Pultrusion is a manufacturing process for producing continuous length of reinforced plastic structural shapes with constant cross-sections.
Raw materials are a liquid resin mixture (containing resin, fillers and specialized additives) and flexible textile reinforcing fibres, 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 fibreglass met and doffs of fibreglass roving, as the reinforcements are saturated with the resin mixture (‘wet-out”) in the resin bath and pulled through the die, the gelatin, 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.
Electrical & Utility, Duct rod, Fish rods, Transformer spacers, Isolation rods, Cable support rod, Corrosion resistant equipment, Food processing machines Consumer, recreation, sporting goods, Tent poles, ATV whips, Soccer poles Window shades, Flag poles, Antennas, Construction, Retaining wall pins Advertising panels, Telecommunications, Driveway markets.
Pultruded sections are well-established alternative to steel, wood and aluminium in developed counties and are fast catching up in other parts of the world, Structural sections have ready markets in oil exploration rigs, chemical industries etc.