Reapor® glass foam

Reapor® glass foam

© Photo Fraunhofer IBP

Sintered, open porous inorganic foams – a contradiction?

An increased demand of industry for non-fibrous absorber materials for immission control allowed the development of new open porous materials. In the 1980s already, a mineral organic plaster foam on the basis of REA-plaster, a secondary raw material from flue gas desulphurization, water and a pre-polymer was formulated, which is successfully used as sound absorber in partition wall construction systems for offices nowadays.

In the last few years, a method was developed by means of which non-combustible inorganic foams (REAPOR®) can be produced with a defined adjustable micro- and macro-porous structure, whose characteristics may be adjusted to various requirements.

These light materials are mechanically loadable, non-combustible and adjusted to recycling processes. They have a high sound absorption quality, a low thermal conductivity, a good chemical resistance, and they are easy to handle. According to the design of the REAPOR® porous structure, broadband sound absorbers for firm track systems of railed vehicles or high-quality thermal insulating masonry plates may be realized.

Reapor® glass foam

Sintered, open porous inorganic foams – a contradiction?

© Photo Fraunhofer IBP

Low-cost silicious light aggregates, i.e. inflated glass granulate material of recycled glass, are coated with hydrous sinter additives during the manufacturing process. By means of conventional shaping methods (compression moulding etc.), moulded padding can be made of this mouldable compound. The light aggregates are sintered by liquid phase sintering after drying, so that compared to conventional sintering processes the microscopic as well as the macroscopic porous structure of the green body is maintained. The formation of cavities between the light aggregate granulate material allows a high mechanical stability.

Reapor® glass foam

Sintered, open porous inorganic foams – a contradiction?

Scope of Application  Example
sound insulation  flexible room partition systems, absorbers for power plants
thermal insulation  light masonry, thermal insulation compound systems
fire resistance fire dampers
furnace construction  chimney insulating stones
vehicle construction  crash absorber
biochemical engineering  catalytic converters
biomedical technology  resorbable implants
 ... ...