On February 4, 2021, the torch for the Beijing 2022 Winter Olympic Games was officially unveiled, marking the one-year countdown to the opening ceremony. Before the review, in the workshop of the Shanghai Petrochemical Plant, busy workers were busy assembling the torch "flying" for the Beijing Winter Olympics and Paralympics.
From the surface, the torch "flying" shape is very dynamic and energetic. In terms of design, the "flying" appearance echoes the shape of the cauldron for the opening ceremony of the Beijing 2008 Olympic Games in order to reflect the fact that Beijing will become the first "double Olympic City" in Olympic history. It is based on auspicious cloud pattern. From bottom to bottom, it gradually transitions from auspicious cloud pattern to snowflake pattern, and finally incarnates into flying flame at the top.
Not only has beautiful appearance, "flying" shell also contains "black technology". The torch's ignition system is all wrapped inside the casing and is not visible from the outside. The torch has a carbon fiber shell that feels very light.
Carbon fiber is only about a quarter the mass of steel, but seven to nine times stronger. For the first time in the world, the torch is made of a composite material made of carbon fiber and resin.
The first comment from the Winter Olympic committee was that it was light and strong enough to withstand any drop. Another is that the torch relay in winter is very cold, traditional metal materials do not feel very good, composite materials can solve this problem, avoid this very cold feeling.
As the Torch relay of Beijing Winter Olympic Games will be carried out in low temperature environment in winter, "Flying" uses hydrogen as fuel, in addition to hydrogen has the characteristics of environmental protection, but also because of the characteristics of hydrogen fuel to ensure that the torch can be used in extremely cold weather. But hydrogen burns at a temperature higher than 800 degrees Celsius. Therefore, "flying" torch shell development, took a full three months to overcome a number of technical problems.
The flame of the torch is burned from inside, the general composite materials can not be burned in the fire, to 500 degree , in the fire and then burned out. Just Shanghai Jinshan district has an enterprise research and development of a resin, the resin is fire-resistant, after the relevant test analysis. Finally, through process adjustment, it achieves both temperature resistance and fire resistance requirements, 800 degree , 900 degree can be.
As the third generation of resin materials, polysilazane resin has the characteristics of strong adhesion of organic matter and high temperature resistance of inorganic materials, as well as the advantages of corrosion resistance, wear resistance, anti-fouling and waterproof, ultra-thin film, etc., which can precisely solve the various requirements of the torch.
In the workshop, oil products are processed into black strands, each containing 12,000 carbon fiber strands, which are then woven in three dimensions to form the shell of the torch. No seams or pores can be seen, and the whole shape is integrated.
The carbon fiber is similar to the process of knitting a sweater, except that it is woven in three different threads, and then transported downstream to a factory where it is carved with radium, colored, and sprayed with high-temperature paint.
Due to the special climatic conditions of the Winter Olympics, uniform thermal materials must be cold resistant, windproof and warm, but also breathable, moisture permeable, lightweight and comfortable, to meet the needs of all scenarios to the greatest extent. It is reported that 70 percent of the multi-dimensional thermal insulation wadding is made of a variety of functional polyester staple fibers and 30 percent of it is made of a mixture of functional polyamide staple fibers. These multi-functional staple fibers can absorb converted light energy and heat energy of the human body and can achieve long-term heat storage. At the same time, the lightweight, soft, resilient and hygroscopic characteristics of staple fibers improve the comfort of thermal wadding.
source:China Fibres fashion
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