Geomembranes

Borstar® LLDPE enables easy processing, excellent gauge variation and high-output rates in geomembrane applications

Geomembrane linersGrowing concerns over waste have helped open a new market for cast- and blown-film processors in many countries.

In order to prevent pollution of ground water supplies, for example, many landfill areas now rely on protection by geomembranes. These thick, flexible, high-quality films need to provide puncture protection, withstand pressure, and exhibit high chemical and UV resistance.

Borealis has developed a range of Borstar® LLDPE grades for use in producing geomembrane applications through blown or calendar stack film extrusion. Geomembranes are typically produced from PVC or HDPE, but very-low-density PE and polypropylene are also being processed for this purpose. A typical geomembrane is 1.5-3 mm. thick and extruded in widths of from 4-8 metres.  

Our Borstar LLDPE material grades deliver a range of benefits including:

  • easy processing
  • high output rates
  • mechanical properties
  • excellent gauge variation
  • smooth surface
  • down-gauging potential for thinner liners
  • excellent distribution of carbon black
  • consistent quality
  • flexible liners, no need for blending plus higher quality
  • broad sealing window
  • no wrinkles or “banana curves” after unwinding,
  • high mechanical strength
  • low failure rate

The main geomembrane applications are:

  • landfill liners
  • capping liners
  • mining liners
  • building & construction liners
  • pond/aquaculture liners
  • canal liners

Page updated:  28.07.2010