The nature of polyethylene rope and precautions

  Polyethylene rope is produced by polyethylene, polyethylene is sensitive to environmental stress (chemical and mechanical action), heat aging resistance is poor to the chemical structure of the polymer and processing strip. Next is the introduction of polyethylene rope properties and precautions.

Here is the content list:

• Properties

• Knotting method

Properties

• Polyethylene chemical stability is good, at room temperature can be resistant to dilute nitric acid, dilute sulfuric acid, and any concentration of hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ammonia, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide, and other solutions. However, it is not resistant to corrosion by strong oxidation, such as fuming sulfuric acid, concentrated nitric acid, chromic acid mixed with sulfuric acid. At room temperature the above solvents will have a slow erosive effect on polyethylene, while at 90-100°C concentrated sulfuric acid and concentrated nitric acid will rapidly erode polyethylene, causing its destruction or decomposition. Polyethylene is prone to photo-oxidation, thermal oxidation, ozone decomposition, and degradation under the action of ultraviolet light, and carbon black has an excellent light-shielding effect on polyethylene. Subject to radiation can be cross-linked, chain-breaking, the formation of unsaturated groups, and other reactions.

• Polypropylene marine rope belongs to an alkane inert polymer, has good chemical stability. At room temperature, it is resistant to the corrosion of acid, alkali, and salt aqueous solutions, but it is not resistant to strong oxidizing agents such as fuming sulfuric acid, concentrated nitric acid, and chromic acid. Polyethylene is insoluble in general solvents below 60℃, but long-term contact with aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, etc. will dissolve or crack.

Caution

• The correct use of polyethylene rope in addition to the operation of the sailor and the safety of the ship's mate to improve the guarantee can also extend the service life of the cable. Before use, the first mate (bow) or second mate (transmission) carefully check the integrity of polyethylene rope, there is a part of polyethylene rope excessive wear or a large number of broken head, timely replacement of PP danline fishing line, too late to replace the use of the process of trying not to let this polyethylene rope to bear too much tension, to prevent sudden breakage. 

• Secondly, the person with the range must be familiar with the characteristics of the polyethylene rope they will manipulate, targeted manipulation.

• At the same time, the helmsman and the ship's deputy with the range must wear insurance caps, gloves, insurance shoes, mission clothing. Not allowed to "wear slippers, big shorts, empty-handed to take range" a lot of rowing individual vice and coxswain does not pay attention to their shelter, once there is an accident, PP danline marine line fracture, huge cable fracture strength in the fracture of the PP rope head, the speed is very fast, threatening to their life insurance.

• Also, the head of the water (bow) and the second vice (stern) to hold the moment of churning cable attention means. Reality confirmed: PP twisted rope breakage is mainly because of the continuous attack load. Given this reason, ask the staff who hold the cable car, must hold the skill, try to add to the polyethylene rope attack load, add because of this reason cause the cable to break.

Zhejiang Hailun Rope&Net Co., Ltd reminds you to always pay attention to the above precautions when using polyethylene rope.