FIELD: structural materials.
SUBSTANCE: invention relates to structural materials and relates to fire-resistant and sag resistant acoustic panel. Panel comprises a fireproof mat. Fireproof mat includes a fireproof fibrous component and binding material which binds the fibers. Fireproof fibrous component contains natural fibers treated with a fire retardant. Ceiling panel structure has flame propagation index of 25 or less and smoke generation factor of 50 or less according to ASTM E 84 measurements, which are homogeneous throughout the mat.
EFFECT: invention provides creation of a form-stable acoustic panel having fire resistance class A throughout the panel.
6 cl, 3 tbl, 2 dwg
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