Industrial twisted fibrous structures are mainly applied to load-carrying situations, and the applications can be classified into four different categories
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c Fastening operations: subjected to steady and/or cyclic loading; for instance, buoy moorings
c Transporting operations: subjected to a dynamic loading superimposed on a static tension—most marine applications such as towing vessels
c Lifting operations: subjected to a small number of dynamic cycles imposed on a steady loading, such as mounting climbing
c Impact operations: subjected to a falling object; impact energy must be absorbed without failure. Safety rope is an example.
In view of the nature of the applications, it is understandable that the mechanical durability and environmental attack resistance are the prime requirements for the performance of these materials.