Filtration media and articles incorporating the same
US6322604A · kind A · utility
60Cited by
48References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jun 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D39/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A durable meltblown filter material is provided comprising a first layer of fine polyester fibers having an average fiber diameter less than 8 micrometers and a second layer of polyester macrofibers having a significant number of fibers in excess of 12 micrometers. The macrofiber layer forms an open structure and the basis weight ratio of fine fiber layer to macrofiber layer can range from 2:1 to 10:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.