Which fibre for which use?

A chafe sleeve protects rope where there is exposure to chafing (cleats, sheaves, winch, etc.)). The role of a chafe sleeve is to increase the ropeโ€™s lifespan: when it is worn, it is changed rather than having to replace the rope. This practical brief will help you to choose the right chafe sleeve (Dyneemaยฎ, Technoraยฎ, polyester, mixed), depending on its use.

Technoraยฎ chafe sleeve: for rope exposed to overheating

Dossier surgaines : la surgaine Technora

A chafe sleeve made of Technoraยฎ is manufactured with Aramid fibres appreciated for their excellent resistance to overheating (up to 450 ยฐC). Aramids also have a high friction coefficient, which means that they are not very slippery: the fibres โ€œgripโ€ the surface that they rub against. Resistance to overheating and Technoraยฎโ€™s high friction, make it ideal for winch chafe sleeves on large sailing yachts. An abrupt release of the genoa sheet causes overheating of the rope, which could melt! The solid structure of the Technora ยฎ chafe sleeve, with its high friction coefficient, provides another advantage: the rope does not slip around the winch. This is also why clutches and cleat chafe sleeves are made of Technoraยฎ. However, Aramids have a nasty flaw. Their lifespan is limited to two years because of their low UV resistance (the fibres eventually form bobbles).

Resist to over-heating (brutal easing on winch)

Good holding in clutches

Limited lifespan (UV sensitive)

One should avoid using Kevlarยฎ (Aramid fibres) for chafe sleeves: Because of its yellow colour, it is even more UV sensitive than Technoraยฎ, which is black.

Dyneema chafe sleeveยฎ: ideal for masthead sheaves

Dossier surgaines : la surgaine Dyneema

A common belief is that Aramids (Technoraยฎ and Kevlarยฎ) are the most abrasion resistant fibresโ€ฆ But it is wrong! The fibre that is at the top of the charts in abrasion resistance is polyethylene high modulus, marketed under the brand name Dyneemaยฎ (or Spectraยฎ). The latter also has a very long lifespan, unlike Technoraยฎ. A chafe sleeve made of Dyneemaยฎ resists very well against salt and UV aggressions. Unlike Aramid fibres, high modulus polyethylene has a very low friction coefficient: it is an extremely slippery fibre. Besides, it withstands low bending radius very well. Dyneemaยฎ chafe sleeves are perfectly suitable for protecting halyards, at the masthead, around the sheaves and the guide (through which the rope passes). They provide both minimal friction and very good resistance to wear (UV, chafing). Do not hesitate to put them on the foresail sheets, around the shrouds, or even on the cunningham, where the rope passes through the mainsail tack ring. However, Dyneemaยฎ chafe sleeves must not be used on clutches and cleats, under any circumstances: it is much too slippery!

Abrasion resistance and lifespan

Chafe sleeve for halyard:minimal friction in sheaves

Does not hold in clutches

As well as being aesthetically pleasing, the Dyneemaยฎ chafe sleeveโ€™s coating increases its lifespan (protection against salt and UVs).

Polyester chafe sleeve: multi-purpose but less efficient

Dossier surgaines : la surgaine Polyester

The chafe sleeve made of polyester is a consumer product that can be found in all ship-chandlers that are fully stocked. Polyesterโ€™s success is not only due to its low cost. It is a durable fibre with low sensitivity to UVs and to abrasion. A polyester chafe sleeve wears out much less quickly than a Technoraยฎ one. Additionally, it is three times less expensive than a Dyneemaยฎ one. The polyester chafe sleeve is not the most efficient solution but it is an all purpose product that can be suitable for the protection of masthead ropes (sheaves and guides), as well as for clutches and cleats. Therefore, it is an efficient solution for those who wish to control their budget, while increasing their ropesโ€™ longevity.

UV resistant fibre

Multi-purpose chafe sleeve

Cost-saving but less efficient

Whatever type of chafe sleeve is used, it must be correctly fitted: if it comes off the rope and gets stuck in the sheave or the cleat, here comes trouble!

Mixed polyester-Technoraยฎ chafe sleeve: A must in the clutch range

Dossier surgaines : la surgaine mixte Technora - Polyester

The mixed polyester-Technoraยฎ chafe sleeve is the best compromise for clutch chafe sleeves. The high friction coefficient of Technoraยฎ ensures excellent grip in clutches and cleats. Technoraยฎ also provides very good abrasion resistance. Polyester, on the other hand, compensates for Aramid fibresโ€™ weaknesses. A mixed polyester-Technoraยฎ chafe sleeve is, indeed, more supple than a 100% Technoraยฎ chafe sleeve. When it ages, it becomes stiff and unpleasant to touch; Aramid fibres harden when exposed to UVs. Moreover, polyester significantly increases the lifespan of the chafe sleeve, as its UV resistance is much higher than that of Technoraยฎ. Thus, a mixed polyester-Technoraยฎ cover combines longevity, suppleness of the rope, abrasion resistance and good holding power in clutches and cleats.

Lifespan: UV resistance

Abrasion resistance and good grip in clutches

Rope suppleness

Whatever it is made of, a chafe sleeve increases the ropeโ€™s diameter significantly. Remember to check whether your fittings are suitable !

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