Pultrusion is a continuous process for manufacture of composite materials with constant cross-section.

The term is a portmanteau word, combining “pull” and “extrusion”.

The first pultrusion patent in the United States was issued in 1951. W. Brandt Goldsworthy is widely regarded as the inventor of pultrusion.[1]

Parallel to the work of Goldsworthy, who concentrated his work on unsaturated polyester resins, Ernst Kühne in Germany developed a quite similar process in 1954, which was based on epoxy resin.

The latest innovation in this field has been developed and patented by Thomas GmbH + Co. Technik + Innovation KG in Germany 2008.

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