A.Characteristics of Polyester Continuous filament needle-Punched Geotextile :
Characteristics of Polyester Continuous filament Non-woven needle-Punched Geotextile is a kind of geosynthetics used in geotechnical engineering and civil engineering, which is made of PET continuous filament, by paving the filament net and concretion method, thus produced the fabric. Its fiber is arrayed a three dimentional structure. Besides its fine mechanical characteristics , it has chemical stability like fine drainage capacity in both directions, good capacity of elongation and high biology tolerance,alkali tolerance, acidity tolerance,weather resistance etc.Meanwhile,it has wider pore size,devious hole distributing, good permeability and filtration.
B.Applications of Polyester Continuous filament needle-Punched Geotextile
*Filtration in water conservancy project and slope protection project;
Separation and anti-seepage in channel engineering;
*Separation,filtration and drainage funtion in projects of road, railway and airfield runway;
*Reinforcement and drainage in projects of earth slope and retaining wall.
Technical parameters (GB/T 17639-1998) of Polyester Continuous Filament Non-Woven Needle-Punched Geotextile
|
NO.
|
SERIES
|
100
|
150
|
200
|
250
|
300
|
350
|
400
|
450
|
500
|
600
|
800
|
Remark
|
|
1
|
Mass per square meter warp%
|
-6
|
-6
|
-6
|
-5
|
-5
|
-5
|
-5
|
-5
|
-4
|
-4
|
-4
|
|
|
2
|
Thickness，mm ≥
|
0.8
|
1.2
|
1.6
|
1.9
|
2.2
|
2.5
|
2.8
|
3.1
|
3.4
|
4.2
|
5.5
|
|
|
3
|
Width warp %
|
-0.5
|
|
|
4
|
Tensile Strength KN/M ≥
|
4.5
|
7.5
|
10.0
|
12.5
|
15.0
|
17.5
|
20.5
|
22.5
|
25.0
|
30.0
|
40.0
|
MD/CD
Average
|
|
5
|
Tensile elongation %
|
40-80
|
|
|
6
|
CBR puncture strength KN ≥
|
0.8
|
1.4
|
1.8
|
2.2
|
2.6
|
3.0
|
3.5
|
4.0
|
4.7
|
5.5
|
7.0
|
|
|
7
|
Equivalent opening size O90 ， mm
|
0.07~0.2
|
|
|
8
|
Vertical permeability cm/s
|
K×（10-1~10-3）
|
K=1.0~9.9
|
|
9
|
Tearing strength KN
|
0.14
|
0.21
|
0.28
|
0.35
|
0.42
|
0.49
|
0.56
|
0.63
|
0.70
|
0.82
|
1.10
|
MD/CD
Average
|
