JPH0357470Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a soundproofing material installed inside a vehicle, such as a dart silencer, or a floor carpet that also has a decorative function.

(Prior Art) Various interior materials having a soundproofing function are used inside vehicles such as automobiles. For example, they are a dart silencer for the purpose of soundproofing in a dash panel section, or a floor carpet for the purpose of decoration and soundproofing on the floor.

The soundproofing materials for vehicles that have been conventionally used include:
As shown in the cross-sectional view of Fig. 4, the dash panel,
Alternatively, a sheet material such as a plastic sheet or a carpet material 10 such as a textile is written on a felt 12 laid on the vehicle floor panel P, and the sheet material 10 is simply written on the felt 12, or It is only partially fixed with clips or the like.

By the way, the effect 12 laid on the dash panel P etc. may not follow the shape of the panel due to its rigidity and variations in work, etc., and the effect 12 may not follow the shape of the panel in uneven parts. It often happens.

(Problem that the invention aims to solve) However, if the soundproofing material is lifted up from the dash panel, etc. It also causes problems. Further, with conventional soundproofing materials, there is a problem in that it is not easy to align the felts, sheet materials, etc. correctly when attaching them to the panel P.

This invention aims to solve these problems.

(Means for Solving the Problems) The soundproofing material for vehicles according to this invention consists of a base material consisting of a single layer or multiple layers, in which at least one layer is an impregnated layer formed by impregnating a synthetic resin foam with a resinous viscous liquid. A skin material is pressure-bonded to the surface via a heat-effect resin layer to form a desired three-dimensional shape, and the adhesion between the base material and the skin material and fixation of the three-dimensional shape are
It is characterized by curing of the thermosetting resin layer, and conforms to the shape of the attachment site.

(Function) The soundproofing material for a vehicle according to this invention is mounted directly on a dashboard panel, floor panel, etc. of a vehicle. At this time, since the vehicle soundproofing material has a three-dimensional shape that conforms to the shape of the mounting site, it can be placed closely on the dash panel or the like without any gaps. As a result, the soundproofing and decorative functions can be fully demonstrated, and the cabin space does not become particularly narrow. Furthermore, since the impregnated layer formed by impregnating a synthetic resin foam with a resinous viscous liquid is used as one layer of the base material, it has an excellent soundproofing function and an excellent vibration damping function.

(Example) This invention will be explained below based on examples.

1 to 3 show a first embodiment 20, a second embodiment 30, and a third embodiment of the soundproofing material for vehicles according to this invention.
FIG. 12 is a sectional view of a main part of Example 40.

The vehicle soundproofing materials 20, 30, 40 include a base material 21,
31, 41 and the skin materials 25, 35, 45 are crimped together via the thermosetting resin layers 23, 33, 43 to form a three-dimensional shape that conforms to the shape of the installation site in the vehicle, for example, the shape of a dash panel. It is shaped and has a predetermined thickness.

The base material has at least one layer made of an impregnated liquid obtained by impregnating a synthetic resin foam with a resinous viscous liquid. It may consist of one layer or multiple layers. As the synthetic resin foam, a flexible synthetic resin foam such as a soft polyurethane foam in the form of a sheet having a predetermined thickness is used, and among these, one having a high proportion of continuous pores is preferable. As the resinous viscous liquid, asphalt, butyl rubber latex, waxes, etc. are used. Impregnation with a resinous viscous liquid can be achieved, for example, by applying asphalt to the surface of the synthetic resin foam while compressing it with a roller, stopping the compression after application, and then heating it to asphalt. This can be done easily and uniformly by lowering the viscosity of . Here, the base material 21 of the first embodiment is composed of a single layer of only an impregnated layer, and the base material 31 of the second embodiment is composed of two layers of an impregnated layer 31a and an asphalt sheet 31b.
The base material 41 of the third embodiment consists of two layers: an impregnated layer 41a and a brick 41b. Other layers constituting the base material include plastic films, synthetic resin foam sheets, etc., which are selected as appropriate depending on the soundproofing properties, moldability, cushioning properties, etc. required for the soundproofing material for vehicles. Used in combination. And if it is multi-layered,
The layers are integrated by applying a thermosetting resin or adhesive, which will be described later, to the laminated surfaces.

The thermosetting resin layers 23, 33, and 43 are formed by applying a thermosetting resin to the surface of the base material (21, etc.), and depending on the material of the base material to which it is applied, The surface is partially impregnated. Note that it is preferable to provide the thermosetting resin layers 24, 34, and 44 on the other surface of the base material, and further on the laminated surface of each layer of the base material, from the viewpoint of fixing the three-dimensional shape of the soundproofing material for a vehicle. A polyurethane prepolymer is suitable as the thermosetting resin. For example, molecular weight
1000-3000 polypropylene glycol 4,
These are polyurethane prepolymers having isocyanate at the terminals, which are made by adding an excess amount of 4' diphenylmethane diisocyanate. The reaction of this polyurethane prepolymer is initiated or accelerated by heating in the presence of water or an aqueous amine solution and cures.
etc.) and fixes the three-dimensional shape.

