Spec InterpretationUS 180NW
Nonwoven Geotextile
US 180NW is a nonwoven needlepunched geotextile made of 100% polypropylene staple filaments. US 180NW resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids. Polypropylene is stable within a pH range of 2 to 13. US 180NW meets the following M.A.R.V. values except where noted:
| PROPERTY | TEST METHOD | ENGLISH | METRIC |
|---|---|---|---|
| Weight - Typical | ASTM D-5261 | 7.0 oz/sy | 237 g/sm |
| Tensile Strength | ASTM D-4632 | 180 lbs | 800 N |
| Elongation @ Break | ASTM D-4632 | 50% | 50% |
| Mullen Burst* | ASTM D-3786* | 330 psi | 2,275 kPa |
| Puncture Strength* | ASTM D-4833* | 105 lbs | 467 N |
| CBR Puncture | ASTM D-6241 | 475 lbs | 2,114 N |
| Trapezoidal Tear | ASTM D-4533 | 75 lbs | 333 N |
| Apparent Opening Size | ASTM D-4751 | 70 US Sieve | 0.212 mm |
| Permittivity | ASTM D-4491 | 1.40 Sec-1 | 1.40 Sec-1 |
| Water Flow Rate | ASTM D-4491 | 100 g/min/sf | 4,074 l/min/sm |
| UV Resistance @ 500 Hours | ASTM D-4355 | 70% | 70% |
| ROLL SIZE | AREA | WEIGHT |
|---|---|---|
| 12.5' x 360' | 500 sys | 240 lbs |
| 15' x 300' | 500 sys | 240 lbs |
* Historical averages (current values not available): Mullen Burst Strength ASTM D3786 is no longer recognized by ASTM D-35 on Geosynthetics as an acceptable test method. Puncture Strength ASTM D4833 is not recognized by AASHTO M288 and has been replaced with CBR Puncture ASTM D6241.