ANSI/NSF-61 Geomembranes Drinking Water Contact Certification (Potable Grade)
Reinforced Polypropylene Geomembrane
Reinforced Polypropylene Geomembrane is a heat-weldable polyester reinforced sheet designed for floating covers and liners in potable and industrial water containment applications. The membrane is specifically formulated for long-term use in buried or exposed geomembrane applications. T
IMPORTANT: The membrane is based on a UV-stabilized polypropylene copolymer that does not require either polymeric or liquid plasticizers to maintain
flexibility. Plasticizes from other commercial grade liners can leech harmful chemicals into drinking water/ water supply. This can be extremely hazardous to human health. Examples of this would be found in PVC- Polyvinyl Chloride liners.
Physical properties of the membrane are enhanced by a strong, polyester fabric (scrim) that is encapsulated between the polypropylene based top and bottom plies. The combination of the fabric and polypropylene provide reinforced membranes with high breaking / tearing strength and puncture resistance.
The relatively smooth surface of the GeoMembrane facilitates production of a total surface fusion weld that creates a consistent, watertight monolithic sheet.
- Potable grade liners with NSF/ANSI 61 certification are geomembrane liners designed for contact with drinking water.
- The certification is issued by the National Sanitation Foundation (NSF) and the American National Standards Institute (ANSI).
- These liners undergo rigorous testing to ensure they do not introduce harmful chemicals or contaminants into the drinking water supply.
- The certification evaluates the liner's performance to meet strict limits and criteria for impurities, including heavy metals and volatile organic compounds (VOCs).
- Potable grade liners with NSF/ANSI 61 certification are used in water storage tanks, reservoirs, and other water containment systems to maintain water quality and safety.
- They provide assurance to regulatory authorities, water utilities, and consumers that the liner is of high quality and safe for use with drinking water.
- The liners play a critical role in preserving the integrity of water containment systems and delivering clean and safe drinking water to the public.
NSF Certified Applications:
It is important for applications that come in close contact to the human food supply to use NSF certified liners.
Candidates would include:
* Hydroponic and Organic Farming * Aquaponics * fish ponds * irrigation ponds * canals to name a few.
ANSI/NSF-61 Drinking Water Contact Certification (Potable Grade)
- Outstanding heat seamability
- Outstanding puncture resistance
- Plasticizer-free, does not contain liquid or polymeric plasticizers
- Excellent low temperature impact resistance
- Excellent chemical and environmental stress-cracking resistance
- Exceptional resistance to solar UV, ozone, and oxidation
- Low water vapor permeance and water absorption
- Hot melt extrusion processed (not calendered) for complete scrim encapsulation
- Warp knitted fabric (not woven) for smooth surface and greater thickness-over-scrim
- Polyester reinforcing fabric which is resistant to degradation by soil bacteria
Polypropylene Geomembrane Colors and Mil Thicknesses
Available colors are black and tan in 36-mil, 45-mil and 60-mil thicknesses.
Special colors, with minimum quantity requirements, are available on request.
Stocked roll sizes are
- 12 ft wide by 600 ft in 36-mil
- 45-mil and 12 ft wide by 400 ft in 60-mil.
Polypropylene Geomembrane Typical Properties and Characteristics
- 0.17 lb/ft 2 (0.83 kg/m 2 ) for 36-mil
- 0.21 lb/ft 2 (1.03 kg/m 2 ) for 45-mil
- 0.29 lb/ft 2 (1.42 kg/m 2) for 60-mil membrane.