| 摘要 |
PURPOSE:To provide a filter sheet, which is suitably used as a water pollution preventing film, through simple constitution, by a method wherein a woven part, where wefts and warps are woven, and a non-woven crossing part, where wefts and warps are not woven, are longitudinally and laterally alternately woven. CONSTITUTION:A filter sheet 10 for engineering work consists of woven-part 13, where warps 11 and wefts 12 are mutually woven, and a non-woven crossing part 14 where the warps 11 and the wefts 12 are entirely or partially not woven. In case the sheet 10 is used as a water pollution preventing cloth, water freely passes through the non-woven crossing part 14, and this enables water to be escaped through the latticed fabric part of the non-woven crossing part 14 even if the force of waves is exerted on the preventing cloth. Floating earth and sand in a preventing cloth 20 are prevented from flowing to the outside by virture of the warps 11 and the wefts 12 of the non-woven crossing part 14. |
