MOISTURE-PERMEABLE WATER-PROOF SHEET FOR BUIILDING MATERIALS
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United States of America Patent
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Issued Date -
Apr 19, 2012
app pub date -
Jan 29, 2010
filing date -
Feb 13, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention provides a moisture-permeable waterproof sheet for building materials capable of maintaining an excellent nail hole sealing performance to keep waterproof thereof even after being exposed to severe environmental conditions. The moisture-permeable waterproof sheet 1 for building materials of this invention includes a non-woven fabric layer 2 having a bulk density of 0.01 g/cm3 or more, a porous polyolefin film layer 3 arranged on an upper side of the non-woven fabric layer 2 and having waterproof properties and moisture-permeability, and an air-permeable adhesive resin layer 4 made of a plurality of linearly-formed resins 11 arranged approximately in parallel with each other in a plan view and joining the non-woven fabric layer 2 and the porous polyolefin film layer 3. A width of the linearly-formed resin of the air-permeable adhesive resin layer 4 is 0.5 to 3 mm, and a width of a gap between adjacent linearly-formed resins is 0.1 to 1 mm.
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