1. The flame-retardant polyester fiber sound absorbers are harder and heavier than ordinary polyester fiber sound absorbers. There is no difference in weight between flame retardant polyester fiber sound-absorbing boards and boards that have not been generally treated.

2. Polyester fiber sound absorption board with high density. The density of polyester fiber sound-absorbing board must be high, this material polyester fiber sound-absorbing board, not only the pure color, easy to chamfer, no fluff ball, but also very texture, a lot of high-grade.

3. Treatment technology of flame retardant polyester fiber sound absorption board. There are many processes for the flame-retardant treatment of polyester fiber sound-absorbing panels, and the flame-retardant effect of the sound-absorbing panels made is also very different.