IRRIGATION TUBE

To provide an irrigation tube which secures watering in the vicinity of an irrigation tube in an irrigation region, comprises uniform water amount and uniform change of a pressure of supplied water, and comprises uniform irrigation property in a longitudinal direction.SOLUTION: There is provided an irrigation tube which is a flat shape in non-water conduction time, which becomes a round shape when water is conducted to inside, and which is formed of a thermoplastic resin composition, the irrigation tube comprises: many small holes which are formed of a repeated arrangement pattern with a prescribed length in a longitudinal direction, on only one surface thereof. If a direction vertical to a center line which equally divides one surface of the irrigation tube into two parts along the longitudinal direction is an X-axis, and a position of each small hole in the X-axis direction is expressed so that an end part is 0% and a center part is 100% for a length from a center of the X-axis to the end part of the one surface, there are small holes of 16-70% with respect to a total number of small holes in the arrangement pattern on positions of 95-99%, and there are small holes of 15-30% with respect to a total number of small holes in the arrangement pattern on positions of 60-75%.SELECTED DRAWING: None 【課題】灌水領域における灌水チューブ近傍の散水を確保しつつ、水量の均一性が高く、供給する水の水圧の変化に対してその均一性を保持し、且つ、長手方向に均一灌水性を有する灌水チューブを提供する。【解決手段】非通水時には扁平であり、内部に通水されると丸みを帯びる形状となる、熱可塑性樹脂組成物からなる灌水チューブであって、その片面にのみ多数の長手方向に所定の長さの繰り返しの配列パターンで形成された小孔を有し、前記灌水チューブの片面を長手方向に沿って２分する中心線に対して垂直な方向をＸ軸とし、Ｘ軸方向における各小孔の位置を、Ｘ軸の中心から前記片面の端部までの長さについて、端部を０％、中心部を１００％として表すとき、９５〜９９％の位置に前記配列パターン中の小孔の総数に対して１６〜７０％の小孔が存在し、且つ、６０〜７５％の位置に前記配列パターン中の小孔の総数に対して１５〜３０％の小孔が存在する。【選択図】なし