Glass wool belongs to a category of Fiberglass Yarn, and Fiberglass Yarn includes glass wool.
Fiberglass Yarn can be divided into continuous fiber, fixed-length fiber and glass wool according to the shape and length; according to the glass composition, it can be divided into no alkali, chemical resistance, high alkali, medium alkali, high strength, high elastic modulus and alkali resistance ( Alkali resistance) Fiberglass Yarn, etc.
The main raw materials for the production of Fiberglass Yarn are: quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, mirabilite, fluorite, etc. The production methods can be roughly divided into two categories: one is to make molten glass directly into fibers; the other is to first make molten glass into glass balls or rods with a diameter of 20mm, and then heat and remelt them in various ways to make them with a diameter of 3~ 80μm very fine fiber. The infinitely long fiber drawn by the mechanical drawing method through the platinum alloy plate is called continuous Fiberglass Yarn, commonly known as long fiber. Discontinuous fibers made by rollers or airflow are called fixed-length Fiberglass Yarn, commonly known as short fibers.
Fiberglass Yarn is divided into different grades according to composition, nature and purpose. According to standard grade regulations, E grade Fiberglass Yarn is the most commonly used, widely used in electrical insulation materials; S grade is special fiber.
