Filing Information

Inventor(s)	William Alexander ·
Assignee(s)	American Colloid Company ·  View assignee updates
Attorney/Agent(s)	Marshall, O'Toole, Gerstein, Murray & Bicknell ·
Primary Examiner	Ellis P. Robinson ·
Assistant Examiner	Watkins, III; William P. ·
Application Number	US7481454
Filing date	02/15/1990
Issue date	10/01/1991
Predicted expiration date	02/15/2010
U.S. Classifications	428/182  · 428/137  ·
International Classifications	B32B 328  ·
Kind Code	A
International Classifications	428137;182;246;454;484;913;452;448;449;485;486;514;511 ·

Patent Family

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.

Independent Claims | See all claims (10)

1. 1. 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.
2. 7. 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.