Epoxy core with expandable microsperes

Details Epoxy core with expandable microsperes Epoxy core with expandable microsperes

B - Operations, Transporting

29

C

B29C 44/16 (2006.01) A63B 59/14 (2006.01) B29C 44/08 (2006.01)

Patent

CA 2633406

A method of fabricating a formed structure with expandable polymeric shell microspheres. A first plurality of polymeric shell microspheres are heated from an unexpanded state to an expanded state to form a plurality of expanded microspheres. The plurality of expanded microspheres are mixed with an epoxy resin and a second plurality of unexpanded polymeric shell microspheres. The mixture is formed in a shape to create a preform. The preform is wrapped with fiber tape to create a wrapped preform. The wrapped preform is placed in a mold. The mold is heated and the second plurality of unexpanded microspheres expand from an unexpanded state to an expanded state. The mold is cooled and the formed structure is removed from the mold.

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