Packaging cover
US5932322A · kind A · utility
5Cited by
15References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1998 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Jun 8, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A nonwoven bulky composite sheet material has first and second vapor permeable layers on opposite sides of a third layer of a bulky, flexible material. The third layer has a thickness in the range of 0.3 to 3.0 mm before being bonded between said first and second layers. The first layer, the second layer and the third layer are bonded together to form a flexible composite sheet with a thickness of at least 0.3 3 mm and a moisture vapor transmission of at least 100 g/m.sup.2 in 24 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.