Glass fiber reinforced polymer (GFRP) reinforcement is central to the pultrusion process, producing composites that are strong, light, and corrosion-resistant. The GFRP reinforcement gives the pultruded profile its tensile strength and stiffness, while the resin matrix contributes flexural strength and toughness.
Types of GFRP Reinforcement Used in Pultrusion
- Unidirectional roving: continuous strands of glass fiber laid down in a single direction, giving the profile high tensile strength along the fiber direction.
- Continuous filament mat: a random mat of glass fibers that supplies strength and stiffness in all directions.
- Woven fabric: glass fibers woven together into a fabric, also providing multi-directional strength and stiffness.
Where GFRP-Reinforced Pultruded Profiles Are Used
- Building and construction: beams, columns, roofing, and other structural applications.
- Transportation: automotive parts, marine components, and railway tracks.
- Industrial applications: electrical equipment, furniture, and medical devices.
Why Use GFRP Reinforcement in Pultrusion
- High strength-to-weight ratio: strong yet light, ideal wherever weight is a concern.
- Corrosion resistance: holds up well in profiles exposed to the elements.
- Durability: stands up to wear and tear over the long term.
Other Applications Worth Noting
- Wind turbine blades: GFRP pultruded profiles are used to manufacture turbine blades.
- Offshore oil and gas platforms: used in the construction of offshore platforms.
- Bridges: used to reinforce bridge structures.
New applications for GFRP pultruded profiles continue to emerge as the technology develops.
Conclusion
GFRP reinforcement is a versatile, effective material for producing a wide range of pultruded profiles, offering real advantages over other reinforcement types — chiefly its strength-to-weight ratio, corrosion resistance, and durability.