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Heterocyclic ring-containing aromatic polyamide fiber, method for producing the same, fabric comprising the fiber, fiber-reinforced composite material reinforced with the fiber

A polyamide fiber and heterocyclic aromatic technology, which is applied in the field of fiber-reinforced composite materials, can solve the problems of high fiber prices, expensive cloth and clothing materials, etc.

Inactive Publication Date: 2009-12-23
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is true that flame retardancy can be improved by using this fiber, but the price of this fiber is very high, resulting in the problem that fabrics and clothing made of this fiber become very expensive

Method used

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  • Heterocyclic ring-containing aromatic polyamide fiber, method for producing the same, fabric comprising the fiber, fiber-reinforced composite material reinforced with the fiber
  • Heterocyclic ring-containing aromatic polyamide fiber, method for producing the same, fabric comprising the fiber, fiber-reinforced composite material reinforced with the fiber
  • Heterocyclic ring-containing aromatic polyamide fiber, method for producing the same, fabric comprising the fiber, fiber-reinforced composite material reinforced with the fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] [Preparation of heterocyclic aromatic polyamide]

[0136] 1.940 L of N-methyl-2-pyrrolidone (NMP) was added to a stirring tank equipped with stirring blades through which nitrogen gas was circulated, and 60.0 g of sufficiently dried calcium chloride was added and dissolved. Next, weigh 11.0g (30%mol) p-phenylenediamine (PPD) and 53.0g (70%mol) 5(6)-amino-2-(4-aminophenyl)benzimidazole (DAPBI), respectively Add, dissolve. Next, a heterocyclic aromatic polyamide solution was obtained by adding 68.6 g (100% mol) of terephthaloyl chloride (TDC) for reaction. To the obtained heterocyclic aromatic polyamide solution, 110.0 g of an NMP dispersion containing 22.5% by mass of potassium hydroxide was added to carry out a neutralization reaction.

[0137] Heterocyclic aromatic polyamide was precipitated from the polyamide solution obtained after the neutralization reaction, and its intrinsic viscosity (ηinh) was determined to be 5.5.

[0138] [Spinning process]

[0139] The he...

Embodiment 2-3、 comparative example 1-4

[0147] [Preparation of Heterocyclic Aramid Fiber]

[0148] A heterocyclic ring-containing aromatic polyamide was prepared in the same manner as in Example 1, and a heterocyclic ring-containing aromatic polyamide fiber was obtained in the same manner as in Example 1 except that the heat treatment conditions were as shown in Table 1. Various measurements were performed on the obtained heterocyclic ring-containing aramid fiber in the same manner as in Example 1. The results are shown in Table 1.

[0149] Table 1

[0150] Example 1

Example 2

Example 3

DAPBI (%mol)

70

70

70

PPD(%mol)

30

30

30

TDC(%mol)

100

100

100

Oxygen concentration during heat treatment (% volume

accumulation)

0.2

0.2

5

Heat treatment temperature (℃)

450

420

420

Heat treatment time (minutes)

0.5

1.0

0.5

Soluble amount of sul...

Embodiment 4

[0161] The heterocyclic aramid fiber prepared in the same manner as in Example 1 was spun to obtain a filament of 1176 dtex.

[0162] Using this filament, after twisting it with a twist coefficient of 6, the fabric density woven into warp and weft is 45 threads / inch, and the weight per unit area is 210g / m 2 flat fabric.

[0163] The LOI value (Limiting Oxygen Index) of this fabric measured according to the JIS K7201 method was 32.

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Abstract

A heterocyclic ring-containing aromatic polyamide fiber of the invention is superior to a conventional aromatic polyamide fiber in balance of mechanical properties, particularly balance of tensile strength, initial modulus and strength in the direction perpendicular to the fiber axis, and also exhibits high strength retention under hot and humid conditions, and is excellent in flame resistance, bulletproofness and cutting resistance. Therefore, it can be preferably used in fields requiring balance of more severe mechanical properties and stability to environmental changes. That is, the heterocyclic ring-containing aromatic polyamide fiber of the invention can be preferably used in, for example, protective materials such as helmets and bulletproof vests, housings such as cars and vessels, electrically insulating materials such as print substrates and other various fields.

Description

technical field [0001] The present invention relates to aramid fiber and its preparation method, fabric made of the fiber and fiber-reinforced composite material reinforced by the fiber. More specifically, it relates to having an excellent balance of mechanical properties, especially a balance of tensile strength, initial modulus, and strength in a direction perpendicular to the fiber axis, compared with conventional aramid fibers At the same time, the aramid fiber with high strength retention rate under hot and humid conditions and its preparation method, as well as the fabric made of the fiber with excellent flame retardancy and ballistic resistance, and the fabric reinforced by the fiber, the reinforcing effect can be maximized Improved fiber reinforced composites. Background technique [0002] Currently, aramid fibers containing aromatic dicarboxylic acid components and aromatic diamine components are widely used in industrial applications and clothing applications due ...

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): D01F6/60C08G69/32C08G73/18B29C48/04
CPCD01F6/605C08G69/32C08G73/18C08J5/046D01F6/805D01D10/02B29C48/04B29C48/919Y10T442/3976D10B2331/021
Inventor 石原繁丸本泰弘和田典子伊泽一尾崎裕美
Owner TEIJIN LTD
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