Filter material for cleaning air and gases
The invention relates to a filter material for cleaning air and gases, comprising a fiber layer ( 2 ) made of cellulose fibers bonded to each other in segments by pressing, thus compacting the cellulose fibers in the pressed areas ( 4 ).
1. A filter material for cleaning air and gases, the filter material comprising:
a fiber layer comprised exclusively of pulp fibers that, across partial areas, are connected to each other by a pressing action with compression of the pulp fibers in the compressed areas;
wherein the fiber layer and optional further layers arranged on flat sides of the fiber layer form a fiber web, wherein the fiber web is crimped and is laid with formation of passages extending in a longitudinal direction of a gas or air stream to be cleaned.
2. The filter material according to claim 1 , wherein the pulp fibers in the compressed areas are pressed with heat application.
3. The filter material according to claim 1 , wherein no adhesives and no binding agents are contained.
4. The filter material according to claim 1 , comprising a first further layer arranged on a first flat side of the fiber layer.
5. The filter material according to claim 4 , comprising a second further layer on a second flat side, wherein the first and second further layers are of the same material or of materials that differ from each other.
6. The filter material according to claim 5 , wherein the first and second further layers are selected independent from each other from tissue, textile, nonwoven, or film material.
7. The filter material according to claim 1 , having a weight per surface area between 15 g/m 2 and 600 g/m 2 .
8. The filter material according to claim 7 , having a weight per surface area between 20 g/m 2 and 200 g/m 2 .
9. The filter material according to claim 1 , containing one or several additives selected from the group consisting of adsorption agents, flavor additives and auxiliary substances.
10. The filter material according to claim 9 , wherein the adsorption agents are selected from the group consisting of active carbon, zeolites, silicates, and SiO 2 .
11. A filter for cleaning gases and/or air, the filter comprising a filter material according to claim 1 .
12. A cigarette filter comprising a first filter material according to claim 1 .
13. The cigarette filter according to claim 12 , comprising an envelope layer that envelopes the first filter material.
14. The cigarette filter according to claim 12 , comprising a second filter material attached to the first filter material at an end of the cigarette filter where smoke enters the cigarette filter.
15. The cigarette filter according to claim 14 , wherein the second filter material is selected from active carbon, cellulose acetate, or paper.
16. The cigarette filter according to claim 12 , comprising a further material, providing a visual termination of the cigarette filter, arranged at and end of the first filter material where smoke exits the cigarette filter.
17. The cigarette filter according to claim 12 , wherein after composting for a duration of at most 12 weeks maximally 10% of an original dry weight of the cigarette filter is contained in a >2 mm screening fraction.