| 摘要 |
There is described a sheet comprising two layers (2 and 100) of waterproof materials arranged between a first (3) and a second (3) layer of spunbonded fabric made of reinforced polyester. The two layers of reinforced and waterproof polyester spunbonded fabrics (103) are laterally offset one with respect to the other so as to form a protrusion (20) of the first layer with respect to the second layer on one side and a protrusion (20) of the second layer with respect to the first layer on the opposite side. Layer (100) of waterproof material is a layer of plastomeric film having such a width as to cover said protrusions (20).
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