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

Fumasep F-10270-PTFE-e membrane is an extruded per-flourinated sulfonic acid cation exchange membrane - PTFE reinforced. This membrane has low electrical resistance, high selectivity, very high mechanical stability, very high stability in basic and acidic environment.

Fumasep F-10270-PTFE-e membrane comes in a 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.

Fumasep F-10270-PTFE-e Features:

• Applications: Electrolysis applications and electrochemical processes requiring cation exchange membranes with high oxidative stability and highly resistant to chlorine
• Cation Exchange Membrane
• Thickness (wet): 260 - 280 micrometers (10.23 - 11.02 mil)
• Size: 20cm x 30cm
• Stability Range: pH = 1 - 14 at 90°C

Fumasep F-10270-PTFE-e Technical Specification Sheet

Delivery:

The membrane is the white foil delivered in wet form.

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.

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 which may get into contact with the membrane during inspection, storage, pretreatment and mounting must be free of sharp edges or angles. To control and minimise wrinkling it is recommended to expand membranes before cutting and module assembling by equilibration in the process solution for sufficient time.

Storage in dry conditions is preferred. If the membrane is pre-treated already, you should store in unsealed containers in 3-5 wt% NaCl solution or comparable neutral pH electrolytes.

Pre-Treatment and Conditioning:

The membrane is delivered in Na+ form and wet state. The membrane does not need any pre-treatment and is ready to use. Do not let the membrane dry out since micro-cracks may likely occur.

If you have any concerns about storage, chemical stability, and pre-treatment please feel free to contact us for further information.

Membrane Properties
Membrane	Cation Exchange Membrane
Thickness	260 - 280 µm (microns)
Appearance / Color	White
Backing Foil	None
Delivery Form	Wet
Reinforcement	PTFE
Counter Ion	Na+ form
Specific Area Resistance	< 0.45 Ω cm2
Specific Conductivity	> 55 mS cm-1
Ion Exchange Capacity	0.86 meq g-1
Dimensional Swelling in H2O at 25°C	9 - 11 %
Uptake in H2O at 25°C	22 wt %
Non-Std Modulus (MPa)	> 1000
Tensile Strength - max. (MPa)	22 - 25 MPa
Elongation to Break (%)	N/A
pH Stability Range at 90°C	1 - 14