JPH078189Y2 - Real wood products - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a genuine wood product used for automobile interior parts and the like, and more particularly to ensuring the quality of the genuine wood product and reducing the cost.

[0002]

[Background Art] In recent years, automobiles are becoming more sophisticated, and for interior parts such as armrest bases, clusters, and register bezels, real wood is used rather than synthetic wood with a simple grain transfer. Those that have been made are preferred and are being used. Then, from the viewpoints of workability, availability of wood used as a design panel, and economical efficiency, actually, a component having a laminated structure in which a design wooden board is attached to the surface of a base material made of a synthetic resin or the like. Is used.

Specifically, for example, a wood product having a laminated structure shown in FIG. 1 is known. Where 2 is
A base material made of a synthetic resin such as ABS resin, and the base material 2
A thin design wooden board 6 having a thickness of about 0.3 mm is generally laminated on the upper surface of the nonwoven fabric 4 and is integrally pressure-bonded by a method such as a vacuum laminating method. Further, the surface of the design wooden board 6 is usually subjected to a coating treatment to form an undercoat layer 10 (thickness: 15 μm to 25 μm) and a coating layer 8 (thickness: 100 to 800 μm). The coating layer 8 is formed of a polyester-based coating material or the like, and by increasing the thickness thereof, the wood grain color tone and the feeling of depth can be obtained.

The undercoat layer 10 is provided for the purpose of improving waterproofness in order to prevent moisture absorption of the design wooden board 6 because the coating layer 8 has water permeability. 6 also plays a role of a primer between the coating layer 8.
The undercoat layer 10 is usually formed of a two-component curing type polyurethane coating material or the like.

However, in the actual wood product having such a structure, the waterproof property of the undercoat layer 10 is not perfect, so that the design wood board 6 gradually expands by containing water, which causes the undercoat. As a result of the layer 10 and the coating layer 8 being pushed up, there is a problem that the coating layer 8 becomes thin and the surface of the coating film becomes itchy and silky. In order to prevent such a phenomenon, it is conceivable to increase the film thickness of the coating layer 8 and the undercoat layer 10, but the coating process will take more time and the material cost will increase. However, there is a drawback that increases the cost.

Further, since the two-component curing type polyurethane paint is used for the undercoat layer 10, forced drying and normal temperature drying are carried out.
If the coating layer 8 is not sufficiently dried, the strength of the product may be insufficient and the appearance may be deteriorated even when the coating layer 8 is cured.

[0007]

The present invention has been made in view of such circumstances, and the problem to be solved is to improve the waterproof property of a real wood product and to cause moisture absorption and expansion of a design wood board. It is to prevent thinning of the coating layer and to prevent deterioration of physical properties of the product due to insufficient drying of the undercoat layer.

[0008]

In order to solve such a problem, in the present invention, a design wooden board is stacked on a base material, and a resin sheet material made of a thermoplastic resin is further stacked on the design wooden board. The present invention has as its gist a wood product, which has a laminated structure in which they are integrally joined and has a coating film layer formed on the surface of the resin sheet material.

[0009]

[Operation / Effect] In short, in the wood product according to the present invention,
The conventional undercoat layer is eliminated, and a resin sheet material made of a thermoplastic resin is disposed between the design wood board and the coating layer. As a result, in the present wood product of the present invention, the resin sheet material ensures complete waterproofness, and the design wood board is prevented from absorbing moisture and expanding, thus effectively preventing thinning of the coating layer. It can be done. In addition, since the resin sheet material has higher waterproofness, the coating layer can be thinner than before, so that the work of the coating process can be shortened and reduced, and cost reduction can be advantageously achieved. . Furthermore, even if the coating layer is thin, the resin sheet material is thicker than the conventional undercoat layer (15 to 25 μm) (8
(About 0 μm), a sufficient thickness can be obtained with the total thickness of the coating layer and the resin sheet material, and the color tone and the feeling of depth of the grain are not lost. And by removing the undercoat layer,
The problem of deterioration of the physical properties of the product due to insufficient drying of the undercoat layer can be basically solved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to clarify the present invention more specifically, a typical embodiment of the present invention will be described in detail below with reference to the drawings.

First, FIG. 2 shows an example of a laminated structure of a wood product according to the present invention. There, 12
Is a base material similar to the conventional one and is usually made of a synthetic resin such as ABS resin and has a thickness (usually 2 to 5) at which desired strength is obtained.
3 mm). Then, on the base material 12, a wooden board 16 for design is superposed on the base material 12 via a non-woven fabric 14 and integrally bonded.

There are various types of design wood boards 16 such as wood boards in which the grain directions are aligned, wood boards in which the grain directions are intricate, and the like, which can be appropriately selected according to the application and preference. However, a wood board having a thickness of about 0.3 mm is generally used. Further, the non-woven fabric 14 is provided to enhance the adhesiveness between the base material 12 and the design wooden board 16, is generally made of a chemical fiber such as nylon-based or olefin-based, and preferably has a thickness of about 20 μm. To be Then, the non-woven fabric 14 is normally used by being integrally attached to a required surface of the design wooden board 16 with an adhesive. However, the nonwoven fabric 14 is not an essential component in the present invention.

On the design wooden board 16, a resin sheet material 2 made of a thermoplastic resin and having a thickness of about 80 μm is formed.
Since 0s are superposed and integrally joined, excellent waterproofness can be obtained, and moisture absorption and expansion of the design wooden board 16 can be effectively prevented.

