Estimation of Quality Indicators of Ecological Thermoplastic Fiber Materials

a thermoplastic by blowing methods, and also provides a method for
calculating the average diameter df
and length lf
of elementary
fibers. According to the presented calculations, the average
elementary fibers' diameter value df
depends on the airflow speed
from the blow head in the fiber formation zone. The greater the air
velocity Vр, the smaller the diameter of the elementary fibers. The
elementary fibers' length lf depends on their diameter df
and
variable angle γ of the blowing head diffuser. The smaller the
diameter of the elementary fibers df
and the larger the variable angle
γ, the smaller the length of the elementary fibers. At γ = 0 degrees,
the fiber is obtained, with an increase in the angle γ, the fiber length
becomes fixed. The average elementary fibers' diameter df
varies
depending on the speed of the airflow flowing from the blowing
head in the fiber formation zone. The greater the air velocity Vр, the
smaller the diameter of the elementary fibers. The discrepancy
between the calculating results of the average fiber diameter with
their real values does not exceed 13%, which, according to the
process complexity, can be considered satisfactory. The elementary
fibers' length lf depends on the elementary fibers' diameter df
and a
variable angle γ. The smaller the diameter of the elementary fibers
df
and the larger the variable angle γ, the smaller the length of the
elementary fibers. At γ = 0 deg, the infinite length fiber is obtained,
and with an increase in the angle γ, the fiber length becomes fixed.