Pleated filter with monolayer monocomponent meltspun media
US7947142B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2006 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | May 22, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1015
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pleated filter is made from a monocomponent monolayer nonwoven web of continuous monocomponent meltspun partially crystalline and partially amorphous oriented fibers of the same polymeric composition that are bonded to form a coherent and handleable web having a Gurley Stiffness of at least 100 mg and which further may be softened while retaining orientation and fiber structure. Rows of pleats are formed in the nonwoven web, and the web is cut to a desired size and shape to provide a pleated filter element containing a self-supporting porous monocomponent monolayer matrix of fibers bonded to one another at least some points of fiber intersection and having an average initial submicron efficiency of at least 15% at a 1.52 meters/sec face velocity. The filter element is deformation resistant without requiring stiffening layers, bicomponent fibers, adhesive or other reinforcement in the filter media layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.