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Elastic flame-retardant wrap yarn with skin-core structure and preparation method thereof

A technology of sheath-core structure and covered yarn, which is applied in the field of flame-retardant fibers, can solve problems such as large influence of fibers, complex process, and fluctuation of stock solution quality, and achieve the effects of enhancing water-washing resistance, reducing manufacturing costs, and improving flame-retardant performance

Pending Publication Date: 2021-12-17
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, flame-retardant spandex can be prepared by fabric finishing method. Patent CN202010913253.3 discloses a spandex fiber impregnated with antistatic agent and flame-retardant polyester to prepare flame-retardant and antistatic woven labels. Spandex is impregnated to obtain antistatic resistance. However, this method is complex in process, heavy in pollution, and has a great impact on the fiber, and the fiber has poor washing resistance. After repeated washing, the flame retardant performance is greatly reduced.
The flame retardant modification method of blending is to add flame retardants as auxiliary materials to the spinning dope to affect the mechanical properties of spandex; the flame retardant modification method of graft copolymers is to graft reactive compounds into polymer segments. The process may affect the spandex polymerization reaction, resulting in fluctuations in the quality of the stock solution and affecting the physical properties of the spandex

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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  • Elastic flame-retardant wrap yarn with skin-core structure and preparation method thereof
  • Elastic flame-retardant wrap yarn with skin-core structure and preparation method thereof
  • Elastic flame-retardant wrap yarn with skin-core structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In the first reactor, polytetramethylene ether glycol and diisocyanate with a molar ratio of 1:1.55 were added, the reaction temperature was 65°C, and the reaction time was 60 minutes to prepare a prepolymer. DMAC was added to dissolve the prepolymer and transferred to the second reactor. In the second reactor, according to the content of NCO in the prepolymer, mixed amines are added for chain extension reaction, (NH 2 The mol ratio of +NH) / NCO is 1.02, and described mixed amine comprises diethylamine, ethylenediamine and pentamethylenediamine, and the mol ratio of diethylamine, ethylenediamine and pentamethylenediamine is 1:4:1, The reaction temperature is 2°C, and the polyurethane polymer solution with the required viscosity for spinning is obtained through sufficient reaction. Add the antioxidant of 0.2wt% core layer spinning dope solid content, the matting agent of 0.2wt% core layer spinning dope solid content, the anti-yellowing agent of 0.5wt% core layer spinning...

Embodiment 2

[0051] In the first reactor, polytetramethylene ether glycol and diisocyanate with a molar ratio of 1:1.7 were added, the reaction temperature was 70°C, and the reaction time was 80 minutes to prepare a prepolymer. DMAC was added to dissolve the prepolymer and transferred to the second reactor. In the second reactor, according to the content of NCO in the prepolymer, mixed amines are added for chain extension reaction, (NH 2 The mol ratio of +NH) / NCO is 1.05, and described mixed amine comprises diethylamine, ethylenediamine and pentamethylenediamine, and the mol ratio of diethylamine, ethylenediamine and pentamethylenediamine is 1:6:1.4, Fully react to obtain a polyurethane polymer solution with the required viscosity for spinning. Wherein add the antioxidant of 1.5wt% core layer spinning dope solid content, the matting agent of 0.7wt% core layer spinning dope solid content, the anti-yellowing agent of 1.5wt% core layer spinning dope solid content, 0.3wt% core The lubricant ...

Embodiment 3

[0054] In the first reactor, add diisocyanate and polytetramethylene ether glycol with a molar ratio of 1:2.15, the reaction temperature is 80°C, and the reaction time is 90 minutes to prepare a prepolymer. DMAC was added to dissolve the prepolymer and transferred to the second reactor. In the second reactor, according to the content of NCO in the prepolymer, mixed amines are added for chain extension reaction, (NH 2 The mol ratio of +NH) / NCO is 1.1, and described mixed amine comprises diethylamine, ethylenediamine and pentamethylenediamine, and the mol ratio of diethylamine, ethylenediamine and pentamethylenediamine is 1:7:2, Fully react to obtain a polyurethane polymer solution with the required viscosity for spinning. Wherein add 2.5wt% the antioxidant of core layer spinning dope solid content, the matting agent of 1.5wt% core layer spinning dope solid content, the anti-yellowing agent of 2.5wt% core layer spinning dope solid content, 0.5wt% core The lubricant with the so...

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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Abstract

The invention discloses an elastic flame-retardant wrap yarn with a skin-core structure and a preparation method thereof. The elastic flame-retardant wrap yarn comprises two pieces of core yarn arranged in parallel, wherein one piece of core yarn is flame-retardant spandex with the skin-core structure, and the other piece of core yarn is a basalt fiber; outer wrapping yarn is arranged on the outer sides of the two pieces of core yarn; and the outer wrapping yarn is flame-retardant fiber. During preparation, basalt fiber powder is added into a spandex spinning stock solution to serve as a skin layer spinning stock solution, the spandex spinning stock solution serves as a core layer spinning stock solution, and spinning is conducted through a spinneret plate of the skin-core structure; and the prepared flame-retardant spandex with the skin-core structure serves as the core yarn, the core yarn and the basalt fiber are arranged in parallel, the flame-retardant fiber serves as an outer-layer wrapping fiber, and the flame-retardant wrapping yarn is prepared. According to the elastic flame-retardant wrap yarn with the skin-core structure and the preparation method thereof, a prepared elastic flame-retardant wrap yarn product with the skin-core structure has the characteristics of being good in elasticity and flame retardance.

Description

technical field [0001] The invention relates to the field of flame-retardant fibers, in particular to an elastic flame-retardant covered yarn with a sheath-core structure and a preparation method thereof. Background technique [0002] In metallurgy, chemical industry, petroleum, fire-fighting and other working environments that are prone to open flames or flammable and explosive, it is explicitly required that corresponding posts be equipped with flame-retardant work clothes to protect workers from open flames or heat sources. Since protective clothing needs to be worn for a long time, there are also certain requirements for the comfort of protective clothing. If the flame-retardant yarn has a certain degree of elasticity, it will help to improve the comfort performance of the fabric. [0003] At present, most of the flame-retardant yarns used in flame-retardant protective clothing are intrinsic flame-retardant fibers. Because of the intrinsic flame-retardant fibers, the nu...

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): D02G3/32D02G3/44D02G3/04D01F1/07D01F8/16D01D5/34
CPCD02G3/328D02G3/443D02G3/442D02G3/04D01F1/07D01F8/16D01D5/34
Inventor 宋悦贾秋梓万旭光
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD