Investigation of the effect of yarn twist and flattening on the resistivity of graphite printed yarn
Abstract
The increasing demand for automated medical sector services has led to significant changes in
the requirements for microstrip patch antennas. These antennas must now be highly flexible and
conductive to satisfy the needs of this sector. However, achieving these requirements poses a
challenging problem for researchers. In this study, we investigate the suitability of graphiteprinted yarn as a viable material for flexible microstrip antennas. To achieve this, we examined
the impact of yarn twist and flattening on the resistivity of graphite printed yarn. The yarns were
subjected to a doubling machine, which created two-level twists in both fine and coarse yarns.
The yarns were then flattened under pressure by a roller. Graphite was mechanically exfoliated
using the shear method, and the prepared exfoliated graphite inks were then screen printed on
the arranged strands. The results showed that the low-twist, flattened yarns exhibited good
conductivity and flexibility, making them a viable material for wearable microstrip patch
antennas. The flattened and graphite screen printed yarn fabrics showed promising properties for
this application. Overall, this study provides insights into the use of graphite screen printed yarn
as a material for flexible microstrip antennas, which is important for the development of
wearable medical devices.
Keywords: Graphite ink, printed yarn, yarn twist, yarn flattening, yarn flexibility, yarn
conductivity
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