MANUFACTURE OF WATER SUPPLY AND DRAINING MATERIAL FOR CIVIL ENGINEERING WORKS

摘要

PURPOSE:To manufacture a durable water supply and draining material by a method in which a water-passing tube is set in the longitudinal direction between the two layers of a nonwoven web containing 20% or more a synthetic fiber of a specific melting point, and they are integrally combined by needle punching and hot-bonded by heating. CONSTITUTION:A nonwoven web 1 containing 20% or more a low-melting synthetic fiber of a melting point of 150-180 deg.C is rolled and continuously sent out onto endless conveyers 4 and 5 provided on the upper and lower parts of an endless conveyer 2. In the endless conveyer 2, a water-passing tube 3 is sent out from plural reels and set in the longitudinal direction between the two layers of the nonwoven webs 1. They are punched by a needle puncher with needle plates and hot-bonded in a heater 8 to form a nonwoven web laminate portion 7 to obtain a water supply and draining material 9. A low-cost and durable water supply and draining material 9 can thus be manufactured by a simple process.