Smooth, Tough, High-Heat Material for Plug Assist

A novel syntactic foam material for plug assists is made from PBT polyester engineering thermoplastic filled with hollow glass microspheres.

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A novel syntactic foam material for plug assists is made from PBT polyester engineering thermoplastic filled with hollow glass microspheres. New Eccolite Ultra from Emerson & Cuming Composite Materials, Randolph, Mass., is said to be one of the toughest materials available for this application (1.35 ft-lb/in. unnotched Izod impact), and it also withstands service temperatures up to 220 C (428 F). However, the first applications for this premium material take advantage primarily of its unusual smoothness, which produces food and medical packaging with outstanding clarity, according to Jim Teague, v.p. of sales and marketing. Eccolite Ultra is available in rods, blocks, and sheets that can be machined without dust or ribbons. Plugs reportedly won’t stick or foul and warm up fast without the need for plug heaters.