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Polybenzazole fiber and pyridobisimidazole fiber

A polybenzazole-based, phenylene pyridine technology, applied in electrical components, electrical solid devices, circuits, etc., can solve problems such as wire breakage, changing spinning conditions, etc., and achieve fiber strength reduction, fibril suppression, post-processing properties improved effect

Inactive Publication Date: 2011-05-11
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the concentration or molecular weight of the polymer is lowered, thread breakage during spinning will easily occur, and switching loss (loss) in brand production will usually occur, and the viscosity behavior of the dope will also change greatly, so there are also The problem of poor operability such as the need to change spinning conditions
On the other hand, heat treatment of fibers at high temperature for a long time requires a high temperature furnace, which requires a lot of energy

Method used

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  • Polybenzazole fiber and pyridobisimidazole fiber
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  • Polybenzazole fiber and pyridobisimidazole fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6、 comparative example 1～3

[0110] Using a spinning stock solution (14% by mass of PBO concentration) obtained by dissolving poly(p-phenylene benzobisoxazole) (hereinafter abbreviated as PBO) with an intrinsic viscosity [η] of 29 dl / g in polyphosphoric acid, Spinning was performed under conditions such that the diameter of the monofilament fiber was 11.5 μm and 1.65 dtex.

[0111] That is, at a spinning temperature of 175°C, the spinning dope is spun from a nozzle with a hole diameter of 0.20 mm and a number of holes of 166, and the spun dope fibers are passed through a quenching chamber (chamber) with a quenching temperature of 60°C , cooled, and after passing through the quenching chamber, they were immersed in the first coagulation and washing bath while being bundled into multifilaments to coagulate the fibers, and steam treatment was performed using the steam application conditions shown in Table 1 at the same time. Thereafter, the fibers were washed with water until the residual phosphorus concentr...

Embodiment 7～12、 comparative example 3～6

[0119] A spinning stock solution (benzene, phenylene) obtained by dissolving phenylenepyrididimidazole-2,6-diyl (2,5-dihydroxy-p-phenylene) with an intrinsic viscosity [η] of 22 dl / g in polyphosphoric acid was used. Pyridinediimidazole-2,6-diyl (2,5-dihydroxy-p-phenylene) concentration: 14% by mass), spinning under conditions such that the single filament fiber diameter becomes 11.5 μm and 1.65 dtex .

[0120] That is, at a spinning temperature of 175°C, the spinning dope is spun from a nozzle with a hole diameter of 0.20 mm and a number of holes of 166, and the spun dope fibers are passed through a quenching chamber with a quenching temperature of 60°C, cooled, and after passing through the quenching chamber, while While bundled into multifibers, the fibers were immersed in a first coagulation / washing bath to coagulate the fibers, and steam treatment was performed under the steam application conditions shown in Table 1. Thereafter, the fibers were washed with water until the...

Embodiment 13

[0128] The fibers prepared in Example 1 were heat-treated for 2.4 seconds under a tension of 5.0 g / d and a temperature of 600°C. The results are shown in Table 5 and Table 6.

[0129]

[0130] As can be seen from the results in Table 5, the fibers of the present invention maintain excellent heat resistance and flame retardancy.

[0131] [Table 6]

[0132]

[0133] From Table 6, it can be confirmed that the fiber of the present invention maintains a good state of process passability even when heat-treated.

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Abstract

The present invention provides a polybenzazole fiber and a pyridobisimidazole fiber which can maintain the excellent heat resistance, flame retardance of polybenzazole fiber and pyridobisimidazole fiber and simultaneously increases the afterprocessing property without changing the condition of manufacturing process with a large scale or requiring the long-time heat treatment in high temperature. The polybenzazole fiber is characterized in that when the diffraction peak area which is on the equator-direction profile and comes from the crystallization surface (200) is set to S1, and the diffraction peak area which comes from the crystallization surface (010) and the surface (-210) is set to S2, the existence state of polybenzazole crystal satisfies that S2 / S1 is 0.1-0.8 in the electron-diffraction diagram obtained from the top part (surface-1mu m) of polybenzazole fiber. The pyridobisimidazole fiber is characterized in that when the diffraction peak area which is on the equator-direction profile and comes from the crystallization surface (200) is set to S1, and the diffraction peak area which comes from the crystallization surface (110), (210) and (400) is set to S2, the existence state of pyridobisimidazole crystal satisfies that S2 / S1 is 0.1-1.5.

Description

technical field [0001] The present invention relates to polybenzazole (polybenzazole) fiber and phenylene pyridobiimidazole (pyridobisimidazole) fiber. Polybenzazole-based fibers and phenylenepyridodiimidazole fibers have excellent post-processing properties such as cutting and felting, and can be used not only as industrial materials, but also as polybenzazole-based fibers and phenylenepyridine fibers. Developed for various applications of heat resistance and flame retardancy of diimidazole fiber. Background technique [0002] Polybenzazole-based fibers such as polybenzoxazole and polybenzothiazole are known as fibers having high strength and high heat resistance, and the fiberization of such polymers is described in Patent Documents 1 and 2. [0003] Patent Document 1: Specification of US Patent No. 5,296,185 [0004] Patent Document 2: Specification of US Patent No. 5385702 [0005] Polybenzazole-based fibers and phenylenepyrididimidazole fibers have the highest level ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/74
CPCH01L2924/0002
Inventor 北河享雾山晃平渡拔政治寺本喜彦清水祐辅
Owner TOYOBO CO LTD
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