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PPE (POLYPROPYLENE) Geomembranes

Polypropylene based geomembrane material offers outstanding performance in a variety of environmental containment applications. Polypropylene is a cost effective alternative to polyethylene for exposed or buried applications including reservoir, waste water or landfill liner, industrial or hazardous covers.

Polypropylene is a highly inert thermoplastic polymer. Polypropylene has very low levels of crystallinity when compared to polyethylene. This lower crystallinity eliminates most of the problems that are attributed to polyethylene such as ESCR, low large scale multi-axial stress elongation and dimensional stability. Polypropylene geomembranes and liners remain flexible in a variety of temperatures, and easy to seam and factory fabricate into large panels.

Polypropylene is highly chemical resistant and withstands prolonged exposure to many of the effluents normally found in industry. It has demonstrated outstanding performance when exposed to aqueous solutions such as 'black liquor' ponds found at paper mills.

Polypropylene does not stress crack (ESCR) and is thus suitable for installation in a variety of climates and terrains. It is reinforced with a rugged polyester scrim for enhanced dimensional stability, tear and puncture resistance.

A standard weathering warranty is available upon acceptance of the project by the supplier technical department.

Our Polypropylene based geomembrane offers outstanding features:

• Temperature Tolerant- Greater design flexibility is a primary benefit of the reinforced polypropylene. The geomembrane has a low coefficient of linear thermal expansion and contraction, responding to wide temperature swings without seam failure or stress cracking. It remains flexible in a wide range of temperatures. It can be installed in applications where the operating temperature can fluctuate by up to 100F. In cold climates, where temperature can drop well below freezing, the material conforms easily to the contours of the installation and remains easy to seam with hot air or wedge welder.

• Reliable Seams- The performance of any geomembrane liner or cover is only as good as its seams. Water-tight seams can be made using hot air or hot wedge type welder. Polypropylene offers the widest sealing range in the industry. As a heat weldable product it demonstrates outstanding peel and shear strength results when seamed in a variety of installation environments.

• Easy to Install and Repair- Polypropylene geomembrane is shipped to the job site in large prefabricated panels that are accordion folded and rolled for ease of placement and less field seaming. Repairs, due to mechanical damage, are easy to make by a trained maintenance crew, without the need for specialized technicians and equipment.

• Outstanding Chemical Resistance- Polypropylene geomembrane is resistant to a wide range of chemicals and aqueous solutions found in industrial impoundments and municipal solid waste landfills. The material exhibits virtually no change in physical properties after 120 day immersion testing, at elevated temperatures, in a wide range of chemicals and waste water streams. Contact Engineered Textile Products for specific chemical compatibility analysis information.

• Excellent Ultraviolet Resistance- In Xenon Arc, Weatherometer and Emmaqua testing Polypropylene geomembrane has demonstrated excellent resistance to the sun's ultraviolet rays, one of the most destructive forces degrading competitive geomembranes.

A dependable barrier- Polypropylene geomembrane forms a highly impenetrable barrier, inhibiting moisture and gas transmissivity through the membrane. The material meets the transmissivity requirement for most state and county codes for municipal solid waste landfills.
Product line- Engineered Textile Products, Inc. also fabricates and installs, PVC, and Evaloy™ materials.
To learn more about our experience in these systems or how ETP can help you with your project requirements, please call 1-or e-mail us. For further specifications on Polypropylene, see our physical properties.

PRODUCT BULLETIN

20-45 MIL
POLYPROPYLENE(PPE)

PROPERTY TEST METHOD 20 MIL VALUES 30 MIL VALUES 36 MIL VALUES 45 MIL VALUES
Gauge, nominal (mils) ASTM D751 20+/-10% 30+/-10% 36+/-10% 45+/-10%
Plies, reinforcing 9x9x1000d Polyester . 1 1 1 1
Breaking strength -
Fabric minimum (lbs)
ASTM D751, Method A 250 x 200 250 x 200 250 x 200 300 x 200
Tear strength -
minimum (lbs)
ASTM D751, Method B
Tongue Tear
100 lbs 100 lbs 100 lbs 100 lbs
Low temperature
(ºF)
ASTM D2136,
1/8" mandrel
4 hours Pass
-65ºF -65ºF -65ºF -65ºF
Dimensional Stability
percent change, maximum)
ASTM D1204,
(180ºF/1 hour)
1.0% 1.0% 1.0% 1.0%
Hydrostatic Resistance,
minimum (lbs)
ASTM D751, Method A
Procedure 1
300 psi 300 psi 350 psi 350 psi
Ply adhesion, minimum (lbs/in) ASTM D413
Machine Method
20 lbs 20 lbs 20 lbs 20 lbs
Puncture resistance (lbs) FTM 101B
Method 2031
250 lbs 250 lbs 250 lbs 250 lbs
Water Absorption
(maximum, % weight change)
ASTM D471
70ºF
<1% <1% <1% <1%
UV Resistance (lbs) ASTM G26
Xenon arc method 63ºC
Pass - 12,000
hours+
Pass - 12,000
hours+
Pass - 12,000
hours+
Pass - 12,000
hours+
UV Resistance to soil burial
(% Tensile Retention)
ASTM D3083
(per ASTM paragraph 9.5)
90% Min. 90% Min. 90% Min. 90% Min.
SEAM PROPERTIES
Bonded Seam Strength
(lbs/width)
ASTM D751
(As Modified in appendix A NSF 54)
200 lbs 200 lbs 200 lbs 200 lbs
Peel Adhesion. minimum
(lbs/inch)
ASTM D413
(As Modified in appendix A NSF 54)
20 lbs 20 lbs 20 lbs 20 lbs

The data shown above is the result of laboratory test and are intended to be used as a guide. No performance, fitness or any other warranty is intended, expressed or implied by this data.