LOW DENSITY COMPOSITE MATERIALS, THEIR PRODUCTION AND USE

摘要

Laminar structures comprising a fibre reinforced layer bonded to an expandable filler containing layer to provide improved flexural stiffness to weight ratio at lower fibre loading; a process for the manufacture of the laminar structures in which the material are selected so that migration of the expandable filler into the fibre structure of the fibre reinforced layer as they expand is minimised or prevented.