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Preparation method for flame-retardant spinning viscose

A technology for spinning viscose and viscose, which is applied in the field of preparation of flame retardant spun viscose, can solve the problems of uneven mixing of flame retardants in the flame retardant viscose, poor spinnability, and difficulty in operation, etc. Stable spinnability, guaranteed dispersion uniformity, easy operation

Active Publication Date: 2012-02-08
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

[0003] At present, the method for preparing flame-retardant viscose is mainly the pre-spinning blending method, that is, adding a flame retardant to the spinning dope with special equipment before spinning to prepare flame-retardant viscose fiber, but this method is used to prepare Flame retardant viscose is not easy to operate, and the flame retardant in the flame retardant viscose is not mixed uniformly, resulting in poor spinnability, and it is necessary to add pre-spinning equipment, which increases the investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add sodium metasilicate pentahydrate into the dissolved viscose solution, and stir evenly to prepare a flame retardant solution with an effective flame retardant concentration of 4.5 wt%.

[0018] Using cotton pulp as raw material, the cellulose xanthate viscose is prepared through steps including dipping, pressing, crushing, aging and yellowing.

[0019] Add the prepared flame retardant solution into the cellulose xanthate viscose, mix and stir to dissolve, and filter, mature, and defoam to obtain a cellulose content of 9.06wt%. The effective content of sodium hydroxide is 30.8wt%, the sodium hydroxide content is 7.23wt%, the viscosity measured by the falling ball method is 32s, and 10%NH 4 The degree of maturity measured by Cl is 25ml flame retardant spun viscose.

Embodiment 2

[0021] Add anhydrous sodium metasilicate to the dissolved viscose solution, and stir evenly to prepare a flame retardant solution with an effective flame retardant concentration of 4.8 wt%.

[0022] Using wood pulp as raw material, the cellulose xanthate viscose is prepared through steps including dipping, pressing, crushing, aging and yellowing.

[0023] Add the prepared flame retardant solution into the cellulose xanthate viscose, mix and stir to dissolve, and filter, ripen, and defoam to obtain a cellulose content of 9.8wt%. The effective content of sodium hydroxide is 31.2wt%, the sodium hydroxide content is 7.84wt%, the viscosity measured by the falling ball method is 35s, and 10%NH 4 The degree of ripeness measured by Cl is 22ml of flame-retardant spun viscose.

Embodiment 3

[0025] Add anhydrous sodium metasilicate to the dissolved viscose solution, and stir evenly to prepare a flame retardant solution with an effective flame retardant concentration of 8.2 wt%.

[0026] Using cotton pulp as raw material, the cellulose xanthate viscose is prepared through steps including dipping, pressing, crushing, aging and yellowing.

[0027] Add the prepared flame retardant solution into the cellulose xanthate viscose, mix and stir to dissolve, and filter, ripen, and defoam to obtain a cellulose content of 10.06wt%. The effective content of sodium hydroxide is 34.5wt%, the sodium hydroxide content is 8.04wt%, the viscosity measured by the falling ball method is 36s, and 10%NH 4 Flame-retardant spun viscose with a maturity of 20ml measured by Cl.

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Abstract

The invention discloses a preparation method for flame-retardant spinning viscose. The preparation method comprises the following steps of: adding a sodium metasilicate type flame retardant into a dissolved viscose solution; stirring to prepare a flame retardant dissolving solution with effective flame retardant concentration of 4-10 percent by weight; adding the flame retardant dissolving solution into yellowed cellulose xanthate viscose to be mixed, stirred and dissolved; filtering, ripening and defoaming to prepare flame-retardant spinning viscose with alpha cellulose content of 8.0-12 percent by weight, effective content of effective flame retardant relative to the alpha cellulose of 30-40 percent by weight, alkali content of 7.0-10.0 percent by weight, viscosity of 30-50s determined by a falling ball method and ripening degree of 15-30ml determined by 10 percent NH4Cl. The preparation method for the flame-retardant spinning viscose is simple, and easy to operate and has high filterability and spinnability; and compared with other (such as phosphorus series) flame-retardant viscoses, the flame-retardant spinning viscose has greatly-reduced cost.

Description

technical field [0001] The invention relates to the preparation technology of cellulose viscose, in particular to a preparation method of flame-retardant spinning viscose. Background technique [0002] With the gradual improvement of people's consumption level, the demand for fiber and its products is increasing day by day, and its application scope has also developed from people's daily life to industry, transportation, military and many other fields. The fire caused by the burning of fiber products has become one of the major disasters in modern society. The results of the investigation of fatal accidents caused by fire show that fires caused by interior decorations and textiles occupy the first place. In order to prevent fires, flame retardant The application of fibers and their products has attracted more and more attention. At present, many countries in the world have put forward specific requirements or restrictions on the combustion performance of fibers and their pr...

Claims

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Application Information

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IPC IPC(8): D01F2/10C08B9/00
Inventor 张志鸿刘建华吴亚红姜明亮李昌垒秦翠梅郝连庆
Owner 潍坊欣龙生物材料有限公司
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