... the material was light, sound absorption, thermal insulation, fire retardant, stability, good low temperature flexibility, good air permeability, ... properties: 1.Sound Absorption 2. The flame-retardant Groupeve Melamine foam without any flame retardants or ... the DIN5510 fire certification. ★Meet the China National Standards GB/T8624-2006 Class B (flame retardant grade) flame retardant standards. ...