With the further development of science and technology, physical or chemical methods are used to modify the original chemical fiber, which is different from ordinary fiber chemical fibers, that is, differentiated fibers emerge one after another. Differentiating fibers have large variations in shape and properties that are close to or exceed natural fibers, which overcomes the basic properties of fibrils and overcomes the original deficiencies, expanding the use of chemical fibers.
Ultra-fine Khanwei; Microfiber is a general term. In general, chemical fibers with fineness close to or lower than natural fibers can be called microfibers or microfibers. The linear density of the conventional fiber monofilament is above l.lldtex, the linear density of the ultrafine fiber is below this, and the finest can reach O. Oldtex, or even smaller.
In respiration, everyone produces heat, so when astronauts work, they generate a lot of heat. If these heat are not removed, the skin will produce a lot of sweat and cover the helmet, so the astronauts will be severely dehydrated. There is a fan or water-cooled cloth in the space suit to remove excess heat. There is also a “long underwear” made up of a series of nylon and elastic rayon fibers intertwined by hoses. Cold water sent from space shuttles on the back of the astronauts or via pipes will flow through these hoses to remove excess heat from astronauts.
It can transport nutrients and discharge waste; each time the space walk will last for a long time, and the body will continue to make urine, if you go into the toilet in the space shuttle, it will waste too much time balancing the pressure of space shuttles and space suits. In the program. Therefore, astronauts wear a cloth that absorbs urine and excrement. When the work is completed, this cloth will be discarded.
Everyone will exhale carbon dioxide, astronauts are no exception. In the sealed space outside the space suit, if the carbon dioxide is not removed, its concentration will rise to a dangerous level and the astronauts will die. The air will first enter a charcoal-containing box to remove odors, which will then go into the carbon dioxide filter section, and then pass through a fan where the purifier will be de-aerated and then returned to the water-cooling system. The air temperature is maintained at 12.8°C. The conversion device on the space suit provides up to 7 hours of oxygen supply and CO2 removal.
There are nearly 500 kinds of rubber products; according to reports, the rubber products used by foreign astronauts’ space suits generally take 20 to 30 years to complete development. It took us less than 3 years to successfully develop “Shenzhou 7”. Five series and 12 specifications of nearly 500 astronaut extravehicular space suit rubber products.

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