Reinforced Polypropylene (RPP) and Reinforced Polyethylene (RPE) Liner Design and Installation

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Review of polypropylene and polyethylene geomembranes Intertape Arthurs

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Reinforced Polypropylene (RPP) and Reinforced Polyethylene (RPE) Liner Design and Installation

  1. 1. Reinforced Polypropylene (RPP) and Reinforced Polyethylene (RPE) Liner Design and Installation Trevor Arthurs Director of R&D ECP Division of Intertape Polymer
  2. 2. Topics <ul><li>Overview of Polypropylene (PP) and Polyethylene (PE) </li></ul><ul><li>Manufacturing Process </li></ul><ul><li>Slit Tape Polyethylene Liners and Applications </li></ul><ul><li>RPP Liners and Applications </li></ul><ul><li>RPE Liners and Applications </li></ul><ul><li>Welding Methods </li></ul>
  3. 3. Overview of Polypropylene and Polyethylene <ul><li>Terpolymer Polypropylene (Basell) </li></ul><ul><li>PP used in RPP coatings </li></ul><ul><li>PP is normally a very stiff polymer </li></ul><ul><li>Geomembrane grades produced by adding ethylene and butene to standard PP in the reaction process </li></ul><ul><li>Low Stiffness </li></ul><ul><li>0.88 Density </li></ul><ul><li>Good General Chemical Resistance </li></ul><ul><li>Poor Hydrocarbon Chemical Resistance </li></ul><ul><li>Good Abrasion Resistance </li></ul>
  4. 4. Overview of Polyethylene and Polypropylene <ul><li>Polyethylene – HDPE </li></ul><ul><li>(High Density PE) </li></ul><ul><li>Melting point of 136ºC </li></ul><ul><li>0.960 Density </li></ul><ul><li>High Stiffness </li></ul><ul><li>Excellent General Chemical Resistance </li></ul><ul><li>Excellent Hydrocarbon Chemical Resistance </li></ul><ul><li>Excellent Abrasion Resistance </li></ul><ul><li>Polyethylene – LLDPE </li></ul><ul><li>(Linear Low Density PE) </li></ul><ul><li>Melting point of 120ºC </li></ul><ul><li>~0.91 – 0.94 Density </li></ul><ul><li>Low Stiffness </li></ul><ul><li>Good General Chemical Resistance </li></ul><ul><li>Poor Hydrocarbon Chemical Resistance </li></ul><ul><li>Excellent Abrasion Resistance </li></ul>
  5. 5. Reinforced PE and PP Liner Manufacturing Process
  6. 6. Reinforced Geomembrane General Structure Copyright, 1999, Intertape Polymer Group
  7. 7. Tape Based Scrim Structure
  8. 8. Slit Tape Polyethylene Liners and Applications
  9. 9. Slit Tape Reinforced Geomembranes <ul><li>Reinforced with black woven tapes </li></ul><ul><li>Offered in 10, 11, 12, 16, 20 and 24 mil thicknesses </li></ul><ul><li>Warranty varies with thickness and whether or not the liner is covered </li></ul><ul><li>Used for clear water containment such as ponds and irrigation canals or as short term oil pit / soil remediation liners </li></ul>
  10. 10. Reinforced Geomembrane General Structure Copyright, 1999, Intertape Polymer Group
  11. 11. 2001 Project Before Re-build
  12. 12. Reshaping of Canal
  13. 13. Pulling out 12 mil Liner Panel
  14. 14. Covering The Liner
  15. 15. Finished Canal
  16. 16. 2001 Project in 2003
  17. 17. RPP Liners and Applications
  18. 18. RPP Liners <ul><li>Reinforced with knit Polyester scrim </li></ul><ul><li>Available in 24, 30, 36, 45 and 60 mils </li></ul><ul><li>Typically have a 15 year warranty </li></ul><ul><li>Do not need to be covered </li></ul><ul><li>Used in pond and irrigation lining </li></ul><ul><li>36 mil used in Ag waste ponds </li></ul>
  19. 19. Irrigation Ditch – RPP24
  20. 20. Irrigation Ditch – RPP24
  21. 21. Murder Rock Golf & CC – RPP24
  22. 22. Dairy Runoff Containment Pond – RPP24
  23. 23. Dairy Runoff Containment Pond – RPP24
  24. 24. CAFO – Waste Lagoon – RPP36
  25. 25. CAFO – Waste Lagoon – RPP36
  26. 26. CAFO – Waste Lagoon – RPP36
  27. 27. RPE Liners and Applications
  28. 28. RPE Liners <ul><li>New product in the marketplace, replaces RPP products </li></ul><ul><li>Reinforced with Knit Polyester scrim </li></ul><ul><li>Available in 24, 30 and 36 mils </li></ul><ul><li>15 year warranty </li></ul><ul><li>Used in pond and irrigation lining </li></ul><ul><li>36 mil used in Ag waste ponds </li></ul><ul><li>Being tested in floating cover applications </li></ul>
  29. 29. RPE Liners <ul><li>Advantages of RPE vs RPP </li></ul><ul><ul><li>5x better abrasion resistance </li></ul></ul><ul><ul><li>50% higher seam peel strength </li></ul></ul><ul><ul><li>More than 50% improvement in tongue and trap tear </li></ul></ul>
  30. 30. RPE Liners – Irrigation Canal Lining Installed Over Cracked Concrete
  31. 31. Welding Methods <ul><li>All polyethylene and polypropylene liners must be welded using heat </li></ul><ul><li>Panels cannot be joined using solvents, adhesives or radio frequency (RF) welding </li></ul><ul><li>Factory welding is used to produced panels of up to 0.5 acres in size – which reduces installation time and cost relative to other types of liners </li></ul>
  32. 32. Welding Methods <ul><li>Field welding performed using hot air or hot wedge welding </li></ul><ul><li>In the case of polyester scrim products all cut edges are sealed with an extrusion bead of molten polymer to prevent wicking </li></ul><ul><li>Repairs to the liners are performed by heat welding material over the problem area </li></ul>
  33. 33. Wedge Welder
  34. 34. Wedge Welder
  35. 35. Hot Air Welder
  36. 36. Floor Crawling Hot Air Welder
  37. 37. Thank You Are there any questions?

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