Thursday, September 04, 2014 09:32:46
states. Nylon, on the other hand, is naturally hydrophilic so it does not have a shelf life. An easy test for older membranes is to preform
a"wetting out" test. Dipping a small portion of the membrane into water (hydrophilic membranes) or an alcohol (hydrophobic
membranes) works well. If the membrane absorbs the material, or "wets out", it has not gone past the shelf life.