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Absorption capacity of ropes

Play our video to see the difference between absorption capacity of a dynamic rope with and without impregnation. The video shows everything you need to know!

This project was realized with the financial support from the state budget means by the Ministry of Industry and Trade.

Why is absorption capacity a problem?

Water absorption capacity is one of the very important properties of the rope. When a dynamic rope absorbs water, its weight steeply increases and its strength and ability to absorb impact energy of the fall decrease. Both the rope strength and the number of falls go down significantly after water absorption. This inseparable property of the rope (hydrophility) is caused by the material from which dynamic ropes are made.

Wet (and frozen) ropes lose their initial properties, in comparison with new (dry) ropes a 30% reduction of static strength is recorded and the number of drops on a drop tower decreases down to 1/3 of the initial value. Soaking influences mechanical properties after a relatively short time (about 2 hours), even a mere sprinkling with water suffices. The volume of water absorbed by new ropes lies between 40% and 45% of weight of a dry rope, in case of a used rope the absorption capacity can reach up to 60%.

A good news is that ropes regain their initial properties after due drying. This delay caused by drying could be a problem only in case of an urgent, pressing use of the rope.

What’s the way out?

The solution is a surface finish method by means of which Teflon in form of very small and uniformly distributed particles is applied to the rope sheath. These particles cover the rope surface perfectly and form an almost impermeable protective layer which is resistant to water as well as dust and other particles that could damage the rope.

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