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High-resilience urethane elastic fiber as well as preparation method thereof

A spandex fiber and high-resilience technology, which is applied in the field of preparation of high-resilience spandex fiber, can solve the problems of inconspicuous effect, unstable storage of spinning solution, and affecting production stability, etc., and achieves low cost, easy industrial implementation, Ease of promotion

Active Publication Date: 2013-12-11
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many patented technologies on the production of high-resilience spandex. U.S. patents US5981686, US5000899, and US5708118 improve the soft segment structure to achieve the purpose of improving the separation of soft and hard segments, but the effect is not obvious; Chinese patent CN101469463A adopts MDI The realization of chemical cross-linking leads to a large amount of gel in the spinning solution, which seriously affects the production stability; Chinese patent CN102277649B strengthens the physical cross-linking by increasing the number of hydrogen bonds to achieve the purpose of improving the separation degree of soft and hard segments, but the spinning solution Extremely unstable during storage

Method used

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  • High-resilience urethane elastic fiber as well as preparation method thereof
  • High-resilience urethane elastic fiber as well as preparation method thereof
  • High-resilience urethane elastic fiber as well as preparation method thereof

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preparation example Construction

[0024] The preparation method of high resilience spandex fiber of the present invention comprises the following steps:

[0025] 1) Mix the raw materials polytetramethylene ether glycol PTMG and 4,4-diphenylmethane diisocyanate MDI, and react at 75-90°C for 100-120 minutes to prepare a prepolymer, wherein the molar ratio of MDI to PTMG is (1.80~2.00): 1;

[0026] 2) Prepare chain extender mixture solution: dissolve one or both of ethylenediamine and butylenediamine into the solvent N,N-dimethylacetamide DMAc to form a chain extender with a mass percentage concentration of 1.00-4.00%. Chain agent mixture solution;

[0027] 3) Add the prepolymer into the chain extender mixture solution and stir, wherein the molar ratio of amine to isocyanate is (0.90-0.98): 1, react to form a mass percent concentration 35-45% low molecular weight polyurethane solution;

[0028] 4) Add diethylenetriamine DETA to the low-molecular-weight polyurethane solution and stir, wherein the molar ratio of...

Embodiment 1

[0036] Step 1: Fabrication of Modified Attapulgite Nanorods

[0037] 1) At 70°C, add 4,4-diphenylmethane diisocyanate to the polyether diol, wherein the molar ratio of isocyanate to hydroxyl is 1.90:1; after 150 minutes of reaction, Diethylamine was added, wherein the molar ratio of secondary amino groups to isocyanate groups was 1.02:1 to obtain liquid polyurethane.

[0038] 2) Dry the nano-attapulgite at 120°C for 5 hours; place the treated nano-attapulgite in a stainless steel kettle, vacuumize to 0.01 standard atmospheric pressure, and the temperature is 70°C, inject liquid polyurethane into the stainless steel kettle to impregnate the nano Stir the attapulgite vigorously, apply an air pressure of 0.5MPa, and keep the pressure for 1.5 hours, wherein the mass ratio of liquid polyurethane to nano-attapulgite is 6:1.

[0039] Step 2: Manufacture of Fiber-Forming Polymer

[0040] 1) Mix raw materials polytetramethylene ether glycol (PTMG) and 4,4-diphenylmethane diisocyanate...

Embodiment 2

[0051] Step 1: Fabrication of Modified Attapulgite Nanorods

[0052] 1) At 70°C, add 4,4-diphenylmethane diisocyanate to the polyether diol, wherein the molar ratio of isocyanate to hydroxyl is 1.90:1; after 150 minutes of reaction, Diethylamine was added, wherein the molar ratio of secondary amino groups to isocyanate groups was 1.02:1 to obtain liquid polyurethane.

[0053] 2) Dry the nano-attapulgite at 120°C for 5 hours; place the treated nano-attapulgite in a stainless steel kettle, vacuumize to 0.01 standard atmospheric pressure, and the temperature is 70°C, inject liquid polyurethane into the stainless steel kettle to impregnate the nano Stir the attapulgite vigorously, apply an air pressure of 0.5 MPa, and keep the pressure for 1.5 hours, wherein the mass ratio of liquid polyurethane to nano-attapulgite is 5:1.

[0054] Step 2: Manufacture of Fiber-Forming Polymer

[0055] 1) Mix raw materials polytetramethylene ether glycol (PTMG) and 4,4-diphenylmethane diisocyanat...

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Abstract

The invention relates to a preparation method of a high-resilience urethane elastic fiber. The preparation method comprises the following steps: (1) mixing raw materials, namely, polytetramethylene ether glycol (PTMEG) and 4, 4-diphenylmethane diisocyanate (MDI) to carry out reaction so as to obtain a prepolymer; (2) adding a certain amount of a mixed diamine chain extender into the prepolymer to form polymer liquor; (3) quickly adding polyamine (the number of functional groups is greater than 2) into the polymer liquor while stirring to carry out reaction so as to form polyurethaneurea liquor; (5) carrying out reaction on MDI and polyether polyhydric alcohol and blocking with ethanediamine to prepare oligomers; (6) blending nano attapulgite with the oligomers to prepare a prepreg; and (7) mixing the polyurethaneurea liquor with the prepreg to prepare a spinning dope, and spinning to form the high-resilience urethane elastic fiber. The preparation method of the high-resilience urethane elastic fiber provided by the invention satisfies the demands on the high-resilience urethane elastic fiber in certain special fields, and the resilience of the urethane elastic fiber is improved.

Description

technical field [0001] The invention relates to a functional chemical fiber and its manufacturing method technology, in particular to a preparation method technology of high resilience spandex fiber. Background technique [0002] Spandex is a kind of polyurethane elastic fiber, known as "fabric monosodium glutamate", and there is a saying in the industry that "no ammonia can't make cloth". It can be seen that spandex is one of the key factors to improve the quality of fabrics. Because of its excellent elastic performance and stress resistance, it is often blended with other yarns (cotton, polyester, nylon, cupro, etc.) and used in the field of elastic fabric weaving. [0003] At present, there are many patented technologies on the production of high-resilience spandex. U.S. patents US5981686, US5000899, and US5708118 improve the soft segment structure to achieve the purpose of improving the separation of soft and hard segments, but the effect is not obvious; Chinese patent C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/66C08G18/48C08G18/10
Inventor 王小华席青费长书梁红军薛士壮胡炜伟
Owner ZHEJIANG HUAFENG SPANDEX
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