Method and apparatus for producing carbon foam boards
AssigneeNippon Kornmeyer Carbon Group GmbH
InventorsDavid Klein, Michael Gerads
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Abstract
A method for producing carbon foam boards from starch for use as an insulation material or a filter is disclosed. The method is suitable for producing fine-pored carbon foam boards having a mainly homogeneous structure. This is achieved by sprinkling at least one very thin layer of foamable starch powder onto a temperature-resistant boardlike substrate, introducing the starch-powder-coated substrate into a furnace, introducing air, argon or nitrogen into the furnace until an internal pressure of ≈720 mbar to ≈1000 mbar has been established, heating the furnace to a foaming temperature of 180° C.-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.
Claims11
A method for producing carbon foam boards, comprising:
- sprinkling a dry layer of foamable starch powder onto a temperature-resistant substrate board to form a starch-powder-coated substrate board;
- introducing the starch-powder-coated substrate board into a furnace;
- introducing argon or nitrogen into the furnace to displace air or pumping out air from the furnace until an internal pressure of 720 to 1000 mbar has been established;
- heating the furnace to a foaming temperature between 180° C. and 450° C. and thereby foaming the starch powder on the starch-powder-coated substrate board;
- and
- maintaining the foaming temperature over a prolonged duration between 1 and 10 hours to stabilize the foamed starch into a foam board.
Dependencies are inferred from the claim text.