US 640 is a woven monofilament filtration geotextile made of 100% polypropylene yarns. It is specifically designed for drainage and filtration applications. This product's has a Percent Open Area of 6% and resists clogging. US 640 meets the following M.A.R.V. values except where noted:
| PROPERTY |
TEST METHOD |
ENGLISH |
METRIC |
| Weight - Typical |
ASTM D-5261 |
6.0 oz/sy |
203 g/sm |
| Tensile Strength |
ASTM D-4632 |
370 x 250 lbs |
1647 x 1113 N |
| Elongation @ Break |
ASTM D-4632 |
15% |
15% |
| Mullen Burst |
ASTM D-3786 |
450 psi |
3,100 kPa |
| Puncture Strength |
ASTM D-4833 |
120 lbs |
534 N |
| Trapezoidal Tear |
ASTM D-4533 |
100 x 70 lbs |
445 x 312 N |
| Apparent Opening Size |
ASTM D-4751 |
40 US Sieve |
40 US Sieve |
| Permittivity |
ASTM D-4491 |
0.5 Sec-1 |
0.5 Sec-1 |
| Water Flow Rate |
ASTM D-4491 |
60 g/min/sf |
2460 l/min/sm |
| Percent Open Area |
CW-02215 |
6% |
6% |
| UV Resistance @ 500 Hours |
ASTM D-4491 |
90% |
90% |
| ROLL SIZE |
AREA |
WEIGHT |
| 6' x 300' |
200 sys |
89 lbs |
| 12' x 300' |
400 sys |
175 lbs |
Spec Interpretation
