Wrekin Products traditional and innovative solutions
   

Our E'GRID products are manufactured by punching then stretching sheets of high grade polymers under closely controlled conditions. A polymer has molecular chains distributed randomly with similar properties in all directions, by punching and then stretching the polymer its mechanical properties are greatly increased in the direction of orientation. 

The production process is continuously tested and reviewed to maintain a high quality standard. The control of orientation in the nodes has a significant effect on the tensile properties and creep performance of the grid; it is also this orientation that provides long term stability. We ensure the optimization of the nodes, ribs and bars is maintained during production, it is these features that enable our geogrids to maintain the spreading of load in the soil structure. Our Quality Assurance is based on our continual testing and control over these key production processes.

Tensile Testing
Tensile testing in accordance with EN ISO 10319 is an essential part of factory QC System.

Creep Performance
A good creep performance under sustained loading is essential for the successful use of geogrids in critical structures such as walls abutments and steep embankments. We are one of the few geotechnical product manufacturers in the world with the necessary creep testing facility to ensure that its products meet the stringent requirements of international standards and that make this data available to design engineers. Results from tests carried out in the company's suite of temperature controlled laboratories are used to safely predict the product performance for design lifetimes of 120 years or more. By testing at ambient and elevated temperatures the creep behavior is accelerate.

Carbon Black Content and Dispersion
The exposure of un-protected polymer materials to UV Light including sunshine will cause photo-degradation and aging with a rapid loss of mechanical properties.  The UV resistance property of geogrids is greatly improved by the optimum content of finely divided carbon black. Insufficient carbon black content, large particle size or uneven dispersion significantly reduces the effect on UV resistance.  Regular testing according to international standards of carbon black content and dispersion ensures the consistency of UV resistance of E'GRID Products.