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Preparation method of high-temperature composite sealing material

A compound sealing and high-temperature technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of complex preparation process, high cost, unsuitable, etc., and achieve the effect of simple process flow, high product strength and strong corrosion resistance

Inactive Publication Date: 2014-02-19
SHANXI ZHIKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, bulk density 1.0g / cm 3 The mechanical strength of left and right flexible graphite products is generally only 3.0-5.5MPa, so it is not suitable for use under high pressure, and cannot meet various sealing conditions, and the scope of use is limited
Patent Application No. 96101062.2 Carbon / carbon composite sealing material and the raw materials in its preparation are mixed using a double-roller rubber mixer, and the carbon / carbon composite sealing material is prepared by cold pressing and hot pressing molding methods. This method is easy to mix carbon fiber Crushed, complex preparation process, high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step, preparing a dispersant; dissolving polyvinyl alcohol in an ethanol solution with a concentration of 99.9%, the ratio by weight of polyvinyl alcohol to the ethanol solution is 0.3:100, to obtain a dispersant;

[0023] The second step, take the PAN carbon fiber, flexible graphite worm and resin binder that are 3mm in length by weight, PAN carbon fiber: flexible graphite worm: resin binder=3:65:32, first get the PAN carbon fiber and add the first step In the obtained dispersant, the ratio by weight of the PAN carbon fiber to the dispersant is 3:45, stir, and after the carbon fiber is uniformly dispersed in the dispersant, add the flexible graphite worm, stir, and make the flexible graphite worm and carbon fiber Mix evenly in the dispersant; then put the obtained mixed liquid into a centrifuge to remove 80% to 90% of the water; finally put the water-removed material into the double-twisted knife kneading pot, add the resin Binder, kneading for 15 minutes;

...

Embodiment 2

[0030] The first step, preparing a dispersant; dissolving polyvinyl alcohol in an ethanol solution with a concentration of 99.9%, the ratio by weight of polyvinyl alcohol to the ethanol solution is 0.8:100, to obtain a dispersant;

[0031] The second step, take pitch-based carbon fibers, flexible graphite worms and resin binder with a length of 5mm by weight, pitch-based carbon fibers: flexible graphite worms: resin binder=5:67:28, first take pitch-based carbon fibers and add In the dispersant prepared in one step, the weight ratio of the pitch-based carbon fiber to the dispersant is 5:100, stir, and after the carbon fiber is uniformly dispersed in the dispersant, add the flexible graphite worm and stir to make the flexible graphite worm Graphite worms and carbon fibers are uniformly mixed in a dispersant; then the mixed liquid is put into a centrifuge to remove 80% to 90% of the water; finally, the water-removed material is put into a double twister kneading pot, and added De...

Embodiment 3

[0034] The first step, preparing a dispersant; dissolving methylcellulose in distilled water, the ratio of methylcellulose to distilled water in parts by weight is 0.3:100 to obtain a dispersant;

[0035] The second step, take the PAN carbon fiber, flexible graphite worm and resin binder that length is 3mm by weight, PAN carbon fiber: flexible graphite worm: resin binder=6:70:24, first get the chopped carbon fiber and add the first step In the prepared dispersant, the ratio by weight of the PAN carbon fiber to the dispersant is 6:100, stir, and after the carbon fiber is uniformly dispersed in the dispersant, add the flexible graphite worm, stir, and make the flexible graphite worm and The carbon fiber is uniformly mixed in the dispersant; then the mixed liquid obtained is put into a centrifuge to remove 80% to 90% of the water; finally, the material from which the water has been removed is put into a double twisted kneading pot, and the above-mentioned Resin binder, kneading f...

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Abstract

The invention discloses a preparation method of high-temperature composite sealing material, which belongs to the technical field of a preparation method of high-temperature composite sealing material. The technical problem to be solved is to provide a preparation method of high-temperature composite sealing material with the advantages of simple process flow, low cost, high strength and long service life. The method adopts the technical scheme that the method comprises the following steps: firstly, preparing dispersant, secondly, stirring short carbon fiber, flexible graphite worms and resin glue according to part by weight, removing moisture, and mixing, thirdly, drying, fourthly, performing cold press molding, so as to obtain samples, fifthly, restraining and curing the samples, sixthly, sintering the samples, and seventhly, performing natural cooling and then performing surface treatment on the samples, so as to obtain products. The method is mainly applied to preparing high-temperature composite sealing material.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature composite sealing material, which belongs to the technical field of preparation methods of a high-temperature composite sealing material. Background technique [0002] Sealing is a wide-ranging industrial field, from chemical industry, machinery, power generation to weapons, there are sealing problems. Sealing is often the key to determine whether a device can be used normally, and it is often related to human safety. Therefore, how to better solve the sealing problem has always been a research topic. Non-metallic sealing materials have gone through several stages such as asbestos packing, carbon fiber packing, and flexible graphite. [0003] As a new generation of non-metallic sealing materials in my country, flexible graphite dense materials have the characteristics of high temperature resistance, radiation resistance, corrosion resistance, special flexibility, excellent compression...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10C08L83/04C08L101/00C08K13/04C08K7/06C08K3/04B29C67/04B29C43/00
Inventor 张志刘超
Owner SHANXI ZHIKE TECH
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