Cord structure

DETAILED DESCRIPTION I claim: 1.
A tire cord comprising (1) a core consisting of at least one drawn, oriented yarn composed of continuous filaments of a synthetic polymer, wherein said drawn, oriented yarn(s) each contains less than four turns of twist per inch of yarn length and (2) a wrapper yarn wound helically around said core forming spaced-apart helices along the length thereof.
2.
The cord of claim 1 wherein each yarn of said core contains from 0 to about 1 turn of twist per inch of yarn length.
3.
The cord of claim 1 wherein each yarn of said core is tangled.
4.
The cord of claim 1 wherein said synthetic polymer is nylon.
5.
The cord of claim 4 wherein said continuous filaments each has a nominal denier of 6.
6.
The cord of claim 4 wherein the total denier of the core is in the range of about 1680 to 7560.
7.
The cord of claim 4 wherein said wrapper yarn forms from 1 to 8 helices per inch of core length.
8.
The cord of claim 7 wherein said wrapper yarn is composed of nylon.
9.
The cord of claim 8 wherein said core consists of a plurality of said drawn, oriented yarns laid side-by-side each having a denier ranging from 500 to 2500.
10.
The cord of claim 9 wherein said nylon is nylon 66.
11.
The cord of claim 10 wherein said wrapper yarn is a continuous filament nylon 66 yarn.
12.
The cord of claim 11 wherein said wrapper yarn has a nominal denier ranging from 20 to 1260 and a nominal denier per filament of 6.
13.
The cord of claim 4 wherein said core consists of a single yarn.
14.
The cord of claim 13 wherein said single yarn contains less than about 1.
0 turn of twist per inch of yarn length.
15.
The cord of claim 13 wherein said singles yarn is tangled.




Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention This invention relates to a polymeric cord structure for use in the reinforcement of articles such as pneumatic tires, hoses, belts, and other elastomeric articles.
The cord has a core consisting of a single yarn or a plurality of continuous filament yarns laid side-by-side and a wrapper yarn wound helically around the core yarns