CN108060469B - Preparation method of stretch-proof spandex fiber for heavy crepe - Google Patents
Preparation method of stretch-proof spandex fiber for heavy crepe Download PDFInfo
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- CN108060469B CN108060469B CN201711491031.1A CN201711491031A CN108060469B CN 108060469 B CN108060469 B CN 108060469B CN 201711491031 A CN201711491031 A CN 201711491031A CN 108060469 B CN108060469 B CN 108060469B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/94—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of other polycondensation products
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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Abstract
The invention discloses a preparation method of stretch-proof spandex fiber for heavy crepe, which comprises the following steps: adding a dispersing agent and water into the pretreated sodium alginate, uniformly stirring, adding a polyurethane emulsion, blending, stirring, dispersing, standing, and discharging bubbles in vacuum to obtain a premix; and metering the premix by a metering pump, feeding the premix into a coagulating bath through a candle filter and a spinning nozzle for spinning, desulfurizing, washing with water, oiling, and drying to obtain the stretch-proof spandex fiber for heavy crepe. The pretreated sodium alginate is prepared by the following process: stirring sodium alginate and sodium hydroxide solution, adding N, N-dimethyl (hexadecyl) amine, continuously stirring, centrifuging, washing, adding hydrochloric acid, stirring, filtering, and drying to obtain the pretreated sodium alginate. The method is simple, and the obtained spandex fiber has extremely high surface softness, good mechanical property and difficult fracture, is suitable for high-temperature printing and dyeing, and can be applied to various crepe fabrics.
Description
Technical Field
The invention relates to the technical field of spinning, in particular to a preparation method of stretch-proof spandex fiber for heavy crepe.
Background
Spandex is short for polyurethane fiber, is elastic fiber, is widely used for manufacturing heavy crepe fabric, has dense silk surface and extremely high fineness and luster, and has higher and higher pursuit for fabric comfort along with the improvement of living standard of people. However, the thermal stability and mechanical properties of the spandex fiber at present cannot meet the requirements, and the problem needs to be solved urgently.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a preparation method of stretch-proof spandex fiber for heavy crepe, which is simple, low in cost and environment-friendly, and the obtained spandex fiber has the characteristics of high heat resistance, high elasticity and high-temperature rinsing resistance, has extremely high surface softness and good mechanical property, is not easy to break, is suitable for high-temperature printing and dyeing, and can be applied to various crepe fabrics.
The invention provides a preparation method of stretch-proof spandex fiber for heavy crepe, which comprises the following steps:
s1, adding a dispersing agent and water into the pretreated sodium alginate, uniformly stirring, adding a polyurethane emulsion, blending, stirring, dispersing, standing, and discharging bubbles in vacuum to obtain a premix;
and S2, metering the premix by a metering pump, feeding the premix into a coagulating bath through a candle filter and a spinneret for spinning, desulfurizing, washing with water, oiling, and drying to obtain the stretch-proof spandex fiber for heavy crepe.
Preferably, in S1, the weight ratio of the pretreated sodium alginate to the dispersing agent to the water to the polyurethane emulsion is 60-80: 8-12: 120-140: 140-160.
Preferably, in S1, adding the dispersing agent and water into the pretreated sodium alginate, uniformly stirring at 70-80 ℃, adding the polyurethane emulsion, blending, stirring for dispersing, standing, and discharging bubbles in vacuum to obtain the premix.
Preferably, in S1, the pretreated sodium alginate is prepared by the following process: stirring sodium alginate and sodium hydroxide solution, adding N, N-dimethyl (hexadecyl) amine, continuously stirring, centrifuging, washing, adding hydrochloric acid, stirring, filtering, and drying to obtain the pretreated sodium alginate.
Preferably, in the preparation process of the pretreated sodium alginate of S1, the concentration of the sodium hydroxide solution is 1-1.5mol/L, and the concentration of the hydrochloric acid is 0.4-0.8 mol/L.
Preferably, in the preparation process of the pretreated sodium alginate of S1, the weight ratio of sodium alginate to the sodium hydroxide solution to the N, N-dimethyl (hexadecyl) amine to the hydrochloric acid is 10-16: 50-70: 4-8: 60-100.
