| 摘要 |
PCT No. PCT/DK84/00056 Sec. 371 Date Feb. 20, 1985 Sec. 102(e) Date Feb. 20, 1985 PCT Filed Jun. 19, 1984 PCT Pub. No. WO85/00188 PCT Pub. Date Jan. 17, 1985.A vapor barrier comprises two vapor-tight layers (1,2) and a water absorbing layer (3) interposed therebetween. Openings (5,6) are provided in both vapor-tight layers (1,2). The openings in one layer (1) are arranged in displaced positions relatively to the openings (6) in the other layer (2). The vapor barrier offers a high resistance to the diffusion of water vapor through the vapor barrier from one side towards the other, and enables condensed water formed on the other side of the vapor barrier to travel in the opposite direction and to be evaporated from the first mentioned side.
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