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Halogen-free, flame-retardant and ablation-resistant fiber material, and preparation method and application thereof

A technology of ablation-resistant fiber and polyimide fiber, which is applied in the manufacture of fire-resistant and flame-retardant filaments, fiber chemical characteristics, textiles and papermaking, etc. Meet the requirements of flame retardant filling, limited specific surface area, etc., and achieve good thermal insulation effect and air permeability, high fire protection safety, and low thermal conductivity

Active Publication Date: 2017-08-11
JIANGSU XIANNUO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the monofilament diameter of the fiber is usually between 5-20 μm, and the specific surface area is limited, which cannot meet the requirements of clothing fillers or flame-retardant fillings of some rubber and plastic materials.
Invention patent CN201510532799.3 once disclosed a method of using the fiber to prepare fiber pulp, and obtained polyimide fiber pulp with a relatively high specific surface area, but the flame retardancy and ablation resistance of this type of material are not good. no in-depth research
Among them, although halogenated flame retardant has good effect and has been widely used, it will produce toxic gas-hydrogen halide in the combustion process, which is seriously harmful to the environment. Currently, most countries have restricted its use.

Method used

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  • Halogen-free, flame-retardant and ablation-resistant fiber material, and preparation method and application thereof
  • Halogen-free, flame-retardant and ablation-resistant fiber material, and preparation method and application thereof
  • Halogen-free, flame-retardant and ablation-resistant fiber material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) PMDA, SiDA and BAPPO three monomers are prepared by polycondensation reaction according to the ratio of 80:20:100 to obtain polyimide fibers, the diameter of the fibers is 10 μm, and the linear density of the tow is 1100dtex;

[0028] 2) The polyimide fiber obtained in step 1) is mechanically cut to obtain short fibers with a length of 3 cm, and then the short fibers are dispersed in water by a disintegrator to obtain a slurry suspension with a concentration of 1 wt %;

[0029] 3) Place the slurry suspension obtained in step 2) in a WALL-E beater, mechanically abrasion at 80° C. for 120 minutes, and the weight of the WALL-E beater is 10 kg, to obtain a fiber slurry with a microfiber length of 5-8 mm;

[0030] 4) The fiber slurry obtained in step 3) is dehydrated and air-dried, and then undergoes a fiber opening and loosening process to finally obtain a halogen-free flame-retardant and ablation-resistant fiber material with a high specific surface area. The specific s...

Embodiment 2

[0032] 1) Polyimide fibers were prepared by polycondensation reaction of PMDA, SiDA and BAPPO three monomers in a ratio of 60:40:100, the diameter of the fibers was 15 μm, and the linear density of the tow was 1500 dtex;

[0033] 2) The polyimide fibers obtained in step 1) are mechanically cut to obtain short fibers with a length of 3 cm, and then the short fibers are dispersed in water by a disintegrator to obtain a slurry suspension with a concentration of 3 wt %;

[0034] 3) Put the slurry suspension obtained in step 2) in a WALL-E beater, mechanically abrasion at 80° C. for 60 minutes, and the weight of the WALL-E beater is 10 kg, to obtain a fiber slurry with a microfiber length of 5-10 mm;

[0035] 4) The fiber slurry obtained in step 3) is dehydrated and air-dried, and then undergoes a fiber opening and loosening process to finally obtain a halogen-free flame-retardant and ablation-resistant fiber material with a high specific surface area. The specific surface area of ...

Embodiment 3

[0037] 1) Polyimide fibers are prepared by polycondensation reaction of PMDA, SiDA and BAPPO three monomers in a ratio of 40:60:100, the diameter of the fibers is 20 μm, and the linear density of the tow is 2000 dtex;

[0038] 2) The polyimide fiber obtained in step 1) is mechanically cut to obtain short fibers with a length of 4 cm, and then the short fibers are dispersed in water by a disintegrator to obtain a slurry suspension with a concentration of 1 wt %;

[0039] 3) Place the slurry suspension obtained in step 2) in a WALL-E beater, mechanically abrade it at 50° C. for 120 minutes, with a weight of 5 kg on the WALL-E beater, to obtain a fiber slurry with a microfiber length of 10-20 mm;

[0040] 4) The fiber slurry obtained in step 3) is dehydrated and air-dried, and then undergoes a fiber opening and loosening process to finally obtain a halogen-free flame-retardant and ablation-resistant fiber material with a high specific surface area. The specific surface area of ​​...

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Abstract

The invention relates to a halogen-free, flame-retardant and ablation-resistant fiber material, and a preparation method and an application thereof, and belongs to the technical field of special flame-retardant and ablation-resistant filling materials. The preparation method of the fiber material comprises the following steps: carrying out a condensation polymerization reaction on phosphorus / silicon-containing aromatic dianhydride and aromatic diamine to obtain polyimide fibers, and carrying out chopping, mechanical abrasion and loosening treatment to form the dendritic halogen-free and flame-retardant fiber material having a high specific surface area. The introduction of phosphorus and silicon elements further improves the flame resistance and the ablation resistance of a polyimide material, and the dendritic structure having a high specific surface area makes the fiber material have a low thermal conduction coefficient, good warming effect and good air permeability. The above product is suitable for filling warming working clothes or child warming clothes in petrochemical factories, mines, factories and other special workplaces, and also can be as a halogen-free, flame-retardant and ablation-resistant filler to improve the flame resistance and the ablation resistance of rubber and plastics.

Description

technical field [0001] The invention relates to the technical field of special flame-retardant and ablation-resistant filling materials, in particular to a halogen-free flame-retardant and ablation-resistant fiber material and its preparation method and application. Background technique [0002] Down refers to the flower-like fluff on the abdomen of a goose or duck. Because it has a large number of microporous structures and a super high specific surface area, it has good temperature regulation and warmth retention effects, and is an important material for the preparation of thermal clothing, mattresses and other products. One of the raw materials. However, since natural down products are animal protein fibers, although they have excellent thermal insulation properties, they are extremely flammable, making them difficult to apply to certain working conditions that require both thermal insulation and flame-retardant protection. [0003] Polyimide fiber is a high-performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/78D01F1/07C08G73/10C08L79/08
CPCC08G73/1057C08G73/106C08G73/1071C08L79/08C08L2201/02C08L2201/22C08L2205/16D01F1/07D01F6/78
Inventor 武德珍田国峰牛鸿庆韩恩林
Owner JIANGSU XIANNUO NEW MATERIAL TECH
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