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
