| 摘要 |
PROBLEM TO BE SOLVED: To provide a board for a water gate, sluiceway, sluice pipe, and water cut-off door, with a less variation in rigidity in a surface direction and excellent in maintainability.SOLUTION: A board for a water cut-off door is made of a reinforced fiber and a thermoplastic resin. When the flexural elastic moduli of a piece a cut out in an installation vertical direction of the board for the water cut-off door, a piece b cut out to be inclined at 15° on the basis of the piece a, a piece c cut out to be inclined at 30°, a piece d cut out to be inclined at 45°, a piece e cut out to be inclined at 60°, a piece f cut out to be inclined at 75°, and a piece g cut out to be inclined at 90° are respectively A, B, C, D, E, F, and G, the board for a water cut-off door satisfies the following formula with respect to all of A to G: ((A+B+C+D+E+F+G)/7)×0.8<A to G<((A+B+C+D+E+F+G)/7)×1.2. |
