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1. 5G performance requirements for glass fiber 
Low dielectric, low loss 
With the rapid development of 5G and the Internet of Things, higher requirements are put forward for the dielectric properties of electronic components under high-frequency transmission conditions. Therefore, glass fibers need to have a lower dielectric constant and dielectric loss. 
High strength and high rigidity 
The development of miniaturization and integration of electronic devices has brought about requirements for lighter and thinner parts, which require high strength and rigidity. Therefore, glass fiber needs to have very excellent modulus and strength. 
Lightweight 
With the miniaturization, thinning, and high performance of electronic products, the upgrade of automotive electronics, 5G communications and other products promotes the development of copper clad laminates, and requires thinner, lighter and higher performance requirements for electronic fabrics. Therefore, the electronic yarn It also requires a finer monofilament diameter and higher performance. 

2. Application of glass fiber in 5G field 
Circuit board substrate 
Electronic yarn is processed into electronic cloth. Electronic grade glass fiber cloth is used as a reinforcing material. It is impregnated with adhesives composed of different resins to make copper clad laminates. As one of the main raw materials for printed circuit boards (PCBs), it is used in the electronics industry. The most important basic material, electronic cloth accounts for about 22%~26% of the cost of rigid copper clad laminates. 
Plastic reinforced modification 
Plastics are widely used in 5G, consumer electronics, Internet of Vehicles and other related components, such as radomes, plastic vibrators, filters, radomes, mobile phone/notebook housings and other components. Especially high-frequency components have high requirements for signal transmission. Low dielectric glass fiber can greatly reduce the dielectric constant and dielectric loss of composite materials, improve the signal retention rate of high-frequency components, reduce product heating, and improve response speed. 
Fiber Optic Cable Strengthening Core 
The fiber optic cable reinforcement core is one of the basic materials in the 5G industry.Originally, metal wire was used as the main material, but now glass fiber is used instead of metal wire. The FRP fiber optic cable reinforcement core is made of resin as the matrix material and glass fiber as the reinforcement material. It overcomes the shortcomings of traditional metal fiber optic cable reinforcements. It has excellent corrosion resistance, lightning resistance, electromagnetic field interference resistance, high tensile strength, light weight, and The characteristics of environmental protection and energy saving are widely used in various optical cables.