JPH0343005Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a ceiling material for automobile interiors.

Conventionally, ceiling materials for automobile interiors have been made by laminating thermoplastic resin films or sheets on both sides of a base material made of thermoplastic resin foam, and then pasting a covering material made of synthetic resin sheets, knitted fabrics, etc. on the interior surface. A combination of these is used.

However, conventional ceiling materials of this type have poor sound absorption properties, and as a result, the sound of rain on the roof when driving in the rain, and in the case of cars with a wire harness installed between the interior ceiling material and the ceiling of the car body, when driving in the rain. The problem is that the noise generated by the movement of the wire harness makes the driver and passengers feel uncomfortable, and may even cause a traffic accident.
Furthermore, it is also known that a sound-absorbing material layer made of polyurethane foam or the like is provided on a base material made of a synthetic resin foam or a laminate of a synthetic resin foam and a synthetic resin film (for example, Japanese Patent Laid-Open No. 51-112018 (Japanese Patent Application Laid-Open No. 58-67438, etc.). however,
In all of these, a sound-absorbing material layer is provided on the indoor side of the base material, and for this reason, there is a problem in that the base material is likely to rub against the ceiling of the vehicle body during driving, producing unpleasant noises.

The present invention was devised in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide a ceiling material for automobile interiors that has excellent sound absorption properties.

That is, the present invention has a base material made of styrene resin foam, and a sound-absorbing material made of a surface material layer provided on the interior surface and a soft foam provided on the surface in contact with the ceiling surface of the automobile body. The subject matter is a ceiling material for automobile interiors characterized by having a material layer.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the automobile interior ceiling material of the present invention, which has a base material 1 made of thermoplastic resin foam, and a covering material layer 2 provided on the indoor surface. , and a sound-absorbing material layer 3 provided on the surface that contacts the ceiling surface of the automobile body.

Examples of the styrene resin foam constituting the base material 1 include polystyrene, polyP-methylstyrene, styrene-maleic anhydride copolymer, styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer, and styrene-maleic anhydride copolymer. Examples include acrylonitrile copolymer, styrene-acrylonitrile-butadiene copolymer, and the like. These foams have a density
It is preferably about 0.035 to 0.105 g/cm ² .

The soft foam constituting the sound absorbing material layer 3 is preferably a soft urethane foam, and the thickness of the sound absorbing material layer 3 is preferably 2 to 20 mm. The facing material layer 2 is made of, for example, a synthetic resin sheet such as polyvinyl chloride, a knitted fabric, or the like.

The sound-absorbing material layer 3 and the base material 1, and the base material 1 and the facing material layer 2 are fixed and integrated through adhesive layers 4, 4, respectively, thereby forming the ceiling material of the present invention. The adhesive layers 4, 4 are formed by, for example, adhesive roll coating or extrusion of molten resin, and the mounting agent may be a heat-sensitive adhesive, a pressure-sensitive adhesive, an emulsion-type adhesive, a solvent-type adhesive, or the like. Can be mentioned.

In the ceiling material of the present invention, as shown in FIG. 2, the base material 1 can be reinforced by providing synthetic resin thin film layers 5, 5 on both sides of the base material 1 (and on one side, although not particularly shown). . the synthetic resin thin film layer 5,
Examples of the resin constituting the material 5 include the resins mentioned above as the base material 1. In this case, the resin constituting the synthetic resin thin film layers 5, 5 is a sound absorbing material,
In the case where the adhesive layer has adhesion to the facing material, the adhesive layers 4, 4 do not necessarily have to be provided.

Further, as shown in FIG. 3, by providing a cushioning material layer 6 on the inner surface side of the facing material layer 2, the cushioning properties of the indoor surface can be improved. The thickness of the cushioning material layer 6 is preferably about 2 to 5 mm, and examples of the cushioning material include soft urethane foam, polyethylene foam, and polypropylene foam. In addition, 7 in FIG. 3 is an adhesive layer that fixes the cushioning material layer 6 and the facing material layer 2.

The ceiling material of the present invention is formed by forming a laminate with a sound absorbing material layer 3 and a facing material layer 2 on the surface into a predetermined shape so that the sound absorbing material layer 3 is on the side that contacts the ceiling of the automobile body. As a result, the sound absorbing material layer 3
And/or the facing material layer 2 (and the cushioning material layer 6 if necessary) is formed by forming the base material 1 (or the base material 1 with the synthetic resin thin film layer 5 on both sides or one side) into a predetermined shape, and then The covering material layer 2 may be attached to the side where the material layer 3 contacts the ceiling surface of the automobile body so that it is located on the indoor side.

As explained above, the automobile interior ceiling material of the present invention has excellent sound absorption properties by providing a sound-absorbing material layer made of soft foam on the surface that contacts the ceiling surface of the automobile body. This has the effect of greatly reducing the amount of noise, etc., and allows the driver and fellow passengers to drive comfortably.
In addition, since a sound-absorbing material layer is provided on the side of the base material made of styrene resin foam that contacts the ceiling surface of the automobile body, even if the base material is made of styrene resin foam, which tends to produce unpleasant noises when rubbed, This has the advantage that there is no risk of the base material rubbing against the automobile ceiling material and producing unpleasant noises when the vehicle is running.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic longitudinal cross-sectional view of one embodiment of the ceiling material for automobile interiors of the present invention, and FIGS. 2 and 3 show other embodiments of the ceiling material of the present invention. It is a longitudinal cross-sectional view of the main part. 1... Base material, 2... Surface material layer, 3... Sound absorbing material layer.

Claims (1)

[Scope of utility model registration request] It has a base material made of styrene resin foam, and has a surface material layer provided on the interior surface, and a sound absorbing material layer made of soft foam provided on the surface that contacts the ceiling surface of the automobile body. A ceiling material for automobile interiors characterized by having the following characteristics: