As we all know, carbon fiber and aramid fiber (also known as Kevlar fiber) are well-known high-performance fibers, which are widely used in aerospace equipment in advanced countries in the world. Its high-end products, such as aerospace-grade carbon fiber products above T-700 produced in Japan, and the third-generation aramid fiber product developed and produced in Russia—heterocyclic aramid fiber, are still blocked and embargoed to my country. At present, although my country has made breakthroughs in high-performance carbon fiber and aramid fiber, it is still in the product introduction stage, small batch production and trial stage. Tang Changhong, the chief designer of the Y-20, said in his public speech that "(carbon fiber) composite materials are still a major obstacle for large aircraft, and I don't think we can effectively break through this problem economically within ten years. If this problem still cannot be broken through, the use of it by our large aircraft is just a sign". In fact, there is a high-performance fiber that has not only been used in large aircraft, but also has been widely used in six major military sectors and key weapon models such as aerospace, aviation, weapons, ships, electronics, and nuclear industries—that is High-performance glass fiber developed in my country.

Glass fiber usually uses glass balls, glass rods or waste glass as raw materials, and is prepared by a series of processes such as drawing, winding, and weaving under high temperature melting conditions. 1/10 of the diameter of the hair, each bundle of fibers is composed of thousands of monofilaments. Spinning and weaving with glass makes people have to admire the imagination of scientists. People often say "glass fiber reinforced plastic", which is a product made of glass fiber cloth and resin. According to military experts, as early as the late 1960s, in order to meet the needs of my country's national defense cutting-edge products, Chinese researchers started the development of high-performance glass fibers. At that time, the third-stage engine casing of the American Minuteman II solid-fuel intercontinental missile was applied. High performance fiberglass material.

While focusing on the development of liquid ICBMs, China is also pre-researching the high-performance engine casing materials required for solid ballistic missiles, which were successfully developed in 1968 and named as Gaoqiang-1 (HS1 )glass fiber. In the mid-1970s, it successfully developed its batch product high-strength-2 (HS2) glass fiber, which was put into industrial production after passing the technical appraisal in October 1974. In the early DF-21 medium-range and DF-31 long-range solid ballistic missile engine casings, it is estimated that the above materials have been applied. With the progress of composite materials, my country's newer solid ballistic missile engines generally use carbon fiber and heterocyclic aramid fiber, but the price of high-strength-2 (HS2) glass fiber is only about half of these composite materials, and the quality coefficient requirements are not particularly high. It is also an ideal choice for short- and medium-range tactical ballistic missiles and rockets.

In the 1990s, on the basis of high-strength-2 glass fiber, Chinese researchers further improved the strength and modulus, and successfully developed high-strength-3 and high-strength-4 high-performance glass fibers. It has been widely used in the aviation field. According to information, the world's largest early warning aircraft radome - my country Air Police-2000 "mushroom ring"-shaped radome is the use of high-strength-2 glass fiber. The next-generation early warning aircraft Air Police-500 radome is also made of the same material. At present, all the radomes of advanced fighter jets in my country except the J-20 are made of D3 low-dielectric wave-transmitting glass fiber, which has the characteristics of light weight, high wave-transmitting, and wide frequency band, and is an ideal radome material. Chinese researchers have also developed glass fiber reinforced materials for radar stealth with broadband absorbing properties.

At present, almost all helicopter main blades in my country use the high-strength-4 (HS4) glass fiber developed by Chinese researchers as the composite material reinforcement material, which has high specific strength, excellent fatigue resistance and slow damage expansion. Excellent characteristics, widely replaced the previous metal blades, and the service life is several times that of the original metal blades. On the Yun-20 Yunshang and the H-6K bomber, high-strength glass fibers are widely used in the interior composite materials of the fuselage, ceilings, floors, and hatches, which not only reduces weight, but also reduces noise. According to information, for example, in the world's largest civil airliner A380-800, the weight of glass fiber composite materials exceeds that of carbon fiber composite materials, and the amount used is more than 35 tons.

According to data disclosure, high-performance glass fiber is the only material among the three major reinforcing fibers urgently needed in my country that can be mass-produced locally and can meet the requirements of high-performance composite materials. It can even be said that the industrialization of high-strength glass fiber is my country's A prerequisite for the development of the aerospace industry. Chinese researchers have well realized the idea of ​​military-civilian integration in glass fiber. By 2016, my country's glass fiber production has ranked first in the world.