Water barrier of water-swellable clay or other abrasive material sandwiched between interconnected layers of flexible fabric sewn or needled together using a lubricant and/or a liquid adhesive
US5346566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1992 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Dec 16, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/667
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-layer article of manufacture includes an intermediate layer of a water-swellable colloidal clay, such as bentonite, sandwiched between two layers of flexible sheet or fabric material wherein the two flexible layers of sheet or fabric material are structurally interconnected through the intermediate clay layer, such as by needle punching, after lubrication of the clay surface with a liquid, such as water, to interconnect fibers of one fabric layer to the other fabric layer at spaced locations over essentially the entire inner surface areas of both sheet or fabric material layers. In a preferred embodiment, a water-insoluble adhesive is applied to at least one of the fabric layers to lock the interconnecting fibers in place and substantially increase the structural integrity, particularly the shear strength, of the article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.