| 摘要 |
A low density syntactic foam comprising micro-spheres bound by a cured liquid phase binder is formed by allowing the micro-spheres 1 to rise to a close packed surface layer 4 in the liquid phase binder 2, and then draining excess liquid phase binder from the mould 3 before curing. The use of the buoyant force to achieve close packing of the micro-spheres is enhanced by controlling the viscous drag and curing time in the liquid phase binder 2 by selecting predetermined amounts of diluent, which is typically acetone in an epoxy resin binder.
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