Web materials exhibiting elastic-like behavior
US5968029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1998 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jan 14, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24686
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention is directed to a macroscopically three-dimensional formed substrate including a first boundary zone having a first surface pathlength and a second boundary zone having a second surface pathlength. The first and the second surface pathlengths are preferably measured when the formed substrate is in a relaxed condition. The substrate also includes an elongated zone located at least partially between the first boundary zone and the second boundary zone. The elongated zone comprises incrementally stretched regions which result in the elongated zone being elongated in a first direction of elongation and having a third surface pathlength measured when the formed substrate is in the relaxed condition. The third surface pathlength is greater than either the first pathlength or the second pathlength such that the substrate takes on a macroscopic three-dimensional configuration when the backsheet is in a relaxed condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.