A kind of elastic fiber and preparation method thereof

A technology of elastic fiber and composite elastic fiber, which is applied in the field of polyester fiber, can solve problems such as unsmooth spinning, spinneret angle, and cracking of two components, and achieve good moisture absorption and perspiration function and large radial orientation , good curly recovery effect

Active Publication Date: 2017-06-16
TAICANG RONGWEN SYNTHETIC FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the spinning process, the two-component high polymer often has a "bend angle" problem at the spinneret due to different viscosities during the spinning process and cannot be spun smoothly, or the two components are cracked due to poor compatibility.
At present, the cross-sectional shapes of the two components of most side-by-side composite fibers on the market are symmetrically distributed, and there is no asymmetric structure of side-by-side composite fibers.

Method used

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  • A kind of elastic fiber and preparation method thereof
  • A kind of elastic fiber and preparation method thereof
  • A kind of elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Take the preparation of PET / PTT side-by-side composite fibers as an example.

[0034] Raw materials and their specific indicators:

[0035] PET chips: intrinsic viscosity 0.65dl / g, melting point 260°C

[0036] PTT chips: intrinsic viscosity 0.80dl / g, melting point 230°C

[0037] Spinning process conditions:

[0038]The PTT slices with an intrinsic viscosity of 0.80dl / g are kept in hot air with a low dew point at 120-140°C for 8-12 hours, and the PET slices are dried; the two slices are sent to a twin-screw extruder for melt extrusion, The melts of the two components use two sets of metering pumps respectively, enter the composite spinning assembly through the melt pipeline, and are sprayed out from the spinneret. figure 1 Side-by-side composite fibers shown. Among them, the use of image 3 The spinneret of the spinneret microholes arranged in the shown arrangement, the cross-sectional shape of the spinneret microholes of the spinneret is a parallel double-connected...

example 2

[0045] Take the preparation of ECDP / PET side-by-side composite fibers as an example.

[0046] Raw materials and their specific indicators:

[0047] ECDP chips: intrinsic viscosity 0.50dl / g, melting point 250°C

[0048] PET chips: intrinsic viscosity 0.65dl / g, melting point 260°C

[0049] Spinning process conditions:

[0050] The ECDP slices with an intrinsic viscosity of 0.50dl / g were kept in hot air with a low dew point at 100°C for 8-15 hours, and the PET slices were dried; the two kinds of slices were sent to the twin-screw extruder for melt extrusion, and the two groups Two sets of metering pumps are respectively used for the melt of two parts, and the melt pipe enters the composite spinning assembly and is sprayed out from the spinneret. figure 2 Side-by-side composite fibers shown. Among them, the use of Figure 4 In the spinneret of the spinneret microholes arranged in the arrangement shown, the cross-sectional shape of the spinneret microholes of the spinneret is...

example 3

[0057] Take the preparation of low-viscosity PET / high-viscosity PET side-by-side composite fibers as an example.

[0058] Raw materials and their specific indicators:

[0059] Low-viscosity PET chips: intrinsic viscosity 0.67dl / g, melting point 245°C

[0060] High-viscosity PET chips: intrinsic viscosity 0.869dl / g, melting point 253°C

[0061] Spinning process conditions:

[0062] The high-viscosity PET chips with an intrinsic viscosity of 0.869dl / g were vacuum-dried at 120°C for 2 hours and 150°C for 4 hours, and the low-viscosity PET chips were dried; the two kinds of chips were sent to the twin-screw extruder for melt extrusion The melt of the two components uses two sets of metering pumps respectively, enters the composite spinning assembly through the melt pipeline, and is sprayed out from the spinneret. After cooling by blowing, it is drawn, heat-treated and wound, and finally obtained figure 2 Side-by-side composite fibers shown. Among them, the use of Figure 4 I...

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Abstract

The invention provides a novel elastic fiber and a preparation method thereof. The novel elastic fiber is a two-component parallel composite fiber. In the cross section of the fiber, two parallel components are both in the shape of a round or an oval, and the two rounds or the two ovals are in tangent connection or in external connection. The novel elastic fiber is obtained by spinning two types of polyester chips, due to the fact that the shrinkage stress of the two fibers is different, different shrinkage effects are generated, the novel elastic fiber is made to have crimp elasticity very similar to that of natural wool, and therefore the novel elastic fiber has good elasticity. Large-scale production of the novel elastic fiber can be achieved, and meanwhile the production cost is lowered.

Description

technical field [0001] The invention relates to the field of polyester fibers, in particular to an elastic fiber and a preparation method thereof. Background technique [0002] Elastane has attracted a lot of attention as DuPont has introduced mass production of Lycra (Lycra) products. Domestically, it is called spandex. Polyurethane elastic fiber has great elongation, strength, aging resistance and other properties that are better than rubber silk, so it is favored by people. However, due to the complex production equipment and process of polyurethane elastic fiber, the high cost of raw materials and processing, serious pollution and other problems limit its application. [0003] In order to further meet the market requirements, and from the aspects of cost reduction and processing convenience, polyester elastic fibers have gained a huge space for development. The two-component composite elastic fibers have low modulus, and the stretchability and Excellent compressibility...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/253D01D5/32D01D5/08
Inventor 王朝生李夏郁铭芳全潇陶景良苏立平肖庆浦雪强金志明朗俊逸
Owner TAICANG RONGWEN SYNTHETIC FIBER
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