FRP Square Tube

FAQ

Q :

What are the advantages of pultruded tubes over other structural materials?

A :

The pultruded tube have a number of significant advantages over materials commonly used for structures including timber, steel, and aluminum in many structural, electrical, and environmental applications. Pultruded fiberglass is highly corrosion resistent, will not rot or decay and is not susceptible to insect attack. Unlike wood, fiberglass requires no environmentally unfriendly preservatives or repellants, does not absorb any significant amount of water and is consistent in strength and appearance piece-to-piece . Pultruded fiberglass is stronger, more rigid and lighter weight than structural timber, steel, and aluminum. Pultruded glass fiber reinforced structural shapes and plate are electrically and thermally non-conductive, impact resistant.

Q :

What is the pultrusion manufacturing process?

A :

Pultrusion is a manufacturing process for producing continuous lengths of FRP structural shapes. Raw materials include a liquid resin mixture (containing resin, fillers and specialized additives) and reinforcing fibers. The process involves pulling these raw materials (rather than pushing as is the case in extrusion) through a heated steel forming die using a continuous pulling device. The reinforcement materials are in continuous forms such as rolls of fiberglass mat or doffs of fiberglass roving. As the reinforcements are saturated with the resin mixture (“wet-out”) in the resin impregnator and pulled through the die, the gelation (or hardening) of the resin is initiated by the heat from the die and a rigid, cured profile is formed that corresponds to the shape of the die.