Method and apparatus for determining transpiration characteristics of a permeable membrane
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United States of America Patent
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May 22, 2007
Grant Date -
Nov 16, 2006
app pub date -
Mar 4, 2005
filing date -
Mar 4, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method for measuring the transpirational characteristics of a permeable polymeric membrane, particularly polymeric membranes used for bandages. The polymeric membrane is placed against a moisture source. A probe is applied to the other side. Signals from the probe are sampled at a high rate to detect a first transient appearance of moisture on the surface being measured. The interval between the first transient response and a predetermined equilibrium value defines the transpirational characteristics of the polymeric membrane.
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