Cord Tyre Fabric and Breaker

A cotton cloth for motor tyres devised to eliminate the chafing action of threads crossing each other, as obtains in the " builder " fabric. The cloth is made with strong corded threads for the warp, with as little weft as possible. The picks vary from 4 to 10 per inch. The warp threads are laid parallel and vary from 22 to 25 per inch. The weft is a single end of 21's to 23's with 10 to 16 turns per inch and is only intended to retain the warp threads in parallel order. The warp takes all the strain, and is composed of two-ply threads, counts 23's, 5 X 3 ends twisted right, left, right. The single yarn is 16 to 20 turns, first doubling 5 ends up, 16 to 20 turns, and the finishing twisting 15 ends (5 X 3) is also 16 to 20 turns per inch. These are the " cord tyres " of commerce (see Builder Fabric and Breaker)

The breaker fabric is applied to the motor tyre just beneath the tread and its purpose is to protect the building fabric and to distribute the shock the tyre necessarily receives on the road. It is more embedded in the rubber matrix than the others. The fabric is of a lower texture, giving more and larger interstices through which the rubber may pass, thus permitting the consolidation of the two rubber layers (the inner and outer surfaces) forming practically a solid rubber body where the greatest frictional wear is to be encountered. The average breaker fabric is similar in construction to the builder fabric in respect to yams employed. Usually about 10 to 11-oz. per square yard, mock leno weave, 16's-6-ends, 5/6 turns warp; 18's-18-ends, 4/5 turns weft; 28-ends X 7 picks per inch (see Breaker and Cord Tyre Fabric)

This is the cotton cloth on which the motor tyre maker places the greatest reliance for the wearing qualities of the finished tyre. There are two main varieties, the square woven or " builder fabric," in which the warp and weft threads are practically equal, and the " cord " fabric, which is also square woven, but wherein the warp only is relied on for the strength or any other stress-resisting qualities that may be required. The builder fabric is tightly woven, giving it a stiff, hard feel, and is a superfine " duck." The standard fabric is 17¹/₄ oz. per square yard, composed for 22's or 23's warp and weft yarns, 11-fold single ply, the twist in the single 14 to 15 turns, and in the ply yarn 4 to 5 turns per inch; 23 X 23-ends and picks per inch. These are the " fabric tyres of commerce " (see Cord Tyre Fabric and Breaker)