Bpb Limited

Placoplatre

Pascal Ozouf

Marc Rehfeld

David Fournier

Andre Rivaud

Jean-Pierre Klein

A laminated acoustic building panel comprises a pair of plasterboard substrates which are bonded together by an adhesive layer, the panel having a dynamic Young's modulus of 0.1 to 5 GPa and a damping loss factor of 5-30% (&#x3b7;=0.05-0.3), and the ratio of the adhesive to the applied surface area of the substrates being 80-250 g/m2. The laminated panel is relatively soft in construction and hence sound waves caused by knocking or impact noise is surprisingly damped using considerably less adhesive than known panels. The use of soft substrates and less adhesive significantly reduces the weight of the panel. Furthermore, the use of less adhesive significantly reduces costs and makes production easier.

Laminated acoustic soundproofing panel

A suspender bottom bracket for ceiling frameworks, includes a support wall that is adapted to be fastened to a rod of the suspender and is extended by two flanges in parallel planes that each have a rim parallel to the support wall, the two rims being directed toward the interior of the volume encompassed by the support wall and the planes of the flanges. The rims have at their end a fixing lug, the fixing lugs being on the opposite side of the support wall relative to the rims, perpendicular to the support wall, and are offset in a direction parallel to the planes of the flanges by a distance sufficient to provide a passage for the framework. The flanges that extend from the support wall as far as the rims have the overall shape of parallelograms.

Suspender bottom bracket for ceiling frameworks, a suspender having this kind of bottom bracket, and an assembly comprising a sealing framework and at least one such suspender

Growing community of inventors

Champs sur Marne, France

Pascal Ozouf