| 摘要 |
<p>A composite sheet comprises a fabric (44) that is at least partially embedded in a polymeric sheet (46), with the fabric including warp yarns (48) extending in a longitudinal direction and weft yarns (50) extending in a lateral direction that is at least perpendicular to the longitudinal direction. A composite sheet comprises a fabric that is at least partially embedded in a polymeric sheet, with the fabric including warp yarns extending in a longitudinal direction and weft yarns extending in a lateral direction that is at least perpendicular to the longitudinal direction. The polymeric sheet includes longitudinally extending edges that are laterally spaced apart from one another; outer, longitudinally extending, two surfaces that extend laterally between, and are contiguous with, the edges; and a thickness defined in between, and perpendicular to the two surfaces. All of the warp and weft yarns of the composite sheet are between the two surfaces, and are not exposed at either of the two surfaces. Longitudinally extending two areas of the polymeric sheet are arranged in an alternating laterally extending series such that each of the first areas is contiguous with at least one of the second areas. For each of the first areas, weft yarns extend laterally through the first area, and warp yarns extend longitudinally through the first area. For each of the second areas, none of the ward yarns of the composite sheet are in the second area; weft yarns extend laterally through the second area, the second area having a laterally extending width and including all of the thickness of the polymeric sheet that is within the width; and the width of the second area is at least 0.3 inch. An independent claim is also included for a method for providing a composite sheet, which functions when exposed to fluid, comprising processing a polymeric sheet, including at least partially embedding yarns in the polymeric sheet, so that the polymeric sheet is reinforced by at least some of the yarns, and at least portions of the yarn(s) and a portion of the polymeric sheet are melted to one another at least at a region, which is or becomes an edge of the polymeric sheet, so that the edge is impermeable to the fluid.</p> |
