Saint-gobain Glass France

Saint-gobain Weber France

Bpb Limited

Saint-gobain Sekurit France

Saint-gobain Weber

David Fournier

Marc Rehfeld

Corinne Payen

Sylvain Payot

Pierre Boyadjian

Serge Rimlinger

Michele Curt

Cedric Chaveyriat

Jean-Philippe Boure

Pascal Ozouf

Cédric Chaveyriat

Michèle Curt

A viscoelastic plastic interlayer intended to be incorporated between two glass sheets to form a laminated glazing with vibro-acoustic damping properties, the interlayer comprising at least one layer made of viscoelastic plastic with vibro-acoustic damping properties, the interlayer being such that the resonant frequency fof the second resonance mode of a laminated glazing bar with a surface area of 25 mm&#xd7;300 mm composed of two glass sheets each 2.1 mm thick, between which is incorporated the interlayer, determined by measuring the mechanical impedance (MIM) at 20&#xb0; C. according to standard ISO 16940, is between 760 Hz and 1000 Hz and the loss factor &#x3b7;of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25.

Viscoelastic plastic interlayer for vibroacoustic damping and glazing comprising such an interlayer

A viscoelastic plastic interlayer can be incorporated between two glass sheets to form a laminated glazing with vibro-acoustic damping properties. The interlayer includes at least one layer made of viscoelastic plastic with vibro-acoustic damping properties. The interlayer is tinted in the bulk at least on a part of its surface. The interlayer is such that the resonant frequency fof the second resonance mode of a laminated glazing bar with a surface area of 25 mm&#xd7;300 mm composed of two glass sheets each 2.1 mm thick, between which is incorporated the interlayer, determined by measuring the mechanical impedance (MIM) at 20&#xb0; C. according to standard ISO 16940, is between 760 Hz and 1000 Hz and the loss factor &#x3b7;of the second resonance mode of the bar, determined by MIM under the same conditions, is greater than or equal to 0.25.

Viscoelastic plastic interlayer for vibro-acoustic damping and glazing comprising such an interlayer

A laminated glazing used as a head-up display screen includes two sheets of glass and a viscoelastic plastic interlayer arranged between the sheets of glass. The interlayer includes at least one layer made of viscoelastic plastic with vibro-acoustic damping properties. The interlayer has a cross section that decreases in a wedge shape from the top to the bottom of the glazing. A resonant frequency fof the second resonance mode of a laminated glazing bar with a surface area of 25 mm&#xd7;300 mm composed of two glass sheets each 2.1 mm thick, between which is incorporated the interlayer, determined by measuring the mechanical impedance (MIM) at 20&#xb0; C. according to standard ISO 16940, is between 760 Hz and 1000 Hz and the loss factor &#x3b7;of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25.

Laminated glazing for use as a head-up display screen

The invention relates to a method for selecting a viscoelastic plastic interlayer including two outer layers and a central layer that can be incorporated between two glass sheets of a glazing unit, the method includes providing first and second components that constitute respectively the central layer and the outer layers, measuring the shear modulus G' of the first and second components, selecting the material of the second component only if G&#x2032;&#x2267;3&#xd7;10Pa at 20&#xb0; C. and between 100 Hz and 240 Hz, and setting the thickness h of the first component so that h is between 0.31 mm and 1.20 mm and so that g=G&#x2032;/h is between 5.58&#xd7;10Pa/m and 2.37&#xd7;10Pa/m at 20&#xb0; C. and between 100 Hz and 240 Hz.

Method for selecting an interlayer for vibroacoustic damping, interlayer and glazing unit comprising such an interlayer

A tile made of a tile body and, joined to a face thereof, a layer of damping material conferring vibratory energy dissipation properties on the tile.

Tile for a covering with enhanced acoustic properties

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 glazing unit having improved vibroacoustic damping properties, including: at least one glass sheet; at least one vibroacoustic damping strip, the strip including at least one element made of damping material and the strip being fastened to one of the faces of the glass sheet. The face of the strip facing the glass sheet has a surface area in contact with the glass sheet which is strictly inferior to the surface area of the face of the strip facing the glass sheet. The glazing unit makes it possible to damp noise and vibrations while taking up little space.

Glazing unit with improved vibroacoustic damping properties, method for making such a glazing unit and method for acoustic protection in a vehicle passenger compartment

An acoustic enhancement device adapted for being placed on a support and under a covering, and containing a first flexible layer adapted for being placed facing the support, a second rigid layer joined to the first flexible layer and adapted for being placed opposite the support, and a damping element, wherein the damping element is integrated in the second rigid layer or forms a third layer placed on the second rigid layer and opposite the first flexible layer.

Acoustic enhancement device for underlayment of a covering

A glazing unit with improved vibro-acoustic damping properties, including at least one glass sheet and at least one vibro-acoustic damping strip fastened onto at least one of faces of the glass sheet and that includes at least one element made of damping material having a loss factor of at least 0.4 and a Young's modulus of less than 200 MPa at 20&#xb0; C. for frequencies below 5000 Hz. The strip also includes at least one weighting element that has a linear mass of greater than 0.05 kg/m and is fastened onto the element made of damping material, the element made of damping material being inserted between the glass sheet and the weighting element, and no device other than the glazing unit being joined to the strip.

Glazing unit with improved vibro-acoustic damping properties, method for making such glazing unit and method for acoustic protection in a vehicle passenger compartment

A glazing unit with an improved vibroacoustic damping property including at least one sheet of glass and at least one vibroacoustic damping strip that is attached to at least one of the faces of the glass sheet and that includes at least one component made of damping material having a loss factor greater than 0.2. The strip is not joined to any other device on the opposite side from the glass sheet and the component made of damping material has a Young's modulus greater than 800 MPa, at 20&#xb0; C., for a particular frequency corresponding to the critical frequency of the glazing unit to within plus or minus 30%.

Glazing unit having an improved vibroacoustic damping property, process for manufacturing such a glazing unit and process for acoustic protection in a vehicle passenger compartment

Growing community of inventors

Breteuil, France

David Fournier