When you are searching for a fiber or yarn for specific application requirements, there are many options to choose from. Meta-aramid and para-aramid yarns and threads are two popular choices for heat resistance and superior tensile strength.

The critical reason for a wire and cable manufacturer to use a water blocking treatment in their product is to prevent access and dissipation of water and moisture throughout the cable.  When deciding on which treatment to use (i.e. gel, yarn, or powder based) in your cable, it’s important to consider the advantages and disadvantages of each application method. 

Aramid fiber is best known by the trademark name DuPont™ Kevlar® and offers many unique and beneficial properties.  With aramid raw material costs between five and thirty times the cost of nylon or polyester, many manufacturers look for ways to save when aramids are required for their application. What seems on the surface like an easy question is a lot more complicated than you might think.  So, what are some of the factors that contribute to the total cost of industrial aramid yarn or thread?

When yarn used in a wire and cable application prevents access of water and moisture to the critical elements - it is considered to be waterblocking. This feature is also known as water swellable or water absorbent. There are also various treatments that can be applied to a yarn to enhance its waterblocking characteristics. The most important function is that the yarn absorbs or blocks water in a way that stops water from causing damage to your product.

The critical reason for using waterblocking fiber in wire and cable manufacturing is to prevent access and dissipation of water and moisture throughout the cable. In fact, water is the most likely cause of premature failure for cable and electrical equipment. There are two common ways water and moisture finds its way into a cable: