Glass fiber winding yarn is mainly used as electrical insulation material, industrial filtration material, anti-corrosion, moisture-proof, heat-insulating, soundproofing, and vibration-damping materials. It can also serve as reinforcing material for the production of reinforced plastics, reinforced rubber, reinforced gypsum, and reinforced cement products.

Fiberglass is primarily used as electrical insulation material, industrial filtration material, and as anti-corrosion, moisture-proof, heat-insulating, noise-insulating, and vibration-damping materials. It can also serve as a reinforcing material for the manufacture of reinforced plastics, reinforced rubbers, reinforced plasters, and reinforced cements. Coating fiberglass with organic materials enhances its flexibility, making it suitable for packaging fabrics, window screens, wall coverings, coverings, protective clothing, and electrical insulation and noise-insulating materials. Glass fiber, as a reinforcing material, possesses the following characteristics, which make its application much wider and its development faster than other types of fibers: (1) High tensile strength with minimal elongation (3%). (2) High elastic modulus and good rigidity. (3) Large elongation within the elastic limit and high tensile strength, allowing for significant absorption of impact energy. (4) Inorganic fiber with non-flammability and good chemical resistance. (5) Low water absorption. (6) Good dimensional stability and heat resistance. (7) Excellent processability, available in forms such as strands, rovings, felts, and fabrics. (8) Transparent and allows light transmission. (9) Surface treatment agents with good adhesion to resins have been developed. (10) Cost-effective. (11) Not easily flammable, capable of melting into glass-like beads at high temperatures.