Method for Producing a Filter Medium, and a Filter Medium
AssigneeMann+Hummel GmbH
InventorsJens Neumann, Anton Kreiner, Markus Weindl, Christian Zisslsberger
Life of this patent
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Abstract
In a method for producing a filter medium, at least one substrate layer of a nonwoven comprising cellulose fibers and/or synthetic polymer fibers is provided and a fiber layer of polymer fibers is deposited on the at least one substrate layer. Prior to depositing the fiber layer, a solvent is applied to the at least one substrate layer, wherein a material of the substrate layer and/or a material of the fiber layer is soluble in the solvent. A filter medium produced by the method has material-fused connections at crossing points of the polymer fibers and/or cellulose fibers of the substrate layer with the polymer fibers of the fiber layer.
Claims14
A filter medium comprising:
- at least one substrate layer of a nonwoven comprising
- polymer fibers and/or cellulose fibers;
- a solvent applied onto the at least one substrate layer of the nonwoven;
- and
- further comprising
- a fiber layer of polymer fibers arranged directly on the at least one substrate layer of the nonwoven;
- wherein a material of the at least one substrate layer and/or a material of the fiber layer is soluble in the solvent;
- wherein the filter medium further comprises material-fused connections arranged on first crossing points of the fibers of the at least one substrate layer with the polymer fibers of the fiber layer.
Dependencies are inferred from the claim text.