Analysis of the advantages of carbon fiber and glass fiber

Both carbon fiber and glass fiber are commonly used reinforcement materials. In the actual application process, they are often used as composite materials with resin and metal. This article, Boshi Carbon Fiber Editor, will introduce the difference between carbon fiber and glass fiber.

Carbon fiber is made of polyacrylonitrile, viscose fiber, pitch fiber and other raw filaments as raw materials, and is made by high-temperature carbonization and graphitization. It is a high-strength fiber material with a carbon content of more than 90%. The well-known advantage of carbon fiber is its light weight and high strength. Its density is only 1.6g/cm³, while the commonly used structural material steel has a density of 7.8g/cm³. Even the light weight metal material aluminum has a density of 2.7g/cm³. , The lightweight of carbon fiber composite materials is more obvious.

In addition to lightweight, the mechanical properties of carbon fiber composite materials are also more obvious. The tensile strength of carbon fiber composite materials can reach 3,600 MPa, which is several times that of steel. Its specific strength and specific modulus have more advantages than most structural materials and can meet the strength requirements. Carbon fiber is a non-metallic material, resistant to acid, alkali and salt corrosion, and has electrical conductivity, excellent electromagnetic shielding performance, and a relatively long service life. In some special fields, it can extend the service life of the equipment and expand its application fields.

Glass fiber is also a more frequently used non-metallic reinforcing material, which is mainly made of quartz sand, limestone, dolomite, boronite and other minerals as raw materials, through high-temperature fusing, wire drawing, winding, weaving and other processes. It is often used as a reinforcing material, insulating material, and heat insulating material. Its density is about 2.5g/cm³, and its tensile strength is about 2800MPa. The glass fiber is an inorganic fiber, the elongation is about 3%, the insulation performance is good, and it is also resistant to acid and alkali corrosion.

Compared with carbon fiber, glass fiber has high output, mature production technology, and much lower price. In terms of overall performance, carbon fiber has more advantages. On the whole, the two have their own merits, and the specific choice of material as the reinforcement depends on the specific application field.