US 2024/0254053 A1 · Method and apparatus for producing carbon foam boards

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.

Claims17

Dependent claims

A method for producing carbon foam boards, comprising:

sprinkling a layer of foamable starch powder onto a temperature-resistant boardlike substrate to form a starch-powder-coated substrate;
introducing the starch-powder-coated substrate 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;
and
maintaining the foaming temperature over a prolonged duration between 1 and 10 hours to stabilize the foamed starch into a foam board.

3 more elements

Dependencies are inferred from the claim text.

Method and apparatus for producing carbon foam boards

Life of this patent

Method and apparatus for producing carbon foam boards

Life of this patent

Abstract

Claims17