Originally, how to distinguish the quality of the fishing boat rope depends on the material and the preparation process, but now there is another important criterion, that is, the elongation rate. Elongation consists of two aspects, one is creep and the other is extended.
First, by looking at the creep phenomenon: generally refers to the static extension of the rope for a long time, that is, the extended behavior of the rope under a relatively constant tension for a long time, generally an irreversible extension behavior. In the case of fishing boats, the common extension is static extension, but if the rope is used for long-term constant weight, creep will occur. The process of creep, it does not occur within a few minutes or hours, but the process of accumulating and dripping stones.
Second, by looking at the extended state: the extended state refers to the dynamic extension, that is, the extension behavior of the rope under the constant tension. Since the winds on the sea are constantly changing, sailors often have to adjust the angle of the sails and winds by controlling the ropes to obtain the best wind direction angle, or change the course by controlling the ropes. These behaviors will unwittingly stretch the ropes. . So after using the normal rope for a while, you will find it getting longer. When the rope is stretched, the diameter is reduced, the pulling force is also reduced, and it is more likely to break suddenly in strong winds, which is potentially dangerous. Therefore, the choice of rope should be low-expansion, low-elasticity, and preferably pre-tensioned.