Self-adhesive vapor wrap
AssigneeProtecto Wrap Company
InventorJohn R. Hopkins, II
Life of this patent
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Abstract
A self-adhesive vapor permeable membrane having a porous sheet layer. Formed onto one surface of the porous sheet layer are a plurality of individual adhesive lines. The individual adhesive lines are spaced across the width of the porous sheet layer and extent along the length of the porous sheet layer. Portions of the porous sheet layer between the individual adhesive lines remain free of adhesive.
Claims20
A self-adhesive vapor permeable membrane, comprising:
- a porous sheet layer having a width extending between and first edge and a second edge;
- a plurality of individual adhesive lines formed on a surface and along a length of the porous sheet layer, wherein the lines are spaced from one another across the width of the porous sheet layer and wherein portions of the sheet layer between any two adjacent adhesive lines are free of adhesive.
The membrane of claim, wherein a portion of the porous sheet layer covered by the individual adhesive lines is greater than a portion of the sheet layer free of the individual adhesive lines.
A method of producing the membrane:
- slot die extruding a hot melt adhesive through a die plate having a plurality of spaced apertures onto a surface of the porous sheet layer while the porous sheet layer is moving to form a plurality of individual adhesive lines along a length of the porous sheet layer.
Dependencies are inferred from the claim text.