December 22, 2020

Toyota to continue use of our fuel cell gaskets for thenew “Mirai”
Sumitomo Riko Company Limited (Headquarters: Nakamura-ku, Nagoya-shi; President &CEO: Kazushi Shimizu) is pleased to announce that the Toyota Motor Corporation(Headquarters: Toyota-shi, Achi, President: Akio Toyoda) will continue to use our “fuel cellgaskets” in the new fuel cell electric vehicle (FCEV) “Mirai” released on December 9, 2020.
The fuel cell gasket is a rubber seal component used for fuel cell (FC) stack and it has been
improved both in quality and performance from the previous product used in the first model
released in 2014. It also has been significantly improved for mass production, is safer andhelps make FCEVs more comfortable.

FC Stacks

The New Mirai

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FCEVs are powered by electricity generated by a chemical reaction created by combining
the hydrogen and the oxygen from air in the FC stack. Known as the ultimate eco-car,
FCEVs are environmentally friendly vehicles which only produce water and do not emit any
carbon dioxide, one of the main greenhouse gases contributing to global warming.
The fuel cell gasket adopted by Toyota in its new Mirai is a rubber seal component thatprevents hydrogen, oxygen and water from leaking within the plate-shaped separator andthe power components which make up the fuel cell. The FC stack consists of 330 cells,
and each cell is equipped with our product.
Furthermore, the fuel cell gasket is a highly effective seal for temperatures ranging fromsubzero to 100℃ or higher. It also enables FCEVs to stay safer for longer and generate
power more efficiently.
For this to have once again been selected, we created new material utilizing our corecompetence, polymer materials technology, and developed a high quality and highlydurable product making full use of the sealant design technology and evaluation technology
we created to develop the first model. We also innovated the manufacturing method
through the development of materials and greatly reduced the manufacturing process bymaking high speed molding and other processes possible.
As the new trend known as CASE* emerges in the automotive industry, the government
has launched ‘Carbon neutrality’ policy to effectively achieve zero greenhouse gas
emissions by 2050, and thus, the momentum of the electric “E” trend is expected toincrease.
As a corporation which strives to be a “company that contributes to safety, comfort, andthe environment for people, society, and the earth", the Sumitomo Riko group contributes
to a cleaner and more sustainable society and comfortable mobility through our fuel cellgasket, a core component in FCEV.
※ 「C：Connected」 「A：Autonomous」 「S：Shared & Services」 「E：Electric」

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＜Sumitomo Riko’s History of Product Development for FC Stacks＞
2000’s (First Half)

Commenced development of FC products

2008

Commenced joint development of sealing components with theToyota Motor Corporation

December 2014

<Toyota releases the FCEV Mirai (first model)>Fuel cell gaskets used in MiraiApril 2015

SumiRiko FC Seal, Ltd. established to manufacture and sell FC
components (Komaki-shi, Aichi)

December 2020

<Toyota releases the new Mirai>
Fuel cell gaskets readopted in the new Mirai＜Our main components used in the new Mirai＞■ Anti-vibration rubber(1) FC Stack frame mounts
This is positioned in the part whichconnects the frame holding the FC stackcase and the body, and helps reducevibration from the air compressor and thevehicle body.

(2) Regulator mounts
This attaches to the hydrogen pressure reduction
valve and it helps reduce vibration from the valve.

(3) Hydrogen tank mounts
This is installed to secure the hydrogen tank tothe body section and it helps reduce vibrationfrom the tank valve.

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(4) Air compressor mounts
This supports the air compressor which supplies air
to the FC stack and it helps reduce vibrationfrom the compressor.

■ Hoses(1) Hydrogen Hoses
This hose supplies the hydrogen stored in thehydrogen tank to the FC stack and responds tothe extremely high level seal required to stop
small hydrogen particles.

(2) Air Hoses
This hose supplies the oxygen in the aircompressed by the air compressor to the FCstack. It is produced in a process wherecontamination control so as not to inhibit thereaction with the hydrogen.

(3) FC Cooling Hoses
This hose is used for the cooling to stabilize theelectricity generated by the FC. It is made of ahigh electrical resistant rubber material andincrease the safety of the generated electricity.

Contact Information

Sumitomo Riko Company Limited

Public Relations and Investor Relations Department
JP Tower Nagoya 1-1-1, Meieki, Nakamura-ku, Nagoya-shi, Aichi 450-6316, Japantel +81-52-571-0259 e-mail product.info@jp.sumitomoriko.com
https://www.sumitomoriko.co.jp/english/

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