High density nonwoven filter media

Details High density nonwoven filter media High density nonwoven filter media

B - Operations, Transporting

01

D

B01D 39/08 (2006.01) D04H 1/54 (2012.01)

Patent

CA 2203567

The invention provides a sheet filter medium having autogenously bonded uncrimped conjugate fibers which contain a polyolefin and another thermoplastic polymer that have different melting points. The filter medium has a density between about 0.07 g/cm3 and about 0.2 g/cm3. The invention additionally provides a three-dimensionally thermoformed filter medium that has a density between about 0.07 g/cm3 and about 0.5 g/cm3.

L'invention concerne un milieu filtrant sous forme de nappe comportant des fibres à deux composants non frisées liées par voie autogène, qui contiennent une polyoléfine et un autre polymère thermoplastique possédant des points de fusion différents. Ce milieu filtrant présente une masse volumique comprise entre environ 0,07 g/cm<3> et environ 0,2 g/cm<3>. L'invention se rapporte également à un milieu filtrant thermoformé en trois dimensions, qui présente une masse volumique comprise entre environ 0,07 g/cm<3> et environ 0,5 g/cm<3>.

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