According to the shape and length, glass fiber can be divided into continuous fiber, fixed length fiber and glass wool; according to the glass composition, it can be divided into alkali-free, chemical-resistant, high-alkali, medium-alkali, high-strength, high elastic modulus and alkali-resistant glass Fiber etc.
The main raw materials for producing glass fiber are: quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, thenardite, fluorite, etc. The production methods are roughly divided into two categories: one is to directly make molten glass into fibers; the other is to first make molten glass into glass balls or rods with a diameter of 20 mm, and then heat and remelt in various ways to make a diameter of 3 ~ Very fine fibers of 80μm. The infinitely long fiber drawn by platinum alloy plate by mechanical drawing method is called continuous glass fiber, which is generally called long fiber. Non-continuous fibers made by rollers or airflow are called fixed-length glass fibers and are generally called short fibers. Thin, short, and flocculent fibers made by centrifugal force or high-speed airflow are called glass wool. After processing glass fiber, it can be made into various forms of products, such as yarn, roving, chopped strand, cloth, belt, felt, board, tube, etc