Showing posts with label Geomembrane. Show all posts
Showing posts with label Geomembrane. Show all posts

Announcement: LEISTER-New U.S. Headquarters and New Geo Tool

Leister Makes Firm Commitment to the US Geo Industry Swiss Manufacturer Announces New U.S. Headquarters and New Geo Tool

CHICAGO - October 17, 2011 - Leister Process Technologies, the worldwide leader in plastic welding and hot air equipment announces the opening of its expanded U.S. headquarters outside of Chicago. The new, centrally located facility quadruples Leister's capabilities in North America. Among the new services offered:

. Complete inventory of Geosynthetic tools for instant availability
. Complete spare parts inventory for overnight parts shipping
. Complete new service and repair facility
. Complete new training & demonstration space

"The expansion of Leister USA is paramount in our effort to better service the U.S. Market," stated Jerry Zybko, general manager, Leister USA. "This is the first step in our commitment to the U.S. Geo industry," reports Steve Hobbs, business development manager of Leister USA's Geosynthetics Division. "We're ramping up our customer service and support network to assure a positive experience from start to finish with Leister tools," explained Hobbs.

In addition, Leister continues to expand and refine its Geosynthetics tool offerings. The newest addition is the FUSION 3 extrusion welder with 5 mm rod feed, an inexpensive solution to medium output extrusion welding.

Stay tuned for additional news about Leister's exciting growth in the U.S. Geo market. For details, contact your Leister distributor toll-free: 855-Leister (855-534-7839); via email:; or visit their website:

About Leister Process Technologies

Leister Process Technologies ( has been the worldwide leader in plastic welding and hot air equipment for more than 60 years. The Swiss manufacturer's plastic welding products are used in roof-sealing systems, floor coverings, plastic sheeting, earthworks, hydraulic and tunnel engineering, process-equipment manufacturing and vehicle repair.

Leister, with headquarters in K├Ągiswil, Switzerland, and sales and service centers in more than 90 countries, is ISO 9001 certified. To guarantee maximum quality, Leister develops and produces all its products and accessories (more than 10,000 items) on its own state-of-the-art manufacturing premises.

About Leister USA

Leister USA (, located outside Chicago, is a business unit of Leister Process Technologies and is the primary U.S. sales and service support center for Leister's full line of products including process heat and plastic welding equipment, lasersystems and microsystems. Leister USA boasts a wide network of distribution partners across the United States and Canada.

Extra volume in waste containment

In the construction of waste containments there is an economic advantage of using geosynthetics products.
As seen in the first picture if you use traditional clay and gravel layers in the landfill you can have about 5000 m3 of volume.

But as seen in the second picture if geosynthetics materials are used in the waste disposal area a gain of extra volume will be about 300 m3 with an increase of about 6% in the same area.

Layers of a landfill

From bottom to top layers:

  • Waste
  • Leveling layer : Levels the top of the waste dump. Forms a foundation layer for the capping construction.
  • Gas conducting layer : Ensures controlled removal of the gas rising to the surface of the dump.
  • Impermeable seal : Stops the escape of gas and prevents the influx of (rain) water.
  • Drainage layer : Removes excess (rain) water.
  • Vegetation layer : Permits formation of an environmentally acceptable surface structure and protects the liner.

You may also like below posts:

-Capping system for waste areas

-Waste disposal area

Steel water storage silo / tank

Another usage of geosynthetics materials are in steel water reservoirs.
These are very practical and easy to use water storage systems.

They come with all the parts inside and you construct it on site.

Their heights are upto 4.64 meters and diameters vary from 1.85 to 30.95 meters.

Inside the steel construction there is a nonwoven geotextile liner to protect the waterproof tank liner. The tank liner can be made of PVC or other type of polymers depending on the usage.

Capping system for waste areas

Instead of using traditional (mineral) products if we use geosynthetics materials for the capping of waste disposal areas we may have extra storage. So, to use geosynthetics has economic advantages against the traditional products. Also it is more easy to use geosynthetics (geotextiles, geomembranes, geogrids, geocomposites, geomats).

On the picture above you can see a simple comparison of “traditional” mineral- and “geosynthetic” capping of landfills.

As seen the mineral seal and drainage section have much thickness than the geosynthetics drainage and geomembrane seals.

Geocomposite drainage materials are used both for gas and water drainage.

Waste disposal area

This pictures shows layers of a typical waste disposal area.

  • Clay base
  • Drain pipes
  • drainage layer
  • sump pump
  • membrane (geomembrane) liner
  • leachate collection
  • waste
  • levelling layer
  • filter layers
  • gas vent
  • seepage drain
  • membrane liners (top)
  • drainage layer (top)

Some detailled information about waste capping will be sent in next posts.


We can simply devide geosynthetics in below groups.

  • Woven fabrics
  • Geogrids
  • Nonwoven fabrics (Thermally, mechanically, chemically bonded)
  • Nets
  • three dimensional mats
  • HDPE , LDPE liners
3)Geosynthetics clay liners, (bentonite mats)


Geocomposites are made by using above product with each other. For example a drainage composite can be made by joining 2 filter fabrics (nonwovens) and a 3 dimensional mats in the middle.
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