Flame-retardant viscose fiber and preparation method thereof

A flame-retardant viscose fiber and cellulose technology, which is applied in the preparation of spinning solution, artificial filament made of viscose, wet spinning method, etc., can solve the problem of unsatisfactory high temperature resistance and flame-retardant viscose fiber Large size, poor alkali resistance of fabrics and poor textile processing performance

Inactive Publication Date: 2012-06-20
阜宁澳洋科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the flame retardants used in viscose fibers, they are mainly divided into two categories: phosphoric acid flame retardants containing phosphorus, nitrogen, and sulfur flame retardant elements and inorganic silicon flame retardants, but no matter which flame retardant is used Flame-retardant viscose fiber has unsatisfactory high temperature resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Cotton pulp is used as raw material to prepare alkali cellulose through impregnation, pressing, crushing, aging and other processes. The alkali cellulose is yellowed, and the prepared sodium metasilicate and pyrophosphate solutions are added to the In the cellulose xanthate after alkali cellulose yellowing, the addition amount of sodium metasilicate solution is according to SiO 2 Calculate, be the 32wt% of methyl fiber in the cellulose viscose, the addition of pyrophosphonate is the 11wt% of the methyl fiber in the cellulose viscose; The cellulose sulfonate and sodium metasilicate and pyrophosphate solution are fully Mix evenly, after the steps of dissolving, filtering, ripening and degassing to prepare the flame retardant spinning viscose solution, solidify and form in the coagulation bath, the concentration of sulfuric acid in the coagulation bath is 106g / L, the concentration of zinc sulfate is 15g / L, sulfuric acid The sodium concentration is 340g / L, the temperature o...

Embodiment 2

[0033] Cotton pulp is used as raw material to prepare alkali cellulose through impregnation, pressing, crushing, aging and other processes. The alkali cellulose is yellowed, and the prepared sodium metasilicate and pyrophosphate solutions are added to the In the cellulose xanthate after alkali cellulose yellowing, the addition amount of sodium metasilicate solution is according to SiO 2Calculated, it is 55wt% of methyl fiber in cellulose viscose, and the addition of pyrophosphonate is 2.2wt% of methyl fiber in cellulose viscose; Fully mix evenly, after dissolving, filtering, ripening and degassing steps to prepare the flame retardant spinning viscose solution, solidify and form in the coagulation bath, the concentration of sulfuric acid in the coagulation bath is 126g / L, the concentration of zinc sulfate is 35g / L, The concentration of sodium sulfate is 340g / L, the temperature of the coagulation bath is 55°C, and then after the post-treatment steps of plasticizing and drawing, ...

Embodiment 3

[0035] Using cotton pulp as raw material, alkali cellulose is prepared by dipping, pressing, crushing, aging and other processes, the alkali cellulose is yellowed, and the prepared sodium metasilicate and dissolved water are added to the alkali cellulose yellowing In the final cellulose xanthate, the cellulose sulfonate and sodium metasilicate are fully mixed evenly, and after the steps of dissolving, filtering, aging, and defoaming, the pyrophosphate solution is added by pre-spinning injection before spinning, and Mix evenly, after preparing the flame retardant spinning viscose solution, the amount of sodium metasilicate solution is based on SiO 2 Calculate, be the 32wt% of methyl fiber in the cellulose viscose, the add-on of pyrophosphonate is the 11wt% of the methyl fiber in the cellulose viscose; Solidification molding in the coagulation bath, sulfuric acid concentration is 116g / L in the coagulation bath, The concentration of zinc sulfate is 15g / L, the concentration of sod...

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Abstract

The invention discloses flame-retardant viscose fiber and a preparation method thereof. The flame-retardant viscose fiber mainly comprises the following components in percentage by weight: 20 to 55 percent of polysilicic acid (based on SiO2), 0.5 to 10 percent of pyrophosphoric acid ester and 40 to 70 percent of cellulose. The preparation method comprises the following steps of: (1) adding a solution of sodium metasilicate and a solution of pyrophosphoric acid ester into a yellowed cellulose viscose solution respectively, and uniformly mixing the sodium metasilicate, the pyrophosphoric acid ester and cellulose viscose to obtain a flame-retardant spinning viscose solution; (2) performing spinning molding on the flame-retardant spinning viscose solution in coagulating bath containing sulfuric acid, zinc sulfate and sodium sulfate to obtain as-spun fiber; and (3) after-treating the as-spun fiber, namely washing, desulfurizing, applying oil and drying to obtain the flame-retardant viscose fiber. The synergistic effect of silicon and phosphorus flame retardants greatly improves the flame-retardant effect and high temperature resistance of flame-retardant fiber and the textile processing performance of fabrics.

Description

technical field [0001] The invention relates to the technical field of cellulose viscose fiber, in particular to a flame-retardant viscose fiber and a preparation method thereof. Background technique [0002] The products researched on flame-retardant viscose fiber at home and abroad mainly include: Viscosa FR flame-retardant viscose fiber from Lenzing Company in Austria, which is a phosphoric acid flame retardant that adds phosphorus and nitrogen flame-retardant elements to the pre-spinning stock solution; Kemira Company from Finland Visil fiber; the product name of flame-retardant viscose fiber developed by Hoechest Company in Germany is Danufi L; Japan Asahi Kasei Company uses one or more cyclic and linear compounds as flame retardants, according to the amount of fiber 10~ 40wt% is added to the viscose liquid to obtain a flame-retardant viscose fiber with long-lasting washability. It has good hygroscopicity and dyeability, and is suitable for blending with other fibers to...

Claims

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Application Information

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IPC IPC(8): D01F2/08D01D1/02D01D5/06
Inventor 迟健叶荣明赵望春刘海洋王可龚玮超
Owner 阜宁澳洋科技有限责任公司
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