Blog, Rope Specifications
Dyneema Rope Specifications
Dyneema (HMPE) Rope Specifications
Dyneema (HMPE) rope, made from ultra-high-molecular-weight polyethylene, is one of the strongest and lightest synthetic ropes available. It’s up to 15 times stronger than steel by weight, floats on water, and offers excellent resistance to abrasion, UV degradation, and chemicals.
We supply Dyneema (HMPE) ropes suitable for marine, off-road, recovery, lifting, and high-performance industrial applications.
What is Dyneema (HMPE) Rope?
Dyneema (HMPE) is a high-modulus polyethylene fibre known for its exceptional strength-to-weight ratio. It is commonly used in critical applications where low weight and high strength are essential, such as winching, sailing, and tactical equipment.
Dyneema (HMPE) Rope Sizes, Break Loads & Weight Chart
| Diameter | Length per Reel | Weight (Approx.) | Min. Break Load | Safe Working Load (SWL) |
|---|---|---|---|---|
| 2mm | 100m | 0.30kg | 300kg | 60kg |
| 3mm | 100m | 0.50kg | 550kg | 110kg |
| 4mm | 100m | 0.90kg | 1,000kg | 200kg |
| 6mm | 100m | 1.80kg | 2,100kg | 420kg |
| 8mm | 100m | 2.80kg | 3,800kg | 760kg |
| 10mm | 100m | 4.20kg | 6,000kg | 1,200kg |
| 12mm | 100m | 6.30kg | 8,400kg | 1,680kg |
| 14mm | 100m | 8.20kg | 10,500kg | 2,100kg |
| 16mm | 100m | 11.00kg | 14,000kg | 2,800kg |
Note: Always allow for a safety margin when selecting rope. Splicing can reduce the overall break load by up to 10%.
Key Features of Dyneema (HMPE) Rope
- Exceptional strength-to-weight ratio
- Lightweight and floats on water
- Very low stretch under load
- Highly resistant to UV, abrasion, and most chemicals
- Minimal water absorption
- Working temperature range: –40°C to +70°C
Uses for Dyneema (HMPE) Rope in Marine, Recovery & Rigging
- Marine and sailing – winch lines, tow ropes, anchor lines
- Off-road recovery – safer and lighter than steel wire
- Lifting and rigging – synthetic slings, lifting lines
- Military and defence – field lines and tactical gear
- Rope access and rescue – hauling lines and safety ropes
How to Splice and Handle Dyneema (HMPE) Rope Safely
For best strength retention, always splice rather than knot. Use proper splicing tools or fids. Dyneema’s slick surface means knots can slip or reduce strength significantly.
Need help? We offer custom spliced Dyneema (HMPE) ropes to your requirements.
Storage and Care
- Store in a dry, cool, and shaded location
- Inspect regularly for wear, fraying, or surface damage
- Avoid contact with sharp edges or abrasive surfaces
Dyneema (HMPE) vs Other Ropes
| Rope Type | Strength | Weight | Stretch | UV Resistance |
|---|---|---|---|---|
| Dyneema (HMPE) | Very High | Very Low | Very Low | Excellent |
| Nylon | High | Moderate | High | Moderate |
| Polypropylene | Moderate | Very Low | Moderate | Poor |
Download Dyneema (HMPE) Rope Datasheet
Download PDF – Includes full technical breakdown and usage guidelines.
Frequently Asked Questions
Is Dyneema (HMPE) stronger than steel?
Yes, Dyneema (HMPE) is around 15 times stronger than steel by weight, making it a preferred material for lightweight high-load applications.
Can I use Dyneema (HMPE) for winching?
Absolutely. Dyneema (HMPE) rope is widely used in winching and recovery due to its strength, safety, and ease of handling compared to steel cable.
Does Dyneema (HMPE) stretch under load?
No. Dyneema (HMPE) has very low elongation, making it ideal for uses where stretch must be minimised.
Hi,
Please I would like to know the respective weight in water. Can assist please
Dyneema (UHMWPE – Ultra High Molecular Weight Polyethylene) is lighter than water and therefore floats. Its density is around 0.97 g/cm³, which is slightly less than water’s 1.00 g/cm³.
Key points:
Weight in air: Same as listed dry weight.
Weight in water: Effectively negative buoyancy (it floats), so it will feel almost weightless or slightly buoyant.
No water absorption: Dyneema does not absorb water, so its weight does not increase when wet.