We as laymen all understand how essential it is to prevent moisture from coming
in contact with fiber optics. Cable and rope wire manufacturers
understand this all the more and hence execute water wicking tests of the yarn
and thread during the process of manufacturing the same. This helps to analyze
the wicking characteristic of the product so that it is not only time-saving but also
cost-effective in the long run.
What is wicking?
Wicking of cables and rope wires refers to the exposure of the yarn or fibers to
moisture and how it possesses the propensity to absorb liquids into each of the
strands through capillary action.
So, what is the wicking test and how does it help?
When a copper wire is exposed to water, it deteriorates its performance and
functionality. It not only reduces the signal but also emanates light waves along
with producing impurities further resulting in oxidation. Moreover, the continuous
contact with moisture withholds the moisture internally- in the antenna
connector- resulting in incessant subjugation to variable temperature,
atmospheric pressure, and of course humidity.
Cable and rope wire manufacturers perform the wicking test to understand the
significant characteristics of the yarn. This allows them to choose the best suitable
fiber which can be used in manufacturing such rope wires so that they may be
further used for non-wicking applications.
How do we find the best non-wicking thread and yarn for rope wires?
It is through this process of wicking test that helps rope wire manufacturers find the non-wicking thread and yarn which is of superior quality. Furthermore, this
procedure of testing reassures manufacturers of the water-resistant capabilities of
each fiber that will allow the application of an exterior coating. These seams will
bond well and more strongly and prevent the growth of mold and other fungi
(created due to moisture), ensuring further strength and durability of the structure.
The Test Process
The non-wicking test involves hanging the subject yarn into a solution of dye
while keeping a record of the time of the capillary action. However, it must be
ensured that the sample to be tested is devoid of dirt and knots. Therefore, the
ones that are pre-shrunk, natural, white in colour, or evenly dyed will provide the
most accurate results.
Post this step, lead weights must be attached to one end of the samples while the
other end must be attached to a lab stand crossbar. Following that, filter paper
must be attached 3 inches from one end and the yarn must be immersed into the
beaker containing the solution of Methylene blue water till the time the filter
paper is about 1 inch above the beaker.
Here, the time is recorded and keeps a regular check from time to time, further
noting down the time when the bottom end of the filter paper is wetted. If the time
recorded is 6 hours or longer, then the non-wicking characteristic of the fiber is
ensured and hence can be suitably used as the structural strength is proven.
Nonetheless,
No matter how complicated the test may seem, it is a process that is easy, cost-effective, and
does not involve too much labor or assistance while performing it.
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