Nonwoven fabric laminate with meltblown web having a gradient fiber size structure
US6936554B1 · kind B1 · utility
63Cited by
32References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Dec 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A nonwoven fabric laminate having a meltblown layer positioned between two spunbond nonwoven layers. The meltblown layer having a gradient fiber size structure across a thickness thereof with at least one layer of coarse meltblown fibers. In one embodiment, the gradient fiber size structure has at least two layers of meltblown fibers, for example at least one layer of fine meltblown fibers and at least one layer of coarse meltblown fibers, having a mean fiber diameter difference of at least 4.0 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.