Performance and application of the hottest glass f

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Performance and application of glass fiber (I)

performance and application of glass fiber in 2015 (I)

April 30, 2004

I. composition and performance of glass fiber. The glass used to produce glass fiber is different from other glass products. At present, the glass components for fibers that have been commercialized internationally are as follows

1, E-glass. Also known as alkali free glass, it is a borosilicate glass. At present, it is the most widely used glass component for glass fiber, which has good electrical insulation and mechanical properties. In the process of melting, it is widely used in the production of glass fiber for electrical insulation, and a large number of glass fiber for glass fiber reinforced plastics. Its disadvantage is that it is not allowed to take out the temperature sensor from the cooling tank, which is easy to be eroded by inorganic acids, so it is not suitable for use in acidic environment

2, C-glass. Also known as medium alkali glass, it is characterized by better chemical resistance, especially acid resistance, than non alkali glass, but poor electrical performance, mechanical strength is 10% - 20% lower than non alkali glass fiber. Generally, foreign medium alkali glass fiber contains a certain amount of boron trioxide, while China's medium alkali glass fiber does not contain boron at all. In foreign countries, medium alkali glass fiber is only used to produce corrosion-resistant glass fiber products, such as the production of glass fiber surface felt, and also used to strengthen asphalt roofing materials. However, in China, medium alkali glass fiber accounts for more than half of the output of glass fiber (60%), and is widely used in the reinforcement of glass fiber reinforced plastics and the production of filter fabrics and binding fabrics. Because its personality is lower than that of alkali free glass fiber, it has strong competitiveness

3. High strength glass fiber. It is characterized by high strength and high modulus. Its single fiber tensile strength is 2800mpa, which is about 25% higher than that of alkali free glass fiber, and its elastic modulus is 86000mpa, which is higher than that of E-glass fiber. The FRP products produced by them are mostly used in military industry, space, bulletproof armor and sports equipment. However, due to its high price, it cannot be popularized in civil use at present, and the world output is only about several thousand tons

4, AR glass fiber. Also known as alkali resistant glass fiber, it is mainly developed to strengthen cement

5, a glass. Also known as high alkali glass, it is a typical sodium silicate glass, which is rarely used to produce glass fibers because of its poor water resistance

6, E-CR glass can be formed at one time. It is an improved boron free and alkali free glass, which is used to produce glass fiber with good acid and water resistance. Its water resistance is 7 ~ 8 times better than that of alkali free glass fiber, and its acid resistance is much better than that of medium alkali glass fiber. It is a new variety specially developed for underground pipelines, storage tanks, etc

7, D glass. Also known as low dielectric glass, it is used to produce low dielectric glass fibers with good dielectric strength

in addition to the above glass fiber components, a new alkali free glass fiber has emerged in recent years. It does not contain boron at all, thereby reducing environmental pollution, but its electrical insulation and mechanical properties are similar to those of traditional E glass. In addition, there is a kind of glass fiber with double glass components, which has been used in the production of glass wool. It is said that it also has potential in making FRP reinforcement. In addition, there is fluorine-free glass fiber, which is an improved alkali free glass fiber developed for environmental protection requirements

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