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Flameproof rayon fiber, method for manufacturing the same and flameproof fiber structure

A rayon fiber and flame-resistant technology, which is applied in the field of flame-resistant fiber structures, can solve problems such as complicated operations, and achieve excellent flame-resistant performance and excellent self-extinguishing properties

Active Publication Date: 2013-06-19
DAIWABO RAYON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the flame-resistant rayon of Patent Document 3, the operation of Mg processing may become complicated.

Method used

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  • Flameproof rayon fiber, method for manufacturing the same and flameproof fiber structure
  • Flameproof rayon fiber, method for manufacturing the same and flameproof fiber structure
  • Flameproof rayon fiber, method for manufacturing the same and flameproof fiber structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Manufacture of viscose

[0051] A viscose collagen solution containing 8.5% by mass of cellulose, 5.7% by mass of sodium hydroxide, and 2.6% by mass of carbon disulfide was prepared. Then, add the mixed solution of No. 3 sodium silicate, sodium hydroxide and water to the viscose collagen solution made, adjust the composition of the viscose solution to 7.2% by mass of cellulose, 7.4% by mass of sodium hydroxide, and obtain the added Sodium silicate viscose. The addition rate of sodium silicate is converted into SiO 2 It is calculated as 50% by mass relative to the cellulose mass.

[0052] (2) spinning

[0053] The above-mentioned viscose solution added with sodium silicate was spun by a two-bath stretch spinning method at a spinning speed of 50 m / min and a draw ratio of 50%, to obtain fibers with a fineness of about 3.3 dtex. The composition of the first bath (spinning bath) was 115 g / liter of sulfuric acid, 15 g / liter of zinc sulfate, and 350 g / liter of sodium s...

Embodiment 2

[0059] In the post-processing, as a sodium-based buffer, an aqueous solution containing 0.34% by mass of sodium sulfate and 0.1% by mass of sodium bicarbonate (bath temperature: 50°C, pH: 7.79) was used, except that it was the same as in Example 1. Operation, the flame-resistant rayon fiber c (hereinafter referred to as fiber c) of Example 2 was produced.

Embodiment 3

[0061] In the post-processing, as a sodium-based buffer, an aqueous solution containing 0.17% by mass of sodium sulfate and 0.3% by mass of sodium bicarbonate (bath temperature: 50° C., pH: 7.93) was used, except that it was the same as in Example 1. Operation, the flame-resistant rayon fiber d of Example 3 (hereinafter referred to as fiber d) was produced.

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Abstract

A flameproof rayon fiber having excellent flameproofness as well as excellent flame retardance, a method for manufacturing the same, and a flameproof fiber structure are provided. The flameproof rayon fiber according to the present invention includes components of silicon and sodium. Glass remains when the fiber is burned at 800°C, the glass component has a property of softening at 800°C, and when subjected to an X-ray fluorescence analysis, the rayon fiber has a silicon content in the range of 5 to 30% by mass and a sodium content in the range of 0.1 to 3% by mass. The flameproof rayon fiber according to the present invention can be manufactured by preparing an undiluted viscose solution; adding a solution containing a silicate compound containing an alkali metal to the undiluted viscose solution so as to make an alkali metal-containing silicate compound-added viscose solution; performing spinning by extruding the alkali metal-containing silicate compound-added viscose solution through a spinneret into a spinbath containing sulfuric acid, thus producing a fiber to be treated containing the silicate compound; and treating, in a scouring or aftertreatment process, the fiber to be treated with a solution having a pH in the range of 4 to 11 and a buffer action and containing sodium. A flameproof fiber structure of the present invention contains at least 30% by mass of the flameproof rayon fiber.

Description

technical field [0001] The present invention relates to a flame-resistant rayon fiber, a method for producing the same, and a flame-resistant fiber structure. Background technique [0002] Conventionally, for cellulose fibers having flame retardancy and methods for producing them, many studies have been conducted to enhance flame retardancy by promoting carbonization. In addition, recently, as a cellulose fiber with flame resistance, it has been proposed to combine cellulose and glass by using the spinning technology of viscose rayon, so that even if the cellulose is decomposed, the glass will remain. Several techniques to stop combustion. For example, Patent Document 1 proposes to mix viscose with sodium silicate and spin in a bath containing sulfuric acid to fibrillate conjugate fibers. Patent Document 2 proposes to mix sodium silicate in viscose and use sodium aluminate in the refining process to obtain aluminum-containing cellulose fibers. Patent Document 3 proposes m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/10
CPCD01F2/10Y10T428/2913
Inventor 伏谷重雄林诚
Owner DAIWABO RAYON
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