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A method of adding silicon-nitrogen flame retardant before spinning

A nitrogen-based flame retardant and technology of flame retardants are used in the field of adding silicon-nitrogen flame retardants before spinning, which can solve the problem of not being able to improve the reactivity of viscose well, and reduce labor intensity, reduce pollution, The effect of reducing the leakage of the tablet position

Inactive Publication Date: 2018-12-18
SOL FLAME RETARDANT FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the reaction efficiency of the combination of flame retardant and viscose can be improved, thereby overcoming the defect that conventional flame retardant additives and flame retardants can not be added together after mixing to improve the reactivity of viscose, thereby reducing the flame retardant in the adhesive. The loss rate in filtration and forming can improve the problem of spinning nozzle clogging and improve the spinnability of spinning forming

Method used

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  • A method of adding silicon-nitrogen flame retardant before spinning

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Experimental program
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Effect test

Embodiment 1

[0023] The composition is: the second glue with 8.5% of cellulose, 4.7% of alkali, viscosity of 45 seconds, and maturity of 12.2ml is adjusted to 20°C through a heat exchanger, and vinyl silane couple corresponding to 25% of silicon nitrogen flame retardant is first added. The joint agent, after being uniformly mixed by a static mixer, inject a silicon nitrogen flame retardant with a corresponding viscose methyl fiber content of 28% at a temperature of 20°C, and then enter the viscose mixer after being thoroughly mixed by a dynamic mixer and a static mixer. Among them, the silicon nitrogen flame retardant contains SiO 2 、TiO 2 , CaO and amides; wherein the ratio (molar ratio) of silicon, titanium and calcium is 5.4:2.7:7.0.

[0024] The temperature of the glue entering the viscose mixer was 22°C, and after mixing in the viscose mixer for 45 minutes, it was filtered to spin.

[0025] Spun gel composition: 9.6% methyl fiber, 6.5% alkali, viscosity 22 seconds, maturity 13.1ml. ...

Embodiment 2

[0037] The composition is: the second glue with 7.5% of cellulose, 5.5% of alkali, viscosity of 55 seconds, and maturity of 16ml is adjusted to 25°C through a heat exchanger, and polyethylene glycol corresponding to 28% of silicon nitrogen flame retardant is added. After the static mixer is mixed evenly, inject the silicon nitrogen flame retardant with a corresponding viscose methyl fiber content of 35% at a temperature of 20°C, and then enter the viscose mixer after being thoroughly mixed by a dynamic mixer and a static mixer. Among them, the silicon nitrogen flame retardant contains SiO 2 、TiO 2 , CaO and amides; wherein the ratio (molar ratio) of silicon, titanium and calcium is 6.7:3.5:9.2.

[0038] The temperature of the glue entering the viscose mixer was 27°C, and after mixing in the viscose mixer for 120 minutes, it was filtered to spin.

[0039] Spun gel composition: 9.2% methyl fiber, 7.0% alkali, viscosity 35 seconds, maturity 10.1ml.

[0040] The spinning speed is...

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Abstract

The invention discloses a method for adding a silicon-nitrogen-containing fire retardant before spinning. The method comprises the following steps: firstly adding a fire-retarding auxiliary agent into an adhesive and carrying out a mixing reaction; then adding a fire retardant and carrying out a mixing and combination reaction. The technical problems in the production of silicon-nitrogen-containing fire-retarding viscose that the replacement period of a nozzle is short and the loss rate of the fire retardant is relatively high in an acid bath forming process are solved. The combination reaction of the viscose and the fire retardant is improved, the loss rate of the fire retardant in an acid bath in the forming process is greatly reduced, the spinnability of the silicon-nitrogen-containing fire-retarding viscose is improved, the replacement period of the nozzle is prolonged, a working environment is improved, the labor efficiency is improved and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for adding a silicon-nitrogen flame retardant before spinning, which belongs to the field of textile products. Background technique [0002] An important link in the production of flame-retardant viscose fibers is to add flame retardants. In order to improve the spinnability of flame-retardant fibers and prolong the replacement cycle of nozzles, we have thought of many ways. From the initial addition of flame retardant only, and adding in the dissolving machine, a secondary rubber or different processes before spinning, and later adding various additives to the flame retardant, that is, various additives and flame retardants are used. The fuel is mixed and then added to the viscose, although some results have been achieved, the effect is not very satisfactory. Such as: CN101387013A discloses a manufacturing process of environmentally friendly flame-retardant viscose fiber, which is to process (mix) the flame retardant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/10
CPCD01F2/10
Inventor 胡金龙刘承修冉国庆
Owner SOL FLAME RETARDANT FIBER