Glass fiber yarn/roving is an inorganic non-metallic material with excellent performance. It is usually used as a reinforcing material in composite materials, electrical insulating materials and thermal insulation materials, circuit substrates, etc., and is widely used in various fields of the national economy.

Pultrusion is a manufacturing process for producing continuous lengths of FRP structural shapes with constant cross-sections. Raw materials used in pultrusion include a liquid resin formulation, flexible textile reinforcing fibers and a polymer surfacing veil. In general, the pultrusion process invo