| 摘要 |
The invention includes a process for completely foaming rigid foam slabs or blocks intended in particular for impact sound insulation and a device for carrying out the process. The invention provides a rigid foam slab of the aforementioned type which achieves on the one hand high values for dynamic elasticity, that is to say low values for dynamic stiffness, even at low values for the slab thickness, and on the other hand relatively high values for the long-term loading capacity (reduction with time of the installed slab thickness at a predetermined area pressure). These values, which are improved compared with the state of the art, result from the fact that the prefoamed granules used for slab production are, during complete foaming, allowed to relax perpendicular to the surface of the slab to be foamed. Perpendicular to the slab surface, a virtually unchanged spherical structure of the completely foamed granules across the entire slab thickness results, with especially thin cell walls, which, however, because of the special nature of the production process, are left completely undamaged or undestroyed. <IMAGE> |
