| 摘要 |
A pressure control drip tape is provided to enable the control of drain pressure, supply water throughout the drip tape uniformly, and reduce the production cost. An opening of drain holes is minimized by duplicate sheets capable of expanding by water pressure, thereby taking a decompression effect. A drip tape(T1) comprises: an exterior covering(10); duplicate sheets(21,23,25) which can be expanded by water pressure and are arranged in the shape of two layers or more; a main passage which is surrounded by the exterior covering(10) and the most inner duplicate sheet(21), and through which water supplied from a source of water supply flows for the most part; decompression passages(31,33) which are formed between the duplicate sheets(21,23,25); and plural drain holes(21H,23H,25H) which are formed at the boundary of the main passage and the decompression passages(31,33), thereby dripping water outside through the decompression passages(31,33) from the main passage. |
