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Method for producing incombustible acrylic yarn and incombustible acrylic yarn manufactured by method

A technology of acrylic fiber and yarn, which is applied in the field of producing non-combustible acrylic fiber yarn, and can solve problems such as difficult protection of human body safety

Inactive Publication Date: 2009-09-30
孙致明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to protect the human body with only flame-retardant fire-resistant textiles, so the advent of non-combustible textiles is urgently needed

Method used

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  • Method for producing incombustible acrylic yarn and incombustible acrylic yarn manufactured by method
  • Method for producing incombustible acrylic yarn and incombustible acrylic yarn manufactured by method
  • Method for producing incombustible acrylic yarn and incombustible acrylic yarn manufactured by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Non-combustible spinnable acrylic fiber F1

[0054] Preparation of non-combustible spinnable acrylic fiber F1

[0055] 6k × 160 bundles of polyacrylonitrile copolymerized precursors with a fineness of 1.2 denier enter the pre-oxidation furnace, and the precursors reciprocate 4 times in a single furnace horizontally for pre-oxidation. The upper part of the pre-oxidation furnace is a heating source, and the lower part is a supply heat source. A temperature difference between layers is naturally formed from the fibers of the uppermost layer longitudinally downward, and the temperature difference is about 1°C. The pre-oxidation temperature ranges from about 200°C to about 280°C, and the heating rate is about 0.267°C / m. The running speed of the polyacrylonitrile precursor is about 2.0m / min, the pre-oxidation time in the furnace is about 319min, and the total draft is about 2.5%, to obtain the non-combustible spinnable acrylic fiber F1.

[0056] Characteriza...

Embodiment 2

[0063] Example 2 Non-combustible spinnable acrylic fiber F2

[0064] Preparation of non-combustible spinnable acrylic fiber F2

[0065] 6k × 160 bundles of polyacrylonitrile copolymerized precursors with a fineness of 1.2 denier enter the pre-oxidation furnace, and the precursors reciprocate 4 times in a single furnace horizontally for pre-oxidation. The upper part of the pre-oxidation furnace is a heating source, and the lower part is a supply heat source. A temperature difference between the layers is naturally formed longitudinally downward from the fibers of the uppermost layer, and the temperature difference is about 2°C. The pre-oxidation temperature ranges from about 200°C to about 280°C, and the heating rate is about 0.267°C / m. The running speed of the polyacrylonitrile precursor is about 1.0m / min, the time for pre-oxidation in the furnace is about 220min, and the total draft is about 2.5%, to obtain non-combustible spinnable acrylic fiber F2.

[0066] Characte...

Embodiment 3

[0071] Example 3 Non-combustible spinnable acrylic carbon fiber

[0072] Preparation of non-combustible spinnable acrylic carbon fiber

[0073] Make 6k×160 bundles of polyacrylonitrile copolymerized precursors with a fineness of 1.2 denier enter the pre-oxidation furnace, and the precursors reciprocate horizontally for 3 times in a single furnace for pre-oxidation. The upper part of the pre-oxidation furnace is a heating source, and the lower part is a supply heat source. A temperature difference between layers is naturally formed from the fibers of the uppermost layer longitudinally downward, and the temperature difference is about 5°C. The pre-oxidation temperature ranges from about 200°C to about 280°C, and the heating rate is about 0.267°C / m. The running speed of the polyacrylonitrile precursor is about 3.5m / min, the pre-oxidation time in the furnace is about 99min, and the total draft is about 1.5%. After leaving the pre-oxidation furnace, the acrylic fiber obtained...

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Abstract

The invention relates to a method for producing an incombustible acrylic yarn and the incombustible acrylic yarn manufactured by the method and also relates to a middle product in the process of producing the incombustible acrylic yarn, wherein the middle product is incombustible spinnable acrylic fibre, incombustible spinnable acrylic carbon fibre and incombustible carded sliver. The method for producing the incombustible acrylic yarn comprises the following steps: preoxidation: polyacrylonitrile protofilament is preoxidated in a phased heating mode; the temperature difference between the phases is between 1 and 5 DEG C; carbonization: the carbonization temperature is between 300 and 1,000 DEG C; the manufacture of the carded silver by a precutting method: the incombustible spinnable acrylic fibre or the incombustible spinnable acrylic carbon fibre is precut to form a plurality of precutting points so as to form the carded silver; and manufacturing the incombustible carded silver into the incombustible acrylic yarns.

Description

field of invention [0001] The invention relates to a method for producing non-combustible acrylic fiber yarn and the non-combustible acrylic fiber yarn prepared therefrom, and also relates to an intermediate product in the process of producing non-combustible acrylic fiber yarn, the intermediate product is non-combustible spinnable acrylic fiber, non-combustible Permanent spinnable acrylic carbon fiber and non-combustible raw sliver. Background of the invention [0002] Nowadays, many countries in the world have established strict textile fire protection regulations and corresponding testing methods, which makes flame-retardant acrylic fiber a hot spot in the research of flame-retardant materials. At present, the flame-retardant acrylic fibers used in fire-fighting and other thermal operation positions on the market are mainly obtained through three methods: [0003] (1) Post-treatment physical modification [0004] Phosphorus, chlorine, antimony, bromine and other flame r...

Claims

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Application Information

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IPC IPC(8): D02G3/02D01G1/00D01F9/22D01F6/18D01F11/06
Inventor 孙致明
Owner 孙致明
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