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Method for preparing flame resistance anti-thawing fibre spinning dope through solvent method

A technology of spinning stock solution and solvent method, which is applied in the field of preparation of fiber spinning stock solution, and can solve the problems that the quality of flame retardants cannot meet the spinning requirements, there is no industrial production, and the import price of flame retardants is high

Active Publication Date: 2010-02-17
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There was a climax in the research and development of flame-retardant and anti-melt fibers in China around 1990. Many enterprises, research institutes and universities participated in it. SandofLame5060 flame retardants were used, but due to the high import price of flame However, the quality of domestically produced flame retardants did not meet the requirements for spinning, and industrial production was not carried out in the end.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The bamboo fiber pulp with a polymerization degree of 300-1000 is crushed into bamboo cellulose powder, and the humidity is adjusted so that the moisture content reaches 2%, and the anion is Cl - 1. The aqueous solution of the ionic liquid whose cation is the substituent imidazole is evaporated under reduced pressure to make its water content reach 10%, and the bamboo cellulose powder after humidity adjustment and the aqueous ionic liquid solution are mixed with a weight ratio of 10:90 to prepare 60L solution; then 20kgSiO 2 Sodium silicate nonahydrate (Na 2 SiO 3 9H 2 (2), join in 60L dissolving solution, stir 60min at 70 ℃ and form light yellow paste, make total solid mass content be 9.55%, the viscose of sodium hydroxide mass content 7.24%, again through defoaming, dehydration 1. Filtration to obtain a 1.5D flame-retardant and anti-melt bamboo fiber spinning stock solution.

[0018] Afterwards, the spinning dope prepared above is spun to obtain 1.5D flame-retarda...

Embodiment 2

[0021] The bamboo fiber pulp with a degree of polymerization of 300-1000 is crushed into bamboo cellulose powder, adjusted to humidity, and the water content reaches 2%, and the aqueous solution of the ionic liquid whose anion is Br- and cation is substituent imidazole is concentrated under reduced pressure , so that its water content reaches 8%, the bamboo cellulose powder after humidity adjustment and the ionic liquid aqueous solution are mixed with a weight ratio of 20:90, and are made into 80L solution; after that, 10Kg SiO 2 Sodium silicate (Na 2 SiO 3 ), was added to 80L of dissolving solution, stirred at 85°C for 35min to form a light yellow paste, and the total solid mass content was 9.35%, and the viscose with a sodium hydroxide mass content of 6.26% was then defoamed, dehydrated, The 3.0D flame-retardant and anti-melt bamboo fiber spinning stock solution was obtained by filtration.

[0022] Afterwards, the spinning stock solution prepared above is spun to obtain 3....

Embodiment 3

[0025] The fiber pulp with a degree of polymerization of 300-1000 is crushed into bamboo cellulose powder, adjusted to humidity, and the water content reaches 2%, and the aqueous solution of the ionic liquid whose anion is Cl- and Br-, and the cation is the imidazole substituent is under reduced pressure. Evaporate to make its moisture content reach 9%, mix the cellulose powder after humidity adjustment and the ionic liquid aqueous solution with a weight ratio of 20:80, and make a 70L solution; then mix 10KgSiO 2 Sodium silicate (Na 2 SiO 3 ), was added to 70L of dissolving solution, and stirred at 100°C for 10min to form a light yellow paste to obtain a viscose with a total solid content of 9.45% and a sodium hydroxide mass content of 6.76%, which was then defoamed, dehydrated, Filtration to obtain the flame-retardant anti-melt fiber spinning stock solution.

[0026] Afterwards, the spinning dope prepared above is spun to obtain flame-retardant and melt-resistant fibers.

...

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Abstract

The invention discloses a method for preparing flame resistance anti-thawing fibre spinning dope through solvent method which is suitable for industrialized production. The method comprises the following steps: grinding fibre with the degree of polymerization of 300-1000, humidifying, then mixing the obtained material with ionic liquid water solution in a weight ratio of 10:90-20:80 evenly, addingsolving liquid with silicate to dissolve and mix, and then defoaming and filtrating to obtain flame resistance anti-thawing fibre spinning dope. When mixing cellulose powder with ionic liquid water solution, the materials are firstly sent to a tempering tank with an agitator for preliminary mixing and then to a double-screw extruder to mix at 70-100 DEG C for 10-60min. The technical solution of the invention is adopted so as to ensure that the production process of the flame resistance anti-thawing fibre spinning dope is easier and more environmentally friendly, improve the wet strength of regenerated cellulose material and reduce the energy consumption, thus being applicable to industrialized production.

Description

technical field [0001] The invention relates to the technical field of scribing, in particular to a method for preparing a fiber spinning dope. Background technique [0002] A large amount of NaOH, H 2 SO 4 and CS 2 , release H 2 S and other toxic gases and zinc-containing wastewater pollute the air and water and destroy the ecological environment. my country is the largest producer of viscose fiber in the world, and viscose fiber accounts for a large proportion in the world. In recent years, because countries all over the world attach great importance to environmental protection, the production of viscose fiber is currently mainly concentrated in some developing countries. On the one hand, many developed countries have strengthened the research on the treatment of pollution problems in the viscose process, and proposed to reduce the use of CS 2 On the other hand, it is also optimistic about the new technology of cellulose fiber, that is, the use of solvents to produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01F2/02
Inventor 刘建华马君志姜明亮卢海蛟吴亚红
Owner 潍坊欣龙生物材料有限公司
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