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FRP products is a continuous production process of fiberglass composites with equal cross-sectional shape and size. Under the traction pressure generated by the molding equipment, the reinforcing materials (such as fiberglass roving, fiberglass mat) impregnated with matrix materials (such as unsaturated polyester resin) are continuously cured and formed in the mold system, thereby continuously obtaining fiberglass pultruded products with smooth surface, stable dimensions, and extremely high strength.
Advantages
1)Typical pultrusion speed is 0.5-2 m / min. With high production efficiency, pultrusion process is suitable for mass production and manufacturing long-sized products;
2)The resin content can be precisely controlled; and the high content of fiberglass can fully play the role of enhancing performance of materials strength.
3)Mainly reinforced with untwisted roving, the FRP products enjoy a low raw material cost. And the variety of reinforcement materials used in combination helps to increase the designability of mechanical properties. In production, choosing different reinforcement materials can give products different transverse and longitudinal strength thus to meet specific requirements.
4)FRP profiles usually have stable quality and smooth appearance.
Disadvantages
1) High mold cost, different shape of the FRP profiles use its specific mold.
2) Generally limited to the production of products with single cross-sectional shape.
3) Low transverse strength.
