Please note that this product has been discontinued and a limited amount of stock remains.

Fumapem FS-715-RFS membrane is perfluorinated cation exchange membrane - reinforced and stabilized with low resistance, high mechanical stability, low dimensional swelling, and high stability in acidic environment. The polymer composition of this membrane is based on the perflurosulfonic acid resin with short side chains.

Fumapem FS-715-RFS membrane comes in either a 10cm x 10cm or 20cm x 30cm size sheet.

Fumatech membranes are highly sensitive to differences in humidity and moisture content. Therefore the membranes can vary +/- 0.5cm from the original cut sizes. Also due to this sensitivity the manufacturer expects wrinkles to form, however soaking the membranes in deionized water will return the membranes to the full size planar state according to the manufacturer.

Fumapem FS-715-RFS Features:

• Applications: Fuel Cell (H₂ PEMFC)
• Cation Exchange Membrane
• Thickness (dry): 15 micrometers (0.59 mil)
• Sizes: 10cm x 10cm, 20cm x 30cm

Fumapem FS-715-RFS Technical Specification Sheet

Delivery:

The membrane is the transparent foil, delivered on a backing layer (colourless rigid PET foil). Peel off carefully the membrane from the backing layer. The membrane is ready for use.

Handling:

Keep membrane package closed / sealed when unused. Unpack membrane only for direct use and process immediately after opening. Store, handle and process the membrane in a clean and dust-free area. Use only new and sharp knives or blades, when cutting the membrane. Always wear protective gloves when handling the membrane. Handle with care, be sure not to puncture, crease or scratch the membrane, otherwise leaks will occur. All surfaces in contact with the membrane during handling, inspection, storage and mounting must be smooth and free of sharp projections.

Pre-Treatment and Conditioning:

The membrane does not need any pretreatment and is ready for use. Please assemble the membrane in dry form. If you have any concerns about storage, chemical stability, and pretreatment please feel free to contact us for further information.

Long Term Storage:

The membrane can be stored dry for an unlimited amount of time. However, the membrane has to be conditioned (washed and rinsed) prior to use.

Membrane Properties
Membrane	Cation Exchange Membrane
Thickness	15 µm (microns)
Appearance / Color	Transparent / Colourless
Backing Foil	PET
Delivery Form	Dry
Reinforcement	Yes
Counter Ion	H- form
Specific Area Resistance	< 0.04 Ω cm2
Specific Conductivity	> 140 mS cm-1
Ion Exchange Capacity	1.38 meq g-1
Dimensional Swelling in H2O at 25°C	2 %
Uptake in H2O at 25°C	13 wt %
Tensile Strength - max. (MPa)	> 20 MPa
Elongation to Break (%)	> 150