Freudenberg Sealing Technologies AG

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Thurgauerstrasse 39
8050 Zürich


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Eckdaten zu Freudenberg Sealing Technologies AG

Standort Hauptsitz
Gründungsjahr 1977
Rechtsform Aktiengesellschaft
Kapital 300'000 CHF
Handelsregister-Nr. CHE107888190
MwSt CHE107888190 MwSt
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Beschreibung der Geschäftstätigkeit: Freudenberg Sealing Technologies AG

Freudenberg Sealing Technologies ist als führender Markt- und Technologiespezialist in der Dichtungstechnik Zulieferer, Entwicklungs- und Servicepartner für Kunden verschiedenster Branchen, beispielsweise der Automobilindustrie, der zivilen Luftfahrt, dem Maschinen- und Schiffsbau, der Lebensmittel- und Pharmaindustrie oder der Land- und Baumaschinenindustrie.

Dichtung, Dichtungen, Simrit, Freudenberg, Simmerring, Dichtungstechnik, Schwingungstechnik, Innovation, sealing solutions

• Freudenberg SE, Hoehnerweg 2-4, D-69469 Weinheim (DE), Tel: +49 6201 80 0, Fax: +49 6201 88 0,

• Freudenberg Sealing Technologies Austria GmbH & Co. KG, Sparchner Straße 23, 6330 Kufstein (AT)
• Freudenberg Sealing Technologies s.r.o, Lesní 331, 53345 Opatovice nad Labem (CZ)
• Freudenberg Sealing Technologies SAS, rue de l'Etoile de Langres - Z. I. Les Franchises, 52206 Langres (FR)
• Freudenberg Sealing Technologies GmbH & Co. KG, Bahnhofstraße 18 - 20, 64385 Reichelsheim (DE)
• Freudenberg Sealing Technologies Kft., Heliport repter, 6000 Kecskemet-Kadafalva (HU)
• Freudenberg Sealing Technologies S.a.s., Viale Industriale, trav. 1, 15/19, 24060 Castelli Calepio (IT)
• Freudenberg Sealing Technologies Sp. Z o.o., ulica Rzymska 4, 03-976 Warszawa (PL)
• Freudenberg Sealing Technologies S.L.U., C/ Gurri, 1, 8150 Parets del Vallés (ES)
• Freudenberg Sealing Technologies AB, Linta Gårdsväg 5, 168 74 Stockholm (SE)

• PricewaterhouseCoopers AG, Zürich

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Freudenberg Xpress 

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Herr Guido Brüggemann

Managing Director

Frau Iliostalakti Konstantinidis


Herr Ulrich Morlock


Herr Hans Bruno Hänle

Präsident des Verwaltungsrates

Herr Heinz Wössner

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News:  Freudenberg Sealing Technologies AG

Okt 1 2018
Neues Produkt

Seals for fuel cells

Date: 1. Oktober 2018 21:59

Seals for Compact Fuel Cells
Weinheim (Germany), October 9, 2018 – In fuel cells, gas diffusion layers from Freudenberg ensure that hydrogen (as an energy carrier) and oxygen (as a reactant) are distributed across the polymer electrolyte membrane (PEM) as evenly as possible. The more homogeneously the gases flow into the membrane, the more electric current is generated onboard a fuel cell vehicle. These layers are becoming thinner and thinner to minimize installation space and to achieve the best possible heat transfer. Freudenberg Sealing Technologies has developed special seals that are attached directly to the gas diffusion layer and facilitate very thin cell designs. Since they seal the outer area of the PEM, the edge of the membrane does not require reinforcement.
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The climate goals of the Paris Agreement can only be met if all forms of transportation are gradually electrified. Aside from the growing use of battery-electric powertrains, fuel cells are playing an increasingly important role in buses, heavy-duty commercial vehicles and construction machinery. Freudenberg Sealing Technologies estimates that the fuel cell will reach a global market share of 40 percent in mobile applications by 2050. The principle behind them: A fuel cell consumes hydrogen as its fuel, transforming its energy into electric current. The electricity drives an electric motor. This involves the migration of positively charged hydrogen protons from the anode through a thin polymer electrolyte membrane (PEM), which is coated with a catalytic material, to the cathode, where it reacts with oxygen to form water. This results in a surplus of electrons from the hydrogen at the anode. If they are connected to the cathode with a separate electric circuit, they will migrate there. This produces electrical energy.
The membranes for the gas exchange need to remain uncontaminated to extend the fuel cell’s operating life. The same is true of the bipolar plate that serves as the carrier for the individual elements of a fuel cell stack and handles the rough distribution of the gases. In addition, the gases must not escape into the environment and the hydrogen must not come into direct contact with the oxygen. This makes it essential to securely seal the gas diffusion layer. Freudenberg Sealing Technologies seals also serve another important purpose within the cell: They compensate for dimensional variations that may result from the expansion of adjacent components due to heat or other factors.
As part of a new Freudenberg Sealing Technologies sealing concept, an elastomer seal is applied directly onto the gas diffusion layers during the injection molding process. The layers handle the fine distribution of gases and other tasks such as the transport of heat and water on both sides of the polymer electrolyte membrane. The PEM forms a compact and secure sealing unit with the gas diffusion layer that it encloses. The unit can be attached between the bipolar plates of a fuel cell stack, which are responsible for the gross distribution of gases and the transport of electric current. The new concept permits thin components to be designed and eliminates the need for edge reinforcement, in the form of two polymer films, that would have otherwise had to be glued onto the membrane’s edges.
As the material for the new seal, Freudenberg Sealing Technologies turned to an elastomer especially developed for use in fuel cells. Among other characteristics, it needed to feature good resistance to heavy moisture, to temperatures from 80 to 90°C, coolants and acidic environments caused by the PEM’s electrolyte material. The elastomer must exhibit the lowest possible permeation so the reactive gases only diffuse minimally through the seal. The geometry of the seal fulfills two functions: first, it must securely enclose the PEM between the two gas diffusion layers. This is ensured by a seal edge applied directly to the border of the gas diffusion layer. Secondly, it must also seal the apertures in the bipolar plates where the supply channels of a fuel cell stack run and where the hydrogen, oxygen and coolant flow. The seal also features additional, outer seal lips for this purpose.
Since it is directly attached to the gas diffusion layer, the seal makes it easier to assemble fuel cell stacks. It is also a major advantage that both the gas diffusion layer and the seal come from the Freudenberg Group. It takes a precise understanding of the individual materials and the manufacturing process to produce the two components in an injection molding tool. For example, the tool must firmly enclose the installation space for the elastomer, yet it cannot be allowed to damage a gas diffusion layer, which is only a few tenths of a millimeter thick. Working with a German supplier of fuel cell modules, Freudenberg is now developing seals for gas diffusion layers and fuel cells to series-production readiness.
Sep 27 2018
Neues Angebot

Freudenberg Express Fertigung

Date: 27. September 2018 21:59

Freudenberg Xpress
Schnell ist so einfach !
Teure Ausfallzeiten lassen sich abwenden. Freudenberg Xpress liefert kundenspezifisch gedrehte Dichtungen aus den Originalwerkstoffen und -profilen der Freudenberg-Serienproduktion – falls nötig, innerhalb von 24 Stunden. Ein einzigartiger Schnellservice für Ersatzteile, Prototypen und Kleinserien.

Standort:  Freudenberg Sealing Technologies AG

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Firmenadresse Thurgauerstrasse 39 8050 Zürich Schweiz
Postanschrift Postfach 8050 Zürich Schweiz

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