| 摘要 |
The invention relates to an anti-damp porous envelope formed by two sheets (2, 3) joined on the edges (4) thereof by means of welding and made of different materials, one of them being porous (2), water-repellant, breathable, and a barrier to bacteria, and the other one being impermeable (3) and made of a laminated plastic material formed by two layers (3a, 3b) of any plastic material, the outer layer (3a) being made of a resistant plastic material, and the inner layer (3b) being made of plastic material suitable for welding to the porous sheet (2) without using wax. The outer layer (3a) is made of polyester and the inner layer (3b) is made of polyethylene, both of variable thickness. The impermeable sheet (3) optionally has a transparent area (31) and/or includes graphical prints. The envelope contains absorbing elements (5). |
