Composite filter media
AssigneeColumbus Industries, Inc.
InventorsThaddeus J. Ptak, Russell Baldinger
Life of this patent
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Abstract
A composite filter media having excellent dust-releasing properties provided with a layer of netting formed of a low surface free energy material that is hot calendered to the upstream surface of a supporting layer formed of non-woven synthetic fibers. A filtering layer formed of non-woven synthetic fibers is laminated to the downstream surface of the supporting layer. The filtering layer may include an electrostatic charge to increase filter efficiency at a reduced pressure drop across the composite media.
Claims30
A composite air filter media comprising, in combination:
- a. at least one layer of gas-permeable supportive material having an upstream surface and a downstream surface;
- and
- b. a layer of netting formed of low surface free energy material laminated to the upstream surface of said at least one layer of supportive material.
A composite air filter media comprising, in combination:
- a. at least one layer of gas-permeable filter material having an upstream surface and a downstream surface;
- b. a first layer of netting formed of low surface free energy material that is laminated to the upstream surface of said at least one layer of filter material;
- and
- c. a second layer of netting formed of low surface free energy material that is laminated to the downstream surface of said at least one layer of filter material.
A method of forming a composite air filter media, the method comprising:
- a. forming a gas-permeable supporting layer having an upstream surface and a downstream surface;
- and
- b. laminating a netting formed of a low surface free energy material to the upstream surface of the supporting layer.
Dependencies are inferred from the claim text.