By H. A. McKenna, J. W. S. Hearle, N. O'Hear
The sphere of fibre rope know-how has witnessed brilliant switch and technological increase during the last few many years. on the vanguard of this transformation has been the advance of man-made fibres and smooth sorts of rope building. This guide updates the historical past and structural mechanics of fibre rope know-how and describes the categories and houses of contemporary rope-making fabrics and buildings. Following an creation to fibre ropes, the guide of fibre rope expertise takes a accomplished examine rope-making fabrics, rope constructions, houses and mechanics and covers rope creation, targeting laid strand, braided, low-twist and parallel yarn ropes. Terminations also are brought and the numerous makes use of of rope are illustrated. the most important concerns surrounding the inspection and retirement of rope are pointed out and cord trying out is punctiliously tested. the ultimate chapters assessment rope markets, distribution and legal responsibility and supply case reviews from the various environments within which fibre rope is used. The guide of fibre rope expertise is a vital reference for everybody helping within the layout, choice, use, inspection and checking out of fibre rope.
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Additional resources for Handbook of Fibre Rope Technology (Woodhead Publishing Series in Textiles)
6 Copolymers, mixed polymers and mixed fibres There are four ways in which two or more polymer types can be combined in ropes: copolymerisation; co-extrusion; bicomponent fibres; mixed fibres. In copolymers, which have been little, if at all, used so far in ropes, different monomers are polymerised together. Monomers A and B can be made into the following types of copolymer: • • • random copolymer: –AAABAABBBABBAAAABABBBAABABBBAABAAA– block copolymer: –AAAAAAAAAABBBBBBBBBBBBBBAAAAAAAAAAA– graft copolymer: –AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA– | | BBBBBBBBB BBBBBBBBB In co-extrusion, two or more different polymers can be blended in the melt and extruded together*.
23 23 Traditional rope store near the docks at Istanbul, Turkey. A 25-cm thick Spectra HMPE rope used on the Lindsey Foss, ‘the world’s largest and most powerful tugboat’. From Seattle Times, April 17, 1994. Fig. 24 Hoisting supplies to a monastery in Meteora, Greece. Drawn by B. Barkskij in 1745. Fig. 25 Lifting 770-tonne steel foundation into place at a construction site with slings made of high modulus fibre. Introduction to fibre ropes Fig. 26 Most architectural structures still use steel cables, as in this picture.
Yarns are produced by melt-spinning and drawing, but the temperatures are lower and the processes easier than for nylon or polyester. The resulting fibres are semi-crystalline. Polymer granules are easily available and many ropemakers have their own smallscale production units. Tapes and slit films can also be produced and used to make ropes. The films may be fibrillated by mechanical action, in order to increase flexibility. Some coarse polypropylene is cut into long lengths and spun into yarns in the same way as for a natural fibre.
Handbook of Fibre Rope Technology (Woodhead Publishing Series in Textiles) by H. A. McKenna, J. W. S. Hearle, N. O'Hear