First-class polyethylene ropes float in water and absorb zero moisture. transferred from a wet environment to a wet environment, they remain unchanged. They do not shrink when placed in a humid environment. In the environment, they decompose in a very long time, in other words, they are not biodegradable. It is possible to store them dry or wet. They have a very high resistance to decay. They have moderate resistance to ultraviolet rays. They show good resistance to wear. They show good resistance against acids and alkalis. Their melting temperature is about 140 degrees Celsius.