Main raw materials for producing 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. There are two kinds of production methods: one is to make fused glass into fibers directly; the other is to make fused glass into glass balls or rods with a diameter of 20 mm, and then to make very fine fibers with a diameter of 3-80 microns after heating and remelting in various ways. The infinitely long fibers drawn by mechanical drawing on platinum alloy plates are called continuous glass fibers, commonly known as long fibers. A discontinuous fiber made of rollers or airstreams is called fixed length glass fiber, commonly known as staple fiber.