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Aftertreatment based preparation method for Lyocell cellulose fibers

A cellulose fiber and cellulose technology, applied in the direction of flame-retardant fiber, fiber treatment, plant fiber, etc., can solve the problems of toxic gas and corrosive gas, environmental pollution, etc., and achieve simple preparation process, high yield, The effect of broad industrial application prospects

Active Publication Date: 2019-01-08
山东天纤新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods use phosphorus-based flame retardants, which will produce toxic and corrosive gases during use, and may cause environmental pollution problems during production, application and disposal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Prepare the cellulose solution, followed by the following steps:

[0055] (1) Dissolving sodium alginate in the coagulation bath, the concentration of sodium alginate is 10% (w / v);

[0056] (2) extruding the cellulose solution through a spinneret, passing through an air gap to form a tow;

[0057] (3) Then the tow is pulled into a coagulation bath containing sodium alginate;

[0058] (4) Draw the tow from the coagulation bath, enter the aqueous solution containing calcium ions (concentration is 10g / L) to react, two dips and two rolling; control the distance between the tow from the coagulation bath and enter the aqueous solution containing calcium ions The time is 0.2min;

[0059] (5) Washing the tow, then cutting, refining, oiling, and drying to finally obtain flame-retardant cellulose fibers;

[0060] Wherein, the coagulation bath is NMMO / water mixed solution, wherein the concentration of NMMO is 10% (w / v), and the coagulation bath temperature is 20°C.

Embodiment 2

[0062] Prepare the cellulose solution, followed by the following steps:

[0063] (1) Dissolving sodium alginate in the coagulation bath, the concentration of sodium alginate is 10% (w / v);

[0064] (2) extruding the cellulose solution through a spinneret, passing through an air gap to form a tow;

[0065] (3) Then the tow is pulled into a coagulation bath containing sodium alginate;

[0066] (4) Draw the tow from the coagulation bath, enter the aqueous solution containing calcium ions (concentration is 15g / L) to react, two dips and two rolling; control the distance between the tow from the coagulation bath and enter the aqueous solution containing calcium ions The time is 0.6min;

[0067] (5) Washing the tow, then cutting, refining, oiling, and drying to finally obtain flame-retardant cellulose fibers;

[0068] Wherein, the coagulation bath is NMMO / water mixed solution, wherein the concentration of NMMO is 20% (w / v), and the temperature of the coagulation bath is 25°C.

Embodiment 3

[0070] Prepare the cellulose solution, followed by the following steps:

[0071] (1) Dissolving sodium alginate in the coagulation bath, the concentration of sodium alginate is 5% (w / v);

[0072] (2) extruding the cellulose solution through a spinneret, passing through an air gap to form a tow;

[0073] (3) Then the tow is pulled into a coagulation bath containing sodium alginate;

[0074] (4) Draw the tow from the coagulation bath, enter the aqueous solution containing calcium ions (concentration is 20g / L) to react, two dips and two rolling; control the distance between the tow from the coagulation bath and enter the aqueous solution containing calcium ions The time is 1min;

[0075] (5) Washing the tow, then cutting, refining, oiling, and drying to finally obtain flame-retardant cellulose fibers;

[0076] Wherein, the coagulation bath is NMMO / water mixed solution, wherein the concentration of NMMO is 15% (w / v), and the coagulation bath temperature is 30°C.

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Abstract

The invention provides an aftertreatment based preparation method for Lyocell cellulose fibers, and particularly belongs to the technical field of functional cellulose fibers. Soluble alginate is added to coagulation bath in the preparation process of the Lyocell cellulose fibers, and metal cations are then added in the water washing process for solidification. The pyrolysis process and combustioncharacteristics of cellulose are changed by the metal cations, so that the Lyocell cellulose fibers are endowed with superior flame retardant characteristic without basically changing performance indexes such as strength and elongation of the Lyocell cellulose fibers, and the Lyocell cellulose fibers have great industrial application prospect and practical application value.

Description

technical field [0001] The invention relates to the technical field of functional cellulose fibers, in particular to a method for preparing flame-retardant cellulose fibers based on a post-treatment method. Background technique [0002] According to the definition of BISFA (International Bureau of Standardization of Manmade Fibers), Lyocell fiber is defined as cellulose fiber obtained by organic solvent spinning process. Therefore, Lyocell is the general name of the fiber, and the internationally recognized abbreviation is "CLY". In that definition: [0003] 1) "Organic solvent" essentially means a mixture of organic compounds and water; [0004] 2) "Solvent spinning" means that no derivatives are produced during the dissolution and spinning process. [0005] The cellulose is dissolved in an organic solvent to prepare a 4-methylmorpholine-N-oxide (NMMO) / water solution with a cellulose concentration of about 10-18%, that is, a spinning dope. Then the spinning stock soluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/13D06M101/06
CPCD06M15/13D06M2101/06D06M2200/30
Inventor 王霞韩荣桓李玉波
Owner 山东天纤新材料有限公司
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