Air filtration articles
US11396726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2019 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Jul 26, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1258
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides compositions comprising cellulose fibers and cellulose ester fibers and wet laid articles made from the compositions, as well as wet laid processes to produce these compositions. More specifically, the present invention provided compositions comprising cellulose fibers and cellulose acetate fibers and wet laid articles made from these compositions as well as wet laid processes to produce these compositions. The present invention also relates to developing a composition, process, wet laid product, or articles exhibiting any one of many the desired benefits. The present invention also relates to a filter media for air filtration comprising cellulose fiber and a staple fiber; wherein said staple filter comprises cellulose ester; wherein said air permeability is higher for a given mean pore size as compared to a filtration that comprises 100% cellulose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.