Pultrusion is a continuous process for the manufacture of composite structures. Parts feature a constant cross-section and are made by pulling continuous reinforced fibers through a resin bath, optionally followed by a separate preforming system, and into a heated die, where the resin undergoes polymerization as the reinforcements are pulled through the die. Resin types typically include polyester, polyurethane, vinyl ester and epoxy. Pultrusion is particularly effective in production of long, relatively narrow parts used as reinforcing members or ribs in a larger structure.
Guest columnist Kevin Meyer, associate scientist, Dow Polyurethanes, The Dow Chemical Co. (Midland, MI, US), asks, and suggests some answers to, the question, "Why have polyurethanes, given their performance advantages, not been adopted in place of other thermosetting resins in a host of applications?"The markets: Civil infrastructure (2016) CompositesWorld
Aging infrastructure offers a potentially huge market for composite materials but civil projects are publicly owned, subject to regulatory oversight and, therefore, decision makers are change-resistant and decisions are, in part, cost-driven. Composites nevertheless continue to make headway.Senvion acquires RodPack composite technology for wind turbine blades CompositesWorld
RodPack, developed by NEPTCO, is composed of pultruded rods on a nonwoven fabric and is used to increase strength in spar caps for wind turbine blades.CAMX 2015 preview: Creative Pultrusions CompositesWorld
Creative Pultrusions Inc. (Alum Bank, PA, US) will emphasize that it has earned ISO 9001:2008 certification.13th World Pultrusion Conference issues call for papers CompositesWorld
Submission deadline is Oct. 16 for the March 2016 conference in Prague, Czech Republic.