C-shaped composite fiber, C-shaped hollow fiber thereof, fabric including same, and method for manufacturing same
Provided are a C-shaped composite fiber, a C-shaped hollow fiber using the same, a fabric including the C-shaped composite fiber and/or the C-shaped hollow fiber, and a manufacturing method of the C-shaped composite fiber, the C-shaped hollow fiber, and/or the fabric, and more particularly, to a C-shaped composite fiber which has excellent strength and elongation together with improved hollowness, so that there is little deformation of the composite fiber and/or the hollow fiber in the manufacturing process thereof, quality degradation of the hollow fiber is minimized in the elution process thereof, a weight reduction process in a fabric state is not required when manufacturing the fabric, and the manufactured fabric has excellent warmth and lightness, a C-shaped hollow fiber using the same, a fabric including the C-shaped composite fiber and/or the C-shaped hollow fiber, and a manufacturing method of the C-shaped composite fiber, the C-shaped hollow fiber, and/or the fabric.
1. A C-shaped hollow fiber consists of one C-shaped cross section comprising a sheath part and one hollow part, and the sheath part including an open slit, wherein the C-shaped hollow fiber satisfies all of the conditions (1) to (4) below.
30
≤
hollowness
(
%
)
≤
65
(
1
)
20
°
≤
slit
angle
(
θ
)
≤
30
°
(
2
)
0.13
<
hollowness
(
%
)
100
×
slit
spacing
(
d
)
<
0.33
(
3
)
1
≤
Eccentric
distance
(
s
)
×
R
2
R
1
<
2.4
(
4
)
where, the slit angle (θ) is an angle between two straight lines each connecting a center of a cross section of the hollow part and two discontinuous points of a sheath part, the slit spacing (d) is a distance (μm) between two discontinuous points of the sheath part, the eccentric distance (s) is a distance (μm) between a center of an entire cross section of the C-shaped hollow fiber including the hollow part and the center of the cross section of the hollow part, R 1 is a diameter (μm) of the entire cross section of the C-shaped hollow fiber including the hollow part, and R 2 is a diameter (μm) of the cross section of the hollow part of the C-shaped hollow fiber.
2. The C-shaped hollow fiber of claim 1 , comprising at least any one component of polyester or polyamide.
3. The C-shaped hollow fiber of claim 1 , further satisfying the condition (5) below.
2.5
<
EXP
(
eccentric
distance
(
s
)
×
slit
spacing
(
d
)
)
4
cos
(
slit
angle
(
θ
)
2
)
<
7.5
.
(
5
)
4. The C-shaped hollow fiber of claim 1 , wherein the C-shaped hollow fiber is any one selected from the group consisting of partially oriented yarn (POY), spin draw yarn (SDY), draw textured yarn (DTY), air textured yarn (ATY), edge crimped yarn, and interlaced yarn (ITY).
5. A fabric including a C-shaped hollow fiber, the fabric comprising the C-shaped hollow fiber of claim 1 .