Fibre Cores in Winding Ropes


    WE have received the Safety in Mines Research Board Paper No. 97 upon "The Effect of Fibre Cores on Internal Corrosion in Colliery Winding Hopes", by J. E. O. Mayne*. The author states that the fibres used for the cores belong to the 'hard' group, the object of which is to provide a firm support for the steel strands of the rope. The material arrives in Great Britain in bales containing a number of so-called 'heads' and are subjected to the following four processes: (1) 'hackling', (2) spinning the fibre into yarn, (3) spinning the yarn into strands, and (4) spinning the strands into a complete core. To enable the fibre to be spun, it must be wetted by a so-called 'batching' fluid, which is 5–15 per cent of the weight of the fibre in thin mineral oil ; the core is then treated with heavy mineral oil, which forms a lubricant ; severe internal corrosion has been found in ropes containing Stockholm tar, and this material should on no account be used; this is perhaps one of the most valuable observations in the whole work. It is stated that "It is understood that the use of coal tar is also objectionable."

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    Fibre Cores in Winding Ropes. Nature 140, 818 (1937).

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