Classification of glass fibers

According to the shape and length, glass fiber can be divided into continuous fiber, fixed length fiber and glass wool; According to the composition of glass, it can be divided into alkali free, chemical resistant, high alkali, medium alkali, high strength, high elastic modulus and alkali resistant glass fiber.

Glass fiber is divided into different grades according to composition, nature and use. According to the standard, Grade E glass fiber is the most widely used and widely used in electrical insulation materials; Grade s is a special fiber. Although the output is small, it is very important. Because it has super strength, it is mainly used for military defense, such as bulletproof box, etc; Grade C is more chemical resistant than Grade E and is used for battery isolation plate and chemical poison filter; Class A is alkaline glass fiber, which is used to produce reinforcement.

Production of glass fiber

The main raw materials for producing glass fiber are quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, mirabilite, fluorite, etc. Production methods can be roughly divided into two categories: one is to directly make molten glass into fibers; One is to make the molten glass into a glass ball or rod with a diameter of 20mm, and then heat and remelt it in various ways to make it with a diameter of 3 ~ 80 μ Very fine fiber of M. The infinite fiber drawn by mechanical drawing through platinum alloy plate is called continuous glass fiber, which is generally called long fiber. Discontinuous fibers made by roller or air flow are called fixed length glass fibers, commonly known as short fibers. The fine, short and flocculent fibers made by centrifugal force or high-speed air flow are called glass wool. After processing, glass fiber can be made into various forms of products, such as yarn, twistless roving, chopped precursor, cloth, belt, felt, plate, tube, etc.