Novel elastic fiber and preparation method thereof

An elastic fiber and composite elastic fiber technology, applied in the field of polyester fiber, can solve the problems of inability to spin smoothly, two components crack, spinneret corners, etc., and achieve controllable elasticity, good moisture absorption and perspiration function, diameter The effect of a large degree of orientation

Active Publication Date: 2014-06-25
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

Method used

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  • Novel elastic fiber and preparation method thereof
  • Novel elastic fiber and preparation method thereof
  • Novel elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example one

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

[0034] Raw materials and specific indicators:

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

[0036] PTT slices: intrinsic viscosity 0.80dl / g, melting point 230℃

[0037] Spinning process conditions:

[0038] The PTT chips with an intrinsic viscosity of 0.80dl / g are kept under low dew point hot air at 120~140℃ for 8~12h, and the PET chips are dried; the two types of chips are respectively sent to the twin-screw extruder for melt extrusion. Two sets of metering pumps are used for the melts of the two components respectively. They enter the composite spinning assembly through the melt pipeline and are ejected from the spinneret. After cooling by blowing, they are drawn, heat-treated and wound, and finally obtained as figure 1 The side-by-side composite fiber shown. Among them, the use of image 3 The spinneret with spinneret micropores in the arrangement shown,...

Example Embodiment

[0044] Example two

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

[0046] Raw materials and specific indicators:

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

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

[0049] Spinning process conditions:

[0050] The ECDP slices with an intrinsic viscosity of 0.50dl / g are kept under low dew point hot air at 100°C for 8-15 hours, and the PET slices are dried; the two slices are fed into the twin-screw extruder for melt extrusion, two groups Two sets of metering pumps are used to separate the melt into the composite spinning assembly through the melt pipeline and ejected from the spinneret. After cooling by blowing, it is drawn, heat-treated and wound, and finally obtained as figure 2 Side-by-side composite fiber shown. Among them, the use of Figure 4 The spinneret with spinneret micropores in the arrangement shown, the cross-sectional shape of the spinneret mi...

Example Embodiment

[0056] Example three

[0057] Take the preparation of low-viscosity PET / high-viscosity PET parallel composite fiber as an example.

[0058] Raw materials and specific indicators:

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

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

[0061] Spinning process conditions:

[0062] The high-viscosity PET chips with an intrinsic viscosity of 0.869dl / g were vacuum dried at 120°C, 2h, and 150°C, 4h, and the low-viscosity PET chips were dried; the two types of chips were sent to the twin-screw extruder for melt extrusion. Two sets of metering pumps are used for the melt of the two components, and the melt pipe enters the composite spinning assembly and is ejected from the spinneret. After cooling by blowing, it is drawn, heat treated and wound, and finally obtained as figure 2 The side-by-side composite fiber shown. Among them, the use of Figure 4 The spinneret with spinneret m...

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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 a novel elastic fiber and a preparation method thereof. Background technique [0002] Elastane gained a lot of attention as DuPont introduced the production of Lycra (Lycra) products on a large scale. 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 compr...

Claims

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Application Information

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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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