Nonwoven web with bimodal fiber distribution
US11739451B2 · kind B2 · utility
0Cited by
9References
20Claims
0Family size
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Key dates
| Filing date | Jul 15, 2020 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Oct 10, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1233
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A nonwoven web comprising a layer of polymeric fibers, wherein, based on the total number of polymeric fibers, at least 10% the polymeric fibers in said layer are coarse fibers having a fiber diameter of 4 μm or more, and at least 10% of the polymeric fibers in said layer are fine fibers having a fiber diameter of 2 μm or less. Also described herein is a method for making the nonwoven web, comprising melt-blowing a polymer mixture comprising two immiscible or partially miscible polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.