Wholly aromatic polyamide fiber

A polyamide fiber, fully aromatic technology, used in the field of composite cables and conduits, can solve the problems of kink, no flexibility, large thickness, etc., and achieve fine single filament fineness, fine total fineness, excellent quality and reinforcement. Effect

Active Publication Date: 2020-12-18
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional fibers have problems such as thicker monofilaments, greater thickness, lack of flexibility, and kinks.
The biggest problem with such fibers is the inability to make the catheter thinner

Method used

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  • Wholly aromatic polyamide fiber
  • Wholly aromatic polyamide fiber
  • Wholly aromatic polyamide fiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0083] Examples of solvents used in the preparation of the spinning solution (dope) include N-methylpyrrolidone (NMP), dimethylacetamide (DMAc), dimethylformamide (DMF), dimethylmethylene Sulfone (DMSO) and N-methylcaprolactam (NMC), etc. The solvent to be used may be alone or may be a mixed solvent obtained by mixing two or more kinds. Furthermore, the solvent used for the polymerization of a wholly aromatic polyamide can also be used as it is.

[0084] In addition, other optional components such as additives may be blended for the purpose of imparting functionality to the fibers. Other optional components may be introduced during the preparation of the spinning solution (dope). The introduction method is not particularly limited, and for example, the coating material can be introduced using an extruder, a mixer, or the like.

[0085] It should be noted that the polymer concentration in the spinning solution (dope), that is, the concentration of the wholly aromatic polyami...

Embodiment 1

[0194] (Preparation of paint)

[0195] A polymer solution (dope) of copolymerized p-phenylene-3,4'-oxydiphenylene-terephthalamide was prepared according to a known method. Specifically, 100 parts by mass of terephthaloyl dichloride was added to NMP in which 50 parts by mass of p-phenylenediamine and 50 parts by mass of 3,4'-diaminodiphenyl ether were dissolved, and a polycondensation reaction was carried out to obtain a copolymer Polymer solutions (paints) of p-phenylene-3,4'-oxydiphenylene-terephthalamide. The polymer concentration was 6% by mass. The intrinsic viscosity (IV) of the polymer was 3.38.

[0196] (Manufacture of fully aromatic polyamide fiber)

[0197] The polymer solution (dope) obtained above was discharged using a spinning spinneret having 8 holes. Then, the spun polymer solution (dope) was passed through a coagulation bath through an air gap of 10 mm, thereby being coagulated. The coagulation bath was set at 60° C. and filled with an aqueous solution hav...

Embodiment 2

[0201] Using a spinning spinneret with 10 holes, discharging in a manner that the total fineness becomes 28dtex, and setting the number of filaments to 10, and the single filament fineness to 2.8dtex, except that, the same method as in Example 1 was used to obtain the full Aramid fiber. Table 1 shows the physical properties and the like of the obtained wholly aromatic polyamide fiber.

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Abstract

Provided is a wholly aromatic polyamide fiber having a favorable appearance quality and reinforcement while having a small total fineness and a small single yarn fineness. The wholly aromatic polyamide fiber is characterized in that the single yarn fineness is 0.4-3.5 dtex, the total fineness is 5-30 dtex, the breaking strength is at least 15 cN/dtex, the initial tensile modulus is 500-750 cN/dtex, and the number of fibrils per meter is less than 100.

Description

technical field [0001] The present disclosure relates to a wholly aromatic polyamide fiber. In more detail, it is related with the wholly aromatic polyamide fiber which both a fiber and a monofilament are thin and soft, and is excellent in handleability. The present disclosure also relates to composite cables and conduits using such wholly aromatic polyamide fibers. Background technique [0002] Conventionally, composite cables for signal transmission have been used for data transmission and reception between electronic devices. In recent years, with the improvement of electronic equipment, the amount of data to be transmitted has increased remarkably, and high-speed transmission has been demanded. In order to meet such demands, a large amount of data can be transmitted in a short time by adding signal transmission lines constituting the composite cable. [0003] From the viewpoint of operability, such composite cables are required to be thin and flexible, and reduction i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60A61L29/06A61L29/14D01F6/80D07B1/02
CPCA61L29/06A61L29/14D01F6/605D01F6/805D07B1/147D07B2205/205H01B7/183C08L77/10D07B2801/10D07B1/02A61M25/005A61M2025/0059D01F6/60D01F6/80A61L29/04D01D5/04D01D10/06D07B1/005D10B2331/021D10B2509/00D07B1/025Y10T428/2913
Inventor 小宫直也川村兼司
Owner TEIJIN LTD
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