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Thermal treatment modification method for PBO (Poly-p-phenylene ben-zobisthiazole) fibers

A heat treatment modification and fiber technology, which is applied in the field of PBO fiber modification and PBO fiber heat treatment modification, can solve the problems of low fiber strength and modulus, unreasonable heat treatment process, etc., and achieve high fiber strength and modulus, Effects of eliminating adverse effects and improving crystallinity and orientation

Active Publication Date: 2015-11-11
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention aims to solve the problem of unreasonable heat treatment process in the production of PBO fiber in the prior art, resulting in low fiber strength and modulus, and provides a heat treatment modification method for PBO fiber, which can improve the strength and strength of PBO fiber. Modulus

Method used

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  • Thermal treatment modification method for PBO (Poly-p-phenylene ben-zobisthiazole) fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A heat treatment modification method of PBO fiber, comprising the following process steps:

[0035] A. Enter the heat treatment channel

[0036] The PBO fiber obtained by spinning is controlled to have a moisture content of 5%, and then enters a segmented heat treatment channel under an inert atmosphere; the segmented heat treatment channel includes a preheating section, a heat treatment section and a cooling section;

[0037] B. Preheating section

[0038] Put the PBO fiber into the preheating section first, the temperature gradually increases, and the temperature in the preheating section is controlled to be 100-550 °C;

[0039] C, heat treatment section

[0040] After the PBO fiber in the preheating section enters the heat treatment section, the temperature of the heat treatment section is controlled to be 550-630 °C;

[0041] D, cooling section

[0042] The PBO fiber after the heat treatment section finally enters the cooling section, and the temperature gradual...

Embodiment 2

[0044] A heat treatment modification method of PBO fiber, comprising the following process steps:

[0045] A. Enter the heat treatment channel

[0046] The PBO fiber obtained by spinning is controlled to have a moisture content of 45%, and then enters a segmented heat treatment channel under an inert atmosphere; the segmented heat treatment channel includes a preheating section, a heat treatment section and a cooling section;

[0047] B. Preheating section

[0048] Put the PBO fiber into the preheating section first, the temperature gradually increases, and the temperature in the preheating section is controlled to be 100-550 °C;

[0049] C, heat treatment section

[0050] After the PBO fiber in the preheating section enters the heat treatment section, the temperature of the heat treatment section is controlled to be 550-630 °C;

[0051] D, cooling section

[0052] The PBO fiber after the heat treatment section finally enters the cooling section, and the temperature gradua...

Embodiment 3

[0054] A heat treatment modification method of PBO fiber, comprising the following process steps:

[0055] A. Enter the heat treatment channel

[0056] The PBO fiber obtained by spinning is controlled to have a moisture content of 25%, and then enters a segmented heat treatment channel under an inert atmosphere; the segmented heat treatment channel includes a preheating section, a heat treatment section and a cooling section;

[0057] B. Preheating section

[0058] Put the PBO fiber into the preheating section first, the temperature gradually increases, and the temperature in the preheating section is controlled to be 100-550 °C;

[0059] C, heat treatment section

[0060] After the PBO fiber in the preheating section enters the heat treatment section, the temperature of the heat treatment section is controlled to be 550-630 °C;

[0061] D, cooling section

[0062] The PBO fiber after the heat treatment section finally enters the cooling section, and the temperature gradua...

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Abstract

The invention relates to a thermal treatment modification method for PBO (Poly-p-phenylene ben-zobisthiazole) fibers, and belongs to the technical field of macromolecular fiber modification. The thermal treatment modification method for the PBO fibers comprises entering a thermal treatment channel, a preheating section, a thermal treatment section and a cooling section. According to the thermal treatment modification method, the PBO fibers enter the sectional type thermal treatment channel through a tension roller; the preheating section and the cooling section which are additionally arranged in the sectional type thermal treatment channel have an important role in improving the intensity and the modulus of the fibers; as water has a plastification effect, in a preheating process of the preheating section, movement of a molecule chain is facilitated, the mutual action between the specific moisture content and the preheating section is controlled, and the crystallizing degree and the orientation degree of the fibers in the thermal treatment section are improved; finally, due to the cooling section additionally arranged in the sectional type thermal treatment channel, the fibers subjected to thermal treatment can be effectively prevented from being directly exposed in the air, so that high-temperature thermo-oxidative degradation of the fibers in hot air is effectively reduced, and the intensity and the modulus of the treated fibers are greatly improved.

Description

technical field [0001] The invention relates to a modification method of PBO fiber, more specifically, the invention relates to a heat treatment modification method of PBO fiber, which belongs to the technical field of polymer fiber modification. Background technique [0002] PBO is the abbreviation of poly-p-phenylene benzobisoxazole. PBO fiber is a kind of high-performance fiber made by spinning PBO polymer. The temperature is 650°C, which is 100°C higher than that of aramid fiber, and the limiting oxygen index (LOI) is 68. It is known as "the super fiber of the 21st century" and can be used in aerospace fields, such as: spacecraft structural materials, space suits, Mars Balloon membranes for detectors, body armor, bulletproof helmets, impact-resistant materials for aircraft fuselages, and protective equipment for missiles. [0003] Domestic research on PBO polymerization first began in the 1990s, due to the immaturity of the synthesis technology of PBO monomer 4,6-diamin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D10/02
Inventor 许伟严家策冉茂强范新年赵亮郭玲黄治川付兴伟胡娟
Owner CHINA BLUESTAR CHENGRAND CO LTD
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