Back to results
US 4,351,873 AGranted
Double faced insulating board
AssigneeGAF Corporation
InventorDuane A. Davis
Life of this patent
Estimating the term…
Abstract
Double faced rigid polyurethane foam insulating board in which the first facing is adhered directly to the urethane foam and in which a second facing is intermittently adhered to and spaced from the first facing by areas of adhesive spaced so as to allow unrestricted lateral venting of gases from between the facings to the edges of the board.
Claims10
Thermal insulating board comprising:
- (a) a rigid closed cell foam core, the cells of which contain fluorocarbon gas;
- (b) a first continuous facing continuously adhered to a face of said core, said first facing being non-porous;
- and
- (c) a second continuous facing intermittently adhered to and spaced from said first facing by areas of water resistant adhesive, said second facing being non-absorbent and said areas of adhesive being spaced so as to allow unrestricted lateral venting of gases from between the facings to the edges of the board.
1 more element
Process for making thermal insulating board comprising:
- (a) forming a rigid closed cell foam core, the cells of which contain fluorocarbon gas and which has continuously adhered to a surface thereof a first continuous facing which is non-porous;
- (b) applying water resistant adhesive to selected areas of said first facing;
- and
- (c) then applying a second continuous facing which is non-porous over said selected areas of adhesive to thereby adhere the second facing to the first facing while simultaneously spacing the second facing from the first facing in the areas to which adhesive is applied and allowing unrestricted venting of gases from between said facings to the edges of the board.
1 more element
Dependencies are inferred from the claim text.