Elastic woven or knitted fabric, and cushioning material and seat using the same

摘要

The present invention relates to an elastic woven or knitted fabric that has an elastic yarn comprising an organic synthetic macromolecule disposed in at least part thereof, and has the following physical properties: (1) a stress at 10% elongation in a range of 100 to 600N per 5cm width in at least one of a warp direction and a weft direction, and an elongation recovery factor at 15% elongation of at least 75% in the same direction; (2) a ratio ST1/ST2 of not more than 5, wherein ST1 is the stress at 10% elongation in one of the warp and weft directions, and ST2 is the stress at 10% elongation in the other one of the warp and weft directions, with the proviso that ST1≥ST2; and (3) a dry heat shrinkage factor at 180 DEG C in a range of 1.0% to 15% in each of the warp direction and the weft direction.