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Highly flame-retardant and hygroscopic fiber and fiber structure

A technology with hygroscopicity and high flame retardancy, which is applied in the field of fibers and fiber structures, can solve problems such as insufficient flame retardancy, and achieve the effects of low cost, high hygroscopicity, and high safety

Active Publication Date: 2007-08-22
JAPAN EXLAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to solve the safety and environmental problems existing in the above-mentioned conventional flame-retardant fibers or flame-retardant fiber structures, and to solve the problem that the flame-retardant level of the conventional flame-retardant fibers is insufficient , and further provide a highly flame-retardant hygroscopic fiber and a fiber structure having high hygroscopicity that can be used flexibly in clothing materials, building materials, and bedroom decorations.
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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Dissolve the acrylonitrile polymer with 90% acrylonitrile and 10% methyl acrylate with 48% aqueous solution of sodium thiocyanate to make a spinning dope, and perform spinning, washing, stretching, crimping, and heat treatment according to conventional methods. A raw material fiber of 0.9 (dtex) x 70 (mm) was obtained. 5 kg of 30% by weight of hydrazine hydrate was added to 1 kg of the raw material fiber, and a cross-linking treatment was performed at 98° C. for 3 hours. After the cross-linked fiber was washed with water, 9 kg of 3% by weight sodium hydroxide was added and hydrolyzed at 92° C. for 5 hours. Then, with 1 equivalent of HNO 3 The aqueous solution is treated, and the carboxyl group is transformed into H type. After washing with water, adjust the pH to 12 with 1 equivalent of NaOH, and wash with water to obtain fibers with sodium salt type carboxyl groups. Then, add 8 kg of 10% magnesium nitrate aqueous solution, spend 2 hours at 60° C. to convert to the ma...

Embodiment 2

[0123] Before hydrolysis, the same method as in Example 1 was used to obtain crosslinked fibers having sodium salt type carboxyl groups. Then, the hydrolyzed fiber was washed with water, 8 kg of a 10% magnesium nitrate aqueous solution was added thereto, and a conversion treatment to the magnesium type was performed at 60° C. for 2 hours. After fully washing with water, dehydration, oil treatment and drying are carried out to obtain the highly flame-retardant hygroscopic fiber of the present invention. As shown in Table 1, the evaluation results of the obtained fiber had characteristics of LOI: 42, saturated moisture absorption rate of 40%, and excellent flame retardancy and moisture absorption. In particular, compared with Example 1, it can be confirmed that the total amount of carboxyl groups is the same, but the proportion of magnesium-type carboxyl groups is increased, the magnesium content is increased, and the LOI is sharply increased.

Embodiment 3

[0125]The highly flame-retardant hygroscopic fiber of the present invention was obtained in the same manner as in Example 1, except that 8 kg of the 10% magnesium nitrate aqueous solution was reduced to 3 kg during the conversion to the magnesium type. As shown in Table 1, the evaluation results of the obtained fiber had characteristics of LOI: 36, saturated moisture absorption rate of 47%, and excellent flame retardancy and moisture absorption. In particular, compared with Example 1, the total amount of carboxyl groups was the same, but the proportion of magnesium-type carboxyl groups was lowered, and as a result of the lower magnesium content, compared with Example 1, the LOI was a slightly lower value. However, as another salt-type carboxyl group, there was almost no sodium salt type, and a result of high hygroscopic performance was obtained.

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Abstract

A crosslinked acrylic fiber which has high saturated moisture absorption and which slowly absorbs moisture and is excellent in the persistence of hygroscopically heat-generating performance. Namely, a slowly moisture-absorbing and -releasing crosslinked acrylic fiber which is a moisture-absorbing and -releasing crosslinked acrylic fiber having a crosslinked structure and salt-type carboxyl groups and characterized by satisfying the following relationships (1) to (3): a (%) <u.

Description

technical field [0001] The present invention relates to fibers and fiber structures with high flame retardancy and high hygroscopicity. More specifically, it relates to no harmful gases such as hydrogen halide gas being generated during combustion, and no heavy metal compounds even if buried in waste including incineration treatment. Dissolution of phosphorus compounds, high flame retardant hygroscopic fiber and fiber structure with excellent processability. Background technique [0002] In the past, a variety of methods for preparing flame-retardant fibers have been proposed. One of the methods is the post-processing method of attaching and fixing flame retardants such as phosphorus compounds and halides to the surface of the fibers. Flame retardant, it is difficult to obtain high flame retardant fibers, and there are various defects such as durability, quality style change, flame retardant itself and toxicity during combustion. [0003] In addition, as other representativ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/63D06M11/65D06M101/28
CPCD06M11/63D06M2101/28D06M2200/00D06M11/65
Inventor 家野正雄西田良祐
Owner JAPAN EXLAN CO LTD
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