Moisture-imprevious panel capable of delayed hydration
AssigneeAmerican Colloid Company
InventorWilliam Alexander
Life of this patent
Estimating the term…
Abstract
A flexible or rigid panel, and method of making the panel, useful as a water barrier including an intermediate layer of a water-swellable colloidal clay, such as pentonite, sandwiched between two layers of sheet material, such as woven or non-woven fabric, or paperboard, wherein at least one one of the sheet material layers has a water-soluble coating material covering substantially the entire outer surface of the sheet material layer. The water-soluble coating is a material that dissolves upon a predetermined water contact period, having a controlled, predetermined water-solubility so that the intermediate water-swellable clay layer is protected against hydration during installation.
Claims10
A panel useful as a water barrier including first and second facing sheets having a layer of water-swellable clay therebetween, at least one of said facing sheets being water premeable and coated on substantially the entire outer surface of said facing sheet with a layer of material having a predetermined water-solubility to prevent water from passing through the coated facing sheet during installation of the panel and removable by water contact after panel installation.
A multi-layer article of manufacture useful as a water barrier comprising a pair of sheet material layers at least one of said sheet material layers being water-penetrable and having a layer of water-swellable clay therebetween said water-penetrable sheet material layer including a coating on substantially the entire outer surface of said sheet material layer with a layer of material having a predetermined water-solubility to prevent water from passing through said water-penetrable sheet material layer during installation of the article and to permit removal by water contact of the coating layer after installation to permit water to contact the water-swellable clay layer after installation.
Dependencies are inferred from the claim text.