Method and apparatus for producing carbon foam sheets

JP7828410B2Active Publication Date: 2026-03-11NIPPON KORNMEYER CARBON GROUP GMBH
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-10-07
Publication Date
2026-03-11

AI Technical Summary

Technical Problem

Existing methods for producing carbon foam sheets from starch or polymer mixtures face challenges in achieving uniform foaming without additional steam and often result in incomplete foaming or carbonization residues due to inappropriate temperature and environmental conditions.

Method used

A method involving spreading a thin layer of foamable starch or polymer powder on a heat-resistant sheet, introducing argon or nitrogen to create a controlled pressure, heating to a specific temperature range, and maintaining that temperature for extended periods to stabilize the foam, followed by carbonization and graphitization in an inert atmosphere.

Benefits of technology

This method ensures the production of microporous carbon foam sheets with uniform structure and consistent foaming, eliminating the need for additional steam and preventing decomposition, resulting in a reliable and efficient process.

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Abstract

To provide a method for producing fine-pored carbon foam boards having a mainly homogeneous structure regarding a method for producing carbon foam boards from starch for use as an insulation material or a filter.SOLUTION: The problem is solved by sprinkling at least one very thin layer of foamable starch powder 4' onto a temperature-resistant boardlike substrate 4, introducing the starch-powder-coated substrate into a furnace, introducing air, argon or nitrogen into the furnace until an internal pressure of about 720 mbar to about 1000 mbar has been established, heating the furnace 2 to a foaming temperature of 180°C to 450°C to foam the starch powder, maintaining the temperature over a prolonged duration of up to 10 hours to stabilize the foamed starch into a foam board 11.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • High porosity porous ceramics preparation method

    CN1736955A

  • Method and device for manufacturing three-element reinforcing member consisting of fusible plastic powder or powder mixture containing said powder

    JP1987119026A

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    JP2023004918A