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A kind of preparation method of multifunctional polyurethane elastic fiber

A polyurethane elastic, multi-functional technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking

Active Publication Date: 2021-01-05
华峰重庆氨纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports about realizing the multifunctionality of spandex fiber through a technical solution.

Method used

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  • A kind of preparation method of multifunctional polyurethane elastic fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, polytetrahydrofuran ether glycol PTMG (molecular weight 1810) 96.15Kg, dimethylacetamide 58.64kg, N-methyldiethanolamine 0.1923kg (the content of N-methyldiethanolamine in PTMG is 2000ppm) mixed uniformly, Then add 25.757 kg of MDI and raise the temperature to 45° C. for 60 minutes to form a prepolymer solution, wherein the concentration of the prepolymer solution is 50%.

[0033] Cool the prepolymer solution to below 15°C, add N,N-dimethylacetamide solution containing 2.23kg of ethylenediamine, 0.687kg of propylenediamine and 0.289kg of diethylamine for chain extension reaction and Chain termination reaction; then add the DMAC solution of matting agent, anti-ultraviolet absorber, antioxidant and lubricating release agent to form a polyurethane spinning stock solution, wherein the molar content of terminal amino groups on the polymer body in the polyurethane spinning stock solution is 15mmol / kg ; The apparent viscosity at 40°C after the stock soluti...

Embodiment 2

[0035] The preparation method is the same as in Example 1, except that the content of N-methyldiethanolamine in PTMG is 4000 ppm, and the molar content of terminal amino groups on the polymer body in the polyurethane spinning dope is 25 mmol / kg.

Embodiment 3

[0037] The preparation method is the same as in Example 1, except that the content of N-methyldiethanolamine in PTMG is 6000 ppm, and the molar content of terminal amino groups on the polymer body in the polyurethane spinning dope is 35 mmol / kg.

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Abstract

The invention discloses a preparation method of multifunctional polyurethane elastic fibers, and belongs to the technical field of high polymer material preparation. The method is particularly suitable for high-speed spinning of spandex fibers, the production efficiency of the spandex fibers is improved, and meanwhile, the spandex fibers have the characteristics of being high in elongation and easy to dye. The method comprises the following steps: (1) uniformly mixing a solvent, N-methyldiethanolamine and polyether polyol; (2) adding diisocyanate MDI based on a set -NCO / -OH ratio, and pre-polymerizing to obtain a prepolymer solution; (3) adding a mixed amine solution of a chain extender and a chain terminator into the prepolymer solution obtained in step (2), and polymerizing to obtain a polyurethane solution; (4) adding a plurality of additives into the polyurethane solution, and fully uniformly mixing to obtain a polyurethane spinning stock solution; and (5) ageing the prepared polyurethane spinning stock solution, and spinning in a dry manner to obtain the polyurethane elastic fibers. The preparation method has the advantage of high production efficiency; and the spandex fibershave the characteristics of being high in elongation, easy to dye, and easy to size.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a preparation method of multifunctional polyurethane elastic fibers. The polyurethane elastic fiber produced by the preparation method has the advantages of high production efficiency, and at the same time, the polyurethane elastic fiber has the characteristics of high elongation, easy dyeing and easy shaping. . Background technique [0002] Polyurethane elastic fiber is a kind of synthetic fiber, which is generally called spandex in our country, and has been widely used in fabrics. Its production process is generally formed by the reaction of high molecular weight diol compound and excess diisocyanate to form a prepolymer, and then add amine chain extender and chain terminator to react to obtain polyurethane urea spinning stock solution, and finally through dry method or wet method Polyurethane elastic fibers are obtained after spinning. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94
CPCD01F6/94
Inventor 薛士壮杨晓印晋中成钱锦刘刚
Owner 华峰重庆氨纶有限公司