Pultrusion is a continuous, semi automated process for manufacturing composite materials. Continuous fibers or fabrics made of glass or carbon fibers are impregnated with a resin in the impregnation bath. The material is then drawn through a heated die, by a pulling system located near the end of the pultruder. The composite is then cut into lengths with a cut-off saw.
Pultruded composites are ideal for infrastructure applications, as the composites are produced with a constant cross section. This makes them directly comparable with metal products, as composite channels and I-beams, as well as other standard sections. Structures made from composites can be light, strong and have no corrosion problems.
Pultruded composites offer a real alternative to traditional materials such as steel, aluminum, plastics and wood.
High strength to weight ratio
Excellent electrical insulation
Will not warp / dent
Very good creep / fatigue performance
Can be produced with natural or pigmented finish
Very high strength
Very low weight
Excellent creep / fatigue performance
Excellent dimensional stability
Highly resistant to chemical / atmospheric conditions
Made to measure pultrusions
Many customers have found that pultrusion represents the most cost-effective method of producing complex forms where production runs are complicated.
Pultrusion offers many differing possibilities in terms of resin, reinforcement and color such that customers can 'mix and match' to suit their requirements. Aramid or carbon fibers can be used instead of glass fiber and resin systems can be modified to improve flame retardancy or include self-extinguishing properties..
The use of custom built dies makes it feasible to produce extremely complex profiles which emerge ready for use, thereby eliminating any extra machining costs.
Advantages of composite tubes
wide range, 5-250mm diameter
various wall thicknesses
good surface quality
resistance to chemicals
insulates electricity and heat
wide range of colors
profiles for the furniture industry
various lightweight structures, e.g. lightweight shelters
profiles for machine engineering, e.g. manufacture of weaving looms
electrical insulation tubes for the process industry