What new chemical materials are used in the Tokyo Olympics?

Tokyo Olympics 2020, the design around the theme and 3R principles (Reduce Reduce, Reuse Reuse, Recycle Recycle) became the focus of the whole venue, and various new materials and technologies added color to the Green Olympics.

In the new National Stadium, the main venue of the Olympic Games, sunshades made of polycarbonate materials (PC solar panels) have outstanding advantages: the connection is tight and reliable, which is not easy to cause leakage; it is also easy to process and build, which is conducive to shortening the construction period and reducing the cost; the cold bending characteristics of the solar panels help shape the curve of the roof; in addition, the solar panels can be recycled and reused, which is an excellent environmentally friendly material.

The highly durable acrylic emulsion adhesive used for interior wall coating in the Tokyo Olympic Stadium has excellent long-term durability and substrate adhesion. The elastomeric wall coatings, on the other hand, have excellent dirt resistance and a balance of mechanical properties. The venues also use polyether polyol (used to produce low to high density foam as a sealant) to fill the voids between building materials and reduce the risk of deformation caused by concrete expansion at high temperatures, which can keep the stadiums safe and stable.

Recycled materials made a big splash during the awards ceremony. The Tokyo Olympics podium was made from 24.5 tons of discarded household plastic. The Olympic Organizing Committee collected nearly 400,000 laundry detergent bottles from major retailers and schools across Japan, and the household plastic was recycled into fine filaments that were 3D printed to make 98 Olympic podiums. This is the first time in the history of the Olympic Games that the public participated in collecting waste plastic to make the podiums.

In two years, the Olympic organizing committee collected 78,985 tons of small appliances and 6.21 million old cell phones nationwide. Among them, such as PCBs and various semiconductor components have many waste rare earths and precious metals on them. From this e-waste, 30.3 kg of pure gold, 4,100 kg of pure silver and 2,700 kg of copper were refined through cutting-edge chemical and mechanical recycling techniques. A total of 2,500 Olympic medals were made from these materials. The e-waste manufactured into Olympic medals is also the first time in the history of the Olympics that the beds equipped for the athletes in the Olympic Village are also colorful and creative. The bed frame is made entirely of cardboard, all of which can be recycled, and is so strong that it can support 200 kg. Mattress is also different, by the upper, middle and lower three pieces, the unique design of the mattress is also very easy to clean, a flush of water to clean. A total of 26,000 beds were made for the Olympics, and they will be completely recycled after the Games.

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