... ,highway,water conservancy,dam,tunnel,subway.The major functions of Non-woven Geotextile: Separation, filtration, drainage, reinforcement, protection, and liquid barrier ... natural ultra-violet light.Technical parameters (GB/T 17638-1998) of Staple Fiber Needle-Punched Non-Woven Geotextile SHD 6mx100m/roll, 250g ...