GEOMEMBRANE - POLYPROPYLENE
Permaliner is a flexible polypropylene (FPP) geomembrane lining. It is manufactured with optimum chemical and physical stability.
Advantages:
Factory fabrication is common for very flexible materials such as polypropylene, and with one of the largest fabrication facilities in the world we can provide rolls of product to almost any size with the only limitation being lifting equipment available on-site to deploy the materials. Our ability to manufacture such large panels allows Permathene to deliver complete liners to remote areas where on-site welding becomes expensive or prohibitive, as in the case of many agricultural projects where ground can be soft and boggy. These can be provided in roll form or palletised, according to customer preference, machinery available, etc.
Flexibility:
Permaliner has excellent flexibility over a wide temperature range, maintaining resistance to tear, puncture and weld seam damage. The wide temperature range (- 40° C to 80° C) and flexibility allows for many applications not suitable to other materials. With the lowest density of any of the geomembrane materials it provides for easier deployment of panels as well as the significant benefit of having a low water transmission rate. This makes FPP one of the most suitable waterproofing membranes available.
Ultra Violet, Strength and Chemical Resistance:
Permaliner has excellent UV resistance and retains flexibility even under extreme fully exposed weathering conditions. A 2.5% concentration of finest quality carbon with 97.15% polymer provides maximum protection against photochemical attack.
Permaliner FPP has a very high ESCR (Environmental Stress Cracking Resistance). ESC is promoted by such factors as chemicals, UV, temperature changes and ground settlement. The long-term flexibility and UV resistance is one of key reasons Permaliner is easily repaired if damaged, plus it has an extremely low co-efficient of linear thermal expansion (CLTE) to help prevent welded seam stress. Note: Permaliner FPP has superior dimensional stability with a CLTE half that of HDPE and LLDPE. The excellent puncture resistance of Permaliner FPP out performs other materials including LDPE and LLDPE.
Versatile:
Permaliner is a food grade material (FDA § 177.1210) with an excellent balance of chemical and UV resistance. It is 100% free of plasticisers, fillers, lubricants and other toxic stabilisers. This makes Permaliner ideal lining for tanks, reservoirs, horticultural and agricultural ponds and lakes.
Applications:
- Dam Liners: Primary and secondary containment lining for a variety of applications including water storage, fish breeding in fresh or salt water, horticultural, agricultural, decorative ponds, earth dams, embankment stabilisation, sediment ponds, canal liners, etc.
- Industrial: High chemical resistance offers applications to both primary or secondary containment functions for liquids including waste from timber treatment plants, industrial chemical storage, municipal waste.
Selection Guide:
The type and grade of liner selected is based upon several factors including cost, ease of handling, life expectation, mechanical resistance. For FPP, exposed linings we recommend a heavy grade where possible as the likelihood of mechanical damage is reduced. Exposed liners should always be fenced to prevent animals walking on the lining. Heavy geotextiles are used under the lining to prevent damage from rocks, tree roots, etc.
A lightweight (.5 mm or less) lining is generally used where on-site installation is not practical due to location or ground conditions. These lighter linings are economical, easily factory manufactured and can be installed by the owner. However, they are also more prone to damage. With proper care a service life of over 10 years can be achieved and even beyond 20 years. Liner failure is hardly ever caused by UV alone and is a combination of factors including heat, mechanical and chemical.
For installations which require maximum resistance to chemicals (especially hydrocarbons) and installations requiring higher tensile strengths we always prefer to use HDPE or LLDPE. FPP polypropylene has certain advantages for specific applications. Please contact us to discuss the options.