Types and Raw Material of Geotextiles

When we talk about geotextile and its essential aspects we refer to a type of flat, permeable textile material, of appreciable deformability, formed by thermoplastic polymer fibers, which is used for geotechnical applications.

The true value of the weight of geotextiles is in their raw material and in their manufacturing mode. The polymers used in the manufacture of geotextiles are usually of synthetic origin due to their greater durability compared to natural ones.

The weight of the geotextile (grammage) does not offer relevant technical information about geotextile, if it would the resistances: CBR, traction, elongation, puncture, etc. In addition to the way geotextiles are manufactured, an important factor is the raw material used to do so.

Types and Raw Material of Geotextiles

RAW MATERIALS:


The multimeter used in the manufacture of Geotextil fibers is made of the following materials: POLYPROPYLENE, POLYETHYLENE and POLYESTER.

Polypropylene is a long chain thermoplastic polymer with high rigidity, good tensile properties, acid resistance and durability.
Polyethylene is a simple organic polymer with excellent flexibility, ease of handling and good physical properties. They are practically not used today.
Polyesters are a group of polymers. They are characterized by being slightly deformable and having a high elastic modulus. They are likely to be degraded in alkaline environments, gypsum grounds, near cement / concrete.

FABRICATION PROCESS:

To manufacture geotextiles it is necessary to follow a complex process of transformation from pellets (raw material) to the final geotextile. Depending on the application we are looking for, we can find geotextiles for: Reinforcement, protection, drainage, filtration and separation.

Geotextiles can be classified as follows, depending on their manufacturing system:

Sharp nonwoven geotextile with fiber continuity: 100% virgin polypropylene filaments with subsequent thermofusion to give fiber continuity.

Heat-welded non-woven geotextile: It has the same mass in smaller volume, less permeability and greater rigidity, it is split before deforming.

Sharp nonwoven short fiber woven geotextile: Much lower mechanical strength under the same weight.

Woven Geotextile: It has less permeability and low point load opens fibers.

Quality Control of Geotextile:


A quality control comes into play in the geotextile manufacturing process. GTM Geotextile has its own approved laboratory to carry out the necessary tests so that its products offer the highest quality levels.

In the GTM Geotextile laboratory, we thoroughly analyze both finished products and raw materials for their elaboration and subsequent use, taking care of every detail to offer the best product.

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