Asahi Glass’s proud advanced technology is being adopted for various uses.
The Allianz-Arena, Germany is a football stadium in Munich, a city in Germany, known best for football. Walls surrounding the arena are shaped in a fluffy, soft configuration. This unique design was achieved by Asahi Glass's fluoropolymer technology.
One of the points when designing a football stadium like the Allianz-Arena, Germany is its impact on natural turf. Sunlight is essential for the growth of natural turf in any football stadium. Because Munich in Germany is located at a high latitude, the sun slants through the arena. Because of this, ingenuity was needed so that the walls and roof would not block natural light. A material that could protect spectators from the elements, but still allow the easy penetration of sunlight to natural turf, was sought, and Asahi Glass's "ETFE Film" solved the difficult problem. The ETFE Film is a highly functional material that can be described as the crystallization of Asahi Glass's fluoropolymer technology. It looks and feels like a slightly thick, clear file folder for storing documents, but amazing functions are stored there. One of the functions that is most important is its light transmission (the rate of light penetrating a material). It is necessary to invite sunlight as much as possible so that the natural turf will not wither. The light transmission of the ETFE Film is surprisingly more than 90%. One can guess how much the film allows the penetration of sunlight, because the light transmission of ordinary glass is in the 80% range. Moreover, the ETFE Film is lighter than glass, and highly resistant to soil. Because of this, the film is easy to use as a construction material, and also easy to maintain.
It can be said that the strikingly impressive form of the arena was designed and achieved owing to the ETFE Film. It is nearly impossible to form free curved surfaces with glass, but curved surfaces can be formed easily with the ETFE Film, which is like a thin plastic sheet. The ETFE Film also plays a role in creating the atmosphere for the whole arena. When there is a game with a German football team whose home stadium is the Allianz-Arena, Germany, wall surfaces that are white at ordinary times are changed to pure red, or blue to match the respective team colors. This can be done by projecting a red light or a blue light from behind the translucent ETFE Film. An unreal atmosphere can be generated by adjusting and diffusing lights skillfully with the use of its high light transmission.
In this way, the Allianz-Arena, Germany has the world's leading-edge design and functions, but it was not decided initially to use Asahi Glass's ETFE Film. Asahi Glass won over its competitors because Asahi Glass's 30-year efforts for projects in, and expertise in fluoropolymer technology were recognized as a brand. Approximately 200,000 square meters (about five times the area of the Tokyo Dome) of the ETFE Film was used for the Allianz-Arena, Germany. No other company in the world but Asahi Glass could produce that much of the material from start to finish. Both the functions and design of the Allianz-Arena, Germany were achieved by Asahi Glass's comprehensive technological strength that had been accumulated, including developmental technology, manufacturing technology, and evaluation technology. In other words, it can be said that the Allianz-Arena, Germany would not have been constructed without Asahi Glass's technical strength.