Kynar® PVDF Water Filtration Membranes
High Performance Kynar® PVDF for High Performance Membrances
- Easy processing (both NIPS and TIPS) of hollow fibers
- Consistent macro-void free structure
- Tremendous strength, ductility, resilience
- High gel strength, good spinning stability
- Uniform pore size and high permeability/throughput
- Suitable pH range: 1-13
- Radiation resistance: e-beam, gamma radiation, steam, chemical methods
Extreme Chemical Resistance & Toughness
- Tremendous resistance to harsh halogenated chemicals (Chlorine, NaOCl bleach, Chlorine dioxide, Chloramines) and acids, peroxides, aromatics, ozone and other oxidants
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Improved toughness and ductility
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Less cracking/breaking during turbulent water flow (both outside-in and inside-out/backflush flow conditions) and air-scouring operations
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The result is a membrane that is more durable, requires less maintenance (less down-time) and is tougher than PSU and PESU alternatives.
Extreme Chemical Resistance
*PES and PSU are too brittle to test after Cl and Br exposure
Let us save you years of R&D. Allow us to help you optimize your fibers :
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Model formulation
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Membrane spinning conditions
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On-site lab trials, training
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Field technical support
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Characterization - physical & chemical
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Regional support across the globe
This graph demonstrates the truly exceptional chlorine and bromine resistance of Kynar® PVDF grades. As more and more pressure is placed on municipal and industrial treatment facilities to "do more, with less", there is a greater need for extreme materials that can resist extreme conditions.
AN EXTREME WORLD
NEEDS EXTREME MATERIALS
Longer Lifetime in Halogenated Environments: Life expectancy in Cl- ppm hours for PES is 50,000; Kynar® PVDF is 1,000,000
A graphical depiction of Kynar® PVDF water filtration membranes with a hydrophilic copolymer
Kynar® resin offers durable hydrophilicity through a proprietary grafting process whereby hydrophilic blocks on the surface of the PVDF are permanently anchored by copolymerized PVDF-miscible blocks.
Tailored functionalization is a core strength of the Arkema water membrane development center.
High Throughput After Repeated Cleaning Cycles
This graph demonstrates the retention of high throughput (flux) of Kynar® resin after repeated washing/backflush cycles compared to two other commercial PVDF membranes.
View the Kynar® Product Family Page for More Grade Information
Select the Right Grade of Kynar® PVDF for NIPS or TIPS
Depending on the filtration process and specific formulation space, Arkema can recommend several grades.
NIPS Flat Sheet |
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NIPS Hollow Fiber |
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TIPS Hollow Fiber |
Each of these grades is completely soluble at 5-20% solids in each of the following solvents at ambient temperature:
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Dimethyl Acetamide
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N-Methyl-2-Pyrrolidone (NMP)
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Dimethyl Formamide
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Dimethyl Sulfoxide
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Triethyl Phosphate
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Tetramethyl Urea
A Viscosity to Match Your Process
Typical Viscosity in NMP (cps) | |||
% Solids | 10% | 15% | 20% |
Kynar® 761 | 500 | 2000 | 12000 |
Kynar® 761A | 1000 | 5000 | 25000 |
Kynar® MG15 | 1700 | 9500 | 52000 |
Typical Viscosity in DMAC (cps) | |||
% Solids | 10% | 15% | 20% |
Kynar® 761 | 220 | 1000 | 5500 |
Kynar® 761A | 450 | 2500 | 13000 |
Kynar® MG15 | 800 | 4800 |
25000 |
Regulatory Listings & Approvals
Certain Kynar® grades are approved for the following regulations. Please speak to your Arkema representative for grade-specific details.
ORGANIZATION |
REGULATION |
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National Sanitation Foundation (NSF)
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NSF-61 Potable Water, NSF-51 Food Equipment, NSF-14 Plumbing System Components |
Food & Drug Administration (FDA)
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177.2510 & 177.2600 Repeated Contact with Food, 177.1520 Single-Use Adjuvant for Use in Polyolefins 1% Concentration |
United States Department of Agriculture (USDA) |
Use in Process or Storage Areas to Contact with Meat or Poultry Food Products |
3-A Sanitary Standards Inc. (3-A SSI) |
Multiple-Use Plastic Materials Used as Product Contact Surfaces for Dairy Equipment |
United States Pharmacopeia (USP) Class VI |
USP Class VI |
Chicago Rabbinical Council (CRC) |
Kosher Certified |
- Kynar® DH100 for Waste Water Treatment in France
- Kynar® DH100 for Drinking Water Production in France
- Kynar® DH100 for Industrial Process Water in Ax les Thermes
- Kynar® DH100 for Industrial Process Water Treatment in Nailloux
- Kynar® DH100 for Industrial Process Water Treatment in Luxemborg
- Kynar® DH100 for Industrial Process Water Treatment in Rodez
- Kynar® DH100 for Industrial Process Water Treatment in Massafra
- Kynar® DH100 for Industrial Process Water, Pool Water Treatment
- Kynar® DH100 for Industrial Process Water in Maubeuge
- Kynar® DH100 for Reuse in Amherst
- Kynar® DH100 for Industrial Process Water Treatment in Mauritius
- Kynar® DH100 for Seawater Ultrafiltration
- Kynar® MG15 for Saltwater Treatment in a Cement Plant
- Kynar® MG15 for Industrial Power Plant Water
- Kynar® MG15 for Istanbul Airport Waste Water Reuse Plant
- Kynar® MG15 for Industrial RO Pre-Treatment
- Kynar® MG15 for a Seawater Treatment Plant in an Acrylic Fiber Plant
- Kynar® MG15 for Surface Water Treatment
- Kynar® MG15 for Drinking Water for Municipal Water Supply
- Kynar® MG15 for Waste Water Recovery in a Textile Production Plant
The Challenge for Global Water Supply
Globally, there is an enormous demand for superior / higher efficiency water purification processes. Almost a billion people on the planet do not have easy access to clean drinking water or basic hygiene. The continued drive toward urbanization puts more and more pressure on our ability to make dirty water clean. Simultaneously, agricultural water is being recycled more and more without adequate retreatment – a vicious cycle that puts even more pressure on the filtration challenge.
Municipal treatment facilities are forced to do more – often, without the ability to expand their operation. Consequently, they must achieve higher throughput rates – with less down-time and must use harsher and stronger cleaning agents to rehabilitate their fouled membranes.
This extreme challenge makes Kynar® PVDF an obvious choice. For decades, Kynar® PVDF has proven itself as a world leading technology in chemical resistance and durability – while being easy to process and install. Engineers all over the world know that Kynar® is a trademark for reliability and peace of mind.
Speak to the Right Person
We understand your challenges and we’re here to help. No matter where on the planet you are, we’ve got resources to help you. Our global Membrane Innovation Center is located in King of Prussia, USA – and we have regional relay technical facilities in France, China, Korea and Japan. Let us help you today with:
- Model formulation
- Process optimization
- Membrane spinning conditions
- Field technical support
- Physical characterization
- Co-development
- On-site lab trials and training
Contact Us.