According to the
strength, elasticity, durability and operation to choose the most suitable
materials. That large ships use wire ropes, and in the small and medium-sized
ships to give priority to the use of synthetic fiber rope. All the mooring line
as far as possible to choose the same size and material .Multiple strands
mooring rope used to tie ships. Requires the tensile strength, impact
resistance, abrasion resistance, flexibility, light. With 3 strands rope, 6
strands rope, 8 strands rope, 12 strands rope, double layer multi ply braided
rope
In the past
commonly used steel wire rope, hemp or cotton rope; after the emergence of
synthetic fiber, has been mostly used for nylon, polypropylene, polyvinyl
alcohol, polyester and manufacture. Synthetic fiber rope in light specific
gravity, high strength, impact resistance and good abrasion resistance outside,
corrosion resistance, mildew resistance, resistance to insects and other
advantages. Chemical fiber cable according to the processing structure is
divided into 3 stands, 8 stands , twisted rope and multi strands plaited rope .
3 stands rope diameter is 4 ~ 50 mm, 8 stands of general cable diameter is 35 ~
120 mm. According to the needs of special purpose, it can be incorporated into
the metal materials in the cable core.
Nylon rope :
High strength,
light weight, soft, high elastic, long-term use is not easy to fatigue. The
characteristics of strong wear resistance, chemical resistance, oil chemical
reaction does not occur. Have water absorbent, weather resistant
ability is poor, too long exposure performance will decline. After the friction
is easy to produce electrostatic and adsorption of dust
Polyester rope:
High strength,
high temperature resistance and the resistance to climate, suitable for high
load continuous friction, Acid resistance, alkali resistance and oil resistance,
so used for towing. Water absorption rate is only 0.4%,.
Polypropylene rope:
Soft, low water
absorption rate, High oil and chemical corrosion resistance, Not easy to absorb
dust, dirt. Friction resistance, not easy to slide in the roller and bollard,
in the case of repeated curl, has little influence on the strength. Convenient
operation, small elongation, small rebound. Poor heat resistance, temperature:
140 degrees - -30.The polypropylene rope breaking force for nylon rope breaking
force 51%-66% is a large ship equipped with cable
Polyethylene rope:
Low temperature
resistance, chemical resistance, chemical corrosion resistance,. No absorb
water that can floating on the water, keeping the various properties in water,
suitable for water application. Poor high temperature resistance .still has
enough strength at low temperature, soft and easy to operate
Vigny long rope:
Wear resistant,
low temperature resistant, salt and oil resistant. Ultraviolet resistance,
aging is not easy. High temperature, burning 230 degrees. Poor elasticity, when
high temperature or elongated deformation.. High water absorbent
Dyneema rope
light weight,
floating in the water, light 87.5%. the same diameter of the steel wire rope the
world's highest strength, 1.5 times higher he steel wire rope of the same
diameter. -excellent durability, water resistance, chemical resistance,
ultraviolet radiation and temperature is repeated, using the constant quality. operation
convenient, fast, safe to use, the operation is a short period of time, such as
the military in particular situations, maneuver rapid capability. Super low
temperature resistance (liquid helium temperature 269 DEG C, it is still able
to maintain useful resistance to impact, toughness and ductility and fracture)Low
density, light weight (less dense than water, <1 g/cm3). Water absorption is
very low. Physiologically inert (most level can be used in contact with food)
with FDA certification. Moderate mechanical strength, rigidity, good creep
resistance and excellent machining performance. Superior corrosion resistance,
resistance to chemicals
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