16
S. Raja Balasaraswathi and R. Rathinamoorthy
4.2.2 Tensile Properties of Yarn
The tensile property of the yarn is very significant in the case of microfiber shedding. As the yarn twist, count, and fiber staple length are interrelated in the case of
tensile strength, a lower tensile strength may allow the fiber to break and shed during
continuous limited pressure applications like wearing and washing of textiles. As the
shedding mechanism is connected with several factors, it is very difficult to correlate
with any particular properties as no such studies exist. However, the tensile strength
of fiber and yarn is important for fiber fracture and flex fatigue. During laundry, at
the wet condition, the tensile strength of the cellulose-based yarns are noted poor
whereas, the synthetics like polyester showed comparatively good strength.
4.2.3 Hairiness and Evenness
While determining the surface properties of the textiles, yarn hairiness is an unavoidable parameter. Hairiness is the protrusion of fibers from the surface structure [41].
The hairiness and evenness of the materials have shown an impact on the shedding.
The hairiness and evenness of yarn interdependently affect the shedding. Less hairiness and more evenness can reduce shedding [23]. The statistical analysis done by
the other researcher showed a significant level of increase in the fiber shedding in
the case of fabrics having hairiness of 4 mm and longer [41]. The comparison of
shedding of polyester woven, polyester knit, and polypropylene woven, showed a
reduced shedding in the case of the knit structure where there is no hairiness. But
while comparing the other two fabrics, the hairiness level is the same yet their degree
of shedding varied. Hence it has to be noted that hairiness can be one of the factors
and not the individual factor that determines the shedding [45]. The increased yarn
hairiness can have benefits of improved softness and thermal insulation whereas
when comes to microfiber shedding, the increase in the hairiness leads to increased
shedding [41].
4.2.4 Yarn Count and Twist
Yarn count indicates the linear density of the yarn [46]. Whenever the yarn count gets
increased, the number of fibers per unit cross-section will increase. This leads to more
microfiber shedding as more fibers are there in the yarn structure [29]. Francesca et al.
have reported that the fabrics made of yarns with a higher twist shed lesser fibers
than the fabrics made of yarns with a low twist or no twist [44]. When the yarn gets
more twisted, it will get a tighter structure and this can reduce the shedding [47].
From the available research data, it can be noted that the higher tensile strength of
the yarn reduces the microfiber shedding as it required more force to break the fiber
from its surface. Similarly, fabrics with low hairiness and high evenness shed fewer
fibers during laundry. The effect of the twist was also noted significant as loose yarn
tends to release more fiber, a higher twist factor is preferred for lower microfiber
shedding.
S. Raja Balasaraswathi and R. Rathinamoorthy
4.2.2 Tensile Properties of Yarn
The tensile property of the yarn is very significant in the case of microfiber shedding. As the yarn twist, count, and fiber staple length are interrelated in the case of
tensile strength, a lower tensile strength may allow the fiber to break and shed during
continuous limited pressure applications like wearing and washing of textiles. As the
shedding mechanism is connected with several factors, it is very difficult to correlate
with any particular properties as no such studies exist. However, the tensile strength
of fiber and yarn is important for fiber fracture and flex fatigue. During laundry, at
the wet condition, the tensile strength of the cellulose-based yarns are noted poor
whereas, the synthetics like polyester showed comparatively good strength.
4.2.3 Hairiness and Evenness
While determining the surface properties of the textiles, yarn hairiness is an unavoidable parameter. Hairiness is the protrusion of fibers from the surface structure [41].
The hairiness and evenness of the materials have shown an impact on the shedding.
The hairiness and evenness of yarn interdependently affect the shedding. Less hairiness and more evenness can reduce shedding [23]. The statistical analysis done by
the other researcher showed a significant level of increase in the fiber shedding in
the case of fabrics having hairiness of 4 mm and longer [41]. The comparison of
shedding of polyester woven, polyester knit, and polypropylene woven, showed a
reduced shedding in the case of the knit structure where there is no hairiness. But
while comparing the other two fabrics, the hairiness level is the same yet their degree
of shedding varied. Hence it has to be noted that hairiness can be one of the factors
and not the individual factor that determines the shedding [45]. The increased yarn
hairiness can have benefits of improved softness and thermal insulation whereas
when comes to microfiber shedding, the increase in the hairiness leads to increased
shedding [41].
4.2.4 Yarn Count and Twist
Yarn count indicates the linear density of the yarn [46]. Whenever the yarn count gets
increased, the number of fibers per unit cross-section will increase. This leads to more
microfiber shedding as more fibers are there in the yarn structure [29]. Francesca et al.
have reported that the fabrics made of yarns with a higher twist shed lesser fibers
than the fabrics made of yarns with a low twist or no twist [44]. When the yarn gets
more twisted, it will get a tighter structure and this can reduce the shedding [47].
From the available research data, it can be noted that the higher tensile strength of
the yarn reduces the microfiber shedding as it required more force to break the fiber
from its surface. Similarly, fabrics with low hairiness and high evenness shed fewer
fibers during laundry. The effect of the twist was also noted significant as loose yarn
tends to release more fiber, a higher twist factor is preferred for lower microfiber
shedding.