Pultrusion

Pultrusion is a continuous process for manufacture of composite materials with constant cross-section. The term is a portmanteau word, combining 'pull' and 'extrusion'. As opposed to extrusion, which pushes the material, pultrusion works by pulling the material. Pultrusion is a continuous process for manufacture of composite materials with constant cross-section. The term is a portmanteau word, combining 'pull' and 'extrusion'. As opposed to extrusion, which pushes the material, pultrusion works by pulling the material. A very early pultrusions type patent was filed by J.H. Watson in 1944. This was followed by M.J. Meek’s filing of 1950. The first commercial pultrusions were provided by Glastic Company of Cleveland, Ohio under the patent filed in 1952 by Rodger B. White. The patent issued to W. B. Goldsworthy in 1959 helped initiate the promotion and knowledge spread within the industry. W. Brandt Goldsworthy is widely regarded as the inventor of pultrusion.