Polyamide nanofiber nonwovens for filters
US11376534B2 · kind B2 · utility
2Cited by
27References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2020 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Jun 16, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2571/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter comprising a nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.