About Oekotech Textiles

• Oekotech textiles segment of technical textiles is dedicated in Ecological Engineering.
• The primary segment in this is Landfill waste management.
• This refers to the use of Geosynthetic goods to safe landfills against leakage of metropolitan or harmful waste.
• Other areas include secondary protection in Chemical/Oil Industries (ground covers and the like around process tanks for secondary containment should the tanks leak).
• A modern engineering landfill has the following components –
  1. A basal lining system to prevent the contamination of soil, and ground water by pollutants,
  2. A capping system to seal the waste when the capacity of the landfill is exhausted,
  3. An impervious sealing layer which prevents the entry of pollutants in the ground,
  4. A leach ate collection system for the collection and transmission of lactates to a collection pit,
  5. A secondary leach ate collection/leak detection system.

Introduction of the product / application areas

• Oekotech textiles application segment includes concepts in,
  1. Environmental protection(land fill waste management systems),
  2. Waste disposal and
  3. Recycling (recycling of polymer).
• The most well known concept is the use of geosynthetic products in Landfill management.
• Geosynthetics are widely used in the design of together base and cover liner systems of landfill amenities.
• The products include:
  1. Geogrids, which can be used to reinforce slopes beneath the waste, reinforce walls as well as to reinforce cover soils above geomembranes.
  2. Geonets, which can be used for in-plane drainage.
  3. Geomembranes, which are relatively impermeable, sheets of polymeric formulations that can be used as a barrier to liquids, gases and/or vapors; provide the critical functions of leach ate containment, protection of ground water and Landfill Gas (LFG). They are also used in landfill caps.
  4. Geocomposites, which consist of two or more geosynthetics, can be used for separation, filtration or drainage.
  5. Geosynthetic clay liners (GCLs), which are composite materials consisting of Bentonite and geosynthetics that can be used as an infiltration/hydraulic barrier; they find application not only in landfills/waste management but also for mine rehabilitation, tunnels, secondary containment e.g. of petrochemicals, landscaping etc.
  6. Geotextiles, which can be used for filtration purpose or as cushion to protect the geomembrane from puncture.

• Both woven and non-woven geosynthetics are used.
• Geosynthetic clay liners consist of non-woven fabric layers of 180-250 GSM with an intermediate layer of Bentonite mineral (Unit Mass: 1-5 kg/sq m).
• Geotextiles used for filtration/cushion are typically high GSM (285 – 3000) non-woven fabrics.
• The ingredients for making HDPE geomembranes are around 97% high molecular weight polyethylene, 2 to 3% carbon black, and 0.5 to 1.0% stabilizers and antioxidants.
• Some most important characteristics of HDPE geomembrane are that they are
  1. Chemical resistance,
  2. Low permeability and
  3. Ultraviolet resistance.
• The thickness of this geomembrane is 2 mm.

Manufacturing process and Type of Raw materials

• GCLs are manufactured from quality polypropylene geotextiles and premium grade Sodium Bentonite powder.
• The upper and base layers of geotextiles can be of non-woven and woven fabric respectively.
• Normally, Bentonite clay is placed on a woven Geotextile, with the non-woven cover then being placed.
• The main procedures to make the fibre reinforced composite are made by the needle punching machine. And it is done across the entire surface area of the product. After that the product is thermally-locked to make sure it bears high long-term shear strength.