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Process for producing polyether type easy dyeing spandex fiber

A technology of spandex yarn and polyether type is applied in the manufacture of new spandex fibers and the manufacture of polyether spandex fibers. The effect of high dye uptake

Inactive Publication Date: 2008-01-02
YANTAI TAYHO ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for manufacturing spandex fibers with good dyeability, so as to solve the difficult problem of spandex dyeing in the existing spandex dyeing process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing polyether-type dyeable spandex yarns, using 2000 parts of polytetramethylene ether glycol with a molecular weight of 2000 and 500 parts of 4,4-diphenylmethane diisocyanate (MDI) to react at 85 ° C for 70 minutes to obtain The prepolymer with isocyanate groups at both ends was dissolved by adding 4487 parts of dimethylformamide to form a solution, cooled to 12°C, and 60 parts of 1,2-propylenediamine and 15 parts of N,N-bis( The solution formed by dissolving 2-aminoethyl)methylamine in 983 parts of dimethylformamide was subjected to chain extension reaction. When the viscosity of the stock solution reaches 3500 poise (20°C), stop adding, and then add 20 parts / 72 parts of n-butylamine / dimethylformamide solution to the polymer to react with free isocyanate groups. Then add anhydrous acetic anhydride / dimethylformamide to stabilize the viscosity of the solution at 20 parts / 72 parts. A polyurethane solution with a viscosity of 3400poise (20°C) and a sol...

Embodiment 2

[0018] According to the same method as in Example 1, using N,N-dimethylacetamide instead of N,N-dimethylformamide, 2--280denier spandex fibers with good dyeability can also be obtained.

Embodiment 3

[0020] According to the same method of Example 1, using 30 parts of N, N-bis (3-aminopropyl) methylamine instead of 15 parts of N, N-bis (2-aminoethyl) methylamine, the same dyeing Good performance 20-280denier spandex fiber.

[0021] The above embodiment is a preparation method of polyether-type easy-to-dye spandex yarn. The dyeability and color fastness of the prepared spandex fiber are significantly improved. The advantages of high density, in the production process of spandex fiber, the production process is stable, and the quality of spandex yarn is not affected.

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Abstract

The invention discloses a preparing method of a new spandex fibre with good dyeing behavior in weaving technique domain, which is characterized by the following: choosing polyurethane solution with polyurethanes or polyurethanes urea as main component; proceeding enlargered chain reaction; spinning; producing spandex fibre; possessing organic compound as enlarged chain agent in mixing amine enlarged chain agent solution. This invention possesses the advantages of high dying ratio, big colour stability and stable productive process.

Description

1. Technical field [0001] The invention relates to a method for manufacturing novel spandex fibers, in particular to a method for manufacturing polyether type spandex fibers with good dyeing performance, and belongs to the technical field of textiles. 2. Background technology [0002] Spandex is a highly elastic textile fiber, its elongation at break is generally 500%-700%, its elastic recovery rate is generally greater than 90%, and its breaking strength is high. Therefore, spandex fiber is widely used in knitted and woven fabrics. However, due to the lack of coloring groups in the molecular structure of spandex itself, it is difficult to dye spandex under normal dyeing conditions. According to reports, spandex production enterprises use compounds containing trivalent nitrogen to spandex spinning stock solution to produce dyeable spandex, but this method is likely to affect the stability of spandex yarn during spinning; at the same time, when the amount of addition is small...

Claims

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Application Information

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IPC IPC(8): D01F6/70D01F1/10C08G18/48
Inventor 韩虎梁国东林荣陈文健
Owner YANTAI TAYHO ADVANCED MATERIALS
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