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A kind of preoxygenated fiber and preparation method thereof

A pre-oxygenated fiber, pre-oxidation technology, applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., can solve the problem of pre-oxygen fiber processability downstream products tear resistance, poor abrasion resistance, low pre-oxygen fiber strength, affecting products. performance and other issues, to achieve the effect of less fiber hole defects, improved processability, and large strength retention

Active Publication Date: 2021-11-30
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this pre-oxygenated fiber production process is based on the ultimate goal of producing high-performance carbon fibers, while ignoring the performance of the pre-oxygenated fiber itself, resulting in low strength of the pre-oxygenated fiber, and the single-filament strength is below 300MPa. Processability and poor tear resistance and wear resistance of downstream products have a great negative impact
At the same time, since the oils of polyacrylonitrile precursors for carbon fibers are mostly high-temperature-resistant silicon-containing oils, they cannot be decomposed and removed only by pre-oxidation temperature, and black smoke will be generated when encountering an open flame, which will affect product performance.

Method used

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  • A kind of preoxygenated fiber and preparation method thereof
  • A kind of preoxygenated fiber and preparation method thereof
  • A kind of preoxygenated fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a method of preparation of pre-oxide fibers, such as figure 2 As shown, the polyacrylonitrile yarn passes through the discharge device 21 into the first pre-oxidation furnace 22, and the first pre-oxidation furnace 22 temperature is 125 ° C, which is applied to 8%, and the treatment time is 60 minutes. Then, the second pre-oxidation furnace 23 was entered, and the second pre-oxidation furnace 23 was 235 ° C, which was applied to 2%, and the treatment time was 60 minutes. The temperature of the steam drafting device 24 is 100 ° C, which is applied to 2%. Adjust the pressure and spacing of the curled device 25 to reach the curl effect of 3 / cm. The drying type 26 is a hot air drying type, a hot air temperature of 80 ° C, and the drying time is 30 minutes. The back box has prepared pre-oxide fiber products.

[0035] The oil agent used by the raw material polypropylene nitrile raw wire is oleic acid (400) polyethylene glycol ester, and the oil content ...

Embodiment 2

[0037] This embodiment provides a method of preparation of pre-oxide fibers, such as figure 2As shown, the polyacrylonitrile yarn passes through the discharge device 21 into the first pre-oxidation furnace 22, and the first pre-oxidation furnace 22 temperature is 135 ° C, which is applied to 7%, and the treatment time is 60 minutes. Then, it entered the second pre-oxidation furnace 23, the second pre-oxidation furnace 23 temperature was 250 ° C, which was applied to 1.5%, and the treatment time was 60 minutes. The temperature of the steam drafting device 24 is 110 ° C, which is applied to 2%. Adjust the pressure and spacing of the curled device 25 to reach the curl effect of 3 / cm. The drying shaped device 26 is a hot air drying type, a hot air temperature of 100 ° C, and the drying time is 20 minutes. The back box has prepared pre-oxide fiber products.

[0038] The oil agent used by the raw material polypropylene nitrile raw wire is oleic acid (400) polyethylene glycol ester, an...

Embodiment 3

[0040] This embodiment provides a method of preparation of pre-oxide fibers, such as figure 2 As shown, the polyacrylonitrile yarn passes through the discharge device 21 into the first pre-oxidation furnace 22, and the first pre-oxidation furnace 22 temperature is 150 ° C, which is applied to 6%, and the treatment time is 45 minutes. Then, the second pre-oxidation furnace 23 was entered, and the second pre-oxidation furnace 23 was 260 ° C, which was applied to 1%, and the treatment time was 45 minutes. The temperature of the steam drafting device 24 is 100 ° C, which is applied to 2%. Adjust the pressure and spacing of the curled device 25 to reach the curl effect of 5 / cm. The drying shaped device 26 is a hot air drying type, a hot air temperature of 120 ° C, and the drying time is 10 minutes. The back box has prepared pre-oxide fiber products.

[0041] The oil agent used by the raw material polypropylene nitrile raw wire is a polyoxycetate lae-9, and the oil content is 1%.

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Abstract

The invention belongs to the technical field of fiber material preparation, and in particular relates to a pre-oxidized fiber and a preparation method thereof. The pre-oxidized fiber has an obvious "skin-core structure", including a skin layer and a core layer, wherein the density of the skin layer is 1.38-1.41g / cm 3 , the density of the core layer is 1.34‑1.38g / cm 3 . The preparation method of the pre-oxidized fiber is as follows: using polyacrylonitrile precursor as raw material, it is prepared through unwinding, first pre-oxidation, second pre-oxidation, drafting, crimping, drying and shaping, and packing; wherein, the first pre-oxidation The oxidation temperature is 80-160°C lower than the second pre-oxidation temperature. The technicians of the present invention have found through research that this "skin-core structure" is advantageous. On the one hand, the high density of the outer skin layer can ensure that the pre-oxidized fiber has good flame retardancy. On the other hand, the small density of the inner core layer means The fiber hole defect is less, and the strength retention is large, which is beneficial to improve the processability of the pre-oxidized fiber.

Description

Technical field [0001] The present invention belongs to the technical field of fiber material preparation, and more particularly to a pre-oxygen fiber and a preparation method thereof. Background technique [0002] The pre-oxygen fiber has good flame retardant properties, which is high in oxygen-oriented index, not burning under open fire, no fusion, good thermal insulation, excellent sound absorption, and antifungal, polyimide fibers, etc. The price advantage, can be made of yarns, felts, cloth and other product forms alone or with other fiber blending, can be widely used in fire blanket, fire felt, flame retardant underwear, protective clothing, sound absorbing barrier and other product fields. [0003] At present, the pre-oxide fiber is more than the intermediate product producing carbon fibers. It is also a carbon fiber polyacrylonitrile yarn as a raw material, for example, a Chinese patent CN102704043A, which discloses a preparation method of polyacrylonitrile pre-oxide and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/22
CPCD01F9/22
Inventor 孙晓光陈新邱宁张燕秉金文德李靖孔晓峰王斌刘主光易永利何州文兰逢涛聂京凯王广克何强侯东刘方赵发平佘彦杰方涛
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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