Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Reexamination Certificate
1998-06-19
2001-01-09
Robinson, Ellis (Department: 1772)
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
C428S131000, C428S137000, C428S212000, C428S213000, C428S214000, C428S334000, C428S423100, C428S425100, C428S480000, C428S481000, C428S507000, C428S511000, C428S514000, C428S537500
Reexamination Certificate
active
06171680
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to a composite sheathing material having a high water vapor permeability. More particularly, the invention is directed to a multi-layered, laminated composite sheathing material which effectively precludes the passage therethrough of liquid water while permitting a high rate of water vapor permeation. The inventive composite sheathing material is useful as an exterior wall component for constructing residential and commercial buildings.
BACKGROUND OF THE INVENTION
Composite sheathing materials are widely used in the building and construction industries as wall components or panels for sheathing the walls which form the exterior surfaces of a building. Such sheathing materials may be exposed to liquid water from rain or melting snow from outside the building, and water vapor from inside the building. Preferred sheathing materials would prevent the passage of liquid water from the exterior to the interior of the building, while allowing the passage of water vapor through the sheathing material from the interior to the exterior of the building. Conventional composite sheathing materials, while preventing the passage of liquid water therethrough, only provide water vapor permeability values of up to about 1.5 perms.
It would be desirable to prepare a composite sheathing material that would substantially prevent the passage therethrough of liquid water while allowing a high rate of water vapor permeation.
SUMMARY OF THE INVENTION
Accordant with the present invention, there has surprisingly been discovered a composite sheathing material that is substantially impervious to liquid water but is highly permeable to water vapor. The composite sheathing material comprises:
a first layer of paperboard, having a first layer of a permeable resin on a surface thereof;
a core layer of paperboard;
a first adhesive layer positioned intermediate and adhered to the first layer of paperboard and the core layer of paperboard, the first adhesive layer including a plurality of apertures therethrough;
a second layer of paperboard, having a second layer of permeable resin on a surface thereof; and
a second adhesive layer positioned intermediate and adhered to the second layer of paperboard and the core layer of paperboard, the second adhesive layer including a plurality of apertures therethrough.
The inventive composite sheathing material according to the present invention is particularly useful as a wall component for the exterior walls of a residential or commercial building.
REFERENCES:
patent: 3391056 (1968-07-01), Robinson
patent: 3551270 (1970-12-01), Sharkey
patent: 4078348 (1978-03-01), Rothman
patent: 4126725 (1978-11-01), Shiflet
patent: 4467728 (1984-08-01), Horne
patent: 4564554 (1986-01-01), Mikusi
patent: 4606959 (1986-08-01), Hillinger
patent: 4866897 (1989-09-01), Yount
patent: 5220760 (1993-06-01), Dimakis
patent: 5700570 (1997-12-01), Fahmy
patent: 5712038 (1998-01-01), Yamazaki et al.
patent: 6048605 (2000-04-01), Doyle
Chevalier Alicia
Fraser Donald R.
K2, Inc.
Robinson Ellis
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