Pleatable nonwoven composite article for gas filter media
US5820645A · kind A · utility
54Cited by
19References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | May 23, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/45
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A composite nonwoven fabric suitable for undergoing pleating to form filtration media includes two nonwoven fabric layers which are adhesively bonded. One layer is an air permeable nonwoven web of continuous filaments. A high loft nonwoven batt of staple fibers is laminated to the nonwoven web layer. The nonwoven batt has a gradient fiber density and includes a first layer of relatively low denier fibers and a second layer of relatively higher denier fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.