Preferably, in S1, the pretreated sodium alginate is prepared by the following process: stirring sodium alginate and sodium hydroxide solution for 30-50min at the stirring speed of 550-650r/min at the stirring temperature of 65-75 ℃, adding N, N-dimethyl (hexadecyl) amine, continuously stirring for 10-20min, centrifuging, washing, adding hydrochloric acid, stirring for 4-8min, filtering, and drying to obtain the pretreated sodium alginate.
Preferably, in S2, metering the premix by a metering pump, feeding the premix into a coagulating bath at the temperature of 2-6 ℃ through a candle filter and a spinneret for spinning at the spinning speed of 14-18m/min, desulfurizing, washing with water, oiling, and drying to obtain stretch-resistant spandex fibers for heavy crepe; wherein in the coagulating bath, the concentration of sulfuric acid is 22-28g/L, the concentration of sodium sulfate is 36-40g/L, and the concentration of zinc sulfate is 14-18 g/L.
The spandex fiber obtained by the invention has the characteristics of high heat resistance, high elasticity and high-temperature rinsing resistance, has extremely high surface softness, good mechanical property and difficult fracture, can still maintain higher performance even being continuously subjected to high-temperature steam treatment for 100min, is suitable for high-temperature printing and dyeing at 200 ℃, can be applied to various crepe fabrics, and can meet the requirements of novel fabrics and high-grade fabrics.
In the pretreatment of the sodium alginate, carboxyl on the surface of the sodium alginate reacts with amino of N, N-dimethyl (hexadecyl) amine, and the N, N-dimethyl (hexadecyl) amine is grafted on the surface of the sodium alginate, so that the characteristic of high crystallinity of the sodium alginate can be kept, the thermal stability is excellent, the textile performance can be improved, the spinning flexibility can be improved, and the sodium alginate is compounded with polyurethane emulsion for spinning, so that the sodium alginate has the advantages of good dispersibility, uniform dispersion among the sodium alginate, high bonding strength, good spinning effect, excellent mechanical property, difficulty in breaking, capability of effectively avoiding the damage of light irradiation, oxygen and acid and alkali, simple method, low cost and no pollution to the environment.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A preparation method of stretch-proof spandex fiber for heavy crepe comprises the following steps:
s1, adding 12kg of dispersing agent and 120kg of water into 60kg of pretreated sodium alginate, uniformly stirring at 80 ℃, adding 140kg of polyurethane emulsion, blending, stirring for dispersing, standing, and discharging bubbles in vacuum to obtain a premix;
the pretreated sodium alginate is prepared by the following process: stirring 16kg of sodium alginate and 50kg of sodium hydroxide solution with the concentration of 1.5mol/L for 30min at the stirring speed of 650r/min and the stirring temperature of 65 ℃, adding 8kg of N, N-dimethyl (hexadecyl) amine, continuously stirring for 10min, centrifuging, washing, adding 100kg of hydrochloric acid with the concentration of 0.4mol/L, stirring for 8min, filtering and drying to obtain the pretreated sodium alginate;
s2, metering the premix by a metering pump, feeding the premix into a coagulating bath at the temperature of 2 ℃ through a candle filter and a spinneret for spinning at the spinning speed of 18m/min, desulfurizing, washing with water, oiling, and drying to obtain stretch-proof spandex fiber for heavy crepe; wherein in the coagulating bath, the concentration of sulfuric acid is 22g/L, the concentration of sodium sulfate is 40g/L, and the concentration of zinc sulfate is 14 g/L.
