What is a common type of matrix material used in aircraft composite laminates?

Polyester resin is commonly used as a matrix material in aircraft composite laminates because it offers a good balance of performance characteristics and cost-effectiveness. It possesses inherent properties such as corrosion resistance, good mechanical strength, and relatively low weight, making it suitable for various aerospace applications. Polyester resin is particularly valued in general aviation and some composite structures due to its ease of use during the manufacturing process, providing efficient adhesive qualities that help bind reinforcing fibers—like fiberglass or carbon fiber—within a composite structure.

Other types of resins, while sometimes used in other contexts, do not provide the same combination of properties or economy as polyester resin for composite materials in aviation.