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Black high wet absorption and discharging fibre

A highly absorbent, fibrous technology, applied in the direction of fiber type, fiber treatment, fiber chemical characteristics, etc.

Inactive Publication Date: 2003-04-09
JAPAN EXLAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contents of the invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 10 parts of AN polymer (intrinsic viscosity [η] in dimethylformamide at 30°C: 1.2) formed of 90% by weight of AN and 10% by weight of methyl acrylate (hereinafter referred to as MA) was dissolved in In 90 parts of 48% sodium thiocyanate aqueous solution, a spinning dope was prepared, and 0.2 part of Mitsubishi Chemical Co., Ltd. carbon black 50 was mixed therein. # (The surface area measured by the BET method is 103m 2 / g, DBP oil absorption is 65ml / 100g), according to the well-known wet spinning method, after spinning, cold / hot drawing (total draw ratio 10 times), at dry bulb / wet bulb=120°C / 60°C After drying and densification in an atmosphere of high humidity, heat treatment is carried out to make the total shrinkage rate reach 25%. A raw material fiber having a monofilament fineness of 1.5 dtex was obtained.

[0050] The raw material fiber was cross-linked at 98° C. for 5 hours with a 20% by weight aqueous solution of hydrazine hydrate. After this treatment, a cross...

Embodiment 2、3

[0052] Except that the reduction treatment was omitted, caustic potash was used to adjust the ratio of H / metal salt, all the others were the same as in Example 1, and the black high hygroscopic fiber of Example 2 was obtained. In addition, in Example 3, the fiber of Example 1 was treated with an aqueous calcium chloride solution to change Na-type carboxyl groups into Ca-type carboxyl groups. The properties of these fibers are also listed in Table 1. In addition, in Comparative Examples 1 and 2, 0.04 and 0.6 parts of Mitsubishi Chemical Co., Ltd. carbon black 50 were mixed into the spinning dope of Example 1. # Other than that, the rest were hygroscopic fibers prepared in the same way as in Example 1. Comparative example 3

Embodiment 4～8

[0057] The black high hygroscopic fiber of Example 1 has good performance, the moisture absorption rate is 39%, the fiber strength is 1.3cN / dtex, the elongation is 60%, and the blackness L value is 13. In addition, the washing fastness was grade 4 to 5, and the black stability was excellent. In Example 3, which has a different metal salt type from Example 1, and in Example 2, which omits the reduction treatment, compared with Example 1, the moisture absorption rate is somewhat lower, while the blackness and color stability are similar to those in Example 1. . Example 4 with nitrogen increase of 0.5% by weight and carboxyl group content of 8 meq / g has good blackness, but since its strength is at the lower limit of machinability and its swelling property to water is high, it should be used with caution. In addition, Example 8, in which the increase of nitrogen was 12% by weight and the amount of carboxyl groups was 3.8meq / g, had good fiber strength and blackness, and sli...

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PUM

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Abstract

To provide a highly moisture-absorbing / desorbing black fiber having excellent processability and more excellent blackness stability than conventional fibers, while having moisture-absorbing / desorbing properties, heat-generating properties due to moisture absorption, and light-to-heat converting properties. SOLUTION: This highly moisture-absorbing / desorbing black fiber is made of a carbon black-containing acrylic fiber into which cross-links are introduced by using a hydrazine-based compound and carboxylic groups are introduced by being hydrolyzed and, if necessary, of which the ratio of protons of the carboxylic groups to metal salts is controlled, so that the fiber has a saturated moisture absorption rate of >=10 wt.%, a dry strength of >=0.8 cN / dtex, and a lightness (L-value) of <=35.

Description

technical field [0001] This invention relates to black fibers with high moisture absorption and release properties. More specifically, the black fiber with high hygroscopicity and desorption properties not only has moisture absorption and desorption properties, moisture absorption and heat generation properties, and light-to-heat conversion properties, but also has sufficient strength and elongation characteristics, so it is excellent in processability, and is superior to existing products. The blackness is further improved, and even after repeated washing, the blackness stability is still excellent. Background technique [0002] It is known that conventional acrylic fibers are hygroscopic fibers in which metal salt-type carboxyl groups are introduced by cross-linking and hydrolysis of hydrazine compounds and by salinization, and the color tone is light peach to light brown. In addition, although this hygroscopic fiber can be dyed with cationic dyes, however, due to the wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/00D01F6/36D01F6/54D06M11/38D06M11/63D06M11/64D06M13/332D06M13/338D06M23/00D06M101/28
CPCB60Q1/0041B60Q1/04H01J61/00
Inventor 中岛茂
Owner JAPAN EXLAN CO LTD
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