Carboxyl group-containing beaten acrylonitrile-based fibers, production method for said fibers, and structure containing said fibers

An acrylonitrile-based, manufacturing method technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, fiber treatment, fiber type, etc., can solve the problems of poor shape stability, easy shrinkage, etc.

Active Publication Date: 2020-10-30
JAPAN EXLAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this characteristic also causes a side that tends to shrink due to heat

Method used

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  • Carboxyl group-containing beaten acrylonitrile-based fibers, production method for said fibers, and structure containing said fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] 90 parts of 44% sodium thiocyanate aqueous solution dissolved with 10 parts of acrylonitrile-based polymers containing 90% of acrylonitrile and 10% of methyl acrylate were spun out in a coagulation bath at -2.5°C for coagulation , washing with water, and stretching 12 times to obtain a gel-like acrylic fiber with a moisture content of 35%. The fibers were immersed in 1.5% aqueous sodium hydroxide solution, extruded, hydrolyzed at 123°C for 25 minutes in a hot and humid atmosphere, washed with water, and dried at 105°C for 1 hour to obtain unbeaten fibers. This unbeaten fiber is cut into 4mm, after forming the water slurry of concentration 1%, with Niagara beater (BE-23 manufactured by Kumagai Riki Industry Co., Ltd.), carry out beating process with the beating time recorded in Table 1 with a weight of 2 kg, The beaten acrylic fiber of Example 1 was obtained. In addition, the freeness of the unbeaten fiber cut into 4 mm was 760 ml.

Embodiment 2～5

[0088] In the formulation of Example 1, the concentration of the aqueous sodium hydroxide solution was changed to 4.0%, and the beating treatment was carried out with the beating time recorded in Table 1, except that the beating-like acrylonitrile of Examples 2 to 5 was obtained in the same manner. Department of fiber.

Embodiment 6～8

[0090] In the formula of embodiment 1, for the concentration of aqueous sodium hydroxide solution, change to 7.5% in embodiment 6, change to 10.0% in embodiment 7, change to 20.0% in embodiment 8, and with the beating described in table 1 Except that the beating treatment was performed over a period of time, the beaten acrylic fibers of Examples 6 to 8 were obtained in the same manner.

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Abstract

[Problem] Beaten acrylonitrile-based fibers having a carboxyl group, have a high water-swellable property, and therefore are considered to have an advantage in terms of powder catching ability. However, this property also leads to an aspect of easily being shrunk when heated or dried, disadvantageously resulting in poor shape stability during processing. The purpose of the present invention is toprovide carboxyl group-containing beaten acrylonitrile-based fibers having excellent shape stability. [Solution] Beaten acrylonitrile-based fibers according to the present invention comprise a polymerhaving a carboxyl group content of 0.2-4.0 mmol/g but substantially not having a crosslinked structure formed by a covalent bond, and is characterized in that the shrinkage rate thereof is 25% or less when formed in the shape of paper having a basis weight of 50 g/m2.

Description

technical field [0001] The present invention relates to a carboxyl group-containing beaten acrylic fiber, a method for producing the fiber, and a structure containing the fiber. Background technique [0002] Pulp-like fibers are characterized by a multi-branched structure and a high specific surface area, and are excellent in adhesion and capture of functional particles such as activated carbon. applied in various fields. [0003] The beating of acrylic fibers has also been studied, and Patent Document 1 reports that beating acrylic fibers having a carboxyl group as a raw material yields beating acrylic fibers having a high degree of adhesiveness. [0004] In addition to the above-mentioned adhesion and capture of functional particles, this fiber also exhibits functions such as easy dispersibility, ion adsorption, hygroscopicity, and deodorization due to its carboxyl group, and it can be expected to be used in various applications. application. [0005] prior art literatu...

Claims

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Application Information

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IPC IPC(8): D06M11/00D06M11/84D21H13/18D06M101/28
CPCD06M11/84D06M11/00D21H13/18Y02E60/50
Inventor 小见山拓三水谷健太
Owner JAPAN EXLAN CO LTD
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