Composite fiber and process for producing the same
A composite fiber, manufacturing method technology, applied in fiber processing, conjugated synthetic polymer rayon, textiles and papermaking, etc., can solve the problem that high stretchability false twisted yarn cannot be obtained, etc.
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Embodiment 1
[0247] [Examples 1 to 4, Comparative Example 1]
[0248] In this example, the effect of the difference in intrinsic viscosity of the two components with respect to the PTT-based conjugate fiber suitable for high-speed false-twisting processing will be described.
[0249] As shown in Table 1, PTT with high intrinsic viscosity containing 0.4 wt% titanium oxide and 0.9 wt% cyclic dimer was used as one of the components, and PTT containing 0.4 wt% titanium oxide and 1.8 wt% cyclic dimer was used as one of the components. The low intrinsic viscosity of the PTT as another component feeds the respective particles such as Figure 4 The composite spinning machine shown produces a yarn roll of 84 dtex / 24 filaments PTT type composite fiber with a winding weight of 6 kg.
[0250] The spinning conditions are as follows:
[0251] (spinning conditions)
[0252] Drying temperature of granules and attained moisture content: 110°C, 15ppm
[0253] Extruder temperature: A-axis is 255°C, B-axi...
Embodiment 5～7、 comparative example 2 and 3
[0279] In this example, the effects of the elongation at break and the elastic elongation of crimps developed in conjugated fibers suitable for false twist processing will be described.
[0280] In the combinations of intrinsic viscosities shown in Example 2, as shown in Table 2, the speed ratio between the first heating roll and the second heating roll, that is, the draw ratio was changed to produce conjugate fibers.
[0281] The physical properties of the resulting conjugated fibers and false-twisted processed yarns are listed in Table 2. As can be clearly seen from Table 2, when the breaking elongation of the composite fiber and the elastic elongation of the crimp appearing fall within the scope of the present invention, it shows good spinning stability and false twist processing stability . On the other hand, as shown in Comparative Examples 2 and 3, when the elongation at break falls outside the range of the present invention, yarn breakage occurs during false twisting, ...
Embodiment 8～11
[0282] [Examples 8-11, Comparative Example 4]
[0283] In this example, the effect of the difference in intrinsic viscosity associated with the PTT-based conjugate fiber applied to a knitted fabric not subjected to false twist processing will be described.
[0284] As shown in Table 3, PTT with high intrinsic viscosity containing 0.4 wt% titanium oxide and 0.9 wt% cyclic dimer was used as one of the components, and PTT containing 0.4 wt% titanium oxide and 2.4 wt% cyclic dimer was used as one of the components. The low intrinsic viscosity PTT of the body is used as another component to feed the respective particles Figure 4 The composite spinning machine shown produces a package of 56 dtex / 24 filament PTT type composite fiber with a package weight of 6 kg. However, in Comparative Example 4, composite spinning was not performed, and spinning was performed using a single component.
[0285] The spinning conditions are as follows:
[0286] (spinning conditions)
[0287] Dryi...
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Abstract
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