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Preparation method of prefabricated body for carbon fiber soft felt

A technology of prefabricated body and carbon fiber, which is applied in the direction of textiles, papermaking, non-woven fabrics, etc., can solve the problems of reducing thermal insulation and increasing heat conduction effect, and achieve the effect of reducing radiation heat transfer and enhancing thermal insulation effect

Inactive Publication Date: 2021-06-29
因达孚先进材料(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the density of the soft felt increases, its heat conduction effect also increases, which reduces its thermal insulation effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method for a prefabricated body of carbon fiber soft felt, comprising the steps of:

[0037] (1) Open the polyacrylonitrile fiber with a wire diameter between 10-20 microns into a fluffy single fiber.

[0038] (2) Combing the opened polyacrylonitrile fibers into a web and laying them into a fiber web, prefabricated into a multi-layer inner mesh tire.

[0039] (3) Specially make two layers of outer net tires made of polyacrylonitrile fibers with finer wire diameters; this wire diameter is much thinner than that of fibers used in multi-layer inner net tires, and can be between 3-5 microns .

[0040] (4) The multi-layer inner net tires are stacked in sequence and repeatedly needling the stacked multi-layer inner net tires to make a prefabricated body. When performing acupuncture, the superimposed multi-layer inner net tires advance along the horizontal direction, and a needle board full of needles reciprocates downward on the superimposed multi-layer inner ...

Embodiment 2

[0044] A preparation method for a prefabricated body of carbon fiber soft felt, comprising the steps of:

[0045] (1) Open pitch-based fibers with a diameter of 10-20 microns into fluffy single fibers.

[0046] (2) Comb the opened pitch-based fiber into a web and spread it into a fiber web to prefabricate a multi-layer inner net tire.

[0047](3) Specially make two layers of outer net tires made of pitch-based fibers with finer wire diameters; this wire diameter is much thinner than that of fibers used in multi-layer inner net tires, and can be between 3-5 microns.

[0048] (4) The multi-layer inner net tires are stacked in sequence and repeatedly needling the stacked multi-layer inner net tires to make a prefabricated body. When performing acupuncture, the superimposed multi-layer inner net tires advance along the horizontal direction, and a needle board full of needles reciprocates downward on the superimposed multi-layer inner net tires. When the superimposed multi-layer ...

Embodiment 3

[0052] A preparation method for a prefabricated body of carbon fiber soft felt, comprising the steps of:

[0053] (1) Open viscose-based fibers with a diameter of 10-20 microns into fluffy single fibers.

[0054] (2) Comb the opened viscose-based fibers into a web and lay them into a fiber web to prefabricate a multi-layer inner mesh tire.

[0055] (3) Specially make two layers of outer mesh tires made of viscose-based fibers with finer wire diameters; this wire diameter is much thinner than that of fibers used in multi-layer inner mesh tires, and can be between 3-5 microns .

[0056] (4) The multi-layer inner net tires are stacked in turn, and the outer net tires of fine-diameter fibers are superimposed on the outer layer of the multi-layer inner net tires.

[0057] (5) Repeatedly needling the stacked inner and outer mesh tires to make a prefabricated body. During needle punching, the superimposed inner and outer mesh tires advance along the horizontal direction, and a nee...

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Abstract

The invention discloses a preparation method of a prefabricated body for a carbon fiber soft felt. The preparation method comprises the following steps that organic fibers with a first wire diameter and a second wire diameter are correspondingly opened into fluffy single fibers; the opened organic fibers with the first wire diameter are carded into a web, the web is paved into a fiber web, and a multi-layer inner web tire is prefabricated; the opened organic fibers with the second wire diameter are carded into a web, the web is paved into a fiber web, and two layers of outer web tires are prefabricated; the multiple layers of inner net tires are sequentially and circularly stacked, then the two layers of outer net tires are stacked on the outer sides of the multiple layers of inner net tires, the prefabricated body for the carbon fiber soft felt is obtained through needling integral forming, and the first wire diameter is larger than the second wire diameter. According to the preparation method of the prefabricated body for the carbon fiber soft felt, the scattering effect of the thin filament diameter and the enhanced thermal insulation effect caused by the low density of the thick filament diameter are simultaneously considered, and the radiation heat transfer reduction caused by the improvement of the radiation scattering and the conduction heat transfer reduction caused by the low density are simultaneously considered.

Description

technical field [0001] The invention relates to the technical field of heat insulation material preparation, in particular to a method for preparing a prefabricated body for carbon fiber soft felt. Background technique [0002] Carbon felt is an insulation material based on carbon fiber with a carbon content of more than 99.9%, and is widely used in high-temperature vacuum or inert gas-protected environments with temperatures above 1200°C. Specific applications include various occasions including photovoltaic single crystal growth furnaces, semiconductor crystal growth furnaces, and various high-temperature furnaces. When the carbon felt is working, one side faces the high temperature, which acts as a barrier to the heat from the high temperature area, so as to achieve the effect of heat insulation and heat preservation. [0003] The typical way of making carbon felt is to make organic fibers into a prefabricated body with a certain thickness, width and length by using a no...

Claims

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Application Information

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IPC IPC(8): D04H1/4374D04H1/46D04H1/43D04H1/4258D04H1/4242
CPCD04H1/4242D04H1/4258D04H1/43D04H1/4374D04H1/46
Inventor 李勇
Owner 因达孚先进材料(苏州)有限公司
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