Building Construction Applications for Porous Material
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United States of America Patent
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Issued Date -
Sep 10, 2009
app pub date -
Mar 5, 2009
filing date -
Mar 5, 2008
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Abstract
A barrier membrane for use in building construction may be manufactured by forming a polymeric film coating on release paper or film; or on nonwoven textiles, paper, fiberglass, or other structural substrate to improve tensile strength. Alternatively, the film may be fully or partially formed and then bonded to a structural substrate. A porous film coating or laminate may be formed using PVDF, PVC, and various polyolefins. A typical membrane may be less than 100 mil thick and greater than 50% porous, and may have a hydrostatic head while retaining gas permeability. Some embodiments may contain active ingredients to combat bacterial or fungal growth, repel insects, or absorb environmental pathogens. The active ingredients may be applied after the porous film is manufactured or may be incorporated during the film manufacturing process.
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