Glass fiber winding yarn is primarily used as electrical insulation material, industrial filtration material, and as anti-corrosion, moisture-proof, heat-insulating, sound-insulating, and vibration-damping materials. It can also serve as a reinforcing material for manufacturing reinforced plastics, reinforced rubber, reinforced plaster, and reinforced cement products.

Fiberglass is primarily used as electrical insulation material, industrial filtration material, and as anti-corrosion, moisture-proof, heat-insulating, soundproofing, and shock-absorbing materials. It can also serve as a reinforcing material for manufacturing reinforced plastics, reinforced rubber, reinforced plaster, and reinforced cement products. 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 soundproofing materials. As a reinforcing material, fiberglass possesses the following characteristics, which make its application far more widespread than other types of fibers and contribute to its rapid development. These characteristics are as follows: (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 shock absorption. (4) Inorganic fiber with non-flammability and excellent chemical resistance. (5) Low water absorption. (6) Good dimensional stability and heat resistance. (7) Excellent processability, available in forms such as strands, bundles, felts, and woven fabrics. (8) Transparent and allows light transmission. (9) Surface treatment agents with good adhesion to resins have been developed. (10) Economical pricing. (11) Non-flammable and can melt into glass-like beads at high temperatures.