Dyneema Cover - The Latest Addition to Your Tool Kit

 
Dyneema is the strongest fibre in the world. 10 times stronger than steel, and 7 to 10 times lighter than a steel wire of equivalent size, Dyneema is one of the most durable and sought-after materials on the sailing market. No stranger to the benefits of Dyneema, we have covered its various uses in previous blogs… e.g. would you trust Dyneema with your lifelines?However – in a first for upffront.com – we are now stocking specialist Dyneema cover range online!

Although professional riggers tend to have heaps of Dyneema cover lying around, the average sailor does not.

This is largely because it can be hard to get your hands on... Yet, at upffront.com we recognise that Dyneema cover (i.e. the cover of a rope without a core!) is extremely useful for a variety of purposes on your boat's running rigging, and a perfect addition to your onboard ‘tool kit’.

Dyneema cover benefits

Dyneema cover has a multitude of benefits. It’s:

• Extremely abrasion resistant
• Low friction (slippy)
• Lightweight
• Extremely UV resistant

Spliced as an extra cover on ropes, these properties make it useful for a host of applications onboard, for example:

• Chafe protection on lines – Protect rope eyes, rope splices and other exposed parts of ropes
• Making your own loops and strops – Use a cover to hold together multiple rounds of 1.5mm Dyneema®
• Increasing line durability – E.g. around lead blocks, sheet exits, and halyard exits
• Reducing diameter of the original cover – Original covers on ropes are not generally manufactured from pure Dyneema and, as a result, are often thicker and designed for grip. Instead, Dyneema cover is thinner, sleek and reduces friction on the running section of lines
• Protecting the core from UV damage
• Extending the life of a line – E.g. If the cover of your halyard is chafed and worn but the core remains intact, it is possible to simply strip the damaged cover and re-cover it. If it is just the halyard exit, for example, that has been damaged, it is possible to replace just this part of the cover

The other reason covers are not more commonly used is that there are a large variety available and unless you are a professional rigger, the options and nomenclature can seem complicated.

For example, let’s take the Gottifredi Maffioli dyneema cover range:

Gottifredi Maffioli’s extensive range of dyneema covers are identifiable by a 7-digit code and are available in black or white.

Let’s take for example their code 2x1x48L.

2 - The first digit refers to the number of threads that sit side by side in the braid

1 - The second number refers to the number of twisted yarns that each of the threads is comprised of

- So, for this example, the Dyneema cover is comprised of 2 threads side by side, with each thread composed of 1 twisted yarn

- The larger the number of threads and yarns, the more heavy-duty the Dyneema cover is and the greater the abrasion resistance they provide

48 – The third number refers to the number of spools/carriers in the braiding machine

- This can be 16, 24, 32 or 48

- More carriers are required to achieve an even coverage on bigger diameter braids

L – The last letter refers to the braiding angle. A braiding angle can either be:

L – A longer braiding angle. Yarns are aligned more longitudinally than transversely, and the cover is therefore able to cover a bigger range of core diameters

M – A shorter braiding angle suitable for a smaller range of core diameters

3x3x32 XL vs. 2x3x32 XL Comparison: 3 threads vs. 2 threads. All threads have 3 yarns and are thus all the same size.

To put things into perspective, we have divided the Gottifredi Maffioli Dyneema cover range into lightweight covers with x1 twisted yarn (e.g. 1x1x32M with a thickness of 0,7mm) versus heavy duty covers with x2 twisted yarns (e.g. 1x2x32M with a thickness of 1,2mm).

We sell a lot of 1x1x32M up to 1x1x48L, which are the most common lightweight Dyneema covers for recovering halyards on boats between 30 and 50ft.

Robline are a very big rope manufacturer with a truly global reach and they have distilled all their knowledge and experience down into a small, simple range of just three Dyneema Cover sizes, for cores from 5 – 15mm.

Confused about Dyneema cover?

Don’t fret! To make choosing the correct Dyneema Cover easier, we have designed a selection guide to help you make the right choice. Still confused? You can always contact us at [email protected] and we would be pleased to guide you!

 If you have any questions about Dyneema cover range, please feel free to email us at [email protected], or click the link below to see our full range:

 DYNEEMA COVER RANGE