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Method for producing polyether black spandex fibers

A technology of spandex fiber and production method, which is applied in the direction of fiber chemical characteristics, melt spinning method, single-component synthetic polymer rayon, etc., can solve the problems of spandex dyeing difficulties, achieve high color fastness, stable production process, and high quality unaffected effect

Active Publication Date: 2011-03-09
JIANGSU SHUANGLIANG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of difficulty in spandex dyeing in the existing spandex dyeing process, and to provide a production method of polyether-type black spandex fibers that make the produced spandex itself appear black

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 423 grams of polytetramethylene ether glycol (molecular weight 1810 Shanxi Sanwei) and 99 grams of 4,4'-diphenylmethane diisocyanate (NPU) were placed in a reaction vessel, and reacted at 90 ° C for 120 min to obtain an isocyanate-based sealant. end prepolymer, then add 846 grams of dimethylacetamide to dissolve to form a prepolymer solution; add 8 grams of ethylenediamine and 2.6 grams of 1,2-propanediamine to the prepolymer solution while stirring (slowly). The amine mixture solution formed by dissolving 0.9 g of diethylamine in 155 g of dimethylacetamide was subjected to chain extension reaction to obtain a polyurethane urea solution; The mixture composed of 1 g of dimethylacetamide and 30 g of polyurethane urea solution is made into a uniform black mother liquor; then the polyurethane urea solution and the black mother liquor are simultaneously metered into a static mixer and mixed uniformly to form a spandex spinning solution, in which the black The amount of mothe...

Embodiment 2

[0019] Put 305 grams of polytetramethylene ether glycol (molecular weight 1810, Shanxi Sanwei) and 74 grams of 4,4'-diphenylmethane diisocyanate (NPU) in a reaction vessel, and react at 90 ° C for 120 min to obtain isocyanate groups. End-capped prepolymer, and then add 614 grams of dimethylacetamide to dissolve to form a prepolymer solution; add 5.4 grams of ethylenediamine, 2.6 grams of 1,2-propane diamine to the prepolymer solution while stirring (slowly) The amine mixture solution formed by dissolving amine and 1.0 g of diethylamine in 150 g of dimethylacetamide was subjected to chain extension reaction to obtain a polyurethaneurea solution; The mixture composed of 6 grams of dimethylacetamide and 24 grams of polyurethane urea solution is made into a uniform black mother liquor; then the polyurethane urea solution and the black mother liquor are simultaneously metered into a static mixer and mixed uniformly to form a spandex spinning solution, wherein The amount of black mo...

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Abstract

The invention relates to a method for producing polyether black spandex fibers, which comprises the following steps: (1) reacting polytetramethylene ether glycol with 4,4-diphenylmethane diisocyanate for 110min to 130min at a temperature of 85 to 95 DEG C so as to obtain isocyanate-terminated prepolymer; (2) dissolving the obtained isocyanate-terminated prepolymer by using dimethyl acetamide as solvent so as to obtain prepolymer solution; (3) feeding the prepolymer solution and solution of amine mixtures into a screw-extrusion dynamic mixer so as to generate polyurethaneurea solution; (4) carrying out grinding dispersion on carbon blacks, dispersing agent for carbon black, dimethyl acetamide and a small amount of polyurethaneurea solution so as to obtain black mother liquor; (5) metering the polyurethaneurea solution and the black mother liquor, then simultaneously putting the polyurethaneurea solution and the black mother liquor into a static mixer, evenly mixing the obtained mixture so as to obtain polyurethane spinning solution; and (6) extruding the spinning solution by a spinneret plate and then forming spinning filaments, evaporating the spinning filaments by a spinning channel so as to remove the dimethyl acetamide, then winding the obtained product so as to obtain the black spandex fibers. In the method, the produced spendex is black.

Description

technical field [0001] The invention relates to a production method of polyether type black spandex fiber. It belongs to the technical field of spandex fiber preparation. Background technique [0002] Spandex is a long-chain polymer synthetic fiber containing at least 85% by weight of polyurethane segments. Its elongation at break is generally 500%-700%, its elastic recovery rate is generally greater than 90%, and its breaking strength is high. Widely used in knitted and woven fabrics. However, since there are no coloring groups in the molecular structure of spandex itself, when it is dyed after blending with other fibers, under normal dyeing conditions, there will often be insufficient dyeing of spandex, and if the dyeing conditions are too intense, it will cause spandex. The phenomenon of silk melting and breaking affects the elasticity and use of the fabric. [0003] As one of the most commonly used pigments in the chemical industry, carbon black has high blackness, bu...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/04D01F1/10D01D1/02D01D5/08C08G18/66C08G18/48
Inventor 郑勇刘桂英周志能
Owner JIANGSU SHUANGLIANG SPANDEX
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