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Method for preparing spandex fibers with low breaking rate

A technology of spandex fiber and yarn breakage rate, applied in the direction of rayon manufacturing, fiber chemical characteristics, single-component synthetic polymer rayon, etc. Low problems, to achieve good physical properties, improve the effect of broken wire problems

Active Publication Date: 2020-02-14
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, CN100338300C improves the unwinding of spandex yarn by adding divalent stearic acid metal salt as an anti-adhesive additive to the oil agent, and patent CN101440574B adds silicone resin as an anti-blocking additive to improve the unwinding of the silk cake , although stearate and silicone resin can indeed play the role of anti-adhesive and slippery, but the anti-adhesive durability is insufficient, due to the low surface energy of silicone oil and mineral oil in the oil component, the strength of the oil film is insufficient, and the adsorption Weakness, once the tension of the spandex yarn is too high or it is placed for a long time, the oil agent will easily migrate from the bottom of the yarn cake to the surface, resulting in a large difference between the surface and the inside of the spandex yarn, and it is easy to break the yarn in the subsequent application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Add polystyrene, acrylic resin and N,N-dimethylacetamide into the reaction kettle, heat the temperature to 60°C, and stir evenly to obtain a blend solution A with a solid content of 35%. According to the solid content of spandex fiber, polystyrene accounts for 0.5%, and acrylic resin accounts for 1.0%.

[0030] 2) Add polytetramethylene ether glycol with a number average molecular weight of 1810, 4,4'-diphenylmethane diisocyanate and N,N-dimethylacetamide to form a 69% mass fraction of solution, and reacted at 45°C for 120 minutes to prepare a prepolymer. After the prepolymer is cooled to 8°C, chain extension reaction is carried out with a mixed amine solution of ethylenediamine and diethylamine having a mass fraction of 5.5%, wherein the molar ratio of ethylenediamine to diethylamine is 20 :1. According to the solid content of polyurethane urea elastic fiber, 0.5wt% of 2-(2'-hydroxyl-3', 5'-di-tert-butylphenyl)-benzotriazole), 0.5wt% of bis(N, Add N-dimethylhydra...

Embodiment 2

[0034] Spandex fibers were prepared according to the same method described in Example 1, except that the proportion of polystyrene was 5.0%. The abrasion amount thereof was evaluated, and the evaluation results are shown in Table 1 below.

Embodiment 3

[0036] Spandex fibers were prepared according to the same method described in Example 1, except that the proportion of polystyrene was 10.0%. The abrasion amount thereof was evaluated, and the evaluation results are shown in Table 1 below.

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Abstract

The invention relates to a method for preparing spandex fibers with low breaking rate, in particular to a method for manufacturing spandex by introducing a blend solution of an abrasion-resistant agent and a flow promoter into a polyurethane urea spinning solution; the method includes: 1) blending and dissolving the abrasion-resistant agent and the flow promoter in an organic solvent to obtain a blend solution A; 2) adding the blend solution A into the polyurethane urea spinning solution B to prepare a spinning dope C, and performing spinning and winding with the spinning stock solution C. Themethod herein is simple and convenient to implement and can be widely applied to spandex fibers of different varieties, and the breaking condition of the prepared spandex fibers is obviously alleviated.

Description

technical field [0001] The invention relates to a method for manufacturing a novel functionalized spandex fiber, in particular to a method for manufacturing a spandex fiber with improved filament breakage, and the invention belongs to the technical field of polymer material preparation. Background technique [0002] Spandex is a highly elastic chemical fiber, its elongation at break is 500% to 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, during the weaving and unwinding process of spandex fiber, it needs to pass through many driven wire guide wheels. When running for a long time, spandex fiber is prone to broken wires. After the wire wheel has been running for a long time, the inner wall will be worn to varying degrees, which will make the spandex yarn in a state of obstruction or even cut during the guiding process, increasing the number of bro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/76C08G18/66C08G18/48C08G18/10C08G18/32
CPCD01F6/94D01F1/10C08G18/7671C08G18/4854C08G18/10C08G18/3228
Inventor 王靖梁红军杨晓印许图远周志伟
Owner ZHEJIANG HUAFENG SPANDEX
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