--- Wes Wada <[EMAIL PROTECTED]> wrote: > So, what is open-celled foam? >
Wes, Closed cell foam is characterized by internal bubbles that are enclosed. Air or water can't get in or out. Open cell foam is more like a sponge, in that there are holes in all the bubbles that are open to neighboring bubbles. So they can become saturated. If you've ever used foam earplugs, you know that you squeeze and compact the cylinder tightly before putting it in your ear. Then it slowly expeands to shape. This is open-cell because air can flow back in as it rebounds. Neoprene is a good example of closed cell. Nothing penetrates because the bubbles have no holes connecting them with neighbors. If you squeeze it hard between your fingers, it rebounds immediately because the bubbles have merely distorted, not emptied. Mark which happen to be open-cell ===== Mark Klemick ! GoFishGo ! [EMAIL PROTECTED] __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com
