The aim of this work is to explore a
new method for producing spun yarn on a modified ring spinning system which is called “clusterspun yarn”. Here, we describe the effects of the
clustering of polyester multifilaments on the
internal structure and properties of a composite
yarn. Cotton fibers and polyester multifilaments
were spun into 19 Ne cluster and core-spun yarns
at five different twist levels. These yarns were
then tested to compare their properties, including
tenacity, elongation, and evenness. Surface morphology and structural variations of cluster and
core-spun yarns were studied by scanning electron
microscopy. Microtome and image-processing
methods have been used to study the structure
and packing of fibers in the cross-section of yarns.
The results show that the special structure of a
cluster-spun yarn results in pronounced enhancement in the structural mechanics and yarn properties. The statistical analysis results indicate that
the tenacity and breaking elongation of clusterspun yarn is significantly more than that in corespun yarn. The results show that the twist factor at
about 3.9(αe) gives the optimum properties. In
addition, lower twist is needed to produce quality
yarn in cluster-spun yarns as compared with normal core-spun yarns.