JPH0357471Y2 - - 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. Examples include a dart silencer for the purpose of soundproofing in a dartboard panel portion, and a floor carpet for the purpose of adding decoration and soundproofing to 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, sheet material such as a plastic sheet is placed on the felt 12 laid on the vehicle floor panel P.
Alternatively, a carpet material 10 such as a textile is placed, and the sheet material 10 is simply placed on the felt 12 or partially fixed with a clip or the like.

By the way, the felt 12 laid on the dash panel P etc. may not follow the shape of the panel due to its rigidity and variations in work, and may be lifted up from the panel P 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 felt, sheet material, 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 of the synthetic resin foam through an adhesive formed by applying a thermosetting resin to a synthetic resin foam, resulting in a laminate with a desired three-dimensional shape. The adhesion and fixation of the three-dimensional shape are characterized by curing of the thermosetting resin,
It has a shape that follows the shape of the attachment site.

(Function) The soundproofing material for vehicles according to this invention can be placed directly on the dashboard panel or floor panel of the vehicle.
It will be installed. At this time, since the vehicle soundproofing material has a three-dimensional shape that conforms to the shape of the part to which it is attached, it is written in close contact with the dash panel or the like without any gaps. As a result, soundproofing,
The decorative function can be fully exhibited, and the interior space of the vehicle 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. Moreover, if the hardness of the synthetic resin foam that forms the adhesive interposed between the base material and the skin material is lower than that of the synthetic resin foam that forms the impregnated layer, it is possible to In addition to the shape, when forming a decorative pattern consisting of unevenness, only the adhesive part is compressed and deformed to form the decorative pattern, and the impregnated layer part does not reduce in thickness due to compression, so it is effective for sound insulation and control. The shaking effect will not be reduced.

(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 material 20, 30, 40 includes a base material 21,
31, 41 and the skin materials 25, 35, 45 are crimped together via the adhesive bodies 23, 33, 43, and shaped into a three-dimensional shape that follows the shape of the attachment site in the vehicle,
and has a predetermined thickness.

The base material (21, etc.) is composed of one layer or multiple layers, with at least one layer being an impregnation liquid obtained by impregnating a synthetic resin foam with a resinous viscous liquid. 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 .
The base material 21 of the illustrated first embodiment and second embodiment,
Reference numeral 31 is composed of only one impregnated layer, and the base material 41 of the third embodiment is composed of an impregnated layer 41a and a fabric 41.
It consists of two layers with b. Other layers constituting the base material include plastic films, synthetic resin foam sheets, etc.
These are appropriately selected and used in combination depending on the soundproofing properties, physical properties, moldability, cushioning properties, etc. required for the soundproofing material for vehicles. 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 adhesive bodies 23, 33, and 43 are made of synthetic resin foam coated with a thermosetting resin. The synthetic resin foam used for the adhesive is a sheet-like sheet of flexible synthetic resin foam such as soft polyurethane foam, similar to that used for the impregnated layer, with a predetermined thickness. A high value is preferable.

Furthermore, this synthetic resin foam has a lower hardness than the synthetic resin foam used for the impregnated layer, so that when applying a three-dimensional pattern during pressure bonding, the thickness is mainly reduced only in the adhesive part. is particularly preferred.
Further, as the thermosetting resin, polyurethane prepolymer is suitable. For example, molecular weight 1000~
3000 polypropylene glycol and an excess of 4,4' diphenylmethane diisocyanate, which is a polyurethane prepolymer having an isocyanate terminal. This polyurethane prepolymer is prepared in the presence of water or an aqueous amine solution.
The reaction is initiated or accelerated by heating and cured, and the curing causes adhesion between the base material and the skin material (25, etc.) and fixes the three-dimensional shape. In addition, when the synthetic resin foam that forms the adhesive has a high proportion of continuous pores, the thermosetting resin applied to the synthetic resin foam is impregnated into the synthetic resin foam and forms a bond between the skin material and the base material. It oozes out onto the surface of the adhesive when it is crimped with the material, and bonds the skin material and the base material.

As the skin materials 25, 35, 45, rubber sheets, plastic sheets, plastic films, synthetic resin foam sheets, paper, textiles, etc. may be used alone or Used in selected combinations.

Note that 37 in the second embodiment is a decorative pattern consisting of a concave portion, and 49 in the third embodiment
is a hole for pulling in harnesses.

To manufacture a vehicle soundproof material having such a structure, for example, a skin material and a base material are laminated via an adhesive using a polyurethane prepolymer as a thermosetting resin, and then in the presence of water or an amine aqueous solution,
This can be easily carried out by hot pressing the laminate using a mold having a mold surface shaped like the mounting site inside the vehicle. By the hot press, the skin material is pressed onto the surface of the base material, and the laminate of the skin material and 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. At that time, if the hardness of the synthetic resin foam that forms the adhesive is lower than that of the synthetic resin foam that forms the impregnated layer, compression will mainly occur only in the adhesive, and the thickness of the impregnated layer will Almost no decrease occurs. Then, by reaction curing of the thermosetting resin, 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 held together with an adhesive, or a thermosetting resin is applied to the laminated surface of each layer, and the layers are held together 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 woven fabric 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 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 via an adhesive to form a three-dimensional shape that follows the installation site, so it is suitable for installation sites such as darts panels, etc. It adheres closely to the surface and does not lift up. Moreover, the shape is fixed by the curing of the thermosetting resin applied to the adhesive interposed between the base material and the skin material, so during storage, transportation, etc. until it is installed inside the vehicle, There is no risk of deformation. In addition, since the shape follows the attachment point, it can be attached easily and accurately in the correct position, and since the attachment position is accurate, there is no need to make the hole for pulling the harness larger in anticipation of misalignment. , the necessary minimum size is sufficient, and the appearance can be made good. Furthermore, 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, making it possible to greatly improve decorativeness and expand the interior space of the vehicle. effect 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 the impregnated layer made 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 exhibit soundproofing, sound absorption, and even vibration damping effects. Moreover, if the synthetic resin foam constituting the adhesive body is made to have a lower hardness than the synthetic resin foam constituting the impregnated layer, even when applying an uneven pattern or changing the thickness during crimping, Only the bonded body is compressed and deformed to form an uneven pattern, etc., and the impregnated layer, which affects sound insulation and vibration damping functions, is hardly compressed and the thickness of the impregnated layer does not decrease. The vibration function is not impaired by adding a pattern or the like. 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, 23, 33, 43
...Adhesive body.

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. through an adhesive made by applying it to a synthetic resin foam.
A vehicle comprising a laminate in which a skin material is crimped 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 the thermosetting resin. Soundproofing material. (2) The sound insulation material for a vehicle according to claim 1, wherein the three-dimensional shape conforms to the shape of the part to which the sound insulation material is installed.