Dynamica Rope
DYNAMICA
rope is the most
compact rope from Dyneema® fiber in the world. DYNAMICA
rope is coated with a unique coating that ensures shape stability
and increased abrasion resistance for longer
working-life. The rope is heat-set under tension to ensure
maximum strength, durability and uniformity.
The Dyneema® fiber Properties
Physical
Properties of Dyneema® fiber
|
Water and chemicals |
Moisture
regain |
none |
Boiling water shrinkage |
<1% |
Attack by water |
none |
Resistance to acids |
excellent |
Resistance to alkali |
excellent |
Resistance to most
chemicals |
excellent |
Resistance to UV
light |
very
good |
Thermal |
Melting point |
144
- 152o C |
Thermal conductivity (along fiber
axis) |
20
W/mK |
Thermal expansion coefficient |
-12.10-6
per K |
Electrical |
Resistance |
> 1014 Ohm |
Dielectric strength |
900
kV/cm |
Dielectric
constant (22oC,
10 GHz) |
2.25 |
Loss tangent |
2.10-4 |
Mechanical |
Creep (22oC,
20% load) |
1.10-2 %
per day |
Axial tensile strength |
3
GPa |
Axial tensile modulus |
100 GPa |
Axial compressive strength |
0.1 GPa |
Axial compressive modulus |
100 GPa |
Transverse tensile strength |
0.03 GPa |
Transverse modulus |
3 GPa |
|
Strength
Dyneema® fiber is more
than ten times stronger than steel per unit of weight.
This means
that a
rope from Dyneema® fiber has a slightly higher strength
than a steel wire of the same dimension but less
than one tenth of the weight.
Breaking
Strength for SK75
|
Diameter
mm |
Minimum
breaking load in tonnes |
04
mm |
1.3 t |
05
mm |
2.6 t |
06
mm |
4.0
t |
08
mm |
8.1
t |
10
mm |
10.9 t |
12
mm |
17.8 t |
14
mm |
21.7 t |
16
mm |
26.1 t |
18
mm |
35.8 t |
20
mm |
40.8 t |
22
mm |
50.5
t |
24
mm |
60.0
t |
26
mm |
65.0
t |
28
mm |
71.0
t |
30
mm |
77.8 t |
32
mm |
87.2 t |
34
mm |
92.2 t |
36
mm |
106.7 t |
38
mm |
132.0
t |
40
mm |
145.0
t |
42
mm |
155.0
t |
44
mm
|
170.0
t
|
|
*
The above breaking strengths are the breaking strengths
of
ropes. Splices will decrease
the
breaking strengths by app. 10%. All the
tecnical characteristics are strictly indicative. They can
not engage the responsibility of Dynamica
Ropes ApS. We reserve the rights to change them without
prior notice.
Tension fatigue
Dyneema® fiber can sustain a very large number of
peak loads (loads close to the breaking strength). This
gives a long life and a high safe-working load. While steel-wire
can take 6500 loads at 50 % of the maximum breaking load
a DYNAMICA rope can take 10 million cycles at the same
load
level. DYNAMICA rope is therefore an excellent material
for dynamic applications.
Safety
Dyneema® fiber has a very
low elongation (2-3% at break). It stores little energy
and has therefore little
backlash even
at hundreds of tonnes of load. This is a very important
safety feature.
UV-stability
Dyneema® fiber has a better stability to sunlight
than other relevant s. After two years of exposure
80% of the strength is retained.
Resistance to chemical substances
Dyneema® fiber is resistant to
chemical substances and will not be affected by oil acids
or other substances.
Abrasion
Dyneema® fiber has an
excellent abrasion resistance compared with other synthetic
fibres (five times better than polyester).
Special care has to be taken, however, in order to ensure
that it moves over clean non-rusty surfaces etc.Sharp edges
etc. should be avoided.
Bending-bending fatigue
Dyneema® fiber has good bending-bending
properties. However it is recommended to bend over diameters
of at least five times the diameter of the rope.
