Introduction:
Non-Woven Geotextile are needle punched fabrics made from polypropylene. The dry laid needle punch technology is based on a two step process. Firstly, polypropylene resin is extruded into fibres. Secondly, the fibres are carded and needlepunched. Finally, some types are added thermal treatment. Weights range from 100 g/m2 up to 1200 g/m2.

Functions of Non-Woven Geotextile:

Primary Functions:

Separation

The durability and mechanical properties of Non-Woven Geotextiles make them ideal as separating layers in construction works.

• To prevent mixing of construction layers.
• To improve the compaction properties of the aggregate layer.
• To increase bearing capacity by avoiding material loss into the subgrade.
• To provide long-term stability of foundation layers.

Filtration

The characteristic opening size of Non-Woven Geotextiles is designed to retain particles while allowing free movement of water, making it possible to separate two layers during intense hydraulic activity.

• To avoid migration of fine material into coarse material as a result of water flow in the soil.
• To maintain the water flow in the soil with minimum pressure loss.
• To prevent migration of fine material as a result of pump effects from dynamic loads such as traffic.

Protection

When placing a Non-Woven Geotextile on both sides of a waterproof membrane, the thickness and strength of the geotextile protect the membrane from puncture.

• To ensure the integrity of a sealing material when fill material and/or loads are applied.
• To protect a membrane and at the same time, drain water in its plane.

Secondary Function:

Drainage

Excess water is drained off the construction - not by passing through the Non-Woven Geotextile as when used for filtration - but by flowing in the plane of the geotextile leading it away from the construction.

• To ensure that water and/or other fluids are drained with minimum pressure loss.
• To ensure an ongoing drainage.

Introduction:
Non-Woven Geotextile are needle punched fabrics made from polypropylene. The dry laid needle punch technology is based on a two step process. Firstly, polypropylene resin is extruded into fibres. Secondly, the fibres are carded and needlepunched. Finally, some types are added thermal treatment. Weights range from 100 g/m2 up to 1200 g/m2.

Functions of Non-Woven Geotextile:

Primary Functions:

Separation

The durability and mechanical properties of Non-Woven Geotextiles make them ideal as separating layers in construction works.

• To prevent mixing of construction layers.
• To improve the compaction properties of the aggregate layer.
• To increase bearing capacity by avoiding material loss into the subgrade.
• To provide long-term stability of foundation layers.

Filtration

The characteristic opening size of Non-Woven Geotextiles is designed to retain particles while allowing free movement of water, making it possible to separate two layers during intense hydraulic activity.

• To avoid migration of fine material into coarse material as a result of water flow in the soil.
• To maintain the water flow in the soil with minimum pressure loss.
• To prevent migration of fine material as a result of pump effects from dynamic loads such as traffic.

Protection

When placing a Non-Woven Geotextile on both sides of a waterproof membrane, the thickness and strength of the geotextile protect the membrane from puncture.

• To ensure the integrity of a sealing material when fill material and/or loads are applied.
• To protect a membrane and at the same time, drain water in its plane.

Secondary Function:

Drainage

Excess water is drained off the construction - not by passing through the Non-Woven Geotextile as when used for filtration - but by flowing in the plane of the geotextile leading it away from the construction.

• To ensure that water and/or other fluids are drained with minimum pressure loss.
• To ensure an ongoing drainage.