Filtration medium with enhanced particle holding characteristics
This invention relates to an improved filter medium containing fibers which are configured to hinder the passage of particles. A nonwoven web useful as a filter medium includes a plurality of bicomponent multilobal fibers including a higher melting polymer component, a lower melting polymer componen...
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| Format | Patent |
| Language | English |
| Published |
09.11.2004
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| Online Access | Get full text |
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| Summary: | This invention relates to an improved filter medium containing fibers which are configured to hinder the passage of particles.
A nonwoven web useful as a filter medium includes a plurality of bicomponent multilobal fibers including a higher melting polymer component, a lower melting polymer component, and an interface between the polymer components. The fibers are bonded together at points of contact including the lower melting polymer components, to provide a coherent filter medium. The multilobal fibers include raised lobal regions and depressed regions between the lobes which catch, trap or ensnare particulate matter that is being filtered from a gaseous or liquid medium. The multilobal fibers may be electrecized to provide electrostatic attraction between the fibers and the particles. |
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