| 摘要 |
A flexible fire resistant inner duct structure (10) is configured to contain a cable within a conduit (12). The inner duct structure (10) includes a pair of adjacent strip-shaped layers of flexible material (16, 18, 20, 22) that are joined along their longitudinal edges (25) to define a channel (14) through which the cable can extend longitudinally through the inner duct structure (10) between the layers. The adjacent layers have differing widths between their longitudinal edges (25), whereby the wider layer bulges away from the narrower layer to impart an open configuration to the channel (14). Other features of the inner duct structure (10) relate to the material of which it is formed. Such features include the structure of the material, such as a woven structure, and further include properties such as melting point, tensile strength, fire resistance, elongation, coefficient of friction, crimp resistances and compression recovery. |
