- Para-phenylene terephthalamide is a low stretch, high strength fiber.
- Good resistance to creep and high temperatures.
- Kevlar, Technora and Twaron
- Good resistance to creep and high temperatures
- UV and abrasion resistance are poor, which means that the rope core will need a cover such as polyester.
- Aramids have a poor resistance to knots and bending requiring large sheaves on pulleys.
- High Modulus Polyethylene is a low stretch high strength fiber.
- Dyneema and Spectra.
- Lighter than Aramids
- Doesn’t suffer from the same degree of strength loss when used around smaller diameter sheave ratios.
- Vectran or Aromatic Liquid Crystal Polyester
- High strength low stretch material.
- Vectran has very low creep and a higher tenacity than Aramids
- Very resistant to heat.
- PBO poly (p-phenylene-2, 6-benzobisoxazole)
- Marketed under the trade name Zylon. This material is relatively new to the market.
- PBO is one of the strongest materials currently available for rope making.
- Very low stretch and exceptional resistance to high temperatures.
- Needs to be protected from UV and abrasion.
- Excellent resistance to UV and abrasion
- Unaffected by water
- Polyester is the material used in protective cover braids and also in ropes made of pure polyester ropes such as polyester double braids and 3 strand.
- This material when dry is slightly stronger than Polyester but is slightly weakened when wet.
- Nylon has good UV and abrasion resistance. The primary advantage of nylon over other materials is its 30% stretch to break. Ideal in applications where energy absorption is a needed such as mooring, docking, or anchoring.
- Very light material which floats in water.
- Low resistance to UV and abrasion.
- Polypropylene has a good resistance to a large range of chemicals.
Grades of Dyneema
- Launched in 2013, this is the latest from DSM Dyneema.
- SK99 has 20% strength advantage over SK78 and crucially retains the same elongation and creep characteristics as SK78 thus outperforming SK90 on every level.
- SK99 has an unmatched strength to weight ratio and has carved a niche for itself as the ultimate performance core material.
- This is currently the standard grade used by manufacturers. It has the same strength but offers significantly improved creep and elongation characteristics.
- The standard for many years, but is being used less in pleasure marine because of the improved grades now available.
- This grade offered 10-15 % more strength over SK 75/78 but has the same creep and elongation as SK75. Launched in 2009.
- Has a lower grip characteristic than SK78.
- Has almost zero creep.
- Primarily used for static load applications. (Standing Rigging)