| 摘要 |
A leather-like sheet which comprises: an ultrafine-long-fiber nonwoven fabric including an intertwined web structure composed of bundles of ultrafine long fibers; and a polymeric elastomer infiltrated in the fabric. It has the following features (1) to. (1) The bundles of ultrafine long fibers each comprises 5 to 70 ultrafine long fibers having an average single-fiber fineness of 0.5 dtex or less, (2) the bundles of ultrafine long fibers have an average fineness of 3 dtex or less, (3) the nonwoven fabric is constituted of superposed webs each composed of such bundles of ultrafine long fibers, the proportion by mass of the ultrafine long fibers to the polymeric elastomer is in the range of from 70/30 to 40/60, the polymeric elastomer is present in a substantially continuous state, and the ratio of the breaking tenacity in the lengthwise direction to that in the cross direction is from 1/1 to 1.3/1, the elongation at break in the lengthwise direction and that in the cross direction are 80% or higher each, and the ratio of the elongation at break in the lengthwise direction to that in the cross direction is from 1/1 to 1/1.5. This leather-like sheet gives a natural solid feeling similar to that of a natural leather and has a soft texture. It has a small difference in mechanical properties between the lengthwise direction and the cross direction. It has moderately reduced extensibility and long-lasting recovery. |
