Biosoluble glass fiber filtration media
US6261335A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jul 8, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2213/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A biosoluble glass fiber filtration media includes a fibrous filtration layer of randomly oriented, entangled glass fibers which has an initial efficiency of 25% or greater as measured by ASHRAE 52.1 test method. The glass fibers forming the media have a biodissolution rate in excess of 150 ng/cm.sup.2 /hr and a mean diameter between about 2.5.times.10.sup.-5 inches and about 11.0.times.10.sup.-5 inches. Typically, the filtration layer has a thickness ranging from about 0.12 inches to about 0.35 inches and a density ranging from about 3.0 g/ft.sup.2 to about 8.0 g/ft.sup.2. The filtration has an initial pressure drop of about 0.35 inches of water or less and a dirt holding capacity of about 1.5 g/ft.sup.2 or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.