| 摘要 |
PROBLEM TO BE SOLVED: To provide an impervious sheet, hardly sliding even when wetted with rainwater, and hardly reducing working efficiency even when executing work by laying on an inclined plane.SOLUTION: An impervious sheet (10) of the present invention is an impervious sheet installed on the ground surface, and in the impervious sheet, a resin layer is formed on both surfaces of a textile, and the textile is constituted of the warp composed of spinning yarn of including synthetic fiber as a main component and the weft composed of spinning yarn of including synthetic fiber as a main component, and a surface of the resin layer is irregular. Surface irregularity is desirable to be two pieces or more per the area 10 mmin the number of a projection part. The surface irregularity is desirable to be 1.1-1.9 in the ratio of a maximum value and a minimum value of a thickness (a thickness maximum value/a thickness minimum value) per the area 1 mm. A coefficient of kinetic friction of the impervious sheet is desirable to be 0.40 or more. Fluff of the spinning yarn is desirably exposed to a surface of the resin layer. |
