| 摘要 |
The present invention relates to a process for the preparation of a mineral fibre insulating board, which insulating board comprises at least one hard layer and at least one soft layer. The process comprises provision of a primary web, compression of the primary web in one or more longitudinally extending zones, doubling of the primary web to form a secondary web, and curing and optional compression of the secondary web, the amount of binder added to the various zones lying within different ranges. |
