Generally speaking, ropes made from HMPE are sensitive to long-term loads, meaning that lines made with the material elongate proportionally over time. This is known as creep – a process that will ultimately limit the lifespan of a line.
Q: How do mooring lines made with Dyneema® SK78 compare to generic HMPE alternatives when it comes to creep?
A: Mooring lines made with Dyneema® SK78 offer at least 4x longer creep lifetime than any HMPE fiber – helping to keep mooring ropes and lines in service for longer.
Q: What are the external factors that can influence creep life? A: The creep life of HMPE fibers is influenced by the ambient temperature and the applied load. Very high loads or a high temperature will accelerate the creep process. Those made by DSM offer the highest creep life and the lowest rope weight.
Q: How can creep rates be predicted?
A: Over the course of a multi-year research program, DSM has developed the Creep Performance Tool, which takes into account parameters including: type of HMPE, temperature, time, and tension. With this model, DSM is capable of predicting creep rate and elongations, and estimating creep lifetime of all its applications made with Dyneema® SK78.
Whitepaper ‘Selecting the right fiber for mooring lines’
For more information on the exceptional tension fatigue properties delivered by Dyneema® SK78, download our new whitepaper. Convince your organization that it’s time to change to mooring lines with Dyneema® SK78.
Dyneema® SK78 fiber is renowned for its quality, consistency and performance. This has resulted in an Approval of Manufacturing Certificate by DNV GL, and in a Notification for Approval of Filament by ClassNK. If you want to know more about our certifications, please contact us