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.
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.
Learn more: http://en.wikipedia.org/wiki/Pultrusion
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