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Easily dyeable meta-form wholly aromatic polyamide fiber

A polyamide fiber and fully aromatic technology, which is applied in the field of dyeable meta-type fully aromatic polyamide fiber, can solve the problems of difficulty in obtaining acid resistance and insufficient fiber crystallization, and achieve excellent environmental stability and dyeability Good, excellent acid resistance

Active Publication Date: 2011-08-24
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the micropores are destroyed by heating with steam heated to a temperature of 110°C to 140°C, the crystallization of the fibers is insufficient, and it is difficult to obtain good acid resistance.

Method used

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  • Easily dyeable meta-form wholly aromatic polyamide fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] [Spinning solution preparation process]

[0111] 20.0 parts by mass of polym-phenylene isophthalamide powder with an intrinsic viscosity (I.V.) of 1.9 produced by the interfacial polymerization method based on the method described in Japanese Patent Publication No. 47-10863, after cooling to - It was suspended in 80.0 parts by mass of N-methyl-2-pyrrolidone (NMP) at 10° C. to obtain a slurry. Next, the temperature of the suspension was raised to 60° C. and dissolved to obtain a transparent polymer solution A.

[0112] [Spinning and coagulation process]

[0113] The above-mentioned polymer solution A was used as a spinning stock solution, and it was sprayed from a spinning nozzle with a hole diameter of 0.07 mm and a number of holes of 500 into a coagulation bath with a bath temperature of 30° C. for spinning. The composition of the coagulation liquid was water / NMP=45 / 55 (parts by mass), and it was sprayed into the coagulation bath at a wire speed of 7 m / min, and spun....

Embodiment 2

[0127] [Spinning solution preparation process]

[0128] 854.8 parts of N-methyl-2-pyrrolidone (hereinafter, abbreviated as NMP) was charged into a reaction container equipped with a stirring device and a raw material inlet, and 83.4 parts of m-phenylenediamine (hereinafter, abbreviated as MPDA) were dissolved in the NMP. Furthermore, 156.9 parts of isophthalic acid chlorides (it abbreviates as IPC hereafter) were slowly added to this solution, stirring, and it reacted. After the stirring was continued for 40 minutes from the start of the reaction, 57.1 parts of calcium hydroxide powder was added, and the reaction was completed after further stirring for 40 minutes. When the polymerization solution was taken out from the reaction vessel, the polymerization solution was transparent and the polymer concentration was 16%.

[0129] [Spinning and coagulation process, plastic drawing bath stretching process, cleaning process, steam relaxation heat treatment process, dry heat treatme...

Embodiment 3

[0138] [production of fibril]

[0139] A polym-phenylene isophthalamide fiber was obtained in the same manner as in Example 2, except that the draw ratio in the plastic drawing bath was set to 4.5 times, and the surface temperature in the dry heat treatment step was set to 280°C.

[0140] [Physical properties of fibrils]

[0141] The physical properties of the obtained fiber were a fineness of 1.7 dtex, a breaking strength of 3.6 cN / dtex, a breaking elongation of 36.1%, and a residual solvent amount of 0.06% by mass. Table 1 shows the physical properties of the obtained fibers.

[0142] [dyeing process]

[0143] The same dyeing process as in Example 1 was performed on the obtained fiber.

[0144] [Physical properties of dyed fiber, etc.]

[0145] The dyeing rate was 91.5%, showing good dyeability. In addition, the breaking strength of the dyed fiber was 3.5 cN / dtex, and the breaking strength of the dyed fiber after the acid resistance test was 2.5 cN / dtex, and the strengt...

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Abstract

An easily dyeable meta-form wholly aromatic polyamide fiber is provided which has excellent dyeability and excellent acid resistance and is extremely reduced in the content of a residual solvent. The components of a coagulating bath or conditions are suitably controlled so as to result in a coagulated form having no skin core. The resultant fiber is stretched in a plastic state at a specific stretch ratio. After a cleaning step, a dry heat treatment is conducted at a specific temperature.

Description

technical field [0001] The present invention relates to a dyeable meta-type wholly aromatic polyamide fiber. In more detail, it relates to an easily dyeable wholly aromatic meta-aramid fiber which is excellent in environmental safety and acid resistance. Background technique [0002] Meta-type wholly aromatic polyamide fibers such as polym-phenylene terephthalamide fibers exhibit excellent heat resistance and dimensional stability because their molecular backbone is almost composed of aromatic rings. Taking advantage of these characteristics, meta-type wholly aromatic polyamide fibers are well used not only in industrial applications, but also in applications where heat resistance, fire resistance, and fire resistance are emphasized. Recently, the use of fire resistance and Applications in fields such as fire-resistant bedding, clothing, and interior decoration are rapidly expanding. Furthermore, particularly in the field of clothing materials, dyeability and acid resistan...

Claims

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Application Information

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IPC IPC(8): D01F6/60
CPCD01F6/605D01F6/00D01F6/60
Inventor 山内裕辅泷上康太郎
Owner TEIJIN LTD
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