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The main characteristics and development trend of glass fiber composites

The main characteristics and development trend of glass fiber composites


The main characteristics of glass fiber composite material:

1. Excellent mechanical properties. The tensile strength of glass fiber composites is lower than that of steel and higher than that of ductile iron and concrete, while the specific strength is about 3 times that of steel and 10 times that of ductile iron.

2. Good corrosion resistance. Through a reasonable selection of raw materials and scientific thickness design, glass fiber composite materials can be used in acid, alkali, salt, and other organic solvent environment for a long time

3. Good thermal insulation performance. Glass fiber composite material has the characteristics of low thermal conductivity, and is an excellent insulation material, therefore, in the case of a small temperature difference, it does not need to do special insulation, can achieve a good insulation effect.

4. Low thermal expansion coefficient. Because the thermal expansion coefficient of glass fiber composite material is small, it can be used normally under various harsh conditions such as surface, underground, seabed, high cold, desert, and so on.

5. Excellent electrical insulation. It can be used to make insulators. It can still maintain good dielectric properties at high frequency. Microwave transmission is good, and suitable for use in power transmission and minefields.

The development trend of glass fiber composite materials is as follows:

1. At present, the development potential of high-performance glass fiber is huge, especially the advantages of high silicon glass fiber, high-performance glass fiber has two development trends: one is to focus on higher performance, and the second is to focus on industrial technology research of high performance glass fiber, and is committed to improving the process performance of high performance glass fiber, while reducing costs and reducing pollution.

2. There are some shortcomings in the material preparation: the preparation of some high-performance glass fibers still has the problems of glass crystallization, high filament density, high cost, and can not meet the requirements of strength in some special uses. When the thermosetting resin is used as the matrix, the prepared composite material has difficulties in secondary processing and recycling, which can only be processed by cutting, and the recovery can only be corroded by special chemical solvents and strong oxidants, and the effect is not ideal. Although a degradable thermosetting resin has been developed, the cost problem still needs to be controlled.

3. In the process of glass fiber synthesis, a new type of glass fiber composite material is prepared by various synthetic technologies. In recent years, to meet the needs of various special conditions, various surface technologies have been developed for special modification of glass fiber surface.

4. In the coming period, the global market demand, especially the demand of emerging market countries, will maintain a high growth rate, and the advantages of industry leaders will become more obvious, such as China's glass fiber enterprises represented by Boulder Group will play a leading and leading role in the future global glass fiber industry. Fiberglass composite material has become one of the main raw materials in the automotive industry, fiberglass thermoplastic material because of its good economy and good recyclability, the application has a growing trend, at this stage, the widely used fiberglass thermoplastic reinforcement material application range includes instrument panel bracket, front end bracket, bumper and engine peripheral components, The coverage of most parts and sub-structural parts of the whole vehicle is realized.

5. In addition to several large glass fiber production bases, small and medium-sized enterprises account for 35% of China's glass fiber industry output, most of them have single varieties, weak technology, and occupy more than 90% of the total number of employees, limited resources, poor management level of business risk, which is the focus and difficulty of the implementation of strategic changes in the industry. We should actively support and guide small and medium-sized enterprises to take the road of coordinated development, and strengthen cooperation and competition with the outside world through the formation of small and medium-sized enterprise groups to achieve the purpose of development. With the mutual penetration of the economy, the competition between enterprises is no longer fighting alone, but showing cooperation and joint.

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