Firma Carl Freudenberg

Michael Hauber

Ulrich Freudenberg

Walter Fottinger

Christoph Josefiak

Bernd Dietrich

Peter Barth

Gerhard Schaut

Hansjorg Grimm

Arnold Weghmann

Hans Hettenbach

Patra Hofmann

Method and device for manufacturing a flat textile structure in which two melts of at least two polymer materials are changed to the form of fibers with the aid of a spinning device and in which fibers are then combined and then solidified. The spinning device consists of a spinning rotor and the polymer materials employed have an charge difference of at least ten unit charges. The two materials are first melted separately from one another. Each melt, by means of a distributor device, is then fed to a group of outlet openings of a spinning rotor unmixed. The fibers emerging from the outlet openings are then stretched and combined to form a common flat structure with the flat structure then being charged triboelectrically by an aftertreatment.

Method and device for manufacturing a spun fleece

Method and device for producing a flat textile structure in which a melt of a polymer material is changed to the form of fibers with the aid of a spinning rotor. The still sticky fibers are impacted with a mixture of hot gas particles; the particles are then ionized in a high-voltage electrical field for longer duration of the filter effect.

Method and apparatus for manufacturing textile

In a process for manufacturing an interior fitted part for motor vehicles, such as an inside roof lining for automobiles, a staple-fiber formed fabric of a drawn polyethylene terephthalate matrix component and of a binding component is subjected at least once during the process to an annealing process, which increases the thermal stability of the fitted part. Also disclosed is a fitted part manufactured by this method.

Method for manufacturing interior fitted part for motor vehicle

A multilayer filter pack includes at least three adjacent layers of fibrous material, each of which is permanently electrically charged and not more than 10 mm thick. The upstream and middle layers are formed from fibers having a fiber diameter that decreases from layer to layer in the direction of flow and are arranged at a packing density that increases from layer to layer in the direction of flow. The third layer has a fiber diameter and packing density that is approximately equal to the fiber diameter and packing density of the first layer. The multilayer filter pack is particularly well suited for use in air-purifying systems and breath protection filters.

Multilayer electret filter and process of using same

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Weinheim, Germany

Michael Hauber