Filter materials comprising a bipolar coating
AssigneeHelsa-Automotive GmbH & Co. KG
InventorWolfgang Czado
Life of this patent
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Abstract
The inventions directed to a process for producing non-woven fabric materials in which nano- and/or microfibers are produced by an electrostatic spinning process from a polymer melt or a polymer solution and deposited to form a non-woven fabric. A carrier material in web form is arranged or is passed through between at least two spraying devices which are in the form of electrodes for producing an electrical field and each side of the carrier material is coated with the nano- and/or microfibers of opposite polarity, which are produced by means of the spraying devices.
Claims14
A process for producing non-woven fabric materials in which nano- and/or microfibers are produced by an electrostatic spinning process from a polymer melt and/or a polymer solution and deposited to form a non-woven fabric, comprising the steps of:
- arranging or passing a carrier material in web form through between at least two opposing spraying devices, the spraying devices being connected to a generator for producing an electrical field around nano- and/or microfibers by the electrostatic spinning process;
- wherein each side of the carrier material is coated with the nano- and/or microfibers of opposite polarity, which are produced by means of the electrified spraying devices.
Dependencies are inferred from the claim text.