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Pultrusion is a continuous molding process using fiber reinforcement in polyester or other thermosetting resin matrices. Pre-selected reinforcement materials, such as fiberglass roving, mat or cloth, are drawn through a resin bath in which all material is thoroughly impregnated with a liquid thermosetting resin. The wet-out fiber is formed to the desired geometric shape and pulled into a heated steel die. Once inside the die, the resin cure is initiated by controlling precise elevated temperatures. The laminate solidifies in the exact cavity shape of the die, as it is continuously pulled by the pultrusion machine. |
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