As the material of the resin sheet material 20, various thermoplastic resins are used, but vinyl chloride resin (PV
Transparent materials such as C) and acrylic resin are preferably used,
Above all, a PVC sheet material is preferable. Since the resin sheet material 20 is made of a thermoplastic resin, it can be bonded to the design wooden board 16 by hot press molding or the like very easily, and can be used as an integral composite sheet material. Can be done.

Specifically, for example, a resin sheet material made of PVC in which a plasticizer is blended in a ratio of about 5 to 20 parts by weight per 100 parts by weight of resin in a wooden board 16 for design in which the above-mentioned nonwoven fabric 14 is laminated. Stack 20
A laminated structure of non-woven fabric 14-wooden board 16 for design-resin sheet material 20 is placed in a press mold heated to 90 to 160 ° C., pressed for 3 minutes under heating, and then pressed for 3 minutes while cooling the mold. It is possible to obtain an integrated composite sheet material 22 having

The composite sheet material 22 can be joined to the base material 12 by various known methods such as a vacuum laminating method and a vacuum pressing method. For example,
The vacuum pressing method can be carried out using an apparatus as shown in FIGS. 3 and 4. In those figures, 24
Is an upper mold, and 34 is a lower mold. A compressed air device (not shown) is connected to the upper mold 24 through a through hole 26, and the silicon rubber 30 (thickness: 2
(About 3 mm) can be deformed to the lower mold 34 side and pressure-bonded to the molded product placed on the lower mold 34. A heater 32 is provided in the pressurizing chamber 28 so that the silicon rubber 30 can be heated. On the other hand, the lower mold 34
A suction device (not shown) is connected to the through hole 36 so that the inside of the molding space formed by the silicone rubber 30 covering the molded product can be set to a vacuum state.

Then, using such a device, first,
As shown in FIG. 3, on the lower mold 34, the base material 12 having the surface side (the upper mold 24 side) coated with the adhesive in advance is set,
The composite sheet material 22 (nonwoven fabric 14-wood board 16 for designing-resin sheet material 20) is placed thereon. Next, as shown in FIG. 4, the upper mold 24 is brought into close contact with the lower mold 34, air is supplied to the upper mold 24, and the lower mold 34 is evacuated to a temperature of 80 to 90 ° C. by the heater 32. The heated silicon rubber 30 is pressure-bonded to the molded product (12, 22), the composite sheet material 22 is pressure-bonded along the base material 12, and the adhesion is completed. After that, the mold is opened, the molded product is taken out, and trimming is performed.

As is apparent from FIG. 2, a coating layer 18 is further formed on the surface of the resin sheet material 20, so that the present wood product has a base material 12-nonwoven fabric 14
-The wooden board 16 for design, the resin sheet material 20, and the coating film layer 18 have a laminated structure.

The coating layer 18 is formed by using various known techniques such as electrostatic coating and hand spraying using a spray gun, using the same polyester-based paint as in the conventional case. Due to the excellent waterproofness of the resin sheet material 20, the coating layer 18 can be formed to be significantly thinner than before. Even if the coating layer 18 is thinned due to the presence of the resin sheet material 20, the resin sheet material 20+
Since the total thickness of the coating layer 18 is approximately the same as the total thickness of the undercoat layer + coating layer in the conventional wood product, the same color tone and depth feeling as the conventional one can be obtained. Therefore, the coating layer 18 is usually formed with a thin thickness of about 30 to 50 μm, and the work is completed by polishing the surface with sandpaper or the like after the coating process.

Therefore, in the actual wood product having such a structure, the design wooden board 16 can be prevented from absorbing moisture, the thinning of the coating layer 18 can be effectively prevented, and the coating can be applied more than before. Since the film layer 18 can be thinned, the work of the coating process can be shortened and reduced, and cost reduction can be advantageously achieved. Further, even if the coating layer is thinned, a sufficient film thickness can be obtained in combination with the resin sheet material, so that the color tone and the feeling of depth of the grain are not lost. Then, by eliminating the undercoat layer, the problem of deterioration of the physical properties of the product due to insufficient drying of the undercoat layer can be basically solved.

The typical embodiments of the present invention have been described above in detail. However, the present invention is not limited by the description of such embodiments.
Needless to say. Further, in addition to the above-described embodiments, the present invention may be variously modified, modified, improved, etc. based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Should be understood.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view showing an example of a conventional laminated structure of a real wood product.

FIG. 2 is a cross-sectional explanatory view showing an example of a laminated structure of a wood product according to the present invention.

FIG. 3 is a diagram showing a state in which a molded product is set in a lower mold in a step of pressure-bonding a base material and a composite sheet material by a vacuum pressing method.

FIG. 4 is a diagram showing a pressed state in a step of pressure-bonding a base material and a composite sheet material by a vacuum pressing method.

[Explanation of symbols]

 12 base material 14 non-woven fabric 16 wood board for design 18 coating layer 20 resin sheet material 22 composite sheet material 24 upper mold 28 pressure chamber 30 silicon rubber 32 heater 34 lower mold

Claims (1)

[Scope of utility model registration request] 1. A laminated wooden board for designing is laminated on a base material, and a resin sheet material made of a thermoplastic resin is further laminated on the wooden board for designing, and has a laminated structure in which they are integrally joined. A wood product, wherein a coating layer is formed on the surface of the resin sheet material.