PP PET Nonwoven Needle Punched Short Fiber Polypropylene Non Woven Geotextile For Road Covering
Comparative analysis of nonwovens and other materials:
1. Comparison with non-woven geotextiles
Woven geotextiles (woven fabrics)
· Raw materials and process: Made of synthetic fiber filaments (such as polyester and polypropylene) through weaving process, with tight structure and orderly fiber arrangement.
Performance characteristics:
· Higher tensile strength (especially longitudinal strength), excellent wear resistance, suitable for high-load scenarios (such as roadbed reinforcement).
· Low permeability and porosity, weak filtration function, but stronger puncture resistance.
· Application scenarios: retaining walls, steep slope reinforcement and other projects requiring high-strength support.
2. Plastic flat wire woven geotextile
· Raw materials and process: woven with polypropylene (PP) or polyethylene (PE) flat wire, with lower cost.
· Performance characteristics:
· Light weight and good integrity, but high elongation, easily deformed by temperature.
· Strong acid and alkali resistance, suitable for temporary isolation or low-cost anti-seepage projects.
Comparison with other functional materials
1. Traditional textiles (cotton/linen fabrics)
Physical properties: Traditional fabrics have good moisture absorption but are easy to degrade; non-woven fabrics are corrosion-resistant and anti-aging (such as polypropylene fibers are acid and alkali resistant).
Functionality: Non-woven fabrics can form a three-dimensional pore structure through a needle punching process, achieving dual functions of water permeability and filtration, which is better than the single isolation of cotton and linen.
2. Plastic impermeable membranes (such as HDPE membranes)
Water permeability: Plastic membranes are completely impermeable and need to be used with non-woven fabrics to enhance puncture resistance and drainage capabilities.
Durability: Non-woven fabrics have weak resistance to ultraviolet aging, and anti-aging agents such as TiO₂ need to be added to improve performance.
3. Fiberglass geotextiles
Strength and temperature resistance: Glass fiber has higher strength and high temperature resistance (basalt fiber can reach more than 1000℃), but poor flexibility and difficult construction.
Cost: The production cost of non-woven fabrics is 30%-50% lower, suitable for large-scale applications.
GEOTEXTILE INST ALLATION
To pave by roll with artifical method, the fabric must be level and appropriately leave the margins for
deformation. The inst lation method usually has overlapping, sewing and welding.
The overlapping part is generally more than 0.2m.
It should be welded or stitched for the exposed geotextiles.
AII sewing must be continuously carried out(for example, point-sewing is not allowed),
the geotextiles must be overlapped more than 200mm before overlapping.
The minimum distance between sewing needle and the fabric edge(the edge of exposed material) is at least 25mm.
| Unit weight
(g/sqm) | Thickness
(mm) | Breaking strength
(kn/m) | CBR burst strength(KN) | Elongation at break(%) | Tear Strength
(KN) |
| 100 | 0.9 | 2.5 | 0.3 | 25-100 | 0.08 |
| 150 | 1.3 | 4.5 | 0.6 | 25-100 | 0.12 |
| 200 | 1.7 | 6.5 | 0.9 | 25-100 | 0.16 |
| 250 | 2.1 | 8.0 | 1.2 | 25-100 | 0.20 |
| 300 | 2.4 | 9.5 | 1.5 | 25-100 | 0.24 |
| 350 | 2.7 | 11.0 | 1.8 | 25-100 | 0.28 |
| 400 | 3.0 | 12.5 | 2.1 | 25-100 | 0.33 |
| 450 | 3.3 | 14.0 | 2.4 | 25-100 | 0.38 |
| 500 | 3.6 | 16.0 | 2.7 | 25-100 | 0.42 |
| 600 | 4.1 | 19.0 | 3.2 | 25-100 | 0.46 |
| 800 | 5.0 | 25.0 | 4.0 | 25-100 | 0.60 |
