The outer layer of waterproof double-wall adhesive heat-shrinkable tube is made of excellent cross-linked polyolefin and the inner layer is made of hot melt adhesive. The outer layer has the advantages of insulation, anticorrosion, wear-resisting, and the inner layer has the advantages of low melting point, waterproof sealing and mechanical strain buffering. The waterproof double-wall adhesive heat-shrinkable tube is widely used in the connection of electronic equipment, such as waterproof and anti-leakage, sealing and fixation at the branch of electric wire, anti-corrosion protection of metal pipeline, repairing of electric wire and cable, and also can be used in the connection of water pump and diving pump.

Recently, more and more customers have come to inquire about the waterproof double-wall heat-shrinkable tube. Many of these customers are ship manufacturers or ship accessories manufacturers, and some of them have come to our company for field inspection. Through talking with these customers, I got a general understanding of their actual use. For example, a manufacturer of military ship maintenance came to our company to visit and inspect, and they bought heat shrinkable tubes to repair the ship cables. Today, while browsing an article on the problem analysis of the ship manufacturing site, I came across some practical examples of using the water-resistant double-wall heat-shrinkable tube to deal with the actual situation. I would like to share them with you here.

Such a problems existing in the shipbuilding, Marine navigation light, signal lights in lighting system prone to low insulation, author of the article is a very experienced ship manufacturing engineers, he analyzed the appear this kind of circumstance, the main reasons for this quote his analysis in the words of "lamps and lanterns in the lamp holder place owing to the bad cable connection when end processing (such as lead in the final with poor quality of glass tube) in the rain wet; The solution is to insulate the terminals (such as thermoplastic or high quality insulation sleeve) to improve the sealing of the lamp. As a professional manufacturer of heat-shrinkable tube, it is necessary to make a correction for him. The so-called thermoplastic tube or high-quality insulating tube sleeve should be heat-shrinkable tube, Marine heat-shrinkable tube, and there is also a name for inner adhesive heat-shrinkable tube or waterproof double-wall heat-shrinkable tube. This is mainly because the pipe is internally coated with a layer of hot melt adhesive during processing. When the heat-shrinkable tube is heated and shrunk, the hot melt adhesive is also melted together, so there is a water seal effect on the packing culvert and so on.

There is another problem. The author added later that the insulation of lighting lamps such as navigation lights is low. Besides the inadequate construction technology, the product defects of some manufacturers cannot be ignored. For example, the lead wire insulation inside the lamp is not good (the insulation is good when it is suspended, and the outlet hole in the lamp is obviously reduced when it is touched); Or is the lamp terminal box space is small, the connection column and the junction box cover distance is too close causes the insulation to reduce. All of these can be solved through the treatment of the waterproof double-wall heat-shrinkable tube, but it adds a lot of extra work to the installation and debugging unit. Of course, the word "waterproof double wall heat-shrinkable tube" is a good-natured replacement for the author.

Today we see the big picture from the small, through these two very simple small examples: the waterproof double-wall heat-shrinkable tube is mainly used for insulation protection. Of course, this effect can also be achieved with ordinary heat-shrinkable tube. Whether the choice of water-proof double-wall heat-shrinkable tube is mainly due to the requirement of insulation environment, the excellent waterproof sealing effect of hot-melt adhesive in heat-shrinkable tube is perfectly reflected in the Marine equipment.

Finally, I hope some experts in shipbuilding industry would like to comment on this article and discuss the application status and prospect of waterproof double-wall heat-shrinkable tube and other heat-shrinkable materials in shipbuilding industry.