Example 2
A preparation method of stretch-proof spandex fiber for heavy crepe comprises the following steps:
s1, adding 8kg of dispersing agent and 140kg of water into 80kg of pretreated sodium alginate, uniformly stirring at 70 ℃, adding 160kg of polyurethane emulsion, blending, stirring for dispersing, standing, and discharging bubbles in vacuum to obtain a premix;
the pretreated sodium alginate is prepared by the following process: stirring 10kg of sodium alginate and 70kg of 1mol/L sodium hydroxide solution for 50min at the stirring speed of 550r/min and the stirring temperature of 75 ℃, adding 4kg of N, N-dimethyl (hexadecyl) amine, continuously stirring for 20min, centrifuging, washing, adding 60kg of 0.8mol/L hydrochloric acid, stirring for 4min, filtering and drying to obtain the pretreated sodium alginate;
s2, metering the premix by a metering pump, feeding the premix into a coagulating bath with the temperature of 6 ℃ through a candle filter and a spinneret for spinning at the spinning speed of 14m/min, desulfurizing, washing with water, oiling, and drying to obtain stretch-proof spandex fiber for heavy crepe; wherein in the coagulating bath, the concentration of sulfuric acid is 28g/L, the concentration of sodium sulfate is 36g/L, and the concentration of zinc sulfate is 18 g/L.
Example 3
A preparation method of stretch-proof spandex fiber for heavy crepe comprises the following steps:
s1, adding 11kg of dispersing agent and 125kg of water into 65kg of pretreated sodium alginate, uniformly stirring at 77 ℃, adding 145kg of polyurethane emulsion, blending, stirring for dispersing, standing, and discharging bubbles in vacuum to obtain a premix;
the pretreated sodium alginate is prepared by the following process: stirring 14kg of sodium alginate and 55kg of sodium hydroxide solution with the concentration of 1.4mol/L for 35min at the stirring speed of 620r/min and the stirring temperature of 68 ℃, adding 7kgN, N-dimethyl (hexadecyl) amine, continuously stirring for 12min, centrifuging, washing, adding 90kg of hydrochloric acid with the concentration of 0.5mol/L, stirring for 7min, filtering and drying to obtain the pretreated sodium alginate;
s2, metering the premix by a metering pump, feeding the premix into a coagulating bath with the temperature of 3 ℃ through a candle filter and a spinneret for spinning at the spinning speed of 17m/min, desulfurizing, washing with water, oiling, and drying to obtain stretch-proof spandex fiber for heavy crepe; wherein in the coagulating bath, the concentration of sulfuric acid is 24g/L, the concentration of sodium sulfate is 39g/L, and the concentration of zinc sulfate is 15 g/L.
Example 4
A preparation method of stretch-proof spandex fiber for heavy crepe comprises the following steps:
s1, adding 9kg of dispersing agent and 135kg of water into 75kg of pretreated sodium alginate, uniformly stirring at 73 ℃, adding 155kg of polyurethane emulsion, blending, stirring for dispersing, standing, and discharging bubbles in vacuum to obtain a premix;
the pretreated sodium alginate is prepared by the following process: stirring 12kg of sodium alginate and 65kg of 1.1mol/L sodium hydroxide solution for 45min at the stirring speed of 580r/min and the stirring temperature of 72 ℃, adding 5kg of N, N-dimethyl (hexadecyl) amine, continuously stirring for 18min, centrifuging, washing, adding 70kg of 0.7mol/L hydrochloric acid, stirring for 5min, filtering and drying to obtain the pretreated sodium alginate;
s2, metering the premix by a metering pump, feeding the premix into a coagulating bath at the temperature of 5 ℃ through a candle filter and a spinneret for spinning at the spinning speed of 15m/min, desulfurizing, washing with water, oiling, and drying to obtain stretch-proof spandex fiber for heavy crepe; wherein in the coagulating bath, the concentration of sulfuric acid is 26g/L, the concentration of sodium sulfate is 37g/L, and the concentration of zinc sulfate is 17 g/L.
