The day of the opening of the Beijing Winter Olympic Games is getting closer and closer! In the workshop of Shanghai Petrochemical plant, the staff are busy assembling the torch "flying" of Beijing Winter Olympic Games and winter Paralympic Games. According to the plan, 1200 torches must be transported to Beijing by mid January. On February 4, 2021, the torch of Beijing Winter Olympic Games and winter Paralympic Games - "Feiyang" was officially launched. Photo by Ju huanzong, reporter of Xinhua News Agency On February 4, 2021, the torch "flying" was unveiled at the first anniversary of the countdown to the opening of the Beijing Winter Olympic Games. On the surface, the "flying" shape of the torch is very dynamic and dynamic. In terms of design, in order to set off that Beijing is about to become the first "double Olympic city" in Olympic history, the appearance of "flying" echoes with the shape of the main torch tower at the opening ceremony of Beijing 2008 Olympic Games. It is "bottomed" with auspicious cloud patterns. From bottom to top, it gradually transitions from auspicious cloud patterns to snowflake patterns, and finally turns into flying flames at the top. It not only has a beautiful appearance, but also contains "black technology". Huang Xiangyu, deputy general manager of Sinopec Shanghai Petrochemical Company, said that the ignition system of the torch is completely wrapped in the shell and can not be seen from the outside. The shell of the torch is made of carbon fiber material, which feels very light. Lin Shengbing, general manager of Sinopec Shanghai Petrochemical Innovation Research Institute, said that the quality of carbon fiber is only about 1 / 4 of that of steel, but its strength is 7 to 9 times that of steel. This time, the R & D team used the composite material formed by carbon fiber and resin to make the Olympic torch, which is the first in the world. The picture shows the torch of the Beijing Winter Olympic Games (taken on January 5). Photo by Xinhua News Agency reporter Zhang Tao "The first evaluation given to it by the Winter Olympic Organizing Committee is that it is light and firm, and it can't be broken by any fall. Another is that the weather during the winter torch relay is very cold, and the hand feel of traditional metal materials is not very good. Composite materials can solve this problem and avoid this very cold feeling." Huang Xiangyu said. As the torch relay of the Beijing Winter Olympic Games will be carried out in the low temperature environment in winter, "Feiyang" uses hydrogen as fuel. In addition to the environmental protection characteristics of hydrogen, the characteristics of hydrogen fuel ensure that the torch can be used in extremely cold weather. But when hydrogen is used as fuel, the combustion temperature will be higher than 800 ℃. Therefore, the development of "Feiyang" torch shell took three months to overcome a number of technical problems. Huang Xiangyu said: "The fire of the torch burns out from the inside. Generally, composite materials can not be burned in the fire. If they are burned in the fire at 500 ℃, they will disappear. At the same time, an enterprise in Jinshan District, Shanghai has developed a resin, which is fire-resistant. After our test and analysis. Finally, through process adjustment, it meets the requirements of both temperature resistance and fire resistance, 800 ℃ and 900 ℃ To. " Liu Zhangyou, the person in charge of the enterprise responsible for the production of resin, said that polysiloxane resin, as a third-generation resin material, has the characteristics of strong organic adhesion and high temperature resistance of inorganic materials. At the same time, it integrates the advantages of corrosion resistance, wear resistance, antifouling and waterproof, ultra-thin film and so on, which can just solve the various requirements required by the torch. In the production workshop, each black tow processed from petroleum products contains 12000 carbon fiber filaments. After three-dimensional weaving, the torch shell is finally made without any joints and pores, and the whole shape is integrated. "It's a bit like we knit sweaters, but it's woven in three different ways. The next step is that we get the downstream manufacturers to carve radium, color and spray high-temperature paint. Finally, we have such a beautiful torch shell." Lin Shengbing said. (Xinhua News Agency)