Alufon aluminium panel, 1.5 mm bi-absorbent

Sound absorbing panel consisting of two cold formed 1.5 mm aluminium alloy sheets assembled with a bayonet coupling so that no screws are needed. The standard measurements of the box-type structure, with a bearing and sound absorbing function, are 2960 x 500 x 105 mm; it is first pretreated with a dip cycle and then finished with a polyester powder paint polymerised in the oven at 200°C to guarantee resistance against the elements. The sound abatement function - to ensure the very best sound absorption properties near the most polluting sound sources - is guaranteed by two mineral fibre panels with a density of 90 kg/m³ and 120 kg/m³. Each of them is 30 mm thick and they are mounted centrally in relation to the box element. The part of each panel exposed to drilling is backed by resined, water repellent, siliconed glass fibre to ensure resistance and duration against the elements and ultraviolet rays. The front and the rear aluminium elements are drilled with an empty-to-solid ratio of about 33% of the surface with 10 mm diameter holes and a 14 mm pitch to enhance the sound absorption properties. The sides of the panels are closed with talc-filled polypropylene heads that ensure their durability, resistance to temperatures, resistance to the elements and a perfect seal between the panel and the barrier’s bearing structure. These panels are assembled one on the other with a tongue and groove fitting along their whole length.

Acoustic certifications in category A4-B2.

Alufon panel dimensions:

A - drilled side of the panel in aluminium 1.5 mm (10 mm hole, 14 mm pitch, 60° angle, 33% solid-to-empty ratio) B - drilled side of the panel in aluminium 1.5 mm (10 mm hole, 14 mm pitch, 60° angle, 33% solid-to-empty ratio) C - 30 mm thick rock wool,  120 kg/m3 density D - 30 mm thick rock wool, 90 kg/m3 density

Sound-insulating power (R)		Sound absorption coefficient (αs)
Technical sound insulating characteristics		Technical sound absorbing characteristics
Rw = 19 dB DLR = 16 dB Category B2 Classification in accordance with the UNI EN 1793-2:1999		DLα = 12 dB Category A4 Classification in accordance with the UNI EN 1793-1:1999

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