| 摘要 |
The board (1) has a sealing band (6) position-fixedly arranged for sealing a gap at edges (3) of the board. The band is divided into two parallel sealing strips (9.1, 9.2) in a longitudinal direction. One of the strips (9.1) is formed from an open-porous foam. The other strip (9.2) is formed from a closed-porous foam i.e. PVC foam. The open-porous foam includes an air permeability, which is determined by a Frank-testing device and two times as large as the closed-porous foam. A labyrinth is sealed against air and/or moisture. A hard foam i.e. polyurethane foam, is provided as a core. The sealing strips are adhered on a common thin flexible carrier e.g. fleece, paper, plastic film. |
