What is waterproof yarn? How to make yarn waterproof?

Waterproof yarn, are you curious, can yarn also block water? Indeed. Water-blocking yarn is mainly used for the sheathing protection of cables and optical cables. What is waterproof yarn? It is a kind of yarn with strong absorption capacity. Which plays a role in preventing moisture from entering the inner part of the cable on the outer wall of communication cable or optical fiber cable. The emergence of water-blocking yarn water-blocking method overcomes the shortcomings of the traditional optical cable water-blocking measure – grease water-blocking. So, how to make yarn waterproof ?

Water-blocking yarn is mainly composed of two parts: one is the reinforcement rib composed of nylon or polyester, etc., which can make the yarn have good tensile strength and elongation; the other is the expansion fiber or expansion powder containing polyacrylate.

How to make yarn waterproof?

The water-blocking principle of waterproof yarn is that the main body of water-blocking yarn fiber can expand rapidly to form a large gel-like substance when it encounters water. The gel-like substance has a strong water-retaining capacity and can effectively prevent the growth of water trees. It prevents water from continuing to penetrate and diffuse, thereby achieving the purpose of water blocking.

Feature of Waterproof Yarn

The cables of electrical and optical cables are generally laid underground in humid areas. Once the cables are damaged, water will enter the cable from the damaged point. For optical cables, if water is frozen in the cable, it will produce excessive pressure on the optical components. This has a great impact on the transmission of light.

Therefore, the water-blocking performance of optical cables is an important assessment indicator.

In order to ensure that the optical cable can work normally and withstand the test of various environmental conditions, the use of water-blocking yarn in the optical cable must have the following characteristics:

1. Smooth appearance, uniform thickness, and soft texture;
2. Can meet the tension requirements when cabling, and have a certain mechanical strength;
3. Fast expansion speed, good chemical stability and high strength when absorbing water to form gel;
4. Does not contain any corrosive components, has good chemical stability.And is resistant to bacteria and mold;
5. Good thermal stability and weather resistance, suitable for various subsequent processing and production and various use environments;
6. Good compatibility with other materials in the optical cable.

Summary

The application of water-blocking yarn in optical cables realizes dry water blocking of optical cables. Compared with the past use of grease water blocking, it has many advantages. Such as reduced optical cable weight, convenient optical cable connection, construction, and maintenance. It not only reduces the cost of water blocking of optical cables, but also truly realizes the environmentally friendly production of optical cables.