Spandex fiber having excellent chlorine resistance and discoloration resistance and method for preparing same

A technology of spandex fiber and discoloration resistance, which is applied in rayon manufacturing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of loss of inherent characteristics of spandex fiber, short-term or instantaneous appearance of chlorine resistance, and achieve improved discoloration. Effect

Active Publication Date: 2015-11-11
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a spandex fiber having good chlorine resistance and discoloration resistance, which can not only exert chlorine resistance, but also improve the duration of the effect, and also improve discoloration at the same time, and a method for producing the same , which can maintain its own inherent characteristics, thereby solving the problem that the fiber is prone to discoloration when the chlorine-resistant spandex fiber using an inorganic chlorine-resistant agent in the prior art is exposed to various environmental factors or placed in the air , and solve the phenomenon of short-term or instantaneous appearance of chlorine resistance effect and the loss of inherent characteristics of spandex fiber

Method used

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  • Spandex fiber having excellent chlorine resistance and discoloration resistance and method for preparing same

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Embodiment approach

[0016] The manufacturing method of spandex fiber with good chlorine resistance and discoloration resistance described in the present invention comprises: the first step is the step of manufacturing polyurethane prepolymer solution, at first making diphenylmethane-4,4'-diisocyanate React with polytetramethylene ether glycol with a molecular weight of 1800 to 3000 to make a polyurethane prepolymer with isocyanate at both ends, and then add dissolved dimethylacetamide to make a polyurethane prepolymer solution.

[0017] The second step is a step of producing a polyurethane solution from the above polyurethane prepolymer solution, by adding a solution of ethylenediamine and diethylamine dissolved in dimethylacetamide to the prepolymer solution to produce a polyurethane solution.

[0018] The third step is the step of making spinning dope by adding to the polymer of polyurethane solution. In the step of making spinning dope, the additives used are light-resistant agent, inorganic ch...

Embodiment 1

[0040] In a nitrogen stream, 518g of diphenylmethane-4,4'-diisocyanate and 2328g of polytetramethylene ether glycol (molecular weight: 1800) were reacted at 90°C for 95 minutes with stirring, thus producing Polyurethane prepolymers with isocyanates. After cooling the prepolymer to room temperature, 4269 g of dimethylacetamide was added and dissolved to obtain a polyurethane prepolymer solution.

[0041] Next, 43 g of ethylenediamine and 9.1 g of diethylamine were dissolved in 1889 g of dimethylacetamide, and the above prepolymer solution was added at 9° C. or lower, thereby obtaining a polyurethane solution.

[0042] With respect to the solid content of the above polymers, the following were added and mixed as additives: 0.1 wt% titanium dioxide as light stabilizer, 4 wt% as chlorine resist coated with 1 wt% melamine phosphate relative to hydrotalcite , 2wt% stearic acid hydrotalcite [Mg 4 Al 2 (OH) 12 CO 3 ·3H 2 O]; and further add and mix the following substances in th...

Embodiment 2

[0056] In addition to using 2.0 wt% of 1,1,1',1'-tetramethyl-4,4'-(methylene-di-p-phenylene) as a disemicarbazide compound in the above-mentioned Example 1 Except disemicarbazide, the same polymer as in Example 1 was used to produce spandex fiber yarn, and chlorine resistance and discoloration resistance were evaluated under the same conditions as in Example 1 above, and the results are shown in Table 1.

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Abstract

The purpose of the present invention is to solve problems of easy discoloration of a chlorine-resistant spandex fiber employing an inorganic chlorine resistant agent when left in the air, a short-term or temporary chlorine resistant effect, and the loss of a unique trait of a spandex fiber, and to provide a spandex fiber having excellent chlorine resistance and discoloration resistance and a method for preparing the same, wherein the spandex fiber is prepared by adding and mixing, as organic additives for improving chlorine resistance added in the preparation of a normal chlorine-resistant spandex fiber, at least one compound among symmetric di-hindered hydroxyphenyl-based compounds and mono-hindered hydroxyphenyl-based compounds, an additive containing a semicarbazide-based compound having heat resistance and a radical scavenger function, and an urethane-based additive containing a tertiary butyl group serving as a secondary antioxidant, into a slurry of a polyurethane solution, thereby preparing a spinning solution, followed by defoamation, dry spinning, and winding.

Description

technical field [0001] The present invention relates to a spandex fiber with good chlorine resistance and discoloration resistance and a manufacturing method thereof. In particular, the present invention relates to a spandex fiber with improved discoloration resistance capable of preventing yellowing and damage to physical properties caused by various surrounding environmental factors while improving chlorine resistance, and a manufacturing method thereof. In addition to the inorganic chlorine resistance agent for imparting chlorine resistance, it is obtained by adding an organic additive. Background technique [0002] Spandex fiber refers to a synthetic fiber made of polyurethane fiber and elastic yarn, which belongs to high value-added fiber compared with nylon or polyester fiber in the prior art. Spandex fibers are widely used in the production of sportswear such as women's underwear or swimsuits, stockings, and baby diapers due to their characteristics of easy stretchin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/70D01D5/04
CPCD01F6/70D01D5/04D01F1/10
Inventor 洪智慧郑贤基姜渊秀
Owner HYOSUNG CORP
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