| 摘要 |
PURPOSE: A fire-resistant protection tube for an electric communication cable is provided to protect the electric communication cable from fire for a long time when a fire breaks out. CONSTITUTION: The first glass fiber fabric layer(11) is formed on an inside of a fire-resistant protection tube(10). The first aluminium sheet layer(12) is formed on the outside of the first glass fiber fabric layer(11). A non-asbestos layer(13) is formed on the outside of the first aluminium sheet layer(12). The second aluminium sheet layer(14) is formed on the outside of the non-asbestos layer(13). The second glass fiber fabric layer(15) is formed on the outside of the second aluminium sheet layer(14). In addition, the fire-resistant protection tube(10) can be formed by the first aluminium sheet layer(12), the first glass fiber fabric layer(11), the non-asbestos layer(13), the second aluminium sheet layer(14), and the second glass fiber fabric layer(15). |
