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Preparation method of flame-retardant Lyocell fiber

A fiber and concentration technology, applied in the manufacture of fire-resistant and flame-retardant filaments, fiber chemical characteristics, single-component cellulose artificial filaments, etc., can solve the difficulty in combining organic phosphorus flame retardants with cellulose fibers and the flame-retardant effect of fabrics Weakening, organophosphorus flame retardant falling off and other problems, to achieve the effect of strong binding force, low price, and little environmental pollution

Inactive Publication Date: 2019-03-01
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the combination of organophosphorus flame retardants and cellulose fibers is difficult. Even if the organophosphorus flame retardants are attached to the surface of cellulose fibers, the organophosphorus flame retardants may fall off after repeated washing of the fabric. Burning effect will be severely weakened
[0004] Lyocell fiber has excellent properties and is widely used in many fields. However, lyocell fiber with flame retardant properties has hardly been reported. If it is endowed with flame retardant properties, it will definitely be obtained in more fields. widely used

Method used

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  • Preparation method of flame-retardant Lyocell fiber
  • Preparation method of flame-retardant Lyocell fiber

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Embodiment 1

[0021] A kind of preparation method of flame-retardant lyocell fiber of the present embodiment, described preparation method comprises the following steps:

[0022] (1) Preparation of spinning solution: the aqueous solution of NMMO with a mass fraction of 50.4% is distilled under reduced pressure to an aqueous solution of NMMO of 86.7%, tris (2,3-dibromopropyl) phosphate and cotton pulp (Shandong Yinying Chemical Fiber Co., Ltd.) dissolved in NMMO aqueous solution, wherein the mass ratio of tris(2,3-dibromopropyl) phosphate to cotton pulp is 1:25, the mass (g) of cotton pulp and the volume of NMMO aqueous solution ( mL) with a bath ratio of 1:15, stirred and dissolved under vacuum at 105°C for 3.5 hours in a reactor to obtain a uniform spinning solution with a mass fraction of 15.8%;

[0023] (2) Spinning of lyocell fibers: Add the spinning solution treated in step (1) into a screw extruder, further dissolve at 90°C, then filter, and enter the spinning system, wherein the air ...

Embodiment 2

[0030] A kind of preparation method of flame-retardant lyocell fiber of the present embodiment, described preparation method comprises the following steps:

[0031] (1) Preparation of spinning solution: the aqueous solution of NMMO with a mass fraction of 52.6% is distilled under reduced pressure to an aqueous solution of NMMO of 88.7%, tris (2,3-dibromopropyl) phosphate and cotton pulp (Shandong Yinying Chemical Fiber Co., Ltd.) dissolved in NMMO aqueous solution, wherein the mass ratio of tris(2,3-dibromopropyl) phosphate to cotton pulp is 1:30, the mass (g) of cotton pulp and the volume of NMMO aqueous solution ( mL) with a bath ratio of 1:20, stirred and dissolved under vacuum at 125°C for 4 hours in a reactor to obtain a uniform spinning solution with a mass fraction of 17.6%;

[0032] (2) Spinning of lyocell fiber: Add the spinning solution treated in step (1) into a screw extruder, further dissolve it at 100°C, then filter and enter the spinning system, wherein the air ...

Embodiment 3

[0039] A kind of preparation method of flame-retardant lyocell fiber of the present embodiment, described preparation method comprises the following steps:

[0040] (1) Preparation of spinning solution: the aqueous solution of NMMO with a mass fraction of 54.9% is distilled under reduced pressure to an aqueous solution of NMMO of 87.6%, tris (2,3-dibromopropyl) phosphate and cotton pulp (Shandong Yinying Chemical Fiber Co., Ltd.) dissolved in NMMO aqueous solution, wherein the mass ratio of tris(2,3-dibromopropyl) phosphate to cotton pulp is 1:26, the mass (g) of cotton pulp and the volume of NMMO aqueous solution ( mL) with a bath ratio of 1:20, stirred and dissolved under vacuum at 105°C for 3 hours in a reactor to obtain a uniform spinning solution with a mass fraction of 16.6%;

[0041] (2) Spinning of lyocell fibers: Add the spinning solution treated in step (1) into a screw extruder, further dissolve at 100°C, then filter, and enter the spinning system, wherein the air g...

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Abstract

The invention relates to a preparation method of flame-retardant Lyocell fiber. The preparation method is characterized in that flame retardants of tris-(2,3-dibromopropyl)phosphate and cotton pulp are dissolved in an N-methylmorpholine-N-oxide water solution; a spinning solution is prepared; the spinning solution enters a spinning system; sprayed silk threads are vertically stretched in air and enter a coagulating bath tank to be coagulated into fiber; the fiber is subjected to the processes such as alcohol washing, blanching, water washing, oiling and drying; the flame-retardant Lyocell fiber is obtained. The dry breaking strength intensity of the prepared Lyocell fiber is 43 to 45 cN / tex, and the dry breaking elongation is 13.5 to 15 percent; the wet breaking strength of the Lyocell fiber is 31.5 to 33 cN / tex, and the wet breaking elongation of the fiber is 15 to 17 percent; the major strong performance approaches to that of commercially-available Lyocell fiber. The limit oxygen index of the prepared flame-retardant Lyocell fiber reaches 33 percent or higher; after water washing for 20 times, the flame-retardant effect is still not obviously weakened; the result shows that the combining force of the flame retardant and cellulose is high.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant textiles, and in particular relates to a preparation method of flame-retardant lyocell fibers. Background technique [0002] Lyocell fiber is an excellent cellulose fiber, which has the hygroscopicity and comfort of natural fibers, and has the advantages of high strength of synthetic fibers. The preparation method of the lyocell fiber is to use N-methylmorpholine-N-oxide (abbreviation: NMMO) as a solvent to directly dissolve the spinning pulp, and prepare it through a dry spraying-wet spinning process. The production process of lyocell fiber has no pollution to the environment, and it can be degraded naturally. It is called the revolutionary fiber and textile raw material in the 21st century. However, since the main raw material of lyocell fiber is cellulose, its flame retardant effect is very poor. Literature research found that there are many research reports on the flame retardant pro...

Claims

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Application Information

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IPC IPC(8): D01F2/00D01F1/07D01F11/02
CPCD01F1/07D01F2/00D01F11/02
Inventor 彭雄义梁永红殷国益王军粟斯伟董雄伟王强蔡映杰
Owner WUHAN TEXTILE UNIV
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