Uniform meltblown fibrous web
US6492286B1 · kind B1 · utility
16Cited by
47References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jan 13, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/697
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Multilayer meltblown fibrous webs, as well as apparatus and methods of forming the webs. The webs are produced on a rotating collector that also moves parallel to its longitudinal axis. The webs are thus formed in a helical process, and the resulting tubular web is separated in a direction parallel to a helix angle. By separating the tubular web in a direction parallel to the helix angle, a flat multilayer meltblown fibrous web is provided that allows for incorporation of feathered edges formed during the article's manufacture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.