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<Most commonly utilized resins are standard thermosetting resins such as polyesters, vinyl esters, epoxies, phenolics and urethanes during the pultrusion manufacturing process. However, thermoplastic resins can also be utilized in the Pultrusion process.
Do pultruded parts need to be painted?
<For most applications, internal coloration, surfacing veils, and various UV stabilized additives eliminate the need for secondary painting applications. However, to improve the weathering properties or the appearance of a pultruded profile during outdoor exposure, coatings are highly recommended. Most commonly used coatings are Acrylics and Urethanes.
Do FRP products have UV protection?
<The resins, coatings, and wear surfaces that we utilize are extremely resistant to UV rays. Direct sunlight exposure does not degrade structural performance. There can be color fading. Polyurethane coatings are often used to eliminate color fading.
What fire resistance standards do FRP panels meet?
<Most of the FRP products are manufactured with a fire-resistant polyester or vinyl ester. They have a Class 1 or Class 2 rating per ASTM E84 and a Type 3 rating per NFPA 220, depending on the requirements. The FRP is self-extinguishing and will stop burning once the active flame is removed.
For bridge decking, If there is a large fire on or under the bridge, then steel superstructure deformation becomes a critical issue. Fire resistance has not been an issue for exterior FRP bridge decks and platforms in the past.
If there are additional fire resistance requirements, there are fire proof coating that can be added at an additional cost.
For applications requiring non-combustible materials, a phenolic resin must be used.
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