Pultrusion
From Wikipedia, the free encyclopedia
Pultrusion is a continuous process of manufacturing of composite materials with constant cross-section whereby reinforcing fibers are pulled through a resin, possibly followed by a separate preforming system, and into a heated die, where the resin undergoes polymerization. Many resin types may be used in pultrusion including polyester, polyurethane, vinylester and epoxy.
The actual design of pultrusion machines varies. Two popular types are reciprocating (hand-over-hand) and continuous (cat-track).
The term is a portmanteau word: "pull" + "extrusion".
The initial pultrusion patent in the United States was issued in 1951. W. Brandt Goldsworthy is widely regarded as the inventor of pultrusion. [1] Omniglass is widely recognized as the inventor of fiberglass windows made with pultruded lineals. Omniglass introduced the the world's first fiberglass window in 1984.
