Water-barrier of water-swellable clay sandwiched between interconnected layers of flexible fabric needled together using a lubricant
US5174231A · kind A · utility
50Cited by
4References
42Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1990 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Dec 17, 2010 |
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 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.