The stretch-proof spandex fiber for heavy crepe obtained in example 4 was subjected to a performance test with a general spandex fiber, and the results were as follows:
| spandex fiber obtained in example 4 | Ordinary spandex fiber | |
| 300% stress, CN | 19.6 | 21.2 |
| Breaking strength, CN | 124.1 | 109.2 |
| Elongation at break,% | 964 | 618 |
| The first exothermic peak corresponds to the temperature, deg.C | 282 | 217 |
| 99.9% residual temperature, DEG C | 241 | 208 |
| 99.0% residual temperature, DEG C | 280 | 235 |
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A preparation method of stretch-proof spandex fiber for heavy crepe is characterized by comprising the following steps:
s1, adding a dispersing agent and water into the pretreated sodium alginate, uniformly stirring, adding a polyurethane emulsion, blending, stirring, dispersing, standing, and discharging bubbles in vacuum to obtain a premix;
s2, metering the premix by a metering pump, feeding the premix into a coagulating bath through a candle filter and a spinneret for spinning, desulfurizing, washing with water, oiling, and drying to obtain stretch-proof spandex fiber for heavy crepe;
in S1, the pretreated sodium alginate is prepared by the following process: stirring sodium alginate and sodium hydroxide solution, adding N, N-dimethyl (hexadecyl) amine, continuously stirring, centrifuging, washing, adding hydrochloric acid, stirring, filtering, and drying to obtain pretreated sodium alginate;
wherein in S1, the weight ratio of the pretreated sodium alginate to the dispersing agent to the water to the polyurethane emulsion is 60-80: 8-12: 120-140: 140-160.
2. The method for preparing the stretch-proof spandex fiber for heavy creping as claimed in claim 1, wherein in S1, the dispersant and water are added to the pretreated sodium alginate and stirred uniformly at a stirring temperature of 70-80 ℃, then the polyurethane emulsion is added and blended, and after stirring and dispersing, the mixture is left to stand and subjected to vacuum foam removal to obtain a premix.
3. The method for preparing stretch-proof spandex fiber for re-creping as claimed in claim 1, wherein in the preparation process of pretreated sodium alginate of S1, the concentration of sodium hydroxide solution is 1 to 1.5mol/L and the concentration of hydrochloric acid is 0.4 to 0.8 mol/L.
4. The method for preparing stretch-proof spandex fiber for heavy creping as claimed in claim 1 or 3, wherein in the pretreatment sodium alginate preparation process of S1, the weight ratio of sodium alginate to sodium hydroxide solution to N, N-dimethyl (hexadecyl) amine to hydrochloric acid is 10-16: 50-70: 4-8: 60-100.
5. The method for preparing stretch-proof spandex fiber for heavy creping as claimed in claim 1, wherein in S1, the pretreated sodium alginate is prepared by the following process: stirring sodium alginate and sodium hydroxide solution for 30-50min at the stirring speed of 550-650r/min at the stirring temperature of 65-75 ℃, adding N, N-dimethyl (hexadecyl) amine, continuously stirring for 10-20min, centrifuging, washing, adding hydrochloric acid, stirring for 4-8min, filtering, and drying to obtain the pretreated sodium alginate.
6. The method for preparing stretch-proof spandex fiber for heavy creping as claimed in claim 1, wherein in S2, the premix is metered by a metering pump, and then enters a coagulation bath with a temperature of 2 to 6 ℃ through a candle filter and a spinneret to be spun at a spinning speed of 14 to 18m/min, and the stretch-proof spandex fiber for heavy creping is obtained through desulfurization, washing, oiling and drying; wherein in the coagulating bath, the concentration of sulfuric acid is 22-28g/L, the concentration of sodium sulfate is 36-40g/L, and the concentration of zinc sulfate is 14-18 g/L.
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| CN102817105A (en) * | 2012-08-24 | 2012-12-12 | 上海交通大学 | Preparation method of core-shell structured synthetic polymer-natural polymer composite fiber |
| CN103346281B (en) * | 2013-07-17 | 2016-04-13 | 中国科学院青岛生物能源与过程研究所 | A kind of sodium alginate base lithium battery diaphragm and preparation method thereof |
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Denomination of invention: A preparation method of stretchable spandex fiber for heavy crepe Effective date of registration: 20230613 Granted publication date: 20210416 Pledgee: Anhui Guangde Rural Commercial Bank Co.,Ltd. Pledgor: ANHUI HONGXIANG SILK WEAVING Co.,Ltd. Registration number: Y2023980043707 |
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