Sandia National Laboratory develops high-strength TEPIC structural foam
By Staff | May 2004
Researchers at the U.S. Department of Energy's Sandia National Laboratory (Livermore, Calif., U.S.A.) have developed a high-temperature, high-strength structural foam called TEPIC for prototype and production run composites tooling. Originally developed as a structural support material for an aerospace project, TEPIC was recently reintroduced as a candidate for high-performance tooling applications.
The modified polyisocyanurate material is castable and, unlike standard tooling board stock, can be produced in thick, one-piece sections or shapes. According to co-inventor LeRoy Whinnery, TEPIC exhibits very high dimensional stability and can retain its high compressive strength even in autoclave conditions of 400°F/204°C at a pressure of 100 psi, enabling its use for high-temperature carbon prepreg materials. Further, says Whinnery, the material is compatible with many standard mold releases and commercial adhesive systems. Density can be varied from 0.8 gm/cc to 0.2 gm/cc by adjusting the resin mix and the degree of foaming, to achieve lighter-weight tools if needed.
Sandia invites interested parties to contact the laboratory for licensing and commercialization opportunities. More than a dozen firms have expressed interest to date. Contact Scott Vaupen at (925) 294-2322.
