Tire cord fabric and pneumatic tire

摘要

A cord fabric is structured by weaving a weft yarn into a large number of warp yarn (2) disposed in parallel so that the weft yarn crosses the warp yarn at a coarse density. In the cord fabric, the warp yarn is a composite cord constituted of at least one aramid first twist yarn and one aliphatic polyamide first twist yarn, and the weft yarn is a spun yarn of meta system aramid fiber. The cord fabric is used as a strip material of a belt cover layer which is wound in a spiral pattern around an outer circumference of a belt layer of a pneumatic tire in a radial direction.

主权项

1. A tire cord fabric comprising:
a plurality of warp yarns disposed in parallel; and a weft yarn weaved so as to cross the warp yarns in a coarse density; the warp yarn including at least one aramid first twist yarn having a first twist added to an aramid fiber bundle, and one aliphatic polyamide first twist yarn having a first twist in the same direction as the aramid first twist yarn added to an aliphatic polyamide fiber bundle; the aramid first twist yarn and the aliphatic polyamide first twist yarn being bundled and second twisted in the direction opposite the first twist; the weft yarn being a spun yarn of meta-aramid fiber; the weft yarn being weaved so that the tire cord fabric is plain woven; a total fiber fineness D1 of the warp yarn being 2770 to 5220 dtex and a fiber fineness D2 of the weft yarn being 150 to 300 dtex; and a ratio D1/D2 between the total fiber fineness D1 of the warp yarn and the fiber fineness D2 of the weft yarn being 17 to 25.