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According to the shape and length, glass fiber tube can be divided into continuous fiber, fixed length fiber, and glass wool. According to glass composition, it can be divided into alkali-free, chemical-resistant, high-alkali, medium alkali, high strength, high elastic modulus, and alkali resistance.
The main raw materials for the production of glass fiber are quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, thenardite, fluorite and the like. The production methods are roughly divided into two categories: one is to directly form the molten glass into fibers; the other is to first make the molten glass into a glass ball or rod with a diameter of 20 mm, and then remelt it in various ways to make a diameter of 3 ~ Very fine fiber of 80 μm. An infinitely long fiber drawn by a mechanical drawing method by a platinum alloy plate is called a continuous glass fiber and is generally called a long fiber. Non-continuous fibers made by rolls or air streams, called fixed length glass fibers, are commonly referred to as short fibers. Fine, short, floc-like fibers made by centrifugal force or high-speed airflow are called glass wool. Glass fiber can be processed into various forms of products, such as yarn, roving, chopped strand, cloth, belt, felt, board, tube and so on.