A novel high temperature and flame resistant Twaron aramid foam
March 26-31, 2017
Para-aramid fibers (e.g. Twaron) are well known for their high strength, high heat and flame resistance. The newly developed aramid syntactic foam consists of a Twaron para-aramid matrix and hollow glass spheres. It shows an excellent heat stability up to 450 °C. In heat resistance tests at 1200 °C there was virtually no smoke development and a good form retention. Fire protection tests showed that aramid foam is nearly non-combustible and that even a non-combustible grade can be made. The density of the foam ranges typically from 200 to 300 kg/m3, depending on the aramid-glass ratio. It also has a low moisture absorption of only 1.5% at 70 °C and 85% relative humidity. The high temperature resistance and good form retention of the aramid foam makes it a suitable candidate to use as a core for sandwich structures with thermoplastic facings, e.g. PEEK/carbon. The foam can also be applied for fire protection, e.g. in fire retardant doors, bulkheads or hatches in naval or industrial applications.
Ruud Heijmans, "A novel high temperature and flame resistant Twaron aramid foam" in "Syntactic and Composite Foams V", Gary M. Gladysz (Empyreus Solutions, LLC, USA) Krishan K. Chawla (University of Alabama at Birmingham, USA) Aldo R. Boccaccini (University of Erlangen-Nuremberg, Germany) Manabu Fukushima (National Institute of Advanced Industrial Science and Technology (AIST), Japan) Eds, ECI Symposium Series, (2017). http://dc.engconfintl.org/syntactic_composite_foams_v/2