A manufacturing method of a sound insulating layer by application of raw materials for urethane resin, by applying row materials for urethane resin in their liquid states along a surface of a porous layer of a soundproof body to manufacture as the sound insulating layer.

A flooring assembly comprising at least one first lofted lapped or airlaid bulk absorber layer 14 for acoustic absorption and compression resistance; at least one impedance layer 16 for one or more of acoustic impedance, compression resistance, and stiffness; at least one second lofted lapped airlaid bulk absorber layer 18 for acoustic absorption and compression resistance; and one or more optional densified fibrous air-flow resistive layers 12, 20.

The present invention discloses a silencer for automobile. The silencer is formed by press molding. The silencer has a first molded surface and a second molded surface which are opposite to each other in a thickness direction. The silencer at least includes a first fiber layer on which the first molded surface is formed and a second fiber layer integrated with an opposite surface to the first molded surface, the opposite surface being on the first fiber layer. Fibers of the second fiber layer exist partly on the opposite surface on the first fiber layer.

Multilayer sound attenuating trim part for a vehicle, in particularly for a trim part or cladding used in the interior of a car, for instance as an inner dash or as part of the floor covering or for the exterior of a vehicle, for instance as a trim part or cladding in the engine bay area or as part of an under body trim part as well as to the method of producing a part, comprising at least two fibrous layers (10, 30) and at least one air permeable intermediate film layer (20) between the at least two fibrous layers, whereby all layers together have a variable thickness.

Automotive noise attenuating trim part comprising at least a porous layer whereby the porous layer comprises at least one closed container partly filled with loose particles, whereby the closed container comprises a contact surface formed by a film for contacting a vibrating surface of the vehicle and whereby the surface of the film opposite the contact surface is in contact with at least part of the loose particles, such that the film can transfer vibrational energy from the vibrating surface to the loose particles inside the container.

The invention relates to a motor vehicle floor having a lower floor made from a composite material; and an upper floor made from a composite material, extending opposite at least part of the lower floor, the lower and upper floors being connected to one another. The floor includes at least one cavity at least partially delimited by the lower or upper floor and communicating with the exhaust line of the motor vehicle.

A shielding device of a passenger compartment of a motor vehicle for shielding an interior of the passenger compartment from a hydrogen tank in the motor vehicle includes a basic body. The basic body has a fiber-reinforced composite material with a hydrogen-permeation-inhibiting coating. The basic body is constructed as a wall or wall segment of the passenger compartment.

A flooring assembly comprising a plurality of flooring units each unit comprising a first stability core layer having a top surface, a bottom surface and a plurality of edge surfaces, at least two of the edge surfaces having an interlocking mechanism for attachment to the edge surfaces of the first stability core of adjacent flooring units; a sound attenuating acoustic layer attached to the top surface of the first stability core layer, a second stability core layer attached to the top surface of the acoustic layer and having a top surface, a bottom surface and a plurality of edge surfaces, at least two of the edge surfaces having an interlocking mechanism for attachment to the edge surfaces of the second stability core of adjacent flooring units; and a finish layer attached to the top surface of the second stability core layer, wherein (1) each of the layers is polygonal, and the assembly of flooring units is attachable to a surface of a structure.

A floor carpet is placed on a floor panel forming a cabin floor surface. The floor carpet comprises a skin layer which is configured to block an airflow therethrough and a sound-absorption layer which is made of a sound-absorption material and configured to allow an airflow therein, the sound-absorption layer being provided below the skin layer to contact the floor panel at a lower face thereof. A space between the skin layer and the floor panel (a space portion where the sound-absorption layer is arranged) is sealed with a seal member which is configured to surround the sound-absorption layer. The seal member is pressed against the floor panel (tightly) by a pressing member which is fixed to a vehicle-body side with a fixing tool.

The disclosed acoustic insulator mat includes a first absorber layer made of a non-woven fibrous material. The non-woven fibrous material comprises a mesh of intertwined fibers that defines a plurality of cavities. The first absorber layer has a first side and a second side. Peripheral cavities are arranged along the second side of the first absorber layer between peripheral fibers. A coating is disposed on the second side of the first absorber layer. The coating is adhered to the peripheral fibers and thus includes a plurality of discontinuities at the peripheral cavities such that the coating provides a partial barrier to noise at the second side of the first absorber layer. The acoustic insulator mat may optionally include a second absorber layer that is retained on the first absorber layer by the coating. A method of manufacturing the acoustic insulator mat is also disclosed.