Pultrusion
Advanced Technology for Composite Profiles
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The process begins with reinforcing fibers—generally glass, although other fibers such as carbon or aramid may also be used—introduced into a bath where they are impregnated with a thermosetting polymer resin formulated according to the final requirements of the profile.
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Preforming acts as a guide for reinforcing material. Excess resin is removed through the action of the guides.
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These impregnated fibers are then drawn through a heated mold, where the polymerization reaction takes place due to the effect of temperature. The material adopts the desired geometry, and at the mold exit, a thermoset profile with the required properties is obtained.
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The profile is gripped by the clamping system and subjected to a continuous pulling process; the reinforcements are uniformly distributed throughout the profile section. Unlike traditional extrusion, where the material is pushed, in pultrusion the material is continuously pulled (from the English to pull), allowing for steady, high-quality production.
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Finally, the saw cuts the profile to the desired length.
The result is pultruded profiles, also known as GFRP (Glass Fiber Reinforced Profiles) or CFRP (Carbon Fiber Reinforced Profiles), which stand out for their high corrosion resistance, low weight, minimal maintenance, and great design versatility.
These characteristics, together with their favorable cost-benefit ratio, make pultrusion a strategic solution in fields such as construction, energy, transportation, telecommunications, and infrastructure, where long-term performance with economic efficiency is required.
