Composite Railroad Tie and Method of Manufacturing Same
Lightweight composite structural articles having a shell and core comprising a specially-formulated resin, and methods of manufacturing the same. In particular embodiments, the present invention relates to a composite railroad tie comprising an outer fiber-reinforced polymer shell and a unique core formed from a thermoexpandable resin mixture with microcapsules, which railroad tie is manufactured by extruding or pultruding the shell and core through a specially adapted die having a graded cavity, allowing for controlled expansion of the core as the shell and core are passed through the die.
» Number: US2017113423A1 (A1)
» Publication Date: 27/04/2017
» Applicant: STRONGWELL CORP?[US]
» Inventor: MCCROSKEY JOSHUA LYNN?[US]; LANCASTER BRIAN CHRISTOPHER?[US] (2)
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737