in U.
S.
Pat.
No.
4,269,738, discussed above and also in U.
S.
Pat.
No.
4,394,304 issued July 19, 1983 to Wnek.
Also, "Review of the Synthesis of Polyacetylene and its Stabilization to Ambient Atmosphere" by Mahmoud Aldissi published in April of 1984 in Synthetic Metals, Volume 9, contains a detailed description of the polymerization reaction of acetylene and the formation of polyacetylene electrically conductive polymers.
Other methods of manufacture are disclosed in U.
S.
Pat.
Nos.
4,108,942, 4,093,790, 4,228,060, 4,222,903, 4,204,216 and 4,200,716.
Polyvinylidene chloride, ethylene vinyl alcohol copolymers, polyethylene terephthalate, polyformaldehyde and polyvinyl fluoride are well known as gas barrier materials for use in food packaging films.
Consequently, the methods of manufacture of these materials are well known.
For example, U.
S.
Pat.
No.
3,560,461 issued Feb.
2, 1971 to Yonezu, Nishoka and Mukumoto discloses a method for making ethylene vinyl alcohol copolymers by saponifying ethylene vinyl acetate copolymers.
In such ethylene vinyl alcohol copolymers, the oxygen permeability generally improves as the degree of saponification increases and it is preferred that the degree of saponification be greater than 96%.
The methods of manufacture of the polymers for the protective outer layer are also well known.
Low density polyethylene, for instance, is a polymer which has been manufactured for many years and its methods of manufacture are described in literally thousands of patents and articles.
The type of low density polyethylene which is preferred for use in the present invention is that type of low density polyethylene which is commonly used in wire and cable applications.
The composite of the present invention can be manufactured by a variety of methods, depending upon the desired form for the composite.
The different layers can be formed separately and laminated together
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