What effects does the aging test have on the performance of ePTFE membranes?

1. Decreased physical properties
Decreased tensile strength: The membrane may become more prone to breakage and its ability to withstand external forces is reduced.
Decreased elongation at break: The flexibility is reduced and brittle fracture is more likely to occur.
2. Changes in waterproof performance
With aging, the microporous structure of the membrane may change, resulting in reduced waterproof ability and water seepage.
3. Changes in air permeability
The blockage or deformation of the micropores may affect the smoothness of gas passage, thereby reducing air permeability.
4. Appearance changes
The color may fade or turn yellow.
The surface may have defects such as roughness and cracks.
5. Reduced chemical stability
The resistance to chemicals is reduced, making it more susceptible to corrosion and erosion.
6. Poor dimensional stability
Under the influence of factors such as temperature and humidity, the size of the membrane may change irregularly.
7. Changes in thermal stability
The temperature resistance is reduced and the original performance may be lost faster at higher temperatures.