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Preparation method of polyacrylonitrile oxidized fiber felt

A technology of polyacrylonitrile and oxidized fiber, applied in the direction of fiber type, fiber treatment, flame-retardant fiber, etc., can solve the problems of difficult to fully oxidize the fiber, adverse effects on product quality, difficult oxidation treatment, etc., and achieve low production cost and shrinkage. The effect of small deformation and high production efficiency

Active Publication Date: 2017-12-12
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process brings great difficulties to the oxidation treatment
Due to the certain thickness and bulk density of polyacrylonitrile felt or cloth, it is difficult to fully oxidize the fibers, and the flame retardancy of the product is low
Also, acrylic felt or cloth can shrink considerably during oxidation and even stick together, adversely affecting the quality of the final product

Method used

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  • Preparation method of polyacrylonitrile oxidized fiber felt
  • Preparation method of polyacrylonitrile oxidized fiber felt
  • Preparation method of polyacrylonitrile oxidized fiber felt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using short polyacrylonitrile fibers with a fineness of 1.5D and a length of 60mm as raw materials, they are first made into a net by carding and needle punching, with an area density of 210g / m 2 felt, and then soak it at room temperature with 0.5% amino-modified polysiloxane, 0.2% epoxy-modified polysiloxane, 0.6% polyether-modified polysiloxane, 1% guanidine phosphate and 1% Modification treatment in an aqueous emulsion of guanidine carbonate for 5 minutes; then, dry the modified polyacrylonitrile fiber mat at 110°C, and then send it into an air oxidation furnace for oxidation treatment: at a heating rate of 1°C / min Raise from 200°C to 280°C, and keep the temperature at 280°C for 20 minutes to prepare a soft polyacrylonitrile oxidation fiber mat with less shrinkage deformation. Its areal density was determined to be 199g / m 2 .

[0029] According to the national standard "Oxygen Index Method for Combustion Performance Test of Textiles" (GB / T 5454-1997), the limiting ...

Embodiment 2

[0031] With the polyacrylonitrile short fiber identical with embodiment 1 as raw material, it is 520g / m at first that it is made into a surface density by carding into a net and needle punching 2 felt, and then immersed in the aqueous emulsion containing 3% polysiloxane, 0.1% guanidine phosphate and 1% guanidine hydrochloride at room temperature for 10 minutes; then, the modified polyacrylonitrile fiber felt was treated at 100 ° C It is then dried in an air oxidation furnace for oxidation treatment: the heating rate is raised from 220°C to 280°C at a rate of 1°C / min, and the temperature is kept at 280°C for 10 minutes to produce soft polypropylene with less shrinkage deformation Nitrile oxidized fiber felt. Its areal density was determined to be 504g / m 2 .

[0032] According to the national standard "Oxygen Index Method for Combustion Performance Test of Textiles" (GB / T 5454-1997), the limiting oxygen index of the polyacrylonitrile oxidized fiber felt is measured as 41% by u...

Embodiment 3

[0034] With the polyacrylonitrile short fiber identical with embodiment 1 as raw material, it is 300g / m surface density that it is made at first by carding into a net and needle punching 2felt, and then dip it into an aqueous emulsion containing 5% amino-modified polysiloxane, 0.2% epoxy-modified polysiloxane, 1% polyether-modified polysiloxane and 10% guanidine carbonate at room temperature Intermediate treatment for 1 min; then, the modified polyacrylonitrile fiber mat was dried at 150°C, and then sent to an air oxidation furnace for oxidation treatment: respectively at 210°C, 220°C, 240°C, 260°C, 280°C Each treatment at ℃ for 10 minutes can produce a polyacrylonitrile oxidized fiber mat with less shrinkage deformation and softer properties. Its areal density was determined to be 291g / m 2 .

[0035] According to the national standard "Oxygen Index Method for Combustion Performance Test of Textiles" (GB / T 5454-1997), the limiting oxygen index of the polyacrylonitrile oxidiz...

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Abstract

The invention provides a preparation method of polyacrylonitrile oxidized fiber felt. The method is characterized in that firstly, polyacrylonitrile short fiber is made into felt through carding and net forming and needling; then, aqueous emulsion of polyorganosiloxane and guanidine compounds is used for performing chemical modification treatment on the felt; finally, drying and oxidation treatment are performed to prepare the polyacrylonitrile oxidized fiber felt. The method has the advantages that the operation is simple; the production efficiency is high; the production cost is low. The prepared polyacrylonitrile oxidized fiber felt has excellent flame retardant property; the limited oxygen index can reach 40 percent or higher; the shrinkage distortion is small; the flexibility is high.

Description

technical field [0001] The invention relates to the field of flame-retardant fiber and textile material manufacturing, in particular to a preparation method of polyacrylonitrile oxidized fiber felt. Background technique [0002] Polyacrylonitrile oxidized fiber is a high-grade flame-retardant fiber material, which has excellent fire resistance, heat insulation, high temperature resistance, chemical corrosion resistance, friction resistance, electrical insulation, textile processing and wear performance. Polyacrylonitrile oxidized fiber has a very high limiting oxygen index, does not burn in the air, does not melt, does not shrink at high temperature, and can maintain the shape of the fiber. Its thermal conductivity is very low, which can reduce the scalding of fabrics caused by elevated temperatures, and it releases very little toxic gas in flames or under strong radiant heat. Polyacrylonitrile oxidation fiber is resistant to acid and alkali corrosion and almost all solvent...

Claims

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Application Information

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IPC IPC(8): D06M15/643D06M15/647D06M15/65D06M13/432D06M11/34D04H1/43D04H1/46D06M101/28
CPCD04H1/43D04H1/46D06M11/34D06M13/432D06M15/6436D06M15/647D06M15/65D06M2101/28D06M2200/30
Inventor 欧阳琴皇静马洪波徐敏军葛寿祥夏未锋
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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