Sound-insulating board to deaden the sound of footsteps, e.g. on stone floors or stairs, comprises low-density expanded polystyrene containing dispersed particles of higher density, e.g. aluminum flakes

摘要

Expanded polystyrene-based insulating material to deaden the sound of footsteps, in which the styrene polymer (1) has a density of less than 15 kg/m3 and contains uniformly dispersed particles of an additive with a density higher than that of (1).