Glass fiber reinforced plastics (GFRP), also known as fiberglass reinforced plastics, are composite materials made from a polymer matrix reinforced with glass fibers. The polymer matrix can be a thermosetting resin, such as polyester, epoxy, or vinyl ester, or a thermoplastic resin, such as polypropylene or nylon.

The glass fibers used in GFRP are typically made from glass that has been melted and drawn into fibers. These fibers are strong, lightweight, and have excellent stiffness and tensile strength. They are usually laid out in a random or specific orientation and embedded in the polymer matrix.

GFRP has a wide range of applications, including in construction, automotive, aerospace, marine, and sports equipment industries. It is used to make a variety of products, such as pipes, tanks, boats, wind turbine blades, body panels for cars, and sports equipment such as tennis rackets and hockey sticks.

One of the main advantages of GFRP is its high strength-to-weight ratio, which makes it a lightweight and strong material. It is also resistant to corrosion, making it an ideal material for outdoor and marine applications. Additionally, GFRP is a good insulator and has excellent dimensional stability.

However, GFRP can be brittle and prone to cracking under high stress. It also has a relatively low impact strength and can be damaged by exposure to ultraviolet light. These limitations can be addressed through careful design and manufacturing processes, as well as by using advanced materials and processing techniques.