| 摘要 |
<p>A watertight membrane for use in roofing, comprises a bituminous mass containing an olefinic polymer with intrinsic crystallinity. Membrane comprises bituminous mass containing olefinic polymer with intrinsic crystallinity. Membrane is provided with anti-exudation layer on its surface and self-adhesive layer on its reverse face. Independent claims are also included for: (1) the process of production of membrane as claimed comprising: (a) application of bituminous mass onto first fibrous cloth sheet in such way as to coat reverse face of the first fibrous cloth from underneath, while the other face is provided with anti-exudation layer; and (b) bringing second fibrous sheet in contact with bituminous mass applied onto first sheet, and coating it instantly with bituminous mass from underneath, where the latter bituminous mass can be of self-adhesive type, or self-adhesive layer can be applied onto bituminous coat; (2) bituminous mass for production of watertight membrane, containing olefinic polymer with intrinsic crystallinity; and (3) watertight membranes assembly in which each membrane comprises bituminous mass and is provided with anti-exudation coat on its surface, and where the membranes are joined by superposing along the edges in such way that they adhere to each other along the edge forming joint whose resistance is at least 50N/5 cm.</p> |
