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A kind of preparation method of stretch-resistant spandex fiber for heavy crepe

A spandex fiber and stretch-resistant technology, which is applied in the fields of fiber chemical characteristics, rayon manufacturing, textiles and papermaking, etc., can solve the problems that the thermal stability and mechanical properties of spandex fibers cannot meet the needs, and achieve good spinning effect and surface High softness and good mechanical properties

Active Publication Date: 2021-04-16
ANHUI HONGXIANG SILK WEAVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal stability and mechanical properties of spandex fiber can not meet the demand at present, and it needs to be solved urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method for stretch-resistant spandex fiber for heavy crepe, comprising the steps of:

[0019] S1. Add 12 kg of dispersant and 120 kg of water to 60 kg of pretreated sodium alginate and stir evenly at a stirring temperature of 80°C, then add 140 kg of polyurethane emulsion for blending, stir and disperse, then let stand, vacuum defoaming to obtain a premix;

[0020] The pretreatment sodium alginate is prepared by the following process: Stir 16kg of sodium alginate and 50kg of 1.5mol / L sodium hydroxide solution for 30min at a stirring speed of 650r / min at a stirring temperature of 65°C, add 8kg of N,N-dimethyl Base (hexadecyl) amine continued to stir for 10 min, centrifuged, washed, added 100 kg of hydrochloric acid with a concentration of 0.4 mol / L and stirred for 8 min, filtered, and dried to obtain pretreated sodium alginate;

[0021] S2. After the premix is ​​metered by a metering pump, it enters a coagulation bath with a temperature of 2°C through a can...

Embodiment 2

[0023] A preparation method for stretch-resistant spandex fiber for heavy crepe, comprising the steps of:

[0024] S1. Add 8 kg of dispersant and 140 kg of water to 80 kg of pretreated sodium alginate and stir evenly at a stirring temperature of 70°C, then add 160 kg of polyurethane emulsion for blending, stir and disperse, then let stand, vacuum defoaming to obtain a premix;

[0025] The pretreatment sodium alginate is prepared by the following process: Stir 10kg of sodium alginate and 70kg of 1mol / L sodium hydroxide solution for 50min at a stirring speed of 550r / min at a stirring temperature of 75°C, add 4kg of N,N-dimethyl (Hexadecyl) amine continued to stir for 20 minutes, centrifuged, washed, added 60 kg of hydrochloric acid with a concentration of 0.8mol / L and stirred for 4 minutes, filtered, and dried to obtain pretreated sodium alginate;

[0026] S2. After the premix is ​​metered by a metering pump, it enters a coagulation bath with a temperature of 6°C through a candl...

Embodiment 3

[0028] A preparation method for stretch-resistant spandex fiber for heavy crepe, comprising the steps of:

[0029] S1. Add 11 kg of dispersant and 125 kg of water to 65 kg of pretreated sodium alginate and stir evenly at a stirring temperature of 77°C, then add 145 kg of polyurethane emulsion for blending, stir and disperse, then let stand, vacuum defoaming to obtain a premix;

[0030] The pretreatment sodium alginate is prepared by the following process: Stir 14kg sodium alginate and 55kg sodium hydroxide solution with a concentration of 1.4mol / L for 35min at a stirring speed of 620r / min at a stirring temperature of 68°C, add 7kg of N,N-dimethyl Base (hexadecyl) amine continued to stir for 12 minutes, centrifuged, washed, added 90 kg of hydrochloric acid with a concentration of 0.5 mol / L and stirred for 7 minutes, filtered, and dried to obtain pretreated sodium alginate;

[0031] S2. After the premix is ​​metered by a metering pump, it enters a coagulation bath with a tempera...

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PUM

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Abstract

The invention discloses a preparation method of stretch-resistant spandex fiber for heavy crepe, which comprises the following steps: adding a dispersant and water to pretreated sodium alginate and stirring evenly, then adding polyurethane emulsion for blending, stirring and dispersing, and standing still, Vacuum defoaming to obtain the premix; the premix is ​​metered by the metering pump and then enters the coagulation bath through the candle filter and spinneret for spinning, desulfurization, washing, oiling, and drying to obtain stretch-resistant spandex fibers for heavy crepe . The pretreatment sodium alginate is prepared by the following process: Stir the sodium alginate and sodium hydroxide solution, add N,N-dimethyl(hexadecyl)amine and continue stirring, centrifuge, wash, add hydrochloric acid, stir, filter, and dry Obtain pretreated sodium alginate. The method of the invention is simple, and the surface softness of the obtained spandex fiber is extremely high, and the mechanical property is good, and it is not easy to break, and is suitable for high-temperature printing and dyeing, and can be applied to various crepe fabrics.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a method for preparing stretch-resistant spandex fibers for heavy crepe. Background technique [0002] Spandex is the abbreviation of polyurethane fiber. It is an elastic fiber and is widely used to make heavy crepe fabrics. Its silk surface is dense, fine and glossy. The pursuit of sex is also getting higher and higher. But at present, the thermal stability and mechanical properties of spandex fiber can not meet the demand and need to be solved urgently. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a preparation method of stretch-resistant spandex fiber for heavy crepe. The method is simple, low in cost, and environmentally friendly. The obtained spandex fiber has high heat resistance, high elasticity, and high temperature rinsing resistance. Features, high surface softness, good mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F1/10
CPCD01F1/10D01F6/94
Inventor 秦祥宏秦建禾马明彩汪培琳
Owner ANHUI HONGXIANG SILK WEAVING