Pulse filter
OwnerArmin NIEDERHUBER, Anja KAMPEinventors
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Abstract
Filter media, filter arrangements and filters, such as air filters and pulse filters, are provided. A filter medium comprises a base web of cellulose fibers. The base web comprises a first and a second layer of cellulose fibers and a transition region between the first and the second layers. The cellulose fibers of the first layer and the cellulose fibers of the second layer are intertwined in the transition region. The the base web has a specific volume of from 4 m3/g to 9 m3/g. The first layer may comprise more cellulose fibers, expressed as mass of cellulose fibers per unit area, than the second layer.
Claims20
A filter medium comprising
- a base web of cellulose fibers, wherein the base web comprises a first layer of cellulose fibers and a second layer of cellulose fibers and a transition region between the first and the second layers,
- wherein the cellulose fibers of the first layer and the cellulose fibers of the second layer are intertwined in the transition region, wherein the base web has a specific volume from about 4 m3/g to about 9 m3/g.
A filter arrangement comprising:
- a first filter a base web of cellulose fibers, wherein the base web comprises a first layer of cellulose fibers and a second layer of cellulose fibers and a transition region between the first and the second layers, wherein the cellulose fibers of the first layer and the cellulose fibers of the second layer are intertwined in the transition region, wherein the base web has a specific volume from about 4 m3/g to about 9 m3/g and;
- a second filter.
Dependencies are inferred from the claim text.