Spleitex is a rope that at first glance appears technically unremarkable: a plain 8 mm twisted cord.
What makes it distinctive is its appearance. At first sight, it is virtually indistinguishable from natural hemp rope.
During our breaking strength test, however, it exhibited unusual behaviour that is rarely seen — an inconsistent break pattern with a large spread between measurements.
What does this rope actually do under full load?
In our test, the 8 mm spleitex broke at an average of 6.76 kN (689 kg), measured over 5 repetitions on a universal testing machine. That is the hard number.
Below, we explain what that means, how consistent this result is, and when this rope should — and should not — be used.
Summary
The 8 mm spleitex achieves an average of 6.76 kN (689 kg).
The spread is large: lowest measurement 6.17 kN, highest 7.16 kN. The break pattern was irregular — in almost every test, one strand remained intact after the initial break. Suitable for light, non-critical applications.
Not suitable for safety-critical loading or sustained dynamic use.
What type of rope is this?
Spleitex is a twisted rope in a classic 3-strand construction, with a diameter of 8.0 mm.
The term "spleitex" generally refers to a specific type of spun polypropylene cord that, due to its structure, is virtually indistinguishable from hemp rope.
The 3-strand twisted construction is the most traditional rope construction. The twisted construction makes the rope easy to splice and work with, but the efficiency factor is lower than in braided constructions: typically 75–85% of the theoretical fibre strength. This rope is typically used in:
- Decorative applications
- Light suspension and binding applications
- Craft, styling and finishing
- Stage sets and events
Test method
The test was carried out on a universal testing machine with rope-specific clamps, suitable for measuring rope without splice connections. The tensile force was applied at a test speed of 20 mm/s. 5 repetitions were performed on the same rope and the same batch. No pre-tension was applied before measurement. Breaking strength was recorded as the maximum force at first failure of the rope.
The test method follows the principles of ISO 2307 (fibre ropes — determination of mechanical properties), adapted to the practical test setup used by Prorope. All values were measured in dry condition unless otherwise stated.
Test results
The average breaking strength over 5 tests is 6.76 kN (689 kg).
The highest measured value was 7.16 kN; the lowest measured value was 6.17 kN. The difference between the lowest and highest measurement is nearly 1.0 kN (approx. 100 kg) — a large spread for a rope of this size.
The break pattern was notable.
In the first test, the rope failed completely in a single break. In the remaining four tests, one strand remained intact after the initial break: once in three stages, the rest in two stages.
This varying behaviour — from complete failure to partial failure — indicates uneven load distribution between the three strands. In a well-balanced twisted rope, the strands would be expected to fail more simultaneously. The large spread confirms that the load is not distributed consistently across the construction.
Comparison with other ropes of similar diameter
To put the measured value in context, the 8 mm spleitex is compared with other ropes previously tested at similar diameters:
- Spleitex 8 mm (this rope): 6.76 kN
- polypropylene: 10.57 kN
- polyester sheath-core with twisted core (all loose fibres): 10.17 kN
- polyester sheath-core — 32-strand braided: 9.38 kN
The spleitex scores significantly lower than all comparable alternatives.
Polypropylene rope achieves 56% more breaking strength at the same diameter. Even the lowest-strength polyester variant in the comparison (9.38 kN) is still 39% stronger.
This is not unexpected for a twisted construction with a lower efficiency factor, but the difference is large enough to directly influence application choice.
When is this rope best suited?
The 8 mm spleitex is best suited for applications where appearance, workability or tradition matter more than absolute breaking strength. Examples include:
- Decorative use: display, styling, interior decoration, nautical aesthetics
- Light binding applications without safety loading
- Craft and theatre: easy to work, splice, and dye
- Short-term suspension of light objects well below 689 kg — with a safety factor of 5:1, this gives a WLL of approximately 138 kg maximum
The primary application remains replacing natural hemp rope in outdoor environments.
For applications where reliability and consistent breaking strength are essential, this rope is less suitable — see also the limitations below.
Limitations
The large spread in test results — from 6.17 kN to 7.16 kN — indicates that the breaking strength of this rope is difficult to predict. In safety-critical applications, predictability is at least as important as average strength.
- No certified MBL: in general, no official MBL is issued for this rope. The measured 6.76 kN is an average from our test, not a guaranteed minimum value.
- Uneven break behaviour: the fact that only one of the five tests resulted in a complete, simultaneous failure indicates uneven load distribution. This makes the rope less suitable for loads where all three strands must contribute equally.
- Not suitable for dynamic loading: twisted constructions have lower fatigue resistance than braided alternatives under repeated loading.
- Not suitable for prolonged UV exposure without knowledge of the exact fibre composition — the UV resistance of spleitex has not been verified in our test.
- Not for use in life-safety applications: with an average breaking strength of 6.76 kN and a recommended safety factor of 10:1 for life loads, the maximum WLL is only approximately 68 kg — and only if the MBL is guaranteed, which is not the case here.
Alternatives
If the breaking strength or consistency of the spleitex does not meet the requirements of your application, these are better options:
- Braided nylon (polyamide) (8 mm, price per metre, White) — higher elongation (20–35% at break), excellent shock absorption, suitable for dynamic loading such as anchor or tow lines
Conclusion
The 8 mm spleitex is a twisted rope with an average breaking strength of 6.76 kN (689 kg), but with a notably irregular break pattern and a large spread between measurements.
It is best suited for decorative and light non-critical applications where workability and appearance matter, not for situations requiring consistent, predictable strength.
This test was carried out by Otto Tromm, who now fully understands why this rope is called "spleitex" — because it neatly spliced itself apart in stages during the test, as if it wanted to draw out the suspense.
The test data were collected by Prorope. This text was generated on the basis of that data using AI and checked for factual accuracy. Read how we test and publish →