long fiber and staple fiber
The main raw materials for producing glass fiber are quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, Glauber's salt, fluorite and so on. The methods of production are roughly divided into two categories: one is to make molten glass directly into fiber, and the other is to make glass balls or rods of 20mm in diameter first, and then heated and remelting in a variety of ways to make a very fine fiber with a diameter of 3~80 m. The endless fiber drawn from the platinum alloy plate by mechanical wire drawing is called continuous glass fiber. It is also known as long fiber. A discontinuous fiber made of rollers or airstreams is called fixed length glass fiber, commonly known as staple fiber.