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Double-component composite elastic fiber

An elastic fiber, two-component technology, applied in the direction of fiber processing, filament/thread forming, conjugated synthetic polymer artificial filament, etc., can solve the problem that the number of spring crimps is small, the elastic performance cannot fully meet the requirements, Problems such as large crimping radius, to achieve the effect of small crimping radius, good elasticity, and cost reduction

Active Publication Date: 2015-02-11
TORAY FIBERS NANTONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the side-by-side compounding of two polymers with different shrinkage properties, the side-by-side composite fibers of this elliptical cross-sectional shape can produce better elastic elongation and elastic recovery, but it can be seen from the fiber cross-section that the composite two The distance between the centers of gravity of this polymer is larger than that of ordinary circular shapes, which also leads to the fact that the number of spring-like crimps produced per unit length of the juxtaposed composite fibers with an elliptical cross-sectional shape is relatively small after stretching and heat treatment. The shrinkage radius is too large, and the elastic performance cannot fully meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The two-component elastic fiber was prepared by melting method. The PBT with an intrinsic viscosity of 1.31dl / g and the poly-PET with an intrinsic viscosity of 0.51dl / g were selected for composite spinning, and their intrinsic viscosity difference was 0.80dl / g. Dry them separately so that the water content is less than 100ppm, and put the dried PBT and PET into No. 1 / No. 2 spinning box at a weight ratio of 50:50. Set the spinning temperature, the screw temperature of No. 1 extruder is 265°C; the screw temperature of No. 2 spinning machine is 285°C; the temperature of No. 1 spinning box is 260°C; the temperature of No. 2 spinning box is 280°C. Use side-by-side spinnerets to spin out, adopt a two-step spinning process, and wind up under the condition of 2700m / min at a speed to obtain pre-oriented filaments with good spinnability; and prepare the pre-oriented filaments The wire is stretched and processed on the drafting machine, the processing speed is 700m / min, the temper...

Embodiment 2

[0053] Except that the composite ratio of PBT and PET was changed to 60:40, other spinning processes and conditions were the same as in Example 1. The specific performance parameter data are shown in Table 1.

Embodiment 3

[0055] Except that the composite ratio of PBT and PET was changed to 70:30, other spinning processes and conditions were the same as in Example 1. The specific performance parameter data are shown in Table 1.

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Abstract

The invention discloses a double-component composite elastic fiber. The fiber is an extended filament which is formed by parallel composite spinning of polybutylene terephthalate and polyethylene glycol terephthalate according to a weight ratio of (70: 30)-(30:70), crimp number of the fiber is 55-75 / 25mm, and the crimp radius is below 1.0mm. After thermal treatment, the elastic elongation ratio of the fiber is 80%-120%, and the elastic recovery ratio of the fiber is above 92%.

Description

technical field [0001] The invention relates to a two-component composite elastic fiber, in particular to a two-component elastic extension yarn containing polybutylene terephthalate. Background technique [0002] Composite fiber is a new type of chemical fiber developed in the 1960s in the world. The composite fiber of two components is also called bicomponent fiber or conjugate fiber. It is to transport two kinds of fiber-forming high polymer melts with different components, proportions, viscosities, etc. to the same spinning assembly, meet at the appropriate part of the assembly, and spray out from the same spinneret hole to form a fiber. [0003] Side-by-side composite fiber is the earliest developed composite fiber variety with large output and relatively important. When people first researched and developed composite fiber, they mainly wanted to simulate the crimp elasticity of natural wool with chemical fiber. As people continue to deepen the microstructure, it is fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G1/18D01D5/32D01F8/14
CPCD01D5/32D01F8/14D02G1/18
Inventor 曹海兵藤森稔
Owner TORAY FIBERS NANTONG CO LTD
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