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Method for preparing carbon fiber-sewed hard plate thermal insulation material

A technology of thermal insulation material and carbon fiber, which is applied in the field of hot field material accessories for high-temperature furnaces. It can solve the problems of easy delamination, easy delamination of felt body, and poor processability of products, so that it is not easy to fall off and has good bonding performance. , Excellent anti-airflow erosion ability and anti-oxidation ability

Pending Publication Date: 2019-08-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the publication number CN1011948327A discloses a preparation method of machinable hardening insulation felt for high-temperature furnaces. The patent uses a resin adhesive to bond and form each layer of carbon felt. The difference in coefficients leads to the fact that the carbon felt is prone to delamination during repeated heating and cooling.
[0005] However, the high-purity solidified carbon felt, solidified carbon felt or solidified foamed carbon heat insulation materials mentioned in the above patents are all molded by means of molds or moulds, and the processability of the products is not strong or the felts are easily delaminated.

Method used

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  • Method for preparing carbon fiber-sewed hard plate thermal insulation material
  • Method for preparing carbon fiber-sewed hard plate thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Use PAN-based carbon felt as the main raw material, and control the density of the soft felt at 0.06g / cm 3 , the thickness is 4mm.

[0035] Step 2: The carbon fiber is longitudinally sewn into shape, the carbon fiber is PAN-based carbon fiber, the number of tows is 1K, the size of the foam board tooling 1 is placed on the bottom layer, and then 12 layers of PAN carbon felt 2 are laid, and the barb needle 3 is used to wrap The carbon fiber 4 is vertically inserted in the soft felt, and each layer of the carbon fiber soft felt is connected with carbon fibers to form a whole.

[0036] Step 3: Prepare the resin impregnating solution, the resin is furan resin, the solvent is alcohol, mix the resin and solvent in a weight ratio of 1:2, and stir evenly.

[0037]Step 4: Soak the sewn carbon fiber felt in the resin impregnating liquid prepared in step 3, until the resin impregnating liquid completely submerges the carbon fiber felt, and the impregnating time is 2 hours....

Embodiment 2

[0045] Step 1: Use PAN-based graphite felt as the main raw material, and control the density of the soft felt at 0.08g / cm 3 , the thickness is 10mm.

[0046] Step 2: Carbon fiber is longitudinally sewn into shape. The carbon fiber is PAN-based carbon fiber, and the number of tows is 3K. Place the foam board tooling 1 and other sizes on the bottom layer, and then lay 6 layers of PAN-based graphite felt 2, using barb needles 3 The carbon fiber (4) is vertically inserted into the soft felt, and each layer of the carbon fiber soft felt is connected with the carbon fiber to form a whole.

[0047] Step 3: Prepare resin impregnating solution, the resin is phenolic resin, the solvent is acetone, mix the resin and solvent in a weight ratio of 1:6, and stir evenly.

[0048] Step 4: Soak the sewn carbon fiber felt in the resin impregnating liquid prepared in step 3, until the resin impregnating liquid completely submerges the carbon fiber felt, and the impregnating time is 6 hours.

[...

Embodiment 3

[0056] Step 1: Use viscose-based carbon felt as the main raw material, and control the density of the soft felt at 0.14g / cm 3 , the thickness is 15mm.

[0057] Step 2: Carbon fiber is longitudinally sewn into shape, the carbon fiber is PAN-based carbon fiber, the number of tows is 6K, the size of the foam board tooling 1 is placed on the bottom layer, and then 4 layers of viscose-based carbon felt 2 are laid, using barbed needles 3. Insert the carbon fiber 4 longitudinally and vertically into the soft felt, and connect each layer of the carbon fiber soft felt with carbon fibers to form a whole.

[0058] Step 3: Prepare the resin impregnating solution, the resin is phenolic resin, the solvent is alcohol, mix the resin and solvent in a weight ratio of 1:15, and stir evenly.

[0059] Step 4: Soak the sewn carbon fiber felt in the resin impregnating liquid prepared in step 3, until the resin impregnating liquid completely submerges the carbon fiber felt, and the impregnating time...

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Abstract

The invention discloses a method for preparing a carbon fiber-sewed hard plate thermal insulation material. The method comprises the following concrete steps: 1, using of a carbon fiber soft felt as amain raw material; 2, longitudinal sewing molding of carbon fibers; 3, preparation of a resin impregnation solution; 4, resin impregnation; 5, curing treatment; 6, carbonizing treatment; 7, high temperature purifying treatment; 8, machining; and 9, surface coating treatment for producing the hard plate thermal insulation material. The carbon fiber longitudinal sewing molding process using the carbon fiber soft felt as the main raw material and a resin carbon matrix as a reinforcement is adopted to make the hard plate thermal insulation material with a low density and a certain mechanical strength, the hard plate thermal insulation material undergoes surface coating hole-sealing treatment to achieve the characteristics of low density, difficult layering, low thermal conduction coefficient,good high temperature stability and strong processability, and the process cost is low.

Description

technical field [0001] The invention relates to a preparation method of carbon fiber sewn hardened flat plate heat preservation material, which belongs to the technical field of heat field material accessories for high temperature furnaces. Background technique [0002] As one of the commonly used equipment in the fields of powder metallurgy, new materials, new energy, and national defense industry, high-temperature furnaces are widely used. Thermal field materials for high-temperature furnaces have dual functions of function and structure. As consumable parts, the annual consumption is huge. In recent years, due to the progress in the preparation technology of carbon / carbon composite materials and their excellent mechanical properties, thermal insulation properties, corrosion resistance, and air erosion resistance, the thermal field materials for high-temperature furnaces have gradually shifted from graphite materials to carbon / carbon composite materials. [0003] The inne...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/84C04B41/89
CPCC04B35/83C04B41/009C04B41/52C04B41/89C04B2201/20C04B2201/32C04B41/5001C04B41/4539C04B41/0072C04B41/5059C04B41/4531
Inventor 邵海成刘桂武赵立军乔冠军刘忻城张相召
Owner JIANGSU UNIV
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