Abstract: The vehicle interior material of the present invention has a multilayer structure, the material including: a hard core layer having a hollow portion inside; a design layer provided on one surface side of the core layer; a first film layer provided between the core layer and the design layer; and a second film layer provided on a surface of the core layer on a side opposite to the first film layer, wherein a strain ca is smaller than a strain ?b, the strain ?a being a strain on a surface of a structure on a side of the first film layer, the structure having the first film layer, the core layer, and the second film layer, and the strain ?b being a strain on a surface of the structure on a side of the second film layer.

Abstract: There is provided a vibration damping material capable of exhibiting excellent vibration damping performance and of reducing its own weight while having high rigidity. The vibration damping material of the present invention used so as to be installed on a panel of a vehicle includes a viscoelastic layer and a constraining layer provided on one surface of the viscoelastic layer, wherein a relationship between a strain ?a and a strain ?b is 0<?a/?b<1, the strain ?a being a strain on a surface of the constraining layer on the opposite side to the viscoelastic layer, and the strain ?b being a strain on a surface of the constraining layer on a side in contact with the viscoelastic layer.

Abstract: There is provided a sound-absorbing material for a vehicle, capable of stably yielding desired sound absorption performance while reducing weight of the sound-absorbing material for a vehicle. The sound-absorbing material for a vehicle of the present invention has a multilayer structure, including: a core layer in which tubular cells are arranged in a plurality of rows; and an airflow-blocking resin film layer adhered to one surface of the core layer. The relationship between the Young's modulus E (MPa) of the airflow-blocking resin film layer 40 and the surface density M (g/m2) of the layer structure on the first airflow-blocking resin film layer 40 side with respect to the core layer 10 is 0.5<E/M<21.

Abstract: There is provided a sound-insulation material for a vehicle that can reduce the weight thereof and exhibit sufficient sound insulation performance against noise of 500 Hz to 6400 Hz generated in vehicles. The sound-insulation material for a vehicle, of the present invention, includes: a core layer having tubular cells, the tubular cells being arranged in a plurality of rows; an airflow-blocking resin film layer provided on one surface of the core layer; and a decoupling layer provided on the airflow-blocking resin film layer; and an average (P/v)/Za is 2.8 to 10 between 500 and 6400 Hz, where: P and v are respectively a sound pressure and a particle velocity on a surface of the airflow-blocking resin film layer provided on the core layer, the surface being opposite to the core layer; and Za is an acoustic impedance of the decoupling layer.

Abstract: A sound-absorbing material for vehicles that is mounted to a vehicle interior and that is provided with a main body in which at least a fibrous material and a skin material are integrally molded. The sound-absorbing material for vehicles is characterized in that a sound-absorbing section provided to at least part of the main body is formed so as to be mounted to the vehicle interior within a range in which the vertical distance Elh from the lower surface of the head rests of the front seats downward is 0.1-0.4 m, and in that the air flow resistance AFR (Ns/m3) and the vertical distance Elh (m) satisfy 210<AFR+10/Elh<3020.

Abstract: A sound-insulation material for a vehicle has high rigidity and is capable of exhibiting sufficient sound insulation performance against noise having a frequency of 500 Hz to 5000 Hz generated in a vehicle, while maintaining low weight. The sound-insulation material for a vehicle of the present invention has a multilayer structure, the material including: a hard layer having tubular cells, the tubular cells being arranged in a plurality of rows; and a soft layer provided on one surface of the hard layer, in which a ratio of a dynamic spring constant Kd to a static spring constant Ks, of a structure having the hard layer and the soft layer, is 0<Kd/Ks?1.5.

Abstract: There is provided an automobile component capable of improving sound absorption performance by damping due to vibration of a thin film as well as reducing weight of the automobile component. An automobile component of the present invention includes a core layer 10 in which tubular cells 20 are arranged in a plurality of rows, and a nonwoven fabric layer 30 on one or both surfaces of the core layer. The cells have closed surfaces 21 and open ends 22 in every other row as cell ends on one surface of the core layer. As cell ends on the other surface of the core layer, the cells have open ends 22 in the rows where the cells have the closed surfaces as cell ends on the one surface, and have closed surfaces 21 in the rows where the cells have the open ends as cell ends on the one surface. The open ends 22 allow the internal space of the cells 20 to be in communication with the outside. A thin resin film layer 40 having a plurality of apertures is provided between the core layer and the nonwoven fabric layer.