As the skin materials 25, 35, 45, rubber sheets, plastic sheets, plastic films, synthetic resin foam sheets, paper, textiles, etc. may be used individually, taking into consideration the texture, decorativeness, moldability, cushioning properties, etc. of the interior of the car. Or used in selected combinations.

Note that 47 in the third embodiment 40 is a hole for pulling in harnesses.

The production of a soundproofing material for vehicles having such a structure involves applying a thermosetting resin, such as a polyurethane prepolymer, to the surface of the sheet-shaped base material (21, etc.) using a brush, spray, or roller. A resin layer (23, etc.) is formed, a skin material (25, etc.) is laminated on the base material via the thermosetting resin layer, and in the presence of water or an amine aqueous solution, a mold surface consisting of the shape of the installation site inside the vehicle is formed. This is carried out by hot pressing the laminate in a mold having the following properties. By the hot press, the skin material is pressed onto the surface of the base material, and the laminate of the skin material and the base material is compressed to a predetermined thickness, deformed, and shaped into the shape of the mold surface, that is, the shape of the attachment site. Ru. Then, by reaction curing of the thermosetting resin layer, adhesion, shape fixation, and thickness fixation between the skin material and the base material are achieved. When the base material consists of multiple layers, each layer is made integral with an adhesive in advance, or a thermosetting resin layer is provided between each layer, and the layers are made integral during hot pressing.

Note that the compression ratio during hot pressing is changed partially or continuously as appropriate from the viewpoint of expanding the vehicle interior space or improving decorativeness. In particular, it is preferable that the compression rate of a portion corresponding to a protruding portion such as the vehicle floor is higher than that of other portions in order to expand the vehicle interior space. In addition, if the skin material is made of textiles or the like and the thermosetting resin oozes out onto the surface of the skin material during hot pressing and impairs the appearance of the molded product, attach a plastic film or the like to the back of the skin material or apply a filler. It is preferable to apply it.

After the thermosetting resin layer is cured, the integrally molded product is demolded to obtain a soundproofing material for a vehicle having the desired thickness and three-dimensional shape shown in FIGS. 1 to 3.

The vehicle soundproofing material thus obtained is placed directly on a dash panel, floor panel, or the like.

(Effects of the invention) The soundproofing material for vehicles according to this invention has a base material and a skin material that are crimped together through a thermosetting resin layer to form a three-dimensional meter shape along the installation site. It adheres closely to the attachment part of the device and does not lift up. As a result, the soundproofing and decorative functions can be fully demonstrated, and the vehicle interior space will not be narrowed. Moreover, since the shape is fixed by curing the thermosetting resin layer between the base material and the skin material, there is no risk of deformation during storage, transportation, etc. until being installed inside a vehicle. In addition, by partially or continuously changing the degree of compression during crimping between the base material and the skin material, the thickness can be freely changed, which is highly effective in improving decorativeness and expanding the cabin space. can be obtained. In particular, if the thickness of the protruding portion is made thinner, the floor can be made flat, for example, and the vehicle interior space can be further expanded. In addition, since it has a shape that follows the attachment site, it can be attached easily and neatly to the correct position, and the attachment position is accurate.
There is no need to make the hole for pulling in the harness large in anticipation of misalignment, and the size can be kept to the minimum necessary size, resulting in a good appearance. Furthermore, since the impregnated layer obtained by impregnating a synthetic resin foam with a resinous viscous liquid is used as one layer of the base material, the continuous pores and the action of the resinous viscous liquid that make up the synthetic resin foam provide excellent performance. It can also exhibit soundproofing, sound absorption, and vibration damping effects. Moreover, since the thermosetting resin layer is located on the surface of the base material or each layer of the base material, its curing affects only the vicinity of the surface and does not affect the inside of the impregnated layer, which reduces the soundproofing effect, etc. There's nothing to do. Furthermore, by forming the base material into multiple layers made of different materials, an excellent soundproofing effect can be obtained even against a wide range of frequencies (noise sources).

[Brief explanation of the drawing]

1 to 3 are sectional views of main parts of soundproofing materials for vehicles according to the first to third embodiments of this invention, and FIG. 4 is a sectional view of main parts of conventional soundproofing materials for vehicles. 21, 31, 41...Base material, 31a, 41a...
...Impregnated layer, 23, 33, 43...Thermosetting resin layer.

Claims (1)

[Claims for Utility Model Registration] (1) At least one layer is an impregnated layer formed by impregnating a synthetic resin foam with a resinous viscous liquid. It consists of a laminate in which a skin material is pressure-bonded through layers to form a desired three-dimensional shape, and the adhesive between the base material and the skin material and the fixation of the three-dimensional shape are achieved by curing of the thermosetting resin layer. Soundproofing material for vehicles. (2) The vehicle soundproofing material according to claim 1, which has a three-dimensional shape that follows the shape of the mounting area of the vehicle soundproofing material.