Composite fabric with controlled release of functional chemicals
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United States of America Patent
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Issued Date -
Apr 27, 2006
app pub date -
Oct 12, 2005
filing date -
Oct 26, 2004
priority date (Note) -
Abandoned
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Abstract
The fabric is of a composite construction and includes an air and liquid permeable nonwoven fabric substrate and an air and liquid permeable layer of thermoplastic resin adhered to one surface of the nonwoven fabric substrate and forming one of the exposed surfaces of the composite fabric. A functional chemical is incorporated in the thermoplastic resin layer. Preferably, the liquid permeable layer is a polyolefin film having a plurality of liquid permeable apertures extending therethrough. The functional chemical is blended with the polyolefin resin so that it is present throughout the film layer. The functional chemical diffuses from the film layer to provide for controlled release of the active functional chemical at an optimum duration and rate.
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