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A kind of preparation method of non-water-soluble calcium silicate flame-retardant viscose fiber

A flame-retardant viscose fiber and non-water-soluble technology, which is applied in the field of preparation of water-insoluble metal silicate flame-retardant viscose fiber, can solve the difficulty of acid bath recovery in the production line, affect the physical properties of fibers, and unstable product quality, etc. problems, to avoid product strength, easy operation and control, and improve the uniformity of dispersion

Active Publication Date: 2015-09-09
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned flame retardant mechanism determines that there is inevitably the outstanding problem of excessive addition of inorganic flame retardants in this flame retardant viscose fiber product, which in turn directly affects the physical properties of the fibers; moreover, the amount of inorganic flame retardants added Too much, on the one hand, causes a large amount of inorganic flame retardants to adhere to the surface of the cortex of the fiber, the flame retardant effect is greatly reduced after spinning or fabrics, and the product quality is unstable; on the other hand, a large amount of inorganic flame retardants are solidified Entering the coagulation bath during the forming process will bring about a series of problems such as difficulty in recycling the acid bath in the production line and rising production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The addition of calcium silicate is 5% of the quality of flame-retardant viscose fiber;

[0036] The sulfuric acid content is 80 g / L, sodium sulfate 230 g / L, zinc sulfate 20 g / L, and the balance is water; the coagulation acid bath temperature is 10°C-50°C, and the coagulation time is 3 seconds;

[0037] Add 2.2 grams of calcium silicate to an appropriate amount of deionized water and disperse ultrasonically for 5 minutes to obtain a calcium silicate dispersion with a calcium silicate content of 20%, and add it to 500 grams of α-cellulose with a content of 8.35% (mass), in a viscose solution with a sodium hydroxide content of 5.8% (mass), at 10°C-40°C, fully stir for 1 hour, mix to obtain a viscose-calcium silicate dispersion, and then mix at 10°C-30°C At ℃, carry out vacuum defoaming treatment for 20 minutes, remove the gas contained in the dispersion liquid, and obtain viscose / CaSiO 3 Mixed spinning solution. Viscose / CaSiO 3 The mixed spinning solution is extruded i...

Embodiment 2

[0039] The addition of calcium silicate is 40% of the quality of flame-retardant viscose fiber;

[0040] The sulfuric acid content is 130 g / L, the sodium sulfate is 340 g / L, and the balance is water; the coagulation acid bath temperature is 10°C-50°C, and the coagulation time is 10 seconds;

[0041] Add 27.83 grams of calcium silicate to an appropriate amount of deionized water and disperse ultrasonically for 20 minutes to obtain a calcium silicate dispersion with a magnesium silicate content of 50%, and add it to 500 grams of α-cellulose with a content of 8.35% (mass) , in a viscose solution with a sodium hydroxide content of 5.8% (mass), at 10°C-40°C, fully stir for 1 hour, mix to obtain a viscose-calcium silicate dispersion, and then at 10°C-30°C, Carry out vacuum defoaming treatment for 20 minutes to remove the gas contained in the dispersion to obtain viscose / CaSiO 3 Mixed spinning solution. Viscose / CaSiO 3 The mixed spinning solution is extruded into the coagulation a...

Embodiment 3

[0043] The addition of calcium silicate is 32.6% of the mass of flame retardant viscose fiber;

[0044] The sulfuric acid content is 80 g / L, sodium sulfate 240 g / L, zinc sulfate 15 g / L, and the balance is water; the coagulation acid bath temperature is 10°C-50°C, and the coagulation time is 5 seconds;

[0045] Add 20.18 grams of calcium silicate to an appropriate amount of deionized water and disperse it ultrasonically for 20 minutes to obtain a calcium silicate dispersion with a calcium silicate content of 50%, and add it to 500 grams of α-cellulose with a content of 8.35% (mass) , in a viscose solution with a sodium hydroxide content of 5.8% (mass), at 10°C-40°C, fully stir for 1 hour, mix to obtain a viscose-calcium silicate dispersion, and then at 10°C-30°C, Carry out vacuum defoaming treatment for 20 minutes to remove the gas contained in the dispersion to obtain viscose / CaSiO 3 Mixed spinning solution. Viscose / CaSiO 3 The mixed spinning solution is extruded into the c...

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Abstract

The invention discloses a preparation method of water-insoluble calcium silicate flame-retardant viscose fibers. The preparation method comprises the steps of adding micron-scale calcium silicate powder of which the particle size is less than 5 microns into an appropriate amount of deionized water, and performing ultrasonic dispersion to prepare calcium silicate dispersion liquid; adding the prepared calcium silicate dispersion liquid which accounts for 5-40% of the mass of the flame-retardant viscose fibers into a viscose solution, and fully stirring; performing subsequent processes by adopting conventional technical means to finally prepare a flame-retardant viscose fiber product. In the flame-retardant viscose fibers disclosed by the invention, calcium metal ions play a major role in flame retardance. The preparation method of the water-insoluble calcium silicate flame-retardant viscose fibers, disclosed by the invention, is simple in process, easy to operate and control and relatively low in manufacturing cost; the flame-retardant viscose fibers prepared by adopting the method can achieve relatively good heat-resistant and flame-retardant effects, can not release poisonous gas when in use, and can not cause environmental pollution after being abandoned.

Description

technical field [0001] The invention relates to a method for preparing water-insoluble metal silicate flame-retardant viscose fiber, in particular to a method for preparing water-insoluble calcium silicate flame-retardant viscose fiber. Background technique [0002] In recent years, the mass construction of high-rise residences and hotels and the rapid development of various means of transportation have greatly promoted the development of flame-retardant fiber technology. Its application fields have also developed from military, industry, and fire protection to home textiles, vehicles, and decorative materials in public places. With the rapid development of the interior decoration industry and the continuous improvement of grades, curtains, carpets, fabric decorations, etc. have already been popularized from high-end places such as hotels to more and more home decorations. In recent years, fires caused by textiles have been increasing in countries all over the world. The r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/08D01F1/07D01D1/02D01D5/06
Inventor 夏延致纪全李春霞马晓梅宋翠翠全凤玉
Owner QINGDAO UNIV
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