Nature and Science
Effects of Wool Fiber Diameter and Bulk on Fabric Bursting
Strength
1. Helal, A, 1. Al-Betar, E.M, 2. El-Gamal, M and Hasan, Ghada, A.
Abstarc :
In the present study the Egyptian Barki wool fibers were graded into five groups: coarse fibers with high bulk (G1),
coarse fibers with low bulk (G2), fine fibers with high bulk (G3), fine fibers with low bulk (G4) and (G5) nongraded fibers (control). Results in the present paper indicate that G3 had the highest bursting strength among all
groups, while G2was the lowest one. Previous result could be explained by the ability of fine fibers to stretch rather
than being break because of crimps in addition to the springy behavior which makes these fibers more able to stretch
under tension rather than cut. For that, bursting strength had a highly significant and positive correlation with bulk (r
= 0.53), resilience (r = 0.67), crimp (r = 0.69) and staple strength (r = 0.77). Bursting strength had a negative
with highly significant correlation with fiber diameter (r = - 0.69) and medullated fiber
percentage (r = - 0.69). Also bursting strength had a negative and highly significant correlation with all
irregularity measurements (r = - 0.68 with thin places, r = - 0.95 with thick places and r = - 0.60 with neps). Bursting
strength also increased with increasing whiteness (r = 0.43), while decreased with increasing yellowness (r = -0.62).
A highly significant positive correlation found between bursting and Tog (r = 0.83).
Key Word :
bulk, fineness, Barki wool, thermoregulation, CLO, fiber diameter, neps and TOG.
Volume 10, Number 7, - 2014 , ISSN 1545-1003