| 摘要 |
The optical communication cable(10) has a core(16) which is formed by a number of light-transmitting optical fibres(14) packed in optical fibre ribbons(30). The stack(11) of the robbons(30) is hellically twisted. The inner jacket(20) forms an enveloping structure for ribbon(30) and is lined on its interior surface with a layer(18) of thermally insulating material. An outer jacket(26) is reinforced with primary strength members(24) so that together they act as a composite structure. A layer(22) thermally insulates the inner cable layers against heat generated during pressure extrusion of jacket(26).
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